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River Islands Development at Lathrop January 2021
<br /> Final River Islands Potable Water Technical Report—Rev 3 #6520
<br /> Table 2-4: River Islands— Phase I and II Maximum Day Demands (Peaking Factor= 1.7)
<br /> MDD Demand MDD
<br /> Phase I &II ADD Demand Factor MDD (GPM)
<br /> (Total) Factor (GPD per DU or (GPD) W/5%
<br /> No.of Units (GPD per DU or Acre) Acre) W/5%Loss Loss
<br /> Land Use or Acreage W/5%Loss Factor W/5%Loss Factor Factor Factor
<br /> Low Density Residential (per DU) 7,191 330.8 562.3 4,043,320 2,808
<br /> Medium Density Residential (per DU) 3,636 246.8 419.5 1,525,211 1,059
<br /> High Density Residential (per DU) 4,183 141.8 241.0 1,007,998 700
<br /> Commercial (per acre) 287.2 903.0 1,535.1 440,858 306
<br /> Industrial (per acre) 0.0 1,260.0 2,142.0 0 0
<br /> Parks(per acre) 65.1 2,572.0 4,373.3 284,830 198
<br /> Schools/Institutional (per acre 61.8 1,575.0 2,677.5 165,470 115
<br /> Subtotal 7,467,686 5,186
<br /> Table 2-5: River Islands— Phase I and II Peak Hour Demands (Peaking Factor= 3.4)
<br /> PHD Demand PHD
<br /> Phase I &II ADD Demand Factor PHD (GPM)
<br /> (Total) Factor (GPD per DU or (GPD) W/5%
<br /> No. of Units (GPD per DU or Acre) Acre) W/5%Loss Loss
<br /> Land Use or Acreage W/5%Loss Factor W/5%Loss Factor Factor Factor
<br /> Low Density Residential (per DU) 7,191 330.8 1,124.6 8,086,639 5,616
<br /> Medium Density Residential (per DU) 3,636 246.8 839.0 3,050,422 2,118
<br /> High Density Residential (per DU) 4,183 141.8 482.0 2,015,997 1,400
<br /> Commercial (per acre) 287.2 903.0 3,070.2 881,715 612
<br /> Industrial (per acre) 0.0 1,260.0 4,284.0 0 0
<br /> Parks(per acre) 65.1 2,572.0 8,746.5 569,660 396
<br /> Schools/Institutional (per acre 61.8 1,575.0 5,355.0 330,939 230
<br /> Subtotal 14,935,372 105372
<br /> 2.4 Fire Flow Requirements
<br /> Fire flows are required to meet the Lathrop-Manteca Fire Protection District(LMFPD) requirements and as
<br /> outlined in Table 4-2 in the City's Standards (see Appendix D &Table 2-6). The required fire flows must
<br /> be provided in conjunction with MDDs for a minimum 2-hour duration, while maintaining a system-wide
<br /> residual pressure of 20 psi (including at the flowing hydrant).
<br /> Table 2-6: Fire Flow Requirements
<br /> Fire Flow Required
<br /> Land Use (GPM)
<br /> Low Density Residential 1,250
<br /> Medium Density Residential 1,250
<br /> High Density Residential 2,000
<br /> Commercial 3,000
<br /> Industrial 4,000
<br /> 10
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