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5. Determine sludge tank size: <br />Allow for 2 cu.ft. of sludge tank volume per 100 gallon flow. <br />Volume = 8,700 gpd x 2 cu.ft./100 gal/day x 7.48 gal/cu.ft. = 1,302 gallons <br />The following table compares the calculated plant component size to the component <br />size which will actually be used: <br />Component <br />Air Pumps <br />Aeration Chamber <br />Clarifier Tank <br />Chlorine Contact Tank <br />Sludge Holding Tank <br />Calculated Size <br />30.26 CF6.A <br />10,347 gal <br />2,175 gal <br />408 gal <br />1,302 gal <br />Actual Size <br />to be used <br />200 CFP4 <br />20,000 gal <br />3,334 gal <br />417 gal <br />1,500 gal <br />Sewerline Sizing <br />Peak Flow <br />62 showers x 3.33 gpm = <br />8 toilets x 5 gpm = <br />8 sinks x 2 gpm = <br />2 fountains x 0.5 gpm = <br />Peak = <br />Influent Line <br />Determine size of sewerline that will handle 264 gpm. <br />Q (peak) = 264 gpm = 0.59 cfs <br />n = 0.013 <br />s = 0.011 ft/ft <br /> <br />Try 8" pipe <br />Q (8") = 1.486/0.013 (0.35)(0.318)2/3 (O.OII)1/2 <br />Q (8") = 1.95 cfs <br />Q (8")> Q(peak) <br />V (peak) = 0.59/0.35 = 1.70 fps <br />Effluent Line <br />n = 0.013 <br />s = 0.0047 <br />Q(8") = 1.486/0.013 (0.035)(0.318)2/3(0.0047)1/2 <br />Q(8") = 1.28 cfs <br />Q(8")> Q(peak) <br />V(peak) = 0.59 cfs/0.35 ft2 = 1.70 fps <br />-4- <br />207 gpm <br />40 gpm <br />16 gpm <br />1 eom <br />264 gpm <br />Use 8" <br />Ilse 3" <br />