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Home My WebLink About04/21/2026 07.C. Resolution amend agmt with Geosyntec Consultant (formerly Aspect)_ASR and DBP monitoring 'V ''i i1� • r y/I i BUSINESS OF THE CITY COUNCIL YAKIMA, WASHINGTON AGENDA STATEMENT Item No. 7.C. For Meeting of: April 21, 2026 ITEM TITLE: Resolution amending agreement with Geosyntec Consultants Inc. to support City's ongoing Aquifer Storage and Recovery (ASR) program and Disinfection Byproduct (DBP) Monitoring SUBMITTED BY: Scott Schafer, Public Works Director *Daniel Tiliano, Water/Irrigation Manager SUMMARY EXPLANATION: The Water/Irrigation Division is requesting the approval of a consulting agreement amendment with Geosyntec Consultants Inc. (previously Aspect Consulting) to support ongoing Aquifer Storage and Recovery (ASR) program and Disinfection Byproduct (DBP) Monitoring in the amount of$445,000. Implementation of online DBP monitoring is intended to reduce the level of effort involved in monitoring, limit the potential downtime of recharge operations due to isolated measurements of elevated DBPs, and allow for adaptive management of the treatment operations with respect to DBP generation. The majority of funding for this project is provided by a grant to the City from the Washington Department of Ecology's (Ecology's) Water Resources Yakima Basin Integrated Planning group in the amount of $350,000. The grant agreement was approved by Yakima City Council on January 6, 2026. The remaining funding of$95,000 will be provided by Water Operation Fund 474 to include sampling and testing of disinfection by products (DBP's) as required for verification of online analyzers. The Consulting Agreement amendment to the Disinfection Byproducts (DBP) Monitoring Study and Ongoing Aquifer Storage and Recovery (ASR) Program Support (City Contract No. 2020-075)with Geosyntec Consultants Inc. in the amount not to exceed $445,000 has been attached for City Council review. ITEM BUDGETED: Yes STRATEGIC PRIORITY 24-25: A Resilient Yakima RECOMMENDATION: Adopt Resolution. ATTACHMENTS: ASR Consulting Agreement Resolution.docx Geosyntec Contract.pdf 25 RESOLUTION NO. R-2026- A RESOLUTION authorizing a contract amendment to the DBP Monitoring Study and Ongoing ASR Program Support (City Contract No. 2020-075)in the amount of$445,000 for the ASR DBP Monitoring and Recharge Enhancement Project No. AC2506. WHEREAS, the City of Yakima operates an Aquifer Storage and Recovery (ASR) program to recharge and store domestic drinking water into the groundwater aquifer in accord with applicable Federal, State and Local permits and regulations; and WHEREAS, Geosyntec Consultants, Inc. (formerly Aspect Consulting) seeks to do additional work on a previously approved project to provide real-time monitoring of disinfection byproducts (DBP) in the domestic drinking water distribution system to optimize ASR recharge into the groundwater aquifer; and WHEREAS, Ecology has provided a $350,000 grant to design, purchase, install and implement the real-time DBP monitoring equipment as part of funding provided from the State of Washington's 2025-2027 biennial budget as part of a request for funding the Yakima Basin Integrated Plan and the City will provide $95,000 of funding for the contract amendment; and WHEREAS, the City Council had approved the Department of Ecology Grant Agreement on January 6, 2026, and determined that the grant agreement is in the best interests of residents of the City of Yakima; now, and WHEREAS, the City Council finds and determines that entering into an amendment to the 2020 contract with Geosyntec Consultants, Inc. associated with the City's ASR program for additional work to the ASR program is in the best interests of the residents of the City of Yakima and the City; now, therefore BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF YAKIMA: The City Council approves the Contract Change for DBP Monitoring Study and Ongoing ASR Program Support, an amendment to the City's 2020 contract with Aspect Consulting, and authorizes the City Manager to enter into the same. The Contract Change is attached hereto and fully incorporation by this reference. ADOPTED BY THE CITY COUNCIL this 21st day of April, 2026. Matt Brown, Mayor ATTEST: Rosalinda Ibarra, City Clerk 26 Geosyntec ' 1106N35t'Ave Yakima,WA 98902 PH 2O6-838-5843 consultants www.geosyntec.com February 27, 2026 Daniel Tiliano, Water/Irrigation Division Manager City of Yakima 2301 Fruitvale Blvd Yakima, WA 98902 Subject: