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Pleasanton and Zone 7 find joint groundwater wells feasible; staff to return with cost comparison
Summary
City staff and Zone 7 presented a Phase 1 feasibility study finding a joint groundwater facility at Tennis and Hansen parks technically feasible, meeting a 7,000 acre-foot drought-year target; estimated joint construction cost is about $42.3 million and staff will return with a March/April analysis comparing joint vs. independent options.
Pleasanton city staff and Zone 7 officials told the City Council on Feb. 3 that a joint groundwater facility in the Bernal Subbasin is technically feasible and could replace lost production from Wells 5, 6 and 8.
Public Works Director Su Chin Yang and Utilities Planning Manager Todd Yamelo summarized the Phase 1 feasibility study, saying test wells at Tennis Park, Hansen Park and Del Prado Park produced water that met California Title 22 requirements and were non-detect for the primary PFAS contaminants PFOS and PFOA. Yamelo said two of four evaluated build alternatives met a mandatory reliability threshold of 7,000 acre-feet in a drought year (3,500 acre-feet for Pleasanton and 3,500 for Zone 7). The preferred option is two wells at Tennis Park and Hansen Park, which…
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