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INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET FLOW Estimated Sewage Flows in Gallons per day A. Estimated (-70gpd (gpd) measured x 1.5 = -- gpd Number SEPTIC TANK VOLUME of Type I Type II Type III Type B. D -1000 gallons Bedrooms IV 2 300 225 180 SOILS (Site evaluation data) 3 450 300 218 60% 114 600 375 256 ofiuu C. Depth to restricting layer= y4 'S0 t-.1461'fret iC 5 750 450 294 in D. Maximum depth of system C-3 ft = 54.,l IC I .'1 feet 6 900 525 332 Type I. E. Percolation rate 3 . (/ MPI 7 1050 600 370 II or F. Soil Sizing Factor ),L sq ft/gpd (See table 3) 1.--.0)-)s,1.1. , _I \ 8 1200 675 408 co i h s TRENCH BOTTOM AREAL ;`,'''. ':-'-• �+\^r.• : ,`, Septic Tank Capacities,in gallons H. For trenches with 6 inches of rock below the pipe: A x F= c-ora x ).c,') =;707.) sqft of bottom area Number of Ntinimum Liquid Liquid capacity with Bedrooms Capacity garbage disposal I. For trenches with 12 inches of rock below the pipe: • A x F x 0.8 = x x 0.8 = sqft of bottom arca 2 or less 750 1125 3 or 4 1(XX) 15(x) J. For trenches with 18 inches of rock below the pipe: 4 or 6 15(X) 2250 A x F x 0.66= x x 0.66 = sq ft of bottom area 7.8 or 9 2(Xx) 30kx) over 9 K. For trenches with 24 inches of rock below the pipe: A x F x 0.6= 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 Scwa2e Treatment ROCK VOLUME IN CU FT Percolation Rate in Square Gallons Ni. Rock depth below distribution pipe plus 0.5 foot times bottom area: 5tinut,.per Inch Soil Texture feet per per day per M =Rock depth(ft) + 6 inches x Area (H,1,J, L or K) (MPI) gallday on per square foot ( ____ft+0.5 ft)x cu ft Faster than 0.1 • Coarse Sand ROCK VOLUME IN CU YDS 0.1 toy 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 Loam0.79 M+27=cu yds=-+-27= cu yds 16 to 30 Loam 67 0.60 31 to 45 Silt Loam 2. 0.50 ROCK WEIGHT 46to60 Clay Loam 2.20 0.45 Slower than 60••• Clay ---- O. Cubic yards times 1.4 =tons N x 1.4= tons .--x-1.4= tons DISTRIBUTION (Check one based on slope) ~"'~'~"''~""~'~ ''~'~'� r•r•r•r•:•r•r•r•r•r•:•r;r•r• Bed(less than 6%slope) ti•::::** ti',1•.; ti••••••.• ti•ti ✓:;:��rti.ti�tir.rti�::;..;: :•r� 2inchCovcr r•r•r•r•r•r•r•r•r; „▪;f;r- Trenches '�▪ ''•''Z��'• ' L.Drop boxes(any slope) .:.7.1:V....:. :;,r::• r•r•r•r• '\ 'r;r•r�r' inch Pipe Distribution box(level to slightly sloping) %*..fti fti. •�r TRENCH LENGTH :•'r• e:e;e• '••••fs''••:: P. Select trench width= 3 b ft po''tn - .'' :<< - c-'- ►sc\A ;�• •�:::•:::•*•1•'•''••'•• :▪:'S r•r•r•r•r•r•r•r•r•r•r; ti•ti••.•ti•ti••.•'.•ti•••'•' Q. Divide bottom area by trench width: (H,I,J,or K) +P= ,:::::::•:::::•:;::•.•;i:•:.....:::::•::•,:.••r•f.r.r-r.r•r•r•r•r :.f•r ; •. ti•ti••,•ti•. ti•.•. ••. ti••. nch • r•:•:•:•r•r•r•r•;:r•:•r•r• lineal feet 'ti•ti•ti•ti•ti•:•:::; �•'••ti•▪'- Rock Below the Pipe /ooz 3 =33'� • . • + lineal feet .....,.•••,..%•••••••••••••••••••••:•:.•▪•••••••,r•r•r•:•r•r•:•:•r•:.:•r•: LAWN AREAti•ti•.•ti•ti•ti•ti•ti••• ••ti••••, i•r•r•r•r•r•r:r•r•:••:.;r;r;r; R. Select trench spacing,center to center= feet ' ' '•' S. Multiply trench spacing by lineal feet R x Q= sq ft of lawn area ____________ _ _1 �___-____ 33y x S� _ /1,insgftti.-1,,n �a' L.o0 LAYOUT(Use other side) ,-------T � ��_ 1.Select an appropriate scale;one square= feet. 2.Show pertinent property boundaries, right-of-way,easements. 7 3.Show location of house,garage,driveway,and all other ! �0 "%)14. `� b741,Lx- . s5 t° improvements, existing or proposed 4.Show location and layout of sewage treatment system. KwN.)-sic- ` 5.Show location of water suPp .lv well. ,'i _ 6. Dimension <,i' t backs •.i'-. i:>>, 1