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<br />FLOW
<br />A Est1m,1ted gpd
<br />nwasured ____ x _____ gpd
<br />SEPTIC TANK VOLUME
<br />Lor 5
<br />irlh'~
<br />B. '2~ 13'90 _ galluns
<br />SOILS (Site evaluation data)
<br />C Depth to restricting layer= ___ !i,.;5._ . ___ feel
<br />D Maximum deP.th of system C -3 ft= __ J,_L _ feel
<br />L Texture S:~lo~Percolalion rah' 0-'2.6 __ MP!
<br />F SSF I.bi sqft/gpd
<br />TRENCH BOTTOM AREA
<br />H. For trenches with 6 inches of rock below the pipe:
<br />Ax F = __ x __ = __ sq ft of bottom area
<br />L For trenches with 12 inches of rock below the pipe:
<br />Ax F x 0.8 = __ x __ x 0.8 = __ sq ft of bottom area
<br />J. For trenches with 18 inches of rock below the pipe:
<br />A x F x 0.66 = __ x __ x 0.66 = __ sq ft of bottom area
<br />K. For trenches with 24 inches of rock below the pipe:
<br />Ax F x 0.6 = __ x __ x 0.6 = __ sq ft of bottom area
<br />BED BOTTOM AREA
<br />L For G.ravity beds with 6 or 12 inches of rock below the pipe;
<br />1.5 x A x F = 1.5 x x sq ft of bottom area
<br />For Pressure beds with 6 or 12 inches of rock belov,, the pipe;
<br />A x F = __ x __ = __ sq ft of bottom area
<br />ROCK VOLUME IN CU Ff
<br />M. 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 />( __ + 0.5 ft) X __ = __ CU ft
<br />ROCK VOLUME IN CU YDS
<br />N. Volume in cuft divided by 27
<br />0.
<br />M + 27 = cu yds _ + 27 = __ cu yds
<br />ROCK WEIGHT
<br />Cubic yards times 1.4 = tons
<br />Nx 1.4 = tons X 1.4 =
<br />DISTRIBUTION
<br />tons
<br />(Check one based on slope) __ Bed ( < 6% slope)
<br />Trenches L Drop boxes (any slope) __ Distribution box(< 3%)
<br />SYSTEM LENGTH
<br />P Select width = ft
<br />Q. Divide bottom area by width: (H, I, J, or K) + P = lineal feet
<br />+ = lirteal feet
<br />Gravelless Pipe
<br />( 10" :A x F + 3)= Lineal Feet ( 8" :A x F + 2)= Lineal Feet
<br />Chamber (A x F + width of chamber)
<br />,.:e__x /_(;7 + 2_ = YJAlineal feet
<br />LAWN AREA
<br />R Select trench spacing, center to center= 2_ feet
<br />S. Multiply trench spacing by lineal feet R x Q = sq ft of lawn area
<br />'/~x2-=~sqft
<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 />improvenwnts, existing or proposed
<br />.:J 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 />_Es11matt·d ~~~·-•~~-~· F_l~,~-•-~1-~iall~~~~~t.·r l}ay <gpd) -
<br />Nurnhcr
<br />of Type I Type II Type 111 Type IV Bc,lrooms
<br />2 JOO ::!2~ 180 hll'-1 J 450 ~(Xl 218 .. ,
<br />4 600 175 2.~6 U,c
<br />5 750 450 294 \·;1!uc:,,.
<br />6 900 525 ~-l,~ '" 1hc
<br />7 1050 600 .170 uthc,
<br />8 1200 675 408 tt1lu11u1,
<br />Number Minimum Mtnimun1
<br />Septic Tan~ Cap:u.:uy with of Liqut<I Garha)'..t.'
<br />Bedrooms Capacily Disposal
<br />(gallons) tgallonsl
<br />2 or less 750 1.125
<br />3 or4 1.000 1.500
<br />5 or 6 1.500 2.250
<br />7 or 8 2,000 3.000
<br />over 9 See fig. C-6 (X 1.5)
<br />5(1il Characteristics&. Rcquin,_,J A~.t:-hu St!\\·.t~t· T n·.Hnwnt
<br />rcrcolation Rak '=ju.ah· l,Yl (:..,11.. .. ,.
<br />Soil Texture , ... , ~.all.~, , ... ,<1 .. ,
<br />Minult.-s ~r inch ,..-,.i.., ,....-.,";:t·" {mpi)
<br />Faster than 0.1 • :Coarse Sand ----------
<br />0.1 to5 Sand 0.8:l 1.20
<br />0.1 to5 Fine Sand•• 1.67 0.60
<br />6 to 15 r=,andy Loam 1.27 0.79
<br />16 to 30 Loam 1.67 0.60
<br />:n 1045 Silt Loam 2.00 050
<br />46 lo 60 ClavLoam 2.20 0.-lS
<br />Slower than 60° .. Clay -----(0.24)
<br />• Soil ttx1 coan.e (or ~wage treatment.
<br />U::.e ::-ystcms for rapidly pt!mliablt! !toil:,.
<br />'"" Soil having 50'X, or more of fine or ,:cry line s.md.
<br />-• Soll with too high a percentage of day for -
<br />installation of an ingmund standard system.
<br />T
<br />2 ir,:hCowr t f "'''
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