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Determine Surface Arca <br />Rectangle - Area v L x W <br />x W _ <br />Circle - Arca = x x (RadiusY <br />3.14 x x = <br />square feet <br />square feet <br />Other - Get Surface Arra from Manufacturer <br />square feet <br />T <br />wuluh <br />l <br />l cngth <br />Radius <br />R - 3.14 <br />2. Calculate Gallons Per Inch <br />There are 7.5 gallons pct cubic foot of volume, therefore you must multiply the area <br />times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br />Arra x 7.5 gpft I + 12 inchs per fool <br />x 7.5 + 12 = 7-1 gallonslinch <br />3. Calculate Gallons to Cover Pump (with 2 inches of water covering pump) <br />(Height (in) + 2 inches) x gallons/inch (82) <br />( 10 ++ _) x.(_ _ Z6-4 gallons <br />4. Calculate Total Pumpout Volume <br />a. To maximize pump life select sum size for 4 io 5 pump operations per day. <br />a o gpd + 4 gallon; pc•r dose <br />b. Calculate drainback <br />1. Determine total pipe length, 4-C' feet. <br />2. Determine liquid volume of pipe, (_¢gallons per 1(N) fctit. <br />3. Multi ly length by volume: Drainback quantity <br />f� feet x ZZA gallons/ 1170 ft. _ _7 gallons. <br />Esiimalod Scwsge Flows in Gallons per day <br />(gw) <br />Numhcr <br />1.25 <br />19 <br />7.77 <br />1.5 <br />10.58 <br />of <br />Type 1 <br />Typc II <br />Type III <br />T•rsc <br />�v <br />Bedrooms <br />4 <br />66.1 <br />2 <br />300 <br />223 <br />180 <br />3 <br />450 <br />300 <br />218 <br />eas <br />4 <br />600 <br />375 <br />256 <br />'r u" <br />5 <br />750 <br />430 <br />294 <br />6 <br />900 <br />525 <br />332 <br />�►r< <br />7 <br />1050 <br />600 <br />370 <br />R <br />1200 <br />675 <br />408 <br />wl�r+w <br />c. Total pump out volume equals dose volume + drahAvick <br />1-15'&eallons per dose + _Z_ gallons = /S7 gallons <br />5. Calculate Volume for Alarm (tvpicaliy 2 to 3 inches) <br />Doth (in) x gallons/inch (82) _ <br />Z / x- = 42. gallons <br />6. Calculate Reserve Capacity (75% the daily flow) <br />Daily flow (sce page D-7) x.7; _ <br />&C;IX .75 = 4-9-0 gallons <br />7. Calculate total gallons <br />gallons over rump + gallons pumpout +g,.il ns alarm + gallons reserve caperty <br />03 + u4 c+a 5 +a 6 <br />i S. + _Zq � + + _ _ 717--.;p gallons <br />R. Total Depth (Total gallon divided by gallon per inch) <br />Total allon (07) + gallon/inch 02) <br />2 = r inches <br />r 4!1. (.,,,.,. � <br />c..n�... , 1001 1 <br />1.25 <br />19 <br />7.77 <br />1.5 <br />10.58 <br />2 <br />17.43 <br />2.5 <br />24.87 <br />3 <br />38.4 <br />4 <br />66.1 <br />Rcurve Capacit) <br />A him <br />Pump On <br />T') I Pumpoul %°alumc <br />Pump OR <br />Pump Hcighi <br />9. Float Separation Distance (equals Iota] pumpout vol111110 t i <br />Total pumpout volume (1140 + gallons/inch (ND <br />_ZZ--,i� inches <br />