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17 <br /> THE CITY OF <br /> CITY COUNCIL AGENDA REPORT <br /> its <br /> PLEASANTON, <br /> October 17, 2023 <br /> Public Works <br /> TITLE: ACCEPT REPORT ON THE WATER SUPPLY ALTERNATIVES STUDY, <br /> APPROVE THE DESIGN AND CONSTRUCTION OF TWO NEW WELLS AS <br /> THE PREFERRED WATER SUPPLY ALTERNATIVE, ESTABLISH A NEW <br /> CAPITAL IMPROVEMENT PROJECT — TWO NEW CITY WELLS (WELLS 9 <br /> & 10 AND ASSOCIATED PIPELINES) CIP NO. 24174, AND APPROPRIATE <br /> FUNDS FROM THE WATER FUND <br /> SUMMARY <br /> On September 6, 2022, the City Council authorized staff to suspend the PFAS <br /> Treatment and Wells Rehabilitation Project and to evaluate further water supply <br /> alternatives for the portion of water supply currently sourced via the City's groundwater <br /> pumping quota (3,500-acre feet/year). In September 2022, a Water Supply Alternatives <br /> Ad Hoc Subcommittee (Ad Hoc Subcommittee) was formed; in October 2022, the City <br /> Council established a new Water Supply Alternatives Study capital improvement project <br /> and subsequently contracted with Brown and Caldwell (BC) to support the project's <br /> development. <br /> Staff worked with BC and the Ad Hoc Subcommittee to collect and review data and <br /> information from both the City and Zone 7 Water Agency. BC developed a comprehensive <br /> list of water supply alternatives, established and confirmed evaluation criteria with the Ad <br /> Hoc Subcommittee, and performed initial screening of alternatives. Following discussions <br /> with the Ad Hoc Subcommittee, BC also scored options against evaluation criteria, <br /> performed a sensitivity analysis, prepared preliminary cost estimates, and identified a <br /> preferred alternative. A comprehensive review of alternatives has preliminarily concluded <br /> the City can continue to serve high-quality groundwater and achieve the most significant <br /> benefit at the lowest cost by advancing the implementation of two new wells to be located <br /> in the Bernal subbasin outside of the influence of PFAS. A presentation to share <br /> preliminary results of the study along with a recommendation to pursue the two new wells <br /> option was presented to the City Council on September 19, 2023. <br /> RECOMMENDATION <br /> Staff recommends the City Council: <br /> 1. Accept the Water Supply Alternatives Study Draft Final Report October 12, 2023 <br /> 2. Approve proceeding with planning and developing two new wells as the preferred <br /> water supply alternative, including evaluating a joint project with Zone 7 Water Agency <br /> 3. Establish anew Capital Improvement Project— Two New City Wells (Wells 9 & 10 <br /> and Associated Pipelines) CIP No. 2417 <br /> Page 1 of 8 <br />