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t <br />m • <br />4 <br />I <br />rV <br />1-5 <br />Source of <br />sewage Unit <br />Gallons per day <br />Average <br />per unit <br />Maximum <br />YMCA/YWCA Member 33 33 <br />Country Clubs <br />No meals Member 22 22Meals & Showers Member 105 130ResidentMember in <br />Residence <br />75 100 <br />Parks/Swimroing Pools Guest 10 13 <br />Picnic Parks <br />with toilet only Guest 5 10 <br />Movie Theaters Guest 2.5 4 <br /><•'* Drive-In Theaters Space 3 5 <br />Skating Rink/Dance Hall Customer 7 10 <br />Bowling Alley <br />Transportation <br />Airport, Bus or <br />Alley <br />•• <br />133 200 <br />Rail Depot Passenger <br />or <br />2.5 4 <br />Square Foot <br />or <br />3.33 6.5 <br />•Public Restroom 500 630 <br />Auto Service Station Each vehicle served plus 11 13 <br />add for each employee <br />or <br />13 16 <br />Inside Square Foot <br />or <br />0.25 0.6 <br />Public Restrooms 500 630 <br />References: <br />Onsite Wastewater Treatment and Disposal Systems Design Manual, U. S. EPA, <br />October 1980. <br />Forecasting Municipal Water Requirements, Vols. I and II, U. S. Department of <br />Commerce, September 1969. <br />Note on Water Use Data: <br />Figures in the "average" column designate an average daily sewage flow and <br />can be used for sizing the soil treatment unit. Values in the "maximum" <br />column are the average of peak flow rates and should be used for sizing the <br />septic tank or tanks so that adequate detention volume is available on peak <br />flow days. <br />Remember that these figures are only estimates of average flow rates and that <br />each facility Is different. While it is necessary to estimate the flow rate <br />fora new facility, a water meter should always be Installed on any commercial, <br />industrial or recreational facility to measure the actual sewage flow dis­ <br />charged into the sewage treatment system.