Laserfiche WebLink
Design Calculation <br /> 4.1.12 For commercial establishment-the Base Tank Capacity(BTC),a minimum of 1200 gallons is to be <br /> installed, plus the Average Daily Flow(ADF). For ADF above 1500 gallons,the Calculated Tank Capacity <br /> (CTC)may be calculated at 1,125 gallons plus 75%of the average daily flow or V=1,125+0.75 ADF. <br /> Table 6.6—Water Use Computation Table <br /> r)Industrial Building no food cafeteria: 15 gal/per <br /> Peak Occupancy=24 persons <br /> ADF=24 persons x 15 gal/per=360 gallons <br /> BTC= 1,200 gallons <br /> CTC=BTC+ADF= 1,200+360=1,560 gallons <br /> 9.7.2 Method of calculating leach line requirements for all non-standard OWTS design: Multiply the Base <br /> Tank Capacity(BTC) plus the Average Daily Flow (ADF)of sewage by the Soil Factor noted below to <br /> determine the total lineal feet of leach line required. <br /> Table 9.7.2—Sail Factors <br /> SOIL SOIL FACTOR <br /> Clay and/or Peat 0.250 <br /> Silt and/or Sandy Clay Loam 0.225 <br /> Sand and/or Sandy Loam 0.200 <br /> Lineal Feet of Leachline (LFLL)Equivalent= (BTC+ADF)x Soil Factor <br /> Soil Factor=Silt=0.225 based on May 2006 Nitrate Loading Study by Chesney Consulting <br /> LFLL= (1,200 gallons+360 gallons)x 0.225 Silt Soil Factor=351 lineal feet <br /> 9.8.1 The filter bed size will be computed on the following basis: Calculate the length of leach line <br /> requirement as noted in Section 9.6. Multiply this by three in sandy sails and four in clay soils.This gives <br /> the required minimum square footage of the filter bed. <br /> Filter Bed Area= LFLL x Filter Bed Soil Factor <br /> Soil Factor=Silty Sandy=3 based on May 2006 Nitrate Loading Study by Chesney Consulting <br /> Filter Bed Area=351 lineal feet x 3 Sandy Soil Factor= 1,053 square feet <br />