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River Islands Development at Lathrop January 2021 <br /> Final River Islands Potable Water Technical Report—Rev 3 #6520 <br /> Including the City required equalization and emergency storage volumes, and assuming the maximum fire <br /> storage requirement of 0.60 MG, the total Phase I and II River Islands PW Storage requirement is 8.1 MG <br /> or 8,067,686 gallons. <br /> Table 3-2: River Islands Phase I and II —Total Potable Water Storage Requirement <br /> Volume <br /> Storage Capacity Requirement (gallons) <br /> Equalization Storage 1,866,922 <br /> Emergency Storage 5,600,765 <br /> Fire Storage 600,000 <br /> Total River Islands Potable Water Storage Requirement 8,067,686 <br /> 3.2 Potable Water Storage Requirements — Phase I City of Lathrop Potable Water Storage and <br /> Booster Pump Station at River Islands <br /> The Phase I BPS site was initially constructed with a single 1.5 million gallons (MG), 106-foot diameter, <br /> welded steel storage tank with provisions for future 1.5 MG and 1.6 MG tanks. At final buildout, the site <br /> would provide a total of 4.6 MG of PW storage. The proposed welded steel tanks should be designed and <br /> installed with the same hydraulic parameters (working height, overflow elevations etc.) as the existing 1.5 <br /> MG, 106-foot diameter tank. This will prevent excessive short circuiting between the tanks and or additional <br /> infrastructure to accommodate different working heights. <br /> 3.3 Potable Water Storage Requirements — Proposed Phase II City of Lathrop Potable Water <br /> Storage and Booster Pump Station at River Islands <br /> The Phase 11 BPS site will be required to provide an additional 3.47 MG to meet the City's storage <br /> requirements. Two additional 1.86 MG, 115-foot diameter, welded steel tanks are recommended for the <br /> Phase 11 BPS site. The tanks shall utilize the same hydraulic parameters as Phase I BPS site for <br /> commonality purposes and to reduce the visual impact of the additional tanks. <br /> 14 <br />