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INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEE-r <br />D-25 <br />j <br />FLOW <br />A. Estimated c'y gpd <br />measured x 1.5= gpd <br />SEPTIC TANK VOLUME <br />B. - / D D rj gallons <br />SOILS (Site evaluation data) <br />C. Depth to restricting layer = y - �-•' feet <br />D. Maximum depth of system C - 3 ft feet <br />E. Percolation rate '•1P1 <br />F. SSF 1. +=? sq f;/gpd 1_:1 t3 t•) <br />TRENCH BOTTOM AREA •1•• a t �a�\ �l + •� <br />H. For trenches %%ith 6 inches of rock below the pipe: <br />A x F= _;c; x 1.y% =t7oa sq ft of bottom area <br />1. For trenches t%it,'1 12 inches of rock below the pipe: <br />AxFx0.8=_x_x0.8=lsgftofbottom area <br />J. For trenches %ith 18 inches of rock below the pipe: <br />AxFx0.66= x x0.66=_softofbottom area <br />K- For trenches %ith 24 inches of rock below the pipe: <br />AxFx0.6= x_x0.6=_sgftofbottom area <br />BED BOTTO'\i AREA <br />L For seepage beds with 6 or 12 inches of rock below the pipe; <br />1.5xAxF=lax_x_=_sgftofbottom area <br />ROCK VOLUME IN CU FT <br />M. Rock depth below distribution pipe plus OS foot times bottom area: <br />M =Rock depth + 6 inches x Area (H,i,J,L,K) <br />+ 05 ft) x — cu ft <br />ROCK VOLUME IN CU YDS <br />N. Volume in cu ft divided by 27 <br />M+27=cuyds=+27= —cuyds <br />ROCK WEIGHT <br />O. Cubic yards times 1.4 = tons <br />N x 1.4 = tons — x 1.4 = — tons <br />DISTRIBUTION <br />(Check one based on slope) <br />Bed (less than 6% slope) <br />Trenches <br />Drop boxes (any slope) <br />Distribution box (level to slightly sloping) <br />TREIT'CH LENGTH <br />P. Select trench width = 72 -O ft I�. -�..:.V a "'K �, c <br />Q. Divide bottom area by trench width: (H, i, J, or K) + P = <br />lineal feet <br />/cc a + : c = ?—y lineal feet ? 5 0 �+ • ti r <br />LAWNAREA <br />R. Select trench spacing, center to center = S feet <br />S. Multiply trench spacing by lineal feet R x Q = sq ft of lawn area <br />340 x S=1)e)Gsgft <br />LAYOUT (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 />Estmau4 Sc•..(, r10- m G.Uoc. pa D.y (pw) <br />Numt- I <br />of Tqc I <br />Tlpt ❑ <br />T�Tc rI <br />I T.z IV <br />B e& tom+i —� <br />2 ;0o <br />:2-51 <br />11`0 <br />ra <br />3 c50 <br />300 <br />211 <br />i <br />c(d <br />375 <br />_.% <br />5 750 <br />; 5o <br />5 <br />7 IC 0 <br />I 600 <br />310 <br />6 I_0o <br />675 <br />cty <br />,a <br />NUmber <br />�1`�= <br />v-=— <br />of <br />I {' d <br />G a--v <br />Bc,.jooms <br />G ace <br />D; <br />2 or las <br />750 <br />1.125 <br />3 or : <br />1.000 <br />1.500 <br />5 or 6 <br />1.500 <br />2.250 <br />7 or 8 <br />2.000 <br />3.000 <br />of Q 9 <br />See rig. C-6 <br />(: 1.5) <br />i.mm ram.. 4v <br />*� rl <br />I <br />cr <br />w,.,,. r. w•, <br />ScJ To r1.nr <br />^�,,, .",� <br />r= <br />t r,.l <br />I <br />`•• <br />Fu:C t�sr. 0 1 <br />Coarm Sand <br />— <br />01toi <br />Sand <br />063 <br />12o <br />0 1 10 S <br />Fine S.ad'• <br />167 <br />0.60 <br />6to15 <br />ndyLoam <br />1, <br />0.79 <br />16:033 <br />Loam_ <br />C1.67- <br />0.60 <br />?1 'o Ji <br />S611 Loa..-+ <br />Z063 <br />037 <br />46 :O fJ <br />QajyLoam <br />in <br />o.45 <br />slo- -.h' n 63F— <br />82Y <br />-- <br />(014) <br />' So•1 •.. or•� 1•r •.•.•y �..s..a <br />'• Swl N•va SCE M v .may w nwt <br />6 inches= 0% Reduction` <br />12 inches= 20% Reduction <br />18 inches= 34% Reduction <br />24 inches= 40`7o Reduction <br />• sizing for gravelless trench <br />r•!•!•!•!•!•I•r•!•r•r•I•J• 2 i <br />•!•!•r•r r r• r• <br />l.r.r.r.!• !.: i.i.r.l. <br />;.\•,•\•,•.•. ;:\•may;•\•\ <br />r•r•r•• r•r r r•r• <br />!•r•!•r•r•r•�•: r•r•r•r•r• <br />r• r•!•r•!•r•r•nr•r•!•r•r. Roc <br />!•. r•r•!•r•r•r r•r•r•r•r. <br />r r r•r•!•r•!•♦ r•r•r•r•!• <br />;�;r�fti ;�;�;�;fti •r•f•f•r• <br />1- <br />tch Corer <br />i <br />inch Pipe <br />624 inch <br />L <br />k Below the <br />to.�..t•r Figure D-26 <br />