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Amendment No 11
James A Cummings, In 3575 Northwest 53rd Stre€ Fort Lauderdale FL 33309 I umminas General Contractors MEMORANDOM TO Paul Abbott FROM Alex Smith Jr Phone 954 733-4211 Fax 954-485 9688 Website wwwjamesacummings com SUBJECT Village of Key iscayne Civic Center Amendment 11 — Installation of Existing Sheet Piling an Additional and Associated Work for the Village Community Center DATE November 24, 2003 Transmitted are five (5) copies of GMP Amendment No 11 for Installation of Existing Sheet Piling an Additional and Associated Work for the Village Community Center executed by James A Cummings, Inc Please forward these documents to the Village Clerk with instructions for signature by the Village Manager & Attorney as this amendment has been approved by the Village Council Please return Two (2) copies to the James A Cummings, Inc Jobsite Office Thank you for your attention in this matter If there are any questions and/or concerns regarding this matter please do not hesitate in contacting this office at (305) 361-9227 for discussion cc FILE AMENDMENT TO AGREEMENT BETWEEN OWNER AND CONSTRUCTION MANAGER PROJECT NO PROJECT NAME AND LOCATION AMENDMENT NUMBER VKB-98069000 Village Community Center (Recreation Center) Village Fire Station, Police Station, and Administrative Office of the Village of Key Biscayne, Flonda (the "Project") #11 (Installation of Existing Sheet Piling an Additional 42" and Associated Work for the Village Community Center ) THIS AMENDMENT made this 15th Day of July in the year Two Thousand and Three By and between the Village of Key Biscayne, Flonda, a Flonda municipality, (the "Owner") and James A Cummings, Inc a Flonda Corporation 3575 Northwest 53rd Street Ft Lauderdale, FL 33309 Phone (954) 733-4211, Fax (954) 485-9688, (the "Construction Manager") Federal Tax I D Number 59-2098732, WHEREAS, the Owner (as a direct signatory and through its former agent, the Department of Management Services of the State of Florida (the "DMS")) has previously entered into the Agreement between the Owner and Construction Manager, and WHEREAS, the Agreement has previously been revised by Amendment Nos 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, WHEREAS, it is now necessary to revise the Agreement to include Work Associated with Installation of Existing Sheet Piling an Additional 42" as indicated in Field Change Order No 1 dated May 29, 2003 for the Village Community Center NOW, THEREFORE, in recognition of the good and valuable consideration provided by the covenants hereof between the parties, the Owner and the Construction Manager hereby covenant and agree to amend the Agreement to include work for the Owner directed changes for the Village Community Center and to identify its funding source, to identify the drawings, specifications and other documents upon which the GMP is based, and to otherwise revise the Agreement, as follows (1) Guaranteed Maximum Price — the Guaranteed Maximum Pnce (GMP) for construction of Project VKB-98069000, Village Community Center, Village Fire Station, Village Police Station and Administrative Office of the Village, as defined in Article 7 1 of said Agreement shall be $21,337,166 59 (which includes the $55,265 00 GMP for the Work Asociated with the Installation of Existing Sheet Piling an Additional 42" as listed below in item 2 a for the Village Community Center) (2) Drawings and Other Supporting Documents — in addition to the drawings, specifications and other supporting documents identified in previous amendments (No 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10) to the Agreement, the Guaranteed Maximum Price (GMP) for construction of the Project, is based upon the following drawings and other supporting documents a Proposal #R -04C (Revision No 1) to the Village of Key Biscayne from James A Cummings, Inc , dated July 15, 2003, and as directed by the Village of Key Biscayne in accordance with Field Change Order No 1, dated May 29, 2003 which are attached hereto as Exhibit "A " b The revised Project Budget, which is attached hereto as Exhibit "B " (3) Changes in Agreement — various changes are required to the exhibits and articles of the Agreement to reflect the amendments descnbed herein It is agreed that the articles and exhibits of the Agreement shall be deemed to be amended, to provide the following a Establishment of the GMP for Work Associated with Installation of Existing Sheet Piling an Additional 42" for the Village Community Center in the amount of $56,265 00, and establishment of the GMP for the Project of $21,337,166 59 (4) Effect On Agreement - except as provided above, the articles and exhibits of the Agreement which are not affected by the amendments provided for herein shall remain in full force and effect IN WI FNESS WHEREOF the parties have executed this Amendment the day and year first written above JAMES A CUMMINGS, INC Attest BY tactyvv‘A_Act... /COLLLO Corporate Secretary Witnessed By By (print name) CA/LA-- William R Derrer, Corporate President James A Cummings, Inc VILLAGE OF KEY BISCAYNE Approved as to form and lega sufficiency By Village Attorney 103001 \agreements\amendment to agreement between owner and construction manager 2 (Corporate Seal) EXHIBIT B OWNER S CONSTRUCTION BUDGET ITEM DESCRIPTION CONSTRUCTION BUDGET CONSTRUCTION MANAGER S PRECONSTRUCTION PHASE FEE $113 190 00 SUBTOTAL OWNER S TOTAL PRECONSTRUCTION PHASF FEE $113 190 00 VILLAGE FIRE RESCUE DEPARTMENT & ADMINISTRATION AND POLICE FACILITY CONSTRUCTION MANAGER S CONSTRUCTION PHASE FEE $527 392 00 CONSTRUCTION MANAGER S OVERHEAD & PROFIT $457 223 00 CONSTRUCTION BUDGET BALANCE $9 862 250 00 AMENDMENT NO 09 - OWNER REQUESTED CHANGES $232 893 00 SUBTOTAL CONSTRUCTION COSTS $11 079 758 00 ANTICIPATED OWNER SALES TAX SAVINGS ($159 266 00) SUBTOTAL $10 920 492 00 OWNER S CONTINGENCY $256 924 00 OWNER S GMP BUDGET FIRE RESCUE & ADMINISTRATION/POLICE $11 177 416 00 OWNER S CONSTRUCTION BUDGET FIRE RESCUE & ADMINISTRATION/POLICE WITH PRECONSTRUCTION FEE $11,290,606 00 VILLAGE CIVIC CENTER SITE & SITE INFRASTRUCTURE WORK ELECTRICAL DUCT BANK AND WATER MAIN CONSTRUCTION MANAGER S CONSTRUCTION PHASE FEE $119 226 00 CONSTRUCTION MANAGER S