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DOSING CHAMBER SIZING <br /> 1. Determine area <br /> A. Rectangle area=L x W Ww1h <br /> __ x = square feet <br /> 13. Circle area=n(3.14) x radius in feet x radius in feet I length <br /> 3.1.4 x ft x ft= sgft <br /> C. Get area from manufacturer sgft <br /> Radius <br /> 2. Calculate gallons per inch <br /> There are 7.5 gallons per cubic foot of volume,therefore multiply the area UA,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 /> J a ,0 I_ <br /> 3. Calculate total tank olumre A-l0 /l Legal Tank: <br /> A. Depth from bottom of inlet pipe to tank bottom ` -im 500 gallons or <br /> B. Total tank volume=de th from bottom of inlet pipe to tank bottom(3A)x gal/in(2) 100% the Daily flow <br /> = - ":/0 in x 3% gal/in= Sc- gal <br /> or <br /> 4. Calculate gallons to cover pump(with 2-3 inches of water covering pump) Alternating Pumps <br /> (Puna nd block height(inch)+2 inch) x gallon/inch A 1,Esld Sewage Fbws Cans per Dar <br /> in+2 in)x�I- I gal/in=3 cYgallon <br /> iwrnber <br /> 5. Calculate total pumpout volume bedrooms awl CWII Gas BI grisly <br /> A. Select pump size for 4-5 does per day. Gallon per dose= d(see figure A-1) 2 300 225 180 � <br /> / doses per day=. 0p d+ gp 1�8 3 450 300 218 olftre <br /> gp doses/day gallons q 600 375 256 vahles <br /> B. Calculate drainback <br /> 1. Determine total pipe length,ILS"feet 450 294 tithe <br /> 6 loff- <br /> 25 332 Class l <br /> 2. Determine liquid volume of pipe,0, per ft(see figure E-20) T_.. 600 370 It of III <br /> 3. Drainback quantity= 115' ft(5B1)xs/ gal per ft(5B2)_ ZO gal 8 1200 675 40B cob' <br /> C. Total pump out volume=dose volume(5A)+drainback(5133) <br /> mal+ _gal= / 70 Total gallon E-20: Volume of Liquid in Pipe <br /> 6. Float separation distance(using total pumpout volume) Pipe Diametei Gallons per foot <br /> Total pumpout volume(5C)=gal/inch(2) <br /> ___.17sZ_ga1= �a1/in= inch 1 0.045 <br /> 5 0.078 <br /> 2 <br /> 7. Calculate volume for alarm(typically 2 to 3 inches) Q 1..2 Qj� <br /> Ain depth(inch)xgallon/inch(2)_ in x-3/3 al/in)_ gal 7=7 9 < , <br /> 2.5 0.25 <br /> 8. Calculate total gallon=gallons over pum (4)+gallons pumpout(50+gallons alarm ) 3 0.38 <br /> -3/-3--gal + f 7c7 ggal+ Sal=- -gallons 4 0.66 <br /> 9. Total Tank Depth=total gallon(8)+gallon/inch(2) � � ,�t.;,.y;, <br /> __17-SO gal= 3/`..3 gal/in=�U _in s <br /> //Inlet �.�/ fir i.'tH/ „�•,.1:•'r yri <br /> t , <br /> Recommended: �), �j pipe �r eserve ap city <br /> Calculate reserve ca aci (� �t alarm on <br /> ty (75% the daily flow) ._._ �%. 9� ;. <br /> Daily flow x .75 = o© x .75 —gallons Jr� �' ► - - - - - - - -M control <br /> pumpout volume <br /> --------- - --- pump on <br /> pump ff� control <br /> of <br /> erc by ,ertify that I have mpleted this work in accordance with applicable ordinances, rules and law . <br /> (signature) l93/ (license#) (date) <br />