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HomeMy Public PortalAboutBayfront Levee Improvemets San Mateo Creek to Foster City Limits1 1 1 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CONTRACT BOOK BAYFRONT LEVEE IMPROVEMENTS N, SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 To be used in conjunction with APWA-AGC Standard Specifications for Public Works -Construction NOVEMBER 2010 CITY OF SAN MATEO Public Works Department 330 West 20th Avenue San Mateo, CA 94403 650/522-7300 650/522-7301 (fax) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 CITY OF SAN MATEO, CALIFORNIA BIDDERS QUESTION AND ANSWER LOG As of December 9, 2010, the following bid phase questions have been received in writing; responses from the City are provided adjacent. Question Response 1. Requested cross sections for earthwork 1. Not available - no cross sections have been developed beyond those shown in the contract drawings 2. Specifications Section 01010-1.01 B. 13 calls for the replacement of plants disturbed during construction. Are we to replace any and all trees and bushes removed at the San Mateo Creek Mouth and Seal Slough sites? 2. Refer to contract drawings, sheet notes, and tree protection notes for each location. Trees to be removed are designated on the drawings. Trees designated for removal will not be replaced. Refer to various specifications related to protection of existing improvements and Contractor's responsibilities therefore, including but not limited to SP7-9, Section 01500, and Section 02200. 3. For bid item 10, will the measurement for this work be based on the amount of rubble removed only, or will the measurement include quantity of excavation and replacement of "over -burden" material that will be necessary to get to the rubble level? 3. Refer to Addendum No. 1. 4. The project plans call for the installation of "Lightweight Engineered fill" to the finish levee grade elevations shown on the plans, for the Seal Slough & East End Levees. This is in direct conflict with specification Section 02925-1.01 B which states that the top 1.5 vertical feet of soil is to be topsoil, meeting the requirements shown in 3.02A or B or the same specification section Please advise if we are to install lightweight fill or top soil in the top 1.5' at these locations 4. The Special Provisions and Technical Specifications supersede the Plans. Topsoil shall be installed within the limits specified in the specifications. 5. Specification Section 02325 states that the installation of the Soil-Bentonite Cutoff Wall(s) should be completed using "Soil- Mixing Techniques"; the specification further discusses equipment and quality control 5. Either method for mixing and placement of soil - bentonite slurry is acceptable. The corresponding quality control requirements will apply depending on the method chosen by the Contractor. Q:\pw\PWENG\A_CONTRACTS\20I0\Bayfront Levee Improvements\Bidder Q&A log 121010.docx Page 1 of 2 practices that are indicative of completing the slurry cutoff wall using a soil -mixing drill rig method. The specification continues to refer to backfilling methods that are related to installing the cutoff walls with a more conventional method of excavating the slurry wall with an excavator and mixing the backfill either next to the excavation or at a remote location. Please clarify the intended method to be used to install the soil-bentonite cutoff wall. 6. Will the option of using vinyl sheeting for bid item 11 be considered? 6. No. 7. Specification Section 02300 states that the City of San Mateo will perform settlement monitoring and the Contractor will install settlement instrumentation as directed by the Engineer. Will the Contractor be required to remove the instrumentation? How long will the surface be monitored? 7. Refer to Addendum No. 3. 8. Will the City of San Mateo perform settlement monitoring of the Soil-Bentonite Slurry Wall after installation? 8. The City may monitor any part of the site(s) in accordance with 02300-3.07 E. Q:\pw\PWENG\A_CONTRACTS\2010\Bayfront Levee Improvements\Bidder Q&A log 121010.docx Page 2 of 2 Department of Public Works Larry A. Patterson, P. E., Director December 10, 2010 ADDENDUM NO. 3 330 West 20th Avenue San Mateo, California 94403-1388 Telephone (650) 522-7300 FAX: (650)522-7301 www.cityofsanmateo.org BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 Addendum No. 3 is issued to the above -referenced Contract Book, which is scheduled for bid opening on December 16, 2010 at 2:00 p.m. The following changes have been made: BID DATE: No Change CONTRACT BOOK: Delete Section 02300-3.07C.4. PLANS: No Change Each bidder shall acknowledge receipt of this Addendum by signing one copy of the attached Acknowledgement Sheets and returning it immediately. The bidder shall submit the second copy with the bid documents. ADDENDUM NO. 3 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ACKNOWLEDGEMENT I have received Addendum No. 3 to the Contract Book titled, "Bayfront Levee Improvements San Mateo Creek to Foster City Limit." I have read and understand the information stated in the addendum. Date Bidder's Signature Bidder's Name (Printed) Name of Company RETURN IMMEDIATELY TO: Public Works Department Attn: Support Staff • 330 West 20th Avenue San Mateo, CA 94403 (650) 522-7301 (fax) Q:1pw\PWENG A_CONTRACTS\201013ayfront Levee lmprovements\Addendum No 3.DOC ADDENDUM NO. 3 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ACKNOWLEDGEMENT I have received Addendum No. 3 to the Contract Book titled, "Bayfront Levee Improvements San Mateo Creek to Foster City Limit." I have read and understand the information stated in the addendum. Date Bidder's Signature Bidder's Name (Printed) Name of Company RETURN WITH BID DOCUMENTS Q:\pw\PWENGW_CONTRACTS\20 105Bayfront Levee Improvements\Addendum No 3.DOC Department of Public Works Larry A. Patterson, P. K, Director December 9, 2010 330 West 20th Avenue San Mateo, California 94403-1388 4giNicZ stP Telephone (650) 522-7300 01 ADDENDUM NO. 1 FAXofsan(650ateo. rg www. cityofsanmateo.org BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TOFOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 Addendum No. 1 is issued to the above -referenced Contract Book, which is scheduled for bid opening on December 16, 2010 at 2:00 p.m. The following changes have been made: BID DATE: No Change CONTRACT BOOK: Schedule of Bid Items is revised as follows: For Bid Item No. 10 - Removal of Rubble from Seal Slough Site, the estimated quantity is changed to 15 and the unit is changed to TON. Revised Bid Schedule is attached. Section 01025-1.04.C.10 is revised to read: "Removal of Rubble from Seal Slough Site - The unit price bid per ton for this item shall constitute full compensation to off -haul and dispose of concrete rubble and other material unsuitable for reuse as fill or backfill, encountered in excavation for work at Seal Slough site. Measurement shall be the actual weight of material disposed as determined by weight certificate." ,Delete Section 02300-3.06.B.2.b.2. Add Section 02300-3.06.B.4: "Removal of Buried Objects - If a buried object, with largest dimension of 24" or less is encountered in excavation and its removal and disposal is not included in another item of work, payment for the removal and disposal will be considered as included in the contract price paid for the type of work which includes the excavation in which the object is encountered. If a buried object with largest dimension greater than 24" is encountered in excavation and its removal and disposal is not included in another item of work, the removal and disposal of the object will be paid for as extra work as provided in Section SP 3-3.1 if the Contractor so requests in writing. The request shall be made prior to removal." PLANS: "X -SECTION F" on sheet 10 (of 44) is revised. An 8 1/2" x 11" copy of the revised section is attached. - The full scale revised plan sheet is available on the City's website at httn://www.citvofsanmateo.org under the tab "Departments > Bids and Proposals". Each bidder shall acknowledge receipt of this Addendum by signing one copy of the attached Acknowledgement Sheets and returning it immediately. The bidder shall submit the second copy with the bid documents. ADDENDUM NO. 1 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ACKNOWLEDGEMENT I have received Addendum No. 1 to the Contract Book titled, "Bayfront Levee Improvements San Mateo Creek to Foster City Limit." I have read and understand the information stated in the addendum. Date Bidder's Signature Bidder's Name (Printed) Name of Company RETURN IMMEDIATELY TO: Public Works Department Attn: Support Staff 330 West 20th Avenue San Mateo, CA 94403 (650) 522-7301 (fax) Q:\pw\PWENG\A_CONTRACTS\2010\Bayfront Levee Improvements \ Addendum No 1.doc ADDENDUM NO. 1 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ACKNOWLEDGEMENT I have received Addendum No. 1 to the Contract Book titled, "Bayfront Levee Improvements San Mateo Creek to Foster City Limit," I have read and understand the information stated in the addendum. Date Bidder's Signature Bidder's Name (Printed) Name of Company RETURN WITH BID DOCUMENTS Q:\pw\PWENG\A_CONTRACTS120101Bayfront Levee Improvements\ Addendum No 1.doc SCHEDULE OF BID ITEMS (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ITEM NO. DESCRIPTION OF WORK EST. QTY. UNIT UNIT PRICE TOTAL COST 1 Mobilization and Demobilization I LS $ $ 2 Bonds and Insurance 1 LS $ $ 3 Pedestrian and Traffic Control 1 LS $ $ 4 Work Planning and Submittals 1 LS $ $ 5 San Mateo Creek Site Work (North) I LS $ $ 6 San Mateo Creek Site Work (South) I LS $ $ 7 Detroit Drive Site Work 1 LS $ $ 8 Replacement of Foundation Soil at Floodwalls 4,000 CY $ $ 9 Seal Slough Levee Site Work 1 LS $ $ 10 Removal of Rubble from Seal Slough Site 15 TN $ $ 11 Construction of Cutoff Wall at Seal Slough Site 10,500 SF $ $ 12 East End Levee Site Work 1 LS $ $ 13 Removal of Rubble from East End Levee 1,000 CY $ $ 14 Reconstruction of East End Levee Fill 1,000 CY $ $ 15 Construction of Cutoff Wall at East End Levee 33,000 SF $ $ 16 Structural Floodwall No. I 1 LS $ $ 17 Structural Floodwall No. 2 1 LS $ $ 18 Structural Floodwall No. 3 1 LS . $ $ 19 Structural Floodwall No. 4 I LS $ $ 20 Structural Floodwall No. 5 1 L5 $ $ 21 Structural Floodwall No. 6 1 LS $ $ 22 Structural Floodwall No. 7 ' I LS $ $ 23 Structural Floodwall No. 8 1 LS $ $ 24 Structural Floodwall No. 9 1 LS $ $ 25 Asphalt Concrete Surfacing 1 LS $ $ 26 Re -vegetation 1 LS $ $ TOTAL BID $ B' CNNNUN( FENCE DOLIED TO TOP OF FLOOD*NL—\ .. __... SEE "'DUAL '__.,\.... m 107 (E) FENCE E TO BE REUWED '_.SEAL SLOUGH.__.. 100-YR 11DE 1043 STRUCTURAL FLOODWN.L (7 EO.W; 10&0 SEE STRUCTURAL PLANS FOR DETARS''. w z CL2 AB (TYP) 20 90 40 50 X -SECTION F (STA 300+93) NOT -TO -SCALE - GREG'S TRUCKING BUILDING 11 pct .i =rs,^. I' BOTTOM OF SLURRY WALL AT EL 80.010R 5' INTO -...BAYIMUD.- WHICHEVER .IS.OEEPER.--.a......_.. CONRRM DEPTH WITH ENGINEER BASED ON ACTUAL F&LD CONDITIONS i 190 10 70 BAYFRONT LEVEE IMPROVEMENTS ADDENDUM NO. 1 REVISED SHEET 10 OF 44 - CROSS SECTION F CITY OF SAN MATEO DECEMBER 9, 2010 Department of Public Works Larry A. Patterson, P. E., Director December 9, 2010 ADDENDUM NO. 2 330 West 20th Avenue San Mateo, California 94403-1388 Telephone (650) 522-7300 FAX: (650)522-7301 www.cityofsanmateo.org BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 Addendum No. 2 is issued to the above -referenced Contract Book, which is scheduled for bid opening on December 16, 2010 at 2:00 p.m. The following changes have been made: BID DATE: No Change CONTRACT BOOK: The following is added to Section 01020-1.OlA under subheading I: "Prior to beginning work within the Foster City city limits, Contractor shall obtain a no -cost encroachment permit from the City of Foster City and name the City of Foster City as an additional insured." Section 01600-1.OIA is revised to read: "Construction shall not take place at the East End Levee Site from February 1 through August 31 due to permit restrictions placed on the City to protect California clapper rail, unless the City provides prior written approval. The City will monitor bird populations under separate contract; and only if approved by the applicable regulatory agencies, may allow construction during these referenced dates. Contractor shall not assume such approval; but rather, that his operations at this work site will be limited to the period between September 1, 2011 and January 31, 2012. No time extension will be granted based on this permit requirement. Disruptions to construction caused by the presence of nesting birds at the East End Levee Site from September 1, 2011 through January 31, 2012 will be treated as an excusable delay and a time extension will be granted as provided for in the Special Provisions." Section 01600-1.01C.4. is deleted in its entirety. (Refer to Section 01020-1.04) PLANS: No Change Each bidder shall acknowledge receipt of this Addendum by signing one copy of the attached Acknowledgement Sheets and returning it immediately. The bidder shall submit the second copy with the bid documents. ADDENDUM NO. 2 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ACKNOWLEDGEMENT I have received Addendum No. 2 to the Contract Book titled, "Bayfront Levee Improvements San Mateo Creek to Foster City Limit." I have read and understand the information stated in the addendum. Date Bidder's Signature Bidder's Name (Printed) Name of Company RETURN IMMEDIATELY TO: Public Works Department Attn: Support Staff 330 West 20th Avenue San Mateo, CA 94403 (650) 522-7301 (fax) Q:\pw\PWENG\A_CONTRACTS\20101Bayfront Levee Improvements \ Addendum No 2.doc ADDENDUM NO. 2 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ACKNOWLEDGEMENT I have received Addendum No. 2 to the Contract Book titled, "Bayfront Levee Improvements San Mateo Creek to Foster City Limit." I have read and understand the information stated in the addendum. Date Bidder's Signature Bidder's Name (Printed) Name of Company RETURN WITH BID DOCUMENTS Q:\pwWWENG\A_CONTRACTS\20101Bayfront Levee Improvements\Addendum No 2.doc PROPOSAL FORM (Entire proposal to be submitted as sealed bid.) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 TO THE HONORABLE CITY COUNCIL CITY OF SAN MATEO, CALIFORNIA DEAR COUNCIL MEMBERS: FOR THE TOTAL SUM OF (use figures only) computed from the unit and/or lump sum prices shown on the attached schedule of bid items, the undersigned hereby proposes and agrees that if this proposal is accepted he or she will contract with the City of San Mateo, California, to furnish all labor, materials, tools, equipment, transportation, and all incidental work and services required to complete all items of work shown in the contract documents. All work shall conform to the lines, grades, and dimensions shown on said drawings and shall be done in accordance with this Contract Book and APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition. The work for which this proposal is submitted is for construction in conformance with the special provisions (including the payment of not less than the State general prevailing wage rates) the project plans described below, including the addenda thereto, the contract annexed hereto, and also in conformance with the APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition and the Labor Surcharge and Equipment Rental rates in effect on the date the work is accomplished. This proposal is also subject to the terms and conditions of the. attached LIST OF SUBCONTRACTORS and BIDDER'S STATEMENT. ADDENDA — This proposal is submitted with respect to the changes to the contract included in the addenda number/s By my signature on this proposal I certify, under penalty of perjury under the laws of State of California and United States of America, that the Non Collusion Affidavit required by Title 23 United States Code, Section 112 and Public Contract Code Section 7106 is true and correct. The work shall be paid for at the unit and/or lump sum prices shown on the attached SCHEDULE OF BID I I EMS. Contractor's Signature Date Name of Company ( ) Phone Number ( ) Fax Number Q:\pw\PWENG\Zammit\Bayfont Levee South \ CONTRACT - FINAI:\Contract Book -Final\Notice and Front End- Bay&ont.doc A-4 Bids are to be submitted for the entire work. The amount of the bid for comparison purposes will be the total of all items. The bidder shall set forth for each unit basis item of work a unit price and a total for the item, and for each lump sum item a total for the item, all in clearly legible figures in the respective spaces provided for that purpose. In the case of unit basis items, the amount set forth under the "Item Total" column shall be the product of the unit price bid and the estimated quantity for the item. In case of discrepancy between the unit price and the total set forth for a unit basis item, the unit price shall prevail, except as provided in (a) or (b), as follows: (a) If the amount set forth as a unit price is unreadable or otherwise unclear, or is omitted, or is the same as the amount as the entry in the item total column, then the amount set forth in the item total column for the item shall prevail and shall be divided by the estimated quantity for the item and the price thus obtained shall be the unit price; (b) (Decimal Errors) If the product of the entered unit price and the estimated quantity is exactly off by a factor of ten, one hundred, etc., or one -tenth, or one -hundredth, etc. from the entered total, the discrepancy will be resolved by using the entered unit price or item total, whichever most closely approximates percentagewise the unit price or item total in the City of San Mateo 's Final Estimate of cost. If both the unit price and the item total are unreadable or otherwise unclear, or are omitted, the bid may be deemed irregular. Likewise if the item total for a lump sum item is unreadable or otherwise unclear, or is omitted, the bid may be deemed irregular unless the project being bid has only a single item and a clear, readable total bid is provided. Symbols such as commas and dollar signs will be ignored and have no mathematical significance in establishing any unit price or item total or lump sums. Written unit prices, item totals and lump sums will be interpreted according to the number of digits and, if applicable, decimal placement. Cents symbols also have no significance in establishing any unit price or item total since all figures are assumed to be expressed in dollars and/or decimal fractions of a dollar. Bids on lump sum items shall be item totals only; if any unit price for a lump sum item is included in a bid and it differs from the item total, the items total shall prevail. The foregoing provisions for the resolution of specific irregularities cannot be so comprehensive as to cover every omission, inconsistency, error or other irregularity which may occur in a bid. Any situation not specifically provided for will be determined in the discretion of the City of San Mateo, and that discretion will be exercised in the manner deemed by the City of San Mateo to best protect the public interest in the prompt and economical completion of the work. The decision of the City of San Mateo respecting the amount of a bid, or the existence or treatment of an irregularity in a bid, shall be final. Q \pw\PWENG\Zammlt\Bayfroni Levee South \CONTRACT - FINAL \Contract Book - Final \Notice and Front End - Bayfrontdoc A-5 If this proposal shall be accepted and the undersigned shall fail to enter into the contract and furnish the two bonds in the sums required by the Public Contract Code, with surety satisfactory to the City Of San Mateo, within 8 days, not including Saturdays, Sundays and legal holidays, after the bidder has received notice from the City of San Mateo that the contract has been awarded, the City of San Mateo may, at its option, determine that the bidder has abandoned the contract, and thereupon this proposal and the acceptance thereof shall be null and void and the forfeiture of the security accompanying this proposal shall operate and the same shall be the property of the City of San Mateo. By my signature on this proposal, as bidder, declares that the only persons or parties interested in this proposal as principals are those named herein; that this proposal is made without collusion with any other person, firm, or corporation; that he or she has carefully examined the location of the proposed work, the annexed proposed form of contract, and the plans therein referred to; and he or she proposes, and agrees if this proposal is accepted, that he or she will contract with the City of San Mateo, in the form of the copy of the contract annexed hereto, to provide all necessary machinery, tools, apparatus and other means of construction, and to do all the work and furnish all the materials specified in the contract, in the manner and time therein prescribed, and according to the requirements of the Engineer as therein set forth, and that he or she will take in full payment therefor the following prices, as shown on the Schedule of Bid Items. Q:\pw\PWENG\Zanunit\Bayfont Levee South \ CONTRACT - FINAL Contract Book - Fina1\Notice and Front End - Bayfrontdoc A-6 SCHEDULE OF BID ITEMS (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ITEM NO. DESCRIPTION OF WORK EST. QTY. UNIT UNIT PRICE TOTAL COST 1 Mobilization and Demobilization 1 LS S $ 2 Bonds and Insurance 1 LS $ $ 3 Pedestrian and Traffic Control 1 LS $ $ 4 Work Planning and Submittals I LS $ $ 5 San Mateo Creek Site Work (North) I LS $ $ 6 San Mateo Creek Site Work (South) 1 LS $ $ 7 Detroit Drive Site Work I LS $ $ 8 Replacement of Foundation Soil at Floodwalls 4,000 CY $ $ 9 Seal Slough Levee Site Work 1 LS $ S 10 Removal of Rubble from Seal Slough Site 200 CY $ $ 11 Construction of Cutoff Wall at Seal Slough Site 10,500 SF $ $ 12 East End Levee Site Work 1 LS $ $ 13 Removal of Rubble from East End Levee 1,000 CY $ $ 14 Reconstruction of East End Levee Fill 1,000 CY $ $ 15 Construction of Cutoff Wall at East End Levee 33,000 SF $ $ 16 Structural Floodwall No. 1 1 LS $ $ 17 Structural Floodwall No. 2 1 LS $ $ 18 Structural Floodwall No. 3 1 LS $ $ 19 Structural Floodwall No. 4 1 LS $ $ 20 Structural Floodwall No. 5 I LS $ $ 21 Structural Floodwall No. 6 1 LS $ $ 22 Structural Floodwall No. 7 1 LS $ $ 23 Structural Floodwall No. 8 1 LS $ S 24 Structural Floodwall No. 9 1 LS $ $ 25 Asphalt Concrete Surfacing 1 LS $ $ 26 Re -vegetation 1 LS $ $ TOTAL BID $ Q:\pw\P WENG\Zammit\Bayfront Levee South \CONTRACT - FINAL\Contract Book - Final\Notice and Front End - Bayfionrdoc A.7 SUBCONTRACTING REQUIREMENTS AND LIST OF SUBCONTRACTORS (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 Each bidder acknowledges it is aware and familiar with the requirements related to subletting and subcontracting set forth in Section 2-3 of the APWA-AGC Standard Specifications, and in the Subletting and Subcontracting Fair Practices Act, commencing with Section 4100 of the Public Contract Code of the State of California. These requirements include a provision that the Contractor shall perform, with its own organization, contract work amounting to at least 50 percent of the contract price. Each bidder in submitting his bid for the doing of the work or improvement shall in his bid or offer, in accordance with the provisions of Section 4104 of the Public Contract Code of the State of California, set forth the following: 1- Name and address of the place of business of each subcontractor who will perform work or labor or render service to the general contractor in or about the construction of the work or the improvement in an amount in excess of one-half (1/2) of one percent (1%) of the general contractor's total bid or $10,000, whichever is greater. 2. The specific work and dollar amount of work that will be done by each subcontractor. 3. If no portion of the work is to be subcontracted as provided in item 1, insert the word "none" in the space provided and sign below. NAME ADDRESS SPECIFIC WORK DOLLAR AMOUNT $ $ $ $ $ Contractor's Signature Q:\pw\PWENG'Zammit\Bayfront Levee South\CONTRACT- FINAL \Contract Book - Final\ Notice and From End - Bayfronidoc A-8 BIDDER'S STATEMENT SHEET 1 OF 3 (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 The undersigned has carefully read the APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition, and realizes that any variation or deviation from these specifications, requirements and conditions shall be sufficient grounds forrejection of all or any part of the work performed. Such rejected work shall be replaced entirely at the Contractor's expense, and failure to do so within a reasonable length of time shall be sufficient reason for the withholding of payment for any part of or all of the work and forfeiture of the Contractor's bond. The undersigned further certifies that he or she is licensed by the State of California as a Class A Contractor, that the license is now in force, and that the number is and the expiration date is . Further the undersigned certifies that upon request he or she will provide evidence of said license. Pursuant to Business and Professions Code Section 7028.15 I, , declare under penalty of perjury that the foregoing and the statements contained in the bid for the above titled project are true and correct and that this declaration is made on this _ day of , , at , California. The undersigned understands he or she must meet the requirements of Section SP -7-2.3, NON- DISCRIMINATION POLICY prior to award of contract and conform to those guidelines throughout the duration of the contract. It is understood that the quantities set forth herein are approximate only and are to be used only for the comparison of bids and the guidance of the bidder. If awarded the contract, the undersigned hereby agrees to sign and file an agreement, attached as Appendix 1, together with the necessary bonds, certificate(s) of insurance, related endorsements for general and automobile liability insurance, and proof of a San Mateo Business License in the office of the City Clerk within eight (8) days, not including Saturdays, Sundays and legal holidays, after the bidder has received notice from the City of San Mateo that the contract has been awarded and to commence work within five (5) days of the date specified in the notice to proceed, and to complete the work under said contract within the specified number of calendar days beginning from the date specified in the notice to proceed. Further, the undersigned agrees to insure that all subcontractors obtain a San Mateo Business License in accordance with Section SP -2-13, SAN MATEO BUSINESS LICENSE GUIDELINES. Contractor and all subcontractors also agree to keep the Business License current for the entire term of the contract. If the unit price and the total amount named by a bidder for any item do not agree, it will be assumed that the error was made in computing the total amount and the unit price alone will be considered as representing the bidder's intention. Unit prices bid must not be unbalanced. Q'tpw\PWENG\Zammit\Bayfront Levee South\CONTRACT - FINAL- Contract Book - Final\Notice and Front End. Bayfront.doc A-9 BIDDER'S STATEMENT SHEET 2 OF 3 (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 The undersigned has checked carefully all the figures listed in the Schedule of Bid Items and understands that the City will not be responsible for any errors or omissions on the part of the undersigned in making up this bid. Enclosed find bond or certified check or cashier's check no. of the Bank for . Not less than ten (10) percent of this bid payable to the City of San Mateo, California, and which is given as a guarantee that the undersigned will enter into the contract if awarded to the undersigned. The undersigned agrees that this bid may not be withdrawn for a period of forty-five (45) days after the date set for the opening thereof. NOTE: IF THE PROPOSAL IS MADE BY AN INDIVIDUAL, HIS NAME AND POST OFFICE ADDRESS MUST BE SHOWN. IF THE PROPOSAL IS MADE BY A PARTNERSHIP, THE NAME AND ADDRESS OF EACH MEMBER OF THE FIRM OR PARTNERSHIP MUST BE SHOWN (if more than two members of a firm or partnership, please attach an additional page); OR IF MADE BY A CORPORATION, THE PROPOSAL SHALL SHOW THE NAME OF THE STATE UNDER THE LAWS OF WHICH THE CORPORATION WAS CHARTERED AND THE NAMES, TITLES AND BUSINESS ADDRESSES OF THE PRESIDENT, SECRETARY AND TREASURER OF SAID CORPORATION. Q.\pw\PWENG\Zammit\Bayfront Levee SouthCONTRACT - FINAL\Contract Book - Final\ Notice and Front End - Bayfront.doc A-10 BIDDER'S STATEMENT SHEET 3 OF 3 (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 SIGNATURES FOR BIDDER: If INDIVIDUAL, sign below: If CORPORATION, sign below (show names of non -signing officers): Signature Date a CORPORATION Print name Name of State Where Chartered Post Office Address If PARTNERSHIP, sign below (show names of non -signing partners): Signature Date Print name of person signing bid Signature Date Title List names of the following officers: Name of Partner Post Office Address PRESIDENT SECRETARY Signature Date TREASURER Name of Partner Post Office Address Post Office Address (if different) Q:\pw\PWENG\ZamminBayfont Levee South \ CONTRACT -FINAL\Contraci Book -Final\Notice and Front End - Bayfont.doc A -I I NONCOLLUSION AFFIDAVIT (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 State of California ) ss. County of , being first duly sworn, deposes and says that he or she is of the party making the foregoing bid that the bid is not made in the interest of, or on behalf of, or any undisclosed person, partnership, company, association, organization, or corporation; that the bid is genuine and not collusive or a sham; that the bidder has not directly or indirectly induced or solicited any other bidder to put in a false or sham bid, and has not directly or indirectly colluded, conspired, connived, or agreed with any bidder or anyone else to put in a sham bid, or that anyone shall refrain from bidding; that the bidder has not in any manner, directly or indirectly, sought by agreement, communication, or conference with anyone to fix the bid price, or of that of any other bidder, or to secure contract; that all statements contained in the bid are true; and, further, that the bidder has not, directly or indirectly, submitted his or her bid price or any breakdown thereof, or the contents thereof, or divulged information or data relative thereto, or paid, and will not pay, any fee to any corporation, partnership, company association, organization, bid depository, or to any member or agent thereof to effectuate a collusive or sham bid. Note: The above affidavit is part of the Proposal. Signing this Proposal on the signature portion thereof shall also constitute signature of this affidavit. Q:\pw\PWENG\Zammit\Bayf ont Levee South \ CONTRACT - FINAL \Contract Book - final\Notice and From End - Bayfroni doc A-12 CERTIFICATION OF NON-DISCRIMINATION (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 On behalf of the bidder making this proposal, the undersigned certifies that there will be no discrimination in employment with regard to race, color, religion, sex, disability, or national origin; that all federal, state, local directives, and executive orders regarding non-discrimination in employment will be complied with; and that the principle of equal opportunity in employment will be demonstrated positively and aggressively. BIDDER By: (Name and title of person making certification) Date Q:\pw\FWENG\Zammit\Bayfront Levee South \ CONTRACT - FINAL\Contract Book - Final\Notice and Front End - Bayfront.doc A.13 CERTIFICATION OF PAYMENT OF PREVAILING WAGE SCALE (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 On behalf of the bidder, the undersigned certifies that the Prevailing Wage Scale, as determined by the Director of Industrial Relations of the State of California, in force on the day this bid was announced, will be the minimum paid to all craftsmen and laborers working on this project. In some cases, prevailing wage determinations have either a single asterisk (*) or double asterisks (**) after the expiration date. In cases where the prevailing wage determinations have a single asterisk (*) after the expiration date which are in effect on the date of advertisement for bids, such determinations remain in effect for the life of the project. Prevailing wage determinations which have double asterisks (**) after the expiration date indicate that the basic hourly wage rate, overtime, and holiday pay rates, and employer payments to be paid for work performed after this date have been predetermined. If work is extended past this date, the new rate must be paid and should be incorporated in contracts the Contractor enters into. A copy of the correct determination will be posted at the job site. It is understood that it is the responsibility of the bidder to determine the correct scale. The City will keep a copy of the wage scale in the City Clerk's office for the convenience of bidders. Any errors or defects in the materials in the City Clerk's office will not excuse a bidder's failure to comply with the actual scale then in force. The undersigned understands that weekly certified payrolls must be submitted for verification. BIDDER By: (Name and title of person making certification) Date Questions shall be addressed to: Department of Labor Relations Division of Labor Statistics and Research Prevailing Wage Unit 45 Fremont Street, Suite 1160 P. O. Box 420603 San Francisco, CA 94142-0603 Q:\pw`BWENG\2ammit\Bayfront Levice Sou,h\CONTRACT - FINAL\Contract Book - FinalNotice and Front End - Bayfrom Aoc A -I4 CERTIFICATION OF REQUIREMENT TO PAY WORKERS' COMPENSATION (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 l am aware of the provisions of Section 3700 of the Labor Code that require every employer to be insured against liability for workers' compensation or to undertake self-insurance in accordance with the provisions of that code, and I will comply with such provisions before commencing the performance of the work of this contract. BIDDER By: (Name and title of person making certification) Date Q:1pw\PWENG\ZanuNt\Bayfont Levee South \ CONTRACT - FINAL \Contract Book - Final\ Notice and Front End - Bayfontdoe A -I5 I 1 1 1 1 1 1 1 1 1 1 CONTRACT BOOK BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 CITY OF SAN MATEO, CALIFORNIA CITY COUNCIL AWARD CONTRACT DRAWINGS NO. 2-20-40 (44 sheets) TIME OF COMPLETION: January 31, 2012 CONTENTS NOTICE INVITING SEALED PROPOSALS PROPOSAL FORM SCHEDULE OF BID ITEMS LIST OF SUBCONTRACTORS BIDDERS STATEMENT NONCOLLUSION AFFIDAVIT CERTIFICATION OF NON-DISCRIMINATION CERTIFICATION OF PAYMENT OF PREVAILING WAGE SCALE CERTIFICATION OF REQUIREMENT TO PAY WORKERS' COMPENSATION SPECIAL PROVISIONS TECHNICAL PROVISIONS STANDARD DRAWINGS APPENDIX I — AGREEMENT FOR PUBLIC IMPROVEMENT APPENDIX II — PRE -APPROVED CONSTRUCTION STAGING AREAS 1 — MATERIAL STOCKPILING 2 — HAUL ROUTES APPENDIX III — CONSTRUCTION ADVANCE NOTICES 1 — TRAFFIC / BUSINESS DISRUPTION NOTICE Q:\pw\PWENCIVammitNBayfront Levee South ACONTRACT! - FINAL AContract Book - FinalAContcnts - Bayfront.doe 1 1 1 1 I 1 1 1 1 1 1 NOTICE INVITING SEALED PROPOSALS BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 CITY OF SAN MATEO, CALIFORNIA 1. Sealed bids will be received from prequalified contractors only by the City Council of the City of San Mateo, California, for Bayfront Levee Improvements: San Mateo Creek to Foster City Limit and other work as shown on the Contract Drawings No. 2-20-40 and as described in this Contract Book and the APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition. The work described requires that the bidder be licensed by the State of California as a Class A Contractor. Only those contractors listed on the City's final prequalified bidders list dated November 11, 2010 are eligible to bid. Bids from all other contractors will remain unopened and be discarded. 2. Contract Book, plans and proposal forms are available at the Public Works Department, City Hall, 330 West 20th Avenue, San Mateo, California. One copy of the contract book, plans, and proposal forms will be available to prequalified contractors at no charge. A non-refundable fee of $50 per set is required for additional copies or for each set if mailed. The non-refundable fee of $50 per set will also be required for copies provided to any person or entity that is not on the prequalifiedbidderslist. 3. The estimated construction cost of this project is $3,500,000 to $5,000,000. This estimate is not based on a "contractor's cost take off' of the project, but is derived from an averaging of costs for work on similar projects in the area of which the City is aware. This figure is given to indicate the relative order of magnitude of this project and is not intended to influence or affect in any way the amount of the bid for this project. 4. All bids shall be accompanied by a bid bond, cashier's check, or certified check made payable to the City of San Mateo in an amount not less than ten percent (10%) of the aggregate amount of the bid. 5. Contractor is notified that he or she shall comply with the requirements for Non - Discrimination as set forth in Special Provisions SP -7-2.3 through SP -7-2.3.3. 6. Addenda issued during the time of bidding shall become a part of the documents furnished bidders for the preparation of bids, shall be covered in the bids, and shall be made a part of the Contract. Each bid shall include specific acknowledgement in the space provided of receipt of all Addenda issued during the bidding period. Failure to so acknowledge may result in the bid being rejected as not responsive. Failure of any bidder to receive such Addenda shall not be grounds for non-compliance with the teens of the instructions. It is the responsibility of the contractor to contact the City to determine the existence of any and all addenda. 7. Prequalified bidders must attend a mandatory pre -bid meeting and site walk-through scheduled November 18, 2010 at 9:00 a.m. in Conference Room A at City Hall (330 20th Q.AFwvPWENGVZammiiAI3ayfront Levee southACONTRACT - FINAL AContract Book - Final hNonce and Fmnt End - Bayfront.doe A -I 1 1 1 1 1 1 1 Avenue). Any bid submitted by a bidder that does not attend this meeting shall remain sealed and unopened. 8. Construction shall be complete by January 31, 2012. No contract time extensions will be granted for weather delays. 9. The right is reserved, as the interest of the City may require, to reject any or all bids, to waive any informality in bids, and to accept, modify, or reject any items of the bid, or in the case of a single bid being received to extend the acceptance date by up to thirty (30) days with notice. The City of San Mateo is a charter City and any contract entered into is subject to the provisions of the City of San Mateo Charter, which may supersede certain provisions of the Public Contract Code and other provision of state law. 10. In general, the prevailing wage scale, as determined by the Director of Industrial Relations of the State of California, in force on the day this bid was announced, will be the minimum paid to all craftsmen and laborers working on this project In some cases, prevailing wage determinations have either a single asterisk (*) or double asterisks (**) after the expiration date in effect on the date of advertisement for bids. In cases where the prevailing wage determinations have a single asterisk (*) after the expiration date which are in effect on the date of advertisement for bids, such determinations remain in effect for the life of the project. Prevailing wage determinations which have double asterisks (**) after the expiration date indicate that the basic hourly wage rate, overtime, and holiday pay rates, and employer payments to be paid for work performed after this date have been predetermined. If work is extended past this date, the new rate must be paid and should be incorporated in contracts the Contractor enters into. Pursuant to Section 1773 of the Labor Code, the general prevailing wage rates in the county, or counties, in which the work is to be done have been determined by the Director of the California Department of Industrial Relations. The wages as set forth in the General Prevailing Wage Rates for this project will be posted at the job site. It is understood that it is the responsibility of the bidder to determine the correct scale. The City will keep a copy of the wage scale in the City Clerk's office for the convenience of bidders. The State Prevailing Wage Rates may also be obtained from the California Department of Industrial Relations intemet web site at http://www.dir.ca.gov. Any errors or defects in the materials in the City Clerk's office will not excuse a bidder's failure to comply with the actual scale then in force. 1 1. The deadline for submission of questions and clarifications concerning the Contract Documents is December 9, 2010. All questions prior to deadline shall be submitted in writing to Ms. Cathi Zammit, P.E., Senior Engineer, via fax at (650) 522-7351, or via mail to the above address. Responses to all submissions will be sent to each plan holder on or before December 13, 2010 via the fax number furnished to the City. Bidders will be added to the plan holder list only when they obtain the Contract Documents from the City. If no fax number is provided, the Contractor is responsible for contacting the City to obtain responses to bidder questions. Only Contractors listed on the plan holders list shall receive responses to bidder questions. Only signed addenda issued by the Department of Public Works are binding. Q:'pwVPWENGIZammilAHayfrnnl levee South VCONTRACT -FINALVContract Hook- FinaFNotice and Front End - Davfronl.doe A-2 1 1 1 1 1 1 1 1 1 1 12. Said sealed proposals shall be delivered to the City Clerk, City Hall, 330 West 20th Avenue, San Mateo, California 94403, at or before 2:00 p.m., December 16, 2010, and they shall be opened and read by a City Representative at said date and time at a public meeting called by him or her. 13. Said City Representative shall report the results of the bidding to the City Council at a later date, at which time the City Council may award the contract to the lowest responsible prequalified bidder as so reported; or as City's interest may dictate. The City Council may exercise its right to modify the award or to reject any or all bids. Any protests to award of contract shall follow the procedures outlined in City Council Resolution No. 61, dated June 7, 2004. 14. To ensure performance, City reserves the right to, retain ten percent (10%) of the contract price for 35 days after it records the Notice of Completion. However, pursuant to the Public Contracts Code Section 22300, Contractor may substitute securities for said ten percent (10%) retention or request that City make payments of retentions earned directly to an escrow agent at Contractor's expense. The provisions of the Public Contracts Code Section 22300 are hereby expressly made a part of the contract. 15. Award and execution of this contract are contingent upon the City's successful sale of bonds. The decision to issue the bonds will be made in the City's sole discretion. Dated: November 11, 2010 /S/ John Lee, MAYOR Q:\pwVPWENGAZammitABayfmm Levee SouttrACONTRACT- FINALvContract Book - Final ANotice and Front End - Bayfront.doe A-3 1 1 1 1 1 1 1 PROPOSAL FORM (Entire proposal to be submitted as sealed bid.) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 TO THE HONORABLE CITY COUNCIL CITY OF SAN MATEO, CALIFORNIA DEAR COUNCIL MEMBERS: FOR THE TOTAL SUM OF (use figures only) computed from the unit and/or lump sum prices shown on the attached schedule of bid items, the undersigned hereby proposes and agrees that if this proposal is accepted he or she will contract with the City of San Mateo, California, to furnish all labor, materials, tools, equipment, transportation, and all incidental work and services required to complete all items of work shown in the contract documents. All work shall conform to the lines, grades, and dimensions shown on said drawings and shall be done in accordance with this Contract Book and APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition. The work for which this proposal is submitted is for construction in conformance with the special provisions (including the payment of not less than the State general prevailing wage rates) the project plans described below, including the addenda thereto, the contract annexed hereto, and also in conformance with the APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition and the Labor Surcharge and Equipment Rental rates in effect on the date the work is accomplished. This proposal is also subject to the terms and conditions of the attached LIST OF SUBCONTRACTORS and BIDDER'S STATEMENT. ADDENDA — This proposal is submitted with respect to the changes to the contract included in the addenda number/s By my signature on this proposal I certify, under penalty of perjury under the laws of State of California and United States of America, that the Non Collusion Affidavit required by Title 23 United States Code, Section 112 and Public Contract Code Section 7106 is true and correct. The work shall be paid for at the unit and/or lump sum prices shown on the attached SCHEDULE OF BID ITEMS. Contractor's Signature Date Name of Company Phone Number ( ) Fax Number cftpwVPW ENGVammnABayfront Levee South VCONTRACT - F[NAL\Contract Book - FinalANotiee and Front End - Bayfront.doc A-4 1 1 1 1 I Bids are to be submitted for the entire work. The amount of the bid for comparison purposes will be the total of all items. The bidder shall set forth for each unit basis item of work a unit price and a total for the item, and for each lump sum item a total for the item, all in clearly legible figures in the respective spaces provided for that purpose. In the case of unit basis items, the amount set forth under the "Item Total" column shall be the product of the unit price bid and the estimated quantity for the item. In case of discrepancy between the unit price and the total set forth for a unit basis item, the unit price shall prevail, except as provided in (a) or (b), as follows: (a) If the amount set forth as a unit price is unreadable or otherwise unclear, or is omitted, or is the same as the amount as the entry in the item total column, then the amount set forth in the item total column for the item shall prevail and shall be divided by the estimated quantity for the item and the price thus.obtained shall be the unit price; (b) (Decimal Errors) If the product of the entered unit price and the estimated quantity is exactly off by a factor of ten, one hundred, etc., or one -tenth, or one -hundredth, etc. from the entered total, the discrepancy will be resolved by using the entered unit price or item total, whichever most closely approximates percentagewise the unit price or item total in the City of San Mateo 's Final Estimate of cost. if both the unit price and the item total are unreadable or otherwise unclear, or are omitted, the bid may be deemed irregular. Likewise if the item total for a lump sum item is unreadable or otherwise unclear, or is omitted, the bid may be deemed irregular unless the project being bid has only a single item and a clear, readable total bid is provided. Symbols such as commas and dollar signs will be ignored and have no mathematical significance in establishing any unit price or item total or lump sums. Written unit prices, item totals and lump sums will be interpreted according to the number of digits and, if applicable, decimal placement. Cents symbols also have no significance in establishing any unit price or item total since all figures are assumed to be expressed in dollars and/or decimal fractions of a dollar. Bids on lump sum items shall be item totals only; if any unit price for a lump sum item is included in a bid and it differs from the item total, the items total shall prevail. The foregoing provisions for the resolution of specific irregularities cannot be so comprehensive as to cover every omission, inconsistency, error or other irregularity which may occur in a bid. Any situation not specifically provided for will be determined in the discretion of the City of San Mateo, and that discretion will be exercised in the manner deemed by the City of San Mateo to best protect the public interest in the prompt and economical completion of the work. The decision of the City of San Mateo respecting the amount of a bid, or the existence or treatment of an irregularity in a bid, shall be final. Qapw\PWENG\ZamminBayfront Levee South \CONTRACT - FINAL\Contract Book - FivalWotiee and Front End - Bayfront.doc 1 1 t 1 1 1 1 1 1 If this proposal shall be accepted and the undersigned shall fail to enter into the contract and furnish the two bonds in the sums required by the Public Contract Code, with surety satisfactory to the City Of San Mateo, within 8 days, not including Saturdays, Sundays and legal holidays, after the bidder has received notice from the City of San Mateo that the contract has been awarded, the City of San Mateo may, at its option, determine that the bidder has abandoned the contract, and thereupon this proposal and the acceptance thereof shall be null and void and the forfeiture of the security accompanying this proposal shall operate and the same shall be the property of the City of San Mateo. By my signature on this proposal, as bidder, declares that the only persons or parties interested in this proposal as principals are those named herein; that this proposal is made without collusion with any other person, firm, or corporation; that he or she has carefully examined the location of the proposed work, the annexed proposed form of contract, and the plans therein referred to; and he or she proposes, and agrees if this proposal is accepted, that he or she will contract with the City of San Mateo, in the form of the copy of the contract annexed hereto, to provide all necessary machinery, tools, apparatus and other means of construction, and to do all the work and furnish all the materials specified in the contract, in the manner and time therein prescribed, and according to the requirements of the Engineer as therein set forth, and that he or she will take in full payment therefor the following prices, as shown on the Schedule of Bid Items. MOP 'FNG\Zammit\D ont Levee South \ CONTRACT - FINAL \Contract Hook - Final\ Notice and Front End - Bay@onLdoc A-6 1 1 I 1 1 1 SCHEDULE OF BID ITEMS (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 ITEM NO. DESCRIPTION OF WORK EST. QTY. UNIT UNIT PRICE TOTAL COST 1 Mobilization and Demobilization 1 LS $ $ 2 Bonds and Insurance 1 LS $ S 3 Pedestrian and Traffic Control 1 LS $ $ 4 Work Planning and Submittals 1 LS $ $ 5 San Mateo Creek Site Work (North) 1 LS $ S 6 San Mateo Creek Site Work (South) I LS $ S 7 Detroit Drive Site Work 1 LS $ S 8 Replacement of Foundation Soil at Floodwalls 4,000 CY $ S 9 Seal Slough Levee Site Work 1 LS $ S 10 Removal of Rubble from Seal Slough Site 200 CY $ S 11 Construction of Cutoff Wall at Seal Slough Site 10,500 SF $ S 12 East End Levee Site Work 1 LS $ S 13 Removal of Rubble from East End Levee 1,000 CY $ $ 14 Reconstruction of East End Levee Fill 1,000 CY $ $ 15 Construction of Cutoff Wall at East End Levee 33,000 SF $ $ 16 Structural Floodwall No. 1 1 LS $ $ 17 Structural Floodwall No. 2 1 LS $ S 18 Structural Floodwall No. 3 1 LS $ $ 19 Structural Floodwall No. 4 1 LS $ $ 20 Structural Floodwall No. 5 1 LS $ $ 21 Structural Floodwall No, 6 1 LS $ $ 22 Structural Floodwall No. 7 1 LS $ $ 23 Structural Floodwall No. 8 1 LS S S 24 Structural Floodwall No. 9 1 LS $ $ 25 Asphalt Concrete Surfacing 1 LS $ $ 26 Re -vegetation 1 LS $ S TOTAL BID $ 1 QdpwVPW HNCAZammitAnayfrom Levee SomhVCONTRACT - FINA(.AContract Hook - FinalANotice and Front End - Hayfront.doc A-7 1 I t 1 SUBCONTRACTING REQUIREMENTS AND LIST OF SUBCONTRACTORS (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 Each bidder acknowledges it is aware and familiar with the requirements related to subletting and subcontracting set forth in Section 2-3 pf the APWA-AGC Standard Specifications, and in the Subletting and Subcontracting Fair Practices Act, commencing with Section 4100 of the Public Contract Code of the State of California. These requirements include a provision that the Contractor shall perform, with its own organization, contract work amounting to at least 50 percent of the contract price. Each bidder in submitting his bid for the doing of the work or improvement shall in his bid or offer, in accordance with the provisions of Section 4104 of the Public Contract Code of the State of California, set forth the following: I . Name and address of the place of business of each subcontractor who will perform work or labor or render service to the general contractor in or about the construction of the work or the improvement in an amount in excess of one-half (1/2) of one percent (1%) of the general contractor's total bid or $10,000, whichever is greater. 2. The specific work and dollaramountof work that will be done by each subcontractor. 3. If no portion of the work is to be subcontracted as provided in item 1, insert the word "none" in the space provided and sign below. NAME ADDRESS SPECIFIC WORK DOLLAR AMOUNT $ $ $ $ $ Contractor's Signature 1 gdptOPWENGAZammitABayfront Levee SotnhVCONTRACT- FINAL AContract Book - FinalNoticc and Front End - Bayfront.dne A-8 1 1 1 1 1 1 1 1 1 1 BIDDER'S STATEMENT SHEET 1 OF 3 (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 The undersigned has carefully read the APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition, and realizes that any variation or deviation from these specifications, requirements and conditions shall be sufficient grounds for rejection of all or any part of the work performed. Such rejected work shall be replaced entirely at the Contractor's expense, and failure to do so within a reasonable length of time shall be sufficient reason for the withholding of payment for any part of or all of, the work and forfeiture of the Contractor's bond. The undersigned further certifies that he or she is licensed by the State of California as a Class A Contractor, that the license is now in force, and that the number is and the expiration date is . Further the undersigned certifies that upon request he or she will provide evidence of said license. Pursuant to Business and Professions Code Section 7028.15 I, , declare under penalty of perjury that the foregoing and the statements contained in the bid for the above titled project are true and correct and that this declaration is made on this day of at , California. The undersigned understands he or she must meet the requirements of Section SP -7-2.3, NON- DISCRIMINATION POLICY prior to award of contract and conform to those guidelines throughout the duration of the contract. It is understood that the quantities set forth herein are approximate only and are to be used only for the comparison of bids and the guidance of the bidder. If awarded the contract, the undersigned hereby agrees to sign and file an agreement, attached as Appendix I, together with the necessary bonds, certificate(s) of insurance, related endorsements for general and automobile liability insurance, and proof of a San Mateo Business License in the office of the City Clerk within eight (8) days, not including Saturdays, Sundays and legal holidays, after the bidder has received notice from the City of San Mateo that the contract has been awarded and to commence work within five (5) days of the date specified in the notice to proceed, and to complete the work under said contract within the specified number of calendar days beginning from the date specified in the notice to proceed. Further, the undersigned agrees to insure that all subcontractors obtain a San Mateo Business License in accordance with Section SP -2-13, SAN MATEO BUSINESS LICENSE GUIDELINES. Contractor and all subcontractors also agree to keep the Business License current for the entire term of the contract. If the unit price and the total amount named by a bidder for any item do not agree, it will be assumed that the error was made in computing the total amount and the unit price alone will be considered as representing the bidder's intention. Unit prices bid must not be unbalanced. Q:Apw'PWE_NGAZatnmitABayfront Levee South VCONTRACT - FINAL AContract Book - FinalANotice and From End - Bayfrontdoc A-9 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 i 1 1 BIDDER'S STATEMENT SHEET 2 OF 3 (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 The undersigned has checked carefully all the figures listed in the Schedule of Bid Items and understands that the City will not be responsible for any errors or omissions on the part of the undersigned in making up this bid. Enclosed find bond or certified check or cashier's check no. of the Bank for . Not less than ten (10) percent of this bid payable to the City of San Mateo, California, and which is given as a guarantee that the undersigned will enter into the contract if awarded to the undersigned. The undersigned agrees that this bid may not be withdrawn for a period of forty-five (45) days after the date set for the opening thereof. NOTE: IF THE PROPOSAL IS MADE BY AN INDIVIDUAL, HIS NAME AND POST OFFICE ADDRESS MUST BE SHOWN. IF THE PROPOSAL IS MADE BY A PARTNERSHIP, THE NAME AND ADDRESS OF EACH MEMBER OF THE FIRM OR PARTNERSHIP MUST BE SHOWN (if more than two members of a firm or partnership, please attach an additional page); OR IF MADE BY A CORPORATION, THE PROPOSAL SHALL SHOW THE NAME OF THE STATE UNDER THE LAWS OF WHICH THE CORPORATION WAS CHARTERED AND THE NAMES, TITLES AND BUSINESS ADDRESSES OF THE PRESIDENT, SECRETARY AND TREASURER OF SAID CORPORATION. Q:\pw\PWENG\Zanunit\Bayfront Levee South \CONTRACT - FINAL \Contract Book - FinaRNoticc and Front End -Bayfrmttdoc A -I0 BIDDER'S STATEMENT SHEET 3 OF 3 (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 SIGNATURES FOR BIDDER: 1 1 1 1 1 1 1 1 1 If INDIVIDUAL, sign below: Signature Date Print name Post Office Address If PARTNERSHIP, sign below (show names of non -signing partners): Signature Date Name of Partner Post Office Address Signature Date Name of Partner Post Office Address (if different) If CORPORATION, sign below (show names of non -signing officers): a CORPORATION Name of State Where Chartered Signature Date Print name of person signing bid Title List names of the following officers: PRESIDENT SECRETARY TREASURER Post Office Address Q:\pwVPWENCAZammitABayfront Levee South ' CONTRACT -FINALVContract Book -FinalANotice and Front End - Bayfrontdoe A -I] NONCOLLUSION AFFIDAVIT (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 State of California SS- County of 1 1 1 1 1 1 1 , being first duly sworn, deposes and says that he or she is of the party making the foregoing bid that the bid is not made in the interest of, or on behalf of, or any undisclosed person, partnership, company, association, organization, or corporation; that the bid is genuine and not collusive or a sham; that the bidder has not directly or indirectly induced or solicited any other bidder to put in a false or sham bid, and has not directly or indirectly colluded, conspired, connived, or agreed with any bidder or anyone else to put in a sham bid, or that anyone shall refrain from bidding; that the bidder has not in any manner, directly or indirectly, sought by agreement, communication, or conference with anyone to fix the bid price, or of that of any other bidder, or to secure contract; that all statements contained in the bid are true; and, further, that the bidder has not, directly or indirectly, submitted his or her bid price or any breakdown thereof, or the contents thereof, or divulged information or data relative thereto, or paid, and will not pay, any fee to any corporation, partnership, company association, organization, bid depository, or to any member or agent thereof to effectuate a collusive or sham bid. Note: The above affidavit is part of the Proposal. Signing this Proposal on the signature portion thereof shall also constitute signature of this affidavit. Q1pw\PWENG\ZammiOBayfrotn Levee South \ CONTRACT - FINAL \Contract Book - FindI\Notice and Front End - Bayfrontdoe A-72 1 1 1 1 1 1 1 I CERTIFICATION OF NON-DISCRIMINATION (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 On behalf of the bidder making this proposal, the undersigned certifies that there will be no discrimination in employment with regard to race, color, religion, sex, disability, or national origin; that all federal, state, local directives, and executive orders regarding non-discrimination in employment will be complied with; and that the principle of equal opportunity imemployment will be demonstrated positively and aggressively. BIDDER By: (Name and title of person making certification) Date Q'.ApwVPWENGAZammitADayfront Levee South CON MACE- PINALAContract Book - FinalA Notice and Front End - Daybont.doc A-13 1 I 1 1 1 11 1 1 e 1 1 CERTIFICATION OF PAYMENT OF PREVAILING WAGE SCALE (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 On behalf of the bidder, the undersigned certifies that the Prevailing Wage Scale, as determined by the Director of Industrial Relations of the State of California, in force on the day this bid was announced, will be the minimum paid to all craftsmen and laborers working on this project. hi some cases, prevailing wage determinations have either a single asterisk (*) or double asterisks (**) after the expiration date. In cases where the prevailing wage determinations have a single asterisk (*) after the expiration date which are in effect on the date of advertisement for bids, such determinations remain in effect for the life of the project. Prevailing wage determinations which have double asterisks (**) after the expiration date indicate that the basic hourly wage rate, overtime, and holiday pay rates, and employer payments to be paid for work performed after this date have been predetermined. If work is extended past this date, the new rate must be paid and should be incorporated in contracts the Contractor enters into. A copy of the correct determination will be posted at the job site. It is understood that it is the responsibility of the bidder to determine the correct scale. The City will keep a copy of the wage scale in the City Clerk's office for the convenience of bidders. Any errors or defects in the materials in the City Clerk's office will not excuse a bidder's failure to comply with the actual scale then in force. The undersigned understands that weekly certified payrolls must be submitted for verification. BIDDER By: (Name and title ofperson making certification) Date Questions shall be addressed to: Q:yFwvF Department of Labor Relations Division of Labor Statistics and Research Prevailing Wage Unit 45 Fremont Street, Suite 1160 P. O. Box 420603 San Francisco, CA 94142-0603 nmmit\Bayfont Levee South \ CONTRACT - FINAL \Contract Book - FinaLNotice and Front End - Bayfrontdoc A -I4 CERTIFICATION OF REQUIREMENT TO PAY WORKERS' COMPENSATION (To be submitted with Proposal Form) BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 1 1 1 1 1 1 1 1 I am aware of the provisions of Section 3700 of the Labor Code that require every employer to be insured against liability for workers', compensation or to undertake self-insurance in accordance with the provisions_ of that code, and I will comply with such provisions before commencing the perfonnance of the work of this contract. BIDDER By: (Name and title of person making certification) Date Q:rpwVl'W FNGAZammilABayfont Levee Soitl,ACONTRACT - FINAL AContract Book - EinarNotice and Front End - Baytrom.doc A -i5 SPECIAL PROVISIONS CITY OF SAN MATEO, CALIFORNIA BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 11 1 1 1 1 1 The work embraced herein shall be done according to the Public Works Standards Inc., Standard Specifications for Public Works Construction, 2009 Edition (also known as the "Greenbook" and hereinafter referred to as the Standard Specifications), and according to these Special Provisions. The Standard Specifications are in all other respects incorporated into and are a part of the contract, except where they conflict with these Special Provisions. The Special Provisions shall govern in lieu of conflicting provisions of the Standard Specifications, but shall in no way nullify nonconflicting portions of the Standard Specifications. The Technical Provisions shall govern in lieu of conflicting provisions of the Special Provisions or Standard Specifications, but shall in no way nullify nonconforming portions of the Special Provisions or Standard Specifications. Whenever the letters SP are used as a prefix in section numbering (e.g., SP -200-2) the sections so designated are in these Special Provisions and refer to modifications or additions to sections in the Standard Specifications which have the same first numbers (e.g., 200-2). PART 1 - GENERAL PROVISIONS SP -2-1 AWARD OF CONTRACT. Special Provision 2-1 replaces Section 2-1 of the Standard Specifications. The right is reserved to reject any and all proposals. The award of contract, if it be awarded, will be to the lowest responsible prequalified bidder whose proposal complies with all the requirements prescribed or has demonstrated, to the satisfaction of the City, adequate good faith efforts to do so. In determining the award, careful consideration by City shall be given to each item of bid. All bids will be compared on the basis of the Engineer's Estimate of the quantities of work to be done. The City reserves the right to amend or reject any or all proposals and also to select, modify, or reject any of the bid items as City see in its best interest. Such award, if made, will be made within 45 days after the opening of the proposals. This period will be subject to extension for such further period as may be agreed upon in writing between the Department and the bidder concerned. Any protests to award of contract shall follow the procedures outlined in City Council Resolution No. 61, dated June 2, 2004. SP -2-3 SUBCONTRACTS. Special Provision 2-3.4 is added to Section 2-3 of the Standard Specifications. The Contractor is prohibited from employing any subcontractor that is ineligible under Labor Code section 1777.1. SP -2-4 CONTRACT BONDS. Special Provision 2-4 replaces Section 2-4 of the Standard Specifications. fj:'ywVPWCNGAZammittbayfront Levee South VCON TRACT' - FINALACuntrwi Hook - Final ANotice and Front End - Hayfront.doe A -I6 1 1 1 1 I 1 1 1 1 1 1 Before execution of the Contract by the City, the Contractor shall file with the City surety bonds satisfactory to the City in the amounts and for the purposes noted below. Bonds shall be duly executed by a responsible corporate Surety, authorized to issue such bonds in the State of California and secured through an authorized agent with an office in California. The Contractor shall pay all bond premiums, costs, and incidentals. Each bond shall be signed by both the Contractor and Surety and the signature of the authorized agent of the Surety shall be notarized. The Contractor shall provide two acceptable surety bonds; one for labor and materials and one for performance. The "Payment Bond" (Material and Labor Bond) shall be for not less than 100 percent of the contract price, to satisfy claims of material suppliers and of mechanics and laborers employed by it on the work. The bond shall be maintained by the Contractor in full force and effect until the completed work is accepted by the Agency, and until all claims for materials and labor are paid, and shall otherwise comply with the Civil Code. The "Faithful Performance Bond" shall be for 100 percent of the contract price to guarantee faithful performance of all work, within the time prescribed, in a manner satisfactory to the City, and that all materials and workmanship will be free from original or latent developed defects. SP -2-4.1 GUARANTEE. Special Provision 2-4.1 is added to Section 2-4 of the Standard Specifications. The Contractor warrants and guarantees that all materialandequipment used or furnished and all workmanship are of the type and quality specified herein. The Contractor further guarantees that any latent fault in construction or defective material discovered within one year after acceptance of the work shall be remedied by him without cost to the City, upon written notice given to him. Other subsequent latent defects shall be covered by responsibilities set forth in the law. In the event of failure to comply with the above -mentioned conditions within a reasonable time after notice, the City will have the defects repaired and made good at the expense of the Contractor, who agrees to pay the costs and charges therefore immediately upon demand. The signing of the agreement by the Contractor shall constitute execution of the above guarantees. The Faithful Performance Bond shall remain in full effect during the guarantee period and will not be released until the expiration of such period. SP -2-5.1.1 PLANS AND SPECIFICATIONS. Special Provision 2-5.1.1 is added to Section 2- 5.1 of the Standard Specifications. The plans for this project are as follows: CONTRACT PLANS Title Drawing No. Bayfront Levee Improvements: San Mateo Creek to Foster City Limit; City Project No. 468301-46000-0553 2-20-40 Q:\pwWWENG\ZaminOkBaylkont Levee South CONTRACT - FINALVComn¢I Book - Final and Froni End - Rayfonidoc A-1? 1 1 1 1 1 1 1 1 I 1 SP -2-5.3.1 SUBMITTALS. Special Provision 2-5.3.1.1 is added to Section 2-5.3.1 of the Standard Specifications. The Contractor is required to provide shop drawings and/or submittals for the items listed in Table SP -2-5-3.1(A). Contractor's submittals shall be complete and responsive to the requirements of the specifications. Incomplete submittals may delay the review process. The impact to the construction schedule of such delays shall be the responsibility of the Contractor. No field work shall be performed by the Contractor until shop drawings or submittals related to that field work have been designated as "accepted" by the City. Allow a minimum of 10 working days for review time. SP -2-5.3.1(A) TABLE OF SUBMITTALS. Table 2-5.3.1(A) is added to Section 2-5.3.1 of the Standard Specifications. ITEM SECTION NUMBER TITLE SUBMITTAL(S) SUBMITTALS DUE 1. SP 2-5.3.2 Working Drawings Record Drawings Following completion of work, but prior to acceptance of project 2. SP 6-1.4 Construction or Fabrication and Delivery Schedule Construction Schedule At pre -construction meeting 3. SP -7.2.3.3 Certificate of Non- Discrimination Certificate of Non - Discrimination Before contract approval 4. SP 7-2.4 Prevailing Wage Certified Payroll Weekly 5. SP 7-3 Liability Insurance Certificates of Insurance Before contract approval and with any changes/updates 6. SP 7-8.6 Water Pollution Control Stormwater Pollution Prevention Program 60 days before disturbing any site 7. SP 7-10.1 Traffic and Access Traffic control plan Before beginning work 8. SP 7-10.5 Notifications Notification letters to be used At pre -construction meeting 9. 01010-1.02 Summary of Work Work Plan At pre -construction meeting 10. 01025-1.05 Measurement and Payment Schedule of Values At pre -construction meeting 11. 01047-1.02 Utility Coordination Utility Protection Plan Within 21 days of Notice to Proceed 12. 01120-1.03 Hazardous Materials Conditions and Procedures Site -Specific Health and Safety Plan Within 21 days of Notice to Proceed; amendments as they occur 13' 01600-2.01, 2.02, 2.03 Environmental Protection ESA fence, silt fence and floating turbidity curtain product data 30 days before installation 14. 02260-1.06 Excavation Support and Protection Shoring and dewatering plans 30 days before excavation 15. 02279-1.03 Concrete Block Revetment Cellular concrete interlocking block product data 30 days before installation 16. 02300-1.05 Earthwork Stockpile management and dewatering plans Before beginning work 17. 02300-1.05 Earthwork Material sources, gradation and testing data for imported and on -site materials 30 days before importation or use of material Q]pwVP W ENGVZammitABnyfront Levee South VCOVER ACT - FINAL \ Contract Book - Final\Notice and Front End - Bayfront.doc A -t8 1 1 1 1 1 1 1 ITEM SECTION NUMBER TITLE SUBMITTAL(S) SUBMITTALS DUE 18. 02325-1.05 Soil-Bentonite Slurry Cutoff Walls (Sub)contractor experience summary, work plan At pre -construction meeting 19. 02325-1,05 Soil-Bentonite Slurry Cutoff Walls Material and mix data, excavation plan. equipment list 30 days before installation 20. 02330-1,03 Sheet Pile Cutoff Walls (Sub)contractor experience summary, work plan At pre -construction meeting 21. 02330-1.03 Sheet Pile Cutoff Walls Material data, excavation plan, equipment list 30 days before installation 22. 02622-1.05 Filter Fabrics and Geotextiles Filter fabric, geotextile, and geogrid product data 30 days prior to use 23. 02700-1.04 HDPE Pipe and Fittings HDPE pipe and fitting product data 30 days prior to use 24. 02722-1.03 Aggregate Base Course Source, gradation and test data. Certificates of compliance. 30 days prior to use 25. 02725-1.03 Decomposed Granite Source, gradation, mix design and test data; 2 lb. sample 30 days prior to use 26. 02742-1.05 Asphaltic Concrete P Paving Sources, mix design, gradation, quality control, equipment list 30 days prior to paving 27. U2750-1 _U2 Elastomeric Check Valves Product literature and shop drawings 30 days before installation 28. 02830-1.04 Chain Link Fencing Product data and shop drawings 30 days before installation 29. 02925-3.03 Topsoil Preparation Soil suitability test report 30 days after completion of grading activities 30. 02955-1.04 Seeding Seeding mixes 30 days before beginning seeding 31. 02742-1.05 Pavement Restoration Mix designs Before restoring damaged AC pavement 32. 03071-1.04 Epoxies Product data and installation instructions 30 days before installation 33. 03102-1.04 Concrete Formwork Formingsystemdata 30 days before installation 34. 03150-1.03 Concrete Accessories Project data and installation instructions 30 days before installation 35. 03200-1.04 Concrete Reinforcement Shop drawings Sample of bar supports 30 days before installation 36. 03300-1.05 Cast -in -Place Concrete Material source and testing data on fine and coarse aggregate, concrete mixes and curing compounds; gradations; test cylinder data 30 days prior to first pour 37. 03400-1.04 Precast Concrete Product data 30 days before installation 38. 03600-1.03 Grouts Product data 30 days prior to first use 39. 05500-1.04 Metal Fabrications Shop drawings for guard rails and fixed ladders 30 days before installation 40. 