OVERHEAD & PROFIT $34 521 00 CONSTRUCTION BUDGET BALANCE $647 913 00 OWNER S CONSTRUCTION BUDGET VILLAGE CIVIC CENTER SITE & SITE INFRASTRUCTURE WORK ELECTRICAL DUCT BANK AND WATER MAIN $801,660 00 VILLAGE CIVIC CENTER SITE & SITE INFRASTRUCTURE WORK PHASES 1, 2, 3 & 5 (INCLUDING STATE SCHOOL FF SANITARY SEWER FORCE MAIN) CONSTRUCTION MANAGER S CONSTRUCTION PHASE FEE $62 630 00 CONSTRUCTION MANAGER S OVERHEAD & PROFIT $67 483 00 CONSTRUCTION BUDGET BALANCE $1 459 011 00 OWNER S CONSTRUCTION BUDGET VILLAGE CIVIC CENTER SITE & SITE INFRASTRUCTURE WORK $1,589,124 00 VILLAGE COMMUNITY CENTER (RECREATION CENTER) CONSTRUCTION MANAGER S CONSTRUCTION PHASE FEE $564 455 00 CONSTRUCTION MANAGERS OVERHEAD & PROFIT $425 213 00 CONSTRUCTION BUDGET BAI ANCE $8 925 310 00 OWNER S CONSTRUCTION BUDGET VILI AGE COMMUNITY CENTER (RECREATION CENTER) $9,914,978 00 EXHIBIT B (cont d ) OWNER S CONSTRUCTION BUDGET OWNER CHANGE ORDERS OWNER CHANGE ORDER NO 1 ($1 140 899 62) OWNER CHANGE ORDER NO 2 ($1 118 301 79) SUBTOTAL OWNER S CHANGE ORDERS ($2,259,201 41) OWNER S TOTAL CONSTRUCTION BUDGET (ALL PHASES) $21 337 166 59 Cummira9 s Genera Contractors July 15 2003 SKYLIN NILNAGEMENT GROUP INC 88 West McIntyre Street Key Biscayne, FL 33149 James A Cummings, inr 3575 Northwest 53rd Stree Fort Lauderdale FL 33309 Phone 954 733-4211 Fax 954-485 9688 VVebsrte www famesacurnmmgs corn TRANSMITTED VIA HAND DELIVERY ATTN Mr Paul Abbott, Project Director RE KEY BISCAYNE CIVIC CENTER REQUEST FOR CHANGE ORDER REVISED PROPOSAL #R -04C INSTALL EXISTING SHEET PILING ADDITIONAL 3'-6" Dear Mr Abbott, James A Cummings, Inc is submitting Proposal #R -04C, (revision #1) in the amount of $56 265 00 This proposal incorporates Additional Work for installing the existing sheet piling located on the North, South East and West perimeter of the Community Center Excavation an additional 3'-6 as directed by the Village of Key Biscayne Field Change Order No 1 dated May 29, 2003 Please see attached summary form and subcontractor quotations for a recapitulation of this Work The Work indicated in this Request for Change Order has been completed by James A Cummings Inc andlor its subcontractors at the direction of the Village of Key Biscayne to mitigate construction schedule impacts This Work is only a portion of that described in Field Change Order No 1, due to the issuance of Village of Key Biscayne Field Change Order No 2 Pursuant to our meeting on July 10, 2003, this Proposal #R -04C (Rev 1) shall be incorporated into Amendment No 11 of the Agreement Between the Owner and Construction Manager If there are any questions andlor concerns regarding this matter please do not hesitate in contacting this office at (305) 361-9227 for discussion Sincerely, JAMES A MMINGS, INC Al der Smith Jr P ect Manager Cc Rick Derrer J 4C Rob Maphis J 4C Todd Hotferberth VkBRDD Jose Aguila Robert Curne Partnership FILE James A Cummings Inc Proposal Summary Form Village of Key Biscayne R -04C (Rev 1) Install Existing Sheet Piling an Additional 3 6 1 C, ,. um m r nos HUTh SECTION DESCRIPTION OF WORK _ LABOR MATERIAL SUBCONTRACT 1 02 Metro Engineering Contractors Inc Mobilize Equipment for providing Temporary Road along North South East & West Perimeter for Crane on Interior of Excavation $7 200 02 Formworks Inc Gnffin Dewatering Inc Removal and Re -installation of Apprx 800 LF of Manifold Line located @ All Penmeter Walls of Excavation $9 1091 02 HJ Foundation Mobilize Pile Dnving Equipment and Personnel to Install All Existing Sheet Piling Additional 42" Install Additional Sheet Piling @ Southeast Corner of Excavation for Existing FPL Ductbank $37 000' 1 --- , --I SUBTOTAL LABOR BURDEN SALES TAX SUBTOTAL TOTAL OVERHEAD (4 5%) SUBTOTAL PROFIT (Included in Overhead above) SUBTOTAL BOND TOTAL 1 so' so' 1 $53 3091 $0 00 $o $o $o $53 309 _ $53 309 $2 399 $55 708 N/A $55 708 $557 $56 265 07/15/2003 i (954) 792 9260 Di NI LL M Q' Q a C4 OD N.. c, v 0 C 0 ti le en mg Tf Z. R o sec Ir- N 7 A O Ct _c O m h 44 II .4111 "40"4" tal i 7r 16i Nu/ METRO ENGINEERING CONTRACTORS, INC \L i 1 1\+�.5 A cr Mtii1\GS INC )) /5 VA, 53 d TREFT 1 t LaudcrdkkL 1 L 3330g 1U'1-161 9227'1 AX 305-361 5647 Attc.ation ALEX SMr111 RF VII I AC.F OF KF% R!SCAYNF RFC C LIN I Lit T)FSC R TPT1ON PROPOSAL RECEIVED MAY 0 8 2003 James A Curnmirgs Inc Key Biscayne Cppc Center AMOUN 1 To build temp Lrune read & remove road after ci ane I)Tobuild roul 980 Lo tdLr ompictor 2) Re.rnove road 9R0 Louie! 241iriu)S 125 00 S3 000 00 16hrt(a)S75 00 S1 200 00 24hrs( S 125 00 $1,000 00 TOTAT S7 20(1 00 tit "1 Rte F NG4N E - F R NC; CONTRACTORS INC IS A CERTIFIED BLAC. K MINORITY CCRPORATION FORM WORKS, INC 4951 SW 34 Place Ft Lauderdale FI 33314 Date 5/29/03 Attention Alex Smith Addressed �o James A Cummings 3575 NW 53 St Ft Lauderdale FI 33309 Phone 954)587 0530 Fax 554 �d RCL $ 4 Jobsite Key Biscayne Rec Center Tc<e #s We hereby request an increase in our Contract for the Amount of $71 156 for the following Second Dewatering Reconfiqurratlon Item Qty Unit Rate Sub Total Tax Ins Fnnge Fnnge Total 13% 24% Rate Amount Gnffin letter dated 5/29/03 Sincerely Steve Binford 1 00 • G61 170 00 $61 17 561 179 '7 SS?,L- Total 561179 -7 ^ Sub Total 561 179 10% Overhead 56118 (3" Sub Total t- 5% Profit Sub Total r c C, 0 70% Bond Total 74486-- ` r -I RECEIVE' MAY 3 0 003 James A Cummings Inc Key Biscayne Civic Center %11v 30 103 1'1 0, RECEIVED watc.Feet> ng_..__ MAY30 2r,3 James A Cum r i-c Key Biscayne C! �rC��tcr FORMWORKS 4951 S W 34ni PLACE FT LAUDERDALE, F.OP r A 33314 ATTENTION STEVE BLNEORD SUBJEC r ADDITIONAL WORK FOR KEY BISCAYNE REC CENTER DEWATERING Dear Steve GRIFFIN �nit n Dtwatei Ag 5cut? ar1a L 1321NN 1 NAde Pomi..ano 9each "oV1da 33069 PlIcne (9541 X163-da54 F-1)1(954) 9624173 5-29-03 Per Langan Engineenng s recommendations we have prepared a proposal for services This proposal inc'udes the work previously ordered and the new work as we have been directed Our understanding of this work is as follows 1- Remove and reinstall the entire wellpoint manifold line (880) This work should be completed today PeM >i-4- AQLef--safne-o the-ems--side-ef qtr-et-dev enr}v-sy cm dtseharge-(tnta — 3ettltng tank} Pnczng is as follows 1- $7 832 2 $4 4,$92 for labor tiuckmg etc @-$-S 9©6 40 -tax included- iffb--� 01,.t.,, - tided ---43 3 Tpts $428--- tacrud 3 •loo..r..ffrA3 i? r'AcAti -. -' We hope the• thi, is the ,n fo; mat, n required Please contact �ne should o Ep.restton� � ,--Y, , r.