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BACKGROUND On September 6, 2022, the City Council authorized staff to suspend the PFAS Treatment and Wells Rehabilitation Project and to further evaluate water supply alternatives for the portion of water supply currently sourced via the City's groundwater pumping quota (3,500 acre-feet/year). On October 18, 2022, the City Council established a new capital improvement project called the Water Supply Alternatives Study, allocating $363,755 from the Water Fund balance to fund a professional services agreement with Brown and Caldwell (BC) in the amount of$263,755 to perform the technical scope of services, and $100,000 for as- needed legal services associated with the project. The objective of the study is to evaluate alternatives relative to the PFAS Treatment and Wells Rehabilitation Project and recommend a preferred path forward (i.e., either continuation of the project or an alternative water supply to produce 3,500 acre-feet/year). DISCUSSION To date, BC has collected and reviewed data and information from the City and Zone 7, developed a comprehensive list of water supply alternatives, confirmed a set of evaluation criteria with the Water Ad Hoc Subcommittee, and performed initial screening of alternatives. Additionally in April 2023, BC and City staff met with Zone 7's General Manager and staff to solicit initial feedback on the shortlisted alternatives requiring partnership with Zone 7 and provided this feedback to the Water Ad Hoc Subcommittee. Following this, Zone 7's Water Resources Subcommittee provided a recommendation to be shared with the full Zone 7 Board of Directors toward Zone 7 and the City working collaboratively to explore these shared alternatives. The project progress to date is summarized below by task. 1. Project Management ONGOING BC will provide project management services including oversight of project staff, budget, and schedule. This is an ongoing task related to management of the study. 2. Information Collection and Review COMPLETED The project team has gathered and reviewed data and information from the City and Zone 7, including Zone 7's groundwater model. 3. Alternatives Development COMPLETED BC developed a list of water supply alternatives, which was reviewed and confirmed by the Water Ad Hoc Subcommittee and shared with Zone 7 for feedback. This list was intended to be comprehensive, and alternatives that were not feasible or that had greater cost and lower benefit relative to the PFAS Treatment and Well Rehabilitation Project were eliminated through an initial screening step. Alternatives (or combinations of alternatives that can produce 3,500 acre-feet/year) that have passed the initial Page 2 of 4