09960-1.05 Coatings Product data and color samples 30 days before coating SP -2-6 WORK TO BE DONE. Special Provision 2-6 replaces Section 2-6 of the Standard Specifications. Q:'vpwWWENGAZammitABay[ront Levee Son[hVCONTRACr-FINALAConhact nook- finalANotice and Front End - Bayfronldoc A -I9 The Contractor shall perform all work necessary to complete the contract in a satisfactory manner. Unless otherwise provided, the Contractor shall furnish and install all materials, equipment, tools, labor, and incidentals necessary to complete the work. The work to be performed under this contract shall generally include, but not be limited to, the following: 1 1 1 1 1 1 1 Perform necessary clearing, grubbing and demolition of existing structures; construct new structural floodwalls and appurtenances; place and compact engineered fill to the elevations and cross sections shown; install below -grade soil-bentonite slurry or vinyl sheet pile cutoff walls as shown; seed levee slopes as shown and specified; repave a bicycle/pedestrian path; restore all work sites as specified. SP -2-6.1 EXAMINATION OF THE SITE. Special Provision 2-6.1 is added to Section 2-6 of the Standard Specifications. The bidder shall examine carefully the site of the work contemplated, the plans and specifications, and the proposal and contract forms therefor. The submission of a bid shall be conclusive evidence that the bidder has investigated and is satisfied as to the conditions to be encountered, as to the character, quality and scope of work to be performed, the quantity of materials to be furnished and as to the requirements of the proposal, plans, specifications and contracts. The bidder represents that he or she is fully qualified to perform this examination and review. If the bidder determines that any portion of the site or the plans and specifications present any interpretation problems of any kind, the bidder shall note such a determination upon this bid form. Failure to note any such determination shall be conclusive evidence of acceptance by the bidder of the sufficiency of the plans and specifications. SP -2-9 SURVEYING. Special Provisions 2-9.1 and 2-9.2 replace Sections 2-9.1 and 2-9.2 of the Standard Specifications. SP -2-9.1 PERMANENT SURVEY MARKERS. The Contractor shall notify the Engineer. at least seven (7) days before starting work to allow for the preservation of survey monuments, lot stakes (tagged), and bench marks. The Contractor shall not disturb survey monuments, lot stakes (tagged), or bench marks without the consent of the Engineer. The Contractor shall bear the expense of replacing any permanent survey markers that are disturbed without permission. When a change is made in the finished elevation of the pavement of any roadway in which a permanent survey monument is located, the Contractor shall adjust the monument cover to the new grade within seven (7) days of finished paving unless otherwise specified. SP -2-9.2 SURVEY SERVICE. Staking of line and grade will be done by the City survey crew at no cost to the contractor once only. The Contractor shall notify the City 48 hours in advance when requesting construction stakes. Resetting of survey stakes lost due to the contractor's negligence (including loss due to vandalism) will be charged to the contractor at the rate set out in the City's Comprehensive Fee Schedule per man per hour or fraction thereof. The Engineer will be the judge of what constitutes negligence. Any appeal of this decision will be referred to the Public Works Commission. The Public Works Commission decision will exhaust the administrative procedures for appeal. Q:ApwVPWENGAZamm¢ABay&oni Levee SumCONTRACTFINAL AContract Book - FinaANotice and Front End - Bayfrontdoc A-20 1 1 1 1 I 1 1 1 1 1 1 t SP -2-12 ATTORNEY FEES. Special Provision 2-12 is added to Section 2 of the Standard Specifications. Attorney fees in amount not exceeding $85 per hour per attorney, and in total amount not exceeding $5,000, shall be recoverable as costs (that is, by the filing of a cost bill) by the prevailing party in any action or actions to enforce the provisions of this contract. The above $5,000 limit is the total of attorney fees recoverable whether in the trial court, appellate court, or otherwise, and regardless of the number of attorneys, trials, appeals or actions. It is the intent that neither party to this contract shall have to pay the other more than $5,000 for attorney fees arising out of an action, or actions, to enforce the provisions of this contract. The parties expect and hope there will be no litigation and that any differences will be resolved amicably. SP -2-13 SAN MATEO BUSINESS LICENSE GUIDELINES. Special Provision 2-13 is added to Section 2 of the Standard Specifications. A business license shall be obtained as required by the San Mateo Municipal Code, Chapter 5. • Section 5.24.090 of said Chapter 5 provides that "Every person conducting the business of contractor shall pay an annual tax as follows: (1) General Contractor, $124.00; (2) all other contractors, $49.00." SP -3-1.3 NOTICE OF POTENTIAL CLAIM. Special Provision 3-1.3 is added to Section 3-1 of the Standard Specifications. The Contractor shall not be entitled to the payment of any additional compensation for any cause, including any act, or failure to act, by the Engineer, or the happening of any event, thing or occurrence, unless he or she shall have given the Engineer due written notice of potential claim as hereinafter specified, provided, however, that compliance with this Section SP -3-1.3 shall not be a prerequisite as to matters within the scope of the Protest Provision in Section 6-7, "Time of Completion," in the Standard Specifications, nor to any claim which is based on differences in measurements or errors of computation as to contract quantities. The written notice of potential claim shall set forth the reasons for which the Contractor believes additional compensation will or may be due, the nature of the costs involved, and, insofar as possible, the amount of the potential claim. The said notice as above required must have been given to the Engineer prior to the time that the Contractor shall have performed the work giving rise to the potential claim for additional compensation, if based on an act or failure to act by the Engineer, or in all other cases within 15 days after the happening of the event, thing or occurrence giving rise to the potential claim. It is the intention of this Section that differences between the parties arising under and by virtue of the contract be brought to the attention of the Engineer at the earliest possible time in order that such matters may be settled, if possible, or other appropriate action promptly taken, The Contractor hereby agrees that he or she shall have no right to additional compensation for any claim that may be based on any such act, failure to act, event, thing or occurrence for which no written notice of potential claim as herein required was filed. SP -3-2.1 CHANGES INITIATED BY THE AGENCY. Special Provision 3-2.1 replaces Section 3-2.1 of the Standard Specifications. Q:Apw'PWBNGyZammihAtlayfront Levee South A CONTRACT - FINALA Contract Book - FinalA Notice and Front bud - Bavfront.dne A-21 1 1 1 1 1 1 1 1 1 1 1 The City of San Mateo reserves the right to change the scope of this contract in order to align the contract price to the monies available. The City shall have full authority and discretion to determine the decrease or increase in quantities required as well as the sub -projects that will be altered, added or deleted. The Contractor shall not be entitled to any additional compensation or adjustment in the unit prices bid because of the above -stated alteration of this project. SP -3-3.1 EXTRA WORK. Special Provision 3-3.1 replaces Section 3-3.1 of the Standard Specifications. New or unforeseen work will be classified as "extra work" when the Engineer determines that it is not covered by contract unit prices or stipulated unit prices. When the price for the extra work cannot be agreed upon, the City will pay for the extra work based on the accumulation of costs as provided in Section 3-3, Extra Work, of the Standard Specifications. The mark-ups shall be as specified below. SP-3-3.2.2(a)(i) LABOR SURCHARGE. Special Provision 3-3.2.2(a)(i) is added to Section 3- 3.2.2(a) of the Standard Specifications. To the actual wages as defined in Section 3-3.2.2(a) of the Standard Specifications for Public Works Construction, will be added a labor surcharge. The labor surcharge compensates the contractor for statutory payroll items stipulated by various governmental agencies. The six items included are Workers Compensation, Social Security, Medicare, Federal Unemployment, State Unemployment and State Training Taxes. The labor surcharge calculation for overtime work does not include workers compensation on the premium portion of, overtime, as provided by workers compensation regulations. The surcharge percentage to be applied to the actual wages paid as provided in Section 3.3.2.2(a) of the Standard Specifications for Public Works construction will be 16 percent for regular time (RT) and 14 percent for over time (OT). SP -3-3.2.3 MARK-UP. Special Provision 3-3.2.3 replaces Section 3-3.2.3 of the Standard Specifications. A. Work by Contractor The following percentages shall be added to the Contractor's cost and shall constitute the mark-up for all overhead and profits: I . Labor Surcharge (RT) 16% 2. Labor Surcharge (OT) 14% 3. Labor 25% 4. Materials 15% 5. Equipment Rental 15% 6. Other Items and Expenditures 15% To the sum of the costs and mark-ups provided for in this subsection, one percent (1%) shall be added as compensation for bonding. Q?pwVPWENGAZammitABayfroni Levee South VCONTRACT - F[NALAContract Book - FinalNotice and Front End- Bayfront.doc A-22 I 1 1 1 1 1 1 B. Work by Subcontractor When subcontractor performs all or any part of the extra work, the markup established in SP -3-3.2.3(a) shall be applied to subcontractor's cost as determined under 3-12.2. In addition. a markup of 10 percent on first $5,000 of subcontracted portion of extra work and 5% on the work added in excess of $5,000 of subcontracted portion of extra work may be added by the contractor for overhead and profit. SP -5-1.1 LOCATION OF UTILITIES. Special Provision 5-1.1 is added to Section 5-1 of the Standard Specifications. The Contractor's attention is directed to Section 5-1 of the specifications for Public Works Construction regarding the Contractor's responsibility for requesting utility companies' representatives to mark or otherwise indicate the location of their respective underground installations. At least forty-eight (48) hours prior to commencing work, the Contractor shall notify Underground Service Alert (USA) so that the various utility companies may field -mark said installations. Once the field marks are in place, the Contractor shall be responsible for all marked utilities damaged during construction or claims resulting from said damage. In addition, the City shall not be responsible for any unmarked utility damaged during construction or any claims resulting from this damage, except for damage to City of San Mateo utilities that the City has not marked within forty-eight (48) hours after receiving notice from USA to do so and which were not marked at the time the damage occurred. Attention is directed to the possible existence of underground utilities not indicated on the plans and to the possibility that underground utilities may be in a location different from that which is indicated on the plans. The Contractor shall ascertain the exact location of undergroundutilities whose presence is indicated on the plans, the location of their service laterals or other appurtenances, and for existing service lateral or appurtenances of any other underground facilities which can be inferred from the presence of visible facilities such as buildings, meters and junction boxes prior to doing work that may damage any such facilities or interfere with their service. SP -6-1.2 COMMENCEMENT OF WORK. Special Provision 6-1.2 replaces Section 6-1.2 of the Standard Specifications. The Contractor shall begin work within 5 calendar days after receiving notice to proceed and shall diligently prosecute the same to completion with the time limits provided in the special provisions. SP -6-1.3 PRE -CONSTRUCTION CONFERENCE. Special Provision 6-1.3 is added to Section 6-1 oftheStandard Specifications. A pre -construction conference will be held at a location selected by the City for the purposes of review and approval of said schedule and to discuss construction procedures and payment schedule. The Contractor shall be represented by his superintendent of work. The City will be represented by members of the organization having direct control over supervision of the project. SP -6-1.4 CONSTRUCTION OR FABRICATION AND DELIVERY SCHEDULE. Special Provision 6-1.4 is added to Section 6-1 of the Standard Specifications. Q: pwW WENG\Zanunit\Hayfrotn Levee South\CONTRACT - FINAL\Contract Book - Final \Notice and Front End - Bayfront.doc A-23 After notification of award and prior to start of any work, the Contractor shall submit to the Engineer for approval its proposed construction or fabrication and delivery schedule. The schedule shall be in the form of a tabulation, chart, or graph and shall be in sufficient detail to show the chronological relationship of all activities of the project including, but not limited to, estimated starting and completion dates of various activities, submittal of shop drawings to the Engineer for approval, procurement of materials, scheduling of equipment, and delivery of finished product. SP -6-6.5 DELAYS AND EXTENSIONS OF TIME. Special Provision 6-6.5 is added to Section 6-6 of the Standard Specifications. In the event that a disagreement shall arise between the City and the Contractor over Time of Performance as extended by the City due to an allowed suspension of work, the Contractor may request an extension from the City Council. Such requests shall be filed with the City Clerk, addressed to the City Council, at least twenty (20) days prior to the expiration of the Time of Performance as modified. The ruling of the City Council shall be final and conclusive. SP -6-7 TIME OF COMPLETION. Special Provision 6-7.1 replaces Section 6-7.1 of the Standard Specifications. The Contractor shall prosecute and work to completion before January 31, 2012. No extensions of time will be granted for adverse weather conditions. SP -6-7.2.1 WORKING HOURS. Special Provision 6-7.2.1 is added to Section 6-7.2 of the Standard Specifications. Construction shall be allowed only between the hours of eight (8:00) a.m. and five (5:00) p.m. Monday through Saturday unless otherwise approved in writing by the Director of Public Works. Construction work shall not be allowed on the following holidays, unless otherwise approved in writing by the Director of Public Works. January 1 Martin Luther King's Birthday Presidents' Day Memorial Day Observed Independence Day Labor Day Veteran's Day Thanksgiving Day Day after Thanksgiving Christmas Eve Christmas Day The Contractor shall be responsible for any inspection and additional administration costs incurred by the City, or its agents and representatives, for work by the Contractor outside the hours defined above, or any work on Sundays or holidays recognized by the City. Such costs shall be withheld from the succeeding monthly progress payment. Any work specifically required to be performed outside the normal working hours is excluded from the provisions of this paragraph. The Contractor shall notify the City's Representative at least 24 hours prior to any work outside the normal working hours defined above, on Sundays, of holidays. Q:Apw\PWFNGAZammirABayfront Levee SouthACONTRACT- FMALAContract Rook - Final\Notice and Front End- Bayfront.doc A-24 1 1 1 1 1 1 1 1 SP -6-9 LIQUIDATED DAMAGES. Special Provision 6-9 replaces Section 6-9 of the Standard Specifications. Failure of the Contractor to complete the work within the time allowed will result in damages being sustained by the City of San Mateo. Such damages will be determined on the following basis. For each consecutive calendar day in excess of the time specified for completion of the work (as adjusted), the Contractor shall pay to the City of San Mateo, or have withheld from monies due it, the sum of the amount necessary to cover any add-on costs or lost revenue and by cost plus an estimate of overhead costs incurred by the City; e.g., inspection and administrative costs, loss of revenueor the cost of alternative services during delay, etc. Execution of the contract under these specifications shall constitute agreement by the City of San Mateo and Contractor that $500 per day is the minimum value of the costs and actual damage caused by failure of the Contractor to complete the work within the allotted time, that liquidated damages shall not be construed as a penalty, and that the amount calculated by the City may be deducted from payments due the Contractor if such delay occurs. SP -6-11 MEDIATION. Special Provision 6-11 is added to Section 6 of the Standard Specifications. Should any dispute arise out of this Agreement, any party may request a meeting between the parties to resolve the dispute. Only in the event the dispute is not resolved as a result of such a meeting, or the opposing party refuses to attend such a meeting, any party may request that it be submitted to mediation. The parties shall mediate the dispute within 30 days of such a request. The mediator shall be agreed to by the mediating parties: in the absence of an agreement, the parties shall each submit one name from the mediators listed by the American Arbitration Association, the California State Board of Mediation and Conciliation, or other agreed -upon service. The mediator shall be selected by a "blindfolded" process. The cost of mediation shall be borne equally by the parties. Neither party shall be deemed the prevailing party. No party shall be permitted to file a legal action without first meeting in mediation and making a good faith attempt to reach a mediated settlement. The mediation process, once commenced by a meeting with the mediator, shall last until agreement is reached by the parties but not more than 60 days, unless the maximum time is extended by the parties. SP -7-2.2.1 HOURS OF LABOR. Special Provision 7-2.2.1 is added to Section 7-2.2 of the Standard Specifications. Construction operations beyond the eight -hour normal workday (defined as Monday. through Saturday) and on legal holidays may occur on occasion if approved in advance by the City. The Contractor shall notify the Deputy Director in writing twenty-four (24) hours prior to any non -emergency type overtime operations or forfeit the sum of the job inspector's pay per day (or prorated portion thereof) for overtime work without written consent of the Deputy Director — said sum to he deducted from any monies due the Contractor or paid directly to him. Normal working hours for this project shall be between 8:00 a.m. and 5:00 p.m. unless specifically modified in writing. SP -7-2.3 NON-DISCRIMINATION POLICY. Special Provision 7-2.3 is added to Section 7-2 of the Standard Specifications. Q:ApwVPWBNGAZammitABayfront Levee South VCONTRACT - FINALAConnact Book - Final ANotice and Front End - Eayfronldoc A-25 1 1 1 1 1 1 1 1 It is the policy of the City of San Mateo that all qualified persons are to be afforded equal opportunities of employment on any public works contract entered into with the City. SP -7-2.3.1 LOWEST RESPONSIBLE BIDDER. In order to promote the policy declared above, contracts for public works will be awarded only to such bidders as are determined to meet the following qualifications of lowest responsible bidder. The lowest responsible bidder shall be the bidder who offers to perform the work involved according to the plans and specifications therefore for the least amount of money; provided the bidder has the ability, capacity and, when necessary and the required State or other license. In determining to whom the award is to be made, the awarding authority may consider, in addition to the bid or quotation received, the experience of the bidder for the particular service sought, the quality of work that the bidder has done, the quality of the product or materials provided by the bidder, the ability of the bidder to complete the project in a timely manner, the safety compliance record of the bidder, and the insurance carried by the bidder. SP -7-2.3.2 STANDARDS OF NON-DISCRIMINATION. Special Provision 7-2.3.2 is added to Section 7-2 of the Standard Specifications. A. The successful bidder and each subcontractor shall undertake action to ensure that applicants and employees are treated fairly such that the principles of equal opportunity in employment are demonstrated positively and aggressively during employment, without regard to race, color, religion, sex, disability, or national origin. B. In all advertisements for labor or other personnel or requests for employees of any nature, the successful bidder and each subcontractor shall state that all qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin. SP -7-2.3.3 CERTIFICATION OF NON-DISCRIMINATION. Special Provision 7-2.3.3 is added to Section 7-2 of the Standard Specifications. Each bidder on any public works contract shall sign the certification of nondiscrimination, which is a part of the proposal form. Each subcontractor shall, prior to entering into a contract with any successful bidder, execute and file with the City a certificate of nondiscrimination. SP -7-2.4 PREVAILING WAGE. Special Provision 7-2.4 is added to Section 7-2 of the Standard Specifications. In general, the prevailing wage scale, as determined -by the Director of Industrial Relations of the State of California, in force on the day this bid was announced, will be the minimum paid to all craftsmen and laborers working on this project. In some cases, prevailing wage determinations have either a single asterisk (*) or double asterisks (**) after the expiration date in effect on the date of advertisement for bids. In cases where the prevailing wage determinations have a single asterisk (*) after the expiration date which are in effect on the date of advertisement for bids, such determinations remain in ENGtZammirBayfront Levee SoulliVCONTRACT;FINAL AContract Book - FinalANotice and Front End-BayfronLdoc A-26 I 1 1 1 I 1 1 1 1 1 1 effect for the life of the project. Prevailing wage determinations which have double asterisks (**) after the expiration date indicate that the basic hourly wage rate, overtime, and holiday pay rates, and employer payments to be paid for work performed after this date have been predetermined. If work is extended past this date, the new rate must be paid and should be incorporated in contracts the Contractor enters into. A copy of the correct determination will be posted at the job site. It is understood that it is the responsibility of the bidder to determine the correct scale. The City will keep a copy of the wage scale in the City Clerk's office for the convenience of bidders. Any errors or defects in the materials in the City Clerk's office will not excuse a bidder's failure to comply with the actual scale then in force. The Contractor and each subcontractor shall comply with the provisions of Labor Code Section 1776 and keep accurate payroll records, showing the name, address, social security number, work classification, straight time and overtime hours worked each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker, or other employee employed by him or her in connection with the public work. SP -7-2.5 EMPLOYMENT OF APPRENTICES. Special Provision SP -7-2.5 is added to Section 7-2 of the Standard Specifications. Contractor shall be responsible for compliance with California Labor Code Section 1777.5 relating to employment of apprentices for all apprenticeable occupations when the contract amount exceeds $30,000 or 20 working days or both. SP -7-3 LIABILITY INSURANCE. The minimum insurance requirements set in Special Provision 7-3 replace the minimum requirements in Section 7-3 of the Standard Specifications. The Contractor shall provide and maintain: A. Commercial General Liability Insurance, occurrence form, with a limit of not less than $5,000,000 each occurrence. If such insurance contains a general aggregate limit, it shall apply separately to this Agreement or be no less than two (2) times the occurrence limit. Automobile Liability Insurance, occurrence form, with a limit of not less than $1,000,000 each occurrence. Such insurance shall include coverage for owned, hired, and non -owned automobiles. C. Workers Compensation in at least the minimum statutory limits. D. General Provisions for all insurance. All insurance shall: 1. Include the City of San Mateo, its elected and appointed officials, employees, and agents as additional insureds with respect to this Agreement and the performance of services in this Agreement. The coverage shall contain no special limitations on the scope of its protection to the above -designated insureds. 2. Be primary with respect to any insurance or self-insurance programs of City, its elected and appointed officials, employees, and agents. Q:Apw\FWENGAZammrt\Bayfronm Levee SoutltACGNTRACT - FINAD,Contract Book - Final Notice and Front End - Bavfrontdoc A-27 1 1 1 1 1 1 1 Be evidenced, prior to commencement of services, by properly executed policy endorsements in addition to a certificate of insurance. a. In addition to requiring that you provide an insurance certificate showing the levels and types of coverage required for your project or contract, the City of San Mateo also requires you to provide the City with a copy of the actual endorsements to the commercial general, automobile, and any excess liability insurance policies that show that the City of San Mateo, its elected and appointed officials, employees and agents have been named as additional insureds by the insurers. These endorsements are required because California Insurance Code § 384 expressly provides that an insurance certificate is not proof of what the underlying insurance policy actually contains. If you look at an insurance certificate, you will notice that the certificate actually says the same thing. Therefore, a certificate has minimal legal value and the City cannot be reasonably certain that it is covered under the policies shown on the certificate without endorsements. An endorsement is a piece of paper that modifies the terms of the underlying policy and is issued by the insurance company itself, rather than a broker. A copy of a sample endorsement for commercial general liability is on the following page for your reference. 4. No changes in insurance may be made without the written approval of the City Attorney's office. 5. NOTICE OF CANCELLATION: The City requires 30 days written notice of cancellation. Additionally, the notice statement on the certificate should not include the wording "endeavor to" or "But failure to mail such notice shall impose no obligation or liability of any kind upon the company, its agents or representatives". Q:ApwVPW ENG`'Zammit\Bayfrom Levee South V CONTRACT - FIN AL\Contract Book - Final A Notice and Front End- Bayfrontdoc A-28 1 I I 1 I 1 1 1 i 1 1 SAMPLE ENDORSEMENT POLICY NUMBER: XXXXXXXXX THIS ENDORSEMENT CHANGES THE POLICY, PLEASE READ IT CAREFULLY. ADDITIONAL INSURED - OWNERS, LESSEES OR CONTRACTORS (FORM B) This endorsement modifies insurance provided under the following: COMMERCIAL GENERAL LIABILITY COVERAGE PART AUTOMOBILE LIABILITY COVERAGE PART SCHEDULE Name of Person or Organization: The City of San Mateo, its elected and appointed officials, employees and agents are named as additional insured. Q:\pw\PWENG\Zanilnit\Bayfront levee SouthVCONTRACT - FINAL AContract Book - Notice and Front End - Baylont.doc A-29 1 1 1 1 1 1 SP -7-3.2 HOLD HARMLESS AND INDEMNITY PROVISION. Special Provision 7-3.1 is added to Section 7-3 of the Standard Specifications. Contractor agrees to hold harmless and indemnify City of San Mateo, its elected and appointed officials, employees, and agents from and against any and all claims, loss, liability, damage, and expense arising from performance of this contract, including claims, loss, liability, damage, and expense caused or claimed to be caused by passive negligence of City of San Mateo, its elected and appointed officials, employees, and agents; provided, however that this provision does not apply to claims, loss, liability, damage or expense arising from (a) the sole negligence or willful misconduct of City of San Mateo or (b) the active negligence of City of San Mateo; further provided, that this provision shall not affect the validity of any insurance contract, workers compensation or agreement issued by an admitted insurer as defined by the Insurance Code. Contract will defend City of San Mateo, its elected and appointed officials, employees, and agents, against any such claims. SP -7-6.1 QUALIFICATIONS OF CONTRACTOR'S REPRESENTATIVE. Special Provision 7-6.1 is added to Section 7-6 of the Standard Specifications. The Contractor's representative(s)/superintendent(s) shall have been prequalified. In the event those prequalified representatives cannot perform this role for the Work, other representative(s) must be qualified by the City in writing. The City will use criteria identical to those listed in the prequalification package. This requirement also applies if, for any reason, a qualified Contractor representative is no longer employed on the Work and needs to be replaced. SP -7-7 COOPERATION AND COLLATERAL WORK. Special Provision 7-7.1 is added to Section 7-7 of the Standard Specifications. The City of San Mateo, its workers and contractors, and others, have the right to operate within or adjacent to the work site to perform work. The City of San Mateo, the Contractor, and each of such workers, contractors, and others, shall coordinate their operations and cooperate to minimize interference. SP -7-8.6 WATER POLLUTION CONTROL. Special Provision 7-8.6 replaces Section 7-8.6 of the Standard Specifications. In compliance with the "City of San Mateo Storm Water Management and Discharge Rules and Regulations" ("Discharge Rules") and the State Board Construction General Permit, the Contractor shall exercise every reasonable precaution to prevent the discharge of any material which is not solely storm water (i.e., rainfall generated runoff) to the storm drain system which includes, but is not limited to, catch basins, drainage channels, creeks, lagoons and San Francisco Bay. Non -allowable discharges include, but are not limited to, eroded soil from stockpiles or disturbed earth on -site, concrete and concrete washout water, slurries, grouts, fuel, oil, and other vehicle fluids, solid wastes, and construction chemicals. Storm water pollution control work is intended to provide prevention, control, and abatement of such storm water pollution, and shall consist of constructing those facilities which may be contained in the Contractor's storm water pollution control program, shown on the plans, specified herein, or directed by the Engineer. Q:ApwVPWENCr\ZannnitABayfron, Levee South ACONTRACT - FINAL AContract Book - Final ANotice and Front Fnd - Nayfront.doc A -3O 1 1 1 1 Effective storm water pollution control shall be provided for the duration of all work, continuously, and not limited to normal working hours. At the pre -construction conference the Contractor shall submit, for favorable review by the Engineer, a program to control storm water pollution effectively during construction of the project. This Storm Water Pollution Prevention Plan (SWPPP) shall be prepared at least 60 days prior to the commencement of any activity that generates storm water pollution, in conformance with the California State Water Resources Control Board's Construction General Permit requirements. The SWPPP shall show the schedule for erosion control work included in the contract, and for all storm water pollution control measures which the Contractor proposes to take in connection with construction of the project. The Contractor shall take the following minimum actions to prevent the unauthorized discharge of pollutants into San Francisco Bay and adjacent waters: 1. Control and prevent discharge of all potential construction -related pollutants. 2. Install and maintain soil erosion and sediment controls continuously throughout the course of construction. Remove controls only at the completion of site work. 3. Protect storm drain inlets. 4. Permanently stabilize all exposed soil and other fills, as well as any work below the high tide line at the earliest practicable date, in conformance with the contract documents. 5. Stabilize site access points to avoid tracking materials off -site. 6. Implement and maintain effective wind erosion controls. 7. Provide effective soil cover for inactive areas during the progress of work, as defined by the Construction General Permit. 8. Stabilize denuded areas. 9. Maintain denuded areas as necessary during construction. 10. Do not allow vehicles and equipment to enter environmentally sensitive areas as identified on the Plans. All vehicles and equipment shall remain within designated work areas. 11. Equipment shall not enter San Francisco Bay when the work area is flooded by tides. 12. Place heavy equipment working in wetland and tidal areas on mats, or take other appropriate measures to minimize soil disturbance. 13. Protect adjacent properties from degradation. 14. Leave existing vegetation undisturbed during construction activities to the maximum extent practicable. 15. Stabilize temporary conveyance channels and outlets. 16. Use sediment controls and filtration to remove sediment from water generated by dewatering. 17. Prohibit the use of pilings or other wood materials that have been pressure treated with creosote. 18. Prevent construction debris from entering the channels, wetlands, or environmentally sensitive areas in and adjacent to the project sites. 19. Use proper materials and waste storage, handling, and disposal practices. Remove all debris, concrete remains, and construction materials from the project site and legally dispose of them offsite. Contain food refuse in secure bins and remove food refuse daily. 20. All waste containers shall be covered at the end of each day and before rain events. 21. Prevent discharges from waste disposal containers to the storm water drainage system or receiving water. (14w111 NGA7_ammit\H Levee South ACONTRACT - FINAL VCot traet Book - Final\Notice and Front End - Bayfront.doc A-31 1 1 1 1 1 1 I 1 1 1 1 1 22. All chemicals shall be stored in watertight containers (with appropriate secondary containment to prevent any spillage or leakage) or in a storage shed. 23. Contractor shall prepare a hazardous spill prevention plan as part of the project's Storm Water Pollution and Prevention Plan. The plan will describe what actions will be taken in the event of a spill. The plan will also incorporate preventive measures to be implemented, such as the placement of refueling facilities, storage and handling of hazardous materials. 24. Vehicle staging, cleaning, maintenance, refueling, and fuel storage will be located 150 feet or more from any water body or wetland. If the Contractor cannot meet this 150 -foot requirement for particular actions, the Contractor shall describe additional BMPs in the hazardous spill prevention plan and implement those BMPS. 25. Contractor shall refuel equipment in the staging area only. Fuel absorbent mats shall be used when refueling equipment. 26. Contractor shall maintain machinery and implements used during the project in good repair, free of excessive leaks and steam cleaned off -site prior to entering the work area. Fluid leaks will either be repaired or contained within a suitable waste collection device (e.g., drip pads, drip pans). When changing hydraulic lines, care shall be taken to keep hydraulic fluid from entering a water body or soils. 27. Ensure the containment of concrete washout areas and other washout areas that may contain additional pollutants so there is no discharge into the underlying soil and onto the surrounding areas. 28. Ensure the containment of sanitation facilities (e.g., portable toilets) to prevent discharges of pollutants to the storm water drainage system or receiving water. 29. Prepare a contingency plan in the event of unexpected rain or a control measure failure. 30. Maintain a supply of emergency erosion control materials on hand at the project site. 31. Suspend all construction activity during periods of inclement weather (rain is imminent) or high tides, when such activity could lead to significant soil disturbance. 32. Stabilize all disturbed areas within 12 hours of any break in work unless construction will resume work within 7 days. 33. Cover and berm all stockpiled materials not actively being used. 34. Promptly off -haul spoils and other construction debris from work areas; and dispose or stockpile offsite using best management practices as outlined in the Storm Water Pollution Prevention Plan. 35. Upon project completion, restore and re -vegetate work areas in conformance with the contract documents and restore all disturbed soils adjacent to the project sites to their natural pre -construction condition. In addition, during saw cutting and slurry operations the Contractor shall cover or barricade catch basins using control measures such as filter fabric, straw bales, sand bags, or fine gravel dams to keep slurry out of the storm drain system and San Francisco Bay. When protecting an inlet, the Contractor shall ensure that the entire opening is covered. The Contractor shall shovel, absorb, and/or vacuum saw cut slurry and pick up all waste prior to moving to the next location or at the end of each working day, whichever is sooner. If -saw cut slurry enters a storm drain inlet, the Contractor shall remove the slurry immediately. The Contractor shall coordinate storm water pollution control work with all other work done on the contract. The Contractor shall not perform any clearing and grubbing or earthwork on the project, other than that specifically authorized in writing by the Engineer, until the required Q:Apwa'WENGyZammfiABayfont Levee SnmhACONTRACT- FINAL VContract Book - Fimil'Notice and Front End - Bay&ontdoc A-32 1 1 1 1 1 1 1 1 storm water pollution control program has been accepted. The Contractor shall train all employees and subcontractors on the approved storm water pollution control measures. The City will not be liable to the Contractor for failure to accept all or any portion of an originally submitted or revised storm water pollution control program, or for any delays to the work due to the Contractor's failure to submit an acceptable storm water pollution control program. During construction of the project, if the storm water pollution control measures being taken by the Contractor prove inadequate to control storm water pollution, the Engineer may direct the Contractor to revise his operations and/or his storm water pollution control program. If the Contractor fails to adequately revise his operations after such direction, the Engineer may cause the storm water pollution control measures to be performed by others, the costs to be deducted from any monies due or to become due the Contractor. The complete cleanup of all material, which 'is discharged from the project in violation of the Discharge Rules, shall be the responsibility of the Contractor. Should the Contractor fail to respond promptly and effectively to the Engineer's request for cleanup of such discharges, the Engineer may cause the cleanup to be performed by others, the costs to be deducted from any monies due or to become due the Contractor. Nothing in the terms of the contract nor in the provisions in this section shall relieve the Contractor of the responsibility for compliance with Sections 5650 and 12015 of the Fish and Game Code, or other applicable statutes relating to prevention or abatement of storm water pollution. Full compensation for creating and implementing an acceptable storm water pollution control program shall be included in those items of the bid schedule requiring erosion control and storm water pollution control, and no additional compensation shall be made. SP -7-8.8 HABITAT PROTECTION. Special Provision 7-8.8 is added to Section 7-8 of the Standard Specifications. Sensitive habitat areas are designated on the Drawings. The Contractor shall avoid temporary construction disturbance to wetlands, to the maximum extent feasible and as noted on the Drawings. lf, in the opinion of the Engineer, the Contractor has disturbed wetland habitat adjacent to the cut and fill limits shown on the drawings, the Contractor shall restore suitable conditions for wetland re-establishment. Such restoration will be directed by a qualified Biologist and may include contour grading to restore pre -disturbance topography, tilling or ripping to relieve compaction, track -walking (with low ground pressure equipment), and seeding with appropriate native species as indicated in these specifications. Habitat protection fencing shall be modified and installed as shown and detailed on the Drawings to indicate the limits of environmentally sensitive areas (ESA) within which construction activities are prohibited. On the project side of the ESA fence, an additional silt fence shall be installed as detailed on the Drawings with the intent of preventing the discharge of fill into bay and salt marsh habitats inside the ESA, and to minimize the potential for certain species such as California clapper rail to enter the project site during construction. Q:ApwWWENGAZanunitABayfront levee South VCONTRACT - FINALVContract Book -FinalA Notice and Front End - Bayfront.doc A-33 1 1 1 1 t 1 1 1 Contractor shall schedule and attend a pre -construction worker training session for California clapper rail avoidance to be given by the Biologist. Full compensation for protecting sensitive habitat areas and avoiding special status species shall be included in the various bid items and no additional compensation shall be made. Construction delays to accommodate special status species avoidance that could not have been reasonably anticipated are addressed in SP -6-6.5. SP -7-9 PROTECTION AND RESTORATION OF EXISTING IMPROVEMENTS. Special Provision 7-9 replaces the second and sixth paragraphs of Section 7-9 of the Standard Specifications. The Contractor shall repair or replace all existing improvements not designated for removal which are damaged or removed as a result of its operation. Improvements, such as but not limited to, curbs, gutters, sidewalks, driveways, fences, walls, signs, pavements, raised pavement markers, thermoplastic pavement markings, signs, sprinkler systems, or plantings, shall be repaired and replaced to a condition equal to or better than the original condition. All costs to the Contractor for protecting, removing, and restoring existing improvements shall be included in the various bid items and no additional compensation shall be made by the City. SP -7-10.1 TRAFFIC AND ACCESS. Special Provision 7-10.1 replaces Section 7-10.1 of the Standard Specifications. The Contractor shall be responsible, during all phases of the work, to provide for public safety and convenience by use of traffic cones, signs, lighted barricades, lights, and flagmen as described and specified in the State of California, Department of Transportation MANUAL OF TRAFFIC CONTROLS - For Construction and Maintenance Work Zones, latest edition. (Section 360, California Vehicle Code, defines highways to include streets.) The provisions of this manual will become a part of the requirements of the contract. Construction operations shall be conducted in such a manner as to cause as little inconvenience as possible to the abutting property owners, pedestrians, bicyclists and the motoring public. Convenient access to driveways, houses, and buildings along the line of work, including material delivery routes, shall be maintained unless otherwise approved by the City in advance. Contractor shall request and obtain approval from City before any lane closures are implemented. Open excavation and ditches across a roadway shall be covered and guarded in such a manner as to permit safe traffic flow during hours when no work is being performed. Open trenches in all public utility easements shall be covered and fenced off in such manner as no small children or any person or pets would accidentally fall in when no work is being performed. Payment for the bid item "Pedestrian and Traffic Control" shall include full compensation for preparation of the traffic plan and traffic control, no additional compensation will be paid. Contractor shall furnish the Engineer with a Traffic Control Plan before the commencement of work. No work will be allowed to be performed until a Traffic Control plan is approved by the Engineer. Q:ApwVPWNNGAGtmmitVBayfront Levee soutNACONTRACT- FINAI.\Contract Book - FinalANotice and Front End- Bayfront.doc A-34 1 1 1 1 1 1 SP -7-10.2.1 STORAGE OF MATERIAL NEAR BAY MUD. Special Provision 7-10.2 is added to Section 7-10.2 of the Standard Specifications. The Contractor's attention is directed to Appendix Il regarding prohibitions against stockpiling material near work areas underlain by Bay Mud. The Contractor's attention is directed to Sections 02300-3.03 and 3.04 for limitations on material stockpiling and equipment weight. SP -7-10.5 NOTIFICATIONS. Special Provision 7-10.5 is added to Section 7-10 of the Standard Specifications. Contractor shall provide a minimum of one week's written notice to all affected residents and/or property owners prior to starting work. Contractor shall provide a minimum of 72 hours written notice to residents/owners of private property prior to accessing manholes in public utility easements. Contractor shall provide a minimum of 72 hours written notice to all affected residents/owners prior to any night work. Contractor shall submit for approval at the pre - construction meeting a copy of the notification letter to be used. A summary of notices with • examples is provided in Appendix III. SP -8-2.2 FIELD OFFICE. Special Provision 8-2.2 replaces Section 8-2.2 and deletes Section 8- 2.1 and 8-2.3 of the Standard Specifications. The Contractor may furnish a suitable field office with sanitary facilities on City -provided space located adjacent to J. Hart Clinton Drive within the parking lot opposite Anchor Road, or at a location approved in advance by the Engineer. The Engineer shall approve the field office prior to its placement on site. The Contractor is responsible for providing any desired utility hookups. The Contractor is not required to furnish field office space for City personnel. SP -9-3 PAYMENT SP -9-3.1.1 GENERAL. Special Provision 9-3:1.1 is added to Section 9-3.1 of the Standard Specifications. Except as directed otherwise in these specifications, full compensation for completing all of the work indicated on the plans and directed herein is considered to be included in the contract unit prices paid for the various items of work and no separate payment will be made therefor. SP -9-3.1.2 TEN PERCENT (10%) RETENTION: Special Provision 9-3.1.2 is added to Section 9-3.1 of the Standard Specifications. To ensure performance, City is entitled to retain ten percent (10%) of the contract price for 35 days after it records the Notice of Completion. However, pursuant to the Public Contracts Code Section- 22300, the Contractor may substitute securities for said ten percent (10%) retention or request that the City make payments of retentions earned directly to an escrow agent at the Contractor's expense. The provisions of the Public Contracts Code Section 22300 are hereby expressly made a part of the contract. SP -9-3.2.1 PARTIAL AND FINAL PAYMENTS. Special Provision 9-3.2.1 is added to Section 9-3.2 of the Standard Specifications. Q?pwWWENGAZammitABayfront Levee SouthVCONTRACT - FINAL AContract Book - FinalANoticc and Front End - Bayfrontdoc A-35 1 I 1 I 1 1 1 1 Contractor shall submit each month a "Monthly Progress Payment Request" in accordance with the schedule established at the preconstruction conference. Contractor shall use City's standard form for such requests and submit one original plus three copies of each request. The "Monthly Progress Payment Request" will not be reviewed until each Contractor and Subcontractor and any lower -tier Subcontractor have submitted Certified Payroll records for each work week for the time period listed on the pay request. If he/she performs no work on the project during a given work week, he/she may either submit a weekly payroll form with the notation, "No work performed during this work week," or submit a letter to that effect. SP -9-3.4 MOBILIZATION. Special Provision 9-3.4 replaces Section 9-3.4 of the Standard Specifications. Payment for mobilization shall be as follows: A. When the monthly partial payment estimate of the amount earned, not including the amount earned for mobilization, is five percent (5%) or more of the original contract amount, fifty percent (50%) of the contract item price for mobilization or five percent (5%) of the original contract amount, whichever is the lesser, will be included in said estimate for payment. B. When the monthly partial payment estimate of the amount earned, not including the amount earned for mobilization, is ten percent (10%) or more of the original contract amount, the total amount earned for mobilization shall be seventy-five (75%) of the contract item price for mobilization or 7.5 percent of the original contract amount, whichever is the lesser, and said amount will be included in said estimate for payment. C. When the monthly partial payment estimate of the amount earned, not including the amount earned for mobilization is twenty percent (20%) or more of the original contract amount, the total amount earned for mobilization shall be ninety-five percent (95%) of the contract item price for mobilization or 9.5 percent of the original contract amount, whichever is the lesser, and said amount will be included in said estimate for payment. D. When the monthly partial payment estimate of the amount earned, not including the amount earned for mobilization, is fifty percent (50%) or more of the original contract amount, the total amount earned for mobilization shall be one hundred percent (100%) of the contract item price for mobilization or ten percent (10%) of the original contract amount, whichever is the lesser, and said amount will be included in said estimate for payment. Any remainder will be paid Contractor at close of the job. The contract priced paid for mobilization shall include full compensation for furnishing all labor, materials, tools, and equipment necessary for mobilization as specified herein. The maximum allowable price bid for mobilization shall be ten percent of the remaining total bid. Q:vpwPWENGAZammitABayfront Levee SouthVCONTRACT- FINAL.Conlemt Book-FinalANotice and Front End - Bayfront.doc A-36 I 1 1 1 1 1 1 1 1 1 1 1 CITY OF SAN MATEO SAN MATEO COUNTY, CALIFORNIA TECHNICAL PROVISIONS FOR THE CONSTRUCTION OF CITY OF SAN MATEO BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT PROJECT NO. 468301-46000-0553 November 11, 2010 1 11 1 1 1 1 1 1 SECTION 00005 CERTIFICATION THESE TECHNICAL PROVISIONS WERE PREPARED UNDER THE SUPERVISION OF: Charles D. Anderson, P.E. California Registered Civil Engineer No. C43776 Schaaf & Wheeler Consulting Civil Engineers 100 N. Winchester Boulevard, Suite 200 Santa Clara, California 95050 (408) 246-4848 END OF SECTION TABLE OF CONTENTS SECTION 00010 DIVISION 1 — GENERAL REQUIREMENTS 1 1 1 1 1 1 1 1 1 1 SECTION NO. TITLE 01010 SUMMARY OF WORK 01020 WORK CONSTRAINTS 01025 MEASUREMENT AND PAYMENT 01047 UTILITY COORDINATION 01120 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES 01500 CONSTRUCTION FACILITIES 01600 ENVIRONMENTAL PROTECTION SECTION NO. DIVISION 2 - SITE CONSTRUCTION TITLE 02200 SITE PREPARATION 02260 EXCAVATION SUPPORT AND PROTECTION 02279 CONCRETE BLOCK REVETMENT 02300 EARTHWORK 02318 TRENCHING 02325 SOIL-BENTONITE SLURRY CUTOFF WALLS 02330 SHEET PILE CUTOFF WALLS 02622 FILTER FABRIC AND GEOTEXTILES 02700 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS 02722 AGGREGATE BASE COURSE 02725 DECOMPOSED GRANITE 02742 ASPHALTIC CONCRETE PAVING 02750 ELASTOMERIC CHECK VALVES 02772 CONCRETE CURBS, GUTTERS, AND SIDEWALKS 02830 CHAIN LINK FENCING 02925 TOPSOIL PREPARATION 02955 SEEDING 02990 PAVEMENT RESTORATION AND REHABILITATION CITY OF SAN MATEO Bayfront Levee Improvements Section 00010 Page 1 1 1 1 1 1 I 1 1 1 1 TABLE OF CONTENTS SECTION 00010 DIVISION 3 - CONCRETE SECTION NO. TITLE 03071 EPDXIES 03072 EPDXY RESIN/PORTLAND CEMENT BONDING AGENT 03102 CONCRETE FORMWORK 03150 CONCRETE ACCESSORIES 03200 CONCRETE REINFORCEMENT 03300 CAST -IN -PLACE CONCRETE 03400 PRECAST CONCRETE 03600 GROUTS SECTION NO. DIVISION 5 - METALS TITLE 05500 METAL FABRICATIONS DIVISION 9 - FINISHES SECTION NO. TITLE 09960 COATINGS END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 00010 Page 2 1 1 1 1 1 1 1 1 1 1 SECTION 01010 SUMMARY OF WORK PART 1 GENERAL 1.01 WORK COVERED BY CONTRACT DOCUMENTS A. The project consists of the completion of a series of flood protection improvements at four locations identified as the San Mateo Creek Mouth site, the Detroit Drive site, the Seal Slough site and the East End Levee site. Work will take place within environmentally sensitive Bay and wetland environments subject to tidal flooding and regulatory permit requirements. B. The work includes per plan: 1. Selective demolition of existing reinforced concrete structures and steel railings. 2. Clearing and grubbing of existing earthen levee features, per specification, including removal of asphalt concrete path and fill material only as necessary for construction of new levee sections per plans and specifications. 3. Protection of existing high voltage underground electric utility throughout demolition and construction activities; and working in the vicinity of overhead high voltage electric transmission lines. 4. Dewatering and the construction of all temporary shoring systems required to complete the work. 5. The provision of temporary flood protection measures as directed. 6. Storm water pollution prevention and site protection measures shown on the plans, specified herein, and/or required by regulatory agencies. 7. Foundation preparation and compacted engineered fill as shown on the Plans and specified herein. 8. Soil-bentonite slurry and vinyl sheetpile cutoff walls. 9. Reinforced concrete structures and appurtenances, complete and in place, as described by the plans and specifications. 10. Paved pathways, signage, and other civil improvements. 11. Soil preparation and/or amendment and/or importation, and seeding as required for site revegetation as shown on the Plans and specified herein. 12. Traffic and pedestrian control throughout construction in conformance with the plans and as directed by the Engineer. 13. Replacement or repair of landscaped areas disturbed during contstruction including turf, plants and irrigation systems. 14. Other miscellaneous and incidental improvements for complete facilities. CITY OF SAN MATEO Bayfront Levee Improvements Section 01010 Page 1 1 1 1 1 1 t 1 1 1 1 1 1 1 SUMMARY OF WORK SECTION 01010 1.02 WORK PLAN A. Contractor shall submit a Work Plan for review and approval by the City, fully describing the proposed procedures to conform to the Contract Documents. B. The Work Plan shall fully describe the planned sequence of operations at all of the project sites, list major milestones of completion, include a milestone schedule, and include a contingency plan for potential weather delays. 1.03 OCCUPANCY REQUIREMENTS A. None 1.04 CITY FURNISHED MATERIALS A. None 1.05 WORK UNDER OTHER CONTRACTS A. PG&E has easements to maintain their overhead and underground utilities within the project site. Should PG&E perform such maintenance of other work concurrently with the Contractor's work under this Contract, Contractor shall make reasonable efforts to accommodate access for this work, including meetings to coordinate with PG&E. B. Associated wetland mitigation. within Foster City near the East End levee for the City may take place during this work. The Contractor shall meet with the City to coordinate project access and concurrent construction as necessary. 1.06 REFERENCE DOCUMENTS A. The City has prepared a number of project documents that are available for inspection by the Contractor for his reference and information. 1. Lowney Associates, "Geotechnical Study: San Mateo Outboard Levees, Removal of 100 -year Tidal Flood Plain," August 2003. 2. ENGEO, Inc, "Supplemental Geotechnical Exploration, City of San Mateo Bayfront Levee Emprovements, Seal Slough Site and East End Levee Site," September 2009. 3. H.T. Harvey and Associates, "City of San Mateo Bayfront Levee Improvements Projects, Wetland Mitigation and Monitoring Plan," 4. David J. Powers and Associates, "Mitigated Negative Declaration and Initial Study: Outboard Bayfront Levee Project (San Mateo Creek to Foster City Limit)," B. The referenced reports are not part of the Contract Documents and are for information only. Reports are available from the City by contacting Cathi Zammit at (650) 522-7306. CITY OF SAN MATEO Bayfront Levee Improvements Section 01010 Page 2 SUMMARY OF WORK SECTION 01010 1 1 1 1 1 1 1 1 1 1 1 1 PART 2 PRODUCTS Not Used. PART 3 EXECUTION Not Used. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 01010 Page 3 I I I I I I I I I I I I I I I I I SUMMARY OF WORK SECTION 01010 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 01010 Page 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SECTION 01020 WORK CONSTRAINTS PART 1 GENERAL 1.01 SITE USE AND CONSTRUCTION RESTRICTIONS A. The project sites and adjacent areas provide pedestrian and bicycle access for the public and vehicular access for the City. Contractor shall coordinate with the City and with officials of adjacent Foster City to provide reasonable access during construction in conformance with the traffic control schematics shown on the Plans. B. Bay trail closures shall be minimized in conformance with the traffic control schematics shown on the Plans. The affect of this constraint on the prosecution of work shall be addressed in the work plan described by Section 01010-1.02. C. To minimize disruption to the property owner adjacent to the Seal Slough work site, site paving and fencing shall be restored or improved as shown on the Plans and specified herein, within 15 days of the completion of improvements at Seal Slough. D. Allowable areas for construction staging and material stockpiling are shown in Appendix I I. Written permission from the Engineer must be obtained before storing any materials outside of these pre -approved areas. E. Construction impacts due to identified or observable site access constraints shall be considered by the Contractor when making his bid, and the costs associated with such constraints shall not be compensated for beyond the provisions contained herein. 1.02 UNDERGROUND FACILITIES A. The Contractor is responsible for coordinating all project documentation, including but not necessarily limited to, the Contract Documents and existing record drawings for the determination of the location of all underground facilities. Contractor shall have utilities marked in the field by Underground Services Alert a minimum of 48 hours prior to the start of construction. B. The Contractor shall exercise care in all excavations to avoid damage to existing underground facilities. This shall include potholing or hand digging in those areas where underground facilities are known to exist until they have been sufficiently located to avoid damage to the facilities. C. Particular attention shall be given to Paragraph 1.03 of this section. No additional compensation shall be provided the Contractor for compliance with the provisions of this section or for the damage and repair of facilities due to the lack of such care. CITY OF SAN MATEO Bayfront Levee Improvements Section 01020 Page 1 1 1 1 1 1 1 1 I 1 1 1 1 1 WORK CONSTRAINTS SECTION 01020 1.03 SEASONAL RESTRICTIONS A. Contractor shall in the Work Plan prepared under Section 01010, address construction during the winter seasonal period defined as October 15 through April 15 of the subsequent calendar year. The City retains the right to accept or reject any such plan, in whole or in part. Acceptance by City shall not constitute a guarantee or endorsement of any kind that such work will be feasible, economical, or not subject to cost increase and/or delay caused by weather or other factors. B. Seasonal construction impacts shall be considered by the Contractor when making his bid, and winter delays shall not be compensated for beyond the provisions contained herein. C. Contractor is hereby notified that to meet the Contract Schedule, work will be required during the winter seasonal period as defined herein, subject to the special environmental restrictions defined in Section 01600. 1.04 WORK SITES SUBJECT TO DAILY TIDES A. Contractor is advised that portions of the work are subject to inundation from daily tides. B. Construction impacts from daily tides shall be considered by the Contractor when making his bid, and delays due to tidal action that could have been reasonably predicted in advance shall not be compensated for beyond the provisions contained herein. C. It is the Contractor's sole responsibility to monitor predicted tides in advance of his work and to incorporate those predictions into his Work Plan. Contractor shall be responsible for converting predicted tide elevations from their source datum to the Project Datum. Contractor is advised that during unsettled periods of stormy weather, storm surges can increase tidal elevations relative to predicted elevations. D. Work shall not occur during periods of high tide within any project site if such work would be jeopardized by those tides. E. No work shall take place at the East End Levee within two (2) hours before or after extreme high tides, measured as tides greater than 102.3 feet Project Datum, or 8.3 feet MLLW Datum at the NOAA tide gage located on the west end of the San Mateo Bridge. 1.05 WORK SEQUENCE A. The overall sequence of the Work shall comply with all restriction requirements and constraints in the Contract Documents. Work sequence shall be addressed on location -specific Work Plans. CITY OF SAN MATEO Bayfront Levee Improvements Section 01020 Page 2 WORK CONSTRAINTS SECTION 01020 1 1 1 1 1 1 1 1 1 1 B. Multiple crews may be necessary to complete the Work within the contractually allotted time frame given the constraints described herein and conditions met in the field. The use of multiple crews is at the sole discretion of the Contractor. C. Construction of Structural Floodwall Nos. 3, 4 and 5 shall be completed before beginning work on Structural Floodwall Nos. 1 and 2. 1.06 EQUIPMENT RESTRICTIONS A. Only lightweight construction equipment appropriate for the field conditions shall be used. B. It is the Contractor's responsibility to provide working equipment that will not cause soil instability or excessive settlement. C. Vibratory compaction shall not be used. PART 2 PRODUCTS Not Used. PART 3 EXECUTION Not Used. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 01020 Page 3 I I I I I I I I I I I I I I I WORK CONSTRAINTS SECTION 01020 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 01020 Page 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SECTION 01025 MEASUREMENT AND PAYMENT PART 1 GENERAL 1.01 MEASUREMENT OF QUANTITIES A. Measurements of the completed work shall be in accordance with, and by instruments and devices calibrated to United States Standard Measures and the units of measurement for payment, and the limits thereof, shall be made as shown on the Plans, Specifications, General Requirements, and Supplementary Conditions. B. Payment for the various items of the Bid Schedule, as further described herein, shall include all compensation to be received by the Contractor for furnishing all tools, equipment, supplies and manufactured items and for all operations, and incidental appurtenances to the items of work being described, as necessary to complete the various items of work all in accordance with the requirements of the Contract Documents. Payment for the various items of the Bid Schedule shall include all costs of permits, business licenses, and the cost of compliance with the regulations of public agencies having jurisdiction, including the Department of Public Health, Safety and Health Requirements of the California Division of Industrial Safety and the Occupational Safety and Health Administration of the U.S. Department of Labor (OSHA). No separate payment will be made for any item that is not specifically set forth in the Bid Schedule, and all costs therefore shall be included in the prices named in the Bid Schedule for various appurtenant items of work. 1.02 UNITS OF MEASUREMENT A. Measurements shall be in accordance with U.S. Standard Measures. A pound is an avoirdupois pound. A ton is 2,000 pounds avoirdupois. The unit of liquid measure is the U.S. gallon. B. When payment is to be made on the basis of weight, the weighing shall be done on certified platform scales, or when approved by the City's Representative, on a completely automated weighing and recording system. The Contractor shall furnish the City's Representative with duplicate licensed weighmaster's certificates showing the actual net weights. The City will accept the certificates as evidence of the weights delivered. 1.03 METHODS OF MEASUREMENT A. Materials and items of work, which are to be paid for on the basis of measurement, shall be measured in accordance with the method stipulated in the particular sections involved. In determining quantities, all measurements shall be made in a horizontal plane unless otherwise specified. CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 1 1 1 1 1 1 1 1 1 MEASUREMENT AND PAYMENT SECTION 01025 B. Material not used in the work and remaining on a transporting vehicle shall be determined by the City's Representative and deducted from the certified tag. C. When material is to be measured and paid for on a volume basis and it would be impractical to determine the volume, or when requested by the Contractor in writing and approved by the City in writing, the material will be weighed and converted to volume measurement for payment purposes. Factors for conversion from weight measurement to volume measurement will be determined by the City and shall be agreed to by the Contractor before such method of measurement of pay quantities will be adopted. D. Full compensation for all expense involved in conforming to the above requirements for measuring and weighing materials shall be considered as included in the unit prices paid for the materials being measured or weighed and no additional allowances will be made therefore. E. Quantities of material wasted or disposed of in a manner not called for under the Contract; or rejected loads of material, including material rejected after it has been placed by reason of failure of the Contractor to conform to the provisions of the Contract; or material not unloaded from the transporting vehicle; or material placed outside the lines indicated on the plans or given by the City's Representative; or material remaining on hand after completion of the Contract, will not be paid for and such quantities will be deducted from the final total quantities. No compensation will be allowed for hauling rejected material. 1.04 DESCRIPTION OF BID ITEMS A. The bid items are presented to indicate major categories of the work for purposes of comparative bid analyses, and a preliminary breakdown for monthly progress payments. Bid items are not intended to be exclusive descriptions of work categories and the Contractor shall determine and include in its pricing all materials, labor, and equipment necessary to complete each Bid Item as shown and specified. B. Contractor shall perform all work depicted in the Contract Documents whether it is specifically mentioned in the Bid Schedule and bid item descriptions or not. The Bid Schedule and the Bid Item Descriptions below are intended to cover any and all Work depicted in the Contract Documents. Not all elements of every part of the Work are explicitly listed. It is the intention of City and a provision of this Contract, that any and all of the Work depicted shall be included in Contractor's bid and installed complete at a price included in a Bid Item submitted with Contractor's bid. No adjustments will be made to unit, extended, or total prices for an item that is depicted in the contract documents but is not specifically described or itemized. Such items may be included for payment in a bid item of the Contractors' choice, as long as the chosen bid item is closely related. CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 2 1 1 1 1 1 1 1 1 1 1 1 1 MEASURMENT AND PAYMENT SECTION 01025 C. Bid Item Descriptions 1. Mobilization and Demobilization The lump sum bid price for this item shall constitute full compensation for preparatory work and operations, including but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project sites; for the establishment of all field offices, storage areas and fencing, and all other temporary facilities necessary for work on the Project; and for the removal of all such items and facilities at the completion of construction. Ten percent of this bid item will be reserved and paid at the job close when the Contractor has completed all operations and removed all temporary facilities from the work sites. This bid item will be paid in accordance with Paragraph SP -9-3.4 of these Special Provisions. 2. Bonds and Insurance This bid item includes all costs for the performance bond, payment bond, and required insurance. It will be paid as a lump sum after the City receives satisfactory bond and insurance forms. 3. Pedestrian and Traffic Control This bid item includes all work necessary to prepare, implement, and maintain a pedestrian and traffic control plan. It will be paid on a monthly prorated basis beginning in the month when the first traffic control measures are installed. Ten percent of this bid item will be reserved and paid at the job close when the Contractor has completed all work requiring pedestrian and traffic control and removed all control devices from the work sites. 4. Work Planning and Submittals This bid item includes all work to prepare various work plans and submittals required by the Contract Documents prior to beginning physical work on site, including but not limited to construction schedules, Storm Water Pollution Prevention Plan (SWPPP), site specific work plans, utility protection plan, environmental protection submittals, shoring plan, stockpile management and dewatering plans, temporary flood protection plan, contaminated material handling plan, erosion control plans and any other special plans in conformance with the applicable permits; and any other plans or submittals not covered in other bid items. Up to 90 percent of this bid item will be paid to the Contractor upon acceptance of all required pre -construction plans and submittals; the remaining cost of this bid item will be paid to the Contractor at the close of construction. 5. San Mateo Creek Site Work (North) The lump sum price bid for this item shall constitute full compensation for all labor, materials, equipment, services, and incidentals required to complete the work on the north side of the San Mateo Creek site, including the bridge crossing, as specified in the Contract Documents except as specifically included in other separate bid items. CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MEASUREMENT AND PAYMENT SECTION 01025 This bid item includes, but is not limited to, construction of temporary facilities and preparation of the north San Mateo Creek site for all indicated work at the site; all demolition, site clearing, and removal; all work required to implement plans and submittals prepared under Bid Item No. 4 for this site; all work and protective measures required to comply with permit requirements; all handling and disposal of materials; all non-structural excavation and backfill; removal of all temporary facilities and protective measures; replacement or repair of existing improvements and facilities removed or damaged during construction; the restoration of existing landscaping disturbed, damaged or removed during construction; capping, relocating, reconstructing and otherwise making functional as in the pre - project condition, any existing irrigation system disturbed by project construction; and site cleanup. Bid Item No. 5 is a deductive alternate. The City reserves the right to determine, after bids are opened, whether sufficient funds are available to award this bid item. San Mateo Creek Site Work (South) The lump sum price bid for this item shall constitute full compensation for all labor, materials, equipment, services, and incidentals required to complete the work on the south side of the San Mateo Creek site as specified in the Contract Documents except as specifically included in other separate bid items. This bid item includes, but is not limited to, construction of temporary facilities and preparation of the south San Mateo Creek site for all indicated work at the site; all demolition, site clearing, and removal; all work required to implement plans and submittals prepared under Bid Item No. 4 for this site; all work and protective measures required to comply with permit requirements; all handling and disposal of materials; all non-structural excavation and backfill; removal of all temporary facilities and protective measures; replacement or repair of existing improvements and facilities removed or damaged during construction; and site cleanup. 7. Detroit Drive Site Work The lump sum price bid for this item shall constitute full compensation for all labor, materials, equipment, services, and incidentals required to complete the work at the Detroit Drive site as specified in the Contract Documents except as specifically included in other separate bid items. This bid item includes, but is not limited to, construction of temporary facilities and preparation of the Detroit Drive site for all indicated work at the site; all demolition, site clearing, and removal as shown on Plans; all work required to implement plans and submittals prepared under Bid Item No. 4 for this site; all work and protective measures required to comply with permit requirements; all handling and disposal of materials; all non-structural excavation and backfill, and fill construction; removal of all temporary facilities and protective measures; replacement or repair of existing improvements and facilities removed or damaged during construction; and site cleanup. Figure 1 illustrates the breakdown of bid items for the Detroit Drive site. CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 4 1 1 1 1 1 1 1 1 1 1 MEASURMENT AND PAYMENT SECTION 01025 8. Replacement of Foundation Soil at Floodwalls The unit price bid per cubic yard constitutes full compensation for all materials, labor, tools, equipment, transportation, and services needed to shore, excavate, remove and dispose of unsuitable foundation material and backfill with on -site and/or off -site soil meeting the specifications for engineered fill to the dimensions shown on the Plans, as directed by the Engineer. This bid item does not include the structural excavation and backfill, which is included in Bid Item Nos. 16 through 24. Figure 1 illustrates the breakdown of bid items for the Detroit Drive site. 9. Seal Slough Levee Site Work The lump sum price bid for this item shall constitute full compensation for all labor, materials, equipment, services, and incidentals required to complete the work at the Seal Slough Levee site as specified in the Contract Documents except as specifically included in other separate bid items. This bid item includes, but is not limited to, construction of temporary facilities and preparation of the Seal Slough site for all indicated work at the site; all demolition, site clearing, excavation, and removal as shown on Plans; all work required to implement plans and submittals prepared under Bid Item No. 4 for this site; all work and protective measures required to comply with permit requirements; all handling and disposal of materials; all embankment and fill construction; the termination of an existing effluent outfall pipe at a concrete manhole structure as shown on the Plans; the relocation and extension of an existing storm drain outfall as shown on the Plans; removal of all temporary facilities and protective measures; replacement or repair of existing improvements and facilities removed or damaged during construction; and site cleanup. 10. Removal of Rubble from Seal Slough Site The unit price bid per cubic yard for this item shall constitute full compensation to remove and dispose of concrete rubble and other unsuitable material that prevents the installation of the seepage cutoff wall, as directed by the Engineer. 11. Construction of Cutoff Wall at Seal Slough Site The unit price bid per square foot for this item shall constitute full compensation for all materials, equipment and services needed to complete the installation of a soil-bentonite slurry cutoff wall, including the engineered levee fill slurry wall cap; at the Seal Slough site as shown on the Plans and specified herein. 