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2024.10.14_ CK Yelm STEP SizingDesign Flow Rate: 325 gpd/toilet 8 toilets Total = 2,600 gpd Liquid Detention Volume: 2 x peak day flow (per DOE Orange Book C1-10.1.5.) 2,600 gallons 5,200 gallons Working Volume: Working Volume must exceed the difference between the peak influent flow and discharge of the pump over the peak duration. QDesign * ((18+sqrt(P)/(4+sqrt(P))) where P = Population in Thousands (2925 gpd) * (18+sqrt(0.4))/(4+sqrt(0.4)) / 24hrs/day = 8.17 gpm 10 gpm per P.110 0511 OSI Pump Peak Discharge > Peak Inflow ---> Okay Working Volume = 0 gallons Storage Volume: Storage Volume shall equal 24 hours of Peak Daily Inflow for emergency storage. 2,600 gpd Total Tank Volume Required: Sum of Liquid Detention Volume, Working Volume, and Storage Volume. Liquid Detention Volume not to exceed 65% to 75% of total volume. 5,200 gallons 58% 0 gallons 0% 2,600 gallons 29% 7,800 gallons 3 x 3,000 gallon tank Total Volume = STEP Sewer Tank Sizing Calculation 10/14/2024 = Assumed Peak Discharge = Storage Volume = Liquid Detention Volume = Working Volume = Storage Volume = Sizing per Ciriteria for Sewage Works Design (DOE Orange Book), Section C1-10.1.5. Peak Daily Flow = Minimum Liquid Volume = Minimum Liquid Volume = Assumed Peak Inflow =