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Section 1: Introduction Water Supply Alternatives Study 1-2 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 As of September 2022, the City had progressed its PFAS Treatment Project through 50 percent design, and the project was in its final phase of design; however, given the increasing costs of PFAS treatment, regulatory uncertainty, and long-term operational commitments, the City decided to pause and consider other water supply alternatives before proceeding with the PFAS Treatment Project. On September 6, 2022, the City Council authorized staff to suspend the PFAS Treatment Project, and in October 2022, the City Council established the Water Supply Alternatives Study (Study) as a new capital improvement project and contracted Brown and Caldwell (BC) to support City staff in conducting the Study. 1.2 Purpose The Study's purpose is two-fold: •Identify and evaluate alternatives relative to the PFAS Treatment Project for the portion of water supply that has been obtained using the City’s GPQ of 3,500 AFY and is critical for meeting peak monthly/daily demands1. •Inform the path forward, including whether the City should proceed with the PFAS Treatment Project or pursue an alternative to produce 3,500 AFY of potable water supply and meet peak monthly/daily demands. The Study is not intended to consider alternatives that would replace or reduce the City’s other supply sources (i.e., Zone 7 purchases or recycled water), which are assumed to remain in place. 1.3 Approach to Study In close coordination with City staff, BC engaged City Council and met with Zone 7 staff while conducting the Study. Feedback from Zone 7 informed the evaluation of water supply options, as several require input and/or Board approval from Zone 7. 1.3.1 City Council Engagement City Council formed a Water Supply Alternatives Study two-person Ad Hoc Subcommittee (Ad Hoc Subcommittee) to oversee the Study’s progression and inform its direction. The Ad Hoc Subcommittee members are Pleasanton Mayor, the Honorable Karla Brown; and City Councilmember Jeff Nibert, who stepped in when Councilmember Kathy Narum’s term ended in December 2022. BC and City staff met with the Ad Hoc Subcommittee eight times over the Study’s duration, and presented updates at public City Council meetings approximately quarterly, again through the Study’s duration (Figure 1-1). 1 From April 2019 to October 2022, Pleasanton’s maximum weekly groundwater pumping rate was 6.2 million gallons per day (mgd) to meet peak water demands in August 2020.