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14 <br /> THE CITY OF <br /> CITY COUNCIL AGENDA REPORT <br /> PL£ASANTON <br /> September 19, 2023 <br /> Public Works <br /> TITLE: RECEIVE UPDATE ON WATER SUPPLY ALTERNATIVES STUDY AND <br /> PRELIMINARY RESULTS INDICATING TWO NEW WELLS AS THE <br /> PREFERRED WATER SUPPLY ALTERNATIVE PROJECT <br /> SUMMARY <br /> On September 6, 2022, the City Council authorized staff to suspend the PFAS Treatment <br /> and Wells Rehabilitation Project and to evaluate further water supply alternatives for the <br /> portion of water supply currently sourced via the City's groundwater pumping quota <br /> (3,500-acre feet/year). In September 2022, a Water Supply Alternatives Ad Hoc <br /> Subcommittee was formed; in October 2022, the City Council established a new Water <br /> Supply Alternatives Study capital improvement project and subsequently contracted with <br /> Brown and Caldwell (BC) to support the project's development. <br /> To date, BC has collected and reviewed data and information from the City and Zone 7, <br /> developed a comprehensive list of water supply alternatives, confirmed evaluation criteria <br /> with the ad hoc subcommittee, and performed initial screening of alternatives. BC also <br /> scored options against evaluation criteria, performed a sensitivity analysis, prepared <br /> preliminary cost estimates, and identified a preferred alternative. A comprehensive and <br /> detailed review of alternatives has preliminarily concluded that the City can continue to <br /> serve high-quality groundwater and achieve the most significant benefit at the lowest cost <br /> by advancing with implementing two new wells to be located in the Bernal subbasin <br /> outside of the influence of PFAS. This report and presentation share the preliminary <br /> results of the study. Consideration of the adoption of the final study results is planned for <br /> the October 17, 2023, City Council Meeting. <br /> RECOMMENDATION <br /> Receive an update on the Water Supply Alternatives Study and preliminary results indicating <br /> two new wells as the selected water supply alternative project. <br /> FINANCIAL STATEMENT <br /> There is no fiscal impact associated with this update. Funding for this project was previously <br /> approved by the City Council, and the project is on schedule. If adopted, the implementation <br /> of two new wells will have a fiscal impact on water rate revenues which can be analyzed <br /> after the conclusion of the current rate study. <br /> Page 1 of 6 <br />