12. East End Levee Site Work The lump sum price bid for this item shall constitute full compensation for all labor, materials, equipment, services, and incidentals required to complete the work at the East End Levee site as specified in the Contract Documents except as specifically included in other separate bid items. This bid item includes, but is not limited to, construction of temporary facilities and preparation of the East End Levee site for all indicated work at the site; all demolition, site clearing, and removal; all work required to implement CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 5 1 1 1 1 P 1 t 1 1 MEASUREMENT AND PAYMENT SECTION 01025 plans and submittals prepared under Bid Item No. 4 for this site; all work and protective measures required to comply with permit requirements; all excavation to subgrade elevation 107.5 feet (Project Datum); all handling and disposal of materials; all embankment, aggregate base and fill construction above subgrade elevation 107.5 feet; removal of all temporary facilities and protective measures; replacement or repair of existing improvements and facilities removed or damaged during construction; and site cleanup. Figure 2 illustrates the breakdown of bid items for the East End Levee. 13. Removal of Rubble from East End Levee The unit price bid per cubic yard for this item shall constitute full compensation to excavate below subgrade elevation 107.5 feet, remove and dispose of concrete rubble and other unsuitable material that prevents the installation of the seepage cutoff wall, as directed by the Engineer. This bid item includes any shoring required for this excavation work. Figure 2 illustrates the breakdown of bid items for the East End Levee. 14. Reconstruction of East End Levee Fill The unit price bid per cubic yard for this item shall constitute full compensation for labor, materials, and equipment to reconstruct levee fill below subgrade elevation 107.5 feet as directed by the Engineer to replace rubble and unsuitable material excavated under Bid Item No. 13. 15. Construction of Cutoff Wall at East End Levee The unit price bid per square foot for this item shall constitute full compensation for all materials, equipment and services needed to complete the installation of a soil-bentonite slurry or sheet pile cutoff wall at the East End Levee as shown on the plans and specified herein. Figure 2 illustrates the breakdown of bid items for the East End Levee. 16-24. Structural Floodwalls The lump sum bid prices for these items shall constitute full compensation for providing all materials, labor, tools, equipment, transportation, services and incidentals required to construct the nine concrete floodwalls as shown on the Plans and specified herein. These bid items include any necessary selective demolition, structural excavation and backfill; concrete formwork, reinforcement, placement and finishing; architectural railing, fencing, and other related appurtenances. Bid Item Nos. 16, 17, and 18 (Structural Floodwall Nos. 1, 2, and 3 respectively) are deductive alternates. The City reserves the right to determine, after bids are opened, whether sufficient funds are available to award these bid items. CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 6 1 1 1 1 t 1 1 1 1 1 1 MEASURMENT AND PAYMENT SECTION 01025 25. Asphalt Concrete Surfacing The lump sum bid price for this item constitutes full payment for all materials, equipment, labor, and incidentals necessary to replace existing asphalt concrete surfacing disturbed, damaged or removed during construction; and to install new asphalt concrete surfacing as shown on the Plans; including striping. 26. Revegetation The lump sum bid price for this item constitutes full payment for all materials, equipment, labor, service and incidentals necessaryto complete all permanent revegetation work as shown on the Plans and specified herein, including all soil preparation, seeding, and erosion control fabric. This item does not include temporary erosion control or other protective measures required during construction. 1.05 CONTRACTOR'S COST BREAKDOWN A. The Contractor shall submit a Schedule of Values to the City's Representative at the preconstruction conference. The price breakdown, as agreed upon by the Contractor and the City's Representative, shall be used for preparing future estimates for partial payments of lump sum items to the Contractor. B. The Schedule of Values shall be solely used to determine progress payments. The Schedule of Values shall not be considered in determining payment or credit for additional or deleted work. PART 2 PRODUCTS Not Used. PART 3 EXECUTION Not Used. CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 7 MEASUREMENT AND PAYMENT SECTION 01025 1 1 1 1 1 1 1 1 FU»3*W.1 IYJUEK ,:•,• °Iri4iCR18+1 Eira117a in0 vont / br II1N Na.. 41 s , SIfiVEF �PAX CF ER IIEY RP. F AL" RNaIB1T ff +BBB IRYI 'J trE LUIDEINT LW'IIFE [C ALL MI Cr BU RCI+ !CL .1tA.LFILMWE 1flIS YIflIGtl Gti'rsellW Auc Ant If 1 GlTM tt Paiaas1V:tr. AIL ter -11E 51. 4E WC rfgrAt i F4 mimic MEE FLL WI BEk Y. 8 Figure 1. Illustration of Bid Items for Detroit Drive Site REMOVE +,R1 Ac . SID ITEM NO. 12 EXCAVATE TO SUEGRADE BID ITEM ND. 12 SLURRY OR SHEET PILE CUTOFF- WALL MID ITEM NO, 15 AC PAL I„ a� BID I1EM NO. 25 Figure 2. Illustration of Bid Items for East End Levee END OF SECTION ER FLAN PLACE FILL AND AS .— TO TOPIEVEE EL.. DIL= ITEM NC. 12 REPLACE'i.EVEE FILL TO^.'SUEGRA'DE BID ITEM NO. 14 EXCAVATE A Fl LOLL MD REMAOY'E INT EER INC ,RU BE LE RIO ITEM NO. 13 CITY OF SAN MATEO Bayfront Levee Improvements Section 01025 Page 8 SECTION 01047 UTILITY COORDINATION 1 1 I 1 1 1 1 1 1 1 PART 1 GENERAL 1.01 DESCRIPTION A. This Section includes requirements for coordination with and protection of existing utilities. B. Locate and protect from damage existing utilities and other facilities that are to remain in place and existing utilities and other facilities that are to be relocated by others. C. Protect from damage new utilities and other facilities installed within the area of the Work during or prior to the Contract. 1.02 SUBMITTALS A. Contractor shall submit a Utility Protection Plan within 20 working days from the issuance of a Notice to Proceed. B. Utility Protection Plan shall at a minimum: 1. Describe locations of known utilities and how they are anticipated to affect the Work. 2. List confirmed utility contacts. 3. Identify how each utility will be protected in place during construction. 4. Describe in detail planned potholing as shown on the Plans and other potholing necessary to further identify underground utilities. 5. Describe in detail precautions that will be taken to protect the health, safety and welfare of workers and of the public, particularly for Work in and around high risk facilities. 6. Describe all emergency procedures that will be activated in the event of unanticipated contact with live overhead or underground utilities. 1.03 LOCATION AND PROTECTION OF EXISTING UTILITIES A. Known utilities are indicated on the Contract Drawings. B. Locate and identify all underground structures, facilities, and piping prior to commencing any Work which may compromise said utilities. C. Maintain existing utilities and protect from damage as necessary to satisfy the requirements of jurisdictional utility companies and related codes and regulations. Refer to potholing specified elsewhere in this section for additional requirements in regard to locating utilities. CITY OF SAN MATEO Bayfront Levee Improvements Section 01047 Page 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 UTILITY COORDINATION SECTION 01047 1. Refer to the General Provisions "NON -OWNER OWNED FACILITIES" for requirements for locating facilities not shown or facilities in a different location from that indicated. D. Do not disconnect or shut down any part of the existing utilities and services, except by permission of authorities having jurisdiction. 1. Submit schedule of estimated shut -down time in order to obtain such permission, and notify all interested parties, neighbors, utilities, and municipal and county authorities, as required. 2. Utilities to be removed shall not be removed until shut -down time and service impact can be kept to a minimum. Do not remove an existing utility line or service until the replacement line, crossover, or capping is ready to be performed. E. Provide shoring, underpinning, and structural support for existing utility lines and structures which become suspended or otherwise unsupported because of adjacent excavation operations. F. Protect against utility damage from settlement due to construction activities. G. Excavate, including potholing, in proximity of existing underground facilities using methods as required by the utility companies and as specified, whichever is more protective of underground facility. H. Protect active underground utilities from damage. If underground utilities are damaged in any way, notify the Engineer and affected utilities immediately for corrective action. In case of emergency involving utilities which participate in the Underground Service Alert (USA), call USA at 1 800 227 2660 and notify the Engineer of the assigned ID number or emergency issue. Comply with instructions of affected utility company and pay all expenses of repair made in connection with such damages. 1.04 NOTIFICATIONS AND POTHOLING FOR EXISTING UTILITIES A. Notify, prior to performing any excavation or other work close to any underground pipeline, conduit, duct, wire or other structure, the Engineer, the Underground Service Alert -Northern California (USA) at 1-800-227-2600, and utility companies that do not participate in USA which have underground facilities within the limits of the work. Notify USA at least 2 working days, but not more than 14 days prior to performing excavation or other work close to underground facility. Notify other utility companies in accordance with each utility's notification requirements. Have USA and other utility companies locate and mark their facilities within the area of excavation or other work. Maintain such markings in accordance with utility requirements, i.e. have markings renewed, as applicable. B. Potholing for Utilities and Other Facilities: Prior to any excavation or other subsurface work, excavate, expose, and verify the location of existing utility mains and laterals and other existing underground facilities which may be affected by the Work. CITY OF SAN MATEO Bayfront Levee Improvements Section 01047 Page 2 UTILITY COORDINATION SECTION 01047 1 1 1 1 1 1 1 1 1 1 1. At a minimum, pothole and accurately locate all marked or inferred facilities located with less than five (5) feet of clearance to the nearest point of proposed trenching, excavation, shoring, pile or other subsurface temporary or permanent facility. 2. Survey and record the size, location, elevation, and alignment of potholed existing underground utilities and other facilities for inclusion in record drawings. C. Do not proceed with excavation or other subsurface work until surrounding utilities and underground facilities have been located by potholing or other positive means. Determine the method and equipment required to perform potholing without damage to existing facilities. At minimum, utilize hand digging in the vicinity of high risk utilities and where recommended by USA guidelines. D. Immediately notify the Engineer of utilities or underground facilities located with less than one (1) foot of clearance to the nearest point of proposed trenching, excavation, shoring, pile or other subsurface temporary or permanent facility. E. Backfill potholes and exploratory excavations, and replace in kind any improvements removed during the potholing operation including pavement, curbs, sidewalks, or other improvements. 1.05 UTILITY CONTACT LIST A. The following list of utility contacts is not intended as a comprehensive list and is provided as a convenience to the Contractor. Utility Company Name Contact Name Telephone San Mateo Waterlines California Water Service Company (650) 348-1808 Foster City Waterline Bayshore Office Dispatch (650) 286-8140 PG&E San Mateo Station (650) 434-0809 San Mateo Storm Drains Dispatch Line (650) 522-7350 San Mateo Sanitary Sewers Dispatch Line (650) 522-7350 Foster City Sanitary Sewers Dispatch Line (650) 286-8140 Comcast CATV n/a CITY OF SAN MATEO Bayfront Levee Improvements 1 Section 01010 Page 3 1 1 1 1 1 1 1 1 1 1 UTILITY COORDINATION SECTION 01047 1.06 WORK BY UTILITY OWNERS A. Certain utilities may be relocated by the affected utility companies prior to or during the Work of the Contract. B. Contractor will be notified of any known relocation work. 1.07 HIGH RISK FACILITIES A. If the existence of certain underground or overhead facilities referred to herein as "high risk" facilities, is indicated in the Contract Documents, take special precautions to protect the health, safety and welfare of workers and of the public. High risk facilities requiring special precautions include: conductors of petroleum products, oxygen, chlorine, and toxic or flammable gases; natural gas in pipelines greater than 6 inches in diameter or pipelines operating at pressures greater than 60 pounds per square inch (gage); underground electric supply system conductors or cables, with potential to ground of more than 300 V, either directly buried or in a duct or conduit which do not have concentric grounded or other effectively grounded metal shields or sheaths. B. If these high risk facilities are not located on the Contract Drawings in both alignment and elevation, perform no work in the vicinity of the facilities until the facility's owner or the owner's representative has located and identified the facility by potholing, probing or other means. C. HIGH RISK UNDERGROUND UTILITIES 1. Underground utilities are located immediately adjacent to work areas at the general locations shown on the Plans. Utility locations and depths are approximate, based on record information, and are not guaranteed. The Contractor shall have all existing utilities adjacent to work areas located and marked prior to excavation. The Contractor shall pothole high risk underground utilities that are immediately adjacent to work areas, in addition to special pothole areas indicated on the Plans. 2. The Contractor shall note the existence of a four -conduit 3 -phase, 22,000 - volt underground electric line adjacent to proposed work at the East End Levee. This high voltage electric utility shall not be de -energized or otherwise disturbed during the course of construction. The intent of the project plans is to protect this utility in place throughout construction with no shutdown. 3. Within twenty working days of the Notice to Proceed, Contractor shall prepare and submit a detailed plan for utility protection throughout the duration of the work. Contractor shall contact Peter Siu (650-598-7241, PxSo@pge.com) to obtain PG&E requirements for the protection of 2,000 kVA and greater facilities and Carol Van Huizen (650-598-7378, CaVa@pge.com) to obtain PG&E requirements for the projection of facilities smaller than 2,000 KVA. The costs for any utility disruption shall be born solely by the Contractor. CITY OF SAN MATEO Bayfront Levee Improvements Section 01047 Page 4 UTILITY COORDINATION SECTION 01047 1 1 1 I 1 1 1 1 t 1 D. OVERHEAD ELECTRIC UTILITIES 1. High voltage overhead power transmission utilities are present at the project work sites as shown on the plans. 2 Contractor shall consider the proximity of overhead electric utilities when bidding and no additional compensation shall be made for additional work necessitated by the presence of overhead electric utilities (smaller equipment, etc). 3. Contractor shall insure a minimum clearance between the power lines and the work at all times as dictated by OSHA and PG&E regulations. PART 2 PRODUCTS Not Used. PART 3 EXECUTION Not Used. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 01010 Page 5 I I I I I I I I I I I I I I I I I UTILITY COORDINATION SECTION 01047 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 01047 Page 6 1 1 1 p 1 1 1 1 I 1 1 SECTION 01120 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES PART 1 GENERAL 1.01 DESCRIPTION A. Section includes description of existing site conditions, general requirements and procedures for work in the presence of hazardous materials, development and implementation of the Contractor's Hazardous Materials Site -Specific Health and Safety Plan (HMSSHASP), and requirements for personal protective equipment, training, and monitoring. B. Requirements of this section apply to the Work or any portion thereof which involves disturbance of or exposure to hazardous materials. 1.02 DEFINITIONS A. Hazardous Materials: Materials consisting of or containing any substances defined, regulated or listed as hazardous substances, hazardous materials, hazardous wastes, health hazards, toxic waste, pollutant or toxic substances or similarly identified as hazardous to human health or the environment in or pursuant to CERCLA, the Hazardous Materials Transportation Act, RCRA, the Clean Water Act, California Health and Safety Code, the Clean Air Act, the California Water Code or any other appropriate regulation or law including without limitation friable asbestos, polychlorinated biphenyls, petroleum, natural gas and synthetic fuel products and by-products. B. Personal Protective Equipment (PPE): Individually donned equipment and clothing used in conjunction with appropriate engineering controls and work practices to protect project workers from unacceptable risk related to the handling of soil, building material, or groundwater impacted with hazardous materials. C. Training and Personnel Monitoring — Labor, materials, equipment, and analyses, utilized to provide appropriate baseline and ongoing training, communication, and verification, including medical surveillance (if needed), of conditions related to employee exposure to hazardous materials. D. Hazardous Materials Site -Specific Health and Safety Plan (HMSSHASP): A site - specific plan which addresses the safety and health hazards of each phase of site operations and includes the requirements and procedures for employee protection. 1.03 SUBMITTALS A. Hazardous Materials Site -Specific Health and Safety Plan (HMSSHASP): Submit for acceptance by the Engineer within 21 days after Notice to Proceed. CITY OF SAN MATEO Bayfront Levee Improvements Section 01120 Page 1 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES SECTION 01120 1 1 1 1 1 1 1 1 1 1 B. Amendments: Submit amendments to the HMSSHASP for review and acceptance by the Engineer as they occur. 1.04 EXISTING SITE CONDITIONS A. The work site is situated adjacent to the San Mateo bay front, which is located within an urban area proximate to potential current and historic sources of hazardous material impacts to soil and groundwater. B. Contaminated Material: 1. The Contractor may encounter contaminated soil or ground water when performing work at the project sites shown on the Plans, although substantial contamination is not anticipated based on earlier research and testing. a. Residual petroleum hydrocarbons from maintenance activities in the trucking yards adjacent to Seal Slough have been discovered in site soil and/or water. Motor oil levels may be above environmental screening levels and soil so contaminated with motor oil could require disposal at a Class 2 landfill (non -hazardous). However, it is suspected that some of the apparent motor oil is due to bay mud organics interfering with the test results, and the hydrocarbons are naturally occurring. b. Residual pesticides from spraying activities near the levee slopes may be discovered in site soil and/or water. C. Reference material: 1. Reference material containing preliminary hazardous materials screening for the project sites is available as described in Section 01010. 1.05 GENERAL REQUIREMENTS A. No work that disturbs existing structures, soil, or groundwater containing hazardous materials shall be performed until the Hazardous Substance Site - Specific Health and Safety Plan is reviewed and accepted by the Engineer. B. Documentation: 1. Maintain logs on -site of monitoring equipment calibration. 2. Maintain logs on -site of the results of field monitoring measurements. 3. Maintain copies on -site of any laboratory analytical results associated with health and safety monitoring. C. Contractor shall comply with the following general work practices: 1. Do not smoke, chew gum, apply cosmetics or consume food and beverages in areas where hazardous materials are being handled. 2. Wash hands thoroughly before eating, smoking, or drinking. CITY OF SAN MATEO Bayfront Levee Improvements Section 01120 Page 2 1 1 1 1 1 1 1 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES SECTION 01120 3. Do not store food in areas where it may come in contact with hazardous materials, including soil and dusts. 4. To the extent practical, stay upwind from operations that emit vapors, gases or particulates. 5. Clean clothing and footwear upon leaving jobsite and prior to entering any vehicle, mobile equipment, or office. 6. Clean vehicle interiors and hand held tools as needed to prevent accumulation of particulates. D. Follow guidelines for the selection and use of proper personal protective equipment as outlined in the applicable job safety or task hazard analysis from the Hazardous Material Site Specific Health and Safety Plan. At a minimum all Contractor personnel that may come into contact with site soils shall be suitably dressed to perform their work in a safe manner that minimizes exposure to soil and does not interfere with their hearing, vision or free use of their hands or feet. The following minimum PPE shall be worn by all Contractor employees who may come into contact with site soils: 1. Waist length shirts with sleeves. 2. Trousers covering the entire leg. 3. Work boots. 4. Eye protection meeting the latest American National Standard for Occupational and Educational eye and face protection. 5. Work gloves when handling soil or hand tools in contact with soil. 6. Additional equipment may modify this minimum requirement and, if required, will be outlined in the Hazardous Material Site Specific Safety and Health Plan as part of the job safety or task hazard analysis. E. Use equipment, in addition to the minimum outlined herein, if listed in the Hazardous Material Site Specific Safety and Health Plan as part of the job safety or task hazard analysis. 1.06 HAZARDOUS MATERIALS SITE -SPECIFIC HEALTH AND SAFETY PLAN A. Prepare a Hazardous Materials Site -Specific Health and Safety Plan (HMSSHASP) for all site personnel in accordance with the federal OSHA, and Cal/OSHA regulations. 1. The Plan shall include: a. Provisions specific to handling soils and ballast containing elevated concentrations of petroleum hydrocarbons, poly -nuclear aromatic hydrocarbons, and the metals lead and arsenic. b. Additional information or procedures as determined necessary by the Contractor for safe performance of work in the presence of hazardous materials. CITY OF SAN MATEO Bayfront Levee Improvements Section 01120 Page 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES SECTION 01120 B. Implement the HMSSHASP, including use of engineering controls, providing its site personnel with the appropriate training and monitoring and personal protective equipment (PPE) based upon the type of work to be performed and the associated hazard, and ensuring proper use of PPE and compliance with safe work practices. The Contractor shall perform all monitoring necessary to determine the ongoing appropriate level of PPE for the work. C. The Engineer will have the authority to stop work if, in the opinion of the Engineer, the level of PPE selected by the Contractor is not appropriate or site personnel are not complying with the requirements of the HMSSHASP. 1.07 UNKNOWN HAZARDOUS MATERIALS A. When the presence of hazardous materials are not indicated in the Contract Documents and the Contractor encounters materials, including groundwater, which the Contractor reasonably believes to be hazardous and the hazardous materials have not been rendered harmless, the Contractor shall immediately cease work in the affected area and report the condition to the Engineer in writing. The Contractor may continue work in unaffected areas reasonably believed to be safe. B. The Engineer will direct the Contractor as to sampling, testing, disposal and/or remedial work that might take place either through the Contractor's forces or City's own forces or an authorized agent. If the consequent delay of work in the affected area delays a current controlling operation, the delay will be considered in accordance with Section 6-6 of the Standard Specifications as modified by the Special Provisions. PART 2 PRODUCTS Not Used. PART 3 EXECUTION 3.01 HAZARDOUS MATERIAL AND WASTE MANAGEMENT A. Storage: The Contractor shall label and store all hazardous materials used during construction, such as pesticides, paints, thinners, solvents, and fuels; and all hazardous wastes, such as waste oil and antifreeze; in accordance with the City of San Mateo Hazardous Materials Storage Ordinance and all applicable State and Federal regulations. 1. The Contractor shall store all hazardous materials and all hazardous wastes in accordance with secondary containment regulations, and it is recommended that these materials and wastes be covered, as needed, to avoid potential management of collected rain water as a hazardous waste. 2. The Contractor shall keep an accurate, up-to-date inventory, including, but not limited to, Material Safety Data Sheets (MSDSs) of hazardous CITY OF SAN MATEO Bayfront Levee Improvements Section 01120 Page 4 1 1 1 1 1 1 1 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES SECTION 01120 materials and hazardous wastes stored on -site, to assist emergency response personnel in the event of a hazardous materials incident. B. Usage: When rain forecast within 24 hours or during wet weather, the Engineer may prevent the Contractor from applying chemicals in outside areas. The Contractor shall follow material manufacturer's instructions regarding uses, protective equipment, ventilation, flammability, and mixing of chemicals. C. Disposal: The Contractor shall arrange for regular hazardous waste collection to comply with time limits on storage of hazardous wastes. The Contractor shall dispose of hazardous waste only at authorized and permitted Treatment, Storage, and Disposal Facilities, and use only licensed hazardous waste haulers to remove the waste off -site, unless quantities to be transported are below applicable threshold limits for transportation specified in State and Federal regulations. Contractor shall ensure that City receives a copy of the Uniform Hazardous Waste Manifest form completed by the hazardous waste facility that accepted said materials. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 01120 Page 5 HAZARDOUS MATERIALS CONDITIONS AND PROCEDURES SECTION 01120 1 1 1 1 1 t 1 1 1 1 1 1 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 01120 Page 6 SECTION 01500 CONSTRUCTION FACILITIES PART 1 GENERAL 1.01 SCOPE A. The Contractor shall provide all temporary facilities and utilities required for prosecution of the work, protection of employees and the public, protection of the work from damage by fire, weather or vandalism, and such other facilities as may be specified or required by any legally applicable law, ordinance, rule, or regulation. 1 1 1 1 1 1 1.02 TEMPORARY UTILITIES A. Electrical Service - The Contractor shall arrange, at its own cost, with the local utility to provide adequate temporary electrical service at a mutually agreeable location. The Contractor shall then provide adequate jobsite distribution facilities conforming to applicable codes and safety regulations. The Contractor shall provide, at its own cost, all electric power required for construction, testing, general and security lighting, and all other purposes whether supplied through temporary or permanent facilities. B. Water - The Contractor shall pay for and shall construct all facilities necessary to furnish water for its use during construction. Water used for human consumption shall be kept free from contamination and shall conform to the requirements of the State and local authorities for potable water. The Contractor shall pay for all water used for the Contractor's operations prior to final acceptance. C. Heating and Ventilation - The Contractor shall provide means for heating and ventilating all work areas as may be required to protect the Work from damage by freezing, high temperatures, weather, or to provide a safe environment for workers. Unvented direct fired heaters shall not be used in areas where freshly placed concrete will be exposed to the combustion gases until at least two hours after the concrete has attained its initial set. D. Sanitary Conveniences - The Contractor shall provide suitable and adequate sanitary conveniences for the use of all persons at the site of the Work. Such conveniences shall include chemical toilets or water closets and shall be located at appropriate locations at the site of the Work. All sanitary conveniences shall conform to the regulations of the public authority having jurisdiction over such matters. At the completion of the Work, all such sanitary conveniences shall be removed and the site left in a sanitary condition. 1.03 CONSTRUCTION FACILITIES A. Construction hoists, elevators, scaffolds, stages, shoring, and similar temporary facilities shall be of ample size and capacity to adequately support and move the CITY OF SAN MATEO Bayfront Levee Improvements Section 01500 Page 1 1 1 1 1 1 1 1 1 1 CONSTRUCTION FACILITIES SECTION 01500 loads to which they will be subjected. Railings, enclosures, safety devices, and controls required by law or for adequate protection of life and property shall be provided. B. Staging and Falsework - Temporary supports shall be designed by a professional registered engineer with an adequate safety factor to assure adequate load bearing capability. If requested by the City's Representative, the Contractor shall submit design calculations for staging and shoring prior to application of loads. C. Excavation support shall be in accordance with Section 02260. 1.04 PROTECTION OF EXISTING FACILITIES A. The Contractor shall be responsible for the protection of public and private property at and adjacent to the Work and shall exercise due caution to avoid damage to such property. B. The Contractor shall repair or replace all existing improvements which are not designated for removal (e.g., curbs, sidewalks, survey points, fences, walls, signs, utility installations, pavements, structures,. etc.) and are damaged or removed as a result of its operations. Repairs and replacements shall be at least equal to existing improvements and shall match them in finish and dimension. C. Trees, lawns, and shrubbery that are not to be removed shall be protected from damage or injury. If damaged or removed because of the Contractor's operations, they shall be restored or replaced in as nearly the original conditions and location as is reasonably possible. Lawns shall be re -seeded and covered with suitable mulch. D. The Contractor shall give reasonable notice to occupants of adjacent property to permit them to salvage or relocate plants, trees, fences, sprinklers, and other improvements which would be destroyed because of the Work. 1.05 SITE SAFETY A. Temporary Enclosures - When sandblasting, spray painting, spraying of insulation, or other activities inconveniencing or dangerous to property or the health of employees or the public are in progress, the area of activity shall be enclosed adequately to contain the dust, over -spray, or other hazard. In the event there are no permanent enclosures of the area, or such enclosures are incomplete or inadequate, the Contractor shall provide suitable temporary enclosures. B. Warning Devices and Barricades - The Contractor shall adequately identify and guard all hazardous areas and conditions by visual warning devices and, where necessary, physical barriers. Such devices shall, as a minimum, conform to the requirements of Cal/OSHA. CITY OF SAN MATEO Bayfront Levee Improvements Section 01500 Page 2 CONSTRUCTION FACILITIES SECTION 01500 1.06 PROJECT SECURITY A. The Contractor shall make adequate provision for the protection of the Work area against fire, theft, and vandalism, and for the protection of the public against exposure to injury. PART 2 PRODUCTS 2.01 FIRE EXTINGUISHERS A. A sufficient number of fire extinguishers of the type and capacity required to protect the Work and ancillary facilities, shall be provided and maintained in readily accessible locations. 1 1 1 1 1 I 1 1 t 1 I 1 2.02 TEMPORARY SITE FENCES A. The Contractor shall protect the Work and temporary facilities against acts of theft, violence, or vandalism, using temporary site fences as necessary. B. Temporary openings in existing fences shall be protected to prevent intrusion by unauthorized persons. During night hours, weekends, holidays, and other times when no work is performed at the site, the Contractor shall provide temporary closures or guard service to protect such openings. Temporary openings shall be fenced when no longer necessary. 2.03 PROJECT SIGNS A. Provide and maintain project identification signs at each of the four work sites, with exhibit lettering by professional sign painter. 1. Said sign shall be posted at least five feet above ground level, and shall be of a white background, with black lettering that is a minimum of two inches in height. 2. List at least the title of the Project, and names of the City, Design Engineer and Contractor, and approximate duration of construction. 3. Conspicuously list the name and telephone number of the City's "Disturbance Coordinator" as provided by the City. B. Provide and post a sign at all entrances to the construction site upon commencement of construction, for the purpose of informing all contractors and subcontractors, their employees, agents, material suppliers and all other persons at the construction site, of the basic requirements of the City's Noise Ordinance (San Mateo Municipal Code Chapter 7.30). Said sign shall read as follows: CONSTRUCTION HOURS (Includes Any and All Deliveries) MONDAY - FRIDAY 8:00 a.m. to 5:00 p.m. SATURDAY 8:00 a.m. to 5:00 p.m. SUNDAY/HOLIDAYS Construction prohibited. Violation of this Ordinance is an infraction punishable by a fine up to $500 per conviction. Violators will be prosecuted. S.M.M.C. §1.04.010. CITY OF SAN MATEO Bayfront Levee Improvements Section 01500 Page 3 CONSTRUCTION FACILITIES SECTION 01500 C. Erect project signs where directed by Engineer. D. Engineer shall review project sign data prior to installation. PART 3 EXECUTION 3.01 MAINTAINING SITE ACCESS A. Existing and temporary access roads shall be maintained to all existing facilities on the site of the Work to provide access for delivery of material and for maintenance and operation. 1 1 1 1 1 1 B. Where such temporary roads cross buried utilities that might be injured by the loads likely to be imposed, such utilities shall be adequately protected by steel plates or wood planking, or bridges shall be provided so that no loads shall discharge on such buried utilities. C. Under no circumstances are access roads to be created within identified environmentally sensitive areas. D. Contractor shall coordinate with the City to provide reasonable access to adjacent properties during construction activities. 3.02 PARKING AND STORAGE AREAS A. All stockpiled materials and parked equipment at the job site shall be confined to approved areas of use and located so as to avoid surcharging Bay Mud, interference with private property and to present hazards to the public. B. Locations of stockpiles, parking areas, and equipment storage must be approved by the City. Pre -approved stockpile and construction staging areas are provided in Appendix II. C. Contractor is prohibited from storing equipment, backfill or off -haul within Foster City and is prohibited from parking construction equipment within Foster City. 3.03 TRAFFIC CONTROL A. The Plans show a traffic detour plan and conditions that must be met during construction. The Contractor may use or modify this plan, subject to review by the City. The Contractor's use of the traffic detour plan does not relieve him of the requirement to produce and submit a detailed traffic control plan. B. The Contractor shall take all necessary steps to minimize inconvenience to the general public throughout all work under this Contract. No driveways or private roads shall be blocked without notifying the property owner and access must be restored during all non -working hours. Safe access must be maintained for pedestrian traffic throughout the work area at all times. C. At least one lane of traffic in each direction must be kept open at all times on public roads unless prior approval is provided by the City and any affected CITY OF SAN MATEO Bayfront Levee Improvements Section 01500 Page 4 1 I 1 1 1 1 1 CONSTRUCTION FACILITIES SECTION 01500 agency. No roads shall be blocked or made inaccessible, due to Contractor's work, without prior written approval of the City and the affected agencies. D. The Contractor shall not block or obstruct fire lanes at any time. E. Haul Routes - At the pre -construction conference, the Contractor shall submit for approval the proposed route(s) for all construction traffic on the project. This shall include any designated routes, if any, shown on the Contract Plans. Upon approval, the Contractor shall strictly adhere to that route(s) only, unless written permission is obtained to change the route(s). Pre -approved truck routes are provided in Appendix II. F. Traffic control shall be in accordance with the California Department of Transportation Traffic Manual and the Plans. The Contractor shall submit for approval, by the City and any other applicable agency, its traffic control plans prior to work on public streets. G. Traffic control shall include signs, warning lights, reflectors, barriers, and other necessary safety devices and measures, including sufficient flaggers to direct vehicular traffic through the construction areas. H. No material or equipment shall be stored or parked where it will interfere with the free and safe passage of public traffic, and at the end of each day's work, and at other times when construction operations are suspended for any reason, the Contractor shall remove all equipment and other obstructions from the public right-of-way. I. Should the Contractor appear to be negligent in furnishing warning and protective measures, as above provided, the Engineer may direct attention to the existence of a hazard, and the necessary warning and protective measures shall be furnished and installed by the Contractor at his expense. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 01500 Page 5 I I I I I I I I I I I I I I I CONSTRUCTION FACILITIES SECTION 01500 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 01500 Page 6 1 1 1 t 1 1 1 1 1 1 1 SECTION 01600 ENVIRONMENTAL PROTECTION PART 1 GENERAL 1.01 SPECIAL ENVIRONMENTAL RESTRICTIONS A. Construction activities may be constrained by the presence of nesting birds in the months of February through August. City will monitor bird populations under separate contract; disruptions to construction caused by the presence of nesting birds will be treated as an excusable delay and a time extension will be granted as provided for in the General and Special Provisions. B. No construction within the San Mateo Creek Mouth work site shall take place within the winter steelhead migration seasonal period defined as October 16 through May 31 in each calendar year. C. Measures Specific to the Protection of the California Clapper Rail: 1. All Contractor personnel working at the site shall attend a 30 minute environmental protection training session prior to the commencement of work. Personnel will sign an attendance sheet provided by the City. 2. The Contractor shall designate a representative(s) (.e.g. the foreman) who will stop work and contact the Engineer and Biologist if a California clapper rail is found in the work area. 3. Hand tools shall be utilized to remove vegetation in all areas subject to ground disturbing activities within clapper rail habitat (i.e. at the Seal Slough and East End Levee sites). These areas shall be cleared prior to the start of construction activities under the supervision of the Biologist. All plant materials removed from these sites shall be collected and disposed of at an appropriate off -site location. a. Contractor shall notify Biologist at least 48 hours prior to any plant clearing activities. 4. At the East End Levee Site, to minimize or avoid the loss of individual clapper rails, the Engineer may direct the Contractor to cease construction activities within two hours before or after extreme high tides at the site. a. The City will monitor predicted tides and direct the Contractor. b. For the Contractor's information extreme tide will be considered 7.6 feet MLLW or greater at the west end of the San Mateo Bridge, which is equivalent to 6.5 feet MLLW as measured at the Golden Gate Bridge. c. The Contractor is responsible for tracking daily predicted tides and using this information in his construction scheduling. 5. If a California Clapper Rail is killed or injured by workers under the Contractor's control, or a dead or injured CCR is discovered during the CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 1 1 1 1 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 course of the Contractor's operations, the Contractor shall cease all work at that site and immediately notify the Engineer. a. Any dead or injured animal will be left alone until the Department of Fish and Game arrives. 1.02 REGULATORY REQUIREMENTS A. These specifications reflect regulatory permit requirements known at the time of bidding. B. Actual permits obtained by the City after the acceptance of bids may contain additional constraints on the Contractor's work sequence and timing. These constraints shall be incorporated into the Contractor's schedule and work plan as they become known. C. If there is a conflict with any provision of the Contract Documents and permit requirements, the more stringent requirement shall govern the prosecution of work. Contractor shall call significant differences between permit conditions and these specifications to the attention of the Engineer. D. Representatives of the regulatory agencies that have issued permits shall be allowed access to all parts of the construction work. E. Contractor shall adhere to all related requirements set forth in the State Water Resources Control Board NPDES General Permit Requirements (Order No. 2009-0009-DWQ) for Risk Level 2 sites. Permit requirements (Order No. 2009- 0009-DWQ) are available for download on the State Water Resource Control Board's website (http://www.waterboards.ca.gov). PART 2 PRODUCTS 2.01 ENVIRONMENTALLY SENSITIVE AREA (ESA) FENCING A. Contractor shall install ESA fence as shown on the Drawings and as directed by the Biologist to ensure that construction is restricted to the intended work area and that adjacent native vegetation is protected from potential construction related damage. B. The ESA fence will consist of orange, plastic mesh construction fencing to serve as a visual demarcation of construction limits for the construction crew and equipment. C. Fabric shall consist of 4 -foot tall orange plastic construction fencing. Where not supported by existing fencing as shown on the Drawings, ESA fence support posts shall be steel T -posts (#133) 6 feet minimum in length. Heavyweight plastic ratchet ties shall be used to fasten the ESA fabric to the posts or existing fencing where weaving of fabric over the post is not possible or practical. CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 2 1 i 1 1 1 1 1 I 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 2.02 SILT FENCING A. Contractor shall install silt fences as shown on the Drawings and as directed by the Engineer to ensure that construction is restricted to the intended work area and that soils eroded from the work area are not transported off -site via run-off. B. Fabric shall be pre -fabricated woven geotextile fabric manufactured for siltation fencing. Where not supported by existing fencing as shown on the Drawings, stakes shall be oak and a minimum of 1.125 inches square by 52 inches long. Fabric and stakes are available from Reed & Graham, Inc. Geosynthetics (1- 888-381-0800) or equal as approved by the Biologist. 2.03 FLOATING TURBIDITY CURTAIN A. A floating turbidity (aka silt) curtain shall be used at the Seal Slough fill site to prevent sediments disturbed during construction from being released into greater Seal Slough or San Francisco Bay. The floating turbidity curtain will remain in place until affected disturbed slopes have erosion control fabric installed. B. Floatation shall consist of a series of expanded polyethylene logs, enclosed in PVC coated nylon or polyester having 400 lbs. minimum tensile strength. The curtain shall be permanently attached to the bottom of the floatation unit and weighed down with a galvanized chain ballast or similar. Curtain material shall be slit film woven polypropylene or monofilament woven polypropylene. C. Floating turbidity curtain shall be similar to Boom Environmental Products as manufactured by Geotechnical Supply, Inc. of New Bedford, MA. (800-770- 2666) D. Floating turbidity curtain shall be repaired or replaced immediately upon failure. PART 3 EXECUTION 3.01 SITE PROTECTION A. All site protection measures described herein, including stormwater pollution prevention and habitat protection as described in the Special Provisions, shall be maintained in place continuously for the duration of construction. B. The Contractor shall maintain a controlled and stable work area at all times. The Contractor is responsible to take those measures needed to control site runoff and soil disturbance, including the placement of temporary aggregate base course at work sites to prevent soil erosion during construction as required.. 3.02 DUST CONTROL A. The Contractor at its expense shall take whatever steps, procedures, or means as are required to prevent abnormal dust conditions being caused by its operations in connection with the execution of the Work; and on any unpaved CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 3 1 1 1 1 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 road which the Contractor or any of its subcontractors are using, excavation or fill areas, demolition operations, or other activities. Control shall be by sprinkling, use of dust palliatives, modification of operations, or any other means acceptable to agencies having jurisdiction. Haul routes shall be kept visibly wet during excavation and hauling operations. B. Unless the construction dictates otherwise, and unless otherwise approved by the City's Representative, the Contractor shall furnish and operate a self -loading motor sweeper with spray nozzle at least once each working day to keep paved areas acceptably clean whenever construction, including restoration, is incomplete. C. Vehicles driving on dirt areas will travel at speeds no greater than 10 mph to minimize noise and dust disturbance. D. Cover all trucks hauling soil, sand, and other loose materials or require trucks to maintain at least two feet of freeboard above the load. 3.03 NOISE ABATEMENT A. Operations at the work sites shall be performed so as to minimize unnecessary noise. Special measures shall be taken to suppress noise during any approved working hour variances. Noise levels due to construction activity shall not exceed the levels specified by local ordinance. B. Internal combustion engines used on the Work shall be equipped with a muffler of a type recommended by the manufacturer. No internal combustion engine shall be operated without said muffler. C. All noise generating activity shall comply with City of San Mateo Ordinance 23.06.017. D. The City will designate a "disturbance coordinator" who is responsible for responding to any local complaints about construction noise and/or vibration. The City may require that the Contractor take reasonable measures to correct the problem, especially if the Contractor is in violation of the noise ordinance. 3.04 INSTALLATION OF ESA AND SILT FENCING A. ESA and silt fencing materials shall be as specified herein. B. ESA fencing and habitat protection shall be as specified in SP -7-8.8. C. The Engineer will monitor silt fencing for effectiveness (see also Section 3.08). Should the installed silt fencing prove to be an ineffective means of runoff pollution control as measured below, the Contractor shall replace silt fencing as required until adequate pollution control is achieved. CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 4 1 1 1 1 1 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 3.05 REMOVAL OF SEDIMENT CONTROLS A. The Contractor shall remove ESA, silt fencing and the turbidity curtain at the end of construction. B. All spoil material trapped behind sediment controls shall be disposed of off -site in conformance with all applicable regulatory requirements. 3.06 MAINTAINING WORK AREAS A. The Contractor shall, at all times, keep property on which work is in progress and the adjacent property free from accumulations of waste material or rubbish caused by employees or by the Work. All surplus material shall be removed from the site immediately after completion of the work causing the surplus materials. Upon completion of the construction, the Contractor shall remove all temporary structures, rubbish, and waste materials resulting from its operations. B. This provision also applies to any material stockpile and equipment storage areas. C. All equipment (including personal gear) will be cleaned of soil, seeds, and plant material prior to arriving on -site and after working in areas with invasive non- native plants, such as perennial pepperweed (Lepidium tantalum), to prevent the spread of weeds. D. All stockpiled materials not actively being used shall be covered. All chemicals shall be stored in watertight containers (with appropriate secondary containment to prevent any spillage or leakage) or in a storage shed. All waste containers shall be covered at the end of each day and before rain events. E. Concrete transit mixers shall only be washed out in designated wash -out areas where the water will flow into a temporary pit in dirt area or onto stockpiles of aggregate base or sand. Concrete washouts must be water tight. F. Poured concrete and sealants shall be excluded from San Mateo Creek and Seal Slough and San Francisco Bay for 30 days after the pour. G. No timbers or other wood pressure treated with or containing creosote shall be used during construction. 3.07 EQUIPMENT AND VEHICLE REFUELING A. Contractor shall prepare and implement a spill prevention and response plan for refueling equipment, machinery and vehicles at the project site. 1. Submit to Engineer for review prior to beginning any refueling activity. B. Machinery, vehicles and construction equipment shall not be refueled within 60 feet of any aquatic habitat as identified by ESA fencing on the Drawings. CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 5 1 I I 1 1 1 I 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 3.08 DISPOSAL OF MATERIAL A. The Contractor shall make arrangements for disposing of materials outside the Site and the Contractor shall pay all costs involved. The Contractor shall first obtain permission from the property owner on whose property the disposal is to be made and absolve the City from any and all responsibility in connection with the disposal of material on said property. When material is disposed of as provided above, the Contractor shall conform to all required codes pertaining to grading, hauling, and filling of earth. B. This provision also applies to any material stockpile and equipment storage areas. C. During the course of construction activities, all trash and debris shall be collected in trash receptacles with a tightly secured lid to prevent attracting predators to the site. All trash cans shall be removed and emptied at an appropriate facility once per week at minimum. If no garbage receptacles are available, all debris including food wrappers and drink containers shall be collected and removed from the area on a daily basis for disposal at an appropriate facility. 3.09 TEMPORARY FLOOD PROTECTION A. Contractor shall provide temporary flood protection against inundation from high tides in San Francisco Bay whenever and wherever existing flood protection elevations are lowered below 107.5 feet on the Project datum. B. Where the elevation of existing flood protection structures is less than 107.5 feet; temporary flood protection to elevation 107.5 feet shall be provided whenever and wherever the elevation of existing flood protection structures are lowered below existing elevations. C. Methods used to provide temporary flood protection during construction at the various work sites are solely at the discretion of the Contractor, insofar as those methods are in accordance with relevant provisions of the Safety Orders, subject to the Engineer's review. 1. Conform to flood barrier manufacturer's instructions when deploying commercial systems. 2. Flood barriers shall not be deployed within environmentally sensitive areas identified on the Plans or fenced in the field. 3. Flood barrier locations are subject to review and approval by the Engineer. 4. All facilities constructed to protect excavations and/or provide a temporary flood barrier during construction are temporary, the property of the Contractor, and shall be removed from the project site upon completion of all work necessitating the barrier. 5. The site of each temporary flood barrier shall be restored to its pre-existing condition as directed by the Engineer. CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 6 1 1 t 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 3.10 SITE CONTROL DURING INCLEMENT WEATHER A. The Contractor is solely responsible for site protection during periods of inclement weather. B. All construction activity with the potential to cause erosion, sedimentation, or water pollution shall be suspended during periods of inclement weather. 1. Inclement weather is defined as a rain event with a forecasted probability of 50% or greater of measurable (0.01 inch or more) rainfall. 2. The contractor is responsible for keeping track of upcoming inclement weather and must obtain the precipitation forecast information from the National Weather Service Forecast Office (http://www.srh.noaa.gov/). 3. Contractor shall notify the City 48 hours prior to forecast inclement weather. 4. Contractor shall develop a Rain Event Action Plan (REAP) 48 hours prior to any likely precipitation event forecast of 50% or greater probability. The REAP shall be a written document, specific for each rain event and shall be designed to protect all exposed portions of the site. REAP shall contain all information outlined in the State Water Resources Control Board NPDES General Permit Requirements (Order No_ 2009-0009-DWQ) for Risk Level 2 sites. Permit requirements are available for download on the State Water Resource Control Board's.website (http://www.waterboards.ca.gov). 5. Contractor shall begin implementation and make the REAP available onsite no later than 24 hours prior to the likely precipitation event. a. If a defined rain event is forecast for a weekend or holiday, all site protection shall be deployed and in place before the Contractor stops work prior to that weekend or holiday. b. The Contractor has discretion as to how he runs his operations while maintaining an adequately protected site at the onset of rainfall. 3.11 WATER POLLUTION MONITORING A. The City will monitor the Contractor's operations and site maintenance to ensure compliance with the NPDES General Construction Permit and other regulatory requirements. B. During discharge events the City will sample site runoff for the following constituents and compare to Regional Water Quality Control Board numeric effluent limits (NELs): 1. Turbidity: Maximum turbidity measured in runoff leaving the construction sites will not be allowed to exceed 250 NTU (roughly equivalent to 750 mg/I). 2. pH: Measured pH runoff leaving the construction sites must be between 6.5 and 8.5 pH units. CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 7 1 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 C. If effluent limits are exceeded during a discharge event, all work shall cease and the Engineer will direct the Contractor to employ other housekeeping and pollution control measures until compliance is reached. D. The contractor is responsible for maintaining the identified effluent limits for all runoff leaving the construction site. No exceptions will be made for poor quality run-on water. 3.12 FINES FOR PERMIT VIOLATION A. Contractor is responsible for all permit violation fines and necessary corrective actions due to his negligence. B. NPDES permit violation fines will be identified within the permit language. Typical fines per violation are: 1. Maximum of $10,000/day and $10/gallon over 1000 gallons discharged 2. Minimum mandatory penalties of $3,000 per violation 3:13 DOCUMENTATION A. Contractor shall retain storm water monitoring and control and BMP records on - site while construction is ongoing. Documentation shall be well organized and shall contain the following items at a minimum: 1. Document all housekeeping BMPs in the SWPPP and REAP(s) in accordance with the nature and phase of the construction project. 2. Printed copies of all likely precipitation event forecast of 50% or greater probability during all phases of construction. 3. Copies of all storm water related inspection, sampling, and observation reports. 4. Records of any corrective actions and follow-up activities that resulted from analytical results, visual observations, or inspections. 3.14 ACCIDENTAL DISCOVERIES A. Significant cultural resources are not known to exist at the project sites. 1. In the event than an archaeological resource is found during construction, all construction work within a 50 -foot radius of the find shall be halted, and the Engineer notified. 2. A qualified archaeologist will be retained by the City to examine the find and a mitigation plan may be implemented. 3. Any resulting changes in the scope of work or time delays caused by the discovery of cultural resources shall be dealt with in conformance with these Contract Documents. B. In the event that human remains are encountered during excavation or backfilling activities, there shall be no further disturbance until the County Coroner has made the necessary findings as to origin and disposition. CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 8 1 1 1 1 1 1 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 1. Notify the Engineer immediately upon the discovery of possible human remains. 2. Do not resume work until so directed in writing. 3. If the remains are determined to be of Native American descent, the provisions of Section A above will apply. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 9 1 1 1 1 1 1 1 1 ENVIRONMENTAL PROTECTION SECTION 01600 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 01600 Page 10 1 1 1 1 1 1 1 1 1 1 1 1 SECTION 02200 SITE PREPARATION PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Clearing, grubbing, and stripping project site of all surface and subsurface deleterious materials as needed to prepare for the work. B. Related Sections: 1. Section 02354 - Hazardous Materials Procedures. 2. Section 02300 - Earthwork. 3. Section 02318 - Trenching. 1.02 DEFINITIONS A. Clearing: Consists of removal of natural obstructions and existing foundations, buildings, fences, lumber, walls, stumps, brush, weeds, rubbish, trees, boulders, utility lines, pavement, and any other items which shall interfere with construction operations or are designated for removal. B. Grubbing: Grubbing shall consist of the removal and disposal of wood or root matter below the ground surface remaining after clearing and shall include stumps, trunks, roots, or root systems greater than 1 inch in diameter or thickness. C. Stripping: Stripping shall include the removal and disposal of all organic sod, topsoil, grass and grass roots, and other objectionable material remaining after clearing and grubbing from the areas designated to be stripped. The depth of stripping is estimated to be 6 inches unless otherwise noted on the Plans, but the required depth of stripping will be determined by the Engineer. 1.03 QUALITY ASSURANCE A. Regulatory Requirements: Verify and comply with applicable regulations governing noise, dust, nuisance, drainage and runoff, fire protection, and disposal. B. Pre -construction Conference: Discuss order and method of work. 1.04 PROJECT CONDITIONS A. Environmental Requirements: 1. If suspected hazardous materials are found, comply with Section 02354 - Hazardous Materials Procedures. CITY OF SAN MATEO Bayfront Levee Improvements Section 02200 Page 1 1 1 1 1 1 1 1 I 1 1 1 I 1 1 1 SITE PREPARATION SECTION 02200 B. Existing Conditions: 1. Verify character and amount of clay, sand, gravel, quicksand, water, rock, hardpan, and other material involved and the work to be performed. C. The Contractor shall adhere to appropriate methods recommended by the Bay Area Air Quality Management District to minimize airborne pollution, including but not limited to frequent watering of open trenches, covering of excavated dirt and related actions. 1.05 SEQUENCING AND SCHEDULING A. Clearing and Grubbing: Perform clearing and grubbing in advance of grading operations. PART 2 PRODUCTS Not Used. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: The Contractor shall examine all work sites and verify existing conditions before beginning work. 3.02 PREPARATION A. Protect existing improvements from damage by site preparation work. Install protective fencing (e.g. ESA fencing) at the drip lines of trees that are to remain as so indicated on the Plans or directed by the Engineer. 3.03 INSTALLATION A. Clearing: 1. Clear areas where construction is to be performed and other areas as indicated on the Plans or specified in this Section of pavement, fences, lumber, walls, stumps, brush, roots, weeds, trees, shrubs, rubbish, and abandoned buried structures, utilities, irrigation lines and other objectionable material of any kind which, if left in place, would interfere with proper performance or completion of the work, would impair its subsequent use, or form obstructions therein. 2. Do not incorporate organic material from clearing and grubbing operations in fills and backfills. 3. Contractor's Construction Facilities: Fill or remove pits, fill, and other earthwork required for erection of facilities, upon completion of the work, and level to meet existing contours of adjacent ground. CITY OF SAN MATEO Bayfront Levee Improvements Section 02200 Page 2 SITE PREPARATION SECTION 02200 1 1 1 1 1 1 1 1 4. If existing structures to be cleared are supported on piles or piers, the piles or piers shall be cut off and removed to five feet below the bottom of proposed improvements. B. Grubbing: 1. From Excavated Areas: Grub stumps, roots, and other obstructions 1 inch or over in diameter to depth of not less than 36 inches below finish grade. 2. Backfill and compact cavities left below subgrade elevation by removal of stumps or roots to density of adjacent undisturbed soil. C. Stripping: 1. Remove soil material containing sod, grass, or other vegetation to depth of 6 inches from areas to receive fill or pavement and from area within 5 feet outside foundation walls or as shown on the Plans. 2. Deposit stripped material in accordance with following requirements: a. At locations designated as temporary spoils area. b. Reuse accepted material in top 6 inches of areas to be used for future planting as determined by the Biologist. D. Areas to be Filled Over Exposed Bay Mud 1. In areas where additional fill will be placed over exposed Bay Mud, the exposed Bay Mud shall be allowed to dry until a hard crust is formed. 2. Alternatively, the Contractor may follow procedures for fill over Bay Mud outlined in Section 02300-3.07 of these Specifications. 3.04 PRESERVATION OF PROPERTY A. The project area shall be cleared and grubbed only to the extent necessary to accommodate the work in conformance with the notes and details shown on the plans. Trees or growth shall not be trimmed back unnecessarily. B. Contractor shall take extreme care not to damage shrubs, trees, fences, irrigation systems and other improvements of adjacent property owners. C. All existing improvements not specifically designated on the plans to be removed or relocated shall remain in their original condition and location undisturbed. However, upon written permission by the Engineer, existing improvements may, for the convenience of the Contractor, and at his expense, be removed and temporarily relocated during construction and shall be replaced in their original location in as good or better condition as when the Contractor entered upon the work site 3.05 DEMOLITION OF SURFACE IMPROVEMENTS A. Removal of sidewalks, curbs and gutters, driveways, concrete slabs and pavement if necessary shall be in accordance with the provisions of Section 303 of the Standard Specifications. Curbs, gutters, sidewalks, driveways, slabs and CITY OF SAN MATEO Bayfront Levee Improvements Section 02200 Page 3 1 1 1 1 1 1 I 1 1 1 SITE PREPARATION SECTION 02200 pavement shall be removed by full depth saw cut to the nearest joint from the lines shown on the plans or as directed by the Engineer. B. Where the plans indicate construction under existing asphalt pavement or the replacement of existing asphalt pavement, the existing pavement shall be cut to neat lines using a full depth saw specifically made for asphalt cement, removed, and disposed of off -site. 3.06 ABANDONMENT OF UNUSED UTILITIES A. Cut off and remove pipe or conduit to point of abandonment. B. Completely fill abandoned pipe or conduit with lightweight controlled density fill in conformance with Section 02318-2.02. C. Backfill abandoned utility with engineered fill or lightweight engineered fill depending upon the type of fill shown on the Plans in the vicinity of the abandoned utility, in conformance with Section 02300-2.01; or lightweight controlled density fill in conformance with Section 02318-2.02. 3.07 REMOVAL OF DEBRIS A. All demolished and cleared material and equipment shall become the property of the Contractor and shall be legally disposed of by the Contractor. B. Demolished concrete shall not be buried in structure backfill areas. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02200 Page 4 1 1 1 1 I 1 1 1 1 1 1 1 1 SECTION 02260 EXCAVATION SUPPORT AND PROTECTION PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Requirements for designing, furnishing and installing, maintaining, and removing excavation support and protection. B. Related Sections: 1. SP -7-8.6 - Water Pollution Control. 2. Section 02300 - Earthwork. 1.02 REFERENCES A. American Institute of Steel Construction, Inc. (AISC): 1. Manual of Steel Construction Allowable Stress Design. B. American Society of Civil Engineers: 1. Guidelines of Engineering Practice for Braced and Tied -Back Excavations. C. California Code of Regulations (CCR): 1. Title 8 - Construction Safety Orders. (CAL/OSHA) D. California Labor Code Sections 6705 to 6707 (CLC). E. Department of the Navy Naval Facilities Engineering Command (NAVFAC): 1. NAVFAC Design Manual 7.2 - Foundations and Earth Structures. 2. NAVFAC Design Manual 7.3 - Soil Dynamics Deep Stabilization and Special Geotechnical Construction. F. International Conference of Building Officials (ICBO): 1. California Building Code (CBC). G. State of California Department of Transportation (CALTRANS): 1. CALTRANS California Trenching and Shoring Manual. H. United States Steel Corporation (USS): 1. USS Steel Sheet Piling Design Manual. 1.03 DEFINITIONS A. General Engineering Design Practice: General engineering design practice in area of the Project, performed in accordance with recent engineering literature on subject of shoring and stability of excavations. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 1 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 1 1 1 1 1 1 1 I 1 1 1 1 B. Shoring: A temporary structural system designed to support vertical faces, or nearly vertical faces, of soil or rock for purposes of excavation. Shoring includes internally braced sheet piling, slurry walls, soldier piles and lagging, and other similar shoring systems. Sloping of the soil is not shoring. 1.04 CONTRACTOR'S RESPONSIBILITIES A. Contractor assumes full and complete responsibility for excavation support and protection, including shoring design and installation. B. The review of Contractor's shoring system design, submittals and/or installations by the Engineer does not relieve Contractor of his responsibility for excavation safety. This requirement shall apply continuously and is not limited to normal working hours. C. Contractor's reliance upon documents furnished by the City does not provide relief from these requirements. 1.05 SYSTEM DESCRIPTION A. Provide drawings and signed calculations and have design performed by a civil or structural engineer registered in California. 1. Provide design calculations that clearly disclose assumptions made, criteria followed, and stress values used for the materials being used. 2. Furnish references acceptable to Engineer substantiating appropriateness of design assumptions, criteria, and stress values. B. Design Requirements: 1. General: a. Design means for safe and stable excavations in accordance with general engineering design practice. 1) The preceding requirement shall not apply to trench excavation support conforming to standards set forth in CCR Title 8 - Construction Safety Orders. b. Design steel members in accordance with the California Building Code and the AISC Manual of Steel Design. c. Design shoring involving materials other than steel in accordance with California Building Code. d. Perform design in accordance with soil characteristics and design recommendations contained in the Project Geotechnical Report issued by the City, titled "Geotechnical Investigation: San Mateo Outboard Levees; Removal of 100 -year Tidal Flood Plain; San Mateo, California." (Lowney Associates, August 28, 2003) e. Design shoring and sheeting systems to resist additional lateral loads including loads induced by high groundwater or tides (with a dry excavation), construction equipment, and material stockpiles near the top of excavation. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 2 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 1 1 1 t 1 1 1 1 f. When electing to design with material stresses for temporary construction higher than allowable stresses prescribed in the Manual of Steel Construction and the California Building Code, increase in such stresses shall not exceed 10 percent of value of prescribed stresses. g. Minimum safety factor used for design shall not be less than 1.5. h. The calculated minimum depth of penetration of shoring below the bottom of the excavation shall be increased not less than 30 percent if the full value of passive pressure is used in the design. i. The location of the point of fixity for shoring shall not be less than half the calculated minimum embedment depth below the bottom of the excavation. 1 Generally acceptable references for the design of shoring and excavations are as follows: 1) CALTRANS California Trenching and Shoring Manual. 2) NAVFAC Design Manual 7.2 Foundations and Earth Design. 3) NAVFAC Design Manual 7.3 - Soil Dynamics Deep Stabilization and Special Geotechnical Construction. 4) USS Steel Sheet Piling Design Manual. 5) Guidelines of Engineering Practice for Braced and Tied -Back Excavations published by American Society of Civil Engineers. k. Shoring design shall be performed by a Civil or Structural Engineer licensed to practice in California. Include costs for this shoring design in the bid. 2. Soldier Piles and Lagging: a. Soldier pile and lagging systems shall not be used. 3. Soil Anchors, Rock Anchors, and Deadmen Anchors: a. Design tie back anchors for a safety factor of not less than 2 times the calculated load from the shoring. b. Proof -load all production anchors to not less than 125 percent of the calculated load from the shoring. Lock off anchors at the calculated anchor load. c. The length of soil anchors used to calculate resistance to load from the shoring, shall not include any length within the potential active pressure soil failure zone behind the face of shoring. d. Apply load from anchors concentrically to wales and other shoring members. e. Design tie rods for anchors for 130 percent of the calculated load from the shoring. f. Design tie rods for anchors for 150 percent of the calculated load from the shoring when tie rod couplers are used and for other conditions where stress concentrations can develop. Soil anchors shall not encroach into private property. g CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 3 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 1 1 1 1 11 1 C. Performance Requirements: 1. General: a. Support faces of excavations and protect structures and improvements in vicinity of excavations from damage and loss of function due to settlement or movement of soils, alterations in ground water level caused by such excavations, vibration associated with installation and removal of excavation support structures, and related operations. b. Herein Specified Provisions: 1) Complement, but do not substitute or diminish, obligations of Contractor for the furnishing of a safe place of work pursuant to provisions of the Occupational Safety and Health Act of 1970 and its subsequent amendments and regulations and for protection of the Work, structures, and other improvements. 2) Represent minimum requirement for: a) Number and types of means needed to maintain soil stability. b) Strength of such required means. c) Methods and frequency of maintenance and observation of means used for maintaining soil stability. 2. Provide safe and stable excavations by means of sheeting, shoring, bracing, sloping, and other means and procedures, such as draining and recharging groundwater and routing and disposing of surface runoff, required to maintain the stability of soils and rock. 3. Provide support for trench excavations for protection of workers from hazard of caving ground. 4. Provide Shoring: a. Where, as result of excavation work and analysis performed pursuant to general engineering design practice, as defined in this Section: 1) Excavated face or surrounding soil mass may be subject to slides, caving, or other types of failures. 2) Stability and integrity of structures and other improvements may be compromised by settlement or movement of soils, or changes in soil load on structures and other improvements. b. For trenches 5 feet and deeper. c. For trenches less than 5 feet in depth, when there is a potential for cave-in. d. Where indicated on the Plans. 5. For safe and stable excavations, use appropriate design and procedures for construction and maintenance to minimize settlement of supported ground and to prevent damage to structures and other improvements, including: a. Using stiff support systems. b. Following appropriate construction sequence. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 4 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 c. Preventing soil loss through or under support system. 1) Provide support system that is tight enough to prevent loss of soil and extend deep enough to prevent heave or flow of soils from supported soil mass into the excavation. d. Providing surface runoff routing and discharge away from excavations. e. Where dewatering is necessary, recharge groundwater as necessary to prevent settlement in area surrounding excavation. f. Where sheet piling is used, use interlocking type sheets including interlocking corners. The sheet piles shall be continuous and driven in interlock. If the bottom of the excavation is located below the water table, use "thumb and finger" type interlock. Not applying shoring loads to existing structures and other improvements. h. Not changing existing soil loading on existing structures and other improvements. i. Provide welded steel packing between soil retaining members such as sheet piles and wales and similar members when the gap exceeds 1/2 inch before the wales are loaded. 