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EVALUATION OF GROUNDWATER SUPPLY ALTERNATIVES WITHIN BERNAL SUBBASIN <br />APRIL 2026 / FINAL / CAROLLO <br />CITY OF PLEASANTON 7 <br />SECTION 3 ALTERNATIVE 2 – JOINT PROJECT <br />3.1 Project Overview <br />Alternative 2 consists of a joint project between the City and Zone 7 to develop new groundwater supply <br />in the Bernal Subbasin. This alternative assumes the City and Zone 7 will share costs to both construct and <br />operate and maintain two new groundwater wells located at Tennis Park and Hansen Park, a transmission <br />main connecting the new wells to the Zone 7 Hopyard Chloramination Facility, and upgrades to the <br />Hopyard Chloramination Facility. Zone 7 would own and operate these facilities as part of its overall water <br />supply system, and the City would receive its GPQ from Zone 7 via turnouts. These joint groundwater <br />supply improvements are described in the Regional Groundwater Facilities Feasibility Study prepared by <br />LSCE and Carollo in December 2025. Refer to Appendix E for details of the report. <br />This alternative also requires improvements to the City’s distribution system to convey flow to customers. <br />Since all flow including the City’s GPQ would be conveyed through turnouts, the distribution system <br />improvements for Alternative 2 are identical to Alternative 1. <br />Figure 4 shows an overview of City distribution improvements and Figure 5 shows an overview of joint <br />groundwater supply improvements. <br /> <br />Source: Background water system map presented in Groundwater Supply Alternatives Hydraulic Analysis <br />Results package No.1 Revised (November 2025) by Akel Engineering Group, Inc. <br />Figure 4 Alternative 2 – Overview of City Distribution Improvements