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INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET <br />FLOW <br />A. Estimated AO U gpd <br />measured x 1.5 = - gpd <br />SEPTIC TANK VOLUME <br />B. C O gallons <br />SOILS (Site evaluation data) <br />C. Depth to restricting layer = t1.0 ' - Ll ' - t r ' ' feet <br />D. Maximum depth of system C - 3 ft = feet <br />E. Percolation rate t MPI <br />F. Soil Sizing Factor Llr7 sq ft/gpd (See table 3) L o? -1 + <br />TRENCH BOTTOM AREA <br />H. For trenches with 5 inches of rock below the pipe: <br />A x F = x = _ sq ft of bottom area <br />1. For trenches with 12 inches of rock below the pipe: <br />AxFx0.8=&� xj. t-7x0.8=clv- I sgftofbottom area-ilo.',t�E1` <br />J. For trenches with 18 inches of rock below the pipe• <br />AxFx0.66= x x0.66=_sq ft of bottom area <br />K. For trenches with 24 inches of rock below the pipe: <br />AxFx0.6= x x0.6=_sq ft of bottom area <br />BED BOTTOM AREA <br />L. For seepage beds with 6 or 12 inches of rock below the pipe; <br />1.5xAxF=15x_x_=_sgftofbottom area <br />ROCK VOLUME IN CU F'1; <br />M. Rock depth below distribution pipe plus 0.5 foot times bottom area: <br />M =Rock depth (ft) +;6 inches x Area (H, 1, J, L or K) <br />(„LO ft+O5ft) x uf'I =11y�L Cu ft <br />ROCK VOLUME IN CU YDS <br />N. Volume in cu ft divided by 27 <br />M+27=cuyds11yS+27=L4% cuyds <br />ROCK WEIGHT <br />O. Cubic yards times 1.4 = tons <br />N x 1.4 = tonsImo'. x 1.4 = dons <br />DISTRIBUTION tzs � <br />(Check one based on slope) <br />Bed (less than 6% slope) <br />Trenches <br />l Drop boxes (any slope) <br />— Distribution box (level to slightly sloping) <br />TRENCH LENGTH <br />P. Select trench width = ' ft <br />Q. Divide bottom area by trench width: (H. I, J, or K) + P = <br />lineal feet <br />,r + linea, t <br />LAWN AREA <br />R. Select trench spacing, center to center= `, feet <br />S. Multiply trench spacing by lineal feet R x Q = sq ft of lawn area <br />x r sq ft <br />T_tyOUT (Use other side) <br />1. Select an appropriate scale; one square = feet. <br />2. Show pertinent property boundaries, right-of-way, easements. <br />3. Show location of house, garage, driveway, and all other <br />improvements, existing or proposed <br />4. Show location and layout of sewage treatment system. <br />5. Show location of water supply well. <br />6. Dimension all set backs and separation distances. <br />Estimated Sewage Flows in Gallons per day <br />(bpd) <br />Number <br />Minimum Liquid <br />Liquid capacity with <br />Bedrooms <br />Capacity <br />of <br />Type I <br />Type B <br />Type BI <br />Tyypc <br />Bedrooms <br />ism <br />4 or 6 <br />1510 <br />Iv <br />2 <br />300 <br />225 <br />180 <br />0.1 %o5 <br />3 <br />450 <br />300 <br />218 <br />Piro sand • <br />4 <br />600 <br />375 <br />256 <br />ori <br />or the <br />5 <br />6 <br />750 <br />900 <br />450 <br />525 <br />294 <br />332 <br />;n <br />TMI L <br />7 <br />1050 <br />600 <br />370 <br />111 <br />8 <br />1200 <br />675 <br />408 <br />1 columm <br />Scptic Tank Capacities, In gallons <br />Number of <br />Minimum Liquid <br />Liquid capacity with <br />Bedrooms <br />Capacity <br />garbage disposal <br />2 or less <br />750 <br />1125 <br />3 or 4 <br />1000 <br />ism <br />4 or 6 <br />1510 <br />2250 <br />7, 8 or 9 <br />2000 <br />3000 <br />over 9 <br />0.1 %o5 <br />...... <br />Soil Characteristics and Required Areas <br />for Sewage Trealment <br />Parolation Rate in <br />Square <br />Gallons <br />Ntinutut Inch <br />Soil Texture <br />reaper <br />per day pe+ <br />(MJ'I) <br />gallon per <br />aquam taut <br />da <br />Fater than 0.1 • <br />coarse Sud <br />---- <br />-- <br />0.1 %o5 <br />Sand <br />0.13 <br />1.20 <br />0.1 to 5 <br />Piro sand • <br />1.67 <br />060 <br />6 to 15 <br />Sandy Loam0.79 <br />J6 to 30 <br />Loam <br />1.67 <br />060 <br />31 to 45 <br />-Silt l.ea <br />00 <br />0.50 <br />46 to 60 <br />Clay Laatn <br />220 <br />0.45 <br />Slone than 60 ••• <br />Clay <br />---- <br />---- <br />T <br />2 inch Cover <br />t <br />4 inch Pipe <br />6-24 inch <br />Rock Below the 1' <br />I <br />