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HomeMy WebLinkAboutAgreement_General_11/13/2025_Kimley-Horn & Associates VILLAGE OF TEQUESTA ENGINEERING SERVICES WORK AUTHORIZATION WATER TREATMENT MASTER PLAN The terms used in this work authorization (Work Authorization or WA) with initial capital letters have the meaning stated in the 2025 "Request for Qualifications" documents and the "Master Agreement for Professional Services" (Agreement) referenced below. This Work Authorization authorizes Kimley-Horn and Associates, Inc., to perform work set forth herein and is issued pursuant to The Professional Engineering Services Agreement, between the Village of Tequesta ("Client" or"Village") and Kimley-Horn and Associates, Inc. ("Kimley- Horn" or"Consultant"), dated October 9, 2025, (or the date fully executed, if approved, after the October 9, 2025, Council meeting in which the agreements will be brought for consideration of approval) ("Agreement"). All terms and conditions of said Agreement are hereby incorporated and made part of this Work Authorization. PROJECT UNDERSTANDING This project scope is to provide a "Water Treatment Master Plan" (Plan) for the Village of Tequesta Utilities Department (UD)to meet recent and future regulatory requirements promulgated/planned by the United States Environmental Protection Agency (USEPA). The plan is intended to provide near-, short-, and long-term goals that can be implemented to meet these regulatory requirements. These durations are quantified as follows: • Near-term: 5-year implementation schedule • Short-term: 10-year implementation schedule • Long-term: 20-year implementation schedule The Village UD uses source water from the surficial aquifer or Surficial Aquifer System (SAS) and upper Floridan aquifer or Floridan Aquifer System (FAS) wellfields for treatment and distribution to its customers. The SAS is an unconfined aquifer and the eastern portion of Martin and Palm Beach County characteristically has higher levels of hardness, alkalinity and organics. Because the groundwater is unconfined, the SAS is susceptible to contamination. The FAS aquifer is confined and is brackish with higher levels of sodium and chlorides. FAS groundwater is treated via reverse osmosis and SAS water is treated using a pressurized media filter. The product streams from both facilities are blended in a post-treatment structure for final treatment prior to being pumped to ground storage and sent to the Village's customers for consumption. In 2024, the USEPA issued drinking water regulations for per- and polyfluoroalkyl substances, or PFAS, that assigned maximum contaminant levels (MCL)for PFOA and PFOS, two specific types of PFAS, to be 4 parts per trillion (ppt), and a separate Hazard Index of 1 that is based on the calculation of concentrations for PFHxS, PFNA, HFPO-DA and PFBS (additional types of PFAS). In May 2025, the USEPA announced that it will retain the MCLs for PFOS and PFOA at 4 ppt but will extend compliance deadline from 2029 to 2031. As part of this announcement, the USEPA announced it will rescind the requirements pertaining to the Hazard Index. WATER TREATMENT MASTER PLAN 1 Many utilities in Southeast Florida have PFAS concentrations in their SAS groundwater and are working to be compliant by the 2031 deadline. The Village recently completed water quality testing of their finished water which consisted of eight(8) PFAS constituents using EPA test method 533 and 537.1. The testing displayed that under normal operating conditions using a blend ratio of 60% RO and 40% SAS, the PFOS concentration was not compliant and the PFOA concentration was slightly below compliance. As such, the Village desires to evaluate treatment options at the water treatment plant(WTP)to achieve regulatory compliance. The Village previously tested the FAS wells and found no PFAS in the source water. The Village previously tested the SAS wells at the header entering the plant and found that PFAS was present in the source water. The following scope of services is provided. SCOPE Task 1: Review Data and Collect Information Consultant will review water quality data for the individual wells and point of entry (POE) to the water distribution system, information related to current and proposed Florida Department of Environmental Protection (FDEP) regulations, wellfield pumping capacities, operation and water use allocations, site and piping plans. Consultant will visit the WTP site to take inventory of existing process equipment and better understand the limitations associated with each treatment system. This proposal assumes the Village will furnish record drawings, pump curves, equipment operation and maintenance manuals (O&Ms) and any other information needed to perform a holistic evaluation of the WTP. The Consultant will also use the"May 2020 Village of Tequesta Facilities Assessment Update" conducted by the Consultant for the utilities department. This proposal assumes up to two (2) site visits to the WTP will be made for data collection. Consultant will research and evaluate treatment methods currently available to reduce PFAS in the surficial raw water sources, consisting of granular activated