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INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET
<br /> D-25
<br /> FLOW Estimated Sewage Flow in Gallons per Day(mad)
<br /> ' A'. Estimated 'ASO gpd Number
<br /> measured - x 1.5= - gpd or 'type t Type U Type DI Type IV
<br /> SEPTIC TANK VOLUME Bedrooms
<br /> B. I I x:50 1 -/000 gallons 3 Oso 225
<br /> 303 180 �A
<br /> 4 600 375256 ,,,c.
<br /> SOILS(Site evaluation data) 5 9 0 525 50 32 nu
<br /> C. Depth to restricting layer= SLC.YF) L'-4S' feet 7 105026006737008 `'�
<br /> D. Maximum depth of system C-3 ft= a , S feet
<br /> E. Percolation rate J '1 . (i MPI
<br /> F. SSF a.0 sq ft/gpd Number MincTaMinim
<br /> Sc :i Capacity 1.-Mt
<br /> of Liquid Garbage
<br /> ry Disposal
<br /> TRENCH BOTTOM AREA Bedrooms (galpmeion) (g
<br /> H. For trenches with 6 inches of rock below the pipe:
<br /> A x F= x = s ft of bottom area 2 orless4 00 1,1255
<br /> q 3 or 4 1,000 1,500
<br /> I. For trenches with 12 inches of rock below the pipe: 5 or 6 1,500 2.250
<br /> A x F x 0.8= x. x 0.8=; ,sq ft of bottom area 7 or 8 2,000 3.000
<br /> J. For trenches with 18 inches of rock below the pipe: over 9 See fig.C-6 (x 1.5)
<br /> A x F x 0.66= ')Std x a.0 x 0.66= 990 sq ft of bottom area So4 Otaracterinas,,nequire Areas for seer.se>;<,m„we
<br /> K. For trenches with 24 inches of rock below the pipe: Percolation y„ Tr"-" dulemo
<br /> AxFx0.6= x x0.6= sq ft of bottom area sonTeXtt �,-
<br /> BED BOTTOM AREA Faster than 0.1' Coarse Sand -
<br /> -
<br /> L. For seepage beds with 6 or 12 inches of rock below the pipe; 0.1 to s Sand 0.83 0.60
<br /> Pag 01 to s Fine Sand" 1.67 0.60
<br /> 1.5 x A x F= 1.5 x x = sq ft of bottom area 6 to 15 Sandy Loam 1.27 0.79
<br /> 16 to 30 Loam 1.6 0.60
<br /> 31 to 45 Silt Loam 050
<br /> ROCK VOLUME IN CU FT46 to 64) a 0.24
<br /> Slower than 60"' ay - (024)
<br /> M. Rock depth below distribution pipe plus 0.5 foot times bottom area:
<br /> ge treetinerd
<br /> M=Rock depth+6 inches x Area(H I,J L K) K' tar percniable soda.
<br /> P •'salMarina sac a mored tam w x d
<br /> eery fire.arid( ft)x "`1D =P AID cu ft -soil with too high a pamaag d day tar
<br /> uutatLden d.n inBau,d nanda,d ire.,.
<br /> ROCK VOLUME IN CU YDS
<br /> N. Volume in cu ft divided by 27
<br /> M+27=cu yds +27= ')3 cu yds
<br /> ROCK WEIGHT
<br /> O. Cubic yards times 1.4=tons 6 inches= 0% Reduction*
<br /> N x 1.4=tons r)3 x 1.4=/o P. tons • 12 inches=20% Reduction
<br /> 18 inches 34%'Reduction
<br /> DISTRIBUTION 24 inches=40% Reduction
<br /> (Check one based on slope) *Sizing for gravelless trench
<br /> Bed(less than 6%slope)
<br /> Trenches
<br /> Drop boxes(any slope)
<br /> Distribution box(level to slightly sloping)
<br /> "'1:t:;,-**�t�f**:?:I:f:t: T
<br /> TRENCH LENGTH „•ti.ti.�•ti.�•,ti•ti.�.ti.ti•ti.ti
<br /> 1.1.1.1.1.1.1.1.1.1.1▪.1.1• 2in'II(cch Cover
<br /> P. Select trench width= 3•v ft 1.1.1.1.1.1.1.1.1.1.1.1.1•
<br /> . 1.1,1,1,1 1,1.1,1,
<br /> Q. Divide bottom area by trench width: (H,I,J,or K) +P = *PPP:, %.1:::::::::::
<br /> lineal feet *PPP:. :141▪.1.1• 4 inch Pipe
<br /> 90 Z =2o lineal feet f:1.1.1.1 1.1.1-
<br /> 1.1• 1.1.1.1.1•
<br /> LAWN AREA ",ti•ti•ti•ti• :.,•�•~., -
<br /> . 1.1.1.1.1• t•f•1.1.1.1•
<br /> ,ti.ti.ti.t.ti.ti.ti.ti.l.ti.ti.1.ti..t II
<br /> R. Select trench spacing,center to center= ' feet Lti:{f;rtif{{{f;{{'•{r{f f{{ti{; )q:
<br /> • 1.1.1.1.1.1.1.1.1.1.1.1.1•
<br /> ,�,ti.ti.ti.ti,ti.ti.�.ti.ti.ti.�.ti.ti
<br /> S. Multiply trench spacing by lineal feet R x Q=sq ft of lawn area ;;x5:4:44:13%{`{fti'ti'•ti'{fti 6-24 inch
<br /> ••1.1.1.1.1.1.1.1.1.1.1.1.1•
<br /> x 54 =,P(J•I(.) sqft �1ti1~1:1�1�1:P.741~rti1�1�1�Rock Below the Pipe� tir?rtirtiftiftiftir r`f~ftir?ftir:
<br /> tif�fti,,ti, titi.ti•%•%•%•%•%•%•tifti.▪%• •%•%
<br /> LAYOUT(Use other side) �ti,ti• ti. . .,,,,,,,,,•,
<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 /> J improvements, existing or proposed
<br /> .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. Figure D-26
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