� . sY u hatic Very Truly Yours David Handy e++t�---�'!�-ta..-..e►.i-,t4/ ��/-�'-mart -- ��r�► e/ .4- C �. .), I c. CD FOUNDATION , Vav 29 2003 James A Cumrnir gs Inc 3575 NW 53rd Street Ft Lauderdale FL 33309 Attention Mr Alex Smith Subject Key Biscayne Recreational Center Temporary Steel Sheet Piling Gentlemen We propose to furnish all labor, equipment, and material to install temporary steel sheet piling and drive down the existing shoring walls previously installed for the above -referenced project Specifically, our scope of work will include the following 1 Mobilize pile drivirg equipment and personnel to the jobsite 2 Drive down all the existing shoring walls flush with the elevation of the exterior grade 3 Install an additional 16 wall feet of temporary sheet piling to a depth of 25 feet below the exterior grade We understand that the work will be performed from inside the excavation This area must be flattened and raised to an elevation of at least one foot above the water table We wi 1 oerfor-n Lrle worA. descr bed above for the lump sure of $37 000 00 8510 VW 68 St to 11 am F 3 156 P (3051 54Z 8181 8661 75 4 45 F (3151 59Z 7841 i • RECEIVED MAY 2 9 2003 James' A Cummings Inc a w"rwO O��LJ aipre C1vtc Center Ur' * RaLes 1 Stardbi, t ire if the war', car not be performed in a contiruous manner per tour $400 00 2 Remobil ze to the site if required per mobilization $7 000 00 Vibratory pile installation equipment will be r( quired to install the sheet piling for this project We cannot be responsible for damage, of any kind whatsoever, to adjacent structures or utilities which may occur during, or as a result of, the installation of the sheet piling The above prices are based on the following being furnished or performed by others 1 Clear access for a 16 -foot wide crane to each work area with a reasonably level working grade 2 Continuous work in an uninterrupted sequence 3 Baseline survey and layout 4 Location and protection or removal of any conflictir g utilities or structures 5 Pre -construction surveys of existing structures 6 Vibration or settlement monitoring of existing structures 7 Engineering design of earth retention wills 8 Payrnent in full within 30 days after completion of our portion of the work Thank you for giving us the opportunity to quote on this project Please feel free to contact us if we can furnish any additional information Very truly yours HJ FOUNDATION INC Emilio R Venegas Project Manager RECEIVED MAY 2 9 2003 nrres A Cummings Inc 'ey Biscayne Civtc Center FIELD CHANGE ORDER PROJECT `illage of keti BiSCJ%ne Cornmunitti C enter TO CONTRACTOR James A Cummings, Inc DIRECTI\ E NO D1TE N, KB PROJECT NO CONTRACT DXTE CONTRACT FOR 001 May 29, 2003 VKB-98069000 GIMP -- Oct 17, 2002 General Construction 1 ou are hereby directed to incorporate the following change to the contract ' f k2 `Th<S C' t3' t 12 vs1 b., i41P40. �-' N1 C,7 cl..)-12—ALt - -"t 'GJ z,z 3 /-t--�� --lam--j c, -r I� �- -3 C ,-t 1 tom. :LrL� P-167 `t t2A it St..` pLC uIYI r -S 3 J t:, - L 2. G✓3 5 z3 - c_D 3 vAA t i i TN C`i Pt L-1.3" S�cat.�L_.�a.-r ti c s-.� !�-t--� I ,�-- ANTICIPATED ADJUSTMENTS 1 The proposed basis of adjustment to the Guaranteed Maximum Price is Lump Sum (increase) (decrease) of S c Unit Price of S ci As provided in Subparagraph 10 1 3 of Agreement between Owner and Construction Manager As follows (-: tZ. Ca 9 c 2 The Contract Time is proposed to —rL--P J 41„-ahe proposed adjustment of T-&tr °=TCR.M 114114 %%hen signed by the Owner and Contractor, this document becomes effective IMMEDIATELY as a FIELD CHANGE ORDER, and the Contractor shall proceed with the change described abo‘, e Village of Kev BtsLa`rie O % ER 89 West M1cInt re Street ADDRESS Ke" Biscati BY DAT F onda 33149 Sk" line Manaizemegt Group O%%"IER Ice r 89 \ti est \!t.Intw rL Street kDDRE S ke` Bisca.ne Florid t 33149 -(L Signature by the Contractor indicates the Contractor s agreement with the proposed adjustments in Contract Sum and Contract Time set torth in this Field Change Order James A Cummings Inc CONTRACTOR 3575 N V 53 d Street tDDRE� Ft Lauderdale Florida 3i309 Br D \ FES C I \SS \ PLR\II I I OR 1 1 E\IPOR \R� -DE VVAT E RIA-4s PR 4T EC-F- [SSL ED TO Issued by Miami -Dade County Department of Environmental Resources Management Rater Management Division 33 S `% 2nd Avenue Miami Florida 33130 Phone # 372 6681 A COPY OF THIS PERMIT MUST BE KEPT ON SITE AT ALL TIMES (REFER TO CONDITION #2 OF THIS PERMIT) YOU ARE TO NOTIFY THIS DEP - RT\LENT B Y C ALLL\ G THE COMPLAL\T DESK OF THE COMPLIANCE SECTION AT (305) 372 6955 ANiD ROSS `ti ILCOY AT (305) 372-6870 AT A IiiL�,�;Ly4UM OF FORT' EIGHT (48) HOURS PRIOR TO CO\L\t NCEtitE\T OF 4\Y DISCHARGE THE APPROPRIATE DERM LNSPECTOR ILL BE AD\ ISED OF YOUR PROJECT START UP AT THAT TLME \Iianu Dade CountN, Class ` Des.%attr►ng 1'irmit \r� L-'( StartingDate 5f or P Q3 Et iration Date Issuance Date o3 -I e�a� 103 CL 'TOR 1 T ETV RJR `r DE`\ ATERL'\G PRO ECT IS -SLED Pr D E r TA -E- \-T--A-F-E-N-V-Z OAT- \ T krr- -ES et -RC ES \ Av €AtE-N T \A, TER 1[AN AGE`f\T Dr\ ES YON This Pear,. and furtbe (a) Nam o P _ P Cort Li T_. r`t, t)r _ r IJ tL.r a ..TplrLr Ve�L a e�^`, pro E- r i r vJ a l.i� �LV 11",_ m..de i ^ tC t De •-, ,- `t o and Tv2c. t� r beLsedt,� Village of Key Biscayne Community Center Temporary Drawdown of groundwater for excavation for structure construction Sediment Tanks (s), Sheet prlrngs to elevation of -20', Series of well point systems (B) Location of Dewatenng Site - West McIntyre Street, Village of Key Biscayne Florida (C) Location of Discharge Point to Vv ater Body and Name of u ater Body - Village of Key Biscayne (D) Permittee Name address and phone number of contractor viho \Nill perform the work Flame and phone number ot on site contact person - Formworks Contact Steve Binford (305) 949-1231 4951 SW 34 Place Ft Lauderdale, FL 33314 (E) Performance Bond This N/A permit shall require the posting of a performance bond of (F) General Permit Conditions This perrut is issued subject to the following general permit conditions 1 Subsequent. to ' our permit be ng issLod dou are req,..ired to corLact this ofttLe as follows al Bti �aiitng t-te \` ater Control Section at 372-6681 a minimum of one (1) weer. bc,tonc the c0TLnenLement of dev.ltenng in order to arrange a pre work conference b) B� Len no. t,L. t for LO the `\v ILZr Con\lot Sector of Dade Coanty Depart -rte. -it ot En orr-,--1 li Resour..es Management (DERV) a mEri-num ot torki eiett (48) holt rfir t it Le the c li i s_ncert,.nt. ot dzr‘a.e~in� Failure to comp ‘A rn to a Cease and Destsr ord._ bL ng issued for 'our proJe.,t with subsequent e^ a'.c-t tor ron corrpiia^,.e S "e,, t2 7 Tl., ` -e Lo- l l 0" \.