carbon (GAC), powdered activated carbon (PAC), selective anion exchange (IX), membrane softening (nanofiltration or "W") and reverse osmosis (RO). However, it is known that PAC will not remove the types of PFAS found in the VOT UD SAS. Previously, the Village UD tested the water coming from the FAS and SAS wells and no PFAS was found in the FAS wells, but some PFAS compounds were found in the SAS wells. Task 2—Evaluate FAS-RO System Expansion Consultant will evaluate the following critical components of the existing WTP: • Existing FAS wells and well pumps • Pre-treatment cartridge filter vessels • RO feedwater pumps • Chemical systems (caustic, chlorine, sulfuric acid, scale inhibitor) • Post-treatment structure • Degasifiers and blowers • Odor control system • Transfer pumps WATER TREATMENT MASTER PLAN 2 • Ground storage tanks • Process piping Consultant's evaluation will include the work that is to be constructed as part of the current WTP improvements project. The purpose of this evaluation is to identify cost-effective improvements to raise capacity of the RO system. Consultant will provide the following deliverables as a part of the water treatment master plan: • Prepare membrane projections to determine maximum feasible capacity of the three (3) existing RO trains • Consultant will identify possible train modifications that can be made to optimize the array to increase production without replacing the entire train • Consultant will evaluate installation of energy recovery devices, converting the existing 2-stage trains to be 3-stage, and other concepts to enhance capacity and recovery of the WTP • Consultant will perform desktop evaluation and calculations to determine anticipated changes to finished water quality associated with raising RO production and decreasing SAS blend flows • Consultant will size and site chemical storage and feed systems that may be needed to offset these changes in finished water quality Consultant will prepare a capacity analysis review of the existing RO system and WTP • Consultant will identify limitations of existing facilities at the WTP that may affect permitted capacity • Consultant will determine the improvements necessary to these facilities to increase the permitted capacity of the WTP • Consultant will prepare schematic sketches to depict the necessary improvements to maximize capacity of the RO system • Consultant will prepare an Opinion of Probable Construction Cost(OPCC) associated with the necessary improvements; OPCCs will be Class 5 as defined by the Association for the Advancement of Cost Engineering (AACE) Improvements that will require more significant capital expenses, including, but not limited to, expansion of the process building for an additional RO train, or construction of a deep injection well, will not be detailed as a part of this task but may be included as needed for the future. Task 3 - Evaluate SAS Treatment Options Consultant will evaluate options for treating the elevated levels of PFAS in the SAS groundwater. Each of the following items will be evaluated for 1) GAC, 2) IX, 3) Membrane softening (nanofiltration) consisting of the following: • Class 5 Opinion of Probable Construction Costs—capital and operating • Waste/disposal impacts to operations and handling • Effectiveness and applicability to plant site and the current concentration levels • Advantages/Disadvantages of each • Site plans depicting the equipment necessary for each treatment process WATER TREATMENT MASTER PLAN 3 Consultant will evaluate interim alternatives to address regulatory compliance requirements through treating the SAS groundwater. C&W Engineering will provide electrical engineering services related to determining the required electrical improvements and associated opinion of probable construction cost for each item. Consultant will evaluate treatment levels necessary to bring contaminant levels to levels below the proposed MCL and conduct mass balancing calculations given raw water capacities and treatment plant demands. Task 4—Evaluate Converting Entire Rated Capacity to RO Consultant will provide the following deliverables as a part of the water treatment master plan: • Consultant will evaluate converting the entire SAS rated treatment capacity of 2.73 MGD to be RO • Consultant will evaluate necessary improvements to provide 2.73 MGD of additional RO treatment capacity and improvements to provide 3.64 MGD of FAS raw water infrastructure o This will consist of additional FAS well sites and raw watermain o The 3.64 MGD value is established based on 2.73 MGD of RO operating at an overall system recovery rate of 75%. 