6. Do not use cantilever sheet pile shoring. When sheet piling is used, provide a braced system with a minimum of 2 levels of wales and braces. Locate top level of wales and bracing within 5 feet of the top of the sheets. 7. Use template for driving sheet piles to minimize need for pulling and redriving sheet piles in the attempt to drive them plumb in areas where bay mud is present. g. 1.06 SUBMITTALS A. Shop Drawings and Calculations: 1. In accordance with requirements in California Labor Code for trench excavations 5 feet or more in depth and for trenches less than 5 feet in . depth when there is potential for cave-in. Submit in advance of excavation work, detailed drawings showing means for safe and stable excavations. a. Where such drawings vary from excavation support standards set forth in California Code of Regulations Title 8 - Construction Safety Orders, submit design calculations pursuant to general engineering design practice. b. Provide means for safe and stable excavations that are not less effective than required in CCR Title 8 - Construction Safety Orders. 2. For excavations other than trenches, submit, in advance of excavation work, design calculations as performed pursuant to general engineering design practice, as specified in this Section, and detail drawing showing means for safe and stable excavations. In design calculations and detail drawing, cover, as a minimum: a. Excavations adjacent to structures and other improvements, and. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 5 1 1 1 1 1 1 1 1 1 1 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 b. Excavations 5 feet or more in depth, or less than 5 feet in depth when there is potential for cave-in, at other locations. 3. Submit Following: a. Provide calculations for the different load, support, and other conditions that occur during the sequence of installation of shoring, construction of facilities protected by the shoring, and sequence of removal of shoring. b. Provide sketches showing the condition at various stages of installation and removal of shoring. c. Show structures, pipelines, and other improvements located near the shoring, and the shoring on a plan. d. When utilities penetrate the shoring, submit an elevation of all sides of the shoring showing the locations of the penetrations. Submit details on ground support and sealing around utility penetrations. B. Detailed dewatering plan showing all proposed facilities to protect excavations from groundwater intrusion, methods of discharge, and provisions for complying with the Storm Water Pollution Prevention Plan and regulatory permits. C. Control Points and Schedule of Measurements: 1. Submit location and details of control points and method and schedule of measurements in accordance with requirements of this Section. 2. Promptly upon constructing control points and making measurements at such control points, as specified in this Section, submit copy of field notes with such measurements. The field notes shall show the current measurement and the change in measurement from the first measurement taken. D. Vibration Monitoring and Schedule of Measurements: 1. Submit location and details of vibration monitoring points and method and schedule of measurements in accordance with requirements of this Section. 2. Promptly upon constructing vibration monitoring points and making measurements at such points, as specified in this Section, submit copy of field notes with such measurements. The field notes shall show the current measurement and the change in measurement from the first measurement taken. E. Detailed Sequence of Installation and Removal of Shoring: 1. Consider effects of ground settlement in the sequence of installation and removal of shoring. 2. Provide sketches showing the conditions at various stages in the sequence of installation and removal of shoring. 3. Clay and silt may stick to sheet piles when sheet piles are removed. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 6 1 1 1 1 1 1 1 1 1 1 1 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 F. Submit submittals for stability of excavations as a complete package and include all items required in this section. Incomplete submittals will not be reviewed and will be returned for resubmittal as a complete package. Complete submittal shall include all necessary information regarding the dewatering system as specified in Section 02300. 1.07 SEQUENCING AND SCHEDULING A. Do not begin work on excavations, trenches, and means for providing stability of excavation and trenches until submittals have been accepted by Engineer and until materials necessary for installation are on site. B. Submit submittals a minimum of 30 days prior to the scheduled date to begin excavation work. C. Do not begin construction of any shoring or excavation operations until: 1. Control points as specified in this Section and as indicated on the Plans on existing structures and other improvements have been established and surveyed to document initial elevations and locations. PART 2 PRODUCTS Not Used. PART 3 EXECUTION 3.01 INSTALLATION AND REMOVAL A. Install means for providing safe and stable excavations as indicated in the submittals. B. Pile driving equipment (e.g. hydraulic press systems) shall be used that minimize ground vibrations during installation and removal. C. Except for sheet piling cutoff walls, and similar shoring systems that will remain as part of the Project work, remove shoring by completion of the Work. Select shoring system and method of removal, which will minimize soil that sticks to shoring from creating large voids and causing settlement. To prevent settlement caused by pulling shoring, fill voids with sand, pea gravel, or pressure injected grout. The methods used shall prevent settlement. 3.02 CONTROL OF WATER A. Contractor shall control site water so that work may be done in the dry in a safe working environment according to relevant provisions of the Safety Orders. B. Project elevations range from approximately -1 feet to +12 feet mean sea level (96 feet to 109.5 feet on the project datum). Depending upon the daily tide, water will be present at all times. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 7 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 C. Contractor shall perform all work necessary to remove nuisance water from whatever source (Bay tides, groundwater, or surface runoff) that interferes with the progress of the Work. Also included are all equipment and construction necessary for dewatering including pumps, pipe, valves, and suction and discharge appurtenances. 1 1 1 1 1 1 1 1 1 1 1 1 D. Dewatering shall be in accordance with the provisions of Section 7-8.6.4 of the Standard Specifications, except as modified herein. E. Interlocking sheeting shall be used as necessary for excavation support, and to minimize groundwater and tidal flow into the excavations. The Contractor shall dewater all excavations using sump pumps or point wells as necessary, so as to accomplish all work in the dry. 1. Pumped groundwater shall be filtered through crushed rock installed over the excavation bottom or otherwise filtered to produce a clean, non -turbid discharge. For many portions of the Work, permanent crushed rock will not be acceptable at the bottom of the excavations (it would allow seepage). Crushed rock installed for temporary dewatering systems shall be removed at the direction of the Engineer. 2. Contractor shall submit a dewatering plan and receive written authorization prior to executing any dewatering activities. 3. Contractor shall obtain a waste discharge permit from the Regional Water Quality Control Board as necessary for the discharge of non -storm water. Perform water quality testing of discharge as required by the permit conditions. 4. Groundwater with measured turbidity above permit thresholds shall be routed through a Baker tank or other clarifying device located prior to discharge in conformance with these specifications for loading restrictions near cut and fill slopes. G. Excavated areas shall be kept free from water while structures are constructed, while concrete is setting and until backfill has been placed to a sufficient height to anchor the work against possible floatation. 1. Contractor shall prevent the floatation or movement of structures during construction. 2. Provide sufficient pumping capacity to maintain the groundwater level at least two feet below the lowest level of excavation or backfill at all times. 3. Sufficient pumping equipment for immediate use shall be on the project site at all times, including standby pumps for use in case other pumps become inoperable. Water shall be disposed of so as to cause no injury to public or private property, or to be a menace to the public health. H. The Contractor shall be responsible for any damage to foundations or other parts of existing structures or of the new work, caused by the failure of any part of the Contractor's protective works. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 8 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 11 1 1 1 1 1 I. After dewatering is no longer necessary, all dewatering pumps and appurtenances shall be removed by the Contractor. 3.03 TEMPORARY FLOOD PROTECTION A. Provide temporary protection against encroachment from San Francisco Bay tidal water in conformance with Section 01600-3.07 of these Specifications. B. Temporary shoring systems that also protect excavations shall be designed as specified herein and as shown on the drawings to resist the loads imposed by high tide elevations in addition to retained earth. C. Temporary flood protection measures shall remain in place until the reconstructed levee(s) afford(s) full protection as directed by the Engineer. 3.04 MAINTENANCE A. Where loss of soil occurs, plug gap in shoring and replace lost soil with compacted fill material acceptable to Engineer. B. Where measurements and observations indicate possibility of failure or excessive movement of excavation support, determined in accordance with general engineering design practice, Contractor shall take appropriate action immediately. 3.05 CONTROL POINTS A. Establish control points on shoring and on structures and other improvements in vicinity of excavation for measurement of horizontal and vertical movement. 1. Set Control Points On Shoring Support System: a. Set points at distances not exceeding 25 feet at each support level. b. Support levels shall be levels of tie -backs, wales, bottom of excavation, and other types of supports. 2. Set control points in corners of existing structures and on curbs, manholes, and other improvements as required. B. Provide plumb bobs with horizontal targets indicating original position of plumb bobs in relation to shoring at control points located on shoring. C. Perform horizontal and vertical survey and measurement of control points at least once every week. 3.06 VIBRATION MONITORING A. Establish vibration monitoring points on structures and other improvements in vicinity of excavation for measurement of vibration velocities. 1. Set points at corners and along sides of existing structures and other improvements as required. Points along sides shall be set at distances not exceeding 25 feet. CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 9 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 1 EXCAVATION SUPPORT AND PROTECTION SECTION 02260 B. Perform vibration monitoring at least once every two hours during installation and during removal of shoring. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02260 Page 10 1 1 1 1 1 I 1 1 1 1 1 SECTION 02279 CONCRETE BLOCK REVETMENT PART 1 GENERAL 1.01 SUMMARY A. The work covered by this section consists of furnishing all plant, labor, equipment, and materials and performing all operations in connection with the installation of articulated cellular concrete interlocking blocks in accordance with the lines, grades, design, and dimensions shown on the Plans and as specified herein. B. Related Sections: 1. Section 02200 - 2. Section 02300 - 3. Section 02622 - 4. Section 02955 - 1.02 REFERENCES Site Preparation. Earthwork. Filter Fabric and Geotextiles. Planting. A. American Society of Testing and Materials (ASTM): 1. C 33 - Concrete Aggregates. 2. C 42 - Obtaining and Testing Drilled Cores and Sawed Beams Of Concrete. 3. C 140 - Sampling and Testing Concrete Masonry Units. 4. D 698 - Moisture Density Relationship of Soils. B. U.S. Federal Highway Administration (FHWA) and U.S. Bureau of Reclamation (USBR) 1. FHWA-RD-89-199 - Hydraulic Stability of Articulated Concrete Block Revetment Systems During Overtopping Flow. 1.03 SUBMITTALS A. Shop Drawings. At least 30 days prior to the start of any installation of the articulated cellular concrete interlocking blocks, the Contractor shall submit to the City shop drawings for the layout and details of the interlocking concrete blocks. The articulated cellular concrete interlocking block layout shall be to the lines and grades shown on the Plans. The shop drawings shall include layout, layout sequence, anchor details, and details for grade change. B. Representative Samples. The sources, from which the Contractor proposes to obtain materials, shall be selected well in advance of the time when the materials will be required in the work. Suitable samples of the articulated cellular concrete blocks and filter fabric shall be submitted to the City prior to delivery of any such material to the site of the work. Unless otherwise specified, all samples CITY OF SAN MATEO Bayfront Levee Improvements Section 02279 Page 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CONCRETE BLOCK REVETMENT SECTION 02279 shall be obtained by the Contractor and delivered at his expense to a point designated by the City at least ten (10) days in advance of the time when the placing of the concrete blocks is expected to begin. C. Documentation of Testing. The contractor shall provide to the owner test results documenting that the revetment system has been tested under controlled flow conditions for hydraulic performance characteristics in accordance with FHWA-RD-89-199, utilizing a 2:1 slope in the direction of flow. 1.04 DELIVERY, STORAGE, AND HANDLING A. Delivery and Storage: Materials delivered to the site shall be inspected for damage, unloaded and stored with the minimum of handling. Materials shall be kept free of dirt and debris. B. Handling: Materials shall be handled in such a manner as to ensure delivery to the site in sound, undamaged condition per the manufacturer's instructions. Synthetic geotextiles that are not to be installed immediately shall be protected from the direct sunlight and in accordance with manufacturer's recommendations. PART 2 PRODUCTS 2.01 ARTICULATED CELLULAR CONCRETE BLOCKS A. Cellular concrete blocks shall be ShoreBlock® BD Series (Supplied by Shoretec, LLC or an approved equal. Articulated cellular concrete blocks shall be a flexible, interlocking matrix of concrete blocks of uniform size and weight connected by a series of bi-directional corrosion -resistant synthetic cables, installed over a geotextile as shown on the Plans. B. Test results shall be provided documenting that the manufacturer has tested its revetment system under controlled flow conditions for hydraulic performance characteristics in accordance with FHWA-RD89-199, utilizing a 2:1 slope in the direction of flow. C. The manufacturer shall provide certification that the revetment system's design and components meet all of the requirements of this specification. D. The City reserves the right to accept or reject any proposed equal cellular concrete block system for any reason, including but not limited to, previous performance record, appropriate and applicable testing, hydraulic performance characteristics and qualified technical support. 2.02 CONCRETE A. Concrete for block manufacture shall conform to ACI requirements for normal weight concrete and shall have a minimum compressive strength of 4,000 psi at twenty (28) days. CITY OF SAN MATEO Bayfront Levee Improvements Section 02279 Page 2 1 1 1 1 1 1 1 1 1 1 1 1 1 CONCRETE BLOCK REVETMENT SECTION 02279 B. Aggregate shall meet the requirements of ASTM C 33. Aggregate grading shall be reasonably consistent and shall be well graded from the maximum size, which can be conveniently handled with available equipment. 2.03 CELLULAR CONCRETE BLOCKS A. Concrete blocks shall be wet cast using concrete as specified herein, or formed by a vibratory block -forming machine. Cellular concrete blocks shall be interlocking and penetrations shall be included for revetment cables as necessary to bind the individual blocks into a mattress in both the longitudinal and transverse directions. 1. Cables shall not pass through open areas within the dimensions of individual blocks. 2. The blocks shall be open cell and capable of articulation when formed into mattresses. B. Design Requirements. The weight, roughness and permeability of the concrete block shall withstand submergence in a marine environment. 1. The net unit weight of the block shall not exceed 135 pounds per cubic feet. C. The assembled block system shall have approximately twenty (20) percent open area to be achieved by penetrations within the block. D. The cellular concrete blocks, cables and fittings shall be fabricated at the manufacturer's plant into mattresses with a width of up to 8 feet and a length that is capable of being transported without special permitting. 2.04 REVETMENT CABLE A. The concrete blocks shall be bound into mats by the use of polyester revetment cable and fittings placed in both the longitudinal and transverse directions. Individual blocks shall be interconnected in two (2) perpendicular directions. B. Polyester revetment cable shall be constructed of high tenacity, low elongating, and continuous filament fibers. The cable shall consist of a core construction comprised of parallel fibers contained within an outer jacket or cover. 1. The weight of the parallel core shall be 65 to 70 percent of the total weight of cable. 2. Longitudinal cables shall be sized to provide minimum cable strength to mat weight ratio of 5:1 for safe lifting and handling. 3. Longitudinal and transverse cables shall be 1/4 inch minimum in diameter with an approximate minimum average tensile strength of 3,700 pounds. C. Revetment cable shall exhibit resistance to most concentrated acids, alkalis and solvents, be impervious to rot, mildew and degradation associated with marine organisms, and be unaffected by continuous immersion in fresh or salt water. CITY OF SAN MATEO Bayfront Levee Improvements Section 02279 Page 3 1 1 I 1 1 1 1 1 1 CONCRETE BLOCK REVETMENT SECTION 02279 2.05 ANCHORS A. Cellular concrete mattresses shall be anchored at the top and the exposed sides of the ends of the revetment system by fastening the exposed revetment cables to the anchors driven into the anchor trench as shown on the manufacturer's installation drawings. B. Anchors shall have a minimum pull resistance of 2,000 pounds and shall be attached to the revetment system in a manner that will achieve little or no slack in the revetment cable. C. Anchors shall be of the helical or flexible type and shall be installed per the manufacturer's instructions. D. Anchors shall be cast aluminum. 2.06 STRUCTURAL GROUT A. Structural grout shall be required where gaps in the concrete mats occur. Any surface where the clear span between blocks is 3 inches or greater shall be grouted. B. Grouting shall be with normal weight concrete conforming to ACI requirements, and shall have a minimum compressive strength of 4,000 psi at twenty-eight (28) days. 2.07 FILTER FABRIC A. Filter fabric for the cellular concrete blocks shall be installed in accordance with the manufacturer's recommendations, and shall be sized appropriately for the soil conditions present. B. Filter fabric shall conform to Specification Section 02622. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: Examine conditions upon which the work specified in this Section depends for defects that may influence installation and performance. B. Review subgrade to verify that it is properly prepared for the placement of filter fabric and cellular concrete blocks. C. Do not proceed with installation until unsatisfactory conditions have been corrected. CITY OF SAN MATEO Bayfront Levee Improvements Section 02279 Page 4 1 1 1 1 1 1 1 1 1 1 CONCRETE BLOCK REVETMENT SECTION 02279 3.02 SUBGRADE PREPARATION A. Areas on which filter fabric and cellular concrete blocks are to be placed shall be constructed to the lines and grades shown on the Plans. Subgrade for cellular concrete blocks shall be free of voids, pits, or depressions. Voids, pits or depressions shall be brought to grade by backfiling in accordance with the applicable sections of these specifications. B. All obstructions, such as roots and projecting stones larger than one (1) inch remaining on the surface, shall be removed and all of the soft or low density pockets of material removed must be filled with selected material and compacted in accordance with the applicable sections of these specifications. C. Immediately prior to placing the filter fabric and cellular concrete blocks, the prepared area shall be inspected by the Engineer before any fabric or mattresses are placed thereon. 3.03 INSTALLATION OF CELLULAR CONCRETE BLOCKS. A. Excavate anchor trenches, side trenches, and toe trenches as shown on the installation drawings. B. Cellular concrete blocks shall be placed within the limits shown on the Plans. The cellular concrete blocks shall be placed on the filterfabric in such a manner as to produce a relatively planar surface. Any fabric installed more than two (2) days without the placement of concrete blocks shall be lifted and the surface of the slope inspected for any slope defects. The City may require any uncovered fabric to be lifted after heavy rainfall to inspect for slope damage. C. Filter fabric shall be installed in accordance with the manufacturer's recommendations, and as specified herein. Adjacent layers of filter fabric shall have a minimum of three feet of overlap. Fabric shall be secured with 6"x 1 "steel pins prior to placement of cellular concrete mattresses. D. Placement of prefabricated mattresses shall be done with mats attached to a spreader bar or other approved device to aid in the lifting and placing of the mats in their proper position. 1. Separate mats shall be placed so as to abut one another. 2. The maximum allowable space or gap between mats is 3 inches. Gaps larger than 3 inches shall be grouted. No gap may exceed 3 feet. 3. Overlapping of mats will not be accepted and no blocks shall project vertically more than 1 inch beyond the adjacent blocks. E. Mat and individual block placement shall be in accordance with the manufacturer's recommendations and approved shop drawings. 1. As adjacent mats and blocks are placed, they shall be secured to each other by fastening the protruding horizontal and vertical cable connections and end cable loops together along each side of the mats. 2. Cable fastening shall be done with approved sleeves. CITY OF SAN MATEO Bayfront Levee Improvements Section 02279 Page 5 1 1 1 1 I 1 1 1 1 1 1 1 CONCRETE BLOCK REVETMENT SECTION 02279 3.04 FINISHING A. The voids of the cellular concrete blocks, for the limits shown on the Plans, shall be filled with topsoil. The soil should then be seeded in accordance with Specification Section 02955. 3.05 CONTRACTOR QUALITY CONTROL A. The Contractor shall inspect for compliance with contract requirements and record the inspection of all operations including, but not limited to the following, as applicable: 1. Preparation of surface to receive cellular concrete blocks. 2. Individual concrete blocks and filter fabric for soundness and freedom of defect. 3. Assembly of cellular concrete blocks and mats. 4. Placement of blocks and filter fabric on the prepared subgrade. B. Contractor is responsible for replacing damaged blocks at his own expense. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02279 Page 6 1 1 1 1 1 1 1 t I 1 SECTION 02300 EARTHWORK PART 1 GENERAL 1.01 SUMMARY A. The general extent of all excavation, fill and grading is shown on the Plans. B. Section Includes: 1. Removal of excess and unsuitable material from the site. 2. Excavation of material to allow for the placement of underground structures, including any necessary shoring and bracing. 3. Backfilling of underground conduit, pipe, and structures. 4. Preparation of subgrade for concrete slab work and pavement. 5. Furnish and compact artificial fill. 6. Finish grading. C. Related Sections: 1. Section 01047 2. Section 01120 3. Section 01600 4. Section 02200 5. Section 02260 6. Section 02318 7. Section 02622 8. Section 02722 9. Section 03300 1.02 REFERENCES - Utility Coordination. - Hazardous Materials Conditions and Procedures. - Environmental Protection. - Site Preparation. - Excavation Support and Protection. - Trenching. - Filter Fabric and Geotextiles. - Aggregate Base Course. - Cast -In -Place Concrete. A. Associated General Contractors (AGC): 1. Manual of Accident Prevention in Construction (Section 9). B. American Society for Testing and Materials (ASTM): 1. C 131 - Test Method for Resistance to Degradation of Small -Size Course Aggregate by Abrasion and Impact in the Los Angeles Machine. 2. C 136 - Test Method for Sieve Analysis of Fine and Course Aggregates. 3. D 422 - Standard Test Method for Particle - Size Analysis of Soils. 4. D 1556 - Test Method for Density and Unit Weight of Soil in Place by the Sand Cone Method. 5. D 1557 - Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-mim). CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 1 I 1 1 1 1 1 1. 1 1 1 1 EARTHWORK SECTION 02300 6. D 2419 - Test Method for Sand Equivalent Value of Soils and Fine Aggregate. 7. D 2922 - Test Methods for Density of Soil and Soil -Aggregate in Place by Nuclear Methods (Shallow Depth). 8. D 3017 - Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth). 9. D 4318 - Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils. C. Division of Industrial Safety (DIS). D. Institute of Makers of Explosives (IOMOE). E. Occupational Safety and Health Act (OSHA). F. State of California Department of Transportation (Caltrans). 1.03 DEFINITIONS A. Excavation: Consists of satisfactory loosening, removing, loading, transporting, depositing, and compacting in final location, wet and dry materials, necessary to be removed for purposes of construction, or as required for ditches, grading, roads, and such other purposes as are indicated on the Plans. B. Structural Backfill: Backfill around the exterior surfaces of a structure from the bottom of the excavation to finish grade. C. In -Place Density of Compacted Backfill: Is density determined in accordance with ASTM D 1556, or with ASTM D 2922 and ASTM D 3017. D. Maximum Density: Is maximum density obtained in laboratory when tested in accordance with ASTM D 1557 and ASTM D4253 for levee toe drain aggregate. E. Definitions Related to Compaction of Coarse Fill. 1. One Pass: Defined as one movement of roller over area being compacted. 2. Measurement Of Pass Width: Measure width of pass between centers of outside tires or outside edge of roller wheel. F. Optimum Moisture Content: Is the optimum content at the maximum density when tested in accordance with ASTM D 1557. 1.04 SYSTEM DESCRIPTION A. Performance Requirements: 1. General: a. Obtain acceptable material from other sources if surplus or borrow materials obtained within project site do not conform to specified requirements or are not sufficient in quantity for structural backfill. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 2 1 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 b. No extra compensation will be made for hauling fill materials or for water required to compact fills. 2. Subgrade Preparation: a. Exposed surface soils in excavations to receive fill shall be scarified to a depth of six inches, moisture conditioned, and compacted in accordance with this specification section. b. Excavate soft, wet, or otherwise unsuitable base grade to firm, unyielding soil as directed by the Engineer. Subgrade stabilization methods are limited to aerating and drying or removal and replacement. c. These requirements may not be practical where subgrade consists of Bay Mud or shallow fill depths over Bay Mud. These areas may require the use of low ground pressure dozers to prepare the subgrade for fill placement. 3. Description of Fill Types: a. General Fill as specified herein may be used for temporary fills and embankments that are not to be a part of the constructed works. b. Engineered Fill as specified herein shall be used as structural backfill and in embankment construction as shown on the Plans or as directed by the Engineer. 1) Engineered Fill shall be used to reconstruct levee fill below subgrade as directed by the Engineer to replace rubble and unsuitable material excavated at the East End Levee and Seal Slough sites. c. Engineered Levee Fill as specified herein shall be used as structural backfill and foundation material as shown on the Plans or as directed by the Engineer. Engineered Levee Fill is Engineered Fill that meets additional specifications for permeability where seepage control using earthen material is required. d. Lightweight Engineered Fill as specified herein shall be used for embankment construction and structural backfill as shown on the Plans or as directed by the Engineer. Lightweight Engineered Fill shall meet the requirements for maximum unit weight described herein. B. Sources of Fill Materials: 1. Fill material may be surplus material from excavation for structures or other construction for embankments or, if accepted by the City; borrow material excavated from source within Project site may be used for embankments. 2. Whatever source is used, provide fill material conforming to specified requirements for each type of fill. 3. Imported Fill: a. Obtain acceptable material from other sources if surplus or borrow materials obtained within Project site do not conform to specified requirements or are not sufficient in quantity for construction of embankments and other fills. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 3 1 i 1 1 1 1 1 1 1 1 1 i 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 b. Where borrow material is required, provide such material from source selected by the Contractor, subject to acceptance by the Engineer, but not necessarily from within project site. c. Use of imported borrow shall not cause additional cost to the Contract. C. Environmental Requirements: 1. Keep excavations reasonably free from water. 2. Provide standby power to ensure continuous dewatering in case of power failure. 3. While hazardous materials are not expected to be encountered within the site soils or groundwater, remnant petroleum hydrocarbons or other hazardous substances may be discovered during the prosecution of the Work. Contractor shall follow procedures outlined in Section 01120 should any suspected hazardous materials be encountered. 1.05 SUBMITTALS A. Stockpile Management Plan: Submit a stock pile plan demonstrating that Contractor's proposed maximum stockpile heights and limits will not cause settlement or ground movement at adjacent properties. Submit copies of private property owners' agreements to allow placement of surplus material on their properties. B. Product Data: Submit material source, gradation, and testing data for all materials, including imported and on -site materials. C. Test Reports: Submit certified test reports of all tests specified to be performed by the Contractor. Test reports shall be signed and sealed by a registered geotechnical engineer in the state of California. 1.06 GEOTECHNICAL REPORTS A. City has prepared geotechnical reports describing site conditions and construction recommendations: 1. "Geotechnical Study: San Mateo Outboard Levees, Removal of 100 -year Tidal Flood Plain; San Mateo, California," by Lowney Associates (August 2003). 2. "Supplemental Geotechnical Exploration: City of San Mateo Bayfront Levee Improvements; Seal Slough Site and East End Levee Site," by ENGEO, October 2009). B. Said documents are available for review at the City. Contact Cathi Zammit at (650) 522-7306. C. Referenced geotechnical reports are for information only and are not part of the Contract Documents. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 4 1 EARTHWORK SECTION 02300 I 1 1 1 1 1 1 1 1 1 PART 2 PRODUCTS 2.01 MATERIALS A. Water for compacting embankments and fill shall be from a source acceptable to Engineer. B. No embankment or fill material shall be placed or compacted before all submittals relating to that material have been designated as "accepted" by the City. 1. A sample of all proposed fill materials shall be submitted for compliance testing at least four weeks prior to the proposed date of import. Consideration will also be given to the environmental characteristics of imported soils per Paragraph 2.02. 2. Proposed fill materials shall be approved by the Engineer at least five working days prior to site delivery. Compliance testing for aggregate base may require up to ten days. C. Embankment and fill materials shall meet the following requirements depending upon the type of embankment or fill construction shown on the Plans (allowable fill materials for each type of construction are summarized in the table below), as specified herein, or as directed by the Engineer. General Fill Engineered Backfill Engineered Levee Fill Lightweight Engineered Fill General Fill Engineered Backfill Engineered Levee Fill Lightweight Engineered Fill Engineered Backfill Engineered Levee Fill Engineered Levee Fill Lightweight Engineered Fill 1. General Fill: a. Provide material having maximum particle size not exceeding 1 inch and that is free of trash, lumber, debris, leaves, grass, roots, stumps, and other vegetable matter. b. Fill materials provided shall be free of environmental contaminates. c. Materials derived from processing demolished or removed asphalt concrete are not acceptable. 2. Engineered Backfill a. Engineered Backfill as called for on the Plans shall be imported backfill meeting these requirements or suitable onsite material from excavation blended with imported fill material as necessary to meet these requirements. b. The fill material shall consist of lean clay, sandy clay, silty clay or clayey silt with minimum undrained shear strength of 800 psf and/or a minimum effective friction angle of 34 degrees, and a maximum total unit weight of 125 pounds per cubic foot when compacted to the specifications below. c. The fill material shall consist of clean soils with an organic content of 3 percent or less. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 5 1 EARTHWORK SECTION 02300 1 1 1 I 1 1 1 1 d. The fill material shall have a Plasticity Index of 20 or less. e. The fill material shall not contain rock or aggregate larger than 6 inches in greatest dimension, with no more than 15 percent larger than 21/2 inches. 3. Engineered Levee Fill a. Engineered Levee Fill shall meet all requirements for Engineered Backfill. b. In addition, Engineered Levee Fill shall have a vertical hydraulic conductivity less than or equal to 10-° cm/sec when compacted to a relative compaction of 90 percent maximum dry density per ASTM D1557. 4. Lightweight Engineered Fill a. Lightweight Engineered Fill as called for on the Plans shall be imported backfill meeting these requirements or suitable onsite material from levee excavation blended with imported fill material if necessary to meet these requirements. b. Lightweight engineered fill shall be Baypor, available from Port Costa Materials, Port Costa, California; Glass Mountain Pumice, Inc., Reno, Nevada; TXI in Stockton, California; or equal. c. Lightweight engineered fill shall have a maximum dry density of 60 pounds per cubic foot and a maximum compacted in -place dry density of 70 pounds per cubic foot. d. Lightweight aggregate should consist of aggregates prepared by expanding, palletizing, or sintering products such as shale, clay or slate by the rotary kiln process or by processing natural materials such as pumice. No by-product slags, cinders or by-products of coal combustion shall be used. Lightweight aggregate shall be durable and non -corrosive. e. Lightweight aggregate shall be encapsulated in filter fabric to prevent migration of fines. f. Lightweight aggregate shall not be greater than 1 inch in size, and shall have the following gradation: Sieve Size (Square Openings) Percent by Weight Passing Sieve 1 inch 100 3/4 inch 95-100 1/2 inch 90-100 Number 4 30-60 Number 50 5-20 Number 200 2-9 Number 4 0-15 Number 8 0-5 CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 6 1 1 1 1 1 1 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 5. Aggregate Base Course shall be as specified in Section 02722. 6. Pipe Bedding Material shall be Class 2 aggregate base or crushed rock as shown on the Plans. 7. Native Material: a. The use of native materials, including Bay Mud, as a fill material may be acceptable under the conditions listed herein if it is processed to meet specifications. b. The use of native material in the finished work.shall be at the sole discretion of the Engineer. D. Geotextiles and Filter Fabrics: 1. As specified per Section 02622. 2.02 OFFSITE SOIL SUITABILITY A. Contractor shall sample and test soil from on- and off -site sources prior to importing soil to the site for use in levee construction as required to demonstrate compliance with these specifications. Submit soil test results to Engineer for review at least four weeks prior to the import date. B. Engineer may deem soil unsuitable for use as fill. If soil is deemed unsuitable, the Contractor shall identify a different source of soil and the analysis described above shall be repeated. C. Lime -treated soil shall not be imported for use in the constructed works. D. Imported fill material shall not be more corrosive than native material or existing levee fill based on laboratory testing for pH, soluble sulfates, chlorides and resistivity. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: 1. Character and Quantity of Material: a. Verify character and quantity of rock, gravel, sand, silt, water, and other inorganic or organic materials to be encountered in work to be performed. b. Determine gradation and shrinkage of excavation and fill material, and suitability of material for use intended in work to be performed. c. Determine quantity of material, and cost thereof, required for construction of excavations and fills, whether from on -site excavations, borrow areas, or imported materials. Include in cost of work to be performed. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 7 1 1 1 1 I 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 d. Include wasting of excess material, if required, in cost of work to be performed. e. All excavated soils will need to be segregated, cleaned, and/or screened prior to re -use as embankment fill (levee fill). f. Fills used for embankments shall be composed of clean soils free of oversize material, construction debris, organics and contamination and shall meet the specified gradation and quality requirements for specialized fill. The Contractor shall, prior to submitting his bid, visit the site and become familiar with actual site and soil conditions. No allowance will be made by the City for any unfavorable conditions or events which should have been foreseen from a thorough examination of the contract documents, the geotechnical reports, the site, and working conditions. g. B. Verification of Prepared Subgrade prior to Constructing Improvements: 1. The Contractor shall request the Engineer to visually inspect and provide written confirmation of the suitability of prepared subgrade soils prior to the continuation of work. a. Work completed without such confirmation is at the Contractor's risk and subject to removal at the direction of the Engineer. b. The Engineer will perform this inspection no later than two working days after the Contractor makes his request. Contractor shall protect excavation prior to and during the inspection. a. The Contractor remains solely responsible for excavation safety. This responsibility is not waived when the Engineer agrees to enter the work site for inspection. 3.02 PROTECTION A. If existing live utilities are encountered, they are to be protected from damage and the proper authorities and affected utility companies notified. B. Attention is directed to the Plans which indicate the presence of a high voltage underground PG&E electric utility. Service shall not be interrupted except as directed or accepted; allow sufficient time for utility companies to arrange for continuation of services. C. Record unmarked utility locations on record drawings and notify the Engineer. D. Open excavations, trenches, and the like are to be protected with fences, barricades, covers and railings as required. E. Every precaution shall be taken to prevent spillage when hauling on or adjacent to any public street or highway. Any spillage shall be promptly removed. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 8 1 1 1 1 11 1 1 1 1 1 EARTHWORK 3.03 SAFETY SECTION 02300 A. In conformance with Section 02260, the Contractor is solely responsible for excavation safety, including support to all adjacent improvements at all times. B. Excavation or fill placement shall not begin until shoring drawings have been returned by the Engineer in accordance with Section 02260. C. Stockpiles of soil or other materials shall not be placed within 50 feet of a slope. 3.04 LIMITATIONS ON THE USE OF HEAVY EQUIPMENT A. Construction equipment shall be limited to lightweight sizes to reduce the potential for subgrade disturbance, slope instability, and damage to buried utilities. Contractor shall submit a description of all proposed equipment, including gross vehicle weights, prior to bringing any equipment to the site. B. Construction equipment shall maintain slow velocities and compactors should keep vibration off. C. The Contractor should consider lightweight low -ground -pressure equipment for open excavations in soft Bay Mud. Light dozers with mud tracks (equivalent to a Caterpillar D4) may be required. D. Haul routes for trucks and scrapers shall be kept level and smooth to prevent equipment from bouncing and imposing high dynamic loads on subgrades or fill. E. Construction equipment shall not be parked within 50 feet of a slope. 3.05 PREPARATION A. Surface Preparation: 1. Preparing Ground Surfaces for Fill or Concrete Footings: a. After clearing, grubbing and stripping is completed, scarify entire areas which underlie fill sections or structures to a depth of 6 inches and until surface is free of ruts, hummocks, and other features which would prevent uniform compaction by equipment to be used. b. Moisture condition and recompact areas to density specified in "Compacted Fills" before placing of fill material or concrete. c. Where cemented rock, cobbles, or boulders compose a large portion of foundation material underlying structures, slabs, or paved areas, it may not be advisable to scarify the top 6 inches prior to compaction. If the Engineer deems it advisable not to scarify existing natural ground, then moisten the native soil and compact it as specified in "Compaction of Coarse Fill." d. Where subgrade stabilization is required, scarification and compaction of native soils is not practical. In these instances stabilize the subgrade by placing geotextile and crushed rock as shown on the plans and/or specified herein. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 9 1 1 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 e. Finished compacted subgrade shall be firm and non -yielding under the weight of compaction equipment. If the relative compaction of the subgrade is less than specified, or the surface of the subgrade exhibits significant yielding, over -excavate the area and rebuild or rework the area until the subgrade compaction conforms to this specification. 2. Preparing Sloped Surfaces for Fill or Foundations: a. Foundations for Fill Having Slopes in Excess of One Vertical to Four Horizontal: 1) Bench or terrace to adequately key existing ground and fill built thereon. b. Slopes of Old Fills Including Existing Levees: Bench minimum of 4 feet horizontally as fill is placed. c. Provision of New Benches: 1) Start new bench wherever vertical cut of next lower bench intersects existing ground. 2) Recompact material thus cut out along with new embankment material at no additional cost to the Contract. 3. Preparing for Structural Backfill: a. After completion of foundation footings and walls and other construction below the elevation of the final grades and prior to backfilling, all forms shall be removed and excavation shall be cleaned of all trash and debris. b. After inspection of foundation, walls, and pipes, backfill shall be placed symmetrically to prevent eccentric loading upon or against structures. c. To prevent damage to structures, structural backfill shall be placed with equipment which does not exceed H-20 loading, within a distance of 1/2 to 1/3 h (h being the vertical distance from the level being compacted down to the surface on the opposite side of the wall). Outside this distance, normal compaction equipment may be used within the guidelines of these specifications. d. All backfill shall be compacted per this specification. 3.06 APPLICATION A. General: 1. Dispose of excavated materials which are not required or unsuitable for fill and backfill in lawful manner. 2. Dispose of surplus material on private property only when written permission agreement is furnished by owner of property. Submit copies of such agreements. 3. Obtain material required for fills in excess of that produced by excavation from borrow areas subject to the fill material requirements specified herein. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 10 1 1 1 1 1 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 4. Rocks, broken concrete, or other solid materials larger than 4 inches in greatest dimension shall not be placed in fill areas, but removed from project site at no additional cost to the Contract. 5. Stabilization of Subgrade: Provide materials used or perform work to stabilize subgrade so it can withstand loads which may be placed upon it by Contractor's equipment. 6. The upper 24 inches of the subgrade in pavement areas shall be compacted to 95 percent relative compaction. 7. No material larger than 1 inch shall be placed in the first two feet below subgrade. B. Excavation: 1. Excavations for Floodwall Structures: a. All excavations shall comply with Section 02260, Excavation Support and Protection. b. Dimensions and Elevations of Excavations: Provide excavations conforming to dimensions and elevations indicated on the Plans for each structure, including trenching for all work incidental thereto. c. Soil of Unsuitable Bearing Value: Where soil is encountered having unsuitable bearing value in the opinion of the Engineer, the Engineer may direct in writing that excavation be carried to elevations above or below those indicated on the Plans. d. Unless directed by the Engineer, excavations shall not be carried below elevations indicated on the Plans. e. Where excavations are made below elevations indicated on the Plans, adjust elevations of excavations in accordance with requirements following: 1) Under Slabs: Restore to proper elevation in accordance with procedure specified for backfill in this Section. 2) Under Footings: Restore to proper elevation in accordance with procedure specified for backfill in this Section. f. Excavation Width: Excavations shall only be as wide as needed to allow for pouring footings as shown on the Plans. Undercutting of slopes will not be permitted. g. Bottom of Excavations for Structures: Consist of native or fill material as shown on the Plans with the top 6 inches compacted to 95 percent of maximum density and graded to conform to outside limits of structures as indicated on the Plans, except where otherwise indicated on the Plans or specified. h. Difficulty of Excavation: No extra compensation will be made for removal of rock or any other material due to difficulty of excavation. i. Location of Structures on Different Substrates: Where structure will be located partially on fill and partially on undisturbed or natural material, over -excavate entire area to depth of 6 inches below elevations indicated on the Plans and recompact to 95 percent maximum density. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 11 EARTHWORK SECTION 02300 1 1 1 1 1 1 2. Necessary Over Excavation: a. General: 1) Where it becomes necessary to excavate beyond normal lines of excavation in order to remove boulders or other interfering objects, backfill voids remaining after removal as specified in Backfilling of Voids, or as acceptable to the Engineer. 2) Perform necessary excavation beyond normal lines as specified above and backfill such voids. b. Backfilling of Voids: 1) Fill voids with suitable material acceptable to the Engineer, placed in manner and to same uniform density as surrounding material. 2) With acceptance of the Engineer, concrete of same mix as used in concrete channel may be used. 3. Removal of Unsuitable Material at East End Levee: a. The levee structure identified as the East End Levee consists of undocumented fill and a one to two foot thick layer of rubble with large voids located approximately five feet below the top of levee surface in isolated pockets. b. The undocumented fill and rubble layer shall be removed as shown on the Plans and directed in the field by the Engineer. c. This fill may be reused as engineered fill if it meets the requirements of this specification section for general or levee fill, by itself or as blended with imported fill. C. Compaction: 1. Compacted Fills: a. Lines and Grades: 1) Construct fills, embankments, and backfills, designated herein as fills, at locations and to lines and grades indicated on the Plans. b. Where required, Contractor shall provide necessary imported fill material from outside sources. c. Compacted Fill Shape and Sections: Provide completed fill that corresponds to shape of typical sections indicated on the Plans or that meets requirements for particular case. d. Preparation of Areas Designated to Receive Fill Material: Scarify to minimum depth of 10 inches, moisture condition and recompact to density of fill material as specified in the following Article. 1) In areas where Bay Mud is exposed at the subgrade level, shallower scarification should occur to avoid penetrating through the desiccated crust. Contractor shall consult with Engineer. e. Fills and Backfills and Upper 6 Inches in Cuts: Compact to percentage of maximum density as follows and as determined by ASTM D1557: 1) Backfill adjacent to structures: 95 percent. 2) Under present and future structures: 95 percent. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 12 EARTHWORK SECTION 02300 1 1 1 1 I 1 1 1 1 1 1 3) Under roadways and parking areas subject to traffic loading: 95 percent to three feet under subgrade. 4) Under paved areas not subject to traffic loading, curbs, and sidewalks: 90 percent. 5) Other areas: 85 percent. 6) Compacted embankments: 90 percent. 7) Demolition areas: 95 percent. f. Placing Compacted Fills: 1) Placement: Place loose material in successive layers that do not exceed 10 inches in thickness or the depth of penetration of the compaction equipment used, whichever is less. 2) Each successive lift shall be firm and non -yielding under the weight of construction equipment. 3) Vibratory compaction equipment shall not be used. 4) Engineered fill shall be adequately benched into the existing levee fill as specified herein. 5) Defective Compacted Fills: Remove and recompact. g. Compaction Control Requirements: 1) On -site clayey materials such as Bay Mud — a) Required Moisture Content: Not less than 4 percentage points above optimum moisture content as determined by ASTM D 1557. b) Required Relative Compaction: Not less than 90 percent. 2) Native subgrade materials, imported fill material or other fill materials with low expansion potential (PI < 12) — a) Required Moisture Content: Not less than optimum moisture content as determined by ASTM D 1557. b) Required Relative Compaction: Not less than 90 percent. h. The biologist will evaluate topsoil once levee construction is complete for compaction suitability. Planting areas with compaction considerably greater than 90% will be considered unsuitable for re - vegetation. Over -compacted soil shall be disked or ripped to a depth of 8 inches as directed by the biologist and amended or conditioned per Section 02925. 3.07 PLACEMENT OF FILL OVER BAY MUD A. These requirements are specific to the placement of fill within Seal Slough and other locations where Bay Mud is encountered and are in addition to other requirements specified herein. B. Specifications of all equipment and proposed subgrade stabilization methods shall be submitted to the Engineer for review prior to site mobilization. C. Exposed Bay Mud shall be allowed to dry until a hard crust is formed. Alternatively the following procedure may be followed. 1. An initial lift of stable fill shall be placed under the observation of the Engineer. 2. Prior to the first lift placement, all vegetation shall be removed. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 13 1 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1 1 1 EARTHWORK SECTION 02300 3. At the Contractor's option, stabilization fabrics, geogrids, cellular mats, or other geosynthetics may be placed to prevent the loss of equipment into the Bay Mud. 4. After a stable surface has been constructed, the Contractor shall install City -furnished settlement instrumentation as directed by the Engineer. 5. An initial lift of 18 to 24 inches thick will be placed during low tide conditions and compacted using track -walk equipment until a stable thickness is established as directed by the Engineer in the field. D. Once an initial stable filler layer is established, additional fill shall be compacted to a minimum of 90 percent relative compaction using conventional methods. 1. During fill placement, each lift of fill for the entire area shall be relatively level with variations in elevation no greater than one foot. E. Monitoring: The City will monitor settlement at the site and on adjacent properties during construction. The City will advise the Contractor as to the schedule of this monitoring and any adjustments needed to the method of fill placement. 3.08 FIELD QUALITY CONTROL A. Tests: 1. Compliance Tests: a. Contractor shall accomplish specified compaction for backfill, fill, and other earthwork. b. Compliance tests shall be made by the Contractor using a testing laboratory retained by the Contractor to verify that his compaction is meeting requirements specified herein. 1) Testing laboratory is subject to pre -approval by the Engineer. c. Contractor shall coordinate with Engineer regarding the frequency of Compliance Testing and testing results. 1) Compliance Testing will be performed not less than as follows: a) For embankment and structure backfill, no less than 1 test for every 2 feet of vertical fill thickness and no less than 1 test for every 200 cubic yards of fill placed for embankment fill and 100 cubic yards of fill placed for structure backfill. b) For base material, no less than 1 test for every 100 cubic yards of base placed. 2) Copies of Compliance Test Reports shall be submitted promptly to the Engineer. a) Failure to promptly submit compliance test reports at the required frequency shall not relieve the Contractor of his responsibility to meet compaction requirements. 2. Confirmation Tests: a. The City may, at its option, arrange for confirmation testing through its own forces or a testing laboratory. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 14 1 I 1 1 1 1 1 1 EARTHWORK SECTION 02300 b. In the event that compaction results from confirmation testing differ from the Contractor's compliance testing, the Engineer will work with the Contractor's testing laboratory to reconcile the differences. 1) Compaction efforts shall not resume until the differences have been resolved. c. Cost of Confirmation Tests: Paid for by the City. d. Coordination with Engineer during Testing: Remove overburden above level at which the Engineer wishes to test and backfill and recompact excavation after testing is completed. 3. Retesting: If compaction fails to meet specified requirements, perform remedial work by one of the following methods: a. Remove and replace backfill at proper density. b. Bring density to specified level by means acceptable to the Engineer. c. Costs of Retesting: Costs of all retesting (more than two re -tests) required to confirm and verify that remedial work has brought compaction within specified requirements shall be borne by the Contractor. B. Tolerances: 1. Finish Grading of Excavations, Backfill and Fills: a. Perform fine grading under concrete structures such that finished surfaces are never above established grade or approved cross section and are never more than 0.10 feet below. b. Provide finish surface areas outside of structures that are not more than 0.10 feet above or below established grade or accepted cross section. Exceptions may be granted to the placement of fill in Seal Slough based on field conditions and the Engineer's discretion. 2. Of Areas Which Are Not under Structures, Concrete, Asphalt, Roads, Pavements, Walks, Dikes and Similar Type Items: a. Provide finish graded surfaces of either undisturbed natural soil, or cohesive material not less than 6 inches deep. b. Intent of the preceding requirement is to avoid sandy or gravelly areas. 3. Finished Grading Surfaces: a. Reasonably smooth, compacted, and free from irregular surface changes. b. Provide degree of finish that is ordinarily obtainable from blade grader operations, except as otherwise specified. c. Uniformly grade areas which are not under concrete. d. Finish gutters and ditches so that they drain readily. CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 15 EARTHWORK SECTION 02300 1 1 1 1 1 1 1 1 1 1 1 1 3.09 WET WEATHER AND WET SOIL CONDITIONS A. To the maximum extent possible within schedule constraints, major excavation should take place during periods of suitable weather conditions. B. The continuous presence of tidal, lagoon and groundwater at the project sites is noted, the level of which may fluctuate hourly due to tidal influence. The impact of such water on the work sites shall not be considered a reason for excusable delay. C. Bay Mud: The Contractor is hereby informed that fill of variable thickness overlie Bay Mud in most of the work areas. Earthwork construction and excavation close to or into Bay Mud require methods and equipment suitable for soft to very soft soil conditions. D. When the moisture content of fill materials is significantly above optimum: 1. Scarify and air dry until fill materials have a suitable moisture content for compaction; or 2. Over -excavate the fill and replace with suitable on -site or import materials with an appropriate moisture content; and/or 3. Install a geotextile or geogrid to reinforce soft fill. 3.10 ADJUSTING A. Finish Grades of Excavations, Backfilling and Fill: 1. Repair and reestablish grades to required elevations and slopes due to any settlement or washing way that may occur from action of the elements or any other cause prior to final acceptance. B. Finish Grades of Excavations, Backfilling and Fill: 1. Protect newly graded areas from action of the elements. C. Ditches and Gutters: 1. Maintain ditches and gutters excavated free from detrimental quantities of debris that might inhibit drainage until final acceptance. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02300 Page 16 SECTION 02318 TRENCHING PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Trench excavation, fine grading, pipe bedding, backfilling, and compaction for the following: 1. Sewage effluent overflow outfall termination. 2. Storm water pump force main outfall relocation. 3. Irrigation system reconstruction. 1 I 11 1 1 1 B. Related Sections: 1. Section 02260 2. Section 02300 3. Section 02700 4. Section 02622 1.02 REFERENCES A. - Excavation Support and Protection. - Earthwork. - High Density Polyethylene Pipe. - Filter Fabric and Geotextiles. American Society for Testing and Materials (ASTM): 1. C 131 - Test Method for Resistance to Degradation of Small -Size Course Aggregate by Abrasion and Impact in the Los Angeles Machine. 2. C 136 - Test Method for Sieve Analysis of Fine and Course Aggregates. 3. D 1556 - Test Method for Density and Unit Weight of Soil in Place by the Sand Cone Method. 4. D 1557 - Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft.lbf/ft^3 (2,700 kN.m/m^3)). 5. D 2922 - Test Methods for Density of Soil and Soil -Aggregate in Place by Nuclear Methods (Shallow Depth). 6. D 4318 - Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils. 1.03 SUBMITTALS A. Products Data: For all proposed bedding and backfill materials. B. 1. 2. 3. Material source. Gradation. Testing data and testing laboratory qualifications including lab certification. Trench excavation plan, drawings, and calculations as specified in Section 02260. CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 1 TRENCHING SECTION 02318 PART 2 PRODUCTS 2.01 MATERIALS A. General: 1. Provide material having maximum particle size not exceeding 4 inches and that is free of leaves, grass, roots, stumps, and other vegetable matter. 2. Materials derived from processing demolished or removed asphalt concrete are not acceptable. 1 1 1 1 1 1 1 1 1 1 1 B. Crushed Rock: As specified in Section 02300. C. Geotextile Filter Fabric: As specified in Section 02622. D. Bedding: Class 2 Aggregate Base as specified in Section 02722. E. Backfill: Engineered backfill as specified in Section 02300. 2.02 CONTROLLED DENSITY FILL A. Lightweight controlled density fill shall be used for trench bedding and backfill when specified compaction cannot otherwise be met due to field conditions such as conflicting utilities. B. Controlled Density Fill Components: 1. Portland Cement: Type II low alkali portland cement as specified herein. 2. Fly Ash: Class F fly ash conforming to ASTM C 618. 3. Water: As specified in Section 03300. 4. Admixture: Air entraining admixture conforming to ASTM C260. 5. Fine Aggregate: Concrete sand, but need not conform to ASTM C 33. No more than 12 percent of aggregate shall pass a No. 200 sieve, and no plastic fines shall be present. 6. Coarse Aggregate: Lightweight aggregate conforming to 02300-2.01.B.7. C. Mix Design Criteria: Material Weight Specific Gravity Absolute Volume Cubic Foot Cement 30 pounds 3.15 0.15 Fly Ash 300 pounds 2.30 2.09 Water 283 pounds 1.00 4.54 Coarse Aggregate 613 pounds 1.12 8.76 Fine Aggregate 1,465 pounds 2.68 8.76 Admixture 4-6 ounces - 2.70 TOTAL 2,691 pounds - 27.00 CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 2 TRENCHING SECTION 02318 PART 3 EXECUTION 3.01 PREPARATION 1 I 1 1 1 1 1 1 I I 1 1 1 A. General: 1. Trench Condition: a. Install pipe and materials as specified herein and detailed on the Plans. 2. Embankment Condition: a. Exists where width of pipe trench exceeds limits specified herein. b. Before laying pipes or electrical conduits in fill, place fill and compact it to not less than 2 feet above top of pipe or conduit. c. After placing and compacting fill, excavate through fill and fine grade as required in this Section. B. Protection: Stabilize excavation as specified in Section 02260. 3.02 INSTALLATION A. Trench Excavation: 1. General Requirements: a. If because of soil conditions, safety requirements or other reasons, trench width at top of pipe is increased beyond width specified in this Section, upgrade laying conditions or install stronger pipe designed in conformance with Specifications for increased trench width, without additional cost. b. Trench Widths: 1) Minimum Clear Width of Trench for Pipe (Measured at Top of Pipe): a) For pipe sizes 4 inches to and including 24 inches in diameter: Not less than outside diameter of pipe plus 12 inches. b) For pipe sizes larger than 24 inches in diameter: Not less than outside diameter of pipe plus 24 inches. 2) Maximum Clear Width of Trench for Pipe (Measured at Top of Pipe): a) For pipe sizes 4 inches to and including 24 inches in diameter: Not to exceed outside diameter of pipe plus 24 inches. b) For pipe sizes larger than 24 inches in diameter: Not to exceed outside diameter of pipe plus 36 inches. c. For Manholes, Valves, or Other Accessories: 1) Provide excavations sufficient to leave at least 12 inches clear between their outer surfaces and embankment or shoring which may be used to hold banks and protect them. CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 3 TRENCHING SECTION 02318 1 1 1 I 1 1 1 1 1 1 2) Do not backfill with earth under manholes, vaults, tanks, or valves. 3) Fill any unauthorized excess excavation below elevation indicated on the Plans for foundation of any structure with foundation material at no additional cost. Backfill material may be substituted for foundation material in areas where foundation material is not required and when approved by the Engineer. 4) Backfilling of Manhole Excavation: Conform to backfilling requirements as specified for trenches in this Section. d. At Road Crossings or Existing Driveways: 1) Make provision for trench crossings at these points, either by means of backfills, tunnels, or temporary bridges. B. Pipe Foundation: 1. Over excavate bottom of trench to allow installation of geotextile filter fabric, pipe foundation material, and trench fine grading material as specified. Fill over -cut with foundation material as specified. 2. Foundation Material: a. Foundation material shall be as scheduled herein unless otherwise specified and shall be provided at all locations where Bay Mud is encountered or where other unstable soils are present at the bottom of the excavation. b. Minimum thickness shall be 24 inches unless otherwise indicated on the Plans. c. Geotextile filter fabric shall be placed beneath, on the sides, and on top of the foundation material. Minimum overlap of the filter fabric shall be 12 inches. d. Pipe foundation material shall be compacted to 90 percent maximum density at optimum moisture content or above according to ASTM D1557 before placing filter fabric on top of foundation material. C. Pipe Bedding: 1. Bedding material shall be as scheduled herein unless otherwise specified. 2. General: a. Over excavate bottom of trench to allow installation of at least 6 inches, or 1/12 outside diameter of pipe, whichever is greater. b. Place bedding material at uniform density, with minimum possible compaction. 3. Bell or Coupling Holes: a. Dig holes after trench fine grading has been placed. b. Provide holes of sufficient width to provide ample room for grouting, banding, or welding. CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 4 1 1 1 1 1 1 1 1 1 1 1 1 1 TRENCHING SECTION 02318 c. Excavate holes only as necessary in making joints and to ensure that pipe rests upon prepared trench bottom and not supported by any portion of the joint. 4. Depressions for Joints, Other than Bell -and -spigot: a. Make in accordance with recommendations of joint manufacturer for particular joint used. 5. After Pipe Laid: a. Place bedding material under, around, and above pipe to 12 inches above top of pipe in maximum 6 -inch lifts and compact to 90 percent of maximum density. 6. Pipe Displacement: a. Take necessary precautions in placement and compaction of bedding material to prevent displacement of piping. b. In event there is movement or floating, re -excavate, re-lay, and backfill the pipe. 7. Consolidation: a. Bedding shall be mechanically compacted at optimum moisture content or above according to ASTM D1557 with non -vibratory compaction equipment. Water settling methods such as flooding and jetting are prohibited. D. Trench Backfill: 1. Backfill material shall be as scheduled herein unless otherwise specified. 2. Place and compact backfill in accordance with following requirements: a. From 12 inches above top of pipe to natural surface level. Match finish grade as indicated on the Plans. b. Backfill for Trench Cuts in Roadways and Paved Streets: Backfill trench to underside of specified pavement section with backfill material compacted to 90 percent of maximum density. Final backfill material for roadways and paved street sections to be compacted to 95 Percent of maximum density. c. Backfill for Trench Cuts in Areas outside the Improved Section of Roadways and in Open Country: Backfill trench from 12 inches above top of pipe to finish grade with backfill material compacted to 90 percent of maximum density. d. Trench Backfill through Earth Slopes or Embankments Supporting Structures, Through Structural Fill, or Adjacent to and/or Under Structures: Backfill trench from 12 inches above top of pipe to finish grade with backfill material compacted to 95 percent of maximum density. e. Existing Conditions: Where existing underground pipes or conduits larger than 3 inches in diameter cross trenches above new work: CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 5 TRENCHING SECTION 02318 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1) Backfill from bottom of intersecting trench to spring line of intersecting pipe or conduit with backfill material compacted to 90 percent of maximum density when tested in accordance with ASTM D 1556 or ASTM D 2922. a) Provide controlled density fill material as specified herein, below existing pipe or conduit where backfill cannot be placed and compacted as specified. Controlled density fill shall have a minimum thickness of 12 inches beneath the existing pipe or conduit and shall extend up to the springline of the pipe or conduit. Controlled density fill shall extend a minimum of 12 inches beyond the outside of the pipe or conduit in either direction and as a minimum shall extend to the edge of the trench crossing the pipe or conduit. 2) Extend backfill material 2 feet on either side of intersecting pipe or conduit to ensure that material remains in place while other backfill is placed. f. Backfill shall be mechanically compacted at optimum moisture content or above according to ASTM D1557 with non -vibratory equipment weighing no more than 12 tons static weight. All backfill shall be placed in maximum 8 -inch lifts. Water settling methods such as flooding and pooling or jetting are prohibited. E. Select or Native Material: 1. Select or native material shall not be used as backfill unless otherwise approved by the Engineer. F. Excess Material: 1. Remove excess excavated material and any excavated Bay Mud from the project site and dispose of legally off -site. 3:03 FIELD QUALITY CONTROL A. Tests: 1. Confirmation Tests: a. Contractor's Responsibilities: 1) Accomplish specified compaction of trench backfill. 2) Control operations by confirmation tests to verify and confirm that compaction work complies, and is complying at all times, with requirements specified in this Section concerning compaction, control, and testing. 3) Cost of Confirmation Tests: Paid for by the Contractor. 4) Qualifications of Contractor's Testing Laboratory: Provide lab certification. 5) Copies of Confirmation Test Reports: Submit promptly to the Engineer. b. Frequency of Confirmation Testing: 1) Perform testing not less than as follows: a) For Trenches: At each test location include tests for each type or class of backfill from bedding to finish grade. CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 6 TRENCHING SECTION 02318 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 b) In Open Fields: Two every 1,000 linear feet. c) Along Dirt or Gravel Road or off Traveled Right-of-way: Two every 500 linear feet. d) Crossing Paved Roads: Two locations along each crossing. e) Under Pavement Cuts or within 2 Feet of Pavement Edges: One location every 400 linear feet. 2. Compliance Tests: a. Frequency of Testing: Periodic compliance tests will be made by the Engineer to verify that compaction is meeting requirements previously specified. 1) Compliance testing will be paid for by the City under separate contract. b. If Compaction Fails to Meet Specified Requirements: Perform remedial work by one of the following methods: 1) Remove and replace backfill at proper density. 2) Bring density up to specified level by other means acceptable to the Engineer. c. Retesting: 1) Costs of Retesting: Costs of retesting required to confirm and verify that remedial work has brought compaction within specified requirements shall be borne by the Contractor. 2) Contractor's Confirmation Tests During Performance of Remedial Work: a) Performance: Perform tests in manner acceptable to the Engineer. b) Frequency: Double amount specified for initial confirmation tests. 3. Water Testing Pipe: a. After Bedding the Pipe, Contractor Has the Following Option To: 1) Water -test pipe per Section 02700-3.02. 2) Backfill to surface, at his own risk, before water -testing pipe. b. If pipe does not pass test, uncover pipe, locate leaks, repair and retest, repeating until pipe section under test passes. 3.04 SCHEDULES A. Selection of Materials: Bayfront Levee Improvements Bedding Class 2 Aggregate Base Initial Backfill (to 12" over top of pipe) Class 2 Aggregate Base Backfill Fill suitable to site per Section 02300 END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 7 TRENCHING SECTION 02318 1 1 1 1 1 t 1 1 1 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02318 Page 8 1 1 1 1 1 1 1 1 1 1 1 1 SECTION 02325 SOIL-BENTONITE SLURRY CUTOFF WALLS PART 1 GENERAL 1.01 SUMMARY A. The installation of below grade soil-bentonite slurry seepage cutoff walls using soil mixing techniques at the locations shown on the plans. B. Section Includes: 1. Bentonite slurry mix. 2. Soil mixing and backfilling equipment. 3. Performance requirements for installed slurry walls. C. Related Sections: 1. Section 01020 - Work Constraints. 2. Section 01120 - Hazardous Materials Conditions and Procedures. 3. Section 01600 - Environmental Protection. 4. Section 02200 - Site Preparation. 5. Section 02260 - Excavation Support and Protection. 1.02 REFERENCES A. American Petroleum Institute (API) 1. Standard 13A, "Specifications for Oil -Well Drilling Fluid Materials." B. American Society for Testing and Materials (ASTM): 1. D 5084 — Standard Test for Hydraulic Conductivity 1.03 DEFINITIONS A. Bentonite Slurry: A stable colloidal mixture of water and bentonite clay. Other additives may be used as approved by the Engineer to improve the behavior of the slurry for construction. B. Cutoff wall: The cutoff wall is a soil-bentonite seepage retarder installed below the levee surface using soil mixing methods to reduce under -seepage and through -seepage in the levee system. C. Mixing and Backfill Equipment: The equipment for mixing and placing the slurry backfill shall be any type of applicable equipment capable of thoroughly mixing the backfill material (soil-bentonite slurry) into a homogeneous mixture. All mixing and backfill equipment or method shall be favorably reviewed by the Engineer. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 1 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 1.04 SCOPE OF WORK A. This section includes requirements for the construction of the cutoff walls and related work as indicated on the Plans and specified herein. t 1 1 1 1 t 1 1 1 B. The work consists of furnishing all plant, labor, equipment and materials to perform all operations as required to construct the cutoff walls. 