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Univx..ttr ov MmnewrnA <br /> Pump Tank Sizing, Dosing and Float ONSITE <br /> SEWAGE <br /> TREA <br /> Minnesota Pollution and Timer Setting Design Worksheet PROGRAM r , <br /> Control Agency <br /> DETERMINE AREA AND GALLONS PER INCH <br /> 1. A. Rectangle area=Length(L)XrWidth(WW)) Width <br /> —ift X I I ft = ft2 <br /> B. Circle area=3.1452(3.141593 X radius radius X radius)radJJius) J Length <br /> 3. 4 X 2 ft <br /> = ft2 <br /> ®Radiu <br /> C. Get area from manufacturer ft2 <br /> 2. Calculate Gallons Per Inch: <br /> There are 7.48 gallons per cubic foot. Therefore, multiply the area from 1.A, 1.6,or 1.0 by 7.48 to determine the gallons per foot <br /> the tank holds. Then divide that number by 12 to calculate the gallons per inch. <br /> (Area X 7.48 gallons/ft3)/(12 in/ft)= <br /> ft2 X 7.48 12 in/ft = =Gallons Per Inch <br /> TANK CAPACITY <br /> 3. Select the required Minimum Tank Capacity based on the table below [-1000 iGallons <br /> 4. Calculate Total Tank Volume <br /> A. Depth from bottom of inlet pipe to tank bottom: 4O in <br /> B. Total Tank Volume =Depth from bottom of inlet pipe (Line 4.A)X Gallons/Inch (Line 2) <br /> 40 :] in X 1 255.0 Gallons Per Inch = 1000 Gallons <br /> 5. Calculate Volume to Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of <br /> the pump tank 8 2-3 inches of water covering the pump is recommended) <br /> (Pump and block height+2 inches)X Gallons Per Inch (Line 2) <br /> (� $� + 2 inches) 25.0 Gallons Per Inch = 25O Gallons <br /> Design Flow <br /> (Gallons Per Minimum Pump Tank Capacity (Gallons) <br /> Day) <br /> 0-600 500 or Altnernating Dual Pumps <br /> 601-4,999 100% of the Design Flow or Altnernating Dual Pumps <br /> 5,000-9,999 50% of the Design Flow and Altnernating Dual Pumps <br />