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10/06/00 Page 4 <br /> LIFT TANK SIZING <br /> Lift Tank= Eulls 1250 gallon septic tank. <br /> 1. Determine Surface Area <br /> Rectangle area= L x W = <br /> 9.50 x 5.00 = 48 sg ft. <br /> 2. Calculate Gallons Per Inch <br /> Area x 7.5/12= 47.5 x 7.5/12= 29.7 gallons/in. <br /> 3. Calculate Total Volume of Tank Capacity(Inside Bottom of Tank to Inlet Invert) <br /> 43 inches x 29.7 gallons/inch = 1277 gallons <br /> 4. Calculate Total Unusable Tank Capacity <br /> A. Inside bottom of tank to top of pump= 12.0 inches <br /> B. Convert to gallons, <br /> 31 inches x 30 gallons/In. = 356.3 gallons <br /> 5. Calculate Total Usable Tank Capacity <br /> A. Distance between top of pump and inlet invert= 31.0 inches <br /> B.Convert to gallons, <br /> 31 inches x 29.7 gallon/inch = 920 gallons <br /> 6. Calculate Gallons Per Dose <br /> A. Minimum Dose Volume= 20 gallons <br /> B. Liquid volume of supply pipe= 32 gallons <br /> C.Volume of laterals and manifold = 71 gallons <br /> D. Volume of all piping = 104 gallons <br /> Total dose volume= 135 gallons <br /> 7. Dose volume in inches = 4.5 inches <br /> 8. Reserve Capacity= 712.5 gallons <br /> 9. Set Floats <br /> A. Inside bottom of tank to Redundant Off Float= 14.0 inches <br /> B. Inside bottom of tank to Timer On Float= 16.0 inches <br /> D. Inside bottom of tank to High Level Alarm = 40.0 inches <br /> 10. Set Timers <br /> A. Number of Minutes On = 2.41 <br /> B. Number of Minutes Off= 57.59 <br />