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DOSING CHAMBER SIZING <br /> j <br /> 1. Determine area e r <br /> A. Rectangle area= L x W l <br /> x = square feet <br /> B. Circle area=n(3.14) x radius in feet x radius in feet Length—1 <br /> 3.14 x ft x ft = sgft <br /> C. Get area from manufacturer sqft Radius <br /> 2. Calculate gallons per inch <br /> There are 7.5 gallons per cubic foot of volume, therefore multiply the area (1A, B or C) <br /> times the conversion factor and divide by 12 inches per foot to calculate gallon per inch. <br /> Area x 7.5+ 12= sgft x 7.5 + 12 in/ft = gallon per inch <br /> 3. Calculate total tank volume Legal Tank: <br /> A. Depth from bottom of inlet pipe to tank bottom in 500 gallons or <br /> B. Total tank volume = depth from bottom of inlet pipe to tank bottom (3A)x gal/in (2) 100% the Daily flow <br /> in x gal/in= Z';- gal ,�AM 4� ,o e- or <br /> Alternating Pumps <br /> 4. Calculate gallons to cover pump (with 2-3 inches of water covering pump) <br /> (Pump and block height(inch) +2 inch) x gallon/inch A•1; Estimated Sewage Flows in Gallons per Day <br /> ( /Q_in +2 in) x .Z C_gal/in =3040 gallon numbero <br /> bedrooms Class I Class II Class III Class IV <br /> 5. Calculate total pumpout volume 2 300 225 180 6a <br /> A. Select pump size for 4-5 does per day. Gallon per dose=gpd (see figure A-1) 3 450 300 218 -.f the <br /> / doses per day=7$"O gpd = 1_doses/day= gallons 4 600 375 256 values <br /> B. Calculate drainback 5 750 450 294 nthe <br /> 1. Determine total pipe length,-Z5'0 feet 6 900 525 332 Cios::, <br /> 2. Determine liquid volume of pipe,/ gal per ft(see figure E-20) 7 1050 600 370 II,oral <br /> 3. Drainback quantity=XOO ft(5131) x gal per ft(5B2)_ gal 8 1200 675 408 columns <br /> C. Total pump out volume -4ose volume ( ) +drainback(5B3) <br /> Z.S-0 gal+ .3 Y gal =Notal gallon E-20: Volume of Liquid in Pipe <br /> 6. Float separation distance (using total pumpout volume) Pipe.Diameter Gallons per foot <br /> Total puropout volume(5C)+gal/inch (2) 1 <br /> /dZ—gal- .Zs gal/in= 7 1 0-045 <br /> inch 125 0.078 <br /> 7. Calculate volume for alarm (typically 2 to 3 inches) 1.5 0.11 <br /> Alarm depth (inch) xgallon/inch(2) __ in x 44L-S_ <br /> _ -b gal 2 0.17 <br /> 2.5 0.25 <br /> 8. Calculate total gallon= al ons over pump (4) +gallons pump ut(5C) +gallons alarm (7) 3 0.38 <br /> gal +_YYal+_ O Qat= .S3 gallons 4 0.66 <br /> 9. Total Tank Depth= total gallon (8)+gallon/inc (2) ::•iti Y:. <br /> gal- ZS gal/in= ZY '/'�in <.. <br /> inlet ;.;,. .;.,, ,r., .w:•.ra�: Y;., <br /> pipe <br /> Recommended: , eserve capacity .t <br /> alarm on <br /> Calculate reserve capacity (75% the daily flow) _ _ _ _ _ _ _ control <br /> Daily flow x .75 <br /> xf <br /> = d x .75 = QZ gallons pumpout volume f; <br /> ;-z <br /> ;r --- ------------- --- - ? pump on <br /> .,` pump off control <br /> control 1 <br /> r�h�f,:a.l��r�•A��f wi•iti'Yili{'Y'.'iti'•1:�: <br /> I hereby certify�that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> �Cl�v (signature) 3Q� (license#) -•ZQ-o (date) <br />