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HomeMy Public PortalAboutTO 2022-05 WWTP - RIBS -Rapid Rate Infiltration Basin - JacobsTASK ORDER 2022 - 05 THIS TASK ORDER IS ISSUED PURSUANT TO THE STANDARD MASTER AGREEMENT FOR PROFESSIONAL SERVICES DATED MAY 03, 2021 (AGREEMENT), FOR THE CITY OF CRESTVIEW, FLORIDA, WHICH IS INCORPORATED HEREIN BY THIS REFERENCE, WITH RESPECT TO Professional Engineering and Consulting Services for the Rapid -Rate Infiltration Basin Expansion - Detailed Design and Construction Article A. Purpose The City of Crestview (City) has seen significant population growth in recent years and that growth has created the need to expand and build new residential communities. This growth has led to an increase in influent flow at the Crestview Wastewater Treatment Plant (WWTP). In addition, planned expansion of the SR 85 bypass road and future East-West corridor will be constructed on the existing effluent spray field thus reducing overall effluent disposal capacity at the WWTP. As part of the Phase IV WWTP Expansion and RIBs project, CH2M HILL Engineers, Inc., a wholly -owned subsidiary of Jacobs Engineering Group (Jacobs) designed the current RIBs site (5 RIBs with 0.63 million gallons per day (mgd) permitted capacity) to be expanded by the construction of RIB No. 6 as required by area growth, influent flows and property acquisition. The existing RIB system was put into service in July 2014. However, the City was not able to acquire the land parcel on which RIB No. 6 was to be constructed. Jacobs will be initiating a field study on the existing RIB site, under a separate task order, to collect additional data to support a substantial modification of the current operating permit to increase the permitted disposal capacity of the RIB system. The City has identified a parcel of land located northeast of the WWTP site (RIB 6 property) as another potential reuse disposal site. The construction of RIBS on the RIB 6 property is required to meet the City's rapidly growing wastewater disposal needs. The purpose of Task Order 2022-05 is to authorize and direct Jacobs to proceed with the professional engineering and consulting services for the detailed design of a new infiltration system on the RIB 6 property. Article B. Scope of Services: Project Understanding A forested, vacant land parcel adjacent to the Crestview WWTP (RIB 6 property) has been identified as a potential site for an infiltration system. See Figure 1 for the location and boundaries of the parcel to be evaluated. The parcel is 48.7 acres in size and is similar (topography and soil types) to the City's existing RIB site located south of the RIB 6 parcel. ',RIB 6 PROPER FIGURE 1 -CRESTVIEW WWTP AND RIB 6 SITE PLAN The scope of services provided with this task order is outlined in detail below. Task 1 - Detailed Design Following completion of the preliminary design phase under Jacobs Task Order 2022-04, Jacobs will provide design services to develop construction plans and specifications for the RIBs expansion. Jacobs will develop the following submittals and submit to the City for review and comment: 90% Submittal The 90% submittal will provide detailed drawings that include developed General, Civil, Mechanical, Structural, Electrical, and Instrumentation and Control sheets. Draft front-end specifications and detailed technical specifications will also be provided. Released for Bid Submittal Jacobs will compile comments from the 90% deliverable and finalize any remaining information into a Released for Bid package that will include detailed drawings for all disciplines and a final specification package. Jacobs will submit 2 hard copies and a PDF copy at each submittal phase and will conduct a review meeting to address comments and questions regarding information presented. 2 Deliverables Under this subtask, Jacobs will deliver to City the following items: • 90% submittal • Released for Bid submittal Task 2 - Bid Phase Services Jacobs will assist with bidding services for the construction of the RIBs expansion. City will provide electronic copies of the bid documents to prospective bidders, equipment suppliers, or other parties upon request. Jacobs will respond to requests for information and produce addenda to the bid documents to address questions and changes discovered during the bid phase. Jacobs will coordinate and attend a prebid meeting. Jacobs will prepare meeting notes from the meeting and distribute to plan holders electronically as part of an addendum. Jacobs will attend the bid opening and tabulate the bid proposals, perform an analysis of the bids, and make a recommendation to the City for award of the contract pending City's legal review. Jacobs will prepare conformed documents that will incorporate the changes made during