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li',,lJl\ll>Lu\L:::,LVvt\1..,l IHl1\lf\ll.1\il :"l\:-,ILl\·l \\Uh.t,.'1tll.l I
<br />;\
<br />11
<br />I <,{1111.it<'d
<br />n1,•;i<,11r!'d
<br />rtow
<br />X gpd
<br />SEPTIC TANK \IOI.UMI-
<br />13d) gallons
<br />SOILS (Site 1'v,1luation daL1)
<br />( · Depth to restricting layPr ~ .'i, 3 __ __ IPPt
<br />I) Maximum depth oJ systPm C -3 ft = __ l_1__3__ _ f1•cl
<br />1: Texture 51:-r-dij {~ Percolation rate/21 ~.~Ml'I
<br />F SSF l/:i'Z_ sg ft/gpd
<br />TRENCH BOTTOM AREA
<br />H. For trenches with 6 inches of rock below the pipe:
<br />A x F = __ x __ = __ sq ft of bottom area
<br />For trenches with 12 inches of rock below the pipe:
<br />A x F x 0.8 = __ x __ x 0.8 = ___ sg ft of bottom area
<br />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 are.1
<br />K For trenches wilh 24 inches of rock belm-v the pipe:
<br />Ax F x 0.6 = _______ x ___ x 0.6 = __ sq ft of bottom ar1•,1
<br />BED BOTTOM AREA
<br />L For Gravity 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 \•Vith 6 or 12 inches of rock below the pipe;
<br />Ax F = __ x __ = __ sq fl of bottom area
<br />ROCK VOLUME IN CU IT
<br />M. Rock depth below distribution pipe plus 0.5 foot times but tom 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 cu ft divided by 27
<br />0.
<br />M + 27 = cu yds _ + 27 = __ cu yds
<br />. ROCK WEIGHT
<br />Cubic yards times 1.4 = tons
<br />N x 1.4 = tons X 1.4 =
<br />DISTRIBUTION
<br />tons
<br />(Check one based on slope) __ Bed ( < 6% slope)
<br />Trenches ✓ Drop boxes (any slope) __ Distribution box ( < 3'¼,)
<br />SYSTEM LENGTH
<br />P. Select width = ft
<br />Q. Divide bottom area by width: (H, I, J, or K) + P = lineal foet
<br />lineal feet
<br />Gravelless Pipe
<br />( 10" :A x F + 3)= Lineal Feet ( 8" :Ax F + 2)= Lineal Feet
<br />Chamber (A x F + width of chamber)
<br />/..fiZx 2S::2. + -3._ = 'if.6_l incal feet
<br />LAWN AREA
<br />H.. Select trench spacing, center to center = D<'('t
<br />S Multiply trench spacing hv lineal ie<'I h'. x (_)" sq 11 o/ l.1"·11 M,•;1
<br />'f / /3?_ >-;s le::fo/_(),,,1 11
<br />LAYOUT (Use other c:idc)
<br />l. Sl'h'ct an appropriate scak; one squar<'
<br />2. Show pertinent property boundaries, nght-ol-way, ('d<,('llwnh
<br />1. Show location of house, garage, driveW,l\', ,ind ;ill otlw,
<br />1mprovenwnts, existing or pruposed
<br />.J. Show location and laynut uf <,1'w<1g1' treatnwnt ,-,v,-,tem
<br />5. Show location of water supply well. ·
<br />6. Dimension all set backs and separation distann's
<br />(:s11matnl Srw;11•t· I-Im~ 111 < ;,1ll.i11, pn I >av q,~pdl
<br />--~ ·-
<br />N11111lw1
<br />of .hi'<' I ·11,,,. II
<br />Hrd1oom~
<br />:1 1(HI _1 _)')
<br />/4 \0 llkl
<br />4 t,(X) \'/ \
<br />\ 7\0 ,\\0
<br />I, 'XXI .\,:'l'-1
<br />7 10\0 h(HI
<br />8 I 2<XI h7.\
<br />Numhcr Mllllllllllll
<br />.\cpllr Tank of l,1quul
<br />Hedrnoms Caparit~
<br />(~;dlon!>l
<br />--~---
<br />2 or less 750
<br />3 or4 1.000
<br />5 or 6 1.500
<br />7 or 8 2.000
<br />over 9 Sec fig. C-6
<br />Faster lhan 0. 1 •
<br />0.1 to 5
<br />O.l to 5
<br />6 to 15
<br />16 to 30
<br />31 to45
<br />46 to 60
<br />Slower than 60" ..
<br />~o;ir~e Sand
<br />Sand
<br />Fine Sand•"'
<br />~andv Loam
<br />U:,am
<br />Silt Loam
<br />Clav Loam
<br />Clay
<br />hp.-Ill 'l\p,. I\'
<br />180 ---t,(j•4
<br />~18 "' 2)(1 lhC'
<br />29~ v.iluc.,
<br />'" '1:~ llh•
<br />\7() nthu
<br />·Ill~ lttlunu,,
<br />Mm1mum
<br />Capanty with
<br />Garbaie
<br />Disposal
<br />!gallons\
<br />1.125
<br />1.50()
<br />2.25()
<br />3.000
<br />(X 1.5)
<br />0.83
<br />1.67
<br />1.27
<br />1.67
<br />2.00
<br />2.20
<br />1.20
<br />0.60
<br />0.79
<br />0.60 a.so
<br />0.45
<br />(0.24)
<br />• S.lii h>..1 (tlil.l!--l' !,11 '.;,l'K,1f;t• tn•,1t1nent
<br />Ux-~vstcm:-. for r,1p1dly permiilblt: :-tlll$.
<br />•• Snil h"a,·mr; so·;,., tlf tthli-t.• u! lme or \'t.'>y lmt.' sand .
<br />... s~Jil wilh too high a percentage of day for
<br />installc1tion of an inf,';round standard system.
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