` ..- CL 11 r1 L. 1 r'c ^ • ',^L' - 1 V' 'oL'" l �` 1 ,_ r CL. •c' �c lA i 3 The r , 1,l ,'r L. 2c. "'"1 D 1 '.. 1 .. t ,o -L -o1 e ID e^ ( �� "l t Ir:s cur'avi c t� ) as ,I-10� '1 0^ I^e aL a� r,.d an^,o\.eli plan's pl lur Co v' ,0"' ^�, �*'� -l� of tic dev,are--i-'g operas or Sediment tank(s) and turbiditti barrier(s) shall be provided in sufficient numbers to insure that all denatering discharges satisfy the turbidity standards required for this project and as specified in Chapter 24 \Izami-Dade County Code }~ a 4 The perrnittee shall ensure that all turbidity control equipment as shov.n on the approved plans shall remain in place and be fully operational and effective at all times during the dew atenng operation 5 The turbidity at the point past which no further treatment is given shall not exceed 29 `TUs as per Section 24 II of the Metro Dade County Code The permittee shall be responsible to monitor the turbidity at this point by using a turbidity meter to insure compliance 6 If turbidity exceeds 29 iNTUs at the point at which no further treatment is given the permittee shall immediately CEASE -1ND DESIST from dewatenng to the water body and notify the Vvater Control Section of DER\I The permittee shall subrnit revised plans to DERM with additional or modified turbidity control equipment in order to comply with Dade County water quality standards It said plan is appros. ed by DERN,I or his designee the permittee may after installing or modifying this project in accordance witri the new approved plan proceed with the dewatenng The permittee shall continue to monitor his discharge to ensure that it complies with the limits as described herein 7 Upon completion of the dewatenng work authorized by this permit the permittee shall clean up the work site and restore any areas impacted by the work within the Bay or other affected water body to its condition prior to the commencement of the work covered by this permit This includes but is not limited to the removal of any fine sediments that have accumulated on the bottom of the water body and the removal of all pipelines sedimentation tanks sand bags turbidity curtains and their supporting pilings In the event that a publicly owned storm sewer system is used as a conveyance to the water body said conveyance system shall be cleaned to the satisfacrton of DERM of all sediment pror to the turbidity control sLruLrures In the aLer bedv being remol ed 8 The permit ee sh ell CEASE -A\D DESIST all de\vatenng. optrat ors co erect b‘. th,s pLrrnit it ordered to do so b 1 ui DERV has rig. 1 sa d d, '.a r'a uc.It"atlo 1 is viota Ira a cordic cr or soL,tat ,,ordic,cr et this pGri''i oi v}olat1n por,o-1 of Ile D County Eft I^onTertal P -u1.,. for Ord,n'ri,„ (Chapter 24 \.Iet~o Dade CoLr Codc) Tri, perrnitre,. sb 1 rot r`su-r., ' a- -or zed to do so b DERM or 1, 3 des _nee 9 This pc.• -T 1 wait bL `al d tot tr, t,rn re' cd docurre-t E( ens ors nu L, be < ar Lei b, DERV or ,`ti des granted ‘A 11 re..1..i e t`'e pa\,Tt^t Or an add ional pe-mir tee 10 toN.e, c odr'r'le^t,l i-isre,t,on costs ISnee. 1) Lt t^,� E�`�',xLe-s or i, 10 1 Lam` a F ^� ���t ��� L lh l ��� �~ l L`C �� .L. 7r� L u L. r D E \ ` r ^ r L l_1 l ~ r c, t ~ e. c ^ ~ .a c lit i I t~L L�e �.;�. r' \. L 1�e 1 LZt t 7 Lam' i I 1r 11 t .: 0, er) eril" �.. S1 » nth ; rc)1 ,\ [ tie 1[L..1He ,Lt. or t'ie \A or: L.L�be red by 'hi3 pe—rtr dot -,2 care ci th,. n) ct o Ion Wort. a) The placers e^ or a r_caral rprac (1 to 3 teet in diameter) along the shoreline adjacent to the discharge point For each thirty (30) days or dzwatenng fi'e (5) cubic, yards of nprap shall be placed b) 1 cash contnbution to the Biscayne Bav Environmental Enhancement Trust Fund at the rate of $40/cubic yard or nprap equivalent to the volume required by (a) above 12 Agencies other than the Department of Environmental Resources Management from which approval may be necessary (as checked) State of Florida Department of Transportation Dade County Public `'orks Department for use of explosives Dade County Building and Zoning Department U S Army Corps of Engineers State of Florida Department of Environmental Protection State of Flonda Department of Natural Resources City of South Flonda Water Management District U S Environmental Protection Agency (G) Special Permit Condition 1 The maximum discharge into the drainage system along Fernwood Road, shall not exceed 500 g p m at any time -pplicant shall maintain an open pedestrian sidewalk and provide ramps if necessary over any pipes associates with this permit 3 Dew atering shall be conducted v is w ell points with the use of flow exclusion (sheet piles) and a groundwater recharge system along the eastern and western sides of the dewatering area 4 Effluent discharge to surface vvattrs (e g in the event of a significant storm event etL ) shall not be allowed unless confirmatory sampling from the area to be dewatered (i e , static from existing well points or dv namic subject to not discharging to surface waters) demonstrates dissolved concentrations of ammontas below 0 5 ppm If ammonia above the aforementioned CTL is verified a groundwater treatment system is required for anv intended groundwater disposal to surface waters Comprehensive design calculations demonstrating the appropriateness of the treatment system on addressing the documented levels on ammonia shall be provided to the DERV for review and approval prior to implementatzon Sneer 4 5 i monitor n ,Lht tilt t )r tPt ifrutnt ) Lortanlina`'tN art it or beloss, establi•httf ( its in the reLo'tred groLndssartr