the addenda. These will be distributed to the City and selected Bidder for execution. Deliverables Under this task, Jacobs will deliver to the City the following items: • Up to three (3) addenda • Prebid agenda and meeting summary • Bid tabulation and recommendation of award Upon selection of a Bidder by City, Jacobs will prepare five (5) half-size sets of the Conformed Contract Documents for execution and use during construction. Jacobs will also provide an electronic copy to the selected Bidder and City. Task 3 - Services During Construction Jacobs will provide limited engineering services during construction for the construction of the RIBs expansion. Items under this task generally include: • Attendance at preconstruction conference • Submittal review • Pay application review • Response to requests for information • Preparation of change orders 3 • Progress meetings • Contract closeout documentation • Preparation of as-builts drawings Site Visits JACOBS will make visits to the site to attend the preconstruction meeting and monthly construction progress meetings, as well as additional visits at key milestones during construction. The schedule of these site visits is anticipated to be such that it can maximize the purpose of the visit at key points during construction and on an "as -needed" basis. Each site visit will require approximately 4 hours, including travel, field observation and report development. Anticipated site visits include: • Preconstruction conference • (8) Monthly progress meetings • (8) "As needed" visits • (16) Bi-weekly site visits • Substantial Completion and punch list • Final Completion Final Inspection JACOBS will review the work at the substantial completion and final completion stages. JACOBS will prepare one (1) punch list of items requiring completion or correction. JACOBS will make recommendations to City regarding acceptance of the work based on the results of the final inspection. Assumptions and Specific Conditions The following assumptions have been taken into consideration in the preparation of this Scope of Services and compensation. These assumptions are based on the project scope, which is to deliver to the City of each of the following: contract documents, plans, and specifications of sufficient detail to obtain a reasonably accurate bid for services to construct the proposed improvements and for the Contractor selected to be able to construct the facility and to assist the City with monitoring of the construction of the project; and to provide limited post -construction assistance. Should deviations from these assumptions be required to deliver the services described in this scope of services, the scope of work and compensation shall be modified accordingly and approved by the City in writing before any changes to this scope of services can be implemented or delivery of the original scope of services completed. • Field analyses and evaluations will be performed on the RIB 6 parcel with an area of 48.7 acres. 4 • Jacobs will use existing parcel boundary lines and topographic data available from the survey performed by Jacob's subcontractor, Okaloosa County GIS and other sources to prepare the design drawings. • The design and released for bid drawing package is assumed to include up to nine (9) general and legend sheets, nineteen (19) detailed design sheets, and twelve (12) detail sheets. • WTS Wells 1 and 2 will be removed after the completion of Task Order 2022-04. All other WTG and WTB wells will be abandoned during construction of the infiltration system and the abandonment cost is not included in this task order. • The City will advertise the project for bidding. • If the Jacobs is called upon to observe the work of City's Construction Contractor(s) for the detection of defects or deficiencies in such work, Jacobs will not bear any responsibility or liability for such defects or deficiencies or for the failure to so detect. • Jacobs shall not have control over or charge of and shall not be responsible for construction means, methods, techniques, sequences or procedures, or for safety precautions and programs in connection with the work of each of the Contractors since these are solely the City's responsibility under contract for construction between the City and Contractor. • Recommendations by Jacobs to the City for periodic construction progress payments to the construction contractor(s) will be based on Jacobs's knowledge, information, and belief from selective sampling that the work has progressed to the point indicated. Such recommendations do not represent that continuous or detailed examinations have been made by Jacobs to ascertain that the construction contractor(s) have completed the work in exact accordance with the construction documents; that the final work will be acceptable in all respects; that Jacobs has made an examination to ascertain how or for what purpose the construction contractor(s) have used the moneys paid; that title to any of the work, materials, or equipment has passed to the City free and clear of liens, claims, security interests, or encumbrances; or that there are not other matters at issue between the City and the construction contractors that affect the amount that should be paid. Article C. Project Schedule Work will begin upon execution of this task order. A preliminary milestone schedule is shown below. 