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River Islands Development at Lathrop November 2020 <br /> Final Phase 2 Sewer Technical Report Rev 1 #6520 <br /> 3.1.2 Sewer Generation Rates— Peak Wet Weather Flow <br /> PWWF is equal to the sanitary sewer peaking factors determined in the City's Detail S-1 (see Appendix D) <br /> multiplied by each pipe segments ADWF. The peaking factors are a function of the pipe segment's ADWF <br /> and larger collection areas provide a greater capacity to attenuate flows, as peak flows generated in the <br /> upstream reaches of the system take a longer amount of time to travel downstream. The following <br /> equations summarizes the PWWF sewer generation rates required by the City's Standards. <br /> Peak Wet Weather Flows (gpd) =Average Dry Weather Flows x Sanitary Sewer Peaking Factor <br /> with the Sanitary Sewer Peaking Factor = e(-3.95xAWDF(MCD)+o.6) + 2.05 <br /> The total PWWF entering the Area A2 sewer pump station was calculated to be 6,180,211 GPD which is <br /> equivalent to the total PWWF from the River Islands Development at full buildout based on the land use <br /> exhibits provided by Odell (see Appendix A). <br /> 13 <br />