Contract Change for DBP Monitoring Study and Ongoing ASR Program Support Project: City of Yakima ASR Program (City of Yakima Contract No. 2020075; Geosyntec Proj. #26005326) Mr. Daniel Tiliano: The team at Geosyntec Consultants, Inc. (Geosyntec; formerly Aspect Consulting) has been supporting the City of Yakima (City) with advancing its Aquifer Storage and Recovery (ASR) program since prior to the City being issued its first Temporary ASR Permit in 2015. We are pleased to present this letter detailing our scope, schedule, and budget to continue supporting the City with implementing its ASR program through development of online monitoring for disinfection byproduct(DBP) and other regulatory and technical support. The following section presents our understanding of the project background. The task-specific details of our work are presented throughout the remainder of this letter. PROJECT BACKGROUND The City has been exploring ASR program development since 1998 to provide supplemental water to the City during drought years. Although the City already has substantial physical and legal (water rights) capacity for ASR, operations have been limited by constraints from DBP levels and associated monitoring requirements of its current ASR reservoir permit. Under this project, the City will address these limitations and further develop its ASR program by implementing automated online DBP monitoring to demonstrate regulatory compliance over two ASR recharge cycles. Once developed, implementation of online DBP monitoring is intended to reduce the level of effort involved in monitoring, limit the potential downtime of recharge operations due to isolated measurements of elevated DBPs, and allow for adaptive management of the treatment operations with respect to DBP generation. The majority of funding for this project is provided by a grant to the City from the Washington Department of Ecology's (Ecology's) Water Resources Yakima Basin Integrated Planning group(Agreement No. WRYBIP-2527-YaWaIr-00081 referred to herein as the Grant'). 1 References to scope and deliverables refer to the Grant dated January 9,2026. engineers I scientists I innovators 27 Daniel Tilanio February 27, 2026 Page 2 Geosyntec's scope of work presented herein includes the elements of the Grant, and also includes supporting the City with completion of several elements of the Compliance Schedule included in its current ASR reservoir permit (R4-34552), including updating O&M procedures, Quality Assurance Project Plan (QAPP), annual reporting, and coordination with Ecology on permit provisions. TASKS TO BE COMPLETED Under this scope of work, Geosyntec will complete the following tasks under the key assumptions presented. Note that task numbers begin at Task 2 to align with the task numbering included in the Grant. Task 2: Purchase and Install Detectors Geosyntec will purchase and install one instrument to conduct online monitoring for trihalomethanes(THMs; a specific type of DBP) and one instrument for DBP formation potential. Work will include the following subtasks: • Coordination with equipment vendor(s) on instrument installation, operation, and maintenance, and final selection of vendor and equipment options. • Purchase of an online THM monitoring system and DBP formation potential monitor. The THM monitoring equipment is anticipated to be procured from AMS, as they are the only established manufacturer for the type of instrumentation planned for this project(e.g.,real- time THM instrumentation with colorimetric detection methods for both THMs and THM formation potential, automatic calibration, and other important requirements for the proj ect). • Installation of the respective monitoring equipment at the City's Naches water treatment plant (WTP; ASR source water treatment location) and the Gardner Well (an existing authorized ASR recharge well). With assistance from City and its contractor(s), the instrument manufacturer will install the equipment at the wellhead. The City and Geosyntec will install the DBP formation potential equipment (the UV254 detector) and, to the extent practical, integrate sensor communications with its existing equipment. • Initial integration of the DBP monitors into the City's existing infrastructure (e.g., telemetry system, as compatibility allows). Key Assumptions This proposal is based on the following key assumptions: 1. Suitable areas already exist for instrument installation (e.g., wall, cabinet, or desktop mount)within City facilities(the THM-100 is supplied in NEMA-4X electronics enclosure approximately 24inx60inx 16in), such that no new electrical work or plumbing will be required beyond connections of flexible hose and plugging equipment into a standard 110V (20 amp) outlet. engineers I scientists I innovators 28 Daniel Tilanio February 27, 2026 Page 3 2. Low voltage communications cables (4-20 mA) will be made available at the installation location(s), if the City wishes to integrate the instrumentation with its SCADA system. 