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INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET <br />FLOW <br />A. <br />Estimated gpd <br />measured - — x 1.5 ■ - •-- go <br />SEPTIC TANK VOLUME <br />B. <br />— ) !fU 1 — 16': (- gallons <br />SOILS (Site evaluation data) <br />C. <br />Depth to restricting layer = ' �' o' • n feet <br />D. <br />Maximum depth of system C - 3 ft = J feet <br />E. <br />Percolation rate 7 MPl <br />F. <br />Soil Sizing Factor • 1 , sq ft/gpd (See table 3) ' <br />TRENCH BOTTOM AREA <br />H. <br />For trenches with 6 inches of rock below the pipe: <br />A x F ■ x ■ _ eq ft of bottom area <br />1. <br />For trenches with 12 inches of rock below the pipe: <br />A x F x 0.8 ■ J x /.?^ x 0.8 = 2" sq ft of bottom are*-+ <br />�. <br />For trenches with 18 inches of rock below the pipe: <br />AxFx0.66= x x0.66■_sgftofbottom area <br />K. <br />For trenches with 24 inches of rock below the pipe: <br />AxFx0.6= x x0.6=_sgftofbottom area <br />DIED BOTTOM AREA <br />L. <br />For seepage beds with 6 or 12 inches of rock below the pipe; <br />1.5xAxF■15x_x_=_sgftofbotiomarea <br />ROCK VOLUME IN CU FT <br />M. <br />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 />(L_ ft + 05 It) x 2 �= IJ + J cu ft <br />ROCK VOLUME IN CU YDS <br />N. <br />Volume in cu ft divided by 27 <br />M + 27 = cu yds_,+ 27 = ' j L cu yds <br />ROCK WEIGHT <br />O. <br />Cubic yards times 1.4 = tons <br />Nx1Aatons IJ-_,,x1.4=tons <br />DISTRIBUTION <br />(Check one based on slope) <br />— <br />Bed (less than 6% slope) <br />Trenches <br />Drop boxes (any slope) <br />Distribution box (level to slightly sloping) <br />TRENCH LENGTH <br />P. <br />Select trench width = ', ft <br />Q. <br />Divide bottom area by trench width: (H, I, ), or K) + P = <br />lineal feet <br />: a L. lineal feet <br />LAWN AREA <br />R. <br />Select trench spacing, center to center = ;' feet <br />S. <br />Multiply trench spacing by lineal feet R x Q = sq ft of lawn area <br />LAYOUT (Use other side) <br />1. Select an appropriate scale; one square = feet. <br />2. Show pertinent property boundaries, right-of-way, casements. <br />3. Show location of house, garage, driveway, and all other <br />improvements, existing or pnlptlscd <br />4. Show location 4nd layout of sewage trealment system. <br />5. Show location of water supply well. <br />b. Dinwnslon all wl backs attJ w1itirdNun dislmtcY-4. <br />E00n w sewap ((w oallmm par day <br />Of wumbir <br />Bedroom <br />Type l <br />Type <br />Type <br />Tir <br />2 <br />300 <br />223 <br />110 <br />3 <br />4 <br />450 <br />6W <br />300 <br />375 <br />218 <br />2% <br />w <br />6 <br />900 <br />323 <br />332w� <br />7 <br />1030 <br />600 <br />370 <br />0 <br />12M <br />675 <br />41X <br />!Mlle Twk Cepalikk It— <br />IN 'R M � <br />2 w Is" 790 3w4 low4 w 6 1700 7. f w 9 2000 orw 9 <br />SaChwaWkNowdilleg"Ai=i <br />mmm <br />respow <br />ft. <br />"M <br />f.aTr..wt�w0.1 <br />r"I. <br />• <br />ca rS <br />saw <br />o.n <br />1.31 <br />f <br />1111M=01 <br />60 1 <br />!M!L_ <br />w <br />i..w <br />em <br />-16 <br />31045 <br />fill trw <br />to <br />k" <br />K w e <br />CMf Ito■ <br />! ! <br />W <br />i <br />