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ATTACHMENT 1 Tri-Valley Potable Reuse Preliminary Studies and Community Outreach and Education Background In May 2018,the partners completed the Joint Tri-Valley Potable Reuse Technical Feasibility Study, which demonstrated that it was technically feasible for a joint Tri-Valley Potable Reuse project to meet 7% - 15% of the build-out water demands of the Tri-Valley based on approved General Plans for the City of Livermore,the City of Pleasanton, the City of Dublin, and the City of San Ramon. The 2019 Water Supply Evaluation Update (2019 WSE Update) completed by Zone 7 Water Agency (Zone 7) in April of 2019 reaffirmed and clarified the need to pursue water supply options to enhance long-term water supply reliability for the Livermore-Amador Valley. Potential future water supply, conveyance, and water storage options identified in the 2019 WSE Update include Sites Reservoir, Los Vaqueros Reservoir, potable reuse, short- and long-term water transfers,the California WaterFix (since renamed the Delta Conveyance), and regional desalination. At the July 24, 2019 meeting of the Tri-Valley Water Liaison Committee—which includes elected representatives from the cities of Dublin, Livermore, Pleasanton, San Ramon, Dublin San Ramon Services District (DSRSD), and Zone 7, as well as corporate representation by the California Water Service Company—discussed and supported further study of a regional potable reuse project. The Committee determined that joint collaborative efforts by the Tri-Valley water agencies should be undertaken to: 1) further technical and institutional study of potable reuse, 2) continue to evaluate other water supply reliability options, and 3) develop a community outreach/engagement program to educate the Tri-Valley residents and businesses on the region's water supply challenges and potential solutions. Committee representatives from the cities of Pleasanton and Livermore, Dublin San Ramon Services District, and Zone 7 expressed support for joint funding of such efforts. The California Water Service Company, a private investor-owned utility, may become a partner in sharing the costs of further study at a later time. Overview of Task Order As part of its core mission, Zone 7 is responsible for assuring a reliable and sustainable water supply for the Tri-Valley. In fulfillment of this mission, Zone 7 is proceeding with a number of studies and programs, including a regional water demand study, a 2020 update of the Water Supply Evaluation,the Zone 7 2020 Urban Water Management Plan, as well as participation in Sites Reservoir, Los Vaqueros Reservoir Expansion, Delta Conveyance,the Bay Area Regional Desalination Project. Further studies to evaluate a regional potable reuse project will require collaboration, coordination, and consultation among the Tri- Valley water agencies. The funding water agencies ("partners" in this Task Order) desire to work in close partnership on further technical studies in support of a regional potable reuse project as well as a community outreach/engagement program on the need to bolster the Tri-Valley's water supply reliability.