5 TABLE 1 - PRELIMINARY SCHEDULE Rapid -Rate Infiltration Basin Expansion Task Projected Completion Date Task 1 - Detailed Design Within 15 weeks of completion of TO 2022- 04 Task 2 - Bid Phase Services Within 6 weeks of advertisement Task 3 - Services During Construction Within 42 weeks of Award 6 Article D. Compensation As compensation for providing the services described in Article B. Scope of Services of this task order, the City shall pay Jacobs in accordance with Section 5 of the Agreement, on a time and material basis with a not -to -exceed amount of $273,000. The estimated breakdown of fees is shown in Table 2 below. TABLE 2 - ESTIMATED FEE SUMMARY Rapid -Rate Infiltration Basin Expansion Task Estimated Fee Amount Task 1 - Detailed Design $209,400 Task 2 - Bid Phase Services $12,000 Task 3 - Services During Construction $47,500 Field Work Travel Expenses $3,100 Field Work General Expenses $1,000 Total $273,000 7 Article E. Authorized Representatives The Authorized Representatives designated below are authorized to act with respect to Task Order 2022-05. Communications between the parties and between Jacobs's subcontractors shall be through the Authorized Representatives: For the City of Crestview, Florida For Jacobs: Name: Wayne Steele Name Scott Jernigan Address: P.O. Drawer 1209 Crestview, Florida 32536 Address: 25 W. Cedar Street, Suite 350 Pensacola, Florida, 32502 Telephone: (850) 682-6134 Telephone: (850) 941-7282 Article F. Authorization: Task Order 2022-05 is effective as of `P -1Z , 2022 Accepted for City by: Accepted for Jacobs by: me: J.B. Whitten Name: Nick Freeman Title: Mayor Title: Principal Project Manager 8 JACOBS Memorandum 25 W Cedar Street Suite 350 Pensacola, FL 32502 www.jacobs.com Subject Conceptual Design Report Project Name Crestview WWTF RIB 6 Attention City of Crestview Public Services Project No. D3592900 From Jacobs Engineering Date 08/31/2022 The City of Crestview (City) has seen significant growth in recent years and that growth has created the need to expand and build new residential communities. This growth has led to an increase in influent flow at the Crestview Wastewater Treatment Plant (WWTP). In addition, construction of the SR 85 bypass road and East-West corridor has begun and these roadways are being constructed on the existing effluent spray field area, thus reducing overall effluent disposal capacity at the WWTP. As part of the Phase IV WWTP Expansion and Rapid -Rate Infiltration Basins (RIBs) project, CH2M HILL designed the current RIBs site (5 RIBs with 0.63 million gallons per day (mgd) permitted capacity) to be expanded by the construction of RIB No. 6 as required by area growth, influent flows and property acquisition. The existing RIB system was put into service in July 2014. However, the City was not able to acquire the land parcel on which RIB No. 6 was to be constructed. The City recently purchased an approximately 49 -acre parcel to the Northeast of the WWTP to construct additional RIBs and help satisfy the need for additional effluent disposal capacity. 1. Existing Effluent Disposal Prior to the construction of the SR 85 bypass, effluent from the Crestview WWTP was disposed of by means of a 241 -acre spray field and 5 Rapid Infiltration Basins (RIBs). A total of 0.63 million gallons per day (MGD) of disposal was permitted at the RIBs and a total of 2.10 MGD was permitted at the spray field. The treated wastewater is disinfected through a chlorine contact basin and the effluent then collects in the RIB pump station at the outfall of the basin. The effluent is pumped from there to the existing RIBs until the permitted daily RIB disposal capacity is reached. The outfall basin also has a 30" overflow pipe to convey the remaining effluent flows to the 10 million -gallon (MG) spray field holding ponds. The WWTP effluent disposal capacity was recently modified in the current permit due to the reduction in spray field area resulting from the roadway projects. Appendix A includes maps of the effective spray field area before and after the permit modification. The current disposal capacity of the spray field reduced from 2.10 MGD to 1.53 MGD. Jacobs has performed an in depth hydrogeologic