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<br />SFPTIC TANK \IOUJMI
<br />;;;,e_,/3CJ:::.J g.1ll,,11~
<br />SOILS (Sit<-<',·.1'11;1t1,111 ,Lit;i)
<br />I )<'pth to restrict mg lay('! '--/.CJ
<br />l\1;1ximum depth of syst<'rn ( · ::i ft
<br />Tl'xtur(' ':>e~M."'. _ l\•f"l'nl,1t1011 1,11!'
<br />SSF ).~~-sq ft/gpd
<br />/. {)
<br />3--z_'j
<br />TRENCH BOTTOM AREA
<br />f ( 'l't
<br />fl'Pt
<br />MPI
<br />hir trenches witJ1 6 inch('s 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 sq ft of bollom ar<'a
<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 ilr<'.l
<br />For trenches with 24 inches of rock below the pipe:
<br />A x F x 0.6 = x ___ x 0.6 = ___ sq ft of boll om Ml'il
<br />BED BOTTOM AREA
<br />For Gravity beds with 6 or 12 inches of rock belmv the pipe;
<br />1.5 x Ax F = 1.5 x x sq ft of bottom area
<br />For Pressure beds with 6 or 12 inches of rock below the pipe;
<br />A x F = __ x ____ = __ sq ft of bottom area
<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,l,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 ~rop boxes (any slope) __ Distribution box(< 3°/4.,)
<br />SYSTEM LENGTH
<br />Select width ft
<br />Divide bottom area by width: (H, 1, J, or K) + P = lineal f<'et
<br />lineal feet
<br />Gravelless Pipe
<br />( 10" :Ax F + 3)= Lineal Feet ( 8" :Ax F + 2)= Lineal Feet
<br />Chamber (A x F + width of chamber)
<br />7~ x/, 67 + :.i._ ='ii$ lineal feel
<br />LAWN AREA
<br />Select trench spac111g, ,,·nt<'J to center _ ,5____ ft•pt
<br />i\,1ultiplv trench spacing hv lineal f('<'I Rx Q sq ft nl 1.n\·n .u, .. ,1
<br />'ll!L x S 2010 "'l ft
<br />LAYOUT (lJsC' otlwr ~id<')
<br />Svl!•ct an appropriatl' scak; one squarl' fe!'t
<br />2. Show pertinent prop,'rty boundaries, right-of-way, <'<b('flH•nh
<br />.l. Show location of hous!', garage, drivewa\·, and all otlw1
<br />m1provenwnts, e>.1st1ng 01 pr,111\\~,<'d
<br />4 Show location and l<1v,,ut of scwag<' tr,·.1t11H·11t :,vsll'm
<br />r, Show location of 11\1 ater supply well.
<br />(1 Dimension all set backs and separation distanc!'~
<br />l·,11ma1t·d \rw.q•c l·l,rn 111 ( ;,dln11, f't'I l),I\ q.~pd)
<br />Nn111h1·1
<br />ol l\'fll' l 1\1•,· 11 hp,· Ill ·h·p,· I\' lfrd1rnHII~
<br />1(~1
<br />.1 ·'" 1~11 h!I•, 4~0 \IX I .'18
<br />4 <i(Xl 17', }"''' th,-
<br />7~0 -1\() .'t).j •-1h1,·,
<br />9(XI \J<.. n~ "' ,,
<br />th,
<br />7 1mo MXI 17() ••th,·,
<br />X 12(XI (,7., 40~ •nh1111,1s
<br />Number Mm1mu111 1'-1m1m11m
<br />Sep11r ·1 ant < ·ap;1c11\ \\'ilh of l.1qu11i <i.1111:,r,·
<br />Bedroom, Capac,1~ D1spo~a!
<br />(J!allon:-.l q.:.allonsl
<br />2 or less 750 1.125
<br />3 or 4 1.000 1.500
<br />5 or6 1.500 2.250
<br />7 or 8 2,000 .'1.0<Xl
<br />over 9 Sec fig. C-<, (x 1.5)
<br />S..111 Ch;:ttM1t•n:-.hc:, & R,·quu,-..i ,\u•.-1-. 1.,, ~-1,.-1~:•· lr,·.um,·nl
<br />l't'rc,il,1t11mR.:1h'
<br />Mmuks per 1rn h
<br />(mp1)
<br />Faster than 0.1 •
<br />0.1 toS
<br />0.1105
<br />6 to 15
<br />16 to 30
<br />31 to45
<br />46 to 60
<br />Slower than 60 .. •
<br />;~-----,----
<br />t :,...,.,,,. ... ~' l <.:.,1~."
<br />Snd 1 l'-...1 lJrt' I 1 ~~ ;~1~~~-! 1t;~:;~"
<br />_____ L---_ __ J _ _::__
<br />~oar~e Sand ·1
<br />Sand 0.83 1.20
<br />Fine Sand.. 1.67 I 0.60
<br />f:iandv Loam 1.27 \ 0.79
<br />Loam 1.67 I 0.60
<br />Clav !.,,am 2.20 0A5
<br />C_'Jav -----(0.24)
<br />Sill Loam 2.(:J0 0.50
<br />1--------~-~---'---------
<br />• S..1il {l),.}Ct)t\r.,t• l,11 ~•wai::,· th!Aln)t'nl
<br />U:,c <:-\':-.lt>ms tor r,1,p1.ilr 1wrm1,1,blt:' :,.,.111:,..
<br />•• Soil tlrt\.'tng 50% or mllrt:' ~lf IUh' l" Vl'ry llnt' :-..1nd
<br />~--S.lil with too high a ~rcentage of day for
<br />installation of an ingniund standard ~y~h..'fll.
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