Samples shall be obtained daik for the brat thrti class of dttis aterfn.z and «eekk ther,,after Please note that a reduction in the sarnpltn, frequtncs mas, be proposed to DER\I for approval based on the sample results 1na1tises tor volatile organic aromatics (\ 0 1s including \ITBE) polvcsLitc aromatiL h' drocarbons (P -1 -Is), ammonia arsenlL, and fecal conform are required a 24 hour turn for processing the samples is required Sample results shall be submitted to the DERtiI (via facsimile) upon receipt 6 If at anti time the effluent goals are exceeded (i e , CTLs specified in Chapter 62-777 and Chapter 62-302, Florida Administrative Code (F4C) and Chapter 24, the Miami -Dade County Environmental Protection Ordinance, or anti other more stringent standards applicable at the site), the des% atering activities must be immediately ceased and the DERM notified Continuation of the devvatering shall be subject to the review and approval by the DERN! of a modification plan addressing the contamination encountered 7 In addition to the monitoring schedule described in item 5 above, background samples from the excavation site area for fecal conform, and ammonia shall be obtained at least 2 days prior to starting anv devvatering operation Samples results shall be submitted to the DERN,I (via facsimile) upon receipt q p 6 - - ♦ V S ; re-' S- i lez! a -t4 D �o e� -t -e,c'ce Ct (Co -c ac or) T -` COV A TCR IS A CORFOAT(0\ A ZEST m-hrfo Secre: j-,, D ATE S rCN DzT7: i/1j2 S /A -/C (Cor-ect \a." of C orJoracco-t) (1 rCorora_Sea') L b eYecced^ or c ? ee. a -d -?� """" •_ 1-'_:.L. 3 L. l J INFORMATION 1I NOTICE REG 1RDI\G DENA 1TERI\G OPERATIONS 1%RICH REQI IRE THE DISCHARGE OF I , VIERS INTO A FRESH\% ATER BOD1 OR BISCA1 \E BAS OR 1\1 STORNI SEW ER LE 1DI\G I\TO 1 SL RF 10E %% -1TER OR BISCA1 \E B -Y I am requesLing vour cooperaL'on in our program to control cons ruction site de\tiarennJ in order to better protect natural and manmade eater bodies in Dade County Our goal is to allow construction activities to proceed on schedule by advising permit applicants on the necessary measures to control turbidity prior to the commencement. of construction It is suggested that the following guidelines and attached list of general conditions which are made a part of every issued dew atenng permit be disseminated among your staff to ensure that the proposed discharge of turbid w ater from construction sites and utility trenches is properly planned and designed to comply with County standards The following guidelines and requirements are to be applied for anv construction activity which requires dewatenng into a freshwater body or Biscayne Bav, or any storm sewer leading into a surface water or Biscayne Bav 1 A well point system for dewatenng should be used as the preferred form of dewatenng whenever possible If a well point system is not feasible then adequate measures for the reduction of turbidity should be used in the following order of pnonty a) Pumping into an excavation within the construction site which is separated from the work area b) Pumping into a sedimentation (settling) pond outside of the construction site if arrangements can be made with the owner of an adjacent vacant lot c) Pumping into a sedimentation tank Klondike box or similar sedimentation tank which should be sized to allow for an acceptable holding time to effectively reduce the turbidity level of the effluent The evaluation of proposed dewatenng operations will include the possible environmental effects on the receivirg waters w tth particular attenr on to i-rpacts on existing biologi.:al resources and water quality It should be noted that Btscavne Bav is cens,dered an environmentally sensitive area (a State Aquatic Preserve) wh1Lh warrants additional protection Therefore dewatenng operations proposing, to dts. barge d re..tk to Btscavne Bav v til be discouraged It alternative methods or dt5aarQc, loLdr(urs urn not t,.as, te a more ce a' en\idorrrencal eyatua on viii be required ar! addirtonal rriL1oatton r,easur,. ma' bL re,,essary 3 For any pro ,,_t etc;, t. c to cL \,ater e d (._ g tnroug'' a s cr^Z ya e into ary w ater body the City , of County , PubITL \\ or:s andor Building and Zoning Depar*rnents should amerd re. --.,,r apol'.,..t on p-o,.e�s tequirerrert tor tele aopl Lant to oatam a Class ` perr, t or" t`'e D ice Coin or En iron rental Resour..es Maria er^ert (DERM) 1 -r r t _ C F, LC L7 Lei 1...•_`.,t k 1 l L` C L.- 1 1 I, tOl L>~r Perrnit Duration Fees 6 day, or less days to 30 da\s 31 dais to 90 days s400 00 $300 00 $750 00 pc. ��1 1 , All dewatenng operations required in connection w ith a Remedial Action Plan (R AP) such as for the removal and replacement of an underground fuel tank and subsequent aquifer recovery through an air stripping tower or other means require the prior review and approval of the Storage Tank Remediation Section Other dewatenng in contaminated areas may required prior approval of the Pollution Prevention Division In general contaminated groundwater will not be allowed to be reintroduced into the aquifer without prior treatment Replacement of stormwater drainage in areas where a RAP is taking place requires special review and approval Lnder these circumstances storrnw ater runoff rnav have to be rerouted and disposed of outside of the existing contamination plume It is the intent of this Department to strictly enforce the provisions of all Class \' Dewatenng Permits Failure to obtain a permit or failure to comply with permit conditions will result in the issuance of a Cease and Desist Order by this Department Repeated violations or failure to Cease and Desist when so ordered shall result in the appropriate legal action V e appreciate your cooperation in this effort which will alleviate the need for enforcement -oriented responses to turbid discharges and which will also protect our valuable marine and freshwater resources It you have anv further questions or would care to discuss this matter further please contact Mr Manny Tobon P E Chief or the Water Control Section at (305) 372 6681 �fTms 1 � J 404: kMta 1 I L.r vd n 1 4 .ry %.1 n c 1,( kt r` FE. :X RE Results of Groundwater Modeling Studies Key Biscayne Recrealleo Center Key Biscayne, Florida Dea Paul This letter presents the results of our grourd vater modeling studies performed for the Key Biscayne Recreation Center General The grourdwa'er• modeling st.adies were perrotrred using the computer program MOCFLGVJ Subsurface conditions were extrapolated from the JReport cr Subsurface Soil Explorat on and r:rnrorhrira' Fnnr nn,rty WrinPrier 1 a94r 1 g 1 g1 m ci 21 A�r List 2G01 The ermeaoility (hyd, a.