1.05 SUBMITTALS A. Qualifications: Submit evidence that Contractor or Subcontractor is qualified to install slurry cutoff walls in conformance with Section 1.06A. B. Work Management Plan: Submit a work management plan demonstrating that Contractor's proposed slurry wall installation equipment and proposed construction techniques will not cause settlement or ground movement at adjacent properties. Submit copies of private property owners' agreements to allow placement of surplus material on their properties if planned. Include estimated volume of spoils and approximate rate at which spoils will be generated, planned disposal site location and methods of removal from the sites. C. Storm Water Pollution and Prevention Plan (SWPPP) and Erosion and Sediment Control Plan (ESCP). D. Material Data: Submit data indicating the source and material properties for bentonite clay and all proposed additives. E. Design Mix: Submit a mix design and hydraulic conductivity data for the soil- bentonite mix of the trial cutoff wall to verify the mix design and confirm that the construction meets project specifications. F. Slurry Management Plan: Prior to the start of construction activities, submit a slurry management plan that fully describes the handling of dry materials, mixing, pumping, and the disposition of excess and residual material. The slurry management plan shall include measures that will be implemented by the Contractor to reduce the potential for the release of slurry, in all forms, to the environment. G. Excavation Plan: Obtain favorable review of proposed excavation plan in accordance with Section 02260 before beginning any excavation necessary to remove interfering materials for below grade slurry wall installation. H. Equipment List: Submit list of proposed equipment, including loaded weights, to be used on the job sites. 1.06 QUALIFICATIONS A. Contractor shall submit evidence, subject to acceptance by the Engineer, that he or his slurry wall subcontractor is/are experienced and competent to construct slurry cutoff walls. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 2 I 1 I 1 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 B. Contractor or the subcontractor responsible for slurry cutoff wall construction shall have successfully completed at least three similar projects using soil- bentonite mixing with the same equipment proposed for the Work. The amount of slurry wall completed by the Contractor or subcontractor must total at least 1,000 lineal feet of wall at least 20 feet deep. 1.07 REGULATORY REQUIREMENTS A. Assume responsibility for meeting discharge requirements as specified herein. Particular attention and care shall be taken to prevent the discharge of materials or construction spoils into environmentally sensitive areas as defined on the Plans and specified herein. 1.08 QUALITY CONTROL A. Trial Cutoff Wall: Contractor shall complete a trial cutoff wall to the depth indicated on the Plans using the approved mix design and equipment. 1. Trial cutoff wall shall be a minimum of 20 feet in length, or as necessary to confirm its conformance with specification. 2. The Engineer will be present for observation during the installation of the trial cutoff wall. A City field representative will observe and record the slurry wall depth, inclination, overlap and mixing proportions and determine whether the soil-bentonite mix and cutoff wall construction techniques meet specification for a completed slurry cutoff wall. 3. The Engineer will collect at least one in -situ sample per day to test for hydraulic conductivity of the soil-bentonite mix of the trial cutoff wall. More samples may be collected if deemed necessary by the Engineer. Contractor shall coordinate with Engineer regarding testing. 4. The trial cutoff wall may become part of the completed Work, if the trial wall meets all specifications and the Engineer's approval. The Contractor may install the trial cutoff wall in a project location, or he may construct the wall offsite at a location subject to City approval. 5. Any trial cutoff wall that does not meet project specification and is located along the final project alignment shall be reconstructed so as to meet all project specifications. B. Contractor shall employ an ongoing quality control program to ensure that the completed soil-bentonite slurry walls meet the requirements specified herein. 1. The Engineer will observe and record soil-bentonite slurry cutoff wall depths, inclination, overlap and mixing proportions to determine conformance with these specifications including hydraulic conductivity. The Contractor shall stop soil-bentonite slurry wall construction at the Engineer's direction if his observations indicate that construction does not meet specification. 2. The Engineer will observe soil-bentonite slurry wall construction to determine if the field conditions encountered agree with previous subsurface investigations and design assumptions. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 a. Depending upon actual conditions encountered, it may become necessary to extend the depth of the soil-bentonite slurry wall. 3. Contractor shall adjust the bentonite slurry mix design and/or construction techniques as required to meet the specifications and reconstruct the trial cutoff wall. 4. All costs for mix design adjustment and trial cutoff wall reconstruction shall be borne by the Contractor. C. The Contractor shall maintain a daily quality control log and present it to the Engineer upon request. At a minimum the daily log shall record: 1. Site and weather conditions. 2. Start station and end station of work accomplished. 3. Equipment and personnel at site(s). 4. Date and time (start to finish) of each day's work. 5. Any sampling or testing with station location of sample(s). 6. Penetration rate, top and bottom depth/elevations and width of the cutoff wall, as applicable. 7. Slurry mix design (by percent weight), slurry injection rates and volume, as applicable. 8. Obstructions, interruptions, or other difficulties encountered during installation and how they are resolved, as applicable. PART 2 PRODUCTS 2.01 CUTOFF WALLS A. Cutoff walls shall be constructed to the lines, grades and cross sections as indicated on the Plans. B. Completed cutoff walls shall be installed vertically with a minimum width of 24 inches, and shall extend through the fill material into native Bay Mud as shown on the Plans. C. Completed cutoff walls shall be a homogeneous mixture of bentonite slurry and the in -situ or excavated soils. The backfill shall be made free from large lumps or pockets of fines, sand, or gravel by windrowing, disk harrowing, bulldozing, blading, or by other methods such as a pug mill, as approved by the Engineer. Slurry may be sluiced into the backfill mixture during blending operations to obtain the required consistency and slump. Sluicing with water will not be permitted. The backfill shall be placed so that no pockets of slurry are present in the completed slurry wall. The backfill shall not be deposited in any manner that will cause segregation. Dropping of backfill material into the slurry wall will not be permitted. 1. General cross section descriptions of the overburden fill at the slurry wall locations are shown on the Plans. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 4 1 1 1 1 1 I 1 1 1 1 1 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 2. The hydraulic conductivity of the completed soil-bentonite slurry cutoff wall. shall be equal to or less than 10"6 cm/second. 2.02 MATERIALS A. Slurry: 1. The material added to the soil shall be water -based bentonite slurry. 2. The purpose of the slurry is to assist in loosening the soil for penetration and mixing and to lower permeability. 3. The slurry shall be premixed in batch plants to combine materials in predetermined proportions as necessary to meet the specified properties of the mix. 4. Potable water, free of excessive amounts of deleterious substances that could adversely affect the properties of the slurry, shall be used to manufacture the slurry. Use on non -potable water is prohibited. 5. It is the responsibility of the Contractor that the slurry resulting from the water used shall always meet the standard of this specification. B. Water 1. Water shall be free of excess amounts of deleterious substances, as approved by the Engineer that could adversely affect the properties of the slurry or backfill. 2. The water shall comply with the following: a. pH6to8 b. Hardness < 50ppm c. Low dissolved salts, oil and total organic residue to allow proper hydration of bentonite. C. Bentonite used to prepare the slurry shall be pulverized powder or granular premium -grade sodium -cation montmorillonite and shall meet API Standard 13A. 1. Bentonite shall be tested by the manufacturer and shall meet all requirements as determined from a mixture of bentonite and distilled water prepared in accordance with API Standard 13A. 2. Bentonite used to prepare the slurry shall not degrade or otherwise lose its properties when exposed to salt water. D. Admixtures of softening agents, dispersions, retarders, or plugging and bridging agents may be added to the water or the slurry to permit efficient use of . materials and proper workability of the slurry. 1. Additives must be approved by the Engineer. 2. Admixtures shall be adjusted, as required, to provide the specified in situ performance. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 5 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2.03 EQUIPMENT A. Batching Equipment: 1. The batch plant shall be adequate so the resulting slurry meets specification and can be transferred to supply the construction equipment. 2. The precise arrangement and sequence of mixing shall be based on the results of the design mix program. The slurry mix shall be transferred to the field so that no additional field mixing is required. 3. Slurry shall be monitored and controlled to ensure proper proportioning. Density measurements shall be taken to verify the slurry proportions. Dry ingredients shall be batch mixed by weight to a predetermined density. 4. Batch mixing equipment shall be calibrated at the beginning of project production, and weekly thereafter until project completion. Water shall be controlled by flow meters and/or by volume level indicators. 5. Mixed slurry shall not be held more than three hours before delivery to the project site. B. Mixing and Backfilling Equipment: 1. The equipment for mixing and placing the soil-bentonite slurry shall be efficiently cutting, mixing and creating a cutoff wall with a minimum thickness of 24 inches and a maximum thickness of 36 inches. 2. The soil-bentonite slurry shall be a homogeneous mixture. 3. The equipment shall not impose vibrations or settlement on or near the levee. PART 3 EXECUTION 3.01 WORKING CONDITIONS A. The Contractor shall, prior to submitting his bid, visit the site and become familiar with actual site and soil conditions. No allowance will be made by the City for any unfavorable conditions or events which should have been foreseen from a thorough examination of the contract documents, the geotechnical reports, the site, available access and working conditions. 1. Observe the location of existing overhead utilities, nearby structures, and make necessary provisions for the mixing and backfilling equipment. B. The Contractor shall be prepared to encounter sandy and gravelly soils as well as some concrete debris, and the work may require additional excavation to complete the slurry cutoff wall. 1. Allowances have been made for the excavation, removal and disposal of interfering buried rubble that may be present at the slurry wall work sites. 2. Contractor shall protect excavation prior to and during the removal of interfering materials as required by Section 02260. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 6 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 1 1 1 1 1 1 1 1 1 1 1 1 1 a. The Contractor remains solely responsible for excavation safety. This responsibility is not waived when the Engineer or other City representatives enter the work site. 3.02 PROTECTION A. If existing live utilities are encountered, they are to be protected from damage and the proper authorities notified. B. Attention is directed to the Plans which indicate the presence of a high voltage underground PG&E electric utility near the East End Levee site. Service shall not be interrupted except as directed or accepted. C. Record discovered utilities at unmarked utility locations on record drawings. D. Open excavations, trenches, and the like are to be protected with fences, barricades, covers and railings as required. E. Every precaution shall be taken to prevent spillage when hauling on or adjacent to any public street or highway. Any spillage shall be promptly removed. 3.03 SAFETY A. The Contractor is solely responsible for job safety during the construction of soil- bentonite slurry walls, including support to all adjacent improvements at all times. B. Excavation for buried rubble removal shall not begin until shoring drawings have been returned by the Engineer in accordance with Section 02260. C. Stockpiles of soil, spoils, cuttings or other materials shall not be placed within 50 feet of a slope. 3.04 LIMITATIONS ON THE USE OF HEAVY EQUIPMENT A. Weight of construction equipment shall be adequately distributed or limited to reduce the potential for subgrade disturbance, slope instability, and damage to buried utilities. Contractor shall submit a description of all proposed equipment, including gross vehicle weights and weight distribution methods, prior to bringing any equipment to the site. B. Construction equipment shall maintain slow velocities. C. The Contractor should consider lightweight low -ground -pressure equipment. D. Haul routes for trucks as well as mixing and backfilling equipment shall be kept level and smooth to prevent equipment from bouncing and imposing high dynamic loads on subgrades or fill. E. Construction equipment shall not be parked within 50 feet of a slope. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 3.05 PREPARATION A. Surface Preparation: 1. Prior to slurry wall construction at the Seal Slough site, engineered fill shall be placed and compacted as shown on the Plans and specified herein. 2. Prior to slurry wall construction at the East End Levee site, the work area shall be cleared, grubbed and stripped in conformance with Section 02200, and the existing levee shall be excavated to elevation 107.5 feet on the Project datum. 3. Stabilize the working surface as required to withstand loads which may be placed upon it by the mixing and backfilling equipment and other work equipment. B. Dust and Erosion Control: 1. A temporary layer of aggregate base shall be placed over exposed ground surfaces within the work areas as needed to control dust and erosion during slurry wall and floodwall construction. 2. Temporary aggregate shall be removed after slurry wall and floodwall construction, before completing additional backfill or embankment fill. C. Environmental Protection 1. Facilities and work required for the protection of environmentally sensitive areas shall be completed in conformance with the Plans and these specifications before beginning site preparation for slurry wall construction. 2. The Contractor shall take all means necessary to prevent the discharge of slurry material, spoils, fuel, oil, or other construction debris into the identified environmentally sensitive areas. 3. All spills and other deleterious materials within the work site shall be promptly removed at the end of every work day and hauled off site. 4. In conformance with Section 01020, Section 01600, and the Special Provisions, all slurry wall construction shall be suspended during periods of inclement weather (rain or imminent rain) and high tide. 3.06 CUTOFF WALL ALIGNMENT A. Horizontal Alignment: 1. Slurry cutoff walls shall be accurately staked by the Contractor prior to construction. The Contractor is responsible for providing any offsets he needs for construction. The City will stake the layout lines shown on the Plans. 2. A shallow pre -trench shall be constructed to define the final installation location and shall be approved by the Engineer prior to slurry wall installation. CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 8 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 3. Continuity shall be maintained along the cutoff walls. No windows or gaps should exist within the finished cutoff wall. This may require remixing of an existing section of previously constructed cutoff wall. 1 I 1 1 1 1 1 1 B. Vertical Alignment: 1. Slurry cutoff walls shall be maintained vertical, limiting the amount of inclination during installation. 2. The mixing and backfilling equipment operator will control the vertical alignment of the cutoff wall to within 0.1 degree. The operator shall adjust the position of the equipment as necessary to maintain vertical installation to the required depth. 3.07 CUTOFF WALL INSTALLATION A. The cutoff wall shall be advanced in a continuous manner. The completed cutoff wall shall be a homogeneous mixture of the bentonite slurry and the in -situ soil. If necessary, the Contractor shall prepare and maintain a temporary working surface at a remote location, approved by the Engineer, from the cutoff wall alignment in which the soil bentonite backfill will be proportioned and mixed. Slurry shall be introduced into the trench at the time excavation begins. The level of the slurry in the open trench shall be maintained at least 3 feet above the groundwater level and no more than 2 feet below the temporary work surface, unless approved by the Engineer. B. The soil-bentonite slurry mixing action shall be steady and constant to ensure the proper amount of slurry is added and the proper amount of mixing time is allowed to meet the hydraulic conductivity specified. C. If the time of construction between adjacent cutoff wall panels exceeds 36 hours, the Contractor should remix one panel width (4 foot minimum for the continuous mixing method) of previously constructed cutoff wall unless otherwise directed by the Engineer. D. Installation of the cutoff wall using overlapping panel construction methods shall incorporate the following: 1. The cutoff wall shall have a primary panel followed by a secondary panel with an overlap of 1/3 of the panel length to create a continuous wall. 2. The minimum and maximum time allowed between the completion of a primary panel and the beginning of an overlapping secondary panel shall be determined by the Contractor and approved by the Engineer. 3. Installation of each individual panel shall be continuous without interruption. If an interruption of more than one hour occurs, the panel shall be remixed for the entire height of the element using the correct dosage of fresh bentonite slurry. E. The mixing speed shall be as established by the Contractor prior to construction, as required to meet the performance standards, and shall be adjusted as needed to achieve adequate mixing. If the mixing speed varies by more than ten percent from the parameter established prior to construction, the CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 9 1 1 1 1 1 1 1 1 1 1 SOIL-BENTONITE SLURRY CUTOFF WALLS SECTION 02325 Engineer may require additional testing to verify acceptable results at no additional cost to the City. F. Unless otherwise directed, the bottom of the cutoff wall shall meet the minimum penetration depth into the underlying Bay Mud as shown on the Plans: The final depth and penetration of the cutoff wall shall be measured from shaft penetration, checked by the Contractor, and approved by the Engineer immediately following penetration. G. Encountered obstructions including, but not limited to, boulders or timbers shall be removed to allow the cutoff wall to achieve the minimum penetration depth into the underlying Bay Mud. 1. The bid schedule provides an allowance for the removal and disposal of buried rubble at the Seal Slough and East End Levee sites. 2. Rocks, broken concrete, or other solid materials larger than 4 inches in greatest dimension removed during soil-bentonite slurry cutoff wall installation shall not be placed in fill areas, but removed from the project site in conformance with the bid schedule at no additional cost to the Contract. H. No cutoff wall trench shall be left unfilled or partially unfilled with soil-bentonite slurry at the conclusion of daily operations or during interruptions in continuous installation lasting more than one hour. 3.08 WET WEATHER AND WET SOIL CONDITIONS A. To the maximum extent possible within schedule constraints, slurry wall construction should take place during periods of suitable weather conditions. B. The Contractor should be aware of the continuous presence of tidal, lagoon and groundwater at the project sites, the level of which may fluctuate hourly due to tidal influence. C. Bay Mud: The Contractor is hereby informed that fills of variable thickness overlie Bay Mud in most of the work areas. All construction and excavation close to or into Bay Mud require methods and equipment suitable for soft to very soft soil conditions. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02325 Page 10 1 1 1 1 I 1 1 1 1 1 1 SECTION 02330 SHEET PILE CUTOFF WALLS PART 1 GENERAL 1.01 SUMMARY A. The optional installation of below grade vinyl sheet pile cutoff walls at the locations shown on the plans. B. Section Includes: 1. Vinyl sheet pile. 2. Installation equipment. 3. Performance requirements for installed sheet pile walls. C. Related Sections: 1. Section 01020 - Work Constraints. 2. Section 01600 - Environmental Protection. 3. Section 02200 - Site Preparation. 4. Section 02260 - Excavation Support and Protection. 5. Section 02354 - Hazardous Material Procedures. 1.02 SCOPE OF WORK A. This section includes requirements for the construction of the cutoff walls and related work as indicated on the Plans and specified herein. B. The work consists of furnishing all plant, labor, equipment and materials to perform all operations as required to construct the cutoff walls. 1.03 SUBMITTALS A. Qualifications: Submit evidence that Contractor or Subcontractor is qualified to install cutoff walls in conformance with Section 1.04. B. Work Management Plan: Submit a work management plan demonstrating that Contractor's proposed sheet pile wall installation equipment and proposed construction techniques will not cause settlement or ground movement at adjacent properties. Submit copies of private property owners' agreements to allow placement of surplus material on their properties. C. Storm Water Pollution and Prevention Plan (SWPPP) and Erosion and Sediment Control Plan (ESCP) D. Material Data: Submit data indicating the source and material properties for vinyl sheet pile. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 1 1 1 1 1 1 1 1 1 1 1 1 1 SHEET PILE CUTOFF WALLS SECTION 02330 E. Excavation Plan: Obtain favorable review of proposed excavation plan in accordance with Section 02260 before beginning any excavation necessary to remove interfering materials for below grade sheet pile wall installation. F. Equipment List: Submit list of proposed equipment, including loaded weights, to be used on the job sites and their weights. 1.04 QUALIFICATIONS A. Contractor shall submit evidence that he or his sheet pile wall subcontractor is/are experienced and competent to construct sheet pile cutoff walls. B. Contractor or the subcontractor responsible for sheet pile cutoff wall construction shall have successfully completed at least three similar projects with the same equipment proposed for the Work within the past five years. The amount of sheet pile cutoff walls completed by the Contractor or subcontractor must total at least 1,000 lineal feet of wall at least 20 feet deep. 1.05 QUALITY CONTROL A. Contractor shall employ an ongoing quality control program to ensure that the completed sheet pile cutoff walls meet the requirements specified herein. B. Contractor shall complete a trial cutoff wall to the depth indicated on the Plans. 1. Trial cutoff wall shall be a minimum of 20 feet in length, or as necessary tci confirm its conformance with specification. 2. The Engineer will be present for observation during the installation of the trial cutoff wall. A City field representative will observe and record the cutoff wall depth, inclination, sheet interlock and determine whether the cutoff wall construction techniques meet specification for a completed sheet pile cutoff wall. 3. The trial cutoff wall may become part of the completed Work, if the trial wall meets all specifications and the Engineer's approval. The Contractor may install the trial cutoff wall in a project location, or he may construct the wall offsite at a location subject to City approval. 4. Any trial cutoff wall that does not meet project specification and is located along the final project alignment shall be reconstructed so as to meet all project specifications. C. The Engineer will observe and record installed sheet pile cutoff wall depths, inclination, and sheet interlock to determine conformance with these specifications including hydraulic conductivity. The Contractor shall stop sheet pile cutoff wall construction at the Engineer's direction if his observations indicate that construction does not meet specification. D. The Engineer will observe sheet pile cutoff wall construction to determine if the field conditions encountered agree with previous subsurface investigations and design assumptions. Depending upon actual conditions encountered, it may become necessary to extend the depth of the sheet pile cutoff wall. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 2 SHEET PILE CUTOFF WALLS SECTION 02330 1 1 1 1 1 1 1 I 1 1. Contractor shall adjust construction techniques as required to meet the specifications and reconstruct the trial cutoff wall. 2. All costs for trial cutoff wall reconstruction shall be borne by the Contractor. E. The Contractor shall maintain a daily quality control log and present it to the Engineer upon request. At a minimum the daily log shall record: 1. Site and weather conditions 2. Start station and end station of work accomplished 3. Equipment and personnel at site(s) 4. Date and time (start and finish) of each day's work 5. Penetration rate, top and bottom depth/elevations and width of the cutoff wall, as applicable. 6. Obstructions, interruptions, or other difficulties encountered during installations and how they are resolved, as applicable. PART 2 PRODUCTS 2.01 CUTOFF WALL A. A cutoff wall shall be constructed to the lines, grades and cross sections as indicated on the Plans. B. The completed cutoff wall shall be installed vertically and shall extend through the existing fill material into native Bay Mud as shown on the Plans. C. The completed cutoff wall shall be an essentially impermeable wall constructed from interlocking sheet piles. 1. General cross sectional descriptions of the overburden fill at the cutoff wall locations are shown on the Plans. 2. The hydraulic conductivity of the completed sheet pile cutoff wall shall be equal to or less permeable than 10-6 cm/second. 2.02 MATERIALS A. Sheet piling supplied for the project shall be manufactured by an entity with proven experience, quality control, availability, production capability, and that is unencumbered by licensing and patent restrictions; such as: Crane Materials International 4501 Circle 75 Parkway, Suite E-5370 Atlanta, GA 30339 Phone: 770-933-8166 Fax: 770-933-8363 B. Alternate products or manufacturers may be used, provided they have products in service for applications similar in scope and function to this project that meet or exceed all the performance requirements of this specification. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 3 1 1 1 1 1 1 1 1 1 1 1 SHEET PILE CUTOFF WALLS SECTION 02330 2.03 PHYSICAL CHARACTERISTICS A. Sheet Pile Material 1. All sheet piling shall be manufactured entirely from a rigid, high impact, UV -inhibited, weatherable vinyl compound. 2. All exposed surfaces of the sheet piling shall be UV resistant, and comprised of virgin material with a minimum ASTM D4216 Cell Classification of 1-41444-33 to ensure reliable performance and color consistency. 3. If mono -extrusion technology is used, the entire sheet pile must be comprised of virgin material with a minimum ASTM D4216 Cell Classification of 1-41444-33. B. The section modulus of the sheet piling shall be no less than 17.6 in3 per linear foot of wall. C. The moment of inertia of the sheet piling shall be no less than 79 in4 per linear foot of wall. D. The sheet piling shall have a minimum thickness of 0.29 inches. E. The sheet piling shall have a maximum section depth of 9 inches to prevent web buckling. F. Coverage and Interlocks 1. The sheet piling shall have a minimum width of 24 inches per sheet resulting in a maximum of one interlock per two linear feet of wall. 2. All male interlocks shall incorporate I -Beam Lock reinforcement to resist lock separation and decrease seepage. G. The sheet piling shall be a standard manufacturer's color; generally grey, buff, clay or tan in color. Color samples shall be approved by the Engineer. PART 3 EXECUTION 3.01 WORKING CONDITIONS A. The Contractor shall, prior to submitting his bid, visit the site and become familiar with actual site and soil conditions. No allowance will be made by the City for any unfavorable conditions or events which should have been foreseen from a thorough examination of the contract documents, the geotechnical reports, the site, available access and working conditions. 1. Observe the location of existing overhead utilities, nearby structures, and make necessary provisions for the installation equipment. B. The Contractor shall be prepared to encounter sandy and gravelly soils as well as some concrete debris, and the work may require additional excavation to complete the sheet pile cutoff wall. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 4 1 1 1 1 1 1 1 1 SHEET PILE CUTOFF WALLS SECTION 02330 1. Allowances have been made for the excavation, removal and disposal of interfering buried rubble that may be present at the cutoff wall work sites. 2. Contractor shall protect excavation prior to and during the removal of interfering materials as required by Section 02260. a. The Contractor remains solely responsible for excavation safety. This responsibility is not waived when the Engineer enters the work site. 3.02 PROTECTION A. If existing live utilities are encountered, they are to be protected from damage and the proper authorities notified. B. Attention is directed to the Plans which indicate the presence of a high voltage underground PG&E electric utility near the East End Levee site. Service shall not be interrupted except as directed or accepted. C. Record discovered utilities at unmarked utility locations on record drawings. D. Open excavations, trenches, and the like are to be protected with fences, barricades, covers and railings as required. E. Every precaution shall be taken to prevent spillage when hauling on or adjacent to any public street or highway. Any spillage shall be promptly removed. 3.03 SAFETY A. The Contractor is solely responsible for job safety during the construction of sheet pile cutoff walls, including support to all adjacent improvements at all times. B. Excavation shall not begin until shoring drawings have been returned by the Engineer in accordance with Section 02260. C. Stockpiles of soil, spoils, cuttings or other materials shall not be placed within 50 feet of a slope. 3.04 LIMITATIONS ON THE USE OF HEAVY EQUIPMENT A. Weight of construction equipment shall be adequately distributed or limited to reduce the potential for subgrade disturbance, slope instability, and damage to buried utilities. Contractor shall submit a description of all proposed equipment, including gross vehicle weights and weight distribution methods, prior to bringing any equipment to the site. B. Construction equipment shall maintain slow velocities. C. The Contractor should consider lightweight low -ground -pressure equipment. D. Haul routes for trucks as well as pile driving equipment shall be kept level and smooth to prevent equipment from bouncing and imposing high dynamic loads on subgrades or fill. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 5 SHEET PILE CUTOFF WALLS SECTION 02330 1 1 1 I 1 1 1 1 1 E. Construction equipment shall not be parked within 50 feet of a slope. 3.05 PREPARATION A. Surface Preparation: 1. Prior to slurry wall construction at the East End Levee site, the work area shall be cleared, grubbed and stripped in conformance with Section 02200, and the existing levee shall be excavated to the elevation shown on the Drawings. 2. Stabilize the working surface as required to withstand loads which may be placed upon it by the mixing and backfilling equipment and other work equipment. B. Dust and Erosion Control: 1. A temporary layer of aggregate base shall be placed over exposed ground surfaces within the work areas as needed to control dust and erosion during cutoff wall and floodwall construction. 2. Temporary aggregate shall be removed after cutoff wall and floodwall construction, before completing additional backfill or embankment fill. C. Environmental Protection 1. Facilities and work required for the protection of environmentally sensitive areas shall be completed in conformance with the Plans and these specifications before beginning site preparation for cutoff wall construction. 2. The Contractor shall take all means necessary to prevent the discharge of material, spoils, fuel, oil, or other construction debris into the identified environmentally sensitive areas. 3. All spills and other deleterious materials within the work site shall be promptly removed at the end of every work day and hauled off site. 4. In conformance with Section 01020 and the Special Provisions, all sheet pile cutoff wall construction shall be suspended during periods of inclement weather (rain or imminent rain) and high tide. 3.06 CUTOFF WALL ALIGNMENT A. Horizontal Alignment: 1. The cutoff wall shall be accurately staked by the Contractor prior to construction. The Contractor is responsible for providing any offsets he needs for construction. The City will stake the layout lines shown on the Plans. 2. A shallow pre -trench shall be constructed to define the final installation location and shall be approved by the Engineer prior to cutoff wall installation. 3. Continuity should be maintained along the cutoff walls. No windows or gaps should exist within the finished cutoff wall. This may require repositioning of an existing section of previously constructed cutoff wall. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 6 1 1 1 1 I 1 1 1 1 1 SHEET PILE CUTOFF WALLS SECTION 02330 B. Vertical Alignment: 1. The cutoff wall shall be maintained vertical, limiting the amount of inclination during installation. 2. The pile driving equipment operator will control the vertical alignment of the cutoff wall to within 0.1 degree. The operator shall adjust the position of the equipment as necessary to maintain vertical installation to the required depth. 3.07 CUTOFF WALL INSTALLATION A. The cutoff wall shall be advanced in a continuous manner. B. Installation of the cutoff wall shall use interlocking sheet pile construction methods shall incorporate the following: C. Unless otherwise directed, the bottom of the cutoff wall shall meet the minimum penetration depth into the underlying Bay Mud as shown on the plans. The final depth and penetration of the cutoff wall shall be measured from shaft penetration, checked by the Contractor, and approved by the Engineer immediately following penetration. D. Encountered obstructions including, but not limited to, boulders or timbers shall be removed to allow the cutoff wall to achieve the minimum penetration depth into the underlying Bay Mud. 1. The bid schedule provides an allowance for the removal and disposal of buried rubble at the East End Levee site. 2. Rocks, broken concrete, or other solid materials larger than 4 inches in greatest dimension removed during soil-bentonite slurry cutoff wall installation shall not be placed in fill areas, but removed from project site in conformance with the bid schedule at no additional cost to the Contract. E. Sheet pile cutoff walls shall be installed so that the top of the sheet piling is completely buried and so as to allow for the completion of other parts of the Work. 1. Sheet piling may be cut to meet this criterion as long as the full depth of required penetration is met. 2. Exposed sheet piling left at the conclusion of daily operations or otherwise exposed to workers shall be clearly identified and appropriate protective and safety measures taken. F. Sheet piles may not be joined together vertically to extend the wall height. 1. If additional sheet piling is needed to reach the required penetration as confirmed by the Engineer in the field, installed sheet piles shall be removed and longer sheet piles furnished and driven to the requisite depth. CITY OF SAN MATEO Bayfront Levee Improvements Section 02330 Page 7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SHEET PILE CUTOFF WALLS SECTION 02330 3.08 WET WEATHER AND WET SOIL CONDITIONS A. To the maximum extent possible within schedule constraints, sheet pile wall construction should take place during periods of suitable weather conditions. B. The Contractor should be aware of the continuous presence of tidal, lagoon and groundwater at the project sites, the level of which may fluctuate hourly due to tidal influence. C. Bay Mud: The Contractor is hereby informed that fill of variable thickness overlie Bay Mud in most of the work areas. All construction and excavation close to or into Bay Mud require methods and equipment suitable for soft to very soft soil conditions. END OF SECTION CITY OF SAN MATEO Baytront Levee Improvements Section 02330 Page 8 I I I I I I I I I I I I I I I I I 1 1 1 1 i 1 t 1 1 1 1 1 1 SECTION 02622 FILTER FABRIC AND GEOTEXTILES PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Engineering Fabrics (Geotextiles). 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. D 3776 - Test Methods for Mass per Unit Area (Weight) of Woven Fabric. 2. D 4491 - Test Methods for Water Permeability of Geotextiles by Permittivity. 3. D 4632 - Test Method for Grab Breaking Load and Elongation of Geotextiles. 1.03 DEFINITIONS A. Filter Fabric for Drains and Underdrains: Nonwoven filter fabric manufactured from polyester, nylon, or polypropylene material, or any combination thereof. B. Geotextile: Woven Polypropylene geotextile fabric C. Geogrid: Woven polyester biaxial geogrids for base course reinforcement and subgrade stabilization applications. 1M4 PROJECT CONDITIONS A. Take field measurements to determine the exact lengths and dimensions of the surfaces to receive the fabric. 1.05 SUBMITTALS A. Product data with a description of the applicable use location within the Project. B. Samples. C. Quality Control Submittals: 1. Certificates of Compliance. 2. Manufacturer's Instructions. 1.06 DELIVERY, STORAGE, AND HANDLING A. Storage and Protection: 1. Furnish engineering fabrics in protective covers capable of protecting the fabric from ultraviolet rays, abrasion, and water. CITY OF SAN MATEO Bayfront Levee Improvements Section 02622 Page 1 I I I I I I I I I I I I I I I I I I I FILTER FABRIC AND GEOTEXTILES SECTION 02622 1 1 1 1 1 1 1 PART 2 PRODUCTS 2.01 MANUFACTURERS A. Filter Fabric for Drains and Underdrains - One of the Following or Equal: 1. Geotex 501. 2. Mirafi 140NC. B. Geotextile for separation and stabilization over very weak subgrades - One of the Following or Equal: 1. Mirafi, 600X Geofabric 2. Geotex 315ST C. Erosion control blanket for levee revegetation shall be Coir 125BN. 2.02 MATERIAL REQUIREMENTS A. Physical Properties: Filter Fabric to meet the following minimum requirements. Property Test Value Test Method Minimum Weight 5.4 ounces per square yard ASTM D3776 Minimum Grab Tensile Strength 150 pounds ASTM D4632 Minimum Elongation at Break 50% ASTM D4632 Minimum Puncture Strength 80 pounds ASTM D4833 Minimum Burst Strength 300 pounds per square inch ASTM D3786 Minimum Apparent Open Size #70 ASTM D4751 Minimum Permittivity 1.0 per second ASTM D4491 Minimum UV Resistance 70% ASTM D4355 PART 3 EXECUTION 3.01 PREPARATION A. Surface Preparation: During grading operations, take care not to disturb or scarify the subgrade. This may require use of lightweight dozers for low strength soils such as saturated, cohesionless, or low cohesion soils. Recompact to minimum 95 percent at maximum density if subgrade is scarified. B. Prior to placement of fabric; prepare surface to smooth conditions free of debris, depressions, or obstructions which may damage the fabric. CITY OF SAN MATEO Bayfront Levee Improvements 1 Section 02622 Page 2 1 1 1 1 1 1 1 1 1 1 1 1 FILTER FABRIC AND GEOTEXTILES SECTION 02622 3.02 INSTALLATION A. Follow manufacturer's installation and anchorage instructions as complimented herein. B. Place the fabric smoothly without folds or wrinkles. C. Use special care when placing the fabric in contact with the soil so that no void spaces occur between the geotextile and the prepared surface. D. Overlap the fabric sheets as indicated on the Plans or according to manufacturer's installation, whichever is greater. E. Place drainage aggregate on the geotextile as specified. 3.03 FIELD QUALITY CONTROL A. Inspection: Before covering, the conditions of the fabric will be observed by the Engineer to determine that no holes or rips exist in the fabric. Repair all such occurrences by placing a new layer of fabric extending beyond the defect in all directions a distance equal to the minimum overlap required for adjacent rolls. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02622 Page 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 FILTER FABRIC AND GEOTEXTILES SECTION 02622 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02622 Page 4 1 1 1 1 I 1 1 1 1 1 1 1 SECTION 02700 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS PART 1 GENERAL 1.01 SUMMARY A. Section Includes: High Density Polyethylene (HDPE) Pipe and Fittings. B. Related Sections: 1. Section 02318 — Trenching 2. Section 02750 — Elastomeric Check Valves 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. D638 — Standard Test Method for Tensile Properties of Plastics. 2. D746 — Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact. 3. D790 — Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. 4. D1248 — Standard Specification for Polyethylene Plastics Molding and Extrusion Materials. 5. D1505 — Standard Test Method for the Density of Plastics. 6. D1525 — Standard Test Method for Vicat Softening Temperature of Plastics. 7. D1603 — Standard Test Method for Carbon Black in Olefin Plastics. 8. D2321 - Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity -Flow Applications. 9. D2657 — Standard Practice for Heat -Joining Polyolefin Pipe and Fittings. 10. D2774 — Standard Practice for Underground Installation of Thermoplastic Pressure Pipe. 11. D2837 — Standard Practice for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials. 12. D3035 — Standard Specification for Polyethylene Plastic Pipe (DR -PR) Based on Controlled Outside Diameter. 13. D3261 — Standard Specification for Butt Fusion Polyethylene Plastic Fittings for Polyethylene Pipe and Tubing. 14. D3350 — Standard Specification for Polyethylene Plastic Pipe and Fittings Materials. 15. F714 — Standard Specification for Polyethylene Plastic Pipe (SDR-PR) Based on Outside Diameter. B. American Water Works Association (AWWA): 1. C906- Polyethylene (PE) Pressure Pipe And Fittings, 4 In. (100 mm) Through 63 In. (1,575 mm), For Water Distribution And Transmission, and all included references. C. The Society of the Plastics Industry, Plastic Pipe Institute Division PE 3408. CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 1 I 1 1 I 1 1 1 1 1 1 1 1 1 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 1 1 1 1 1 1 1 1 1.03 ABBREVIATIONS A. HDPE: High Density Polyethylene Pipe B. ID: Inside diameter of piping. C. OD: Outside diameter of piping. D. SDR: Standard Dimension Ratio. 1.04 SUBMITTALS A. Product Data: Describe materials and installation equipment including fusion machine. Include optimum range of fusion conditions such as ambient temperature and humidity, fusion temperature, interface pressure, and heating and cooling times. B. Manufacturer's Published Installation Instructions. C. Certificates: 1. Submit manufacturer's certificate attesting that high -density polyethylene pipe (HDPE) and fitting types meet specified requirements. 2. Manufacturer's certification of date and location of manufacture of high - density polyethylene pipe and fittings for each lot delivered. D. Qualifications of installation crew for high -density polyethylene pipe including qualifications of the fusion machine technician. E. Trial Fusion Welds: Submit samples of fusion welds for approval prior to fusion and installation of pipe as specified. 1.05 QUALITY ASSURANCE A. Contractor shall certify in writing the persons performing the heat fusion of the HDPE pipe have received proper training in the pipe manufacturer's recommended procedure and have a minimum of three years experience in the installation of similar HDPE piping systems from the same manufacturer. Contractor shall maintain records of the trained personnel and shall certify the training was received not more than one year prior to commencing installation of HDPE pipe. B. Markings on the pipe shall be in accordance with AWWA C-906. Markings shall also include name and trademark of manufacturer and hydrostatic design basis. 1.06 DELIVERY, STORAGE, AND HANDLING A. Protect piping materials from sunlight, scoring, and distortion. Any HDPE pipe not having adequate ultraviolet inhibitor shall not be stored outside in direct sunlight. Any HDPE pipe that has been cut, gouged, scored, or otherwise damaged before installation shall be repaired or replaced. All cuts, gouges, scores, or other physical deformations in excess of ten percent of the pipe wall CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 2 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 1 1 1 1 1 1 thickness shall be cut out and removed. The remaining pipe sections may be rejoined as specified herein. B. Do not allow surface temperatures on pipe and fittings to exceed 120 degrees Fahrenheit. C. Store and handle HDPE pipe and fittings as recommended by manufacturer in published instructions. D. Pipe Handling: Lift, move, or lower pipe and fittings only with wide fabric choker slings. Wire rope or chain shall not be used. Slings shall be of sufficient capacity for the load, and shall be inspected before use. Worn or defective equipment shall not be used. 1.07 WARRANTY A. Provide manufacturer's standard warranty for materials and workmanship for a period of one year from the date of final acceptance. PART 2 PRODUCTS 2.01 MANUFACTURERS A. One of the following or equal: 1. CP Chem, Performance Pipe. 2. CSR, PolyPipe. 2.02 MATERIALS A. High density polyethylene in accordance with ASTM D1248, Type 111, Class C, Category 5, Grade P 34. HDPE pipe and fittings shall have Plastic Pipe Institute (PPI) designation and minimum cell classification in accordance with ASTM D 3350 as scheduled. 1. Polyethylene shall be virgin material containing no scrap, regrind, or reworked material except where permitted in the referenced standards. 2. Pipe and fitting material shall be uniform and homogeneous throughout and free of cracks, holes, depressions, or other defects. B. HDPE shall meet or exceed the properties in the following schedule. Property Test Method Nominal Value Density ASTM D 1505 0.955 grams per cubic centimeter Flexural Modulus ASTM D 790 110,000 pounds per square inch Hydrostatic Design Basis ASTM D 2837 1,600 pounds per square inch UV Stabilizer ASTM D 1603 2 percent carbon black Tensile Strength at Yield ASTM D 638 3,200 pounds per square inch Tensile Strength at Break ASTM D 638 5,000 pounds per square inch Modulus of Elasticity ASTM D 638 130,000 pounds per square inch CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 3 1 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 1 1 1 1 1 1 1 1 1 1 1 Property Test Method Nominal Value Maximum Brittleness Temperature ASTM D 746 minus 180 degrees Fahrenheit Minimum Vicat Softening Temperature ASTM D 1525 255 degrees Fahrenheit PPI Designation - PE 3608 Cell Classification ASTM D 3350 345464C 2.03 HDPE PIPING A. Dimensions shall be based on controlled outside diameter in accordance with ASTM F 714. 1. SDR: Pipe shall have a maximum SDR of 17. 2. ID: Nominal diameter for outfall pipe is 12 inches. 3. Pipe size shall be selected to best match conditions found in the field at the tie-in location shown on the Plans. B. Color of pipe and fittings: Internal and external color shall be black with UV inhibitor. 2.04 FITTINGS AND CUSTOM FABRICATIONS A. HDPE fittings and custom fabrications shall meet all requirements of HDPE piping. B. Fittings and custom fabrications shall be manufactured with same material as piping, shall be provided by pipe manufacturer, and shall be compatible with components in the same system as well as other connected systems as required. Pipe dimensions may be IPS or DIP to best match conditions found in in the field. C. Butt fusion edges shall be manufactured to the same outside diameter, wall thickness, and tolerances as the mating pipe. D. All fittings and custom fabrications shall have the same pressure rating as the mating pipe. Pressure de -rated fittings or fabrications are prohibited. 1. Molded fittings shall be manufactured in accordance with ASTM D3261 and shall be so marked. Each production lot of molded fittings shall be subjected to the tests required by ASTM D3261. 2. Fabricated fittings shall be constructed through heat fusion joining of specially machined shapes cut from HDPE pipe, sheet stock, or molded fittings. 2.05 ACCESSORIES A. Flanged Adapters: Flanged adapters shall be manufactured with sufficient through -bore length to be clamped in a butt fusion joining machine without the use of a stub -end holder. The face of the flanged adapter shall be machined with a series of small, v -shaped grooves to provide ability for gasketless seal or to restrain gasket against blowout. 1. Flange Bolts: Flange bolts, nuts and washers shall be Type 316 stainless steel. CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 4 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 1 1 1 1 1 1 1 B. Hymax Couplings: A Hymax coupling shall be provided to join plain end HDPE pipe to existing plain end pipe as shown on the Plans and encountered in the field. 1. Coupling shall be a sleeve type design consisting of center sleeve, one end ring and multi -range two layered EPDM gasket and stainless steel spanner per end, and two type 304 stainless steel nuts and bolts per end. 2. Coupling body and compression end rings shall be fabricated of carbon steel. 3. Hydraulic wide range gasket shall be an EPDM gasket, designed with a multi -layered wide range removable outer layer. The gasket shall be hydraulically actuated with a pressure -equalizing dam, pressure cavity, and sealing lip for the test pressure indicated herein. 4. Nuts and bolts shall be AISI 304 grade stainless steel. Bolts shall be coated with an anti -seize type coating to prevent galling. 5. Coupling shall be fusion bond epoxy coated on the interior and exterior. 6. Coupling shall provide a watertight seal when installed and subject to the indicated test pressure, subject to angular deflection of 4-10 degrees per end, and longitudinal pipe movement up to 10 mm. 2.06 SOURCE QUALITY CONTROL A. Manufacturer's Quality Control. The pipe and fitting manufacturer shall have an established quality control program responsible for inspecting incoming and outgoing materials. 1. Incoming polyethylene materials shall be inspected for density, melt flow rate, and contamination. The cell classification properties of the material shall be certified by the supplier and verified by Manufacturer's Quality Control. Incoming materials shall be approved by Manufacturer's Quality Control before processing into finished goods. 2. Outgoing materials shall be checked for: a. Outside diameter, wall thickness, and eccentricity in accordance with ASTM D2122 at a frequency of at least once every hour. b. Out of roundness at a frequency of at least once every hour. c. Straightness, inside and outside surface finish, markings and end cuts shall be visually inspected in accordance with ASTM F714 on every length of pipe. d. Quality Control shall verify production checks and test for: 1) Density in accordance with ASTM D1505 at a frequency of at least once per extrusion lot. 2) Melt Index in accordance with ASTM D1238 at a frequency of at least once per extrusion lot. 3) Carbon content in accordance with ASTM D1603 at a frequency of at least once per day per extrusion line. 4) Quick burst pressure in accordance with ASTM D1599 at a frequency of at least once per production run. For pipe larger than 4 inches in diameter, quick burst test may be substituted with the ring tensile strength test when approved by the Engineer. 5) Five -second pressure in accordance with ASTM D1598 at a frequency of at least once per production run. For pipe larger than 18 inches in diameter, five -second pressure test may be CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 5 1 1 1 1 1 1 1 1 1 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 substituted with the ring tensile strength test or other manufacturer tests when approved by the Engineer. 6) Ring tensile strength in accordance with ASTM D2290 at a frequency of at least once per day per line. 7) Bend back test as specified herein at least once per day per extrusion lot. e. X-ray inspection shall be used to inspect molded fittings for voids, and knit line strength shall be tested. All fabricated fittings shall be inspected for joint quality and alignment. Manufacturer shall certify no voids were discovered for all fittings molded. 3. Quality Control and Quality Assurance Records: Manufacturer shall maintain Quality Control and Quality Assurance records for a minimum of one year after manufacture of pipe and fittings associated with this project. Records shall be accessible by City at any time during this period. 4. Compliance Tests: In case of conflict with manufacturer's certifications, the Contractor, Engineer, or City may request retesting by the manufacturer or have retests performed by an outside testing service. All retesting shall be at the requestor's expense, and shall be performed in accordance with this Section. PART 3 EXECUTION 3.01 INSTALLATION A. General: 1. Install pipe and fittings as specified herein and where applicable, with manufacturer's published instructions. B. Installation Of HDPE Piping: 1. Joining: a. Heat Fusion Joining: Joints between plain end pipes and between pipe and fittings shall be made by butt fusion. Joints between pipes and saddle branch fittings shall be made utilizing saddle fusion employing only procedures that are recommended by the pipe and fitting manufacturer. Internal and external beads shall be of adequate size to ensure proper heat fusion. Beads shall not be removed. 1) Heat fusion joining shall only be performed by properly trained and certified technicians. Contractor shall certify in writing that persons performing heat fusion joining have received proper training in the manufacturer's recommended procedure and have at least three (3) years current experience in heat fusion welding process for pipes 30 inches in diameter and larger. Contractor shall also certify training was received not more than 12 months prior to commencing heat fusion joining of pipe for this project and shall maintain records of trained personnel. 2) Certified personnel shall ensure adequate ambient conditions are present before commencing heat fusion joining process. Heater plate and pipe or fitting ends shall be cleaned and prepared in accordance with manufacturer's recommended procedures. CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 6 I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 i 1 1 1 1 1 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 3) Properly cover heater plate when not in use to protect from damage and debris. b. Heat Fusion Training Services: The manufacturer shall provide additional training in the manufacturer's recommended butt fusion and saddle fusion procedures to the Contractor's installation personnel and to the City's project representative(s) prior to the start of construction. c. Mechanical Joining: Polyethylene pipe and fittings may be joined together or to other pipe materials by means of flanged connections (flange adapters as specified herein) or flexible couplings designed for joining polyethylene pipe or for joining polyethylene pipe to another pipe material. Flexible couplings shall be fully pressure rated and fully thrust restrained such that when installed in accordance with manufacturer's recommendations, a longitudinal load applied to the mechanical coupling will cause the pipe to yield before the mechanical coupling disjoins. 2. Installation: a. General: 1) The Manufacturer shall package products for shipment in a manner suitable for safe transport by commercial carrier. When delivered, a receiving inspection shall be performed, and any shipping damage shall be reported to the manufacturer within 7 days. Damaged pipe shall be promptly removed from the job site. 2) Prior to making a terminal connection of each individual run of HDPE pipe, the temperature of the pipe should be allowed to approach the service temperature at which the pipe is intended to operate. 3) All necessary precautions shall be taken to ensure a safe working environment in accordance with applicable codes and standards. 4) All debris and foreign objects shall be removed from pipe prior to testing and final acceptance. b. Large Diameter Fabricated Fittings. Fabricated fittings shall be butt fusion welded to pipe as indicated on the Plans. c. Mechanical Joint & Flange Installation: Mechanical joints and flange connections shall be installed in accordance with the manufacturer's recommended procedure. Flange faces shall be centered and aligned to each other before assembling and tightening bolts. Every effort shall be made to ensure that the opposing faces of the flange assemblies mate up securely at a temperature approximately the same as the service temperature. In no case shall the flange bolts be used to draw the flanges into alignment. Bolt threads shall be lubricated, and flat washers shall be fitted under the flange nuts. Bolts shall be evenly tightened according to the tightening pattern and torque step recommendations of the manufacturer. At least 1 hour after initial assembly, flange connections shall be re -tightened following the tightening pattern and torque step recommendations of the manufacturer. The final tightening torque shall be 100 ft-lbs or less as recommended by the manufacturer. All bolts, nuts, and other fasteners shall be Type 316 stainless steel, CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 7 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HIGH DENSITY POLYETHYLENE PIPE AND FITTINGS SECTION 02700 3.02 FIELD QUALITY CONTROL A. Testing: 1. Butt Fusion Testing: On each day heat fusion joining is performed, the first fusion shall be a trial fusion. The trial fusion shall be allowed to cool completely before cutting fusion test strips. Cut the test strips and perform the bend back test in accordance with AWWA C 906. If the test fails, a new trial fusion shall be made, cooled completely and tested. Butt fusion of pipe to be installed shall not commence until a trial fusion has passed the bend back test. 2. Heater Plate Testing: Heater plate temperature shall be continuously monitored with properly calibrated thermometers. Thermometers shall be calibrated twice daily through the use of pyrometers in order to ensure proper heating temperature. 3. Data Logging: a. A data logger shall be installed on the fusion heated joining machine. Data logger shall record for each joint the minimum temperature of joint fusion, interface pressure of the fused joint, and whether or not joint was acceptable. 4. Saddle Fusion: Perform one trial fusion for each size saddle and perform bend back test. If test fails, perform an additional trial fusion and bend back test. 5. Pressure Testing: a. Test pump discharge pipe under hydrostatic pressure of 100 pounds per square inch and prove watertight prior to backfill. b. Sustain pressure in pipe for not less than two hours. If leaks develop, replace joints and repeat test until entire system is proven watertight. c. All hydrostatic tests shall be made in the presence of the Engineer or his designated representative. No trench shall be backfilled until piping has been reviewed, tested and accepted. d. Temperature of test water shall be no higher than 73 degrees Fahrenheit. e. Furnish necessary equipment and appurtenances to complete the test(s). B. Inspection: Contractor shall perform television inspection of all HDPE piping systems after all debris and foreign objects have been removed and prior to pressure testing. The television inspection shall be performed in the same direction each time and shall be done with color closed circuit television camera in VHS format. Submit a copy of the VHS videotapes for approval prior to final acceptance. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02700 Page 8 SECTION 02722 AGGREGATE BASE COURSE 1 1 1 1 1 1 1 PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Aggregate base course. B. Related Sections: 1. Section 02300 - Earthwork. 2. Section 02742 - Asphaltic Concrete Paving. 3. Section 02990 - Pavement Restoration. 1.02 REFERENCES A. American Society of Testing and Materials (ASTM): 1. C 117 - Test Method for Material Finer than 75 OM (Number 200) Sieve in Mineral Aggregate by Washing. 2. C 136 - Method for Sieve Analysis of Fine and Coarse Aggregates. 3. D 4318 - Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils. B. State of California Department of Transportation. 1. CALTRANS - Standard Specifications. 1.03 SUBMITTALS A. Product Data: 1. Source, gradation, and testing data for aggregate base course. B. Quality Control: 1. Test Reports: Reports for tests required by Sections of CALTRANS Standard Specifications. 2. Certificates of Compliance: Certificates as required by Sections of CALTRANS Standard Specifications. 1.04 DELIVERY, STORAGE, AND HANDLING A. Storage and Protection: Protect from segregation and excessive moisture during delivery, storage, and handling. CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 1 1 AGGREGATE BASE COURSE SECTION 02722 1 1 1 1 1 1 PART 2 PRODUCTS 2.01 MATERIALS A. Aggregate Base Course: 1. Class 2, 3/4 -inch maximum aggregate size free from vegetable matter and other deleterious substances, and of such nature that aggregate can be compacted readily under watering and rolling to form a firm, stable base. 2. Materials derived from processing demolished or removed asphalt concrete are not acceptable. 3. Coarse aggregate material retained in Number 4 sieve shall consist of material of which at least 25 percent by weight shall be crushed particles when tested in accordance with California Test 205. 4. Aggregate shall not be treated with lime, cement, or other chemical material before the Durability Index test is performed. 5. Aggregate grading and sand equivalent tests shall be performed to represent not more than 500 cubic yards or one day's production of material, whichever is smaller. 6. Grade within the limits and conform to quality requirements as follows when tested in accordance with California Test 202: Sieve Sizes (Square Openings) Percent by Weight Passing Sieve 1 inch 100 314 inch 90-100 Number 4 35-55 Number 30 10-30 Number 200 2-9 Quality Requirements Description California Test Minimum Test Result Resistance (R Value) 301 78 Sand Equivalent 217 22 Durability Index 229 35 CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 2 1 1 1 1 1 1 1 AGGREGATE BASE COURSE SECTION 02722 PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: Examine conditions upon which the work specified in this Section depends for defects that may influence installation and performance. B. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.02 PREPARATION A. Subgrade Preparation: Prepare as specified in Section 02300, "Earthwork." 3.03 INSTALLATION A. Furnish, spread, and compact aggregate base course material to the lines, grades, and dimensions indicated on the Plans. 1. Spreading: Spread in accordance with sections of CALTRANS Standard Specifications. 2. Compacting: Compact in accordance with sections of CALTRANS Standard Specifications to the relative compactions specified in relevant sections of these specifications. 3.04 FIELD QUALITY CONTROL A. Tests: Perform field tests as required by sections of CALTRANS Standard Specifications. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 3 I I I I I I I I I I I I I I I AGGREGATE BASE COURSE SECTION 02722 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 4 1 1 1 1 1 1 1 1 1 SECTION 02725 DECOMPOSED GRANITE PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Resin -stabilized decomposed granite (DG) for restoring and constructing pathways as shown on the Plans and specified herein. B. Related Sections: 1. Section 02200 - Site Preparation. 2. Section 02300 - Earthwork. 3. Section 02722 - Aggregate Base. 1.02 REFERENCES A. American Society of Testing and Materials (ASTM): 1. C 136 - Method for Sieve Analysis of Fine and Coarse Aggregates. 2. D 1599 - Marshall Stability Test. 3. D 2950 - Density of Bituminous Concrete in Place by Nuclear Methods. 1.03 SUBMITTALS A. Product Data 1. Source, gradation, and testing data for decomposed granite. 2. Resin emulsion. B. Samples 1. Two (2) pound sample of decomposed granite. 2. One sample "puck" of decomposed granite. C. Mix Design 1. Source, color and weight of aggregate. 2. Quantity of water for pre -wetting. 3. Quantity of resin emulsion. 4. Written certification from mix manufacturer that all deliveries of mix meet specification. D. Test Reports 1. Results from Marshall Stability Test. 2. Final compaction. CITY OF SAN MATEO Bayfront Levee Improvements Section 02725 Page 1 1 1 1 1 1 1 1 1 I 1 DECOMPOSED GRANITE SECTION 02725 1.04 DELIVERY, STORAGE, AND HANDLING A. Storage and Protection: Protect from segregation and excessive moisture during delivery, storage, and handling. 1.05 QUALITY ASSURANCE A. Contractor shall coordinate and schedule to review the installation requirements with the mix supplier. B. Contractor shall form and install an approximately 4 -foot square sample of DG duplicating a small section of actual work to be done. 1. If work is acceptable, sample may be part of the total production. 2. If work is not satisfactory, sample shall be removed at Contractor's expense and further samples installed until approved as satisfactory by the Engineer. PART 2 PRODUCTS 2.01 MATERIALS A. Aggregate Base Course shall meet the requirements of Section 02722. B. Aggregate for DG mix shall meet the following requirements: 1. Aggregate color shall be tan, similar to existing DG pavement on the existing levee near Ryder Park. 2. Resin emulsion shall be a totally natural additive emulsion with high solids content formulated especially for use as a natural flexible pavement binder. a. Resin -stabilized DG shall cure to a water insoluble, high strength state, equal in strength to hot -mix asphalt concrete. b. Resin emulsion shall dry without affecting the color of the aggregate. c. Resin emulsion shall be added at a rate of 10-12 percent during blending operations. d. Resin emulsion shall be non -hazardous, non-toxic, non -corrosive and water soluble. e. Resin emulsion, or equal: 1) ResinPave by Road Products Corporation; (800) 685-0539. 2) Resin Pavement by Soil Stabilization Products; (800) 523-9992. 3. Only fresh, clean and potable water shall be used in DG mixes. 4. Seal coat shall be resin emulsion. 5. Tack coat shall be resin emulsion diluted with potable water. 6. Aggregate for DG shall conform to the following gradation limits: CITY OF SAN MATEO Bayfront Levee Improvements Section 02725 Page 2 1 DECOMPOSED GRANITE SECTION 02725 1 1 1 1 1 1 1 1 1 1 Sieve Sizes (Square Openings) Percent by Weight Passing Sieve 3/8 inch 95-100 Number 4 85-100 Number 8 75-95 Number 30 35-55 Number 50 20-4 Number 200 Min 10-25 2.02 MIXES A. DG mix shall not contain less than 10-12 percent emulsion by dry weight of the aggregate. B. Installed DG mixture shall have a Marshall Stability Minimum no less than 4,000 pounds, tested in conformance with ASTM D1599. 2.03 EDGING A. Where other permanent improvements or pavement do not provide adequate edging, furnish aluminum edging, 3/16" x 5'/i' manufactured from 6063 extruded aluminum alloy of T-6 hardness with an interlock system and stake punch -outs fabricated in strip. B. Provide aluminum stakes that lock below the top edging. 2.04 WEED BARRIER FABRIC A. Underlay the DG pavement with weed barrier fabric. B. Fabric shall be spun or woven, non degrading geotextile fabric that blocks at least 95% of weed growth and is permeable to air, water, gases and fertilizer. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: Examine conditions upon which the work specified in this Section depends for defects that may influence installation and performance. B. Review subgrade and aggregate base to verify that they have been graded correctly and compacted as required for installation of DG. C. Do not proceed with installation until unsatisfactory conditions have been corrected. 1 CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 3 I I I I I I I I I I I I I I I I 1 1 1 1 A 1 1 1 1 DECOMPOSED GRANITE SECTION 02725 3.02 JOB CONDITIONS A. Aggregate base or sub -base shall be dry. B. Do not install DG mix or apply seal coat if rain is forecast within four days following installation. C. Protect newly installed pavement and seal coat from water until curing is complete. D. Install DG mix and seal coat when ambient temperatures are above 60° F and overnight temperatures are above 32° F. 3.03 LAYOUT A. Establish lines and levels using instrumentation and other appropriate means to establish finish grades for aggregate paving. B. Provide a sufficient quantity of grade stakes as required to provide aggregate paving with smooth finish grades and positive drainage. 3.04 SUBGRADE PREPARATION A. Prepare as specified in Section 02300, "Earthwork." B. Grade subgrade with uniform slope between points where elevations are given. C. Subgrade shall be crowned in the middle or have a two percent slope from one side to the other. D. Grade subgrade surface to within 0.05 foot of finish grade minus aggregate base and aggregate paving thicknesses. E. Fill and compact depressions and remove loose material to finish true to line and grade, presenting a smooth, compacted and unyielding surface. F. Remove debris, loose dirt and other extraneous materials. G. All water flow shall be directed off of and away from the pavement and base during construction. 3.05 AGGREGATE BASE COURSE A. Edging materials, whether in the form of other permanent improvements or edging as specified herein shall be in place prior to placing aggregate base or DG. The final compacted DG surface shall be no less than 1/8 -inch above the edging material to assure proper drainage. B. Place and compact aggregate base in conformance with Section 02722. Furnish compaction test results for acceptance by the Engineer prior to DG paving. C. Any damage to the aggregate base shall be repaired prior to DG paving. CITY OF SAN MATEO Bayfront Levee Improvements Section 02725 Page 4 = MI MN® M® N a®® M M M a 1 1 1 1 1 I 1 1 1 1 1 DECOMPOSED GRANITE SECTION 02725 3.06 INSTALLATION A. Install weed barrier fabric over aggregate base prior to installation of DG mix. B. Furnish, spread, and compact aggregate base course material to the lines, grades, and dimensions indicated on the Plans. Place mix using a single, continuous operation. 1. Use a self-propelled, mechanized spreading -and -finishing machine designed specifically for the placement of resin mix. a. Machine shall be equipped with a screen or strike -off assembly capable of accurate regulation and adjustment to a uniform depth. 2. Small amounts of material may be placed and raked by hand. C. Structural section shall be as detailed on the Plans. D. If slopes of surfaces to be paved exceed four percent, place material in an uphill direction. Do not allow equipment to run over uncompacted material. E. After mix placement, begin initial compaction as soon as the mix will bear roller weight without undue displacement. 1. If mix will not support compaction equipment due to excess moisture, delay initial compaction until mix achieves adequate stability to support equipment. 2. Non -heeled boots are required for anyone having to walk on resin DG during the installation process. 3. Initial breakdown compaction shall be performed with self-propelled one - ton steel drum rollers in static mode only. Vibratory plate compactors shall be used for edges and areas where a steel drum roller is not practical. 4. On steep grades (>4%) use static rollers, operate equipment at slow speeds, and with the drive wheel forward to the uphill direction of work progress. 5. If the pavement begins to develop stress cracks, further compaction shall be halted. 6. Test paving surfaces for slope and smoothness after initial rolling and correct deficiencies immediately so that finished surfaces will meet specified tolerances and requirements for smoothness. F. Begin final compaction as soon as possible after initial compaction is complete. 1. Eliminate roller marks from initial compaction and create an appealing pavement surface at the direction of the Engineer. 2. Contractor may use a one -ton steel drum roller or small plate compactor. 3. Do not over roll. CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 5 DECOMPOSED GRANITE SECTION 02725 1 1 I 1 1 1 1 3.07 SEAL COAT A. Preparation: 1. Apply seal coat to completed pavement surfaces no earlier than 3 days or later than 7 days following final compaction. 2. Surface must be swept thoroughly with hand brooms prior to application. 3. Protect pavement surfaces against tracked on dirt and mud until the seal coat application is complete. B. Application: 1. Apply each seal coat at a rate of 0.02 to 0.04 gallon of resin emulsion per square yard. 2. Dilute resin emulsion 4:1 with water prior to application. Test a small area to insure that a proper dilution rate is used. 3. Apply seal coat in a verifiable and reproducible manner, at a controlled rate and with uniform pressure throughout. 4. Make multiple passes as required to prevent runoff of resin emulsion. C. Allow seal coated surfaces to dry a minimum of 48 hours before allowing traffic on pavement. 3.08 TOLERANCES A. The in -place compacted thickness for aggregate paving surface course shall be as indicated on the Plans with a minimum tolerance of 3/16 -inch. Finished surface smoothness: 1. Subgrade - ± 0.08 foot. 2. Aggregate base course - maximum 3/8 -inch in 10 feet. 3. Aggregate paving surface course — maximum 3/16 -inch in 10 feet. 3.09 FIELD QUALITY CONTROL A. Density tests shall be performed within 48 hours after final compaction in conformance with ASTM D2950. B. Pavement surface shall not vary more than 3/16 inch per 10 feet, except at intersections or changes of grade. Areas not meeting this tolerance shall be corrected immediately after initial compaction. C. Areas not meeting the DG course thickness as shown on the Plans shall be corrected immediately after initial compaction. 3.10 REPLACEMENT OF DEFECTIVE PAVEMENT A. Replace full depth of paving thickness where paving mixes are contaminated or where pavement is defective. CITY OF SAN MATEO Bayfront Levee Improvements Section 02725 Page 6 DECOMPOSED GRANITE SECTION 02725 B. Cut edges of pavement to be removed so that sides are vertical and oriented perpendicular and parallel to the direction of traffic. Spray edges with a tack coat of resin emulsion. C. After applying tack coat, place pavement mix in areas where paving was removed in sufficient quantity to conform to elevation and tolerance requirements. 1 1 1 1 1 1 1 1 1 I 1 I D. Thoroughly compact DG mix so that the cured patch meets all requirements set forth in this specification. • E. Skin patching of an area that has been rolled is not permitted. 