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San Joaquin County Commercial <br /> Septic System Calculator <br /> ADF: Average Daily Flow based on estimated use based on section 6.1,15 (2003,Onsite Wastewater Sewage Standards). <br /> BTC: Base tank capacity,minimum of 1200 gallons(2003,Onsite Wastewater Sewage Standards). <br /> CTC: Calculated tank capacity,the sum of BTC and ADF.When over 1500 gallons per day ADF,calculated tank capacity,may be 75%of the ADF plus 1125 gals(2003,Onsite Wastewater Sewage Standards). <br /> LL:Leach line <br /> See equations below <br /> For Leach Lines Enter <br /> Enter soil factor 0.20 0.20 for sand or sandy loam,0.225 for silt and/or sandy clay loam,0.25 for clay and/or peat. <br /> Enter ADF(gals) 850 <br /> Fitter Bed Multiplier 3 Enter three(3)for sandy soils and four(4)for clayey soils. <br /> Enter one desired dimension of bed width(ft) 40 <br /> Result Calculation <br /> Minimum CTC(gals) 2,050 Since ADF is less than 1500 gpd,ADF+1200=CTC,850+1200=2050 gals <br /> Total calculated length of LL(ft) 410 (BTC+ADF)"SF=LL,(1200+850)`0.2=410 feet total LL requied <br /> Calculated area of filter bed(SF) 1,230 410 ft x 3 ft(filter bed factor)=1230 SF <br /> Resulting configuration: 40 ft x 31 ft filter bed <br /> December 7, 2012 <br /> LGS120007 <br /> Plate 1 Neil O. Anderson Associates, Inc. <br />