�llc, c -Jr idu.l.vt t) of fL uAdePiying aara was generic enerir ttr i r 1r4'i i r rr r I/I experence dnd tirough field testing presented in the Wingerer report A two -layered s fsterr was assurred in our analyses The layer cnaracterstics are provided below Stratum Descr p tor Ucper Said Assumed Per-neabtlities (ft / day) Elevat on Range el +5 to el -20 Lower Limestcre Below el -20 111111, Lateral ' Vertical 300 300 90 20u The excavation d rrensions are approxrnaLely 140 ft (east west) by 300 ft (ncr`h-south) Tre existirg site grade is apprcxrnate'y el +5 Grou-idwatei was ercountered between el +2 and aI +3 at the ske The proposed exca raticr penme`er is ringed with lrterlocked sreetpiies The sheets are general y 25 ft In lerg h and pere rate about 21'/2 ft (tip el -16 5 ft) Some 30 ft sheets ere a'ec irstailed There is gererraliy 21 to 4 ft cf sheetpile stick uo o.ar ci the ground The Irstalled deNatenng 9` stern ccnsrs s o' 195 1; Inch d ameter weilpor s spaced 4'12 ft on cer+er cn the ntericr side of the sheets The wel'points al a 2C ft icrg a -id exterd to abcu et 14 The 'cwe 3 ft of gyre tiel pQrlts are sl_t'ed pipe anc +,e upce 17 4 are so id rice For t."e g c.'td,va _r rice vve hive bat thst ;roLndv.a er cr the tr Ler c cf C 'c eI '- s 1 I ai'cr '� a dry e<ca /3t'c tC•o^'l c.;nd r.:,rt t 1 ay s u r Dews a e-? a,C Craltwn Ba.1 C: ^v �1v:. V' .. c.:e �!`3 rC ^; a v • •••••• - �.. pu—ce.�. C e y 3 f� '" ry Cya-. �.. a.. -,4.• 4 s fs eM r• r�? is Based cr s g cwrd',va er model w rtn `-e s±.eetci e t ps a et o 5 f- a grcu,dn,a e drawdowr Is tc 9 ft n ha c the sneetpiies and ret,rrirg tc staLic level within about 200 ft tc ft away from *le sheets Wtt,iv a zore cf ato,It 100 -t awe/ rrom the snee s tie drawd \vr is about 3 ft This drawdown could be further rrinir^ized if the penile+er sneets were driven t"e add do^ai 3/2 b 4 ft cf exist ng stick up Previous Service Station Faciltty Southeast of Project Site In he area of the previous Se -v ce S*a ion (530 Crandor 3ou'evard; to the scut -east cf t -e Recreation Certer site them is an exs irg dissolved -petroleum compound groundwater olurne near its northern and western bo.inda ies Tne plume corsists of Volatile Organic Aromatics (VOA), i e , MT3E (methyl-tert butyl ether) and BTEX (benzene toluene ethyloenzene and xylene), Polycyclic Aromatic Hydrocarbons (PAH') i e naphthalene 1 methylnaphtnalene and 2 m thiinaphthalene F'orioa-pe+roleum Residual Orgar cs (FL -PRO) and arsenic All these compounds are consistent with the former use cf the site as gasolire filling and repel s *ion This co^taminadon was documented in he 'Limited Contamination Assessment Repert (LCAR) da+ed 24 Jere 2002 and he Supplemental Limited Contamination Assessmer. Report (supclerientai LCAR) da'ed 12 November 2002 bi Properties Environmental Assessments and Remedration Inc In July 20C2 the source a ea of this plume (four underground scrag tanks (USTs) aid petrole..-n impacted sci'3' were removed trrr ft'e central and norhrvestern portions of tre Service Station site Tne site is currently iii trte State of Florida Fetro'eum Pre approval Cleanup Program We have evaluated rre hodclogies tc minimize re migration of the cortamirants cased an the dewater'ng ac Nities his includes 1) driving the existing excaiatior perimeter shee les t'e additional 3 A to 4 ft or stick uo such trat they consistertly pene,rate the underlying limestore 2) tie use of a secondary cortinement wall enveloping the wester, boundary of the premus Serace Sta icr site arc 3) Lnstallrrg a groundwater recharge ,ie` po nt system installed in this area to e-irject he purnoed erlue,t ate s back irtc t -e gro..nd to rririmize drawdow, Dnving the exlstirg snaatpllas 'he additional 3/ o 4 t o' exist rig s` c{ ur WCL d ass s' In recucne Lne drardowr. moat rc ha e a sigrticart imosc c- efrL " flows 7cr this case 4,ve es'ima4e tna' t"'e d•-atid`, r' ir1C3..7 W :tJid Ce Ci►'t"IriSbed tC aco.It 5 to r ImrrectareI, a c.Ird the sneetc ies GVit'in a zore cr 00 f a vai from tie s +he c aAd� r WOLid to reduced Po acc"` 2 a T"e g-c..^dria er /e r nL t� s-`a~i,, aoc.a 2:C lc 30C f aweI fir seep les Based - - e a La o --Is ra i ti u c s — sheet~{ s S e — as t"f3 Sa1Ca 3 Cr' ns n t: t`e .,"r? ' r limestone c^r..ld cro.'de a s Lc g la rc A 4` e ar* - cat: `- r r site i� T ^ a leg 3 - - xey ^ - tee`.„ Supple--•ert Ely rcrr ie-L3i S mc1l''y )13" As re".,ese `3.. a San""' ""`L." - r' c I T f — t _ i+ `a r --- n, V '1 S d ---r tr, ~.. s„c: --A- atiacber s —\fv' T` Il ') - aril 4"e s w'.-. —c- l,/i,' 1 is 10.1-3 ,-fir LrJT i Ga New uoing was ^stalled Into the open sarnplii; pens A ceris.al 'c pur'p was at -acne to t -e end ct the tLctng to purge tf'e sample polnh and facilitate collector ci the grourcitia'er samp es Pncr to idle on of the groundwater samo1es at the d'rec push Iccat,ons app 3x ma+e&/ 4 ga'lcns o water were purged frcr-T each sample po nt usirg ape Istart c pump Physical parameters (oH tenpe ature specifc conductance dissolved oxygen and turbidi y) of t''e groundwater we -e measured during purging to determine aquifer stabilization Add tionally tire groundwater samples were collected t^ `he area between tie western property boundary of the former service s atton and the sheetpiles for +re Recreation Certer excavat ors Tne sampling locations ere identified in the attached flgu a as DP1 DP2 and DP3 The direct push sampltrg points were installed by pushing a % tnct, outs de diameter 4-fr length screened s'eeve approx mateiy to a depth cf o -t ro 1C ft bls The sleeve was retracted to expose the screen and alrow grou-dwa er to infltra e The groundwa er samples we e collected as described above All groundwater samples were collected in laboratory provided certified pre cleaned sample contatrers s o ec ti ice-filec coolers and transpor*ed to US Btosfstems