3.11 PROTECTION A. Protect pavement surfaces against equipment and traffic until pavement has cured sufficiently (a minimum of 72 hours) to support traffic without marring, rutting, tearing, distressing or damaging the pavement in any way. Utilize warning signs, barricades and protection fencing in conformance with these Specifications to protect pavement from traffic. B. All installed pavement must be protected by covering with plastic sheeting if unforeseen inclement weather occurs before curing is complete. C. Contractor is responsible for replacing damaged pavement at his own expense, if that damage was preventable. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02722 Page 7 I I I I I I I I I I I I I I I DECOMPOSED GRANITE SECTION 02725 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02725 Page 8 I 1 1 1 1 1 1 1 i 1 1 1 1 1 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 SECTION 02742 ASPHALTIC CONCRETE PAVING PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Asphaltic concrete pavement on prepared subgrade or aggregate base course or on existing pavement to lines, grades and compacted thickness as indicated on the Plans and as necessary to restore all existing asphaltic concrete pavement disturbed during the course of the Work. B. Related Sections: 1. Section 02300 - Earthwork. 2. Section 02722 - Aggregate Base Course. 1.02 REFERENCES A. State of California Department of Transportation Standard Specifications, latest edition (CALTRANS Standard Specifications). 1. Section 37 - Bituminous Seals. 2. Section 39 - Asphalt Concrete. 3. Section 92 - Asphalts. 4. Section 93 - Liquid Asphalts. 5. Section 94 - Asphaltic Emulsions. B. CALTRANS Standard Test Methods: 1. Calif Test 202 - Sieve Analysis of Fine and Coarse Aggregates. 2. Calif Test 304 - Preparation of Bituminous Mixtures for Testing. 3. Calif Test 362 - Determining Asphalt Content in Bituminous Mixtures by Vacuum Extraction. 4. Calif Test 375 - Determining the In -Place Density and Relative Compaction of AC Pavement. 5. Calif Test 379 - Determining Asphalt Content in Bituminous Mixtures (Troxler Nuclear Gage Model 3241). American Society for Testing and Materials (ASTM) Standards: 1. ASTM D1557 - Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort. 2. ASTM D1561 - Practice for Preparation of Bituminous Mixture Test Specimens by Means of California Kneading Compactor. 1.03 SYSTEM DESCRIPTION A. This Work shall consist of furnishing and mixing aggregate and asphalt binder at a central mixing plant, spreading and compaction of the mixtures as specified and as indicated on the Plans. City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 1 1 1 1 1 I 1 1 ASPHALTIC CONCRETE PAVING SECTION 02742 B. In general, asphalt concrete and asphalt concrete base shall conform to Section 39 "Asphalt Concrete" and all applicable referenced sections of the CALTRANS Standard Specifications. 1. Where conflicts exist, this specification shall govern. 1.04 DEFINITIONS A. "Asphalt Concrete" as used by CALTRANS shall be considered the "Surface Course," or the final lift of the pavement section. B. "Asphalt Concrete Base" as used by CALTRANS shall be the remaining portion of the asphalt pavement section excluding the final lift. C. "Asphalt Pavement" shall be the total pavement section of asphalt including Asphalt Concrete and Asphalt Concrete Base. 1.05 SUBMITTALS A. Proposed Mix Design and Gradation of Materials. B. Product data: 1. Asphalt. 2. Asphalt aggregate 3. Pavement reinforcing fabric. C. Quality Control Submittals: 1. Test Results. 2. Certificate of Compliance. 3. Certificate of Competence. D. Equipment List. 1.06 DELIVERY, STORAGE, AND HANDLING A. Asphalt Pavement Delivery: 1. Transport the mixture from the mixing plant to the point of use in vehicles having tight bodies previously cleaned of all foreign materials. 2. Treat bodies as necessary to prevent material from sticking to the bodies. 3. Cover each load with canvas or other suitable material of sufficient size and thickness to protect the asphalt mixture from the weather. 1.07 PROJECT CONDITIONS A. Environmental Requirements: 1. Asphalt Concrete: City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 2 1 1 1 1 I 1 1 1 1 1 ASPHALTIC CONCRETE PAVING SECTION 02742 a. Place asphalt concrete only when surface is dry, when atmospheric temperature in the shade is 40 degrees F and rising, or above 50 degrees F if falling. b. Do not place asphalt concrete when weather is foggy or rainy nor when base on which material is to be placed is in wet or frozen conditions or when, in the opinion of the Engineer, weather conditions will prevent proper handling, finishing, compaction of the mixtures. 2. Prime Coat: a. Do not apply prime coat when atmospheric temperature is below 60 degrees F. b. Apply prime coat only when base course is dry or contains moisture not in excess of that which will permit uniform distribution and desired penetration. PART 2 PRODUCTS 2.01 ASPHALT PAVEMENT MATERIALS A. Asphalts: 1. Asphalt Binder: Steam -refined paving asphalt, Grade AR -4000, conforming to Section 92-1.02 "Grades" of the CALTRANS Standard Specifications. 2. Prime Coat and Tack Coat: Grade SC -70, conforming to Section 93-1.01 of the CALTRANS Standard Specifications. 3. Fog Seal: Asphaltic Emulsion, Grade SS -1h, conforming to Section 94- 1.01 of the CALTRANS Standard Specifications. B. Asphalt Aggregate: 1. Aggregate for asphalt concrete shall conform to Section 39-2.02 of the CALTRANS Standard Specifications for Type B grading, 1/2 -inch maximum, medium. 2. Aggregate for asphalt concrete base shall conform to Section 39-2.02 of the CALTRANS Standard Specifications for Type B grading. C. Asphalt pavement shall be produced in a batch mixing plant, a continuous pugmill mixing plant, or drier -drum mixing plant. 1. Storage shall conform to section 39-3.01 and Section 39-3.05 of the CALTRANS Standard Specifications. 2. Drying shall conform to Section 39-3.02 of the CALTRANS Standard Specifications. 3. Proportioning shall conform to Section 39-3.03 of the CALTRANS Standard Specifications. 4. Mixing shall conform to Section 39-3.04 of the CALTRANS Standard Specifications. City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 3 I I I I I I I I I I I ASPHALTIC CONCRETE PAVING SECTION 02742 2.02 SLURRY SEAL 1 1 1 1 1 1 1 1 A. Slurry seal, Type II, shall be applied in conformance with the provisions in Section 37-2, and all applicable referenced sections of the CALTRANS Standard Specifications, at the following locations: 1. In all streets and private property easement in which excavation is performed by the Contractor, slurry seal shall be applied from gutter lip to gutter lip. The slurry seal shall extend 5 feet beyond any excavation in the direction parallel to the gutters. 2.03 AGGREGATE BASE COURSE A. Aggregate Base Course shall conform to Section 02722 "Aggregate Base Course". B. Aggregate Base Course shall be placed at the following locations: 1. All asphalt pavement. C. Compacted thickness of Aggregate Base Course shall be as indicated on the Plans. 2.04 EQUIPMENT A. Spreading and Compacting Equipment: 1. Spreading equipment shall conform to Section 39-5.01 and all applicable referenced sections, of the CALTRANS Standard Specifications. a. Only in areas inaccessible to the machine, by approval of the Engineer, will hand spreading be permitted. 2. Compaction equipment shall conform to Section 39-5.02 and all applicable referenced sections, of the CALTRANS Standard Specifications. 2.05 SOURCE QUALITY CONTROL A. The Engineer will perform sampling and tests of materials in accordance with California Test Method Number 304 and California Test Method Number 362 or 379, as applicable. Samples will be taken from materials as delivered to the site. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: Verify surfaces and site conditions are ready to receive work. If unsatisfactory conditions exist, do not commence installation until such conditions have been corrected. Beginning application means acceptance of existing conditions. City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 4 I I I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 ASPHALTIC CONCRETE PAVING SECTION 02742 3.02 PREPARATION A. Protection: 1. Protect concrete pavements and walks, curbs and bases, and other improvements adjacent to the operations with suitable materials. 2. Building and other surfaces shall be covered with paper or other protection, when required. 3. Contractor shall be responsible for any damage caused by Contractor's employees. All damage caused by the Contractor's operations shall be repaired to the satisfaction of the Engineer at no additional cost to City. B. Subgrade Preparation: 1. Immediately prior to applying prime coat or tack coat, or immediately prior to placing the asphalt pavement when prime coat or tack coat is not required, the subgrade to receive asphalt pavement shall conform to the compaction requirement and elevation tolerances specified for the material involved and shall be cleaned to remove any loose or extraneous material. 2. If the asphalt pavement is to be placed on an existing base or pavement which was not constructed as part of the contract, the Contractor shall clean the surface by sweeping, flushing or other means to remove all loose particles of paving, all dirt and all other extraneous material immediately before applying the prime coat or tack coat. If the asphalt pavement is to be placed against a vertical gutter face or other vertical surface, the • Contractor shall roughen and clean vertical surface as required for proper bonding of asphalt immediately before applying prime coat or tack coat. C. Removal and Preparation of Existing Pavement: 1. Cut existing asphalt pavement to be removed with wheel cutter or other device capable of making a neat, reasonably straight and smooth cut without damaging the adjacent pavement to remain. 2. Cut and trim existing pavement after placement of specified base course material and just prior to placement of new asphaltic concrete pavement. Trimmed edges shall be coated with prime or tack coat as specified immediately prior to installing new abutting asphalt pavement. 3. All removed aggregate base material and asphaltic concrete pavement and any excess new material shall be removed from the project site and legally disposed of by the Contractor. 3.03 PRIME COAT AND TACK COAT A. Prime Coat: 1. A prime coat of liquid asphalt shall be applied on all surfaces of base course material to be paved. 2. Prime coat shall be applied at a rate of 0.25 gallons per square yard, and shall conform to Section 93-1.03 of the CALTRANS Standard. City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 5 1 ASPHALTIC CONCRETE PAVING SECTION 02742 1 1 1 1 1 1 1 1 Specifications for the distributor application of the grade of liquid asphalt being used. B. Tack Coat: 1. A tack coat of asphaltic emulsion shall be applied to all vertical surfaces of existing pavement, curbs, gutters, and construction joints in the surfacing against which additional material is to be placed, or as otherwise specified herein. 2. Tack coat shall be applied in one application at a rate of 0.1 gallons per square yard of surface covered. 3.04 ASPHALT PAVEMENT A. Placing materials in a windrow, then picking it up and placing it in the asphalt paver with loading equipment will not be permitted. B. Unless lower temperatures are directed by the Engineer, asphalt concrete shall be spread, and the first coverage of initial or breakdown compaction shall be performed when the temperature of the mixture is not less than 250 degrees F, and all breakdown compaction shall be completed before the temperature of the mixture drops below 205 degrees F. C. Asphalt pavement shall be spread and compacted in the number of layers and of the thicknesses indicated in the following table: 1. A thickness tolerance of ±0.1 inches is allowed for asphalt concrete. 2. A total thickness tolerance of±0.2 inches is allowed for asphalt concrete base. 3. Permeable pavement shall be 2.5 inches thick. Total Thickness Indicated on Plansl'I Number of Lifts Top Layer Thickness Next Lower Layer Thickness All Other Lower Layer Thicknesses Min Max Min Max Min Max < 2% 1 ---- --- ---- ---- 3" 2 1'/4" 1%" 1'/<" 1%' ---- TA" - 4%" 2 1%" 2%" 1%" 3" ---- > 5" (2) 1%" 2'%" 1%" 3" 1'/" 4,%" (1) When pavement reinforcing fabric is shown to be placed between layers of asphalt pavement, the thickness of asphalt pavement above the pavement reinforcing fabric sha I be considered to be the "Total Thickness Indicated on the Plans" for the purpose of spreading and compacting the asphalt pavement above the pavement reinforcing fabric. (2) At least two layers shall be placed if the total thickness is less than 5". At least three layers shall be placed if the total thickness is more than 5", and less than 10%". At least four layers shall be placed if the total thickness is greater than 10%". City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 6 1 1 1 1 1 1 1 ASPHALTIC CONCRETE PAVING SECTION 02742 D. A layer shall not be placed over another layer which exceeds 3 inches in compacted thickness until the temperature of the layer which exceeds 3 inches in compacted thickness is less than 160 degrees F at mid depth. 1. If the temperature of any layer drops below 140 degrees F, or if directed by the Engineer, apply tack coat before placing next layer. E. Unless otherwise indicated on the Plans, asphalt mixtures shall not be handled, spread or windrowed in a manner that will stain the finished surface of any pavement or other improvements. F. The completed mixture shall be deposited on the prepared subgrade at a uniform quantity per linear foot, as necessary to provide the required compacted thickness without resorting to spotting, picking -up or otherwise shifting the mixture. G. Spreading: 1. All layers of asphalt pavement shall be spread with an asphalt paver and shall conform to Section 39-6.02 and all applicable referenced sections of the CALTRANS Standard Specifications. 2. At locations where the asphalt pavement is to placed over areas inaccessible to spreading and rolling equipment, all layers of asphalt pavement shall be distributed directly out of the back of the dump truck and spread by hand. a. Asphalt pavement spread by hand shall be compacted thoroughly to the required lines, grades and cross -sections by means of pneumatic tampers, or by other methods that will produce the same degree of compaction as pneumatic tampers. H. Compaction: 1. Compaction of asphalt pavement shall conform to Section 39-6.03 and all applicable referenced sections of the CALTRANS Standard Specifications. 2. Minimum required density for each layer of asphalt pavement shall be 95 percent of that obtained in the laboratory according to ASTM Test Method D-1561. 3. Vibratory compaction equipment shall not be used irrespective of the Standard Specifications. I. Segregation shall be avoided and the surfacing shall be free of pockets of coarse or fine material. Asphalt pavement containing hardened lumps shall not be used. 1. In areas inaccessible to paving and compacting equipment where spreading is done by hand, minimize the amount of segregation. J. Location of longitudinal joints in the top layer will be determined by the Engineer and shall not adversely affect the quality of the finished product. City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 7 1 1 1 1 1 1 1 1 1 1 ASPHALTIC CONCRETE PAVING SECTION 02742 K. At all locations, or as directed by the Engineer, the asphalt concrete shall be square and at least 1 inch thick when conforming to existing surfacing. Tapering or feathering is not allowed. 3.05 FIELD QUALITY CONTROL A. The Contractor shall control the quality of Work and shall provide adequate testing to assure compliance with these Specifications. 1. The type and size of the samples shall be suitable to determine conformance with stability, density, thickness and other specified requirements. Use an approved power saw or core drill for cutting samples. Furnish all tools, labor, and materials for cutting samples, testing, and replacing the pavement where samples were removed. Take a minimum of 1 sample for every 4000 square feet of asphalt pavement placed. B. All asphalt pavement shall match the grades indicated on the Plans and shall be completely free from unintended hollows and high spots. 1. After completion of paving work, all paving shall be flooded with water. Any ponding that results in standing water greater than 3/4 inches in depth shall be ringed with chalk. Such hollows shall be corrected by removing and replacing the asphalt concrete. The asphalt concrete patch shall be square and at least 1 inch thick when conforming to existing surfacing. Tapering or feathering is not allowed. C. Contractor shall perform in -place density and compaction tests of the completed pavement in accordance with California Test Method Number 375, to determine compliance with the specified requirements. Submit test results to Engineer for approval. D. Cracks, settling of surface, improper drainage, improper compaction, and sloppy connection to previously laid surfaces will be construed as improper workmanship and will not be accepted. 3.06 MAINTENANCE OF PAVEMENT A. Upon completion of final rolling, traffic shall not be permitted on the finished pavement for at least 6 hours, or until the asphalt pavement has cooled sufficiently to withstand traffic without being deformed. 3.07 WORKMANSHIP AND WARRANTY A. Contractor shall provide written warranty against defects in materials or workmanship for a period of not less than 1 year upon completion of Work. END OF SECTION City OF SAN MATEO Bayfront Levee Improvements Section 02742 Page 8 SECTION 02750 ELASTOMERIC CHECK VALVES 1 1 1 1 1 1 1 1 1 1 1 1 1 PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Slip-on "Duckbill" Elastomeric Check Valves. Related Sections: 1. Section 02318 — Trenching 2. Section 02700 — High Density Polyethylene Pipe and Fittings 1.02 SUBMITTALS A. Submit product literature that includes information on the performance and operation of the valve, materials of construction, dimensions and weights, elastomer characteristics, flow data, headloss data, and pressure ratings. 1. Manufacturer must have available flow test data from an accredited hydraulics laboratory to confirm pressure drop data. Company name, plant location, valve size and serial number shall be bonded to the check valve. B. Provide shop drawings that clearly identify the valve dimensions. C. Manufacturer's Published Installation Instructions. 1.03 QUALITY ASSURANCE A. Supplier shall have at least ten (10) years experience in the manufacture of "duckbill" style elastomeric valves, and shall provide references and a list of installations upon request. 1.04 DELIVERY, STORAGE, AND HANDLING A. Protect valve materials from sunlight, scoring, and distortion. Any elastomeric valve not having adequate ultraviolet inhibitor shall not be stored outside in direct sunlight. Any valve that has been cut, gouged, scored, or otherwise damaged before installation shall be repaired or replaced. B. Do not allow surface temperatures on valve and connection fittings to exceed 120 degrees Fahrenheit. C. Store and handle valve and appurtenances as recommended by manufacturer in published instructions. D. Handling: Lift, move, or lower valve and appurtenances only with wide fabric choker slings. Wire rope or chain shall not be used. Slings shall be of sufficient capacity for the load, and shall be inspected before use. Worn or defective equipment shall not be used. CITY OF SAN MATEO Bayfront Levee Improvements Section 02750 Page 1 1 1 1 1 1 1 t 1 1 1 ELASTOMERIC CHECK VALVES SECTION 02750 1.05 WARRANTY A. Provide manufacturer's standard warranty for materials and workmanship for a period of one year from the date of final acceptance. PART 2 PRODUCTS 2.01 MANUFACTURERS A. All valves shall be of the Series TF-1 as manufactured by Tideflex Technologies Inc. of Pittsburgh, PA 15205 or approved equal. 2.02 CHECK VALVE CONSTRUCTION A. Check Valves shall be all rubber of the flow operated check type with a flange connection. The Check Valve is designed to connect to a mating flange on the end of the HDPE outfall pipe with A316 stainless steel bolts, washers and nuts furnished by the manufacturer. The port area shall contour down to a duckbill, which shall allow passage of flow in one direction while preventing reverse flow. B. The valve shall be one piece rubber construction with nylon reinforcement. The duckbill shall be offset so that the bottom line of the valve is flat, keeping the invert of the pipe parallel with the invert of the valve. The top of the valve shall rise to form the duckbill shape. In sizes 20" and larger, the bill portion shall be thinner and more flexible than the valve body, and formed into a curve of 180°. 2.03 FUNCTION A. When line pressure inside the valve exceeds the backpressure outside the valve by a minimal amount, the line pressure forces the bills of the valve shall open, allowing flow to pass. B. When backpressure exceeds the line pressure by the same amount, the bills of the valve shall be forced closed. The flat bottom shall allow the valve to be installed where minimal bottom clearance exists. C. Valve shall prevent backflow with a maximum backpressure of four feet as measured at the pipe centerline PART 3 EXECUTION 3.01 INSTALLATION A. General: 1. Install check valves as specified herein and in accordance with manufacturer's published instructions. CITY OF SAN MATEO Bayfront Levee Improvements Section 02750 Page 2 I I I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 1 I 1 1 ELASTOMERIC CHECK VALVES SECTION 02750 B. Manufacturer's Service 1. Manufacturer's authorized representative shall be available for customer service during installation and start-up, and to train personnel in the operation, maintenance and troubleshooting of the valve. 2. Manufacturer shall also make customer service available directly from the factory in addition to authorized representatives for assistance during installation and start-up, and to train personnel in the operation, maintenance and troubleshooting of the valve. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02750 Page 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ELASTOMERIC CHECK VALVES SECTION 02750 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02750 Page 4 I 1 1 1 1 1 1 1 1 1 1 SECTION 02772 CONCRETE CURBS, GUTTERS, AND SIDEWALKS PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Concrete curbs, gutters, sidewalks, driveways, access ramps, and alley intersections to replace those demolished or damaged during construction. B. Related Sections: 1. Section 02722 - Aggregate Base Course. 2. Section 03150 - Concrete Accessories. 3. Section 03300 - Cast -In -Place Concrete. 1.02 SYSTEM DESCRIPTION A. Performance Requirements: Construct various types of concrete curb, gutter, sidewalk, driveways, and alley intersections to dimensions and details indicated on the City of San Mateo's Standard Plans. 1.03 SUBMITTALS A. Product Data: Submit data completely describing products when requested. B. Samples: Submit samples when requested. 1.04 PROJECT CONDITIONS A. Any concrete flatwork damaged during the course of construction, including transportation and delivery, shall be replaced to that flatwork's pre-existing condition or better. B. Contractor shall be responsible for all field measurements necessary to meet these specifications. 1.05 SEQUENCING AND SCHEDULING A. The repair of damaged concrete flatwork shall be coordinated with the Engineer. B. Concrete repair work shall be scheduled so as to prevent further damage to that repair work from further construction. C. Contractor shall repair damaged concrete as directed by the Engineer if the Engineer determines such repair is necessary for public safety. CITY OF SAN MATEO Bayfront Levee Improvements Section 02772 Page 1 1 1 1 1 1 1 1 1 1 1 1 1 CONCRETE CURBS, GUTTERS, AND SIDEWALKS SECTION 02772 PART 2 PRODUCTS 2.01 MATERIALS A. Concrete: Class A, conforming to the applicable requirements of Section 03300. B. Curb Finishing Mortar: 1 part portland cement to 2 parts sand. C. Form Release Material: Light oil or other releasing agent of concrete type that does not discolor concrete or interfere with the application of finishing mortar to curb tops and faces. D. Joint Materials: 1. Expansion: Comply with requirements as specified in Section 03150. 2. Construction: Steel dividers or plastic inserts. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: 1. Verify field conditions, including subgrade condition and interferences, before beginning construction. 3.02 PREPARATION A. Surface Preparation: 1. Subgrade: a. Construct and compact true to grades and as specified in Section 02300. b. Remove soft or unsuitable material to depth of not less than 6 inches below subgrade elevation and replace with satisfactory material. 2. Forms And Subgrade: Water immediately in advance of placing concrete. 3.03 INSTALLATION A. Special Techniques: 1. Contractor's Option: a. Construct concrete curbs and gutters by conventional use of forms, or by means of curb and gutter machine when acceptable to the Engineer. b. When use of machines designed specifically for work of this Section are accepted by the Engineer, results must be equal to or better than those produced by use of forms. CITY OF SAN MATEO Bayfront Levee Improvements Section 02772 Page 2 1 1 1 I 1 1 1 1 CONCRETE CURBS, GUTTERS, AND SIDEWALKS SECTION 02772 c. Applicable requirements of construction that apply to use of forms also apply to use of machines. d. Discontinue use of machines when results are not satisfactory to the Engineer. B. Forms: 1. Carefully set to line and grade and securely stake in position forms conforming to dimensions of items to be constructed. 2. Thoroughly clean prior to each use and coat with form releasing material. C. Expansion and Contraction Joints: 1. Expansion Joints: a. Construct vertically, and at right angles to centerline of street and match joints in adjacent pavement or sidewalks. b. Constructed at radius points, driveways, alley entrances, and at adjoining structures. c. Fill joints with expansion joint filler material. 2. Contraction Joints: a. Constructed not more than 15 feet apart. b. Make joints of construction joint material, scoring or saw cutting to depth of not less than 1-1/2 inches and matching joints in adjacent pavement or sidewalk. D. Concrete: 1. Placing: a. Thoroughly spade concrete away from forms so that no rock pockets exist next to forms and so that no coarse aggregate will show when forms are removed. 2. Compacting: a. Compact by mechanical vibrators accepted by the Engineer. b. Continue tamping or vibrating until mortar flushes to surface and coarse aggregate is below concrete surface. 3. Form Removal: a. Front Form Faces: Do not remove before concrete has taken initial set and has sufficient strength to carry its own weight. b. Gutter and Rear Forms: Do not remove until concrete has hardened sufficiently to prevent damage to edges. 4. Finishing and Curing: a. As soon as curb face forms are stripped, apply finishing mortar to the top and face of curb and trowel to a smooth, even finish. Finish with fine haired broom in direction of work. CITY OF SAN MATEO Bayfront Levee Improvements Section 02772 Page 3 1 1 1 I I 1 1 1 CONCRETE CURBS, GUTTERS, AND SIDEWALKS SECTION 02772 b. Where curb is installed without integral gutter, extend finish 2 inches below grade. c. Edge concrete at expansion joints to 1/4 -inch radius. d. Flow lines of gutters shall be troweled smooth 4 inches out from curb face for integral curb and gutter and 4 inches on both sides of flowline 4 gutters without curbs. E. Backfilling: 1. Unless otherwise specified, backfill behind curbs, gutters, or sidewalks with soil native to area. 3.04 FIELD QUALITY CONTROL A. Tests: 1. Curbs and Gutters: a. Test face, top, back, and flow line with 10 -foot straightedge or curve template longitudinally along surface. b. Correct deviations in excess of 1/4 inch. 2. Gutters: a. Frequency of Testing: When required by the Engineer, where gutters have slope of 0.8 foot per hundred feet or less, or where unusual or special conditions cast doubt on capability of gutters to drain. b. Test Method: Establish flow in length of gutter to be tested by supplying water from hydrant, tank truck, or other source. c. Required Results: 1) 1 hour after supply of water is shut off, inspect gutter for evidence of ponding or improper shape. 2) In event water is found ponded in gutter to depth greater than '/- inch or on adjacent asphalt pavement, correct defect or defects in manner acceptable to the Engineer without additional cost to the Contract. 3.05 ADJUSTING A. Repair portions of concrete damaged while stripping forms or, when damage is severe, replace such work at no additional cost to the Contract. Evidence of repairs shall not be noticeable in the finished product. B. Remove and replace sections of work deficient in depth or not conforming to requirements indicated herein at no additional cost to the Contract. Removal and replacement shall be the complete section between 2 joints. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02772 Page 4 1 1 1 1 I 1 1 1 1 SECTION 02830 CHAIN LINK FENCING PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. New chain link fencing and gates as shown on the plans and specified herein. 2. The replacement of existing chain link fencing and/or gates disturbed during construction to equal or better condition. 3. The intent of this specification is to provide for a complete installation in a workmanlike and professional manner. Not all required materials, installation procedures or hardware may be specifically listed. B. Related Sections: 1. Section 02200 - Site Preparation. 2. Section 02300 - Earthwork. 3. Section 03300 - Cast -In -Place Concrete. 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. A36 - Structural Steel. 2. A53 - Pipe, Steel, Black and Hot -Dipped, Zinc -Coated Welded and Seamless. 3. A123 - Zinc (Hot -Dipped Galvanized) Coatings on Iron and Steel Products. 4. A153 - Zinc Coating (Hot -Dip) on Iron and Steel Hardware. 5. A392 - Zinc -Coated Steel Chain -Link Fence Fabric 6. A817 - Metal -Coated Steel Wire for Chain -Link Fence Fabric and Marcelled Tension Wire. 7. F567 - Installation of Chain -Link Fence. 8. F626 - Fence Fittings. 9. F668 - Polyvinyl Chloride Coated Steel Chain -Link Fences. 10. F900 - Industrial and Commercial Swing Gates. 11. F1043 - Strength and Protective Coatings on Metal Industrial Chain -Link Fence Framework. 12. F1083 - Pipe, Steel, Hot -Dipped Zinc -Coated (Galvanized) Welded, for Fence Structures. B. State of California Department of Transportation (Caltrans). CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 1 I I I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 1 CHAIN LINK FENCING SECTION 02830 1.03 MANUFACTURER'S QUALIFICATIONS A. Fence, gates, and accessories shall be products of manufacturers' regularly engaged in manufacturing items of type specified. 1.04 SUBMITTALS A. Furnish the following information: 1. Manufacturer's Literature and Data for chain link fencing, gates and all accessories. 2. Manufacturer's Certificates for zinc coatings. B. Shop Drawings for swinging gates and fence terminations. PART 2 PRODUCTS 2.01 GENERAL A. Materials shall conform to ASTM F1083 and ASTM A392 for ferrous metals, zinc -coated; and detailed specifications forming the various parts thereto; and other requirements specified herein. Zinc -coat metal members (including fabric, gates, posts, rails, hardware and other ferrous metal items) after fabrication shall be reasonably free of excessive roughness, blisters and sal -ammoniac spots. 2.02 CHAIN LINK FABRIC A. ASTM A392 9 gauge wire woven in a 50 mm (2 inch) mesh. Top and bottom selvage shall have a knuckled finish. Zinc -coating weight shall be 570 grams/m2 (2.0 ounces per square foot). B. Woven wire and fabric fittings shall be coated with black polyvinyl chloride applied by the thermal extrusion process. C. Top and bottom tension wire shall be ASTM A817 and ASTM F626, having the same coatings as the fence fabric. 2.03 POSTS AND RAILS A. ASTM F1083, Grade SK -40A, round, zinc -coated steel. 1. Dimensions and weights of posts shall conform to the tables in the ASTM Specification. B. Provide post braces and truss rods for each gate, corner, pull or end post. 1. Provide truss rods with turnbuckles or other equivalent provisions for adjustment. 2. Fit with suitable expansion sleeves and means for securing rail to each gate, corner, and end posts. CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 2 CHAIN LINK FENCING SECTION 02830 1 1 1 I 1 1 1 1 1 1 1 C. Posts and rails shall be hot -dipped galvanized and covered with two coats of black metal paint applied over a metal primer. 2.04 ACCESSORIES A. Accessories as necessary shall include caps, rail and brace ends, wire ties or clips, braces and tension bands, tension bars, truss rods, and miscellaneous accessories conforming to ASTM F626. 2.05 GATES A. ASTM F900, type as shown on the plans. B. Gate framing, bracing, latches, hardware and coatings shall be the same as the fabric. C. Gate leaves more than 8 feet wide shall have either intermediate members and diagonal truss rods, or shall have tubular members as necessary to provide rigid construction, free from sag or twist. D. Attach gate fabric to the gate frame by a method standard with the manufacturer, except that welding will not be permitted. E. Arrange latches for padlocking so that padlock will be accessible from both sides of the gate regardless of the latching arrangement. 2.06 GATE HARDWARE A. Manufacturer's standard products, installed complete. The type of hinges shall allow gates to swing through 180 degrees, from closed to open position. Hang and secure gates in such a manner that, when locked, they cannot be lifted off hinges. B. Provide stops and keepers for all double gates. Latches shall have a plunger -bar arranged to engage the center stop. Arrange latches for locking. Center stops shall consist of a device arranged to be set in concrete and to engage a plunger bar. Keepers shall consist of a mechanical device for securing the free end of the gate when in full open position. C. Provide provision for locking gate with padlock and chain, provided by City. PART 3 EXECUTION 3.01 INSTALLATION A. Install fence with a properly trained crew; on previously prepared surfaces; to lines and grades as shown. B. Install fence in accordance with ASTM F567 and with the manufacturer's printed installation instructions, except as modified herein or as shown. CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 3 1 1 1 1 1 1 1 1 1 1 1 CHAIN LINK FENCING SECTION 02830 C. Posts and rails shall be hot -dipped galvanized and covered with two coats of black metal paint applied over a metal primer. 2.04 ACCESSORIES A. Accessories as necessary shall include caps, rail and brace ends, wire ties or clips, braces and tension bands, tension bars, truss rods, and miscellaneous accessories conforming to ASTM F626. 2.05 GATES A. ASTM F900, type as shown on the plans. B. Gate framing, bracing, latches, hardware and coatings shall be the same as the fabric. C. Gate leaves more than 8 feet wide shall have either intermediate members and diagonal truss rods, or shall have tubular members as necessary to provide rigid construction, free from sag or twist. D. Attach gate fabric to the gate frame by a method standard with the manufacturer, except that welding will not be permitted. E. Arrange latches for padlocking so that padlock will be accessible from both sides of the gate regardless of the latching arrangement. 2.06 GATE HARDWARE A. Manufacturer's standard products, installed complete. The type of hinges shall allow gates to swing through 180 degrees, from closed to open position. Hang and secure gates in such a manner that, when locked, they cannot be lifted off hinges. B. Provide stops and keepers for all double gates. Latches shall have a plunger -bar arranged to engage the center stop. Arrange latches for locking. Center stops shall consist of a device arranged to be set in concrete and to engage a plunger bar. Keepers shall consist of a mechanical device for securing the free end of the gate when in full open position. C. Provide provision for locking gate with padlock and chain, provided by City. PART 3 EXECUTION 3.01 INSTALLATION A. Install fence with a properly trained crew, on previously prepared surfaces, to lines and grades as shown. B. Install fence in accordance with ASTM F567 and with the manufacturer's printed installation instructions, except as modified herein or as shown. CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 3 1 1 1 1 I 1 1 1 1 1 1 CHAIN LINK FENCING SECTION 02830 C. Maintain all equipment, tools, and machinery while on the project in sufficient quantities and capacities for proper installation of posts, chain links and accessories. D. Supply accessories (posts braces, tension bands, tension bars, truss rods, and miscellaneous accessories), as required and recommended by the manufacturer, to accommodate the installation of a complete fence, with fabric that is taut and attached properly to posts, rails, and tension wire. 3.02 EXCAVATION A. Provide post holes to the depth and diameter shown on the manufacturer's printed installation instructions. B. Clear loose material from post holes. C. Grade area around finished concrete footings as shown on the grading plans and dispose of excess material in conformance with Section 02300. 3.03 POST SETTING A. Install posts plumb and in alignment. 1. Straight runs between braced posts shall not exceed 500 feet B. Where fence is not attached to a concrete wall, set posts in concrete footings of dimensions recommended by the manufacturer. 1. Thoroughly compact concrete so as it to be free of voids and finished in a slope or dome to divert water running down the post away from the footing. 2. Cure concrete a minimum of 72 hours before any further work is done on the posts. C. Fence posts anchored to a concrete wall shall be installed as shown on the Plans. D. Fit all exposed ends of post with caps. 1. Provide caps that fit snugly and are weathertight. 2. Where top rail is used, provide caps to accommodate the top rail. 3. Install post caps as recommended by the manufacturer. 3.04 TOP AND BOTTOM RAILS A. Install rails before installing chain link fabric. Provide suitable means for securing rail ends to terminal and intermediate post. B. Top rails shall pass through intermediate post supporting arms or caps. C. The rails shall have expansion couplings (rail sleeves) spaced as recommended by the manufacturer. CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 4 CHAIN LINK FENCING SECTION 02830 1 1 1 1 1 1 1. Where fence is located on top of a wall, install expansion couplings over expansion joints in wall. 3.05 FABRIC A. Install and pull taut tension wire before installing the chain -link fabric. B. Pull fabric taut and secured with wire ties or clips to the top rail, bottom rail and tension wire close to both sides of each post and at intervals of not more than 24 inches on center. 1. Secure fabric to posts using stretcher bars and ties or clips. 3.06 GATES A. Install gates plumb, level, and secure for full opening without interference. B. Set keepers, stops and other accessories into concrete as required by the manufacturer. C. Adjust hardware for smooth operation and lubricate where necessary. 3.07 REPAIR OF GALVANIZED SURFACES A. Use galvanized repair compound, stick form, or other method, where galvanized surfaces need field or shop repair. Repair surfaces in accordance with the manufacturer's printed directions. 3.08 FINAL CLEAN-UP A. Remove all debris, rubbish and excess material from the construction site. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 5 1 t 1 1 1 1 1 1 t 1 1 CHAIN LINK FENCING SECTION 02830 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02830 Page 6 1 1 1 1 1 1 1 1 1 SECTION 02925 TOPSOIL PREPARATION PART 1 GENERAL 1.01 SUMMARY A. Contractor shall furnish all labor, tools, equipment, products, material and transportation; and perform all operations necessary and incidental to properly execute and complete all work in accordance with the Drawings and these Specifications. B. Topsoil, for the purpose of this specification, constitutes the upper 1.5 vertical feet of soil at the design grade, after the completion of grading. C. The work includes: 1. Preparation of topsoil in graded areas to receive seeding. D. Related Sections: 1. Section 02200 - Site Preparation. 2. Section 02622 - Filter Fabric and Geotextiles. 3. Section 02300 - Earthwork. 4. Section 02955 - Seeding. E. Related Documents: 1. Review the Contract Documents for additional requirements and information that apply to work under this section. 1.02 INSPECTIONS A. Contractor shall coordinate with the Engineer a minimum of 5 working days prior to scheduled inspections, unless otherwise noted in these Specifications. B. Engineer has the right to sample soil at any point during topsoil preparation. C. The stages for inspection are expected to be: 1. Onsite meeting prior to Work in this Section 2. After finish grading in conformance with Section 02300. 3. Topsoil preparation of all seeding areas. 4. Acceptance of topsoil preparation is contingent upon Engineer's review of soil sample as described herein. D. The Contractor, at no additional cost, shall correct any deficiencies as identified or directed by the Engineer. CITY OF SAN MATEO Bayfront Levee Improvements Section 02925 Page 1 TOPSOIL PREPARATION SECTION 02925 t t 1 1 1 1 1 1 1.03 SUBMITTALS A. Contractor shall submit documentation of the soil laboratories' certifications and proposed detection limits for the contaminants specified herein to the Engineer for approval prior to conducting the analysis. B. Submit soil suitability test report (Section 3.02) at least 30 days prior to, but no more than 90 days prior to, the placement of topsoil from any source. PART 2 PRODUCTS Not Used PART 3 EXECUTION 3.01 INSPECTION OF SITE CONDITIONS A. Examine site for conditions that will adversely affect execution, permanence, and quality of work. B. Verify that rough grades and slopes of seeding areas are acceptable to Engineer prior to commencing work of this Section. 3.02 TOPSOIL TESTING A. Proposed topsoil for the constructed levee slopes (inboard and outboard) from whatever source (material obtained on -site or imported) at the Seal Slough and East End Levee sites. above mean higher high water (elevation 101.7 feet on the project datum) shall meet the following horticultural suitability criteria: Table 1. Topsoil Horticultural Suitability Criteria CONSTITUENT MINIMUM MAXIMUM clay (0 — 0.002 mm) 15 % 40 % silt (0.002 — 0.05 mm) 15 % 45 % silt and clay 30 % 60 % sand (0.05-2.0 mm) 10 % 50 % coarse sand (0.5-2.0 mm) 0% of total sand 20% of total sand gravel (2 — 12 mm) 0% 10% rock (up to 3 inch diameter) 0 % 10 % by volume I organic matter 3 % dry weight 5 % dry weight Salinity (ppt) 0 2 pH (saturated soil paste) 5.5 8.0 sodium adsorption ratio (SAR) 0 15.0 Ca:Mg 2:1 NA B (saturation extract concentration) 0 1.5 ppm CITY OF SAN MATEO Bayfront Levee Improvements Section 02925 Page 2 TOPSOIL PREPARATION SECTION 02925 1 1 1 1 1 1 1 1 1 B. Topsoil for the constructed outboard (bayward) levee slopes at the Seal Slough and East End Levee sites below mean higher high water (elevation 101:7 feet on the project datum) shall either be on -site soil obtained from below said elevation; or shall be imported soil meeting the criteria in Table 1 and the following contaminant suitability criteria consistent with the San Francisco Regional Water Quality Control Board's (RWQCB) screening criteria for wetland creation surface material: Table 2. RWQCB Contaminant Screening Criteria ANALYTE RWQCB SCREENING CRITERIA/CONCENTRATION FOR WETLAND SURFACE MATERIAL . METALS (mg/kg) Arsenic 15.3 Cadmium 0.33 Chromium 112.0 Copper 68.1 Lead 43.2 Mercury 0.43 Nickel 112.0 Selenium 0.64 Silver 0.58 Zinc 158.0 ORGANOCHLORINE PESTICIDES/PCBS (p g/kg) DDTS, sum 7.0 Chlordanes, sum 2.3 Dieldrin 0.72 Hexachlorocyclohexane 0.78 Hexachlorobenzene 0.485 PCBs, sum 22.7 POLYCYCLIC AROMATIC HYDROCARBONS (p g/kg) PAHs, total 3,390.0 Low molecular weight PAHs, sum 434.0 High molecular weight PAHs, sum 3,060.0 1 -Methyl naphthalene 12.1 1-Methylphenanthrene 31.7 2,3,5-Trimethylnaphthalene 9.8 2,6-Dimethylnaphthalene 12.1 2-Methylnaphthalene 19.4 Acenaphthene 26.0 Anthracene 88.0 Acenaphthylene 88.0 Benz(a)anthracene 412.0 Benzo(a)pyrene 371.0 Benzo(e)pyrene 294.0 Benzo(b)fluoranthene 371.0 Benzo(g,h,i)perylene 310.0 Benzo(k)fluoranthene 258.0 Biphenyl 12.9 Chrysene 289.0 Dibenz(a,h)anthracene 32.7 Fluoranthene 514.0 Fluorene 25.3 I ndeno(1,2,3-c, d)pyrene 382.0 Naphthalene 55.8 Perylene 145.0 Phenanthrene 237.0 Pyrene 665.0 CITY OF SAN MATEO Bayfront Levee Improvements Section 02925 Page 3 1 1 1 1 1 1 1 1 1 1 TOPSOIL PREPARATION SECTION 02925 C. The Contractor shall sample and test proposed topsoil for the analytes in Tables 1 and 2 as specified and required. Contractor shall provide data to the Engineer for approval of topsoil prior to the reuse, importation, or placement of topsoil on the constructed levees at the Seal Slough and East End Levee sites. Contractor shall sample and test soil as follows: 1. Collect composite soil samples from the topsoil proposed to construct the Seal Slough and East End Levee sites. A composite sample shall consist of 5 sub -samples taken from 5 different locations throughout the soil stockpile. Collect 1 composite sample for each proposed topsoil source. 2. Send composite topsoil samples to certified laboratories able to provide the aforementioned horticultural analyses for analytes in Table 1. The laboratory shall provide an analysis of macronutrient and micronutrient concentrations and recommendations for soil amendments, if needed, to meet the criteria in Table 1. 3. Contractor shall confirm with a certified laboratory that they can provide the required analysis within the detection limits outlined in Table 2 if imported topsoil is proposed below mean higher high water. 4. Provide the test results to the Engineer for approval of the topsoil source and proposed amendments. 3.03 TOPSOIL PREPARATION A. Topsoil shall be placed within 30 days of the completion of grading work at any Work Site. B. Contractor shall till topsoil to a depth of 8 inches to relieve over -compaction at the direction of the Engineer. C. Contractor shall apply soil amendments to site soil at the rates resulting from Section 3.02, Topsoil Testing. Amendments shall be applied to finish grades and incorporated by ripping/filling to a depth of 8 inches. D. Following incorporation of any required amendments, topsoil shall be lightly track -walked with equipment track marks oriented parallel to slope contours. 3.04 COMPLETION A. Upon completion of earthwork operations and topsoil prepration, clean areas within contract limits, remove tools, and equipment. Provide site clear, clean, free of debris, and suitable for re -vegetation operations. B. Contractor shall schedule a topsoil acceptance inspection with the Engineer to occur within 5 working days of the completion of work in this Section. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02925 Page 4 1 1 1 1 1 1 1 1 SECTION 02955 SEEDING PART 1 GENERAL 1.01 SUMMARY A. Contractor shall furnish all labor, tools, equipment, products, material and transportation; and perform all operations necessary and incidental to properly execute and complete all Work in accordance with the Drawings and these Specifications. B. The Work includes seeding and applying erosion control at the following locations: 1. San Mateo Creek Mouth 2. Detroit Drive 3. Seal Slough 4. East End Levee, inboard and outboard from the top of levee to each toe C. Related Section: 1. Section 02925: Topsoil Preparation. D. Related Documents: 1. Review the Contract Documents for additional requirements and information that apply to Work under this Section. 1.02 REFERENCES A. Reference Data: 1. If the year of the adoption or the latest revision is omitted from the designation, it shall mean the specification, manual, or test designation is in effect the date the Notice to Proceed with the Work is given. 1.03 QUALITY ASSURANCE A. Licensing requirements: Contractor shall possess a State of California Landscape Contractor's license (Class C-27) and an applicator's business license. 1.04 INSPECTIONS A. Contractor shall coordinate with the Engineer a minimum of 5 working days prior to scheduled inspections, unless otherwise noted in these Specifications. B. The stages for inspection are expected to be: 1. Onsite meeting prior to Work in this Section 2. Seeding (hydroseeding and/or broadcast seeding) CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 1 SEEDING SECTION 02955 1 1 1 1 1 1 1 3. Installation of erosion control 4. Acceptance of Work in this Section as described herein. C. The Contractor, at no additional cost, shall correct any deficiencies as identified or directed by the Engineer. 1.05 SUBMITTALS A. General Requirements: 1. Submit product information, material samples, lab test results, or other items identified, to Engineer for action. B. Material List: 1. Certification that the seed, wood fiber, tackifier, straw, and erosion control fabric meet this specification shall be provided to the Engineer prior to performing any Work. 2. The material list shall include a description of each item, the quantity of each item and the dealer source of each item. C. Record Drawings: During the course of the installation, carefully record all changes made and submit a plan showing all changes to Engineer within 10 days of completion. 1.06 PROJECT CONDITIONS A. Sequencing and scheduling: It is the responsibility of the Contractor to coordinate seeding with other phases of construction so as not to incur any scheduling or installation conflicts and to be efficient in the construction process. B. Environmental Conditions: All site work and landscape installation shall not be performed during wet, muddy or frozen conditions. C. Protection of Work: The Contractor shall provide adequate protection for all Work until completion and final acceptance. Contractor shall take particular precautions to protect: existing buildings, fencing, electroliers, overhead and underground utilities, and all existing trees to remain. Reference "Tree Protection Notes" on Drawings for tree protection information. All damaged, stained or disturbed items shall be replaced or repaired at the expense of the Contractor prior to final acceptance. D. Maintaining conditions at project site: 1. Keep project site reasonably free from accumulation of debris, topsoil, and other materials resulting from Work specified herein. 2. Remove topsoil, fertilizers, textural soil amendments, and soil mixes from walks and paving on a daily basis. 3. Sweep areas daily as necessary to maintain clean pavement. CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 2 SEEDING SECTION 02955 4. At completion of each area of Work, remove debris, equipment and surplus materials. 5. Maintain irrigation system at San Mateo Creek Floodwall site in working order to prevent desiccation of willows planted along the south side of fence. 6. Keep pedestrian and bike trail open for use as required in Section SP -7- 10.1: Traffic and Access. 1.07 PRODUCT DELIVERY, STORAGE AND HANDLING 1 1 1 1 A. Seed Material: 1. Protect seed material at all times during handling, shipping, and storage from extreme weather conditions, moisture, or other damage. 2. Seed material showing damage from shipping, while in storage or during seeding, may be rejected by the Engineer. Rejected seed material shall be replaced by the Contractor at his own expense. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Acceptable Manufacturers: 1. Manufacturers of setting materials are listed to set a standard for design and product performance. 2. Subject to the requirements, products of manufacturers not listed may be proposed for substitution, provided that they are equal in design, product performance and warranty to the products specified. 3. The burden of proof of equality of proposed products is on the Contractor. 2.02 MATERIALS A. Materials, parts, and equipment to be furnished by the Contractor shall be new, unless otherwise specified in these Specifications or noted on the Drawings. B. Reference standards: Comply with applicable provisions of the following: 1. Nomenclature: "The Jepson Manual: Higher Plants of California," 1993 edition or later; University of California Press, Berkeley, CA. C. Materials not meeting the requirements outlined in this Section shall, at the expense of the Contractor, be removed from the site and replaced. 2.03 ACCESSORIES A. Soil amendment (if deemed necessary by the Engineer): To match specification in Section 02925: Topsoil Preparation. CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 3 1 SEEDING SECTION 02955 1 1 1 1 1 1 1 1 1 1 1 B. Topsoil: As required to complete all Work to the proposed finish grade and match specification in Section 02925: Topsoil Preparation. C. Water shall be suitable for agricultural use and shall be free of harmful substances that would adversely affect plant growth or vigor. 2.04 BROADCAST SEED MATERIALS A. Seed: 1. Seed shall be a fresh, clean, new crop, and mixed by a dealer. Seed shall be packaged in dealer's unopened container with original label. Containers without a label or tag will not be accepted. 2, Commercially obtained seed shall be labeled under the California Food and Agricultural Code, and by the vendors supplying the seed. Seed shall have been tested for purity and germination not more than 15 months prior to the application of the seed. 3. Seed labels furnished by the seed vendors supplying the seed shall indicate the purity, germination, weed content, and inert material as determined by testing and shall be provided to the Engineer prior to applying the seed. The percent of weed seed shall not exceed 1.5 percent by weight of the total seed mixture. Seed treated with Mercury compounds shall not be used. 4. Contractor is responsible for coordinating with seed suppliers within 60 days of Notice to Proceed to ensure that all required seed species are available for installation. The seed mix may be adjusted depending on the commercial availability and seed collection locations for each species. Any adjustments must meet the approval of the Engineer prior to application. Seed is available from Pacific Coast Seed [(925) 373-4417, contact: David Gilpin]. 5. Seed shall originate from collection sites within Counties adjacent to the San Francisco Bay. Seed originating from other counties shall not be utilized without prior approval from the Engineer. 6. Contractor shall be required to procure seed mix of the species and proportions presented in the table below. Seed Mix Scientific Name Common Name Pounds of Pure Live Seed/Acre Achillea millefolium common yarrow 1 Atriplex lentiformis big saltbush 4 Bromus carinatus California brome 10 Elymus glaucus blue wild rye 8 CITY OF SAN MATEO Bayfront Levee Improvements 1 Section 02955 Page 4 SEEDING SECTION 02955 1 1 I 1 1 1 1 1 1 1 1 1 1 Scientific Name Common Name Pounds of Pure Live Seed/Acre Eschscholzia californica California poppy 2 Festuca rubra red fescue 5 Grindelia stricta marsh gumplant 1 Hordeum brachyantherum var. Salt meadow barley 10 Lupinus succulentus arroyo lupine 5 Vulpia microstachys three-week fescue 4 2.05 HYDROSEEDING MATERIALS A. Seed per Section "Broadcast Seed Materials." B. Slurry Mix. The hydroseed slurry mix shall consist of the following materials: 1. Wood Fiber: Contractor shall be required to procure wood fiber as described below. a. Wood fiber shall be derived from wood chips or similar wood material that is untreated, chemical free, and also free of paints or other finishes, or any other harmful substances that will inhibit plant growth. b. Wood fiber shall not originate from a Sudden Oak Death host species derived from a quarantined county. c. Fiber shall disperse into a uniform slurry when mixed with water. d. Fiber shall be colored to contrast with the area on which the fiber is applied and shall not stain rock surfaces. 2. Non -asphaltic tackifier: a. Tackifier shall be non-toxic to plants and wildlife and non -staining to rock surfaces. Tackifier shall be in powder form, may be re - emulsifiable, and shall be a processed organic adhesive derivative of Plantago insularis used as a soil binder, manufactured to be suitable for hydroseed applications. 2.06 EROSION CONTROL FABRIC A. Erosion control fabric shall be a layer of 100% coconut fiber stitched with biodegradable thread between biodegradable natural fiber top and bottom nets, such as C125BN available from North American Green (1-800-772-2040). B. Erosion control fabric staples shall be made of 8 -inch long, 11-guage (minimum) steel wire staples. CITY OF SAN MATEO Bayfront Levee Improvements 1 Section 02955 Page 5 SEEDING SECTION 02955 1 1 1 1 1 1 1 1 1 2.07 STRAW A. Prior to delivery of straw to the project site, the Contractor shall provide the name, address, and telephone number of the grower to the Engineer. B. Straw shall be either rice or derived from irrigated cropland. A minimum of 60% of the straw pieces shall be six inches long or longer. Straw shall not contain glass, plastic, metal, rocks, or other inorganic material. Straw shall not have been previously used for any other use. 2.08 SUBSTITUTIONS A. In the event that the specified seed mix is limited by availability or lacking in quality the Engineer reserves the right to substitute different species for those specified, as long as the substituted materials are at no additional cost to the City. B. Any substitutions desired by the Contractor must meet the approval of the Engineer prior to delivery and start of Work with such materials. PART 3 EXECUTION 3.01 SEEDING METHOD, TIMING, ACCESS, AND PREPARATION A. Contractor shall apply seed via broadcast seeding or hydroseeding. The seeding method will be at the discretion of the Contractor, unless otherwise directed by the Engineer. B. Timing: 1. Seeding timing should be coordinated to occur after grading and other disruptive construction activities are completed. 2. Seeding shall not occur prior to approval of work in Section. 02925: Topsoil Preparation. 3. Seed shall be applied within 10 working days of the completion of earthwork, weather permitting. A delay in the application of seed must be approved by the Engineer. 4. Seeding shall occur when site is not inundated with water. 5. Seeding shall occur prior to installation of erosion control fabric. C. Site Access: 1. The Contractor shall perform Work from and keep all equipment within the designated areas approved for construction access. 2. If hydroseed equipment will limit road or trail access, Contractor shall obtain any necessary approvals from City or County authorities for altering traffic flows. CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 6 1 SEEDING SECTION 02955 1 1 1 1 1 I 1 1 1 D. Preparation: 1. The Contractor shall keep seed in a cool, shaded place until utilized. 2. The Contractor should request seed delivery within the week prior to application. The seed shall be delivered to the project site in unopened containers with the seed tag attached. Containers without a seed tag attached will not be accepted. 3. Seeding areas shall be cleared of substantial debris and any other impediments to seed -soil contact. Scarify areas to be seeded to eliminate glazed surfaces, if present. 3.02 BROADCAST SEEDING A. The broadcast seed mix shall be applied to the project locations described herein and where the soil surface is disturbed by construction at the direction of the Engineer. All broadcast seed areas shall be confirmed with the Engineer prior to seeding. 1. A "belly grinder" manual type seeder shall be used to broadcast seed. 2. Broadcast seed evenly at the rate specified. 3. Rake seed bed lightly to cover seed with 1/8 -inch to 1/4 -inch layer of soil. Seed cover shall not exceed 1/4 inch. 3.03 HYDROSEEDING A. Hydroseed Application Procedure: The hydroseed seed mix shall be applied to the project locations described herein and where the soil surface is disturbed by construction at the direction of the Engineer. All hydroseed areas shall be confirmed with the Engineer prior to seeding. 1. The Contractor shall plan the layout of slurry hose to reduce potential damage to existing vegetation on and off the site. Due diligence shall be practiced to preserve the newly hydroseeded areas. Areas furthest from the pump vehicle shall be hydroseeded first and areas nearest to the vehicle, last. The slurry hose shall be retracted accordingly to minimize trampling and disturbance of newly hydroseeded areas. 2. The slurry shall be prepared, at the project site, as follows: a. Thoroughly mix water, wood fiber, and tackifier. b. Add seed immediately before seeding. Slurry shall be completely homogeneous. Mix Component Rate (pounds/acre) Water In sufficient quantities to apply seed at specified rates Wood fiber 1500 Tackifier 100 Seed At rates described in these Specifications 1 CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 7 1 1 1 1 1 1 1 1 1 1 SEEDING SECTION 02955 3. The slurry shall be applied as follows: a. Slurry shall be applied with a commercial hydroseeder having a built- in agitation system with capacity to continuously agitate, suspend, and homogeneously mix slurry. b. Slurry shall be sprayed with a sweeping motion to produce a uniform mat at the required seeding rate. 4. Areas disturbed by subsequent activities under this Work shall be decompacted and re-hydrqseeded at the Contractor's expense. Soils in these areas shall be decompacted to less than 90% relative compaction and the hydroseed mix shall be re -applied, as described in these Specifications. At the Engineer's discretion, small areas of disturbance may be re -seeded by hand broadcasting and followed by manually raking. 5. No individual seeded areas shall have bare spots or unacceptable cover totaling more than two percent of the individual areas. 3.04 EROSION CONTROL A. Immediately following hydroseeding or broadcast seeding, the Contractor shall install erosion control measures. B. Erosion Control Fabric: 1. The Contractor shall install erosion control fabric on the constructed levee slopes at Seal Slough and East End Levee. Erosion control fabric shall be installed according to manufacturer's recommendations and per these specifications: a. Contractor shall avoid unnecessary foot traffic across fabric. b. Roll erosion control fabric down slopes from the top of the grading envelope perpendicular to contours. c. Overlap edges a minimum of 6 inches. d. Lap upper edges over lower edges. e. Check slots: Place ends at top and bottom of slope in 6 -inch deep key trench, firmly backfilled. f. Staple ends 6 inches on center; side edges and center of each roll 2 feet on center. C. Straw: 1. In areas not receiving erosion control fabric, the Contractor shall apply straw as follows: a. Straw shall be applied using a mechanical blower or by hand labor at a rate of 2,000 lbs/acre. b. Application shall start on the windward side of the target area. Straw shall be applied to cover areas of similar slope uniformly. c. Straw shall not be applied in areas subject to frequent flooding. CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 8 SEEDING SECTION 02955 1 1 1 1 1 1 1 1 1 1 1 1 1 1 d. Immediately following straw application, straw shall be secured in place with non -asphaltic tackifier (applied at a rate of 120 Ibs/acre) or by crimping in with shovel. 3.05 CLEAN-UP A. Keep project sites reasonably free from accumulation of debris resulting from Work specified under this Section. Broom clean pavement daily. Remove dirt and overspray from building walls, pavement, and curbs immediately. B. At completion of seeding, remove all debris, equipment, and surplus materials; thoroughly clean adjacent pavement, curbs, walls, walks, etc. 3.06 PROTECTION A. Contractor shall protect the seeded areas throughout the duration of the Work described in these Specifications. 3.07 FINAL ACCEPTANCE A. Contractor shall schedule an acceptance inspection with the Engineer to occur within 5 working days of the completion of Work in this Section. B. Before requesting the acceptance inspection, Contractor shall submit the following to the Engineer: 1. Supplier invoices and delivery slips for all materials installed. 2. Documentation of conditions that may impede seed germination and growth. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 9 I I I I I I I I I I I I I SEEDING SECTION 02955 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 02955 Page 10 I 1 1 1 1 1 1 1 1 1 1 1 1 SECTION 02990 PAVEMENT RESTORATION AND REHABILITATION PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Resurfacing roads and paved surfaces in which surface is removed or damaged by installation of new work. B. Related Sections: 1. Section 02722 - Aggregate Base Course. 2. Section 02742 - Asphaltic Concrete Paving. 3. Section 03300 - Cast -in -place Concrete. 1.02 SYSTEM DESCRIPTION A. Performance Requirements: 1. Limiting Dimensions: a. Determine the exact lengths and dimensions of such roads, pavements, parking areas, and walks that will require removal and replacement for new work. b. Join existing surfaces to terminals of new surfacing in smooth juncture. PART 2 PRODUCTS 2.01 MATERIALS A. Aggregate Base Course: As specified in Section 02722. B. Asphalt Pavement: As specified in Section 02742. C. Portland Cement Concrete Replacement Material: Class A concrete as specified in Section 03300. 2.02 EQUIPMENT A. Roads, Pavements, Parking Areas, and Walks: 1. Equipment Requirements: Good condition, capable of performing work intended in satisfactory manner. City OF SAN MATEO Bayfront Levee Improvements Section 02990 Page 1 PAVEMENT RESTORATION AND REHABILITATION SECTION 02990 2.03 ACCESSORIES A. Material for Painting Asphalt Concrete Pavement: Tack coat as specified in Section 02742. t 1 1 1 1 1 1 1 PART 3 EXECUTION 3.01 INSTALLATION A. Aggregate Surface Removal Replacement: 1. When trench cut is in aggregate surfaced areas, replace aggregate base course material with material matching existing material compacted to 95 percent of its maximum density. Depth of aggregate base course shall match depth of existing aggregate base course or shall be a minimum of 6 inches, whichever is greater, unless otherwise indicated on the Plans. B. Pavement Removal and Temporary Asphalt Replacement: 1. Install temporary asphalt pavement or first course of permanent pavement replacement immediately following backfilling and compaction of trenches that have been cut through existing pavement. 2. Except as otherwise provided, maintain this temporary pavement in a safe and reasonably smooth condition until required permanent pavement is installed. 3. Remove and dispose of temporary paving from project site. 4. Where longitudinal trench is partly in pavement, replace pavement to original pavement edge, on a straight line, parallel to centerline of roadway. 5. Where no part of longitudinal trench is in pavement, surfacing replacement shall only be required where existing surfacing materials have been removed. C. Asphalt Pavement Replacement: 1. Replace asphalt pavement to same thickness as adjacent pavement and match as nearly as possible adjacent pavement in texture, unless otherwise indicated on the Plans. 2. Cut existing asphalt pavements to be removed for trenches or other underground construction by wheel cutter, clay spade, or other device capable of making neat, reasonably straight, and smooth cut without damaging adjacent pavement. Cutting device operation shall be subject to acceptance of Engineer. 3. Cut and trim existing pavement after placement of required aggregate base course and just prior to placement of asphalt concrete for pavement replacement, and paint trimmed edges with material for painting asphalt concrete pavement immediately prior to constructing new abutting asphalt pavements. No extra payment will be made for these items, and all costs incurred in performing this work shall be incidental to pipe laying or pavement replacement. City OF SAN MATEO Bayfront Levee Improvements Section 02990 Page 2 PAVEMENT RESTORATION AND REHABILITATION SECTION 02990 1 1 1 1 1 1 1 1 4. Depth of aggregate base course shall match depth of existing aggregate base course or shall be a minimum of 6 inches, whichever is greater, unless otherwise indicated on the Plans. 5. Conform replacement of asphalt pavement to contour of original pavement. D. Portland Cement Concrete Pavement Replacement: 1. Where trenches lie within Portland cement concrete section of streets, alleys, sidewalks, and similar concrete construction, saw cut such concrete (to a depth of not less than 1-1/2 inches) to neat, vertical, true lines in such manner adjoining surfaces are not damaged. 2. Place portland cement concrete replacement material to dimension as indicated on the Plans. 3. Provide expansion joints that match existing. 4. Before placing replacement concrete, thoroughly clean edges of existing pavement and wash with neat cement and water. 5. Surface Finish: Wood float finish. E. Curb, Gutter, and Sidewalk Replacement: 1. Where any concrete curb, gutter, or sidewalk has been removed or displaced, replace to nearest construction joints with new Class A curb, gutter, or sidewalk to same dimensions and finish as original construction that was removed. a. Provide expansion joints of same spacing and thickness as original construction. F. Pavement Matching: 1. Trim existing asphalt pavements which are to be matched by pavement widening or pavement extension to neat true line with straight vertical edges free from irregularities with saw specifically designed for this purpose. Minimum allowable depth of cut shall be 1-1/2 inches. 2. Cut and trim existing pavement after placement of required aggregate base course and just prior to placement of asphalt concrete for pavement widening or extension, and paint trimmed edges with material for painting asphalt concrete pavement immediately prior to constructing new abutting asphalt concrete pavements. No extra payment will be made for these items and all costs incurred in performing this work shall be incidental to widening or pavement extension. 3.02 FIELD QUALITY CONTROL A. Tests: 1. Asphalt concrete as specified in Section 02742. 2. Concrete as specified in Section 03300. City OF SAN MATEO Bayfront Levee Improvements Section 02990 Page 3 1 1 1 1 1 1 1 1 1 i 1 1 1 1 1 1 1 1 1 PAVEMENT RESTORATION AND REHABILITATION SECTION 02990 B. Inspection: 1. Asphalt Concrete: a. Lay 10 -foot straightedge parallel to centerline of trench when the trenches run parallel to street and across pavement replacement when trench crosses street at angle. b. Remove and correct any deviation in cut pavement replacement greater than 1/4 inch in 10 feet. 2. Portland Cement Concrete Replacement Pavement: a. Lay 10 foot straightedge either across pavement replacement or longitudinal with centerline of gutter or ditch. b. Remove and correct any deviation in cut pavement replacement greater than 1/4 inch in 10 feet. END OF SECTION City OF SAN MATEO Bayfront Levee Improvements Section 02990 Page 4 I I 1 1 1 1 1 1 1 1 1 1 SECTION 03071 EPDXIES PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Epoxy. 2. Epoxy gel. 3. Epoxy bonding agent. 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. D 638 - Test Method for Tensile Properties of Plastics. 2. D 695 - Test Method for Compressive Properties of Rigid Plastics. 3. D 790 - Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. 1.03 . SYSTEM DESCRIPTION A. Performance Requirements: 1. Provide epoxy materials that are new and use them within shelf life limitations set forth by manufacturer. 2. Perform and conduct work of this Section in neat orderly manner. 1.04 SUBMITTALS A. Product Data: Submit manufacturer's data completely describing epoxy materials. B. Quality Control Submittals: 1. Manufacturer's installation instructions. PART 2 PRODUCTS 2.01 MATERIALS A. Epoxy: Water -insensitive two-part type low viscosity epoxy adhesive material containing 100 percent solids and meeting or exceeding following characteristics when tested in accordance with standards specified: Manufacturers: One of the following or equal: 1. Master Builders, Inc., Concressive Standard LVI. CITY OF SAN MATEO Bayfront Levee Improvements Section 03071 Page 1 EPDXIES SECTION 03071 2. Sika Chemical Corp., Sikadur 35 Hi -Mod LV. 1 1 1 1 1 1 Physical Characteristic Test Method Required Results Tensile Strength ASTM D 638 8,000 pounds per square inch at 14 days and 77 degrees Fahrenheit cure. Flexure Strength ASTM D 790 11,000 pounds per square inch at 14 days and 77 degrees Fahrenheit cure. Compressive Strength ASTM D 695 16,000 pounds per square inch at 24 hours and 77 degrees Fahrenheit cure. Bond Strength --- Concrete shall fail before failure of epoxy. Gel Time In 5 -Mil Film Four hours maximum at 77 degrees Fahrenheit. Elongation ASTM D 638 1 percent minimum at 14 days and 77 degrees Fahrenheit. B. Epoxy Gel: Manufacturers: One of the following or equal: 1. Sika Chemical Corp.'s, Sikadur 31, Hi -Mod Gel. C. Epoxy Bonding Agent: Manufacturers: One of the following or equal: 1. Master Builders, Inc., Concressive 1001 Liquid LPL. 2. Sika Chemical Corp.'s, Sikadur 32, Hi -Mod. PART 3 EXECUTION 3.01 INSTALLATION A. Install and cure epoxy materials in accordance with manufacturer's installation instructions. B. Epoxy: 1. Apply in accordance with manufacturer's installation instructions. C. Epoxy Gel: 1. Apply in accordance with manufacturer's installation instructions. 2. Use for vertical or overhead work, or where high viscosity epoxy is required. 3. Epoxy gel used for vertical or overhead work may be used for horizontal work. CITY OF SAN MATEO Bayfront Levee Improvements Section 03071 Page 2 1 1 1 1 1 1 1 1 1 1 EPDXIES SECTION 03071 D. Epoxy Bonding Agent: 1. Apply in accordance with manufacturer's installation instructions; 2. Bonding agent will not be required for filling form tie holes or for normal finishing and patching of similar sized small defects. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 03071 Page 3 EPDXIES SECTION 03071 1 1 1 1 1 1 1 1 1 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 03071 Page 4 1 1 1 1 1 1 1 1 1 1 1 SECTION 03072 EPDXY RESIN/PORTLAND CEMENT BONDING AGENT PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Epoxy resin/Portland cement bonding agent. 1.02 REFERENCES A. American Society for Testing of Materials (ASTM): 1. C 109 - Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2 inch Cube Specimens). 2. C 348 - Test Method for Flexural Strength of Hydraulic Cement Mortars. 3. C 496 - Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens. 4. C 882 - Test Method for Bond Strength of Epoxy -Resin Systems Used with Concrete Slant Shear. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Sika Corporation, Lyndhurst, New Jersey, Sika Armatec 110. B. Substitutions: The use of other than the specified product will be considered providing the Contractor requests its use in writing to the Engineer. This request shall be accompanied by: 1. A certificate of compliance from an approved independent testing laboratory that the proposed substitute product meets or exceeds specified performance criteria, tested in accordance with the specified test standards. 2. Documented proof that the proposed substitute product has a one year proved record of performance of bonding Portland cement mortar/concrete to hardened Portland cement mortar/concrete, confirmed by actual field tests and five successful installations that the Engineer can investigate. 2.02 PERFORMANCE CRITERIA A. Properties of the Mixed Epoxy Resin/Portland Cement Adhesive: 1. Pot life: 75-105 minutes. 2. Contact time: 24 hours. 3. Color: Dark gray. City OF SAN MATEO Bayfront Levee Improvements Section 03072 Page 1 EPDXY RESIN/PORTLAND CEMENT BONDING AGENT SECTION 03072 1 1 1 1 I 1 1 1 B. Properties of the Cured Epoxy Resin/Portland Cement Adhesive: 1. Compressive strength in accordance with ASTM C 109. a. 1 day: 810 pounds per square inch minimum. b. 7 day: 6,000 pounds per square inch minimum. c. 28 day: 8,000 pounds per square inch minimum. 2. Splitting tensile strength in accordance with ASTM C 496. a. 28 days: 540 pounds per square inch minimum. 3. Flexural Strength: a. 1,100 pounds per square inch minimum in accordance with ASTM C 348. 