14 ATTACHMENT 1 EXHIBIT A - Laserfiche WebLink

Chapter 6 Water Supply Characterization THE CITY OF PL£ASANTON However, Zone 7 is pursuing several water supply projects to address potential future supply deficits as SWP reliability declines and Zone 7's service area population grows. These projects include reliability improvements for existing supplies and new supplies. Zone 7's "new supply" projects are described below. A complete list of potential programs and projects, along with additional detail, is available in Zone 7's 2019 WSE Update and 2020 UWMP. 6.2.8.1 Bay Area Regional Desalination Project Brackish water desalination for Zone 7 would be accomplished through a joint venture among Bay Area water agencies—Contra Costa Water District (CCWD) and potentially EBMUD, the San Francisco Public Utilities Commission (SFPUC), Zone 7, and Valley Water—together known as the BARDP. This project is shown on Figure 6-6 and would involve constructing a regional brackish water treatment plant in eastern Contra Costa County producing 10-20 MGD. Water would be diverted using CCWD's Mallard Slough Pump Station. Using an existing water right license and permit, both held by CCWD, and/or a new water right, Zone 7 could potentially receive up to 5,600 AFY. Zone 7 could take delivery of this new water supply through a reliability intertie with EBMUD or through the Delta/SBA by exchanging water with CCWD. Furthermore, this project could potentially provide a new water supply component for the Los Vaqueros Reservoir Expansion project, which will expand the existing reservoir and connect it to the SBA and the California Aqueduct. There has been recent renewed interest in desalination as part of the Bay Area Regional Reliability Partnership, and there may be new developments in the near-term. The water yield of the project is being re-evaluated, and the participating agencies may change. The BARDP is still in the planning phase, and there is no formally approved project at this time. If a project is approved over the next few years, it could be in service by 2030. In Zone 7's 2020 UWMP, 5,000 AFY was assumed as the total potential yield from BARDP and/or potable reuse (described in Section 6.2.8.3) with either or both systems operational by 2030. As noted above, BARDP water could potentially be conveyed through a new intertie supplying the west side of Zone 7's transmission system. This mode of delivery provides an alternative conveyance not subject to Delta outages. WEST YOST 6-25 City of Pleasanton 2020 Urban Water Management Plan May 2021