Laboratories Ir Bcca Raton Florida for analysis The sarnpl rg and chain -of custody procedures followed Laigar s approved Coin:QAP No 880911 and the 2CO2 FDEP Staidard Operations Frocedures The samp es Nere aral,' ed for ccmpcurds listed in +-ie Gasoltre Kerosene Ana'yt cal Croip as defined by Cnapte 62-770 F A C The KAG includes VOA ay EPA Method 8260 PAH by EPA Me hid 8270 FL -PRO Ethy'ene Dtbromide (EDE) by EFA Method 8011 and lead Laigar reviewed crevious s to data rhat indicated dissolved arsenic in the groundwater Therefore, Langan chose to analyze for arsen c by EPA Method 6011 as opposed to lead The analrica' results ird dated that none of the c.ompourds ,ested at lecat ons TW1W-4 DP 1 DP -2 and DP -3 were detected above met-od de ect ci limits The previous known sampling el.ent data at this well !coat on TM`iV-4 (14 Oc ocer 2002' snowed concert at ons of bar:ere total x,rer-es and arse^mc exceeding t"ei rescec`P re Chapter 24 Coda cf I','iarr► �ade Cowrt,, Group ;wa er C ea -Lo Ta ge+ Levels rCCTL) Arsen c v s de acted a c )cr T\1v'1 5 a a cancer ra'icr of 1 ug L above the COT,_ cr 10 i-1cP-a-h-t-e"e Was Je'ec'ed at a cJrc3'', a.ic., o' L c o 1 S I The The p cus k cr,^ °3M pli lrg ere- V':7i _ca lc' , 't C: ctz 2_r✓_ s-',, corce,rt a c":".-: A Coca c-- TN" t`'e t0'a x'j Win.] sv "I - c <---? ece:d -ei -"_'.' rne'n,�ra-r a s�� e -d " r,,e r=e, 1 +� a v v �n� Ras _cr�rc c^ncer, ra' -s sampilig ever e. v '12 r " r Conclus'ons a^d Re:.cr-merda ors Based on tr.. -23.r 3 ^3' J 1,.~.,C.J 3 field sar'pitrg a— 3'3 :3 r'y NC -as •f 5 iii recommendat. s Org nal Sheetoi e Scnerne w',n T cs el 16 5 `t With tie current sheetpile, cewa erns s js'ern ccrf g uration we anticrpa e grouidK a e, pumping rates cf abou' 1000 gom A. Groundwa er drawdoivn is estimated to be about 8 to G ft immediately adjacent tc the excavat an and returning to statc level aoout 200 ft to 300 ft away from the exczda;'on perimeter Wtthln a zore of about 1C0 ft away from the sheetpi►es drawdcwr Is estima`ed to be about 3 ft B These drawdown lei e's are grea'er thar recommended for the adjacent s+, Jc;ures Tits theoretical drawdown 1nfiuerce zone woulc also cause migration of grcurdNa'er toward the site within the zone C To preclude the movement cf groundwater (and contaminants) at the former service station fao lity we recommend that a temporary secondary ccnta nmert wall as previously discussed be ins'ailed around the western boundary or the former service stat on face it/ This wall shculC also cover a portion o both the northern and sJuther^ sides of he former sere ce station site Perimeter Sheetoiles F_xtended o ei -20 ft The drawdow►i Impact zone could be diriInis 'ed by d i ping he ex sting sheets the add tore' Cl/ to 4 ft of prese^' stick up For this case dewatenng effluent foNs would not be decreased significantly from tie previous case A The drawdown would of accut 4 to 5 ft in the ,mrneciate a, ea of the shee p les and it would ► et.,rn to s a lc wtnir about 200 to 300 `` cr the sheetples Within a zore cF acaut '0C ft from 'he sheepil.s she drawdown would be about 2 ft or less B Tnis re4Lced :enefic al to 'h8 ::\d ai cjec' es�a ial'y cr he s , .,C'.re3 to tie VL'es' and south r':Ivie,e a Se.cJ"d3 1 ocnrrrer'er y,all is still required ar;u,nc tre forrrer se^/icc s'at on site to the soul~east Recortr'enca c^s BaSec or o..r 3tu.ie N� ,e,. ....,- influence cf a'e crrY r A The s-et-i`e3 k.r T-, _ f 'i cap? ;,s a a.-2�.. ,-e c A ~c re -e.:1 G1TIC ' 12y el dt r ra au ;,t cra 3 c -r r s �n t"= sa-c s -a sct s -r Gd rq <aif 3 SCS T}? 4.Cc- dtr'r r a ,f -"t atWayre- �trzta r-•• tar serer :art zcrta era 1 s~c�!d be ccr- -...cte.� a :L.":1 re vas a oer'icr cf "a sc:,rrer-- bcyncary c `-e cr—er Seri S a c~ . L. A f erra g= s vs,ar ;~c;,ic ba irsttiled anc r,.ff.e4 a c^v e eves•= .. site This nrrrnca t"e gi va*ar draws rT c^ "is Cr the s~e " _ a-.4 -' ra Based on the acove precautionary measures the erfLenc rage will be reduced to about 750 gprn In addrtron the drawdown impact will be 1 tc 2 F or less on the critical s des to thF southeast and to the west The containment wall on the southeast shout; essentially orec'ude the migration of contaminarts from this area We recommerd that groundwater sampling and testing be performed on a penccic basis to Insure that the effluent waters remain untainted In addition the groundwater levels should be monitored at the previously selected points surrounding tfie site on a corbnual basis to assure that the drawdcwn does not have a negative impact an the surrounding structures or the previous Service Station condrtions to the southeast Should you have any questions zoncemirg this letter please call us at (305) 362 1166 Very tr./1y /ours LANGAN ENGINEERING AND ENVIRONMENTAL SERVICES, INC Vincent D Yanna P G Assistant Project Manager Roger A Archabai P E Associate VDYIRAA cs cw Armardc Nunez 1 Village of Kay Blscajne Jud KLrlancheeK \ Village or Kai B scare Manny Todons 1 DERM Jack e Lianc \ CER\1 Lar a.m. . Langan 12 May 2CO3 60669C4 VIA FAX AND FED EX Mr Paul Abbott Skyline Management Group 4040 NE 2nd Avenue Suite 305 Miami Flonda 33137 RE Results of Additional Groundwater Modeling Studies Key Biscayne Recreation Center Key Biscayne, Florida Dear Paul - - cr cSLr - -- cc \trEr r A S 31 + I +I�1 e osecr = r;criur L-crari 0 Sa D L y Cern s J Le -r/ o E This letter supplements our report package dated 6 May 2003 and presents the results of our additional groundwater modeling studies performed for the Key Biscayne Recreation Center Specifically this letter addresses the eastern side of the excavation particularly southeastern side In our 6 May 2003 letter report we recommended A The existing sheetpiles should be driven into the ground the additional 3% to 4 ft of stick up This will place the tips at about el 20 to el -21 to cutoff' the horizontal flow component in the upper sand stratum 8 A secondary containment wall should be constructed around the western northern and a portion of the southern boundary of the former Service Station to the southeast This could consist of similar sheet piles as used for the excavation perimeter however the tips of the sheets .should extend to about el -30 C A recharge system should be installed and utilized