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WATER SYSTEM MANAGEMENT PLAN OCTOBER 2024 / CAROLLO <br />CITY OF PLEASANTON WATER SYSTEM MANAGEMENT PLAN 4 <br />1.3.1 Water Supply Facilities <br />The City's water supply comes from two sources: City owned groundwater supply wells and turnout <br />connections to the Zone 7 Water Agency (Zone 7). The City has an allocation of 3,500 ac-ft of <br />groundwater. However, the City is not currently utilizing all of that allocation due to Wells, 5, 6 and 8 <br />having measurable amounts of PFAS contamination. In addition, Well 7 became inoperable in the 1990s <br />due to turbidity and structural settlement of the building. All water sources are disinfected and fluoridated <br />before delivery to customers. <br />The Turnouts from Zone 7 are summarized in Table 1. <br />Table 1 Water Supply - Zone 7 Turnouts <br />Turnouts Type Status <br />Turnout 1 Flow Control Active <br />Turnout 2 Flow Control Active <br />Turnout 3 Flow Control Active <br />Turnout 4 Flow Control (Boosted in 2025) Active <br />Turnout 5 Flow Control Active <br />Turnout 6 Boosted Active <br />Turnout 7 Boosted Active <br />Water supply from Zone 7 comes from three primary sources: State Water Project supply via the South <br />Bay Aqueduct, water from local watersheds via Lake Del Valle, and groundwater within the Livermore- <br />Valley Groundwater Basin. Surface water sources are treated at both the Paterson Pass and Del Valle <br />Water Treatment Plants (WTPs). <br />1.3.2 Water Distribution Pipelines <br />The City has approximately 339 miles of water system pipelines ranging from 2 to 27 inches in diameter. <br />The City's pipeline materials vary from asbestos cement (AC), cast iron (CI), ductile iron (DI), polyvinyl <br />chloride (PVC), steel, and welded steel. The breakdown of pipeline diameters, materials and age can be <br />found in the Water Distribution System Capacity Master Plan (WDSCMP Akel, October 2024) <br />1.3.3 Water Booster Stations <br />The City’s water booster stations are summarized in Table 2. For further details on the booster stations <br />refer to the WDSCMP. <br />Table 2 Booster Station Inventory <br />Pump Station Source Pressure Zone Destination Pressure Zone <br />Longview (Foothill 1) Lower 770 <br />Foothill 2 Lower 510 <br />Dublin Canyon Lower Dublin Canyon <br />Laurel Creek Lower Moller 770 <br />Vineyard Lower Bonde <br />Page 435 of 658