5/10/2018 4:34:34 PM
5/10/2018 11:19:17 AM
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THE CITY OF 19 <br /> ••.••I CITY COUNCIL AGENDA REPORT <br /> pL•EASANTON. <br /> May 15, 2018 <br /> Operations Services <br /> TITLE: PRESENTATION ON THE JOINT TRI-VALLEY POTABLE REUSE <br /> TECHNICAL FEASIBILITY STUDY <br /> SUMMARY <br /> The Joint Tri-Valley Potable Reuse Technical Study is a City Council work plan item. <br /> The goal of this study is to evaluate the technical options for potable reuse as a possible <br /> strategy for diversification of the region's water supply and having a more reliable <br /> source of water during periods of extreme drought and/or other existing water supply <br /> limitations. This presentation is designed to provide the City Council with an update of <br /> the work performed to date, identify possible next steps for further exploration of potable <br /> reuse in partnership with regional agencies, and to solicit feedback from the City <br /> Council regarding continued participation in this regional effort. <br /> On October 4, 2016, City Council authorized the City Manager to initiate a Task Order <br /> with Carollo Engineers under the Tri-Valley Intergovernmental Reciprocal Services <br /> Master Agreement to perform the Joint Tri-Valley Potable Reuse Technical Feasibility <br /> Study (Study). The Study was requested by the Tri-Valley Water Liaison Committee to <br /> explore diversification of the water supply portfolio in the Tri-Valley and enhance long- <br /> term water supply reliability. Councilmembers Brown and Narum currently represent the <br /> City on this Committee; staff representation includes the City Manager and Director of <br /> Operations and Water Utilities. <br /> The Study is now complete and finds that potable reuse is technically feasible. In a <br /> bookend approach, six alternative projects were evaluated with a varying water yield of <br /> 5,500 to 10,000 acre-feet per year. The capital and operating cost ranges for these <br /> alternatives are $2,200 to $2,500 per acre-foot. At buildout, these costs may add $10 to <br /> $15 per month on the average water bill. The Study also conceptually outlines next <br /> steps. <br /> It's important to note that continuation in the next steps does not obligate the City to <br /> participate in the support or deployment of a potable reuse system. Rather, it ensures <br /> that additional technical investigation of potable reuse options are completed and further <br /> evaluates how potable reuse improves regional water supply reliability compared to <br /> other supply options. <br />
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