study of the existing RIBs site to determine the feasibility of increasing its Please select a iegai entity from the Change Document Details option on the Jacobs ribbon Enter Document No. via Document Properties JACOBS Memorandum Conceptual Design Report permitted disposal capacity to recoup a portion of the lost spray field capacity. The results of this study validated the ability to increase effluent disposal through the existing RIBs to nearly double the original disposal rate; up from 0.63 MGD to 1.12 MGD. Jacobs has submitted a revised permit application to the Florida Department of Environmental Protection (FDEP) to request approval to rerate the permitted effluent disposal capacity of the existing RIBs. Upon acceptance, the current total effluent disposal capacity of the Crestview WWTP will be 2.65 MGD. 2. Proposed Effluent Disposal Upgrades To help meet the continued need for effluent disposal., the City purchased approximately 49 acres to the Northeast of the WWTP to be used for future effluent disposal. The location of this property in proximity to the WWTP is shown below in Figure 1.1. Also shown in Figure 1.1 is the existing RIBs, Crestview WWTP, spray field, and the spray field holding ponds. A preliminary evaluation of the new property was performed to determine the optimum method for disposal. Due to the sites native soils and the existing topography, RIBs were the chosen method of disposal. Figure 1.2 shows a layout of the property and a preliminary configuration of the RIBs. This RIBS expansion project is commonly referred to as the RIB 6 project since there are currently 5 total existing RIBs. 2 JACOBS Memorandum CRESTVI W EXISTING SPRAY FIELDS &XISTIIYG SPRAY FIELD HOLDING PONDS EXISi7N ,FRAi'FIELDS Conceptual Design Report EXISTING R1315 Figure 1.1: Overall view of the Proposed Crestview Effluent Disposal. 3 JACOBS Memorandum UMEROCX A N8 SPUTTER BOX LIMEROCXACCESS DRIVE LIMCROCKACCESS DRIVE EXISTING SPRAY FIELDS 0 CRESTVIEW WWTP SIT Conceptual Design Report FLORIDA POWER&LIGHT EASEMENT RI RIB 6 PROPERTY PROPER ME FFLUENT GRAVITY TINS(TYP) DIRT Access DRIVE NARY BASIN YOUT(7YP) . . . _. CE RIB CELL Area (Acres} _ 1 1.875 2 1.875 3 1.875 4 1.875 Figure 1.2: Preliminary Layout of the proposed RIBs 2.1 RIB 6 Disposal Site Evaluation The effluent disposal capacity of a RIB is a function of loading rate in inches per week and RIB bottom surface area. Infiltration rates are dependent upon the native soil types, subsurface conditions and topography and can vary widely from site to site. A geotechnical investigation was conducted within the 49 -acre parcel consisting of 8 soil borings to classify the soil types and stratification. A total of 3 borings were developed into temporary monitoring wells and 2 additional stilling wells were installed. Jacobs is currently working on a RIB pilot test and groundwater model in an effort to determine the effective disposal capacity for the site for FDEP approval. At this planning stage of the project, we will utilize available soils data, topographic survey data and loading rates evaluated in Crestview's existing RIBs to estimate the disposal capacity for the RIB 6 property. See Table 1 below for the typical range of infiltration rates that may be achieved 4 JACOBS Memorandum Conceptual Design Report by the new RIBs along with a summary of the disposal capacity of the spray field and existing RIBs 1 thru 5. The topography of the site limits the feasibility to construct RIBs to the eastern half of the property resulting in approximately 25 acres of disposal area. Considering footprint requirements for the berms, access drives and associated infrastructure, and spacing between RIB cells, the developable RIB bottom area is approximately 30% of the total area. Based on these conditions, the effective RIB bottom area anticipated is 7.5 acres. During the modeling analysis, the RIB bottom area will be further evaluated in detail to maximize the disposal capacity of the property. Table 1: Crestview Effluent Disposal Capacity Summary Summary of Effluent Disposal Capacity Bottom Area Loading Rates (Acres) (inches/week) Disposal Capacity (MGD) Spray field — Original 241 2.2 2.10 Spray field - Modified 176 2.2 1.53 Existing RIBS - Original Existing RIBs - Rerate 7.65 21 0.63 7.65 38 1.12 Proposed RIB 6 - Low Infiltration 7.5 20 0.58 Proposed RIB 6 - Medium Infiltration 7.5 30 0.87 Proposed RIB 6 - High Infiltration 7.5 40 Estimated Effluent Disposal. by RIBs 1.16 1.99 Estimated Total. Effluent Disposal 3.52 2.2 Effluent Pumping and Conveyance Alternatives Conveying treated effluent to the RIB 6 site will require improvements to the existing RIB pump station. The modifications need to allow for effluent to continue to be pumped to the existing RIBs as well as the proposed RIB 