3. The City's SCADA engineer or other consultant to the City will complete any required SCADA programming within the City's existing system (should the City desire system integration during this pilot phase). Deliverables Equipment noted above will be procured and installed. Other deliverables provided under this task encompass the deliverables required under Task 2 of the Grant. Task 3: QAPP Preparation, Equipment Calibration,Year 1 Implementation, and Report Following the instrument procurement and deployment under Task 2, Geosyntec will support the City with ASR recharge operations, and collect, synthesize, and analyze data from the DBP analyzers to develop a dataset and calibration curve that relates instrument measurements to laboratory water quality results. Geosyntec will complete the following work under this task: • Preparation of a draft and final QAPP that addresses data collection during this project and incorporates Ecology comments. The QAPP will address operation of the City's ASR program under its existing ASR Reservoir Permit, and the data collection required under the Grant. • Collection of up to 26 water quality samples (weekly during recharge season)for analysis of DBPs (THMs and haloacetic acids), total and dissolved organic carbon, biological and/or chemical oxygen demand (BOD/COD), and other parameters needed to assess and interpret DBP concentrations and formation potential. The final number of samples is dependent on system performance and recharge operations. • Instrument calibration, maintenance, and adaptation to field conditions. • Preparation of a summary memorandum at the conclusion of Year 1 that documents findings, learnings, updated protocols for Operations and Maintenance, and recommendations for Year 2 of recharge to be completed under Task 4. Key Assumptions 1. The QAPP will be prepared as an update to the City's existing QAPP for the ASR program (completed in 2017). 2. A single QAPP document will be prepared. 3. Calibration of the on-line monitoring equipment will be primarily completed remotely by the instrument manufacturer and no new instruments will be required. engineers I scientists I innovators 29 Daniel Tilanio February 27, 2026 Page 4 4. Laboratory analysis will be completed using a local laboratory with standard turnaround times. Deliverables Equipment noted above will be procured and installed. Other deliverables provided under this task encompass the deliverables required under Task 3 of the Grant (draft and final QAPP and Year 1 data memorandum). Task 4: Year 2 Implementation Geosyntec will assist the City with incorporating the findings from Task 3 (Year 1 recharge)into the second year of testing and implementation of the DBP monitoring system. This task will include the following subtasks: • Collection of water quality samples for analysis of DBPs (THMs and haloacetic acids), total and dissolved organic carbon, BOD/COD, and other parameters needed to assess and interpret DBP concentrations and formation potential. The actual number of samples will be based in part on the outcome of Task 3. • Coordination with the City and Ecology regarding the status of the ASR program. • Evaluation of water quality results and coordination with the City to evaluate and implement operational changes (e.g., treatment processes) to increase the benefits of ASR operations. Key Assumptions 1. Meetings with City staff to discuss recharge operations and system performance will be held virtually. 