4. Bond strength in accordance with ASTM C 882 modified at 14 days. a. 0 Hours Open Time: 1,900 pounds per square inch minimum. b. 24 Hours Open Time: 1,500 pounds per square inch minimum. 5. The epoxy resin/Portland cement adhesive shall not produce a vapor barrier. 6. Material must be proven to prevent corrosion of reinforcing steel when tested under the procedures as set forth by the Federal Highway Administration Program Report Number FHWA/RD86/193. Proof shall be in the form of an independent testing laboratory corrosion report showing prevention of corrosion of the reinforcing steel. 2.03 MATERIALS A. Epoxy Resin/Portland Cement Adhesive: 1. Component "A" shall be an epoxy resin/water emulsion containing suitable viscosity control agents. It shall not contain butyl glycidyl ether. 2. Component "B" shall be primarily a water solution of a polyamine. 3. Component "C" shall be a blend of selected Portland cements and sands. 4. The material shall not contain asbestos. PART 3 EXECUTION 3.01 MIXING AND APPLICATION A. Mixing the Epoxy Resin: Shake contents of Components "A" and Component "B". Empty all of both components into a clean, dry mixing pail. Mix thoroughly for 30 seconds with a jiffy paddle on a low -speed with 400 to 600 revolutions per minute drill. Slowly add the entire contents of Component "C" while continuing to mix for 3 minutes until uniform with no lumps. Mix only that quantity that can be applied within its pot life. City OF SAN MATEO Bayfront Levee Improvements Section 03072 Page 2 EPDXY RESIN/PORTLAND CEMENT BONDING AGENT SECTION 03072 1 I 1 1 1 1 1 1 1 1 B. Placement Procedure: 1. Apply to prepared surface with stiff -bristle brush, broom, or "hopper type" spray equipment. a. For Hand Applications: Place fresh, plastic concrete/mortar while the bonding bridge adhesive is wet or dry, up to 24 hours. b. For Machine Applications: Allow the bonding bridge adhesive to dry for 12 hours minimum. C. Adhere to all limitations and cautions for the epoxy resin/Portland cement adhesive in the manufacturer's current printed literature. 3.02 CLEANING A. Leave finished work and work area in a neat, clean condition without evidence of spillovers onto adjacent areas. END OF SECTION City OF SAN MATEO Bayfront Levee Improvements Section 03072 Page 3 I I I I I I I I I I I I I I I I EPDXY RESIN/PORTLAND CEMENT BONDING AGENT SECTION 03072 THIS PAGE INTENTIONALLY LEFT BLANK City OF SAN MATEO Bayfront Levee Improvements Section 03072 Page 4 1 1 1 1 1 1 1 1 SECTION 03102 CONCRETE FORMWORK PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Concrete formwork. B. Related Sections: 1. Section 03300 - Cast -in -place Concrete. 2. Section 03600 - Grouts. 1.02 REFERENCES A. American Concrete Institute (ACI): 1. 117 - Standard Specifications for Tolerances for Concrete Construction and Materials. 2. 347 — Recommended Practice for Concrete Form Work. 1.03 SYSTEM DESCRIPTION A. Design Requirements: 1. Design of concrete forms, falsework, and shoring in accordance with local, state, and federal regulations. 2. Design forms and ties to withstand concrete pressures without bulging, spreading, or lifting of forms. B. Performance Requirements: 1. Construct forms so that finished concrete conforms to shapes, lines, grades, and dimensions indicated on the Plans. 2. It is intended that surface of concrete after stripping presents smooth, hard, and dense finish that requires minimum amount of finishing. 3. Provide sufficient number of forms so that the work may be performed rapidly and present uniform appearance in form patterns and finish. 4. Use forms that are clean and free from dirt, debris, concrete, and similar type items. Coat with acceptable form release oil if required, prior to use or reuse. 1.04 SUBMITTALS A. Information on the Contractor's Proposed Forming System: Submit in such detail as the Engineer may require to assure himself that intent of the Specifications can be complied with by use of proposed system. CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 1 1 1 1 1 1 1 1 1 1 CONCRETE FORMWORK SECTION 03102 B. Alternate Combinations of Plywood Thickness and Stud Spacing: May be submitted. 1.05 QUALITY ASSURANCE A. Qualifications of Formwork Manufacturers: Use only forming systems manufactured by manufacturers having minimum 5 years experience, except as otherwise specified, or accepted in writing by the Engineer. B. Regulatory Requirements: Install work of this Section in accordance with local, state, and federal regulations. 1.06 PROJECT CONDITIONS A. Requirements Due to Weather Condition: Do not remove forms from concrete which has been placed when outside ambient air temperature is below 50 degrees Fahrenheit until concrete has attained specified strength as determined by test cylinders stored in field under equivalent conditions as concrete structure. PART 2 PRODUCTS 2.01 MATERIALS A. Form Ties: 1. General: a. Provide form ties for forming system selected that are manufactured by recognized manufacturer of concrete forming equipment. b. Do not use wire ties or wood spreaders of any form. c. Provide ties of type that accurately tie, lock, and spread forms. d. Provide form ties of such design that when forms are removed they locate no metal or other material within 1-1/2 inches of the surface of the concrete. e. Do not allow holes in forms for ties to allow leakage during placement of concrete. 2. Cone -snap or Flat Bar Form Ties: a. Cone -snap ties shall form a cone shaped depression in the concrete with a minimum diameter of 1 inch at the surface of the concrete and 1-1/2 inches deep. b. Provide neoprene waterseal washer which is located near the center of the concrete. 3. Taper Ties: a. Neoprene Plugs for Taper Tie Holes: Size so that after they are driven, plugs are located in center third of wall thickeners. CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 2 CONCRETE FORMWORK SECTION 03102 1 1 1 1 1 1 1 1 1 1 b. Drypack Mortar for Filling Taper Tie Holes: 1) Consist of mix of 1 part of Portland cement to 1 part of plaster sand. 2) Amount of water to be added to cement -sand mix is to be such that mortar can be driven into holes and be properly compacted. 3) Admixtures or Additives: Are not to be used in dry -pack mortar. B. Built-up Plywood Forms: 1. Built-up plywood forms may be substituted for prefabricated forming system subject to following minimum requirements: a. Size and Material: 1) Full size 4 by 8 feet plywood sheets, except where smaller pieces are able to cover entire area. 2) Sheet Construction: 5 -ply plywood sheets, 3/4 -inch nominal, made with 100 percent waterproof adhesive, and having finish surface that is coated or overlaid with surface which is impervious to water and alkaline calcium and sodium hydroxide of cement. b. Wales: Minimum 2 by 4 inch lumber. c. Studding and Wales: Contain no loose knots and be free of warps, cups, and bows. C. Steel or Steel Framed Forms: 1. Steel Forms: Provide forms that are: a. Rigidly constructed and capable of being braced for minimum deflection of finish surface. b. Capable of providing finish surfaces that are flat without bows, cups, or dents. 2. Steel Framed Plywood Forms: a. Provide forms that are rigidly constructed and capable of being braced. b. Plywood Paneling: 5 -ply, 5/8 inch nominal or 3/4 inch nominal, made with 100 percent waterproof adhesive, and having finish surface that is coated or overlaid with surface which is impervious to water and alkaline calcium and sodium hydroxide of cement. D. Incidentals: 1. External Angles: a. Where not otherwise indicated on the Plans, provide with 3/4 -inch bevel, formed by utilizing true dimensioned wood or solid plastic chamfer strip on walkways, slabs, walls, beams, columns, and openings. b. Provide 1/4 inch bevel formed by utilizing true dimensioned wood or solid plastic chamfer strip on walkways, walls, and slabs at expansion, contraction, and construction joints. CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 3 CONCRETE FORMWORK SECTION 03102 1 1 1 1 1 1 1 1 2. Keyways: Steel, plastic, or lumber treated with form coating, applied according to label directions. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: 1. Do not place any concrete until all forms have been thoroughly checked for alignment, level, strength, and to assure accurate location of all mechanical and electrical inserts or other embedded items. 3.02 INSTALLATION A. Forms and Accessories: 1. Vertical Forms: a. Remain in place minimum of 24 hours after concrete is placed. b. If, after 24 hours, concrete has sufficient strength and hardness to resist surface or other damage, forms may be removed. 2. Other Forms Supporting Concrete and Shoring: Remain in place as follows: a. Sides Of Footings: 24 hours minimum. b. Vertical Sides of Beams, Girders, and Similar Members: 48 hours minimum. c. Slabs, Beams, and Girders: Until concrete strength reaches specified strength or until shoring is installed. d. Shoring for Slabs, Beams, and Girders: Shore until concrete strength reaches specified strength. e. Wall Bracing: Until concrete strength of beams and slabs laterally supporting wall reaches specified strength. 3. Green Concrete: a. No heavy loading on green concrete will be permitted. b. Green concrete is defined as concrete with less than 100 percent of specified strength. 4. Immediately after forms are removed, carefully examine concrete surfaces, and repair any irregularities in surfaces and finishes as specified in Section 03300. B. Form Ties: 1. Cone -snap Rod and Bar Ties: Tie forms together at not more than 2 -foot centers vertically and horizontally. After forms are removed from wall, fill tie holes as follows: CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 4 CONCRETE FORMWORK SECTION 03102 1 1 1 I 1 1 1 1 1 1 1 a. Remove form ties from surfaces: b. Roughen cone shaped tie holes by heavy sandblasting before repair. c. Dry pack cone shaped tie holes with drypack mortar as specified in Section 03600. Taper Ties: a. Neoprene Plug in Taper Tie Holes: After forms and taper ties are removed from wall, plug tie holes with neoprene plug as follows: 1) Heavy sandblast and then clean tie holes. 2) After cleaning, drive neoprene plug into each of taper tie holes with steel rod. Final location of neoprene plug shall be in center third of wall thickness. Bond neoprene plug to concrete with epoxy. 3) Locate steel rod in cylindrical recess, made in plug, during driving. a) At no time are plugs to be driven on flat area outside cylindrical recess. b. Dry Pack Of Taper Tie Holes: After Installing Plugs in Tie Holes: 1) Coat tie hole surface with epoxy bonding agent and fill with drypack mortar as specified in Section 03600. a) Drypack Mortar: Place in holes in layers with thickness not exceeding tie hole diameter and heavily compact each layer. b) Dry pack the outside of the hole no sooner than 7 days after the inside of the hole has been dry packed. c) Wall surfaces in area of drypacked tie holes: On the water side of water containing structures and the outside of below grade walls: (1) Cover with minimum of 10 mils of epoxy gel. (2) Provide epoxy gel coating on wall surfaces that extend minimum of 2 inches past drypack mortar filled tie holes. (3) Provide finish surfaces that are free from sand streaks or other voids. C. Built-up Plywood Forms: 1. Studding: a. Spaced at 16 inches or 24 inches on center. b. Closer spacing may be required depending upon strength requirements of the forms, in order to prevent any bulging surfaces on faces of finished concrete work. c. Install studs perpendicular to grain of exterior plys of plywood sheets. 2. Wales: Form wales of double lumber material minimum size as specified in this Section. 3. Number of Form Reuses: Depends upon durability of surface coating or overlay used, and ability to maintain forms in condition such that they are capable of producing flat, smooth, hard, dense finish on concrete when stripped. CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 5 CONCRETE FORMWORK SECTION 03102 1 1 1 1 1 1 1 1 1 D. Steel or Steel Framed Forms:. 1. Steel Forms: a. Adequately brace forms for minimum deflection of finish surface. 2. Steel Framed Plywood Forms: a. Rigidly construct and brace with joints fitting closely and smoothly. b. Number of Form Reuses: Depends upon durability of surface coating or overlay used. 3. Built-up Plywood Forms: As specified in this Section may be used in conjunction with steel forms or steel framed plywood forms for special forming conditions such as corbels and forming around items which will project through forms. E. Bracing and Alignment of Forms: 1. Line and Grade: Limit deviations to tolerances which will permit proper installation of structural embedded items or mechanical and electrical equipment and piping. 2. Formwork: a. Securely brace, support, tie down, or otherwise hold in place to prevent any movement. b. Make adequate provisions for uplift pressure, lateral pressure on forms, and deflection of forms. 3. When Second Lift is Placed on Hardened Concrete: Take special precautions in form work at top of old lift and bottom of new lift to prevent: a. Spreading and vertical or horizontal displacement of forms. b. Grout "bleeding" on finish concrete surfaces. 4. Pipe Stubs, Anchor Bolts, and Other Embedded Items: Set in forms where required. 5. Cracks, Openings, or Offsets at Joints in Formwork: Close those that are 1/16 inch or larger by tightening forms or by filling with acceptable crack filler. 3.03 CONCRETE PLACEMENT 1. Form pressures not to exceed 1000 psf. 2. Keep concrete lifts less than 24 inches. Thoroughly vibrate concrete to achieve good consolidation, and eliminate entrapped air thereby minimizing voids. Internally vibrate through to previous lift to avoid lift lines. Avoid vibrator contact with the form liner. 3.04 INCIDENTALS A. Keyways: Construct keyways as indicated on the Plans. B. Reentrant Angles: May be left square. CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 6 CONCRETE FORMWORK SECTION 03102 1 1 1 1 1 1 I 1 I 1 1 1 1 1 1 C. Level Strips: Install level strips at top of wall concrete placements to maintain true line at horizontal construction joints. D. Inserts: 1. Encase anchor bolts, steps, reglets, castings, and other inserts, as indicated on the Plans or as required, in concrete. 3.05 TOLERANCES A. Finish concrete shall conform to shapes, lines, grades, and dimensions indicated on the Plans. B. The maximum deviation from true line and grade shall not exceed tolerances listed below at time of acceptance of project. 1. General: Comply with ACI 117, paragraphs 2.0 through 2.2 and paragraphs 4.0 through 4.5, except as modified in following: a. Slabs: 1) Slope: Uniformly sloped to drain when slope is indicated on the Plans. 2) Slabs Indicated to Be Level: Have maximum deviation of 1/8 inch in 10 feet without any apparent changes in grade. b. On Circular Tank Walls: The Contractor may deviate from finish line indicated on the Plans by use of forms with chord lengths not to exceed 2 feet. c. Inserts: Set inserts to tolerances required for proper installation and operation of equipment or systems to which insert pertains. d. Maximum Tolerances: As follows. Item Inches Sleeves and Inserts Plus 1/8 Minus 1/8 Projected Ends of Anchor Bolts Plus 1/4 Minus 0.0 Anchor Bolt Setting Plus 1/16 Minus 1/16 END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 7 CONCRETE FORMWORK SECTION 03102 1 1 1 I 1 1 t 1 1 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 03102 Page 8 1 1 1 1 1 1 1 1 1 1 1 SECTION 03150 CONCRETE ACCESSORIES PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Preformed expansion joint material. 2. Epoxy anchoring systems. 3. Waterstops. 4. Skateboard deterrent system. 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. C 203 - Test Methods for Breaking Load and Flexural Properties of Block - Type Thermal Insulation. 2. D 570 - Test Method for Water Absorption of Plastics. 3. D 624 - Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers. 4. D 638 - Test Method for Tensile Properties of Plastics. 5. D 746 - Test Method for Brittleness Temperature of Plastics and Elastomers by Impact. 6. D 747 - Test Method for Apparent Bending Modulus of Plastics by Means of a Cantilever Beam. 7. D 792 - Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement. 8. D 2240 - Test Method for Rubber Property — Durometer Hardness. B. U. S. Army Corps of Engineers (USACE): 1. CRD-C-572, Specification for Polyvinylchloride Waterstop. 1.03 SUBMITTALS A. Product Data: Submit sufficient information on each type of material for review to determine conformance of material to requirements specified. 1. Preformed expansion joint material 2. Epoxy anchoring systems 3. Waterstops 4. Skateboard deterrent system. CITY OF SAN MATEO Bayfront Levee Improvements Section 03150 Page 1 1 1 1 1 1 1 1 1 1 CONCRETE ACCESSORIES SECTION 03150 B. Quality Control Submittals: 1. Manufacturer's Instructions: Submit instructions for materials specified in this Section that are specified to be installed with such instructions. PART 2 PRODUCTS 2.01 EXPANDED POLYSTYRENE JOINT FILLER A. Commercially available polystyrene board, having following minimum characteristics: 1. Flexural Strength, Minimum: 35 pounds per square inch in accordance with ASTM C 203. 2. Compressive Yield Strength: Between 16 and 40 pounds per square inch, at 5 percent compression. 2.02 PREFORMED EXPANSION JOINT MATERIAL A. Material: Synthetic sponge rubber or bituminous fiber types. B. Use specific type in applications as indicated on the Plans. C. Sponge Rubber Type: 1. Manufacturers: One of the following or equal: a. Tammstech, Inc., Cementone. b. Burke Concrete Accessories Inc., Neoprene Sponge Rubber Expansion Joint. D. Bituminous Fiber Type: 1. Manufacturers: One of the following or equal: a. Tammstech, Inc., Hornboard/fiber. b. Burke Concrete Accessories Inc., Fiber Expansion Joint. 2.03 WATERSTOPS A. Provide flat, dumbbell type, center -bulb type or hydrophilic waterstops at construction joints. Size to suit joint. 1. Manufacturers: One of the following or equal: a. Burke Concrete Accessories Inc. b. Progress Unlimited c. Williams Products d. Edoco Technical Products B. Rubber waterstops shall conform to the requirements of Corps of Engineers CRD-C 513. CITY OF SAN MATEO Bayfront Levee Improvements Section 03150 Page 2 CONCRETE ACCESSORIES SECTION 03150 1 1 1 1 1 1 1 1 1 1 1 1 C. Preformed hydrophilic waterstops with adhesive back shall be Adeka Ultra Seal or equal, suitable for the joint and construction conditions. 2.04 EPDXY ANCHORING SYSTEMS A. Where indicated on the details, a non -mechanical anchoring system shall be used to embed bar reinforcing and steel bolts within cured concrete. Adhesive shall be Hilti HY150, Simpson SET, Simpson SET -XP, or approved equal. 2.05 SKATEBOARD DETERRENTS A. Skateboard deterrents shall be Aluminum Flat Bar with 5/8" diameter 316 stainless steel post -installed anchor bolt with counter sunk bolt head, 4 inch embedment, as manufactured by Ravensforge, or approved equal. PART 3 EXECUTION 3.01 INSTALLATION A. Joints: 1. Construct expansion, contraction, and construction joints as indicated on the Plans. 2. Preformed Expansion Joint Material: Fasten expansion joint strips to concrete, masonry, or forms with adhesive. No nailing will be permitted, nor shall expansion joint strips be placed without fastening. 3. When expanded polystyrene joint filler is indicated on the Plans or specified, place filler in correct position before concrete is placed against filler. Fill holes and joints in filler with caulking to prevent entry of mortar into joint or passage of mortar or concrete from one side of joint to other. B. Epoxy Anchoring Systems: 1. Installation of all anchor and adhesive including drilling and cleaning of holes shall be in accordance with the current ICBO Report. 2. Adhesives shall be used only in applications permitted by the ICBO Report. C. Skateboard Deterrents: 1. The anchor bolt shall be secured using an epoxy injection adhesive by Hilti or equivalent. The entire backing of the flat bar shall also be epoxied to the concrete surface. The contractor shall provide shop drawings showing all details before installation. 2. Skateboard deterrents shall be installed spaced 3 feet on center on the path sides of floodwalls #1, #5, #8, and #6 from Sta. 200+11.29 to Sta. 201+30.00, and from Sta. 208+20.00 to the end of wall. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 03150 Page 3 1 1 1 1 1 1 1 1 1 1 i CONCRETE ACCESSORIES SECTION 03150 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 03150 Page 4 SECTION 03200 CONCRETE REINFORCEMENT 1 1 1 1 1 1 1 1 1 1 PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Concrete reinforcement. 1.02 REFERENCES A. American Concrete Institute (ACI): 1. 301 — Specification for Structural Concrete for Buildings. 2. 315 - Detailing Manual: Details and Detailing of Concrete Reinforcement. 3. 318 - Building Code Requirements for Structural Concrete. B. American Society for Testing and Materials (ASTM): 1. A 143 - Practice for Safeguarding Against Embrittlement of Hot -Dip Galvanized Structural Steel Products and Procedure, for Detecting Embrittlement. 2. A 185 - Specification for Steel Welded Wire Fabric, Plain, for Concrete Reinforcement. 3. A 615 - Specification for Deformed and Plain Billet -Steel Bars for Concrete Reinforcement. C. American Welding Society (AWS): 1. D1.4 - Structural Welding Code - Reinforcing Steel. 1.03 SYSTEM DESCRIPTION A. The Plans contain general notes concerning amount of reinforcement and placing, details of reinforcement at wall corners and intersections, and details of extra reinforcement around openings in concrete. 1.04 SUBMITTALS A. Shop Drawings: 1. Shop Drawings on Reinforcing Steel: a. Submit to the Engineer copy of reinforcing steel detail drawings in accordance with Contract Documents. b. Changes to Reinforcing Steel Contract Document Requirements: 1) Indicate in separate letter submitted with shop drawings any changes of requirements indicated on the Plans for reinforcing steel. City OF SAN MATEO Bayfront Levee Improvements Section 03200 Page 1 CONCRETE REINFORCEMENT SECTION 03200 1 1 1 1 t 1 1 1 1 2) Such changes will not be acceptable unless the Engineer has accepted such changes in writing. c. Review of shop drawings by the Engineer will be limited to general compliance with the Contract Documents. B. Samples: 1. Bar Supports: Submit samples of chairs proposed for use along with letter stating where each type chair will be used. 1.05 DELIVERY, STORAGE, AND HANDLING A. Packing and Shipping: 1. Deliver bars bundled and tagged with identifying tags. B. Acceptance at Site: 1. Reinforcing Bars: Deliver reinforcing bars lacking grade identification marks accompanied by manufacturer's guarantee of grade. 1.06 SEQUENCING AND SCHEDULING A. Bar Supports: Do not place concrete until samples and attached data of bar supports has been accepted by the Engineer. PART 2 PRODUCTS 2.01 MATERIALS A. Reinforcement: 1. General: Provide reinforcing steel that is new material; of quality specified, free from excessive rust or scale or any defects affecting its usefulness. B. Reinforcing Bars: 1. Reinforcing Bars to Be Embedded in Concrete or Masonry: Grade 60 deformed bars conforming to ASTM A 615 except as specified in the next subparagraph. 2. Reinforcement resisting earthquake -induced flexural and axial forces in concrete frame members and in concrete wall boundary members shall comply with low alloy ASTM A 706. ASTM A 615 Grade 60 reinforcement may be used in these members if the following requirements are met: a. The actual yield strength based on mill tests does not exceed the specified yield strength by more than 18,000 pounds per square inch (retests shall not exceed this value by more than an additional 3,000 pounds per square inch). b. The ratio of the actual ultimate tensile stress to the actual tensile yield strength is not less than 1.25. City OF SAN MATEO Bayfront Levee Improvements Section 03200 Page 2 1 1 1 1 1 1 1 1 1 1 1 1 CONCRETE REINFORCEMENT SECTION 03200 3. Thread Bars: a. Provide thread bars having continuous rolled -in pattern of thread -like deformations along entire length. b. Provide hex nuts and couplers for the thread bars that develop 125 percent of yield strength of bar. c. Thread Bars: 1) Conform to ASTM A 615 Grade 60. 2) Manufacturers: One of the following or equal: a) DYWIDAG Systems International, DYWIDAG Threadbar. d. Do not substitute cut threads on regular reinforcing bars for thread bars. C. Bar Supports: 1. Reinforcement Support Chairs: a. Hot -dip galvanized steel. Provide hot -dip galvanized steel with plastic tips at surfaces which will be exposed to view. Use unless otherwise indicated on the Plans. b. Stainless Steel where indicated on the Plans. D. Tie Wires: Annealed steel. E. Welded Wire Fabric Reinforcement: 1. Welded Wire Fabric: ASTM A 185. 2. Fabric may be used in place of reinforcing bars if accepted by the Engineer. 3. Provide fabric in flat sheet form. 4. Provide fabric having cross-sectional area per linear foot of not less than cross-sectional area per linear foot of reinforcing bars indicated on the Plans. 2.02 EPDXY COATING A. All concrete bar reinforcement shall be epoxy coated in conformance with State Standard Specification 52-1.028, "Epoxy -coated Bar Reinforcement" and ASTM A934 except as provided herein. B. Wire reinforcement shall be epoxy coated in conformance with ASTM A884 to the requirements for Class A, Type 2 coating. C. All epoxy coatings shall be purple or gray in color. D. Prior to coating, the Contractor shall furnish a representative 1A -pound sample from each batch of epoxy coating material to be used, identified with the manufacturer's name and batch number. CITY OF SAN MATEO Bayfront Levee Improvements Section 03200 Page 3 1 1 1 1 1 1 1 1 CONCRETE REINFORCEMENT SECTION 03200 2.03 FABRICATION A. Shop Assembly: 1. Cut and bend bars in accordance with provisions of ACI 315 and ACI 318. 2. Bend bars cold. 3. Provide bars free from defects and kinks and from bends not indicated on the Plans. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: 1. Reinforcing Bars: a. Verify that bars are new stock free from rust scale, loose mill scale, excessive rust, dirt, oil, and other coatings which adversely affect bonding capacity when placed in the work. 3.02 PREPARATION A. Surface Preparation: 1. Reinforcing Bars: Thin coating of red rust resulting from short exposure will not be considered objectionable. Thoroughly clean any bars having rust scale, loose mill scale, or thick rust coat. 2. Cleaning of Reinforcement Materials: Remove concrete or other deleterious coatings from dowels and other projecting bars by wire brushing or sandblasting before bars are embedded in subsequent concrete placement. 3.03 INSTALLATION A. Reinforcing Bars: 1. No field bending of bars will be allowed. 2. Welding: a. Weld reinforcing bars where indicated on the Plans or acceptable to the Engineer. b. Perform welding in accordance with AWS D1.4. B. Placing Reinforcing Bars: 1. Accurately place bars and adequately secure them in position. 2. Overlap bars at splices as specified or indicated on the Plans. 3. Unless specifically otherwise indicated on the Plans, install bars at lap splices in contact with each other and fasten bars together with tie wire. City OF SAN MATEO Bayfront Levee Improvements Section 03200 Page 4 1 CONCRETE REINFORCEMENT SECTION 03200 1 1 1 1 I 1 1 1 1 4. If lap splice length for bars in concrete is not specified or indicated on the Plans, bars shall be lap spliced in accordance with ACI 318. 5. If not specified or indicated on the Plans and not specified in Division 4, lap splice bars in masonry in accordance with the Uniform Building Code. 6. Bar Supports: a. Provide in sufficient number to prevent sagging and to support loads during construction, but in no case less than quantities and at locations as indicated in ACI 315. b. Support reinforcing for concrete placed on ground by standard manufactured chairs, with steel plates for resting on ground. c. Do not use brick, broken concrete masonry units, spalls, rocks, or similar material for supporting reinforcing steel. 7. If not indicated on the Plans, provide protective concrete cover in accordance with ACI 318. C. Tying of Bar Reinforcement: 1. Fasten bars securely in place with wire ties. 2. Tie bars sufficiently often to prevent shifting. 3. There shall be at least 3 ties in each bar: length (does not apply to dowel lap splices or to bars shorter than 4 feet, unless necessary for rigidity). 4. Tie slab bars at every intersection around periphery of slab. 5. Tie wall bars and slab bar intersections other than around periphery at not less than every fourth intersection, but at not greater than following maximum spacings: Bar Size Slab Bars Spacing (Inches) Wall Bars Spacing (Inches) Bars Number 5 and Smaller 60 48 Bars Number 6 through Number 9 96 60 Bars Number 10 and Number 11 120 96 6. After tying wire ties, bend ends of wire ties in towards the center of the concrete section. Wire ties shall conform to the cover requirements of the reinforcing bars. 7. Above tying requirements do not apply to reinforcement for masonry. Refer to Division 4 for tying requirements for masonry. D. Lap Splices of Reinforcing Bars: 1. Where bars are to be lapped spliced at joints in concrete, ensure bars project from concrete first placed, minimum length equal to lap splice length indicated on the Plans. CITY OF SAN MATEO Bayfront Levee Improvements Section 03200 Page 5 CONCRETE REINFORCEMENT SECTION 03200 2. Where lap splice length is not indicated on the Plans, then provide lap splice length as specified in ACI 318 and this Division. 1 1 1 1 1 1 1 1 1 1 E. Welded Wire Fabric Reinforcement: 1. Install necessary wiring, spacing chairs, or supports to keep welded wire fabric in place while concrete is being placed. 2. Bend fabric as indicated on the Plans or required to fit work. 3. Unroll or otherwise straighten fabric to make perfectly flat sheet before placing in the Work, 4. Lap splice welded wire fabric as indicated on the Plans. 5. If lap splice length is not indicated on the Plans, splice fabric in accordance with ACI 318. END OF SECTION City OF SAN MATEO Bayfront Levee Improvements Section 03200 Page 6 1 1 1 1 1 1 1 1 1 1 1 1 1 SECTION 03300 CAST -IN -PLACE CONCRETE PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Cast -in -place concrete. B. Related Sections: 1. Section 03102 - Concrete Formwork. 2. Section 03150 - Concrete Accessories. 3. Section 03200 - Concrete Reinforcement. 4. Section 09960 - Coatings. 1.02 REFERENCES A. American Concrete Institute (ACI): 1. 211.2 - Standard Practice for Selecting Proportions for Structural Lightweight Concrete. 2. 301 - Specifications for Structural Concrete for Buildings. 3. 318 - Building Code Requirements for Structural Concrete. 4. Manual of Concrete Practice. 5. Recommended Practices. B. American Society for Testing and Materials (ASTM): 1. C 31 - Practice for Making and Curing Concrete Test Specimens in the Field. 2. C 33 - Specification for Concrete Aggregates. 3. C 39 - Test Method for Compressive Strength of Cylindrical Concrete Specimens. 4. C 40 - Test Method for Organic Impurities in Fine Aggregates for Concrete. 5. C 42 - Method of Obtaining and Testing Drilled Cores and Sawed Beams of Concrete. 6. C 88 - Test Method of Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate. 7. C 94 - Specification for Ready -Mixed Concrete. 8. C 114 - Test Methods for Chemical Analysis of Hydraulic Cement. 9. C 131 - Test Method for Resistance to Degradation of Small -Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine. 10. C 136 - Test Method for Sieve Analysis of Fine and Coarse Aggregates. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 1 I 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 11. C 143 - Test Method for Slump of Hydraulic Cement Concrete. 12. C 150 - Specification for Portland Cement. 13. C 157 - Test Method for Length Change of Hardened Hydraulic -Cement Mortar and Concrete. 14. C 171 — Sheet Materials for Curing Concrete 15. C 172 - Practice for Sampling Freshly Mixed Concrete. 16. C 173 - Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method. 17. C 203 - Test Methods for Breaking Load and Flexural Properties of Block - Type Thermal Insulation. 18. C 227 - Test Method for Potential Alkali Reactivity of Cement -Aggregate Combinations (Mortar -Bar Method). 19. C 260 - Specification for Air -Entraining Admixtures for Concrete. 20. C 289 - Test Method for Potential Alkali -Silica Reactivity of Aggregates (Chemical Method). 21. C 309 - Specification for Liquid Membrane -Forming Compounds for Curing Concrete. 22. C 311 - Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland -Cement Concrete. 23. C 330 - Specification for Lightweight Aggregates for Structural Concrete. 24. C 469 - Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression. 25. C 494 - Specification for Chemical Admixtures for Concrete. 26. C 567 - Test Method for Density of Structural Lightweight Concrete. 27. C 595 - Specification for Blended Hydraulic Cements. 28. C 618 - Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Portland -Cement Concrete. 29. D 75 - Practices for Sampling Aggregates. 30. D 1751 - Preformed Expansion Joint Fillers for Concrete Paving and Structural Construction (Nonextruding and Resilient Bituminous Types) 1.03 DEFINITIONS A. Alkali: Is defined to mean sum of sodium oxide and potassium oxide calculated as sodium oxide. B. Hairline Crack: Crack with a crack width of less than 4 thousandths of an inch. 1.04 SYSTEM DESCRIPTION A. Performance Requirements: CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 2 1 1 1 I 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 1. General: a. Except as otherwise specified, provide concrete composed of portland cement, fine aggregate, coarse aggregate, and water so proportioned and mixed as to produce plastic, workable mixture in accordance with requirements as specified in this Section and suitable to specific conditions of placement. b. Proportion materials in manner such as to secure lowest water - cement ratio which is consistent with good workability, plastic, cohesive mixture, and one which is within specified slump range. c. Proportion fine and coarse aggregate in manner such as not to produce harshness in placing nor honeycombing in structures. 2. Watertightness of Concrete Work: It is intent of this Section to secure for every part of the Work concrete and grout of homogeneous structure, which when hardened will have required strength, watertightness, and durability. a. It is recognized that some surface hairline cracks and crazing will develop in the concrete surfaces. b. Construction, contraction, and expansion joints have been positioned in structures as indicated on the Plans, and curing methods specified, for purpose of reducing number and size of these expected cracks, due to normal expansion and contraction expected from specified concrete mixes. c. Class A and Class B Concrete: Watertight: Repair cracks which develop in walls or slabs and repair cracks which show any signs of leakage until all leakage is stopped. d. Walls or foundation slabs that leak or sweat because of porosity or cracks too small for successful pressure grouting: Seal on water side by coatings of surface sealant system, as specified in this Section. e. Grouting and Sealing: Continue as specified above until structure is watertight and remains watertightfor not less than one year after final acceptance or date of final repair, whichever occurs later in time. 3. Workmanship and Methods: Provide concrete work, including detailing of reinforcing, conforming with best standard practices and as set forth in ACI 318, Manuals, and Recommended Practices. 1.05 SUBMITTALS A. Product Data: Submit data completely describing products B. Information on Heating Equipment to Be Used for Cold Weather Concreting: Submit information on type of equipment to be used for heating materials and/or new concrete in process of curing during excessively cold weather. C. For conditions that promote rapid drying of freshly placed concrete such as low Humidity, high temperature, and wind: Submit corrective measures proposed for use prior to placing concrete. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 3 1 1 1 1 1 1 1 1 I CAST -IN -PLACE CONCRETE SECTION 03300 D. Copies of Tests of Concrete Aggregates: Submit certified copies in triplicate of commercial laboratory tests of all samples of concrete aggregates. 1. Fine Aggregate: a. Clay lumps. b. Reactivity. c. Shale and chert. d. Soundness. e. Color. f. Decantation. 2. Coarse Aggregate: a. Clay lumps and friable particles. b. Reactivity. c. Shale and chert. d. Soundness. e. Abrasion loss. f. Coal and lignite. g. Materials finer than 200 sieve. E. Sieve Analysis: Submit sieve analyses of fine and coarse aggregates being used in triplicate at least every 3 weeks and at any time there is significant • change in grading of materials. F. Concrete Mixes: Submit full details, including mix design calculations for concrete mixes proposed for use for each class of concrete. 1. Include information on correction of batching for varying moisture contents of fine aggregate. 2. Submit source quality test records with mix design submittal. a. Include calculations for for based on source quality test records. G. Change in Aggregate Source, or Aggregate Quality from Same Source: Submit new set of design mixes covering each class of concrete. H. Test Batch Test Data: 1. Submit data for each test cylinder. 2. Submit data that identifies mix and slump for each test cylinder. I. Sequence of Concrete Placing: Submit proposed sequence of placing concrete showing proposed beginning and ending of individual placements. J. Curing Compound Other than Specified Compound: Submit complete data on proposed compound. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 4 CAST -IN -PLACE CONCRETE SECTION 03300 K. Repair of Defective Concrete: Submit mix design for grout. L. Acceptance of Method of Concrete Repair: Make no repair until the Engineer has accepted method of preparing surfaces and proposed method of repair. M. If Either Fine or Coarse Aggregate Is Batched from More than One Bin: Submit analyses for each bin, and composite analysis made up from these, using proportions of materials to be used in mix. I 1 1 1 1 N. Cement Mill Tests: Include alkali content, representative of each shipment of cement for verification of compliance with specified requirements. O. Pozzolan Certificate of Compliance: Identify source of pozzolan and certify compliance with requirements of ASTM C 618. P. Information on mixing equipment. Q. Drying shrinkage test data. 1.06 DELIVERY, STORAGE, AND HANDLING A. Packing and Shipping: 1. Deliver, store, and handle concrete materials in manner as to prevent damage and inclusion of foreign substances. 2. Deliver and store packaged materials in original containers until ready for use. 3. Deliver aggregate to mixing site and handle in such manner that variations in moisture content will not interfere with steady production of concrete of specified degree of uniformity and slump. B. Acceptance at Site: Reject material containers or materials showing evidence of water or other damage. 1.07 PROJECT CONDITIONS A. Environmental Requirements: 1. Hot Weather Concreting: a. When Ambient Air Temperature Is above 90 Degrees Fahrenheit: Prior to placing concrete, cool forms and reinforcing steel to by water cooling to below 90 degrees Fahrenheit. b. Temperature of Concrete Mix at Time of Placement: Keep temperature below 90 degrees Fahrenheit by methods which do not impair quality of concrete. 2. Cold Weather Concreting: a. Concrete placed below ambient air temperature of 45 degrees Fahrenheit and falling or below 40 degrees Fahrenheit: Make provision for heating water. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 5 CAST -IN -PLACE CONCRETE SECTION 03300 I 1 I I 1 1 1 1 1 1 b. If materials have been exposed to freezing temperatures to degree that any material is below 35 degrees Fahrenheit: Heat such materials. c. Heating Water, Cement, or Aggregate Materials: 1) Do not heat in excess of 160 degrees Fahrenheit. d. Protection of Concrete in Forms: 1) Protect by means of covering with tarpaulins, or other acceptable covering. 2) Provide means for circulating warm moist air around forms in manner to maintain temperature of 50 degrees Fahrenheit for at least 5 days. 3. For conditions that promote rapid drying of freshly placed concrete such as low humidity, high temperature, and wind: Take corrective measures to minimize rapid water loss from concrete. a. Furnish and use sufficient number of maximum and minimum self -recording thermometers to adequately measure temperature around concrete. 1.08 SEQUENCING AND SCHEDULING A. Schedule placing of concrete in such manner as to complete any single placing operation to construction, contraction, or expansion joint. PART 2 PRODUCTS 2.01 MATERIALS A. Aggregate: 1. General: a. Provide concrete aggregates that are sound, uniformly graded, and free of deleterious material in excess of allowable amounts specified. b. Grade aggregate in accordance with ASTM D75 and C136. c. Provide unit weight of fine and coarse aggregate which produces in place concrete with a calculated equilibrium density of not more than 135 pounds per cubic foot. B. Fine Aggregate: 1. Provide fine aggregate for concrete or mortar consisting of clean, natural sand or of sand prepared from crushed stone or crushed gravel. 2. Do not provide aggregate having deleterious substances in excess of following percentages by weight of contaminating substances. In no case shall total exceed percent listed. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 6 1 CAST -IN -PLACE CONCRETE SECTION 03300 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Item Test Method Percent Removed by decantation (dirt, silt, etc.) ASTM C117 3 Shale or Chert ASTM C295 1 Clay Lumps ASTM C142 1 3. Except as otherwise specified, grade fine aggregate from coarse to fine in accordance with requirements of ASTM C33. C. Coarse Aggregate: 1. General: Provide coarse aggregate consisting of gravel or crushed stone made up of clean, hard, durable particles free from calcareous coatings, organic matter, or other foreign substances. 2. Weight: Not exceeding 15 percent, for thin or elongated pieces having length greater than 5 times average thickness. 3. Deleterious Substances: Not in excess of following percentages by weight, and in no case having total of all deleterious substances exceeding 2 percent. Item Test Method Percent Shale or chert ASTM C295 1 Coal and lignite ASTM C123 1/4 Clay lumps and friable particles ASTM C142 1/4 Materials finer than Number 200 sieve ASTM C117 1/2* Except when material finer than Number 200 sieve consists of crusher dust, maximum amount shall be 1 percent. 4. Grading: a. Aggregate: As specified in ASTM C33, Size Number 57, except as otherwise specified or authorized in writing by the Engineer. b. Aggregate for Class CE Concrete for Encasement of Electrical Conduits: 1) Graded as specified in ASTM C33, Size Number 8. 2) Provide concrete utilizing this aggregate equal to Class C concrete in all other respects, and is designated as Class CE. D. Portland Cement: 1. General: Conform to specifications and tests for ASTM C150, Types II or III , Low Alkali, except as specified otherwise. 2. Low Alkali Portland: Have total alkali containing not more than 0.60 percent. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 7 CAST -IN -PLACE CONCRETE SECTION 03300 1 I 1 1 1 1 1 1 1 1 3. Exposed Concrete in Any Individual Structure: Use only one brand of portland cement. 4. Cement for Finishes: Provide cement from same source and of same type as concrete to be finished. E. Admixtures: 1. General: a. Do not use admixtures of any type, except as specified, unless written authorization has been obtained from the Engineer. b. Compatible with concrete and other admixtures. c. Do not use admixtures containing chlorides calculated as chloride ion in excess of 0.5 percent by weight. d. Use in accordance with manufacturer's recommendations and add each admixture to concrete mix separately. 2. Air Entraining Admixture: a. Provide all concrete with 5 percent, plus or minus 1 percent, entrained air of evenly dispersed air bubbles at time of placement. b. Conform to ASTM C260. 3. Pozzolan Admixture: a. Fly Ash Pozzolan: 1) Conforming to requirements of ASTM C618, Class F, may be used as admixture in concrete made with Type II portland cement. 2) Pozzolan may replace portland cement at ratio of 1.0 pound fly ash for each pound of portland cement replaced. 3) Maximum of 15 percent by weight of minimum quantities of portland cement listed in Table A under paragraph 2.03E may be replaced with fly ash pozzolan. 4) Do not use pozzolan as an admixture in concrete made with portland-pozzolan cement. 5) Loss on Ignition for Pozzolan: Not exceed four percent. b. Ground granulated blast -furnace slag, grades 100 or 120, complying with ASTM C989 may substitute for portland cement up to a maximum of 25% of the total cementitious material by weight. c. Substitutions that combine fly ash and ground granulated blast - furnace slag are limited to a combined total of 30% of the total cementitious material by weight with fly ash no more than 15% of the total. 4. Water Reducing Admixture: a. May be used at the Contractor's option. b. Conform to ASTM C494, Type A or Type D. c. May not contain air entraining agents. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 8 CAST -IN -PLACE CONCRETE SECTION 03300 1 1 1 t 1 I 1 1 1 d. Must be liquid form before adding to the concrete mix. e. No decrease in cement is permitted as result of use of water reducing admixture. 5. Superplasticizers: Are not to be used without acceptance by Engineer. F. Water: 1. Water for Concrete, Washing Aggregate, and Curing Concrete: Clean and free from oil and deleterious amounts of alkali, acid, organic matter, or other substances. 2. Chlorides and Sulfate Ions: a. Water for Conventional Reinforced Concrete: Use water not containing more than 1,000 milligrams per liter of chlorides calculated as chloride ion, nor more than 1,000 milligrams per liter of sulfates calculated as sulfate ion. G. Keyway Material: Steel, plastic, or lumber. H. Sprayed Membrane Curing Compound: Clear type with fugitive dye conforming to ASTM C 309, Type 10. I. Surface Sealant System: Manufacturers: One of the following or equal: 1. Radcon Laboratories, Inc., Las Vegas, Nevada, Formula Number 7. 2. IPA Systems, Philadelphia, Pennsylvania, Duripal. 2.02 EQUIPMENT A. Mixing Concrete: 1. Mixers may be of stationary plant, paver, or truck mixer type. 2. Provide adequate equipment and facilities for accurate measurement and control of materials and for readily changing proportions of material. 3. Mixing Equipment: a. Capable of combining aggregates, cement, and water within specified time into thoroughly mixed and uniform mass and of discharging mixture without segregation. b. Maintain concrete mixing plant and equipment in good working order and operated at loads, speeds, and timing recommended by manufacturer or as specified. c. Proportion cement and aggregate by weight. B. Machine Mixing: 1. Batch plant shall be capable of controlling delivery of all material to mixer within 1 percent by weight of individual material. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 9 CAST -IN -PLACE CONCRETE SECTION 03300 1 1 1 1 1 1 1 1 I 1 1 1 2. If bulk cement is used, weigh it on separate visible scale which will accurately register scale load at any stage of weighing operation from zero to full capacity. 3. Prevent cement from coming into contact with aggregate or with water until materials are in mixer ready for complete mixing with all mixing water. 4. Procedure of mixing cement with sand or with sand and coarse aggregate for delivery to project site, for final mixing and addition of mixing water will not be permitted. • 5. Retempering of concrete will not be permitted. 6. Discharge entire batch before recharging. 7. Volume of Mixed Material Per Batch: Not exceed manufacturer's rated capacity of mixer. 8. Mixers: a. Perform mixing in batch mixers of acceptable type. b. Equip each mixer with device for accurately measuring and indicating quantity of water entering concrete, and operating mechanism such that leakage will not occur when valves are closed. c. Equip each mixer with device for automatically measuring, indicating, and controlling time required for mixing. 1) Interlock device to prevent discharge of concrete from mixer before expiration of mixing period. C. Transit -mixed Concrete: 1. Mix and deliver in accordance with ASTM C 94. 2. Total Elapsed Time Between Addition of Water at Batch Plant and Discharging Completed Mix: Not to exceed 90 minutes or elapsed time at project site shall not exceed 30 minutes. 3. Under conditions contributing to quick setting, total elapsed time permitted may be reduced by the Engineer. 4. Equip each truck mixer with device interlocked so as to prevent discharge of concrete from drum before required number of turns and furnish such device that is capable of counting number of revolutions of drum. 5. Continuously revolve drum after it is once started until it has completely discharged its batch. a. Do not admit water until drum has started revolving. b. Right is reserved to increase required minimum number of revolutions or to decrease designated maximum number of revolutions allowed, if necessary, to obtain satisfactory mixing. The Contractor will not be entitled to additional compensation because of such increase or decrease. D. Other Types of Mixers: In case of other types of mixers, mixing shall be as follows: CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 10 1 1 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 1. Mix concrete until there is uniform distribution of materials, and discharge mixer completely before recharging. 2. Neither speed nor volume loading of mixer shall exceed manufacturer's recommendations. 3. Continue mixing for minimum of 1-1/2 minutes after all materials are in drum, and for batches larger than one cubic yard increase minimum mixing time 15 seconds for each additional cubic yard or fraction thereof, 2.03 MIXES. A. Measurements of Materials: 1. Measure materials by weighing, except as otherwise specified or where other methods are specifically authorized in writing by the Engineer. 2. Furnish apparatus for weighing aggregates and cement that is suitably designed and constructed for this purpose. 3. Accuracy of Weighing Devices: Furnish devices that have capability of providing successive quantities of individual material that can be measured to within one percent of desired amount of that material. 4. Measuring or Weighing Devices: Subject to review by the Engineer, and bear valid seal of the Sealer of Weights and Measures having jurisdiction. 5. Weighing Cement: a. Weigh cement separately. b. Cement in Unbroken Standard Packages (Sacks): Need not be weighed. c. Bulk Cement and Fractional Packages: Weigh such cement. 6. Mixing Water: Measured by volume or by weight. B. Concrete Proportions and Consistency: 1. Concrete Consistency and Composition: a. Provide concrete that can be worked readily into corners and angles of forms and around reinforcement without excessive vibration and without permitting materials to segregate or free water to collect on surface. b. Prevent unnecessary or haphazard changes in consistency of concrete. 2. Ratio of Coarse Aggregate to Fine Aggregate: Not less than 1.0 nor more than 2.0 for all concrete Classes, with exception of Class CE. 3. Aggregate: a. Obtain aggregate from source which is capable of providing uniform quality, moisture content, and grading during any single day's operation. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 11 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 4. Concrete Mix Water to Cement Ratio, Minimum Cement Content, and Slump Range: Conform to values specified in Table 1 in this Section. 5. Concrete Batch Weights: Control and adjust so as to secure maximum yield, and at all times maintain proportions of concrete mix within specified limits. 6. Mixture Modification: If required, by the Engineer, modify mixture within limits set forth in this Section. C. Concrete Mixes: 1. Proportioning of Concrete Mix: Proportion mixes on required average on compressive strength for as defined in Subparagraph 2.04A2. 2. Mixes: a. Adjusting of Water: After acceptance, do not change mixes without acceptance by Engineer, except that at all times adjust batching of water to compensate for free moisture content of fine aggregate. b. Total Water Content of Each Concrete Class: Not exceed those specified in Table A in this Section. c. Checking Moisture Content of Fine Aggregate: Furnish satisfactory means at batching plant for checking moisture content of fine aggregate. 3. Change in Mixes: Undertake. new trial batch and test program as specified in this Section. D. Hand Mixed Concrete: 1. Hand mix concrete only when acceptable to the Engineer. 2. Prepare hand mixed concrete on watertight, level platform in batches not to exceed 1/3 cubic yard each. 3. Aggregate: a. First spread required amount of coarse aggregate on platform in an even and uniform layer, and then over such aggregate spread proper proportion of fine aggregate. b. Combined Depth of Both Such Layers: Not be greater than one foot. 4. Cement: a. First evenly spread required quantity of cement over fine aggregate. b. Then turn entire batch with shovels at least twice before adding water. 5. Water: a. Then uniformly sprinkle or spray proper amount of water over batched materials. b. Then turn with shovels not less than three times before being removing from platform. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 12 1 CAST -IN -PLACE CONCRETE SECTION 03300 1 1 1 1 1 1 1 E. Classes of Concrete: 1. Provide concrete consisting of 5 classes, referred herein as Classes A, B, C, D, and CE specified in this Section and use where specified or indicated on the Plans. See Table 1 for requirements. 2. Class B Concrete: Class B concrete may be substituted for Class A concrete, when high -early strength concrete is needed in areas specifically accepted by the Engineer and that do not require sulfate resistant concrete. 3. Class C Concrete: Class C concrete may be used for fill for unauthorized excavation, but only upon the approval of the Engineer. 4. Class D Concrete: Use Class D for precast concrete items. 5. Class CE Concrete: Use Class CE for mow strips as indicated on the Plans. 6. All other concrete, unless specified or otherwise indicated on the Plans: Use Class A concrete. 7. Pumped Concrete: Provide pumped concrete that complies with all requirements of this Section. 8. Do not place concrete with slump outside limits indicated in Table 1. 9. Classes: a. Classes A, C, D, and CE Concrete: Make with Type II low alkali cement. b. Class B Concrete: Make with Type III low alkali cement. c. Admixtures: Provide admixtures as specified in this Section. TABLE 1 CONCRETE WITH AIR ENTRAINMENT Class Specified Compressive Strength fc at 28 Days (Pounds per Square Inch) Maximum Net Water to Cement Ratio Minimum Cement per Cubic Yard of Concrete by Weight (Pounds) Slump Range (Inches) A 4,000 0.45 564 2 to 4 B (Type III cement) 4,000 0.45 564 2 to 4 C 2,500 0.62 423 3 to 6 D 4,500 0.45 658 2 to 4 CE 2,500 0.62 564 3 to 6 F. Air Entraining Admixture: 1. Add agent to batch in portion of mixing water. 2. Batch solution by means of mechanical batcher capable of accurate measurement. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 13 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 2.04 SOURCE QUALITY CONTROL A. Tests: 1. Concrete Mixes: a. After concrete mixes have been accepted by Engineer, trial batches of the accepted Class A, Class B, and Class C concrete mix designs shall be prepared by a testing laboratory acceptable to the Engineer. b. Prepare trial batches by using specified cement and aggregates proposed to be used for the Work. c. Trial Batches: Provide batches of sufficient quantity to determine slump, workability, consistency, and finishing characteristics, and to provide sufficient test cylinders. d. Test Cylinders: Provide cylinders having six inch diameter by 12 inch length and that are prepared in accordance with ASTM C 31 for tests specified in this Section. e. Determine slump in accordance with ASTM C 143. f. Test Cylinders from Trial Batch: 1) Test 8 cylinders for compressive strength in accordance with ASTM C 39. a) Test 4 cylinders at 7 days and 4 at 28 days. b) Establish ratio between 7 day and 28 day strength for mix. Seven day strength may be taken as satisfactory indication of 28 day strength provided effects on concrete of temperature and humidity between 7 day and 28 day are taken into account. 2) Average Compressive Strength of 4 Test Cylinders Tested at 28 Days: Equal to or greater than required average compressive strength fcr on which concrete mix design is based. Drying Shrinkage: 1) Prepare 5 drying shrinkage specimens in accordance with ASTM C 157, except as modified herein. 2) Remove drying shrinkage specimens from molds at age of 23 hours plus or minus 1 hour after trial batching, then immediately place them in water at 73 degrees Fahrenheit plus or minus 3 degrees for at least 30 minutes and then measure specimens within 30 minutes thereafter to determine original length. Then submerge specimens in saturated lime water at 73 degrees Fahrenheit plus or minus three degrees for moist curing. 3) Make measurement to determine expansion expressed as percentage of original length at age 7 days. Use length at age 7 days as base length for drying shrinkage calculations. 4) Immediately store specimens in humidity controlled room maintained at 73 degrees Fahrenheit plus or minus 3 degrees and 50 percent plus or minus 4 percent relative humidity for remainder of test. g CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 14 CAST -IN -PLACE CONCRETE SECTION 03300 1 1 1 1 1 1 1 1 1 1 5) Make and report measurements to determine shrinkage expressed as percentage of base length separately for 7, 14, 21, and 28 days of drying after 7 days of moist curing. 6) Drying Shrinkage Deformation: a) Measure drying shrinkage deformation of each specimen as difference between base length and length after drying at each test age. b) Measure average drying shrinkage deformation of specimens to nearest 0.0001 inch at each test age. c) If drying shrinkage of any specimen departs from average of test age by more than 0.0004 inch, disregard results obtained from that specimen and test another specimen. d) Shrinkage of trial batch concrete at 28 days drying age shall not exceed 0.045 percent maximum. h. If trial batch tests do not meet specified requirements for slump, strength, workability, consistency, drying shrinkage, and finishing, change concrete mix design proportions and, if necessary, source of aggregate. Make additional trial batches and tests until an acceptable trial batch is produced that meets requirements of this Section. Perform test batches and tests required to establish trial batches and acceptability of materials without change in Contract Price. Do not place concrete until the concrete mix design and trial batch have been accepted by Engineer. 2. Required Average Compressive Strength: a. Determine required average compressive strength (fcr) for selection of concrete proportions for mix design, for each class of concrete, using calculated standard deviation and its corresponding specified compressive strength fc, in accordance with ACI 318, Part 3, Chapter 5. b. When test records of at least 30 consecutive tests that span period of not less than 45 calendar days are available, establish standard deviation as described in ACI 318, Part 3, Chapter 5 and as modified as follows herein. c. Provide test records from which to calculate standard deviation that represent materials, quality control procedures, and conditions similar to materials, quality control procedures, and conditions expected to apply in preparation of concrete for the Work. d. Provide changes in materials and proportions within test records that are more restricted than those for the Work. e. Specified Compressive Strength (fc) of Concrete Used in Test Records: Within 1,000 pounds per square inch of that specified for the Work. f. When lacking adequate test records for calculation of standard deviation meeting requirements, determine required average compressive strength for from Table 2. J. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 15 CAST -IN -PLACE CONCRETE SECTION 03300 I 1 1 t 1 1 TABLE 2 Specified Compressive Strength fc (pounds per square inch) Required Average Compressive Strength f cr (pounds per square inch) Less than 3,000 fc + 1,000 3,000 to 5,000 fc + 1,200 Over 5,000 fc + 1,400 3. Pozzolan: a. Sampling and Testing: 1) Sample and test pozzolan in accordance with ASTM C 311. 2) In Computing Water to Cement Ratio And Cement Content Per Cubic Yard Of Concrete: Consider cement weight to be weight of portland cement plus 100 percent of weight of fly ash. 4. Aggregate: a. Testing of concrete aggregate is at Contractor's expense. b. Sieves: 1) Use sieves with square openings for testing grading of aggregates. 2) Sieve Analyses: If sieve analyses indicate significant change in materials, the Engineer may require that new mix design be submitted and accepted before further placing of concrete. c. Sample aggregate in accordance with ASTM D 75 and C 136. d. Fine Aggregate: 1) Provide fine aggregate not containing strong alkali nor organic matter which gives color darker than standard color when tested in accordance with ASTM C 40. 2) Provide aggregate having soundness complying with requirements of ASTM C 33 when tested in accordance with ASTM C 88. 3) Provide aggregate complying with reactivity requirements of ASTM C 33 when tested in accordance with ASTM C 289. e. Coarse Aggregate: 1) Soundness when tested in accordance with ASTM C 88: Have loss not greater than 10 percent when tested with sodium sulfate. 2) Abrasion Loss: Not exceed 45 percent after 500 revolutions when tested in accordance with ASTM C 131. 3) Reactivity: Not exceed limits specified in Appendix of ASTM C 33 when tested in accordance with ASTM C 289. f. Portland Cement: 1) Determination Alkali Content: Determine by method set forth in ASTM C 114. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 16 CAST -IN -PLACE CONCRETE SECTION 03300 PART 3 EXECUTION 1 1 1 1 1 1 1 1 1 3.01 INSTALLATION A. Surface Sealant System: Apply as recommended by manufacturer published instructions. Where concrete continues to sweat or leak, apply additional coats of surface sealant until the sweating or leaks stop. B. Joints and Bonding: 1. As far as practicable construct concrete work as monolith. 2. Locations of contraction, construction, expansion, and other joints are indicated on the Plans or as specified in this Section. 3. Construction Joints: a. Where construction joints are not indicated on the Plans, provide slabs and walls with construction joints at intervals not greater than 30 feet. b. In order to preserve strength and watertightness of structures, make no other joints, except as authorized the Engineer. c. At construction joints, thoroughly clean concrete of laitance, grease, oil, mud, dirt, curing compounds, mortar droppings, or other objectionable matter by means of heavy sandblasting, and wash surfaces just prior to succeeding concrete placement. d. At Horizontal Joints: Immediately prior to resuming concrete placing operations, thoroughly spread bed of grout not less than 1/2 inch in thickness, nor more than 1 inch in thickness over horizontal joint surfaces. 4. Keyways in Joints: a. Provide keyways in joints as indicated on the Plans. b. Treat lumber keyway material with form release coating, applied in accordance with manufacturer's instructions. 5. Take special care to ensure that concrete is well consolidated around and against waterstops and that waterstops are secured in proper position. 6. Cleaning of Construction Joints: a. Wash construction joints free of sawdust, chips, and other debris after forms are built and immediately before concrete or grout placement. b. Should formwork confine sawdust, chips, or other loose matter in such manner that it is impossible to remove them by flushing with water, use vacuum cleaner for their removal, after which flush cleaned surfaces with water. c. Provide cleanout hole at base of each wall and column for inspection and cleaning. 7. Expansion, Contraction, and Construction Joints a. Constructed where and as indicated on the Plans. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 17 1 t 1 1 1 1 I 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 b. Waterstops, Expansion Joint Material, Synthetic Rubber Sealing Compound, and Other Similar Materials: As specified in Sections 03150. 8. Repair of Concrete: Where it is necessary to repair concrete by bonding mortar or new concrete to concrete which has reached its initial set, first coat surface of set concrete with epoxy bonding agent as specified in Section 03072. C. Conveying and Placing Concrete: 1. Convey concrete from mixer to place of final deposit by methods which prevent separation or loss of materials. 2. Use equipment for chuting, pumping, and conveying concrete of such size and design as to ensure practically continuous flow of concrete at delivery end without separation of materials. 3. Design and use chutes and devices for conveying and depositing concrete that direct concrete vertically downward when discharged from chute or conveying device. 4. Keep equipment for conveying concrete thoroughly clean by washing and scraping upon completion of any day's placement. D. Placing Concrete: 1. Place no concrete without prior authorization of the Engineer. 2. Do Not Place Concrete Until: a. Reinforcement is securely and properly fastened in its correct position and loose form ties at construction joints have been retightened. b. Dowels, bucks, sleeves, hangers, pipes, conduits, bolts, and any other fixtures required to be embedded in concrete have been placed and adequately anchored. c. Forms have been cleaned and oiled as specified. 3. Placement of concrete in which initial set has occurred, or of retempered concrete, will not be permitted. 4. Place no concrete during rainstorms or high velocity winds. 5. Protect concrete placed immediately before rain to prevent water from coming in contact with such concrete or winds causing excessive drying. 6. Keep sufficient protective covering on hand at all times for protection of concrete. 7. After acceptance, adhere to proposed sequence of placing concrete, except when specific changes are requested and accepted by the Engineer. 8. Notify the Engineer in writing of readiness, not just intention, to place concrete in any portion of the work. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 18 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 a. Provide this notification in such time in advance of operations as the Engineer deems necessary to make final inspection of preparations at location of proposed concrete placing. b. Place forms, steel, screeds, anchors, ties, and inserts in place before notification of readiness is given to the Engineer. c. Depositing Concrete: 1) Deposit concrete at or near its final position to avoid segregation caused by rehandling or flowing. 2) Do not deposit concrete in large quantities in one place and work along forms with vibrator or by other methods. 3) Do not drop concrete freely into place from height greater than 5 feet. 4) Use tremies for placing concrete where drop is over 5 feet. 5) Commence placement of concrete on slopes, at bottom of slope. 9. Place concrete in approximately horizontal layers not to exceed 24 inches in depth and bring up evenly in all parts of forms. 10. Continue concrete placement without avoidable interruption, in continuous operation, until end of placement is reached. 11. If more than 20 minutes lapse prior to placement of new concrete over concrete previously placed, reduce depth of layers being placed at one time, and/or increase placing equipment, until it is possible to return with placing operation to previously placed concrete within 20 minutes. 12. If concrete is to be placed over previously placed concrete and more than 20 minutes have elapsed, then spread layer of grout not less than 1/2 inch in thickness nor more than 1 inch in thickness over surface before placing additional concrete. E. Consolidating Concrete: 1. Place concrete with aid of acceptable mechanical vibrators. 2. Thoroughly consolidate concrete around reinforcement, pipes, or other shapes built into the work. 3. Provide sufficiently intense vibration to cause concrete to flow and settle readily into place and to visibly affect concrete over radius of at least 18 inches. 4. Vibrators: a. Keep sufficient vibrators on hand at all times to vibrate concrete as placed. b. In addition to vibrators in actual use while concrete is being placed, have on hand minimum 1 spare vibrator in serviceable condition. c. Place no concrete until it has been ascertained that all vibrating equipment, including spares, are in serviceable condition. 5. Take special care to place concrete solidly against forms so as to leave no voids. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 19 1 1 1 I 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 6. Take every precaution to make concrete solid, compact, and smooth, and if for any reason surfaces or interiors have voids or are in any way defective, repair such concrete in manner acceptable to the Engineer. Footings and Slabs on Grade: 1. Do not place concrete on ground or compacted fill until subgrade is in moist condition acceptable to the Engineer. 2. If necessary sprinkle subgrade with water not less than 6 nor more than 20 hours in advance of placing concrete. 3. If it becomes dry prior to actual placing of concrete, sprinkle again, without forming pools of water. 4. Place no concrete if subgrade is muddy or soft. G. Loading Concrete: 1. Green Concrete: a. No heavy loading of green concrete will be permitted. b. Green concrete is defined as concrete with less than 100 percent of the specified strength. 2. No backfill shall be placed against concrete walls until the concrete has reached the specified strength and the connecting slabs and beams have been cast and have reached the specified strength. 3. Use construction methods, sequencing, and allow time for concrete to reach adequate strength to prevent overstress of the concrete structure during construction. H. Curing Concrete: 1. General: a. Cure concrete by methods specified in this Section. b. Cure concrete minimum of 7 days. c. Cure concrete to be painted with water or plastic membrane. d. Do not use curing compound on concrete surfaces that are to receive paint or upon which any material is to be bonded. e. Water cure or plastic membrane cure concrete slabs which are specified to be sealed by concrete sealer. f. Cure other concrete by water curing or sprayed curing membrane at the Contractor's option. Floor slabs may be cured using plastic membrane curing. g. 2. Water Curing: a. Keep surfaces of concrete being water cured constantly and visibly moist day and night for period of not less than 7 days. b. Each day forms remain in place may count as 1 day of water curing. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 20 1 1 1 1 I 1 1 1 1 1 I 1 CAST -IN -PLACE CONCRETE SECTION 03300 c. No further curing credit will be allowed for forms in place after contact has once been broken between concrete surface and forms. d. Do not loosen form ties during period when concrete is being cured by leaving forms in place. e. Flood top of walls with water at least 3 times per day, and keep concrete surfaces moist at ail times during 7 day curing period. 3. Sprayed Membrane Curing: a. Apply curing compound to concrete surface after repairing and patching, and within 1 hour after forms are removed. b. If more than 1 hour elapses after removal of forms, do not use membrane curing compound, but apply water curing for full curing period. c. If surface requires repairing or painting, water cure such concrete surfaces. d. Curing Compound: 1) Do not remove curing compound from concrete in less than 7 days. 2) Curing compound may be removed only upon written request by the Contractor and acceptance by the Engineer, stating what measures are to be performed to adequately cure structures. 3) Take care to apply curing compound in area of construction joints to see that curing compound is placed within construction joint silhouette. 4) Remove curing compound placed within construction joint silhouette by heavy sandblasting prior to placing any new concrete. 5) Contractor's Option: Instead of using curing compound for curing of construction joints such joints may be water cured. 6) Apply curing compound by mechanical, power operated sprayer and mechanical agitator that will uniformly mix all pigment and compound. 7) Apply compound in at least 2 coats. 8) Apply each coat in direction 90 degrees to preceding coat. 9) Apply compound in sufficient quantity so that concrete has uniform appearance and that natural color is effectively and completely concealed at time of spraying. 10) Continue to coat and recoat surfaces until specified coverage is achieved and until coating film remains on concrete surfaces. 11) Thickness and Coverage of Compound: Provide compound having film thickness that can be scraped from surfaces at any and all points after drying for at least 24 hours. 12) The Contractor is cautioned that method of applying curing compound specified herein may require more compound than normally suggested by manufacturer of compound and also more than is customary in the trade. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 21 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 13) Apply amounts specified herein, regardless of manufacturer's recommendations or customary practice, if curing compound is used in place of water curing. 14) If the Contractor desires to use curing compound other than specified compound, coat sample areas of concrete wall with proposed compound and also similar adjacent area with specified compound in specified manner for comparison. a) If proposed sample is not equal or better, in opinion of the Engineer, in all features, proposed substitution will not be allowed. 15) Prior to final acceptance of the work, remove, by sandblasting or other acceptable method, any curing compound on surfaces exposed to view, so that only natural color of finished concrete is visible uniformly over entire surface. 4. Plastic Membrane Curing: a. Polyethylene film maybe used to cure slabs. Seal joints and edges with small sand berm. b. Install plastic membrane as soon as concrete is finished and can be walked on without damage. c. Keep concrete moist under plastic membrane. 3.02 CONCRETE FINISHING A. Protect persons and adjacent materials and finishes from dust, dirt and other surface or physical damage during finishing operations, including materials driven by wind. B. Cement for Finishes: 1. Addition of white cement may be required to produce finish which matches color of concrete to be finished. C. Exposed Concrete Surfaces: 1. Repair defective work, remove fins; offsets, and curing membrane, and grind projections smooth. Fill depressions 1/4 inch or larger in depth or width and tie holes with mortar after removal of curing membrane. a. Provide finished surfaces without gravel pockets and other defacements. 2. Provide a sacked finish by coating the concrete with sacking mortar. a. Coat entire surface with sacking mortar as soon as surface of concrete approaches surface dryness. b. Thoroughly rub mortar over area with clean burlap pads to fill all voids. c. While mortar is still plastic but partially set (so it cannot be pulled from voids), sack -rub surface with dry mix of sacking mortar (without water). There shall be no discernible thickness of mortar on concrete surfaces, except in voids; all surfaces shall be uniformly textured. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 22 1 1 1 1 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 d. Immediately begin a continuous moist cure for 72 hours. 