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EXITI BIT B <br /> 7 . 03 SANITARY SEWER <br /> A. Design Flow <br /> 1 . For subdivisions , sewers shall be designed for an <br /> average daily flow of 100 gallons per capita per day . <br /> 2. For design purposes , each subdivision lot shall <br /> have 3 . 5 persons . <br /> 3 . Sewage from commercial and industrial developments <br /> will require higher factors for average daily flow. <br /> 4 . Laterals and sub-mains shall be designed for <br /> capacities of not less than four ( 4 ) times the <br /> average daily sewage flow, when flowing full . <br /> 5 . Main and outfall sewers shall be designed for <br /> capacities of not less than 2 . 5 times the average <br /> daily flow, when flowing full . <br /> B. Hydraulics <br /> 1. Design calculations shall be based upon the <br /> Manninq' s formula using the "n" value of 0 . 013 . <br /> The following are minimum allowable slopes : <br /> Sewer Size Minimum Slope , ft ./ft . <br /> 6" 0 . 0065 <br /> 8" 0 . 0040 <br /> 10" 0 . 0028 <br /> 12" 0 . 0022 <br /> 2 . Sanitary sewers shall be designed to provide a <br /> minimum velocity of two feet per second when <br /> flowing full . <br /> k <br /> 4R <br /> hog _ _ <br />