2. The number of water quality samples collected under Task 4 will be approximately 50% of those collected under Task 3. Deliverables Electronic files with water quality results (report on findings will be provided under Task 5). Task 5: Analysis and Reporting Geosyntec will prepare a report and accompanying figures summarizing the methods, results, findings, and recommendations for the ASR program and online DBP monitoring. We will also prepare a PowerPoint or similarly formatted presentation for the Yakima Basin Integrated Plan (YBIP) Groundwater Subcommittee after first workshopping report contents with the City. The report will be finalized after discussing and incorporating comments from Ecology. Key Assumptions The report will be finalized after responding to one round of respective comments from the City and Ecology and meeting participation will be virtual. engineers I scientists I innovators 30 Daniel Tilanio February 27, 2026 Page 5 Deliverables Deliverables provided under this task encompass the deliverables required under Task 5 of the Grant(draft and final report and presentation materials). SCHEDULE AND BUDGET Geosyntec will complete the services described herein under a time and materials fee structure according to Table 1 and the attached rate schedule. Note that, as previously communicated to the City, the total project costs and proposed budget exceed the Grant award, such that the City can only be reimbursed up to the total grant amount of$350,0002. Table 1. Proposed Budget Materials & Task Grant City Task Equipment Labor Total Funding Funding 2: Purchase and Install $160,000 $20,000 $180,000 $180,000 - Detectors 3: QAPP, Calibration,Year 1 Implementation and $40,000 $120,000 $160,000 $160,000 - Report 4: Year 2 Implementation $25,000 $45,000 $70,000 $70,000 5: Analysis and Reporting $35,000 $35,000 $10,000 $25,000 Total Budget by Funding Source $350,000 $95,000 Total Budget $445,000 This project will be conducted in accordance with the schedule outlined in the Grant and future amendments. Table 2 presents a tentative project schedule that aligns with the Grant deliverable due dates. 2 Ecology policy allows for reimbursement up to the task budget plus 10%of the total project cost($35,000). Task budget exceedances by more than this amount would require an amendment to the Grant agreement. engineers I scientists I innovators 31 Daniel Tilanio February 27, 2026 Page 6 Table 2. Tentative Schedule for Completion of Milestone Deliverables Task/Project Element Completion date Monitoring Equipment Installation 6/31/2026 Task 2 High level process flow diagram showing 10/1/2026 location of the analyzers Task 3 Year 1 Data Memorandum 12/31/2027 Task 4 Data collection complete 6/1/2028 Presentation to YBIP 10/1/2028 Task 5 Final Project Report 12/31/2028 CLOSING The Geosyntec team appreciates the opportunity to continue supporting the City with development of its ASR program. Immediately following notice to proceed from the City, we will begin procurement and coordination efforts. We are available at your convenience to discuss any further details you may require for this work, including scheduling and contracting details. This contract change amends Contract Order No. 1 (City of Yakima Contract No. 2020075)between Geosyntec Consultants, Inc. and its subsidiaries and affiliates and the City of Yakima dated April 15, 2020. Except as amended above, all terms and conditions of contract apply to this contract change. Sincerely, Geosyntec Consultants, Inc. Andrew Austreng, LHG Brian Petty, PE Principal Hydrogeologist Vice President, Water West Operation Attachment: Rate Schedule engineers I scientists I innovators 32 ATTACHMENT A Rate Schedule engineers I scientists I innovators 33 GeosynIec (> consultants CONFIDENTIAL GEOSYNTEC CONSULTANTS 2026 U.S. RATE SCHEDULE Rate/Hour Staff Professional $170 Senior Staff Professional $195 Professional $225 Project Professional $255 Senior Professional $290 Principal $320 Senior Principal $345 Technician I $98 Technician II $108 Senior Technician I $115 Senior Technician II $125 Site Manager I $140 Site Manager II $155 Construction Manager I $165 Construction Manager II $178 Senior Designer $220 Designer $185 Senior Drafter/Senior CADD Operator $175 Drafter/CADD Operator/Artist $155 Senior Technical Editor $178 Technical Editor $158 Senior Project Analyst $158 Project Analyst $132 Project Administrator $103 Clerical $80 Direct Expenses Cost plus 15% Subcontract Services Cost plus 15% Specialized Computer Applications(per hour) $15 Personal Automobile(per mile) Current Gov't Rate Photocopies(per page) $.09 Rates are provided on a confidential basis and are client and project specific. Unless otherwise agreed,rates will be adjusted annually based on a minimum of the BLS reported change in the average hourly earnings of all employees,engineering and drafting services. Rates for field equipment,health and safety equipment,and graphical supplies presented upon request. Construction management fee presented upon request. NW Operation US 2026 RATE B-C 34