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I~ U I\ l lJ lJ AL ~ L WA'--' L 11{ LA I f\11 1'-1 I ~ \::, 1 LM \'\Uh. I,~ I l LL I ' I\ B. C D E F. FLOW Eslimal!'d ")<f) -·-----L~----gpd nwasured X -----gpd ff/ /YJycJ'- OIV) SEPTIC TANK VOLUME ·--"';l-'-"e.~t~&Jo-=~----gallons SOILS (Site evalu~tjon data) Depth to restricting layer = ____ '1~----feet Maxim~ depth of system C -3 ft feel Texture~"I ~Percolation rate \'21'::20 MP! SSF la:2_ sq fl/ gpd TRENCH BOTTOM AREA H. For trenches with 6 inches of rock below the pipe: A x F = __ x __ = __ sq ft of bottom area I. For trenches with 12 inches of rock below the pipe: A x F x 0.8 = __ x __ x 0.8 = __ sq ft of bottom area For trenches with 18 inches of rock below the pipe: A x F x 0.66 = __ x __ x 0.66 = __ sq ft of bottom area K. For trenches with 24 inches of rock below the pipe: Ax F x 0.6 = x x 0.6 = sq ft of bottom area BED BOTTOM AREA L. For Gravity beds with 6 or 12 inches of rock below the pipe; 1:s x Ax F = 1.5 x --x --= --sq ft of bottom area For Pressure beds with 6 or 12 inches of rock below the pipe; Ax F = __ x __ = __ sq ft of bottom area ROCK VOLUME IN CU Ff M. N. 0. Rock depth below distribution pipe plus 0.5 foot times bottom area: M =Rock depth+ 6 inches x Area (H,I,J,L,K) ,( __ . t 05_ ft) x __ = __ cu ft ROCK VOLUME IN CU YDS Volume in cu ft divided by 27 M + 27 = cu yds _ + 27 = __ cu yds ROCK WEIGHT Cubic yards times 1.4 = tons Nx 1.4 = tons X 1.4= · DISTRIBUTION tons (Checl< one p.3:s_e_~ on slope) __ Bed ( < 6% slope) Trenches_._., Drop boxes (any slope) __ Distribution box(< 3%) ··. :·. . SYSTEM LENGTH P. Seled width ~ ft Q. Divide bottom area by width: (H, I, J, or K) + P = lineal feet ~ = lineal feet Gravelless Pipe ( 10" :A x F + 3)= Lineal Feet ( 8" :Ax F + 2)= Lineal Feet Chamber (A x F + width of chamber) 7;t2_x bTI_ + .3._=~ineal feet LAWN AREA R. Select trench spacing, center to center= J_ feet S Multiply trench spacing by lineal feet Rx Q == sg ft of lawn art'i1 -:+--~ == 2/l-Usu, ft LAYOUT (Use other side) Select an appropriate scale; one sguar<' == ---,.-~ feet 2. Shov,1 pertinent property boundaries, right-of-way, cascmc·nh 1. Show location of house, garage, driveway, and all olh<'r improvements, existing or proposed ·L Show location and layout of sewage treatment system. 5. Show location of water supply well. 6. Dimension all set backs and separation distances. Lo-f 5 Esiima1cd Sr~!!' Fl<~,·~~ <i~llnn~I"'' llay <rpdl ----------.-----·--------- Numtwr of Typr I '!)•pc II Typ<' 111 Typ<' I\' llcdtooms 2 300 225 180 t-.()•,t 3 450 300 218 "' 4 600 375 256 th, 5 750 4.~0 294 \·;due_, "' 6 900 525 3:12 lhl· 7 !050 600 .no Ulh<'1 8 1200 675 40~ {nlmnn, Number Minimum Minimum Septic Tank Capacity with of Liquid Ga1baic- Bedrooms Capacity Disr><.1sal (gallons\ (gallons) 2 or less 750 1.125 3 or4 1,000 1.500 5 or6 1,500 2,250 7 or 8 2,000 3.000 over9 Sec fig. C-6 (X 1.5) Soil Ch;i.ractt!ristics & R~uin.J An-a~ hu St•wAJ:,t' ln•almt'nt Pt>rcolation Rate !-<:i•LU.-ln-1 ~lk1n, Soil Texture f"<"lt->11,,.... ,..,,d_.,. Minul~ per inch !"1d.>\ f'<n"lu"" (mpi) ·~· Faster than 0.1• Coarse Sand ---------- 0.1 to5 Sand 0.83 1.20 0.1 to5 Fine Sand .. 1.67 0.60 6 to 15 ~dyLoam L27 0.79 16 to 30 . Loam 1.67 0.60 31 to 45 , .. Silt Loam· 2.00 0.50 . , .46 to 60 . ;. Clatl..oam 2.,20 0.45 Slower than 60 .. 1• . lay --(0.24) ... r,,·,r. . , . • Soil too coarse for sewage treatment. · · : Use systems for rapidly penniablt! soils. -Soil having SO'Y. or more of (int! or ver)' fine sand . . ''.°'',Soil wllh too hlgha percentage of day for · installation of an lngmund standard system. T 2 irr.:1.Cover t f"''