0 75% is the capacity at which additional facilities have to be evaluated, per FDEP requirements • Consultant will determine improvements required for 0.91 MGD of additional concentrate disposal capacity required as part of the RO system expansion. • Consultant will prepare an Opinion of Probable Construction Cost (OPCC) associated with the necessary improvements; OPCCs will be Class 5 as defined by the Association for the Advancement of Cost Engineering (AACE) Subconsultant (C&W Engineering) will provide electrical engineering services related to determining the required electrical improvements and associated opinion of probable construction cost for each alternative Task 5—Prepare WTP Master Plan Report Consultant will prepare a summary report that sketches, opinion of probable costs, and a list of benefits/drawbacks of each option evaluated under this scope of services. Consultant will prepare a conceptual layout of each option, which may include a schematic process flow diagram for the WTP site. The purpose of the report is to identify the long-term (20-year) goals for the Village's WTP and outline the more near(5-year) and short-term (10-year) improvements that will be needed to achieve those goals while maintaining regulatory compliance. Consultant will establish schedules for implementation of the proposed improvements associated with the selected option. If necessary, Consultant will recommend improvements that may be interim to maintain more immediate regulatory compliance deadline. Consultant will submit a Water Treatment Master Plan Report as draft. Consultant will finalize recommendations based on discussions from the review meeting completed under Task 5. Consultant will submit report as final. WATER TREATMENT MASTER PLAN 4 Task 6 - Meetings Consultant will attend one (1) kickoff meeting with the project team to discuss overall project goals, deliverables and schedule. Consultant will prepare and distribute meeting agenda and minutes. Consultant will attend one (1) workshop meeting to discuss the findings from Task 2 regarding improvements needed to maximize RO capacity. Consultant will incorporate feedback from Village LID staff to finalize that evaluation and the selected capacity. Consultant will prepare and distribute meeting agenda and minutes. Consultant will attend one (1) workshop meeting to discuss the findings from Tasks 3 and 4. Consultant will incorporate feedback from Village staff to finalize that evaluation for the proposed approach to treat SAS groundwater or convert the SAS capacity to be entirely FAS- RO. Consultant will prepare and distribute meeting agenda and minutes. Consultant will attend one (1) review meeting to discuss the draft summary report with Village staff. Consultant will prepare and distribute meeting agenda and minutes. ADDITIONAL SERVICES Any services not specifically provided for in the above scope, as well as any changes in the scope requested by the Village, will be considered additional services to this Work Authorization and will be performed based on subsequent Work Authorizations approved prior to performance of the additional services. INFORMATION AND SERVICES PROVIDED BY THE VILLAGE Kimley-Horn assumes that all information provided by the Village LID can be relied upon in the performance of professional services. The following information shall be provided to Kimley- Horn and/or the following services will be performed by the Village. • Historical water quality and well information • Monthly Operating Reports (MORs) • Record drawings • Operation and maintenance (O&M) manuals • Pump curves • Equipment information DELIVERABLES The following deliverables will be provided as part of this Task Order: • DRAFT WTP Master Plan Report • FINAL WTP Master Plan Report • Meeting agendas and minutes SCHEDULE Consultant will work as expeditiously as practical and concurrently with the Village's schedule. WATER TREATMENT MASTER PLAN 5 COMPENSATION Kimley-Horn will perform the services described herein on a lump sum basis for$121,091.52. Fees for individual tasks are as follows: Task# Description Fee 1 Review Data and Collect Information $12,384.69 2 Evaluatate FAS-RO System Expansion $33,066.20 3 Evaluate SAS Treatment Options $212087.41 Evaluate Converting Entire Rated Capacity $15,790.46 4 to RO 5 Prepare WTP Master Plan Report $22,537.16 6 Meetings $16,225.60 TOTAL LUMP SUM FEE: $121,091.52 Accepted by: Village of Tequesta Kimley-Horn and Associates, Inc. Z- -41- Molly Young, yor Date: `13-Z5 Date: '2&L"3- WATER TREATMENT MASTER PLAN 6 �F`�'`|]!_!;„{ �!�| | ' f| � ' � \|| } �•E | !,`!| F ,� � !!)| }(®! .... , 2 ■\9` § [ !. |- \ !, {,! ..... .11.1.1 1 LULL...._---_______ | � ' | \ §; § ;, , % `-` � !\ .,,. .. ... ...... ................. .... r - '■ . ■! _ , ! . 9g ` | .|: /) !�!!! ■;E| !i§i §;;;!!! ;[|§[[|(§r!!!!!!§r ;�l;; � C & W engineering Inc. Consulting Engineers — Electrical • HVAC • Plumbing 6903 Vista Parkway North, #10 West Palm Beach, FL 33411 (561) 642-5333 September 10, 2025 Nick Black. P.E. Kimley-Horn & Associates, Inc. 1920 Wekiva Way West Palm Beach, FL 33411 Subject: Village of Tequesta PFAS Treatment Master Planning, Electrical Engineering Proposal C&W Ref. 256625 Dear Nick: I am pleased to submit this proposal for your consideration to provide Electrical Engineering Services for the above-referenced project. We understand the work will include the following tasks: The evaluation and proposed improvements to the village's existing Surficial Aquifer Supply (SAS) and Floridan Aquifer Supply (FAS) wellfields and FPAS concentrations in their SAS groundwater so compliance by the 2031 deadline is achieved as outlined in the Kimley Horn project understanding writeup. The evaluation would include an