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1. Determine Surface Area <br />Rectangle = Area - L x W <br />x = _ <br />Circle - Area - it x (Radius): <br />3.14 x x <br />square feet <br />square feet <br />Other = Get Surface Area from Manufacturer <br />square feet <br />T <br />Width <br />1 <br />Length <br />Radius <br />it = 3.14 <br />2. Calculate Gallons Per Inch <br />There are 7.5 gallons per 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 />Area x 7.5 gpft I + 12 inchs per foot <br />x 7.5 + 12 = �11 C, gallons/inch <br />3. Calculate Gallons to Cover Pump (with 2 inches of water covering pump) <br />(Height (in) + 2 inches) x S�lions/inch (02) <br />(�Q_ + 4- ) x G -0 = ZffQ gallons <br />4. Calculate Total Pumpout Volume <br />a. Ton" pump life select sunjp size for 4 to 5 pump operations per day. <br />gpd +4 gallons per dose <br />b. Calculate drainback Q <br />1. Determine total pipe length, r'O feet. <br />2. Determine liquid volume of pipe, ,43gallons per llx) feet. <br />3. Multiply length bxvolume: Drainback quantity = <br />1Z feet xl /�45gallons/100 ft. _ �4 gallons. <br />Estimate! Sewage Flows in Gallons per day <br />(DW) <br />Numher <br />Type 1 <br />Type 11 <br />Type [if <br />TyV <br />Bedrooms <br />I <br />2 <br />300 <br />225 <br />190 <br />3 <br />300 <br />218 <br />4 <br />600 <br />373 <br />256 <br />S <br />750 <br />430 <br />294 <br />t. <br />7 <br />1050 <br />600 <br />370 <br />tw <br />S <br />1200 <br />673 <br />408 <br />c. Total pump out volume equals dose volume + drainbick <br />7. gallons per dose + / ¢ gallons = R :2 gallons <br />5. Calculate Volume for Alarm (typically 2 to 3 inches) <br />Depth� i�n), x gallons/inch 02) ._ <br />x — _ —40 gallons <br />6. Calculate Reserve Capacity (75% the daily flow) <br />Dai=flo see page D-7 x .75 = <br />z .75 = ZZ - gallons <br />7. Calculate total gallons <br />gallons over pump + gallons pumpout +g ilons alarm + gallons reserve capcity <br />03 +� N 51 „+g <br />Z O + + O + Z _ ailons <br />8. Total Depth (Total gallon divided by gallon per inch) <br />Total Callon (#7) +gall/inch (#2) <br />+ ZO - Z inches <br />Pipe diMna indict <br />G81W= 100 era <br />1.25 <br />7.77 <br />1.5 <br />10.58 <br />2 <br />7-43 <br />2— 4.87 <br />3 <br />38.4 <br />4 <br />66.1 <br />Reserve Capacity <br />Alum <br />Pump On <br />TO al Pumpout Volumc <br />Pump Off <br />Pump Height <br />9. Float Separation Distance (equal total pumpout volume) I tlllli• <br />Total gwmpout volu S c) +gallons/inch (p2) <br />inches <br />