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<br />750
<br />X gpd
<br />SEPTIC TANK VOUJMI
<br />l 3oo g.i11011~
<br />SOILS (Silt' ,·v,du.it1n11 d.1t.1)
<br />I Jqith 1<1 restricting lavn S. 0
<br />t\'.1,1xm111m depth of system C -1 ft , 2-D
<br />le, -I 6
<br />f,•t•t
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<br />I l'xtun· _2_~y/~l\•rcolat1011 r,1tl'
<br />SS F /,_l,_7_ __ sq ft/ gpd
<br />TRENCH BOTTOM AREA
<br />For trenches v,,rith 6 inches of rock belcn•v the pipe:
<br />Ml'I
<br />A x F = x sq ft of bottom arc;1
<br />l'nr trenches wiU1 12 inches of rock bclcnv thl' pipe:
<br />Ax F x 0_8 = __ x ____ x 0_8 = ____ sq ft of bottom ,nea
<br />For trenches wiU1 18 inches of rock below the pipe:
<br />A x F x 0_66 = __ x __ x 0.66 = _____ sq ft of bottom arl'a
<br />For trenches wiU1 24 inches of rock below the pipe:
<br />A x F x 0.6 ___ x __ x 0.6 = __ sq ft of bottom area
<br />BED BOTTOM AREA
<br />For Gravity beds with 6 or 12 inclws of rock below the pipe;
<br />l .5 x A x F = 1.5 x x sq ft of bottom area
<br />F()r Pressure beds with 6 or 12 inch('< ,1J n,ck below the pipe;
<br />A x F = x sg f1 ()j bottom area
<br />ROCK VOLUME JN CU FT
<br />!Zuck depth below distribution pipe plus 0.5 foot tmws 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 />Volume in cu ft divided by 27
<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 V----Drop boxes (any slope) __ Distribution box ( < 3°/4,)
<br />SYSTEM LENGTH
<br />Select width = ft
<br />Divide bottom area by v,,ridth: (H, I, J, or K) ~ P = lineal tl-'ct
<br />lineal feet
<br />Gravelless Pipe
<br />( 10" :A x F + 3)= Lineal Feet ( 8" :A x F + 2)= Lineal h·et
<br />Chamber (Ax F + width of chamber)
<br />~x fil + ----'3_ = ~lineal feet
<br />LAWN AREA
<br />Select trench spacing, center to center= Lfeet
<br />Multiply trench spacing by lineal fC't'l F. x Q = sq It of L1w11 .in•,,
<br />'/~ X _,5__ ~ sq tt
<br />LAYOUT (Use other side)
<br />} _ Select an appropriate scale; one square il'l't
<br />2_ Show pertinent property boundaries, right-of-w,iy, <'asenwnh
<br />:, Show location uf house, garagt', drivcw.iv. ,111d ,ill ()th,•1
<br />improvenwnts, t'xisting Ill prnp,ist•d
<br />-1. Shov,, location and layout of ~ewag<' trealnwnt sv°'tvm
<br />5. Show location of waler supply well.
<br />h Dimension all Sl'l backs and sep;ir,1tinn dista11<t",
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<br />\!Xl .'~l\ 180 hi'I'\ ·1'<0 \()(J :lh
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<br />7'<0 ·1'<0 :_-,q,1 \.1hw,
<br />"' " •KX) '<''< 1'7 lh,
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<br />2 or less 7'.iO 1.12.'.i
<br />3 or 4 1.rnx1 1.)()()
<br />5 or /1 l.'.iOO 2_2'.,0
<br />7 or X 2.()()() ,_()()()
<br />over 9 Sec fi~. C-<1 I ( \ l'.11
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<br />S,.111 ChM.:t(h'n:,110, & Rt~m-..1 ~~,_,,,1-.1_",'----'-'-----
<br />l'1•rc,1IAll,m Rillt-t . . . , , : :;-.!•:~,;:,1., .. ;:--,1\~,': r:~:~•;::~~":':. is::~lr:~ :•~:) -~· "' ; •·-.~:-···
<br />0 I lo 5 Sand I LI~' I .20
<br />0 1 lo 5 Fm.e Sand•· i 1 (,? 1 O.t,(l
<br />6 to 15 and\' Loami 1 2;-ti 79
<br />16toJO I Loam !Jc,-060
<br />:n tn 45 I Silt I .oan, 1 ~ (hl O ~,tl
<br />46 to tl!l I Cl..i.,· l .n,1m : 2 ~(l l) -r-.:.
<br />-~in-~~Pr ~1a~ hO~ ___ ( ·1~,-___ .. :__ · {O :1.; !
<br />• S..nl ltJ..1 co,u~• t,ir ~v.:a~~t• u,•<1t111,•111
<br />U~ ::-\'!<km~ for 1,1pidh· p~·mu.1hl,· ::--.111,
<br />.. Soil hil.vin~ 50% nr m,~i-e ,1t fm~ ,u v~ry tuw :---Hh1
<br />... Soil with too high a percentagl' uf day hu
<br />installation o( an inground stand;mi !'-ystt•m
<br />.)9.ff~e~µct~~n *
<br />'c20J'&R.educhon
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<br />A~~i6Uess•·•h"~nch
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