assessment of the present treatment plant equipment and treatments being used. Task 1: Review Data and Collect Information Provide Electrical evaluation of the existing Water Treatment Plant and take inventory of the existing process and equipment used in each treatment system. We would team up with Kimley Horn staff and provide one, possibly a 2nd site visit to collect information and assess the equipment condition and treatment methods used. Task 2: Evaluate FAS-RO System Expansion We will evaluate along with Kimley Horn existing components and equipment used at the WTP. Based on this evaluation we will provide improvements as needed; these shall include: Existing FAS wells and pumps and related electrical systems, including emergency C&W Ref. 256625 backup systems. Pre-treatment cartridge filter vessels RO Feed water pumps and related electrical systems. Chemical Systems Post Treatment equipment including field instruments, grounding, lightning protection, and other related systems like Degasifiers and blowers. Odor control system Transfer pumps Ground Storages Tankes Plant field instruments like analyzers, pressure sensing, flow, level and the like. Based on Kimley Horns capacity analysis we will prepare an analysis of the existing plant electrical equipment capabilities, emergency power capabilities, controls and instrumentation capabilities and the proposed equipment related to planned expansion and growth based on the outlined recommendations. We will prepare schematic sketches of proposed improvements related to the various solutions outlined. We will include Opinions of Probable Constructions Costs (OPCC) for each of the solutions provided. Each of these would consider the costs related to the equipment improvements, capital and operating costs. Task 3 Evaluate SAS Treatment Options Provide Electrical evaluation based on the equipment and costs of the proposed improvements which would include: 1)GAC 2) An Ion exchange system 3) A membrane treatment (nano-filtration). Each of these would consider the costs related to the equipment improvements, capital and operating costs. Task 4 Evaluate Converting Entire Rated Capacity to RO We would consider the necessary electrical improvement based on converting the entire plant capacity and related electrical costs to provide such improvements in the electrical system to handle the needed normal power (electric utility) equipment, and the needed improvement to the emergency power equipment. We would identify the related costs to these electrical improvements and provide an OPCC Task 5— Prepare the Master Plan Report Provide a summary report listing the benefits and drawbacks for the options provided on the electrical equipment, including the sketches or oneline, and OPCC related to the C&W Ref. 256625 various options. We will work with Kimley Horn staff to establish a schedule of short-term and long-term improvements. Task 6— Meetings We will attend one kickoff meeting with the project team and staff and discuss the project plan, goals and deliverables. We will attend (1) one workshop meeting to discuss the findings from task 2 and go over the proposed improvements. We will also attend (1) workshop meeting to discuss the findings from Tasks 3 and 4. We will attend (1) review meeting to discuss the draft of the summary report Notes 1. We will request information, plans and record drawings from the Village staff so we may make copies, and evaluate the existing electrical systems at the plant and well sites. We will use this information as a basis to compare to the field visit findings. 2. We will coordinate with the Owner and Kimley Horn and provide the initial site visit to the plant and well sites and become familiar with the existing systems in place. 3. We will provide recommendations that would utilize the capacities of the existing systems and provide improvements that would include expanding, upgrading, and/or be brought to full build-out level of the existing electrical equipment before proposing new additional equipment, as required per the options and recommended improvements. 4. No design documents are being provided at this time; instead, the recommendations will include equipment recommendations and costs based on the options presented. EXCLUDED SERVICES We will not provide design drawings and specifications on the electrical power, controls, PLC or SCADA systems. Design, Bidding and Construction services are EXCLUDED. C&W Ref. 256625 Any additional services requested not part of this scope that may include changes requested by the village will be considered additional services to this work authorization and will be performed based on subsequent Work Authorizations to be approved prior to performing the additional services. We are not providing scope and fee to respond to Value Engineering or independent review. FEE SUMMARY Master Planning Evaluation/Draft and Final Report: $12,000 Lump sum Including meetings and field visits I trust the above scope is in agreement with your needs and expectations. If you have questions or comments regarding the above, please feel free to call. Very truly yours, C & W Engineering, Inc. Michael Guida, P.E. JLR/nl/file