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Table of Contents Water Supply Alternatives Study iii DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. Water Supply Alternatives Study-Draft Report.docx List of Figures Figure 1-1. City Council engagement throughout the Pleasanton Water Supply Alternatives Study ..1-3 Figure 1-2. Multi-step process for identifying and evaluating potential water supply alternatives.....1-5 Figure 2-1. Alternative 1 (Baseline Project) overview.............................................................................2-4 Figure 2-2. Centralized treatment facility isometric................................................................................2-5 Figure 2-3. Alternative 3 (two new wells) overview.................................................................................2-6 Figure 2-4. Pleasanton’s well pumping over time (April 2019-October 2022).....................................2-8 Figure 3-1. Relative benefit scores of each alternative..........................................................................3-2 Figure 3-2. Capital cost estimating accuracy improves as the level of project definition improves ...3-3 Figure 3-3. Capital cost estimates and ranges for each alternative......................................................3-4 Figure 3-4. Estimated annual O&M costs for each alternative..............................................................3-4 Figure 3-5. Benefit score and estimated annual cost for each alternative...........................................3-5 Figure 4-1. Draft timeline for implementing Alternative 3 (Two New Wells) .........................................4-5 Figure 4-2. Draft timeline for contingency plan to pivot from implementing Alternative 3 (Two New Wells) to Alternative 2 (Reduced Baseline).......................................................................................4-9 List of Tables Table 2-1. Potential Water Supply Options for Screening ......................................................................2-1 Table 2-2. Results of Initial Screening of Potential Water Supply Options............................................2-2 Table 3-1. Evaluation Criteria Definitions and Weightings.....................................................................3-1 Table 3-2. Estimated Costs by Alternative...............................................................................................3-5 Table 3-3. Tradeoffs Associated with Shortlisted Alternatives...............................................................3-6