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` ' INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET FLOW Estimated Sewage Flows in Gallons per day A. Estimated r),.<D gpd (gpd) measured x 1.5= gpd Number SEPTIC TANK VOLUME of Type I Type II Type III Type B. /- 1a SD - ) - 10 O 0 gallons Bedrooms IV 2 300 225 180 SOILS(Site evaluation data) 3 450 300 218 6a% i 4 600 375 256 . afi to C. Depth to restricting layer= 5 "1-0 -2 12- feet 5 750 450 294 in D. Maximum depth of system C-3 ft= Co-.24' feet 6 900 525 332 Type 1, E. Percolation rate `--)•O MPI 7 1050 600 370 11/7` F. Soil Sizing Factor sq ft/gpd (See table 3) 8 1200 675 408 columns TRENCH BOTTOM AREA H. For trenches with 6 inches of rock below the pipe: Septic Tank Capacities,in gallons A x F= x = ft of bottom area Number of Minimum Liquid Liquid capacity with sq Bedrooms Capacity garbage disposal I. For trenches with 12 inches of rock below the pipe: AxFx0.8= x x0.8= sq ft of bottom area 23rless 105000 1500 or 4J. *For trenches withi&nches of rock below the pipe: gor 6 1500 . _ �r A x F x 0.66= 0 x D.3 x 0.66= A '/0 O sq ft of bottom area+107.8 or 9 2000 8'S over 9 K. For trenches with 24 inches of rock below the pipe: _/c..)<6/9 AxFx0.6= x x 0.6= sq ft of bottom area BED BOTTOM AREA L. For seepage beds with 6 or 12 inches of rock below the pipe; 1.5 x A x F= 1.5 x x = sq ft of bottom area Soil Characteristics and Required Areas for Sewage Treatment ROCK VOLUME IN CU FT Percolation Rate in Square Gallons M. Rock depth below distribution pipe plus 0.5 foot times bottom area: Minutes per Inch Soil Texture feet per per day per M=Rock depth(ft)+6 inches x Area (H,I,J,L or K) (MPI) gallon per square foot day ( /.5 ft+0.5 ft)x/Os;1=al 1 Kicu ft Faster than 0.1 • Coarse Sand ROCK VOLUME IN CU YDS o.t to Sand 0.83 1.20 0.1 to 5 Fine sand•• 1.67 0.60 N. Volume in cu ft divided by 27 6 to 15 Sandy Loam 1.27 0.79 M+27=cu dsjI 5e+27= 'D cu ds 16 to 30 Loam 1.67 0.60 Y Y �to_45_-_^Silt Loam 0.50 ROCK WEIGHT 46 to 60 Clay Loam -2-.20 0.45 Slower than 60••• Clay ---- O. Cubic yards times 1.4 =tons Nx1.4= tons 4S0 x1.4= )►Z tons DISTRIBUTION (Check one based on slope) ..".?:.;S::::::::::::::'::::°:-•�•'• '-• '•• '••.'.•'r"•r"••r'ry • Bed (less than 6% slope) r;r•r•:•r•r•r•r•rrr'r•r:r• T 2 inch Cover Trenches ''f•rr•5'r'r•f•r''4r5 '.r• Drop boxes(any slope) �•••••• � i • •ti•r •ti••. r •ti• •r• •:.?:::;::::: 4 inch Pipe Distribution box(level to slightly sloping) 'fir f'•rti •:/r/}::: ti.ti.ti.ti. ti.•. TRENCH LENGTH r;rtir�f.r; •r•r.: �•r; f.r r.r•r/r.r.r.r:�.fp . !/ P. Select trench width= 3 ftr•r•r.;•r▪•r•r•r•r•r:r:r:f:r; Q. Divide bottom area by trench width: (H, I,J,or K)_P = f•r'r'r•r•r•r•r-r•:r:f:::VV :•r.r.r•r•r•r•r:' r;r;f�r:l• lineal feet •••ti•••••▪•••••%••• ti•'• 6-24 inch . '••ti'�'ti'ti'ti''•':':'•''•''•"•''•Rock Below the Pi /oxh+ 3 lineal feet .:••'•r•:•:.r•:.:•:.:•:••:.:. Pip( =31w r•r•:•:•r•r•r•r•:•:•r•::' LAWN AREA {•./' .,.ti..,,ti..,..,.. . . r.r.r.:.r.r.r.r.r.r.r:: ;•:;. ti•ti••.••.•ti•ti•ti•ti••.••.••.•ti••.••. R. Select trench spacing,center to center= 4� feet f'-?'f'r'f'f-••••,.••••.•••••.••.•• S. Multipl; ►rench spacing by lineal feet R x Q=sq ft of lawn area 3(;3 x _D5o4 sq ft LAYOUT(Use other side) 1.Select an appropriate scale;one square= feet. 2.Show pertinent property boundaries,right-of-way,easements. 3.Show location of house,garage,driveway,and all other improvements, existing or proposed 4.Show location and layout of sewage treatment system. 5.Show location of water supply well. 6. Dimension all set backs and separation distances.