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INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET <br /> <br /> FLOW <br />A. Estimated V,,.~ gpd <br />measured x 1.5= __ gpd <br /> SEPTIC TANK VOLUME <br />6. ,cO ga.ons <br /> <br /> SOILS (Site evaluation data) <br />C. Depth to restricting layer = ~ feet <br /> D. Maxunurn dcj~th oJTsystem C- 3 tt = ~'Q/~ feet <br />E. Texture ~3c,de ~ Percolation rate /, ~J'"~ MPI <br />F. SSF _/,-~9 sq ft/gpd <br />G. Slope t~ % <br /> <br />Lo <br /> <br /> TRENCH BOTTOM AREA <br />For trenches with 6 roches of rock below the pipe: <br /> AxF=__x__ = sq f! of bottom area <br />For trenches with 12 inches of rock below the pipe: <br /> A x F x 0.8 = ~/~-0 x J,-~? x 0.8 = b~Ogq ft of bottom area <br />For trenches with 18 inches of rock below the pipe: <br /> A x F x O.e,t, = __ x __ x 0.66 = __ sq ft of bottom area <br />For trenches with 24 inches of rock below the pipe: <br /> A x F x 0.6 = __ x __ x 0.(~= __ sq ft of bottom area <br /> BED BOTTOM AREA <br />For seepage beds with 6 or 12 inches of rock below the pipe; <br /> 1.5 x A x F = 1.5 x x = sq it of bottom area <br /> <br /> ROCK VOLUME IN CU FT <br />Rock depth below distribution pipe plus 0.5 foot times bottom area: <br /> M :Rock depth + 6 inches x ~Area (H,I,J,L,K) <br /> ( / +O.5ft) x~{,~=¥d-~ cuft <br /> ROCK VOLUME IN CU YDS <br />Volume in cuft divided by 27 <br /> M + 27 = cu yds ?~J~ * 27 =~]-~rcu yds <br /> ROCK WEIGHT <br />Cubic yards times 1,4 = tons <br /> N x 1.4 = tons 3~. y x 1.4 = ~/~/tons <br /> <br /> SYSTEM LENGTH <br />P. Select trench width = ~ ft <br />Q. Divide bottom area by trench width: (H, I, J, or K) + P = <br /> lineal feet <br /> <br />QI. Gravelle~ [)e~n <br /> A x F * ( 3 for Iff' pipe, 2 for 8" pipe, width of ~e Chamber ) <br /> ' , ~x +~= f~t <br /> <br /># <br /> <br />P <br /> <br /> LAWN AREA <br />Select trcrwh ,pacing, center to ccnh'r: b feet <br />Multiply tt-cn~ h spacing by [mt,,d feet R x Q = sq ft of lawn area <br /> ~¢V × Z, =/,&0~sq ft <br /> <br /> LAYOUT (Use other side) <br />1. Select an appropriate scah'; one square = ~ feet. <br />2. Show pertinent property boundaries, right-of-way, easements. <br />3. Show locat.m 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 /> <br />Number of <br /> <br />~ Or <br /> 3 or4 <br /> <br /> 5 or6 <br />7.8or9 <br /> <br /> Eslimaled Sewage Flows in Gallons per da), <br /> <br /> 2 I .~-I 225 I 180 I - <br /> ~ I4-~) I ~o ! 2~s I ~ <br /> <br /> 6 k~l) 5.S 33. T' <br /> <br /> Septic Tank Capacities (In gallons) <br /> <br /> ~mm~um I.~quidI Lsqmd cap~cily ~idl <br /> garbage <br /> <br /> 750 ' ~ 1125 <br /> woo ] 1500 <br /> i soo / 2250 <br /> 2(XX) [ 3O00 <br /> <br />Soll C~l~l~clef~lics and Re, uired Areas <br />for ~¢w~ee Trealmen! <br /> <br />Mmules per I~ch <br />(MPI) <br /> <br />Fa.~r Ih,~t O l ' <br /> 0 I Io'~ <br /> OI <br /> 61o 15 <br /> I~ Io ]O <br /> 11 m4~ <br /> <br />~oll [cxluJcICCt per <br /> per day <br /> <br />CoA[~ S~md <br /> <br />Fmc 5~d*' I 67 <br />Sandy Lo~ I 27 <br />[oam ] 67 <br /> <br /> U~ systems for rap,dly permeable soils <br /> ~,oll hiving sO'~ or more t)f <br /> plus very fine ~and <br />*"Soll wi~ I~ h~h a ~fccn~gc of clay <br /> ins~lau~ ol ~ reground s~d sys~m <br /> <br />6inches= 0% Reduction* <br />12 inches= 20% Reduction <br />18 inches= 34% Reduction <br />24 inches= 40% Reduction <br />* sizing for gravelless trench <br /> <br />18-36" Width <br /> <br />Geotextfle Fabric <br /> I 2" Rock Cover <br /> 4" Dist. Piim <br /> <br /> /,2 '? <br /> Rock <br />3/4-2 1/2" <br /> <br /> <br />