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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 to develop and analyze water supply alternatives, allocating $363,755 from the Water Fund balance to fund a professional services agreement with Brown and Caldwell 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 project and recommend a preferred path forward (i.e., either continuation of the PFAS treatment project or an alternative water supply to produce 3,500 acre- feet/year). DISCUSSION To date, Brown and Caldwell has collected and reviewed data and information from the City and Zone 7, developed a comprehensive list of water supply alternatives, and confirmed a set of evaluation criteria with the Water Ad Hoc Subcommittee. The project progress to date is summarized below by task. 1. Project Management ONGOING Brown and Caldwell 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 Brown and Caldwell developed a preliminary list of water supply alternatives, which was reviewed and confirmed by the Water Ad Hoc Subcommittee and shared with Zone 7 for feedback. The list of alternatives is attached for reference and includes additional alternatives offered by Zone 7. This list is intended to be comprehensive, and alternatives that are not feasible or that have greater cost and lower benefit relative to the PFAS Treatment and Well Rehabilitation Project will be eliminated through an initial screening step. Alternatives (or combinations of alternatives that can produce 3,500 acre-feet/year) that pass this initial screening will be evaluated in further detail, based on the criteria developed under Task 4. 4. Alternatives Evaluation IN PROGRESS Task 4, which includes most of the technical work to be performed during this study, is underway. Based on feedback from the Water Ad Hoc Subcommittee, Brown and Caldwell refined the evaluation criteria, which were confirmed by the subcommittee in January 2023. The list of criteria with definitions is attached. As a next step, Brown and Caldwell will work with the subcommittee to assign relative weights to the criteria and Page 2 of 3