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River Islands Development at Lathrop January 2021 <br /> Final River Islands Potable Water Technical Report-Rev 3 #6520 <br /> Table 6-2: Minimum Preliminary Improvement Implementation Schedule <br /> is Parameter 2014-2020 2020-2025 2025-2030 2030-2035 2035-2040 <br /> Firm Pumping <br /> Capacity 2129' 3,4762 5,8553 7,9414 10,3724 <br /> Requirement <br /> GPM <br /> River Islands <br /> Installed Firm 6,000 10,000 14,000 14,000 14,000 <br /> Pumping <br /> Capacit <br /> No Improvements No Improvements <br /> required as the PW required as the PW <br /> storage requirements storage requirements <br /> Firm Pumping will dictate the will dictate the <br /> Capacity improvement schedule. improvement schedule. None None None <br /> Recommended Recommend installing Recommend installing <br /> Improvement the future large booster the 4,000 GPM Phase II <br /> pump at the Phase I BPS when the storage <br /> BPS when the tanks are capacity requirement is <br /> constructed reached <br /> Potable Water <br /> Storage 1,266,38610 2,892,9206 4,710,6037 6,317,7927 8,067,6317 <br /> Requirement <br /> (Gallons)' <br /> River Islands <br /> Installed Potable 1,500,000 4,600,000 8,320,000 8,320,000 8,320,000 <br /> Water Storage <br /> Capacity <br /> Install the future 1.5& <br /> 1.6 MG tanks at Phase I <br /> BPS. Phase II BPS site <br /> shall be completed <br /> Potable Water Recommended to start in the beginning of <br /> Storage Capacity Start the design of the design and finish 2025-2030 <br /> Recommended future 1.5&1.6 MG the construction of the timeframe as the None None <br /> Improvement tanks at Phase I BPS Phase II BPS Site development will <br /> towards the start of exceed the <br /> 2025-2026 as the installed capacity <br /> projected development of Phase I BPS <br /> will excess Phase I BPS <br /> site capacity of 4.6 MG <br /> Assumptions: <br /> 1. Since only low and medium density residential land uses will be constructed and connected during this timeframe,the fire <br /> flow requirement for the site is 1,250 GPM. From 2014-2020,the MDD+ 1,250 GPM FF is the governing firm pumping <br /> capacity requirement. <br /> 2. With no commercial or high density residential land uses constructed,the PHD is the governing firm pumping capacity <br /> requirement during this time frame. <br /> 3. Construction of the high density and commercial land uses will increase the fire flow requirement(specifically 3,000 GPM <br /> for commercial). Therefore,the MDD+3,000 GPM fire flow will be the governing firm pumping capacity requirement <br /> during this time frame. <br /> 4. Peak Hour Demand is the governing firm pumping capacity requirement during this time frame. <br /> 5. Installed firm pumping and PW storage capacity follows the previous time frames recommended improvement schedule <br /> (i.e.assumes recommended improvements were constructed). <br /> 6. Since only low and medium density residential land uses will be constructed during this timeframe,the fire flow storage <br /> requirement will be for a low and high density residential land uses(390,000 gallons). <br /> 7. With the construction of commercial land uses,the fire flow storage requirement increases to 600,000 gallons. <br /> 8. See Section 3.1 for the potable water storage requirements. <br /> 9. See Section 2.5 for the potable water firm pumping capacity requirements. <br /> 10. The City has allowed River Islands to utilize the city-wide fire storage capacity until the future 1.5 and 1.6 MG storage <br /> tanks are installed at the Phase I BPS and storage site. As shown above,the current 2014-2020 potable water storage <br /> requirement is equal to the approximate maximum day demand of 1,266,386 GPD(no dedicated fire storage required <br /> within River Islands). <br /> 41 <br />