3. At tops of walls, horizontal offsets, and similar unformed surfaces adjacent to formed surfaces, strike off smooth and finish with a sacked texture matching adjacent formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces. 4. Coat exposed surfaces in conformance with Section 09960. D. Horizontal Concrete: After proper and adequate vibration and tamping, use the following finishes for horizontal concrete surfaces. 1. All surfaces except where otherwise indicated herein: Steel trowel finish, without local depressions or high points, followed by light hairbroom finish. Do not use stiff bristle brooms or brushes. Perform brooming parallel to slab -drainage. Provide resulting finish that is rough enough to provide nonskid finish. 2. Coat exposed surfaces in conformance with Section 09960. E. Edges of Joints: 1. Provide joints having edges as indicated on the Plans. 2. Protect wall and slab surfaces at edges against concrete spatter and thoroughly clean upon completion of each placement. 3.03 FIELD QUALITY CONTROL A. Testing of Concrete: 1. During progress of construction, the City will have tests made to determine whether the concrete, as being produced, complies with requirements specified. 2. Tests will be performed in accordance with ASTM C 31, ASTM C 39, and ASTM C 172. 3. The City's laboratory technician will make and deliver test cylinders to the laboratory for testing. 4. Required Number Cylinders for testing by City: a. Not less than 3 cylinder specimens, 6 inch diameter by 12 inch long, will be tested for each 150 cubic yards of each class of concrete with minimum of 3 three specimens for each class of concrete placed and not less than 3 specimens for each half day's placement. b. One cylinder will be broken at 7 days and 2 at 28 days. 5. The City's laboratory technician will.test slump at the beginning of each placement, as often as necessary to keep slump within the specified range, and when requested to do so by the Engineer. 6. The Contractor shall: a. Coordinate test cylinder sampling with City's laboratory technician. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 23 1 1 1 1 1 1 1 1 1 I 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 b. Coordinate slump tests of concrete with the City's laboratory technician, who will use a slump cone in accordance with requirements of ASTM C 143. c. Not use concrete that does not meet specification requirements in regards to slump, but remove such concrete from project site. d. Provide concrete for test specimens when requested by the Engineer for the purposes of Quality Assurance testing. B. Air Entraining Admixture: 1. Test percent of entrained air in concrete at beginning of each placement, as often as necessary to keep entrained air within specified range, and when requested to do so by the Engineer. 2. Provide test equipment. 3. Do not use concrete that does not meet Specification requirements as to air entrainment and shall remove such concrete from project site. 4. Test air entrainment in concrete in accordance with ASTM C 173. 5. The Engineer may at any time test percent of entrained air in concrete received on project site. C. Enforcement of Strength Requirement: 1. Concrete is expected to reach higher compressive strength than that which is indicated in Table 1 as specified compressive strength fc. 2. Strength Level of Concrete: Will be considered acceptable if following conditions are satisfied. a. Averages of all sets of 3 consecutive strength test results is greater or equal to specified compressive strength f c. b. No individual strength test (average of 2 cylinders) falls below specified compressive strength fc by more than 500 pounds per square inch. c. Whenever one, or both, of 2 conditions stated above is not satisfied, provide additional curing of affected portion followed by cores taken in accordance with ASTM C 42 and ACI 318 and comply with following requirements: 1) If additional curing does not bring average of 3 cores taken in affected area to at least specified compressive strength fc, designate such concrete in affected area as defective. 2) The Engineer may require the Contractor to strengthen defective concrete by means of additional concrete, additional reinforcing steel, or replacement of defective concrete, all of the Contractor's expense. 3.04 ADJUSTING A. Repair of Defective Concrete: 1. Remove and replace or repair defective work. CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 24 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 2. Correct defective work as specified in this Article. 3. Do not patch, repair, or cover defective work without inspection by the Engineer. 4. Provide repairs having strength equal to or greater than specified concrete for areas involved. a. Chip out and key imperfections in the work and make them ready for repair. 5. . Dry Pack Method: a. Dry Pack Method: Use for holes having depth nearly equal to or greater than least surface dimension of hole, for cone -bolt, and narrow slots cut for repair. b. Smooth Holes: Clean and roughen by heavy sandblasting before repair. 6. Mortar Method of Replacement: Use for following: a. Holes too wide to dry pack and too shallow for concrete replacement. b. Comparatively shallow depressions, large or small, which extend no deeper than reinforcement nearest surface. 7. Concrete Replacement: a. Use: When holes extend entirely through concrete section or when holes are more than 1 square foot in area and extend halfway or more through the section. b. Method of Repair for Surfaces of Set Concrete to Be Repaired: First coat with epoxy bonding agent. 8. Acceptable Method of Concrete Repair: a. Make no repair until the Engineer has accepted method of preparing surfaces and proposed method of repair. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 25 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CAST -IN -PLACE CONCRETE SECTION 03300 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 03300 Page 26 1 1 1 1 1 1 SECTION 03400 PRECAST CONCRETE PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Precast concrete manholes. 2. Manhole appurtenances. B. Related Sections: 1. Section 02300 - Earthwork. 2. Section 03300 - Cast in Place Concrete. 1.02 QUALITY ASSURANCE A. American Concrete Institute (ACI), Building Code Requirements for Reinforced Concrete. B. Caltrans Standard Specifications. 1.03 REFERENCE STANDARDS A. American Society for Testing and Materials (ASTM): 1. C150 - Portland Cement. 2. C478 - Precast Reinforced Concrete Manhole Sections. 3. C858 - Underground Precast Concrete Utility Structures. 4. C913 - Precast Concrete Water/Wastewater Structures. 1.04 SUBMITTALS A. Standard manufacturer's product data. 1.05 DELIVERY, STORAGE, AND HANDLING A. All materials shall be delivered to the jobsite as a complete unit, clearly labeled with the manufacturer's product identification and printed instructions. B. All materials shall be stored in a secure location to prevent theft or damage and in accordance with the manufacturer's recommendations. C. All materials shall be handled and installed in accordance with the manufacturer's instructions. CITY OF SAN MATEO Bayfront Levee Improvements Section 03400 Page 1 1 1 1 1 1 t 1 1 PRECAST CONCRETE SECTION 03400 PART 2 PRODUCTS 2.01 PRECAST MANHOLES A. Where shown on the Plans, Contractor may use reinforced concrete structures that are cast at an off -site location. 1. Precast concrete manhole sections shall conform to ASTM C478, C588, and C913. B. All precast concrete structures shall be manufactured in a plant especially designed for that purpose. Standard Products should be used wherever feasible. C. Precast concrete manholes and covers shall be rated for H-20 traffic loading. 2.02 JOINT SEALERS A. All joints between precast concrete sections shall be made watertight by using a preformed plastic material that is permanently self -adhering and flexible. Compound shall be "Ram-Nek" as manufactured by K.T. Snyder Company, Houston, Texas or approved equal. 1. "Ram-Nek" is distributed locally by Hanson Concrete Products of Milpitas. 2. Follow manufacturer's recommended installation procedures. B. Where cast in place concrete is poured against a precast concrete structure, two sets of a pre -formed rubber hydrophilic water stop with adhesive back shall be installed on the precast side of the joint prior to the pour. Water stop shall be Adeka Ultra Seal MC -2010M or equivalent. 1. Follow manufacturer's recommended installation procedures. C. Grout used to seal pipe penetrations shall be non -shrink grout conforming to Section 03600-2.01 D. PART 3 EXECUTION 3.01 CASTING A. Precast concrete structures shall be cast and cured at the plant following manufacturer's procedures. B. Structures shall not be shipped to the job site until fully cured. 3.02 STORAGE, HANDLING AND DELIVERY A. Precast concrete structures shall be fully braced (with temporary struts if necessary) until delivered to the project site, installed, leveled and anchored into place as shown on the Plans. CITY OF SAN MATEO Bayfront Levee Improvements Section 03400 Page 2 1 1 1 1 t 1 1 1 1 1 1 1 1 1 1 PRECAST CONCRETE SECTION 03400 B. After cure, precast concrete structures may be stored on the project site in conformance with these specifications, at the Contractor's own risk. C. Contractor is responsible for coordinating the delivery of precast concrete structures and all trades required for their installation and anchorage. 3.03 INSTALLATION A. Precast concrete structures shall be installed as shown on the Plans, according to the manufacturer's recommendations. B. Joint sealers shall be used as specified herein for a watertight installation. 3.04 DEFECTIVE CONCRETE AND REPAIRS A. Precast concrete showing cracks, rock pockets, voids, spalls, or other defects that adversely affect the structural adequacy of the concrete shall be considered defective. 1. The Engineer shall be the arbiter as to whether concrete is defective. B. Defective concrete resulting from improper casting or curing shall be repaired or replaced at the plant prior to shipment. 1. All damaged concrete surfaces shall be inspected and any pour joints, voids, rock pockets, tie holes, etc. shall be patched at one time. C. Damaged concrete that results from transportation, handling, or storage after the piece has left the plant shall be repaired or replaced at no expense to the City. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 3 PRECAST CONCRETE SECTION 03400 1 1 1 1 1 1 1 1 THIS PAGE INTENTIONALLY LEFT BLANK CITY OF SAN MATEO Bayfront Levee Improvements Section 03400 Page 4 1 1 1 1 1 1 1 SECTION 03600 GROUTS PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Concrete mortar: 2. Grout. 3. Drypack mortar. 4. Nonshrink grout. 5. Epoxy grout. 6. Non -shrink epoxy grout. B. Related Sections: 1. Section 03071 - Epoxies. 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. C109 - Test Method for Compressive Strength of Hydraulic Cement Mortars (using 2 inch or 50 millimeter cube specimens). 2. C531 - Test Method for Liner Shrinkage and Coefficient of Thermal Expansion of Chemical -Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes. 3. C579 - Test Method for Compressive Strength of Chemical -Resistant Mortars and Monolithic Surfacings. 4. C827 - Test Method for Change in Height at Early Ages of Cylindrical Specimens from Cementitious Mixtures. 5. C939 - Test Method for Flow of Grout for Preplaced-Aggregate Concrete (Flow Cone Method). 6. C1090 - Test Method for Measuring Change in Height of Cylindrical Specimens from Hydraulic -Cement Grout. 7. C1107 - Standard Specification for Packaged Dry, Hydraulic -Cement Grout (Nonshrink). 8. C1181 - Test Methods for Compressive Creep of Chemical -Resistant Polymer Machinery Grouts. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 1 1 1 1 I 1 1 1 1 1 1 GROUTS SECTION 03600 1.03 SUBMITTALS A. Nonshrink Grout and Non -shrink Epoxy Grout: Submit manufacturer's literature and certified test data prior to installation. 1.04 DELIVERY, STORAGE, AND HANDLING A. All materials shall be delivered to the jobsite in their original, unopened packages or containers, clearly labeled with the manufacturer's product identification and printed instructions. B. All materials shall be stored in a cool dry place and in accordance with the manufacturer's recommendations. C. All materials shall be handled in accordance with the manufacturer's instructions. 1.05 PROJECT/SITE CONDITIONS A. Refer to manufacturer's literature or contact the manufacturer for any special physical or environmental limitations that may be required for use of products. 1.06 WARRANTIES A. Non -shrink Grout: The manufacturer shall warranty that the non -shrink grout will never go below its initial placement volume when tested in accordance with ASTM C1107. B. Non -shrink Epoxy Grout: The manufacturer shall warranty that non -shrink epoxy grout will show negligible shrinkage or expansion when tested in accordance with ASTM C531. PART 2 PRODUCTS 2.01 MATERIALS A. Concrete Mortar: 1. General: Consist of concrete mixture with coarse aggregate removed and water quantity adjusted as required. 2. At Exposed Concrete Surfaces Not to Be Painted or Submerged in Water: White cement. B. Grout: 1. Consist of mixture of Portland cement and sand. C. Dry -pack Mortar: 1. Consist of mixture of Portland cement and sand. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 2 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 1 GROUTS SECTION 03600 D. Non -shrink Grout: 1. Non -shrink grout shall be a preportioned and prepackaged cement -based mixture. It shall contain no metallic particles such as aluminum powder and no metallic aggregate such as iron filings. It shall require only the addition of potable water. 2. Potable water for pre-soaking, mixing, and curing shall be clean and free of oils, acids, alkalies, organics, and any other deleterious matter. 3. Bleeding: Non -shrink grout shall be free from the emergence of mixing water from within or the presence of water on its surface. 4. Non -shrink grout shall be in accordance with ASTM C1107. 5. Consistency: Non -shrink grout shall remain at a minimum flowable consistency for at least 45 minutes after mixing at 45 degrees Fahrenheit to 90 degrees Fahrenheit when tested in accordance with ASTM C230. If at a fluid consistency, it shall be verified in accordance with ASTM C939. 6. Dimensional Stability (height change): Non -shrink grout shall be in accordance with ASTM C1107, volume -adjusting Grade B or Cat 45 degrees to 90 degrees. It shall show 90 percent or greater bearing area under bases or baseplates. 7. Compressive Strength: Non -shrink grout shall show minimum compressive strengths at 45 degrees Fahrenheit to 90 degrees Fahrenheit in accordance with ASTM C1107 for various periods from the time of placement, including 5,000 pounds per square inch at 28 days when tested in accordance with ASTM C109 as modified by C1107. 8. Manufacturers: One of the following or equal: a. Five Star Products, Inc., Fairfield, CT, Five Star Grout. b. Master Builders, Inc., Cleveland, OH, Masterflow 928. c. L&M Construction Chemicals, Inc., Omaha, NE, CRYSTEX. E. Epoxy Grout: 1. Consist of mixture of epoxy and sand. 2. Sand: Clean, bagged, graded, and kiln dried silica sand. F. Non -shrink Epoxy Grout: 1. Non -shrink epoxy grout shall be a 100 percent solids, premeasured, prepackaged system containing a two -component thermosetting epoxy resin and inert aggregate. 2. Consistency: Non -shrink epoxy grout shall maintain a flowable consistency for at least 45 minutes at 70 degrees Fahrenheit. 3. Dimensional Stability (height change): a. Non -shrink epoxy grout shall have negligible shrinkage or expansion (less than 0.0006 in/in) when tested in accordance with ASTM C531. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 3 1 1 1 1 I 1 1 1 1 1 GROUTS SECTION 03600 4. Compressive Strength: Non -shrink epoxy grout shall show a minimum compressive strength of 10,000 pounds per square inch at 24 hours and 14,000 pounds per square inch at 7 days when tested in accordance with ASTM C579, Method B. 5. Compressive Creep: The compressive creep for non -shrink epoxy grout shall not exceed 0.0027 in/in when tested under a 400 pounds per square inch constant load at 140 degrees Fahrenheit in accordance with ASTM C1181. 6. Thermal Capability: The coefficient of thermal expansion for non -shrink epoxy grout shall not exceed 0.000018 inches per inch per degree Fahrenheit when tested under ASTM C531, Method B. 7. Manufacturers: One of the following or equal: a. Five Star Products, Inc., Fairfield, CT, Five Star Epoxy Grout. b. Master Builders, Inc., Cleveland, OH, Masterflow 648 CP Plus. c. L&M Construction Chemicals, Inc., EPOGROUT. 2.02 MIXES A. Concrete Mortar Mix: 1. Use water -cement ratio that is no more than that specified for concrete being repaired. 2. At Exposed Concrete Surfaces Not to Be Painted or Submerged in Water: Use sufficient white cement to make color of finished patch match that of surrounding concrete. B. Grout Mix: 1. For Concrete Repair: Mix in same proportions used for concrete being repaired, with only sufficient water to give required consistency for spreading. 2. For Spreading over the Surfaces of Construction or Cold Joints: Mix with no more water used than allowed by water -cement ratio specified for concrete. 3. For Other Applications: Mix in proportions by weight of one part cement to four parts of concrete sand. C. Dry -pack Mortar Mix: Use only enough water so that resulting mortar will crumble to touch after being formed into ball by hand. D. Non -shrink Grout: Mix in accordance with manufacturer's installation instructions such that resulting mix has fluid or flowable consistency and is suitable for placing by pouring. E. Epoxy Grout: 1. 'Mix in accordance with manufacturer's installation instructions for mixing. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 4 GROUTS SECTION 03600 1 1 1 1 I 1 1 1 1 1 1 1 2. Proportioning: a. For horizontal work, consist of mixture of one part epoxy as specified in Section 03071 with not more than 2 parts sand. b. For vertical or overhead work, consist of 1 part epoxy gel as specified in Section 03071 with not more than 2 parts sand. F. Non -shrink Epoxy Grout: Mix in accordance with manufacturer's installation instructions. PART 3 EXECUTION 3.01 EXAMINATION A. Inspect concrete surfaces to receive grout or mortar and verify that they are free of ice, frost, dirt, grease, oil, curing compounds, paints, impregnations and all loose material or foreign matter likely to affect the bond or performance of grout or mortar. B. Inspect baseplate and anchor systems for rust, oil, and other deleterious substances that may affect the bond or performance of grout. C. Confirm that newly placed concrete has been cured sufficiently to attain its design strength and limit further shrinkage. D. Verify that temperature of cementitious or epoxy grout does not exceed manufacturer's recommendations. 3.02 PREPARATION A. Surface Preparation: 1. Roughen all concrete surfaces by heavy sandblasting, chipping, or other mechanical means to assure bond. Loose or broken concrete shall be removed. 2. All grease, oil, dirt, curing compounds, laitance, and other deleterious materials that may affect bond that were identified in the inspection process shall be completely removed from concrete and bottoms of baseplates. All metal surfaces should have a 2 to 3 mil peak -to -valley profile for epoxy grouts. 3. For cementitious mortars and grouts, concrete surfaces shall be saturated surface dry. Any standing water shall be removed prior to placing grouts. 4. For epoxy grouts, do not wet concrete surfaces with water. Instead, where required, wet surfaces with epoxy for horizontal work or epoxy gel for vertical or overhead work prior to placing epoxy grouts. B. Forms and Headboxes for Grouts (Cementitious or Epoxy): 1. Forms for grouts shall be built of material with adequate strength to withstand the placement of grouts. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 GROUTS SECTION 03600 2. Forms must be rigid and liquid tight. All cracks and joints shall be caulked with an elastomeric sealant. All forms shall be lined with polyethylene for easy grout release. Forms carefully waxed with two coats of heavy-duty paste wax shall also be acceptable. 3. Forms shall be 4 to 6 inches higher than the baseplate on one side of the baseplate configuration when using head pressure for placement. 4. A sufficient number of headboxes shall be built to facilitate placement of grouts. 5. Air relief holes a minimum 1/8 inch in diameter shall be provided when required by a baseplate configuration to avoid entrapping air underneath. 3.03 APPLICATION A. Cement Mortar and Grout: 1. For Defective Concrete Repair: a. Filling: Filling of voids around items through the concrete. b. Grout Spreading: Spread over construction joints, cold joints, and similar type items. 2. Concrete Surfaces: a. Apply epoxy bonding agent to clean, roughened, and dry surfaces before placing mortar or grout. 3. Placing: a. Exercise particular care in placing Portland cement mortar or grout since they are required to furnish structural strength or impermeable water seal or both. b. Do not use cement mortar or grout that has not been placed within 30 minutes after mixing. B. Epoxy Grout: 1. Apply in accordance with manufacturer's installation instructions. 2. Use where specified herein or where indicated on the Plans. 3.04 PLACEMENT A. The Contractor shall make arrangements to have a grout manufacturer's representative present for a preconstruction meeting and during initial grout placement. Grout shall only be installed after the final equipment alignment is correct and accepted by the Engineer. 1. Grouts shall be mixed in accordance with the manufacturer's recommendations. 2. A mortar mixer with moving paddles shall be used for mixing grouts. For cementitious grouts, pre -wet the mixer and empty out excess water before beginning mixing. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 6 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 1 GROUTS SECTION 03600 3. Cementitious Grouts: a. Non -shrink cementitious grout shall be added to a premeasured amount of water that does not exceed the manufacturer's maximum recommended water content. b. Mix cementitious grouts per manufacturer's instructions for uniform consistency. c. Grouts may be drypacked, flowed, or pumped into place. All baseplate grouting shall take place from one side of a baseplate to the other to avoid trapping air. Do not overwork grouts. d. Do not retemper grout by adding more water after stiffening. e. Hydrostatic head pressure shall be maintained by keeping the level of the grout in the headbox above the bottom of the baseplate. The headbox should be filled to the maximum level and the grout worked down to top of baseplate. 4. Epoxy Grouts: a. Epoxy grouts shall be mixed in complete units. Do not vary the ratio of components or add solvent to change the consistency of the mix. b. Pour the hardener into the resin and mix for at least one minute and until each mixture is uniform in color. Pour the chemical components into the mortar mixer wheelbarrow and add the aggregate. Mix until aggregate is uniformly wetted. Overmixing will cause air entrapment in the mix. c. All epoxy grout shall be flowed into place using a headbox. All grouting shall take place from one side of a baseplate to the other in a continuous flow to avoid trapping air. d. Hydrostatic head pressure shall be maintained by keeping the level of grout in headboxes above the bottom of baseplates. Headboxes shall be filled to the maximum level and grout worked down to the bottom of baseplates. e. Epoxy grouts shall not be cut back after setting. The final level of grout will be as installed with all chamfer edges built into the formwork. 3.05 CURING A. Cementitious Grouts: 1. Grouts must be cut back to the lower edge of baseplates after reaching initial set. Provide a 45 degree angle cut back. 2. Clean equipment and tools as recommended by the grout manufacturer. 3. Cure Grouts in accordance with manufacturer's specifications and recommendations. Keep grout moist for a minimum of 3 days. The method needed to protect grouts will depend on temperature, humidity, and wind. Wet burlap, a soaker hose, sun shading, ponding and, in extreme conditions, a combination of methods shall be employed. CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 7 1 I 1 1 1 1 1 1 1 1 GROUTS SECTION 03600 4. Grouts shall be maintained above 40 degrees Fahrenheit until they have attained a compressive strength of 3,000 pounds per square inch or above 70 degrees Fahrenheit for a minimum of 24 hours to avoid damage from subsequent freezing. B. Epoxy Grouts: 1. Cure grouts in accordance with manufacturers' specifications and recommendations. Do not wet cure epoxy grouts. 2. Consult the manufacturer for appropriate cure schedule. In no case should any surface in contact with grout be allowed to fall below 50 degrees Fahrenheit for a minimum of 48 hours after placement. 3. Equipment and tools shall be cleaned immediately with.a strong liquid detergent and water solution before grout hardens. 3.06 FIELD QUALITY CONTROL A. Non -shrink cementitious grouts shall be tested for 24 hour compressive strength in accordance with ASTM C109. B. Non -shrink grouts shall be tested for 24 hour compressive strength in accordance with ASTM C579 (Method B). END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 03600 Page 8 1 1 1 1 1 1 1 1 I SECTION 05500 METAL FABRICATIONS PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Miscellaneous metal fabrications including: 1. Handrails and Guardrails. 2. Architectural Railing. 3. Ladders and Stairs. 4. Concrete Inserts. 5. Miscellaneous Metals: Aluminum, stainless steel, and structural steel. 6. Associated accessories to the above items. 1.02 REFERENCES A. Aluminum Association (AA): 1. Specification M32 -C22 -A41 - Aluminum Finishes. B. American Society for Testing and Materials (ASTM): 1. A 36/A 36M - Specification for Structural Steel. 2. A 48 - Specification for Grey Iron Castings. 3. A 53 - Specification for Pipe, Steel, Black and Hot -Dipped, Zinc -Coated, Welded and Seamless. 4. A 123 - Specification for Zinc (Hot -Dip Galvanized) Coatings on Iron and Steel Products. 5. A 167 - Specification for Stainless and Heat -Resisting Chromium -Nickel Steel Plate, Sheet, and Strip. 6. A 240 - Specification for Heat -Resisting Chromium and Chromium -Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels. 7. A 269 - Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service. 8. A 276 - Specification for Stainless Steel Bars and Shapes. 9. A 320 - Specification for Alloys - Steel Bolting Materials for Low - Temperature Service 10. A 307 - Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength. 11. A 325 - Specification for High -Strength Bolts for Structural Steel Joints. 12. A 489 - Specification for Carbon Steel Lifting Eyes. 13. A 490 - Specification for Heat -Treated Steel Structural Bolts, 150 ksi Minimum Tensile Strength. City OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 1 1 1 1 1 1 1 1 1 1 1 1 1 METAL FABRICATIONS SECTION 05500 14. A 500 - Specification for Cold -Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes. 15. A 501 - Specification for Hot -Formed Welded and Seamless Carbon Steel Structural Tubing. 16. A 569 - Specification for Steel, Carbon (0.15 Maximum, Percent) Hot - Rolled Sheet and Strip Commercial Quality. 17. A 570/A 570M - Specification for Steel, Sheet and Strip, Carbon. Hot - Rolled, Structural Quality. 18. A 635/A 635M - Specification for Steel, Sheet and Strip, Heavy -Thickness Coils, Carbon, Hot -Rolled. 19. A 653/A 653M - Specification for Steel Sheet, Zinc -Coated (Galvanized) or Zinc -Iron Alloy -coated (Galvannealed) by the Hot -Dip Process. 20. A 1264 - Safety Requirements for Workplace Floor and Wall Openings, Stairs and Railing Systems. 21. B 209 - Specification for Aluminum and Aluminum -Alloy Sheet and Plate. 22. B 221 — Aluminum Alloy, Extruded Bars, Rods, Wire, Shapes, Tubing. 23. B 429 - Specification for Aluminum -Alloy Extruded Structural Pipe and Tube. 24. B 782 - Standard Specification for Iron Graphite Sintered Bearings (Oil -Impregnated). 25. D 822 - Tests on Paint and Related Coatings Using Filtered Open -Flame Carbon -Arc Exposure Apparatus. 26. D 1794 - Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact). 27. D 3363 - Test Method for Film Hardness by Pencil Test. 28. E 894 - Anchorage of Permanent Metal Railing Systems and Rails for Buildings. 29. E 935 - Permanent Metal Railing Systems and Rails for Buildings. C. American Iron and Steel Institute (AISI): 1. Specification for the Design of Cold -Formed Steel Structural Members D. American National Standards Institute (ANSI): 1. A14.3 - Ladders -Fixed: Safety Requirements. 2. 531 Metal Bar Grating Manual E. American Welding Society (AWS). 1. D1.1 - Structural Welding Code: Steel 2. D1.3 - Structural Welding Code: Sheet Steel City OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 2 METAL FABRICATIONS SECTION 05500 F. International Conference of Building Officials (ICBO): 1. Uniform Building Code (UBC), latest edition. G. The National Association of Architectural Metal Manufactures (NAAMM) Manuals: 1. Metal Bar Gratings (ANSI/NAAMM MBG 531) 2. Pipe Railing Manual, Including Round Tube H. Occupational Safety and Health Administration (OSHA). 1. 1910.27 - Fixed Ladders. 1 1 1 1 1 1 1 1 1 1.03 QUALITY ASSURANCE A. Hand railing shall comply with SAA Code for fixed platforms, walkways, stairways and ladders, AS1657. B. Regulatory Requirements: Except as modified by the requirements specified herein and detailed on the plans, the installation of fabricated metal work shall conform to the "California Building Code" (CBC). 1.04 SUBMITTALS A. Shop Drawings: Submit for handrails and guardrails, including details on connection attachments, gates, kickplates, ladders, and angles. 1. Indicate profiles, sizes, connection attachments, reinforcing, anchorage, size and type of fasteners, and accessories. 2. Include erection drawings, elevations, and details where applicable. 3. Indicate welded connections using standard AWS welding symbols. Indicate net weld lengths. B. Quality Control Submittals: 1. Design Data. a. Guardrails: 3 copies of certified tests performed by an independent testing laboratory certifying that guardrails meet current State and Occupational Safety and Health Administration strength requirements. PART 2 PRODUCTS 2.01 GENERAL A. Materials: Unless otherwise specified or indicated on the Drawings, structural and miscellaneous metals shall conform with the standards of the ASTM, including the following: CITY OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 3 METAL FABRICATIONS SECTION 05500 1 I 1 1 1 1 I 1 1 1 t Item ASTM Standard No. Class, Grade Type or Alloy No. Cast Iron Cast Iron A 48 Class 40B Steel Galvanized sheet iron or steel A 653 Coating G90 Black steel, sheet or strip A 569, A 570 -- Coil (plate) A 635 -- Structural plate, bars, rolled shapes, and miscellaneous items A 36 -- Standard bolts, nuts, and washers A 307 -- High strength bolts, nuts, and hardened flat washers A 325 A 490 __ Eyebolts A 489 Type 1 Tubing, cold -formed A 500 -- Tubing, hot -formed A 501 -- Steel pipe A 53 Grade B Stainless steel Plate, sheet and strip A 167 Type 304 or 316* Bars and shapes A 276 Type 304 or 316* Bolts and threaded rods A 320 Type 304 or 316* Aluminum Sheet aluminum -flashing B 209 Alloy 5005-H14, 0.032 inches minimum thickness Sheet aluminum -structural B 209 Alloy 6061-T6 Structural aluminum B 308 B 209 Alloy 6061-T6 Extruded aluminum B 221 Alloy 6063-T42 Use Type 304L or Type 316L if material will be welded. 1. Stainless steels are designated by type or series defined by ASTM. 2. Where stainless steel is welded, use low -carbon stainless steel. 2.02 HANDRAILS AND GUARDRAILS A. General: Design and fabricate assemblies to conform to current local, State, and Occupational Safety and Health Administration standards and requirements. City OF SAN MATEO Bayfront Levee Improvements 1 Section 05500 Page 4 1 1 I 1 1 1 1 1 1 1 1 METAL FABRICATIONS SECTION 05500 B. Railing shall be designed in conformance with Caltrans standards. 1. Railing for Floodwall No. 3 shall be designed in conformance with Caltrans Bridge Design Specification Section 2.7.2 (May 2095). 2. All other railing shall be designed in conformance with Caltrans Bridge Design Specification Section 2.7.3 (May 2005). 2.03 ARCHITECTURAL RAILING A. Architectural railing shall be furnished and installed as scheduled and detailed on the Plans. B. Railing shall be aluminum component pipe rail Type LR or WR as manufactured by Sapa Building Products (Portland, OR) as indicated on the Plans to meet the requirements of the plans and specifications. 1. The intent is to provide a uniform appearance complimentary to existing architectural railing within Ryder Park. Railing shall be similar to the following Sapa Building Products style pictured herein and detailed on the Plans. 2. Before fabricating the railing, the Contractor shall submit six copies of the shop plans, showing complete dimensions and details of fabrication and materials for the Engineer's approval. A sample of the finished railing product shall also be submitted for review and approval. C. Aluminum Rails 1. Rails and balusters shall be extruded schedule 40 (standard) pipe. Rail shall be 2.5 -inch diameter; balusters shall be 1 -inch diameter. Baluster spacing shall be 4 inches on center. All extruded parts shall be made from high strength 6005-T5 aluminum alloy, and shall conform to ASTM B221. 2. Expansion pins shall be made of Type 316 stainless steel and shall conform to ASTM A276. 3. All screws, nuts, bolts and washers shall be 316 grade stainless steel. D. Gate 1. Furnish and install an access gate in Floodwall No. 2 as shown and detailed on the Plans. 2. Gate shall be fabricated using rails and balusters specified in Section 2.03C, with identical baluster spacing. 3. All screws, nuts, bolts, washers, hinges and hasps shall be 316 grade stainless steel. E. Finishes on Aluminum: All aluminum parts and members shall receive a Class aluminum oxide (anodic) coating to a thickness of 0.07 mil. The finish shall conform to the American Architectural Manufacturers Association (AAMA) designation AA-M10C22A41. CITY OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 5 METAL FABRICATIONS SECTION 05500 1 1 1 1 1 1 1 1 F. Workmanship: 1. Railing shall be a welded system with no visible surface welds at baluster connections. Balusters shall fit tightly into top and bottom rails. 2. Workmen experienced in fabrication of aluminum railing shall perform work according to the approved shop drawings. All welding shall be performed by certified welders in accordance with American Welding Society D1.2-97. 3. Welding of aluminum shall be in accordance with Section 5 of the latest AASHTO standard specification, American Welding Society D1.2-97. 4. Cutting shall be done by sawing or milling and all cuts shall be smooth and true. 5. Pipe railing, splices, cover plates, and bottom channels shall be bent to the horizontal curve where the radius of curvature is less than 200 feet. 2.04 FIXED LADDERS (San Mateo Creek floodwall access to observation platform.) A. Fixed aluminum Fixed aluminum wall ladders shall be fabricated from ASTM A6063 -T6 alloy in conformance with ASTM B221. B. Rungs shall be 1-1/4" round serrated and have cast aluminum rung connectors secured to 1/8" thick by 3" wide channel side rails with at least four solid aircraft rivets each for combined shear strength of over 3600 pounds per rung. Rung spacing shall be 12" on center, providing a minimum 7" distance from the adjacent wall surface, unless otherwise shown on the plans. C. Ladders shall be provided with a Class I anodized coating of aluminum oxide with a coating thickness of 0.07 mil. D. Ladder dimensions shall be as shown on the plans and verified in the field. E. Mounting hardware brackets shall be aluminum to match ladder materials. Where aluminum surfaces come into contact with dissimilar materials such as concrete or steel, exposed aluminum surfaces shall be painted with one coat of bituminous paint or other approved insulating material. The location of all mounting brackets shall be field -verified prior to fabrication. Mounting brackets shall be welded to the ladders prior to delivery, with mounting instructions. F. Ladders shall be mounted to concrete or masonry surfaces using 316 stainless steel bolts, with dielectric insulation to prevent direct contact between stainless steel and aluminum. G. Furnish and install ladder safety posts at the locations indicated on the Plans. Ladder safety posts shall be pre -assembled. by the manufacturer. H. Provide a 5 year warranty for defects in materials and workmanship. I. Fixed ladders shall be as manufactured by O'Keeffe's Inc, San Francisco, CA (888-653-3333) or an approved equal. City OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 6 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 METAL FABRICATIONS SECTION 05500 2.05 MISCELLANEOUS METAL A. Miscellaneous Aluminum: Fabricate aluminum products, not covered separately herein, in accordance with the best practices of the trade and field assemble by riveting or bolting. Do not weld or flame cut. B. Miscellaneous Stainless Steel: 1. Provide miscellaneous stainless steel items not specified herein as indicated on the Plans or specified elsewhere. Fabricate and install in accordance with the best practices of the trade. C. Miscellaneous Structural Steel: 1. Provide miscellaneous steel items not specified herein as indicated on the Plans or specified elsewhere. Fabricate and install in accordance with the best practices of the trade. PART 3 EXECUTION 3.01 EXAMINATION A. Verification of Conditions: Examine work in place to verify that it is satisfactory to receive the work of this Section. If unsatisfactory conditions exist, do not begin this work until such conditions have been corrected. 3.02 INSTALLATION A. General: Install products as indicated on the Plans, and in accordance with shop drawings and manufacturer's printed instructions, as applicable except where specified otherwise. B. Protect installed products until the completion of the Project. C. Touch-up, repair or replaced damaged products before Substantial Completion. 3.03 LADDERS A. Coordinate anchorages and mounting with other trades. B. Do not begin installation until supporting structures are complete and ladder installation will not interfere with supporting structure work. C. Provide hangers and struts required to support the loads imposed. D. Perform job site welding and bolting as specified for shop fabrication. E. Set ladders and other members in position and secure to structure as shown. F. Install ladders plumb, level, and true to line. CITY OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 7 1 1 1 I 1 1 1 1 1 METAL FABRICATIONS SECTION 05500 G. Provide steel closure plate to fill any gap between the stringer and surrounding shaft wall. Weld and finish with prime and paint finish of adjoining steel. 3.04 HANDRAILS AND GUARDRAILS A. Railings shall be installed in accordance with the approved shop drawings. B. During construction, keep exterior surfaces of handrails and guardrails covered with 0.4 millimeters, minimum, heat -shrink polyethylene film. C. Do not remove protective film before handrails and guardrails have been accepted by Engineer nor before other work in proximity of handrails and guardrails has been completed. D. Discontinue handrails and guardrails at lighting fixtures. E. Provide 1/8 inch diameter weep hole at base of each post. F. Where protection is applied for prevention of dissimilar materials electrolysis, make application such that none of the protective material is visible in the completed assembly. G. Space posts as indicated on the Plans or recommended by the system manufacturer. H. Erect guardrail straight, level, plumb, and true to the positions as indicated on the Plans. Correct deviations from true line of grade which are visible to the eye. 1. When properly installed, railing shall be parallel to the top of the concrete wall with balusters normal to the top of wall. 2. Provide mounting hardware for affixing railing posts and handrails to concrete or other surfaces as appropriate, using an aluminum baseplate and stainless steel concrete expansion or epoxy anchor bolts per the manufacturer's recommendations. Provide dielectric insulating sleeves and washers between the stainless steel hardware and aluminum plate. I. Do not cut reinforcing bars in concrete. Where required to fasten guardrail to other construction, fasten as indicated on the Plans. J. Make adequate provision for expansion and contraction of kickplates and rails. Make provisions for removable sections where indicated on the Plans. K. Make lower rails a single, unspliced length between posts, or continuous. L. Make top rails continuous whenever possible, and attach single, unspliced lengths to 3 posts minimum. M. Space attachment brackets as indicated on shop drawings or in manufacturer's installation instructions. N. Completed installation shall have handrails and railings rigid and free of play at joints and attachments. City OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 8 1 1 1 t 1 1 1 1 METAL FABRICATIONS SECTION 05500 O. Protect handrail and guardrail finish from scratches, gouges, dents, stains, and other damage. P. Replace damaged or disfigured handrails and guardrails with new. Q. Shortly before final acceptance of the work, and after removal of protective polyethylene film, clean handrails and guardrails with mild detergent or with soap and water. R. After cleaning, thoroughly rinse handrails and guardrails and wipe with soft cloth. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 9 I I I I I I I I I I I I I I I METAL FABRICATIONS SECTION 05500 THIS PAGE INTENTIONALLY LEFT BLANK City OF SAN MATEO Bayfront Levee Improvements Section 05500 Page 10 1 1 1 1 1 1 1 1 1 1 1 1 1 t 1 SECTION 09960 COATINGS PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Field applied coatings. 2. Coating accessories. B. Related Sections: 1. Section 03300 - Cast in Place Concrete. 1.02 REFERENCES A. American Society for Testing and Materials (ASTM): 1. D 16 - Terminology Relating to Paint, Varnish, Lacquer, and Related Products. B. SSPC — Society for Protective Coatings: 1. SSPC SP1 - Solvent Cleaning. 2. SSPC SP2 - Hand Tool Cleaning. 3. SSPC SP3 - Power Tool Cleaning. 4. SSPC SP7 - Brush -Off Blast Cleaning. 5. SSPC-SP 12 - High- and Ultrahigh -Pressure Water Jetting. 1.03 DEFINITIONS A. Exposed Surface: Any metal or concrete surface, indoors or outdoors that is exposed to view. B. Dry Film Thickness (DFT): Thickness of fully cured coating, measured in mils. C. Volatile Organic Compound: Volatile Organic Compound (VOC): Content of air polluting hydrocarbons in uncured coating product measured in units of grams per liter or pounds per gallon. D. Paints: Manufacturer's best ready -mixed coatings, except when field catalyzed, with fully ground pigments having soft paste consistency and capable of being readily and uniformly dispersed to complete homogeneous mixture, having good flowing and brushing properties, and capable of drying or curing free of streaks or sags. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 1 1 1 1 1 1 1 1 1 1 1 COATINGS SECTION 09960 1.04 PERFORMANCE REQUIREMENTS A. Coating materials for concrete surfaces shall be especially adapted for use in harsh marine environments. B. Coating for final coats shall be fume resistant, compounded with pigment suitable for exposure to Bay water and salt spray. C. Pigments shall be materials that do not darken, discolor, or fade due to action of Bay water and salt spray. 1.05 SUBMITTALS A. General: Submit in accordance with Special Provisions. B. Shop Drawings: Include schedule of where and for what use coating materials are proposed in accordance with requirements for Product Data. C. Product Data: Include description of physical properties of coatings including solids content and ingredient analysis, VOC content, temperature resistance, typical exposures and limitations, and manufacturer's standard color chips. 1. Regulatory Requirements: Submit data concerning the following a. Volatile organic compound limitations. b. Coatings containing lead compounds and PCBs. c. Compliance with current California Air Resources Board (GARB) regulations. D. Samples: Samples: Include 8 inch square draw -downs or brush -outs of topcoat finish when requested. Identify each sample as to finish, formula, color name and number and sheen name and gloss units. E. Certificates: Submit in accordance with requirements for Product Data. F. Manufacturer's Instructions: Include the following: 1. Special requirements for transportation and storage. 2. Mixing instructions. 3. Shelf Life. 4. Pot life of material. 5. Precautions for applications free of defects. 6. Surface preparation. 7. Method of application. 8. Recommended number of coats. 9. Recommended thickness of each coat. 10. Recommended total thickness. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 2 COATINGS SECTION 09960 1 1 I 1 1 1 1 1 11. Drying time of each coat, including prime coat. 12. Required prime coat. 13. Compatible and non -compatible prime coats. 14. Recommended thinners, when recommended. 15. Limits of ambient conditions during and after application. 16. Time allowed between coats. 17. Required protection from sun, wind and other conditions. 18. Touch-up requirements and limitations. G. Manufacturer's Field Reports: Submit for Engineer's record only. H. Quality Assurance Submittals: 1. Quality Assurance plan. 2. Qualifications of coating applicator including List of Similar Projects. 1.06 QUALITY ASSURANCE A. Applicator Qualifications: 1. Minimum of 5 years experience applying specified type or types of coatings under conditions similar to those of the Work. a. Provide qualifications of applicator and references listing five similar projects completed in the past two years. 2. Manufacturer approved applicator when manufacturer has approved applicator program. B. Regulatory Requirements: Comply with governing agencies regulations by using coatings that do not exceed permissible volatile organic compound limits and do not contain lead. C. Certification: Certify that applicable pigments are resistant to discoloration or deterioration when exposed to ultraviolet radiation and salt spray. D. Field Samples: Paint one complete surface of each color scheme to show colors, finish texture, materials and workmanship. Obtain approval before painting other surfaces. Approved field sample may be part of Work. E. Compatibility of Coatings: Use products by same manufacturer for prime coats, intermediate coats, and finish coats on same surface, unless specified otherwise. F. Services of Coating Manufacturers Representative: Arrange for coating manufacturers representative to attend pre -installation conferences and to make periodic visits to the project site to provide consultation and inspection services during surface preparation and application of coatings. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 3 1 1 1 1 1 1 1 1 1 1 COATINGS SECTION 09960 1.07 PRODUCT DELIVERY, STORAGE, AND HANDLING A. Deliver, store, and handle products in accordance with the Special Provisions. B. Remove unspecified and unapproved paints from project site immediately. C. Deliver containers with labels identifying the manufacturer's name, brand name, product type, batch number, date of manufacturer, expiration date or shelf life, color, and mixing and reducing instructions. D. Store coatings in well ventilated facility that provides protection form the sun weather, and fire hazards: Maintain ambient storage temperature between 45 and 90 degrees Fahrenheit, unless otherwise recommended by the manufacturer. E. Take precautions to prevent fire and spontaneous combustion. 1.08 ENVIRONMENTAL CONDITIONS A. Surface Moisture Contents: Do not coat surfaces that exceed manufacturer specified moisture contents, or when not specified by the manufacturer, the following moisture contents: 1. Cured Concrete: 12 percent. B. Do Not Apply Coatings: 1. Under dusty conditions, unless tenting, covers, or other such protection is provided for structures to be coated. 2. When light on surfaces measures less than 15 foot-candles. 3. When ambient or surface temperature is less than 45 degrees Fahrenheit. 4. When relative humidity is higher than 85 percent. 5. When surface temperature is less than 5 degrees Fahrenheit above dew point. 6. When surface temperature exceeds the manufacturer's recommendation. 7. When ambient temperature exceeds 90 degrees Fahrenheit, unless manufacturer allows a higher temperature. 8. Apply clear finishes at minimum 65 degrees Fahrenheit. C. Provide fans, heating devices, dehumidifiers, or other means recommended by coating manufacturer to prevent formation of condensate or dew on surface of substrate, coating between coats and within curing time following application of last coat. D. Provide adequate continuous ventilation and sufficient heating facilities to maintain minimum 45 degrees Fahrenheit for 24 hours before, during and 48 hours after application of finishes. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 4 COATINGS SECTION 09960 1 1 1 1 1 1 1 1 1 1 1 1.09 PROTECTION A. Protect adjacent surfaces from paint and damage. Repair damage resulting from inadequate or unsuitable protection. B. Furnish sufficient drop cloths, shields and protective equipment to prevent spray or droppings from fouling surfaces not being painted and in particular, surfaces within storage and preparation area. C. Place cotton waste, cloths and material which may constitute fire hazard in closed metal containers and remove daily from site. D. Remove surface hardware, fittings, and fastenings prior to painting operations. Carefully store, clean and replace on completion of painting in each area. Do not use solvent or degreasers to clean hardware that may remove permanent lacquer finish. 1.10 EXTRA MATERIALS A. Extra Materials: Deliver to City maintenance yard as directed. Include minimum 1 gallon of each type and color of coating applied. 1. When manufacturer packages material in gallon cans, deliver unopened labeled cans as comes from factory. 2. When manufacturer does not package material in gallon cans, deliver material in new gallon containers, properly sealed and identified with typed labels indicating brand, type and color. PART 2 PRODUCTS 2.01 MANUFACTURERS A. One of the following or equal: 1. Carboline: Carboline, St. Louis, MO. 2. Devoe: Devoe Coatings, Louisville, KY. 3. Dunn Edwards: Dunn Edwards Paints, Los Angeles, CA. 4. Frazee: Frazee/Deer-O Paints, City of Commerce, CA. 5. Fuller: Fuller O'Brien Paints, San Francisco, CA. 6. Pittsburgh: Pittsburgh Paints. 7. P & L: Pratt & Lambert. 8. Sinclair: Sinclair Paints. 9. Tnemec: Tnemec Co., Kansas City, MO. 10. Wasser: Wasser High Tech Coatings, Kent, WA. 2.02 PRETREATMENT, PRIMERS, AND PRIMER -SEALERS A. Pretreatment, primers, and primer -sealers shall be as specified herein or as recommended by the specific paint manufacturer for each paint system furnished. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 5 COATINGS SECTION 09960 1 1 1 1 1 1 1 1 1 1 1 B. Primers and primer -sealers shall be as manufactured by the paint supplier or certified as compatible with the paint system. Colors of prime and intermediate coats shall be compatible with color of top coat. C. Surface Cleaner and Degreaser: As manufactured by one of the following or equal: 1. Carboline Surface Cleaner No.3. 2. Devoe: Devprep 88. 2.03 MIXES A. Mix epoxy parts in accordance with manufacturer's instructions. B. Mix epoxy in containers furnished by manufacturer for mixing purposes. Mix unit quantities only. Use power mixer for minimum time recommended by manufacturer. Do not include time during pouring or stirring in mixing time. 2.04 COLORS A. Final topcoat color shall be selected by the City from the manufacturer's standard color pallet as submitted. B. Prime and intermediate coats may be tinted a complementary color to assist in obtaining coverage. C. In general, color will be a shade of tan or buff. 2.05 PAINTING SCHEDULE A. For convenience, the coating system of one manufacturer, Tnemec, is listed for reference in addition to the generic painting system names to establish a level of acceptable quality. Substitutions may be made in accordance with this specification. B. Provide all necessary preparation, primers, and sealers in conformance with the paint manufacturer's standards, whether specifically called out in the painting schedule or not. It is the Contractor's responsibility to provide a complete system. C. Coating Systems Surface Generic Coating System Tnemec Reference System No. Coats and DFT per (mils) Exposed Concrete Prep: Cured, clean, dry and free of oil and other contaminants. Prime: Polyamine Epoxy Series 215 Surfacing Epoxy Intermediate: Water Based Epoxy Series Typoxy27W6 1 (8-10) Top: Aliphatic Polyurethane Series 750 Endura Shield 1 (3-5) Architectural Railing Factory coated per Section 05500. --- --- CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 6 COATINGS SECTION 09960 PART 3 EXECUTION 3.01 GENERAL PROTECTION I 1 i 1 1 1 1 1 1 A. Protect adjacent surfaces from coatings and damage. Repair damage resulting from inadequate or unsuitable protection. B. Protect adjacent surfaces not to be coated from spatter and droppings with drop cloths and other coverings. 1. Mask off surfaces of items not to be coated or remove items from area. C. Furnish sufficient drop cloths, shields and protective equipment to prevent spray or droppings from fouling surfaces not being coated and in particular, surfaces within storage and preparation area. D. Place cotton waste; cloths and material which may constitute fire hazard in closed metal containers and remove daily from site. E. Remove railings, surface hardware, fittings and fastenings prior to the start of coating operations: Carefully store, clean and replace previously removed hardware, fittings and fastenings on completion of coating in each area. Do not use solvent or degreasers to clean hardware or fittings that may remove permanent finishes. 3.02 GENERAL PREPARATION A. Protect installed railings, concrete accessories, and adjacent coated surfaces from abrasive blasting to prevent damage caused by sand or dust. B. Prepare surfaces in accordance with coating manufacturer's instructions, or when none, the following: 1. Mildew: Remove by scrubbing with solution of tri-sodium phosphate and chlorine bleach. Rinse with clean water and allow surface to dry completely. C. Concrete: 1. Allow new concrete to cure for minimum of 28 days before coating. 2. Clean concrete surfaces of dust, mortar, fins, loose concrete particles, form release materials, oil, and grease. Fill voids so that surface is smooth. Etch or brush-off blast clean in accordance with SSPC SP -7 to provide surface profile similar to 80 -grit sandpaper, or as recommended by coating manufacturer. 3.03 GENERAL APPLICATION REQUIREMENTS A. Apply coatings in accordance with manufacturer's instructions. B. Verify surface preparation immediately before applying coatings in accordance with SSPC Pictorial Surface Preparation Standard. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 7 1 1 I 1 1 1 1 COATINGS SECTION 09960 C. Allow surfaces to dry, except where coating manufacturer requires surface wetting before coating. D. Apply minimum number of specified coats. E. Apply coats to thicknesses specified, especially at edges and corners. F. Apply additional coats when necessary to achieve specified thicknesses. G. Coat surfaces without drops, ridges, waves, holidays, laps, or brush marks. H. Remove spatter and droppings after completion of coating. I. When multiple coats of same material are specified, tint prime coat and intermediate coats with suitable pigment to distinguish each coat. J. Dust coatings between coats. Lightly sand and dust surfaces to receive gloss finishes, unless instructed otherwise by coating manufacturer. K. Apply coating by brush, roller, trowel, or spray, unless particular method of application is required by coating manufacturer's instructions or these Specifications. L. Spray Application: 1. Stripe coat edges by brush before beginning spray application, as necessary, to ensure specified coating thickness along edges. 2. When using spray application, apply coating to thickness not greater than that suggested in coating manufacturer's instructions for brush coat application. 3. Use airless spray method, unless air spray method is required by coating manufacturer's instruction or these Specifications. 4. Conduct spray coating under controlled conditions. Protect adjacent construction and property from coating mist or spray. M. Drying and Recoating: 1. Provide fans, heating devices, or other means recommended by coating manufacturer to prevent formation of condensate or dew on surface of substrate, coating between coats and within curing time following application of last coat. 2. Limit drying time to that required by these Specifications or coating manufacturer's instructions. 3. Do not allow excessive drying time or exposure which may impair bond between coats. 4. Recoat epoxies within time limits recommended by coating manufacturer. 5. When time limits are exceeded, abrasive blast clean prior to applying another coat. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 8 COATINGS SECTION 09960 1 I 1 1 1 1 1 6. When limitation on time between abrasive blasting and coating cannot be met before attachment of components to surfaces which cannot be abrasive blasted, coat components before attachment. T Ensure primer and intermediate coats of coating are unscarred and completely integral at time of application of each succeeding coat. 8. Touch up suction spots between coats and apply additional coats where required to produce finished surface of solid, even color, free of defects. 9. Leave no holidays. 10. Sand and recoat scratched, contaminated, or otherwise damaged coating surfaces so damages are invisible to naked eye. N. Concrete: 1. Apply first coat (primer) only when surface temperature of concrete is decreasing in order to eliminate effects of off -gassing on coating. O. Application: 1. Apply coatings in accordance with general application requirements and as follows. 2. Apply 3 coat system consisting of: a. Primer b. Intermediate Coat c. Top Coat 3. Recoat or apply succeeding epoxy coats within 30 days or within time limits recommended by manufacturer, whichever is shorter. Prepare surfaces for recoating in accordance with manufacturer's instructions. 3.04 FIELD SAMPLE ON FLOODWALL A. After concrete has cured, a minimum 20 square -foot section of wall shall be finished using the complete coating system submitted with favorable review, following manufacturer's recommendations and as specified herein. B. After top coat has dried, City representatives will inspect the section before Contractor continues with the remainder of work at the Engineer's direction. C. If City elects to change the coating system, City will furnish replacement coating specifications as a City initiated change order. City will compensate Contractor only for the cost of the applying the coating sample including submittals, minimum material order, tools, equipment and labor. 3.05 FIELD QUALITY CONTROL A. Each coat will be inspected. Strip and remove defective coats, prepare surfaces and recoat. When approved, apply next coat. B. Control and check dry film thicknesses and integrity of coatings. CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 9 1 1 1 1 1 1 i 1 1 COATINGS SECTION 09960 C. Measure dry film thickness with calibrated thickness gauge. D. Dry film thicknesses may be checked with Elcometer or Positector 2000. E. Verify coat integrity with low -voltage holiday detector. Allow Engineer to use detector for additional checking. F. Check wet film thickness before epoxy coating cures on concrete substrates. G. Arrange for services of Coating manufacturer's field representative to provide periodic field consultation and inspection services to ensure proper surface preparation of facilities and items to be coated, and to ensure proper application and curing. 1. Notify Engineer 24 hours in advance of each visit by Coating Manufacturer's representative. 2. Provide Engineer with a written report by Coating Manufacturer's representative within 48 hours following each visit. 3.06 SCHEDULE OF ITEMS NOT REQUIRING COATING A. General: Unless specified otherwise, the following items do not require coating. 1. Items that have received final coat at factory and not listed to receive coating in field. 2. Aluminum, brass, bronze, copper, plastic, rubber, stainless steel, chrome, everdur, or lead. 3. Buried or encased piping or conduit. 4. Concrete not exposed to view. 5. Steel to be encased in concrete. 3.07 CLEANING A. As work proceeds and upon completion, promptly remove paint where spilled, splashed, or spattered. B. During progress of work keep premises free from unnecessary accumulation of tools, equipment, surplus materials and debris. C. Upon completion of work leave premises neat and clean. END OF SECTION CITY OF SAN MATEO Bayfront Levee Improvements Section 09960 Page 10 1 1 1 1 1 1 1 1 1 1 1 APPENDIX I BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 AGREEMENT FOR PUBLIC IMPROVEMENT CITY OF SAN MATEO CITY COUNCIL AWARD THIS AGREEMENT, made and entered into in the City of San Mateo, County of San Mateo, State of California, by and between the City Of San Mateo, a municipal corporation, hereinafter called "City," and hereinafter called "Contractor," as of the day of , 2010. RECITALS: (a) City has taken appropriate proceedings to authorize construction of the public work and improvements or other matters herein provided, and execution of this contract. (b) A notice was duly published for bids for the contract for the improvement hereinafter described. (c) After notice duly given, on the date hereof, the City awarded the contract for the construction of the improvements hereinafter described to Contractor. IT IS AGREED, as follows: I. Scope of Work. Contractor shall perform the work according to the Contract Book therefore entitled: BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 2. Contract Price. City shall pay, the Contractor shall accept, in full payment for the work above agreed to be done the sum of Said price is determined by the prices contained in Contractor's bid, and shall be paid as described in the Contract Book. In the event work is performed or materials furnished in addition to or a reduction of those set forth in Contractor's bid and the specifications herein, such work and materials will be paid for as described in the Contract Book. 3. The Contract Documents. The complete contract consists of the following documents: This Agreement; the Notice Inviting Sealed Proposals; the Accepted Proposal; the Contract Book which includes the Special Provisions and Contract Plans, Addendums Number issued to the Contract Book, the APWA-AGC Standard Specifications for Public Works Construction, 2009 Edition; the Faithful Performance Bond, and the Labor and Material Bond. 1dJOBSVCSMTVI I-Bayfront_LeveeASpecifications\Final SubmittalAAppendicesAAppendix_IAoc A[_I All rights and obligations of City and Contractor are fully set forth and described in the contract documents. 1 I 1 1 1 1 1 1 All of the above -named documents are intended to cooperate, so that any work called for in one, and not mentioned in the other, or vice versa, is to be executed the same as if mentioned in all said documents. The documents comprising the complete contract will hereinafter be referred to as "the contract documents." In the event of any variation or discrepancy between any portion of this agreement and any portion of the other contract documents, this agreement shall prevail. The precedence of the remaining contract documents will be as specified in the Contract Book. 4. Schedule. All work shall be performed in accordance with the schedule provided pursuant to the Contract Book. 5. Performance by Sureties. In the event of any termination as hereinbefore provided, City shall immediately give written notice thereof to Contractor and Contractor's sureties, and the sureties shall have the right to take over and perform the agreement, provided, however, that if the sureties, within 5 days after giving them said notice of termination, do not give City written notice of their intention to take over the performance thereof within 5 days after notice to City of such election, City may take over the work and prosecute the same to completion, by contract or by any other method it may deem advisable, for the account, and at the expense of Contractor, and the sureties shall be liable to City for any excess cost or damages occasioned City thereby; and, in such event, City may, without liability for so doing, take possession of, and utilize in completing the work, such materials, appliances, plant and other property belonging to Contractor as may be on the site of the work and necessary therefor. 6. Legal Work Day - Penalties for Violation. Eight hours of labor shall constitute a legal day's work. Contractor shall not require more than 8 hours' labor in a day and 40 hours in a calendar week from any person employed by Contractor in the performance of such work unless such excess work is compensated for at not less than 1-1/2 times the basic rate of pay. Contractor shall forfeit as a penalty to City the sum of $25.00 for each laborer, workman or mechanic employed in the execution of this contract by Contractor, or by any subcontractor for each calendar day during which such laborer, workman or mechanic is required or permitted to labor more than 8 hours in any calendar day and 40 hours in any one calendar week in violation of the provisions of Sections 1810 and 1816, inclusive, of the Labor Code of the State of California. 7. Prevailing Wage Scale. In general, the prevailing wage scale, as determined by the Director of Industrial Relations of the State of California, in force on the day this bid was announced, will be the minimum paid to all craftsmen and laborers working on this project. In some cases, prevailing wage determinations have either a single asterisk (*) or double asterisks (**) after the expiration date in effect on the date of advertisement for bids. In cases where the prevailing wage determinations have a single asterisk (*) after the expiration date which are in effect on the date ofadvertisementfor bids, such determinations remain in effect for the life of the project. Prevailing wage determinations which have double asterisks (**) after the expiration date indicate that the basic hourly wage rate, overtime, and holiday pay rates, and employer payments to be paid for work performed after this date have J:vMRSVCSM1AI I-flayIront_LeveeASpecificationsWinal Submit ppendicesAAppendix_rdoc AI -2 1 1 1 1 1 1 1 1 been predetermined. If work is extended past this date, the new rate must be paid and should be incorporated in contracts the Contractor enters into. A copy of the correct determination will be posted at the job site. It is understood that it is the responsibility of the bidder to determine the correct scale. The City will keep a copy of the wage scale in the City Clerk's office for the convenience of bidders. Any errors or defects in the materials in the City Clerk's office will not excuse a bidder's failure to comply with the actual scale then in force. 8. Insurance. The Contractor shall provide and maintain: A. Commercial General Liability Insurance, occurrence form, with a limit of not less than $5,000,000 each occurrence. If such insurance contains a general aggregate limit, it shall apply separately to this Agreement or be no less than two (2) times the occurrence limit. Automobile Liability Insurance, occurrence form, with a limit of not less than $1,000,000 each occurrence. Such insurance shall include coverage for owned, hired, and non -owned automobiles. C. Workers Compensation in at least the minimum statutory limits. D. General Provisions for all insurance. All insurance shall: Include the City of San Mateo, its elected and appointed officers, employees, and volunteers as additional insureds with respect to this Agreement and the performance of services in this Agreement. The coverage shall contain no special limitations on the scope of its protection to the above -designated insureds. ii. Be primary with respect to any insurance or self-insurance programs of City, its officers, employees, and volunteers. iii. Be evidenced, prior to commencement of services, by properly executed policy endorsements in addition to a certificate of insurance. iv. No changes in insurance may be made without the written approval of the City Attorney's office. 9. Hold Harmless and Indemnity Provision. Contractor agrees (I) to hold harmless and indemnify City of San Mateo and its officers and employees from and against any and all claims, loss, liability, damage, and expense arising from performance of this contract, including claims, loss, liability, damage, and expense caused or claimed to be caused by passive negligence of City of San Mateo, its officers or employees, and (2) to defend City of San Mateo, its officers or employees thereagainst; provided, however that this provision does not apply to claims, loss, liability, damage or expense arising from (a) the sole negligence or willful misconduct of City of San Mateo or (b) the active negligence of City of San Mateo; further provided, that this provision 1:\JOBS\CSMT11 l-Bayfrom_Levice\Spccifications\Final Submittal\ Appendices\ Appendix j.doe AI -3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 shall not affect the validity of any insurance contract, workers compensation or agreement issued by an admitted insurer as defined by the Insurance Code. 10. Attorney Fees. Attorney fees in amount not exceeding $85 per hour per attorney, and in total amount not exceeding $5,000 shall be recoverable as costs (that is, by the filing of a cost bill) by prevailing party in any action or actions to enforce the provisions of this contract. The above $5,000 limit is the total of attorney fees recoverable whether in the trial court, appellate court, or otherwise, and regardless of the number of attorneys, trials, appeals or actions. It is the intent that neither party to this contract shall have to pay the other more than $5,000 for attorney fees arising out of an action, or actions, to enforce the provisions of this contract. The parties expect and hope there will be no litigation and that any differences will be resolved amicably. 11. Mediation. Should any dispute arise out of this Agreement, any party may request that it be submitted to mediation. The parties shall meet in mediation within 30 days of a request. The mediator shall be agreed to by the mediating parties; in the absence of an agreement, the parties shall each submit one name from mediators listed by either the American Arbitration Association, the California State Board of Mediation and Conciliation, or other agreed -upon service. The mediator shall be selected by a "blindfolded" process. The cost of mediation shall be bome equally by the parties. Neither party shall be deemed the prevailing party. No party shall be permitted to file a legal action without first meeting in mediation and making a good faith attempt to reach a mediated settlement. The mediation process, once commenced by a meeting with the mediator, shall last until agreement is reached by the parties but not more than 60 days, unless the maximum time is extended by the parties. 12. Arbitration. After mediation above, and upon agreement of the parties, any dispute arising out of or relating to this agreement may be settled by arbitration in accordance with the Construction Industry Rules of the American Arbitration Association, and judgment upon the award rendered by the arbitrators may be entered in any court having jurisdiction thereof. The costs of arbitration shall be borne equally by the parties. 13. Provisions Cumulative. The provisions of this agreement are cumulative, and in addition to and not in limitation of, any other rights or remedies available to City. 14. Notices. All notices shall be in writing, and delivered in person or transmitted by certified mail, postage prepaid. Notices required to be given to City shall be addressed as follows: Director of Public Works City of San Mateo 330 West 20th Avenue San Mateo, CA 94403 Notices required to be given to Contractor shall be addressed as appears in the signature block as shown on the Bidder's Statement. JAMBS \CSM7V 1-Bayfron[_Levee\Specifieations\Finat Submittal \Appendices\Appcndix_1.doc AI -4 1 1 11 1 1 1 15. Interpretation. As used herein any gender includes each other gender, the singular includes the plural and vice versa. IN WITNESS WHEREOF, this agreement has been duly executed by the parties hereinabove named, as of the day and year first above written. CONTRACTOR CITY OF SAN MATEO, a municipal corporation By: MAYOR ATTEST: (Typed name of Person Signing) CITY CLERK J:J0115VCSMTI I-Rayfmn[_LeveeASpecifications\Final SubmittalAAppcndicesVAppendix_l.doc AI -5 APPENDIX II 1 1 1 1 1 t 1 1 BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT CITY PROJECT NO. 468301-46000-0553 Figure 1 Construction and Staging Areas for San Mateo Creek Site Figure 2 Construction and Staging Areas for Detroit Drive Site Figure 3 Construction and Staging Areas for Seal Slough Site Figure 4 Construction and Staging Areas for East End Levee Site Figure 5 Pre -Approved Staging, Storage and Stockpile Area Figure 6 Pre -Approved Truck Haul Routes 1:UOBSVCSMTVI I-Bayfront_Levee\ SpeeifcrtionsTinal SubmittalAppendiees'Appendix_➢.doe All -I 1 1 1 1 1 1 I 1 1 1 PARKING LOT TO REMAIN OPEN TO PUBLIC DURING CONSTRUCTIONT DO NOT BLOCK PUBLIC ACCESS TO PARKING LOT NOTE SEETRAFFICDETOUR PLANS FOR PEDESTRIAN AND BICYCLIST ROUTING DURING CONSTRUCTION I Figure 1 Schaaf & Wheeler Figure 2 1 1 1 I 1 1 1 1 I 1 SEAL POINT PARK CONSTRUCTION ACCESS O cc O NO STAGING OR STOCKPILING ATE SEE TRAFFIC DETOUR PLANS FOR PEDESTRIAN AND BICYCLIST ROUTING DURING CONSTRUCTION SAN FRANCISCO BAY FLOODWALL #6 STAGING AREA (NO STOCKPILING) FLOODWALL ®6 CONSTRUCTION AREA (NO STOCKPILING) NO STAGING OR STOCKPILING ON BRIDGE Schaaf & Wheeler 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 NO CONSTRUCTION VEHICLE -, PARKING ON DETROIT DRIVE, MAINTAIN ACCESS FOR THRU TRAFFIC. Figure 3 Schaaf' Wheeler ® a a a a a a®® a® w a®® EN®° J. HART CLINTON bRIVE BAYSIDE JOINVILLE PARK/ CONSTRUCTION ACCESS 'EXISTING UTILITIES, PROTECT IN PLACE' Figure 4 Schaaf &' Wheeler Figure 5 I I I I I I I I I 1 1 1 1 1 1 I Schaaf Wheeler Ore-Approyedy,_°y"s ;t Storage; SSockpile wand Staging Aie$ i 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Truck Routes •••• Future Truck Routes r7' Commercial Areas s Manufarnnnngserees EIM hospital Areas ii Fairgrounds APPENDIX III I 1 1 1 1 1 1 SAMPLE TRAFFIC/BUSINESS DISRUPTION NOTICE [Contractor's Name] [Contractor's Address/ PROJECT SPONSOR: City of San Mateo PROJECT NAME: BAYFRONT LEVEE IMPROVEMENTS SAN MATEO CREEK TO FOSTER CITY LIMIT Project No. 468301-46000-0553 48 HOUR NOTICE [Date of Notice] The City of San Mateo has hired us to rehabilitate and improve the Bayfront levee system from San Mateo Creek south to the Foster City limit. On [date work to begin], we will begin work to [description of work that requires notice] at [location(s) of work to take place]. This work will involve disruptions to local traffic patterns and will result in short-term loss of parking spaces in some construction areas. These disruptions should be short term. In the event of an emergency, call [contractor's project superintendent] at [contractor's emergency telephone number]. Thank you in advance for your patience and cooperation. [Contractor's Name] emergency telephone number]. kVOBSVCSM7U1-Bayfront LevecASpecificatimrc\Final Submittal AAppendices VAppendix_[U.doc Alibi ® i — — aim ® _ am Ns um a a ® mu — a al is