6 site. Several pumping and conveyance alternatives were evaluated: including upgrading the existing RIB pump station, construction of a new RIB 6 pump station, and upgrading the existing spray field pump station. Because the capacity of the spray field is now reduced, it is possible to replace two of the existing spray field pumps with new pumps sized to convey effluent to the RIBs. This alternative was ultimately determined to be an ineffective long-term solution since the City is planning to repurpose the spray field and holding pond into a community sports complex. The existing RIB pump station has space available for a third effluent pump making it possible to cost effectively increase its pumping capacity to convey effluent to both the existing RIBs and to RIB 6. Therefore, it is recommended the existing 5 JACOBS Memorandum Conceptual Design Report RIB pump station be upgraded to pump to RIB 6 by installing a third submersible pump in the pump station, modifying the pump station discharge header, and constructing an effluent force main to RIB 6. 2.2.1 RIB Pump Station Improvement Recommendations With the addition of RIB 6, the total effluent disposal. by RIBs is estimated to be approximately 2.0 MGD or 1,390 gallons per minute (GPM) based upon a 24 -hour day. Influent wastewater flows to the WWTP generally follow a diurnal pattern with peak flows occurring in the morning and evening and low flow periods overnight. To accommodate for this flow pattern the total 2.0 MGD is expected to be pumped over an 18 -hour period. This equates to an average flow rate of roughly 1,850 GPM and is the minimum recommended pump station capacity. Currently, the existing pump station has two submersible pumps with a third empty pump slot. The existing capacity of this station is 1,200 GPM based on a single pump in service and the second pump as a back-up to meet class 1 reliability. With a third pump installed, the rated pump station capacity will increase to the capacity of 2 pumps in service with the third as a back- up to meet class 1 reliability. The pump station design was evaluated based on installing a third pump of the same size as the existing, resulting in a pumping capacity of 1,850 GPM. Therefore, the minimum capacity may be achieved with the installation of a third pump and is a cost- effective solution. Table 2 shows the current and recommended upgraded effluent pump station capacity, number of pumps installed, and the effluent disposal locations associated with the station and each scenario. Table 2: Effluent Pump Station Capacity Existing Effluent Pump Station Pump Station Capacity (GPM) Effluent Disposal Location 2 Pumps, 1 Operational and 1 in Standby 1,200 Existing RIBs Upgraded Effluent Pump Station 3 Pumps, 2 Operational and 1 in Standby 1,850 Existing RIBs and RIB 6 2.2.2 Effluent Force Main Recommendations Permit regulations require effluent flows to be metered and totalized each day to verify they do not exceed the permitted disposal capacity. To use the same RIB pump station to both sets of RIBs will require the effluent force main to be modified to split and route to RIB 6 upstream of the existing flow meter. A new flow meter will then need to be installed on the force main dedicated to RIB 6. The new effluent force main is recommended to be a 12 -inch diameter C900 PVC main. Figure 2.1 shows the proposed RIB pump station upgrades. Figure 1.2 shows the overall route of the new effluent pipeline to RIB 6. 6 JACOBS Memorandum 4" DR {TYF) —�-'- CHLORINE CONTACT BASIN TRAIN 1 Upgrade Discharge Pipe Header with a New 12" Check Valve, 12" Plug Valve, 16"x12" Tee and B0 Bend Install New Submersible Pump WEIR PLATE RIB PUMP STATION 1-1:t2" W3 Conceptual Design Report W3 PUMP - STATION 30" PLE New 16"x12" Reducer Exlend Concrete Pad EXISTING 30" FORCE MAIN F DOGHOUSE MANHOLE New 12" Flow Meter New 12" Central Valve New s2" Foroe Main to RIB 6 Splitter Brix INSTALL NEW 16" CONTROL VALVE 16" PLE TO EXISTING RIBS Figure 2.1 — RIB Pump Station Upgrades 2.2.3 RIBs System Recommendations Based on a total RIB bottom area of 7.5 acres, the preliminary design consists of four 1.88 -acre RIBs. The effluent force main will discharge into a new RIB 6 splitter box centrally located between the RIBs. The splitter box will have four independent outfall chambers, each one dedicated to a single RIB. The outfall chambers will feed an outfall pipe to discharge into the RIBs via gravity. The outfall pipes will each have a manually operated isolation valve for plant operators to direct the effluent to the desired RIB. The outfall pipes will be designed for a flow rate of 925 GPM assuming two RIBs will be loaded simultaneously. Figure 1.2 provides an overall site plan for the RIB 6 project. JACOBS Memorandum Conceptual Design Report 8