along the western boundary of the site approximately as shown cn Figure 1 This will minimize the groundwater drawdown on this side of the site initially a recharge system on the east side way not considered due to potential contamination alcrg the southeastern side However since contamination was not encountered a recharge system would be viable on the eastern s de This letter addresses the use of a groundwater recharge sys em along the eas erg S;ce Ilef_ of the Secondary conta rr"e'lt as d,scussed in item B abo` e —900 tit E L M N p O J �� J 3 s J J J r " J L 1 " ' V u 3 a v i d c r e . . n l o e s r , a e s c L . r o I c r o ` e s c ^ r e o r c ' e r - ' r 1 , 3 c c r ��e t ��. c c r - T i d r y . , e a . s L O a I L a b s c r t , n o s o r n e , r , u r i p e c e r s r r a k r g h e n e , e r L e n r c t k e s I d " ? s s e k i ' j e u r d e r s ' a r d L ' ' d L L I " e e < c e s s e r t L . e r L v a t e r s ' v i i i c e p u r - p e d n f i n e 5 . , I " 1 d a i r i r I C o r , - e e a s t s d - ' o r F e r r ' v o o d R o a d W e f u r t h e r u n d e r s t a n d I r o n " M r A i l - l a - d o N , , r e : D i r e c t o r c + P r . . o i �%c , ' / v c r k s i t k t h e V i l l a g e c , r ` e y B l s c a n e t n a L t h e s o r r n d . a i r s j s , e r ' d i ' a l g e s ! r h o d C e p i r j e c c r 1 , e l l s T n e r e c h a r g e s y s } e m w o u l d c c n s s t o f a s e r i e s o r c l o s e l y s p a c e d w e l l p o �%n t s w i t h t h e t i p s e m b e d d e d a t a b o u t e l - 6 P u m p e d w a t e r f r o m t h e d e w a t e n n g w e l l s c o u l d b e r e - i n j e c t e d i n t o a l i n e o f r e c h a r g e w e l l s a l o n g b o t h t h e w e s t e r n b o u n d a r y a n d e a s t e r n b o u n d a r y T n e p r i m a r y p u r p o s e o f t h e r e c h a r g e s y s t e m i s t o m i n i m i z e t h e d r a w d o w n i m p a c t o n t h e a d j a c e n t p r o p e r t i e s a n d t h e m o v e m e n t o f p o t e n t i a l c o n t a m i n a n t s B a s e d o n t h e r e s u l t s o f o u r m o d e l t h e d r a w d o w n c o u l d b e e s s e n t i a l l y n e g a t e d a l o n g b o t h t h e w e s t e r n a n d e a s t e r n s i d e s i f a r e c h a r g e s y s t e m i s u s e d B a s e d o n t h e a b o v e s h e e t p i l e / d e w a t e n n g / r e c h a r g i n g s y s t e m t h e d e w a t e n n g p u m p i n g r a t e s h o u l d b e a b o u t 1 2 5 0 g p m I n a d d i t i o n t h e d r a w d o w n i m p a c t w i l l b e n e g l i g i b l e l e s s t h a n 1 / 2 f t o n e i t h e r t h e w e s t s i d e o r e a s t s i d e T h e r e c h a r g e s y s t e m s h o u l d a l s o e s s e n t i a l l y p r e c l u d e t h e m i g r a t i o n o f p o t e n t i a l c o n t a m i n a n t s f r o m a d j a c e n t s i t e s T h e M O D F L O W m o d e l d r a w d o w n a n d p e r t i n e n t d a t a a r e a t t a c h e d a s F i g u r e 1 A s b e f o r e w e r e c o m m e n d t h a t g r o u n d w a t e r s a m p l i n g a n d t e s t i n g b e p e r f o r m e d o n a p e r i o d i c b a s s i n t h e e x i s t i n g m o n i t o r i n g w e l l s T M W - 4 a n d T M W - 5 t o e v a l u a t e t h e g r o u n d w a t e r c o n d i t i o n s a n d p o t e n t i a l m i g r a t i o n o f c o n t a m i n a n t s I n a d d i t i o n t h e g r o u n d w a t e r l e v e l s s h o u l d b e m o n i t o r e d a t t h e p r e v i o u s l y s e l e c t e d p o i n t s s u r r o u n d i n g t h e s i t e o n a c o n t i n u a l b a s i s t o a s s u r e t h a t t h e d r a w d o w n d o e s n o t h a v e a n e g a t i v e i m p a c t o n t h e s u r r o u n d i n g s t r u c t u r e s o r t h e p r e v i o u s S e r v i c e S t a t i o n c o n d i t i o n s t o t h e s o u t h e a s t S h o u l d y o u h a v e a n y q u e s t i o n s c o n c e r n i n g t h i s l e t t e r p l e a s e c a l l m e a t ( 3 0 5 ) 3 6 2 - 1 1 6 6 V e r y t r u l y y o u r s L A N G A N E N G I N E E R I N G A N D E y f ��O N M E N T A L S E R V I C E S , I N C R o g e ) P / A r c h a b a l P E A s s o c i a t e F l o r i d a R e g i s r a } c n 4 3 4 0 4 R A A c s t t a c b r ' e n L s F �%g L , r e 1 c c A r m a n d o N u n e z _ \ V i l l a g e o f K e y a s o a , n e J u d K . . r l a r c h e e K \ V i l l a g e V I r ` e y B s c a y n e M a n n y T o c o n \ D E R N ! J a c k , e L l a n o ' D E R V ! T . D , 3 c c ^ - ' 0 " I " ' 2 3 " ��a ����l 5 ^ " C _ ( x , _ 7 1 O r 1 3 C . c i ^ y B �� L a n g a n E Vr" FIELD CHANGE ORDER PROJECT Village of Key Biscayne CommJnits, Ctn er TO COYTRA James A. Cummings, Inc DIRE CTIYE "O DATE VKB PROJECT NO CONTRACT DATE CONTRACT FOR 002 June4, 2003 YKB-98069000 GMT — Oct 17, 2002 General Construction You are hereby directed to incorporate the following change to the contract: Based on the results of the onsitc waterquality levels samples (supplied by Langan Engineering), we are postponing the installation of the recharge system for the dewatering program Only the installation of the recharge system will be on hold until additional information from the background ammonia study is received, all other preparations for the dewatenng process are to continue as scheduled ANTICIPATED ADJUSTMENTS 1 The proposed bans of adjustment to the Guaranteed Max.mum Price is o Lump Sun (increase) (decrease) of S D taut PriceofS o AA provided in Subparagraph 10 1 3 of Agreement between Owner and Construction Manager o As follows cper subpstrsgrank9 0 cost_plue) 2 The Contract Time is proposed jto be deter runedl The proposed adjuatraamt of( to be determined' nedl day(s) when signed by the Owner tad Contractor, this docament becomes effective IMMEDIATELY as a FIELD CA 4 NGE ORDER, and the Contractor shall proceed with the change described above Village of Key Biscayne S1cyluio Vans ttr nt Grou ow'ruR 89 West Martyr: Street ADDR23 Key B1Sc3 yce F 76)33149 BY DkTEs O AR AGENT 99 West McIntye Sit=e AD DRLSS Key Bscayne F'orda 33149 OW Stgnaturr by the Cantrsctor !wheats.' the Contractor a agreement with the propaed adjustment* in Contract Sera and Cow Tome rforth iflthis Feldaway e lames A Curare. n CO? TLAC?OR 3575 N W 53 1 Sweet ADDAMS Ft Laadc-dale F1cr da 333C9 Inc BY RECEIVEWS JUN c4 2c0: ,1a 7-;^ 1 r,> i���