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J i'-i I JI \ I I J l . , \ I :-, I \ \ 1 \ \. , I I h I 1 \ I 1\ I I , '\. I :--, \ :--, I I . 1\ I \ \ , I I, t, .'-i I l l. I . I
<br />;\
<br />ll
<br />(
<br />IJ
<br />L
<br />F
<br />l·.,t1m,1l1•d
<br />m, ·.istirPd
<br />FLOW
<br />gpd
<br />.x gpd
<br />SEPTIC TANK VOi UMI
<br />.. g,illon~
<br />SOILS (Site evaluation d.it.1)
<br />Dcpth to restricting layer= ___ ---~t:)_
<br />Maximum depth of system C -3 It _J. 0
<br />Texture 5:e.r<L'(/Ql;Y\ _ Percolation rate /Y.~~'1_
<br />SSF LJ:i2_ sq ft/ gpd
<br />TRENCH BOTTOM AREA
<br />11·1•1
<br />11•1'1
<br />Iv! I' I
<br />I
<br />H. For trenches with 6 inches of rock below the pipe:
<br />A x F x __ sq ft of bottom arca
<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 bottom area
<br />For trenches with 18 inches of rock belmv 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 belmv the pipe:
<br />A x F x 0.6 = ---~ x __ x 0.6 = __ sq ft of bottom arc'd
<br />BED BOTTOM AREA
<br />L. For Gravity beds ,,vilh 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 belmv the pipe;
<br />A x F = x = __ sq fl of bottom area
<br />ROCK VOLUME IN CU Fr
<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 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 />(~ one based on slope) __ Bed ( < 6% slope)
<br />Trenches __ 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 />~+~=_lineal 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 />7.:i:L...x '1.i2 + ~ = f~lineal feet
<br />LAWN AREA
<br />R Select trench spacing, center to center c. 5 kct
<br />:-.; !\1ultiply trench spacing by lineal feet H. x ()-'sq Jt ol lawn ;nea
<br />'ti~--x _5 _ 2.p ?O :,, l f i
<br />LAYOUT (Us!' ,)tlw1 ',l<k)
<br />Sl'lect an appropriate• scale; one square f!'el.
<br />' Show pertinent prop('rty boundarie::,, nght-of-way, easenwnh
<br />1. Show location of house, garage, drivew;iv, ,md ,111 other
<br />1mprovcnH·11h, t>xisting (lf prupos,•d
<br />-l Show location and layout of :-,ewag(• ln•alnl<'nt ,ystl·m
<br />5. Show location of water supply well. ·
<br />6. Dimension all set backs and separation dist;mn•,-
<br />l·.,1un;11cd Srwarc I IP\\ 111 ( ;.ill11n, p,·, ll.,~ 1 gpd 1
<br />Numlwi
<br />"' l\llt I lv111· II
<br />lkdrno111~
<br />l(Xl ::':'\
<br />,j',(I l(Xl
<br />•l <,tXl ·n,,
<br />7.\0 ,j',()
<br />(, 'XXl ',2',
<br />7 j()',() MXI
<br />8 I 2(Xl (17',
<br />Nurnhcr M1111111um
<br />Scptir Tani.
<br />of L1quut
<br />Bedrooms Capant,
<br />u~allon~I
<br />2 or less 750
<br />_, or 4 l,(}(Xl
<br />5 or 6 1.500
<br />7 or 8 2.000
<br />over 9 See fig. C-6
<br />Fas(er than 0.1 •
<br />0.1 to 5
<br />0.1 lo 5
<br />6 to 15
<br />16 to 30
<br />31 to45
<br />46 to 60
<br />Slower than 60" •
<br />~oarse Sand
<br />Sand
<br />Fine Sand'"
<br />Sandv Loam
<br />Lt1am
<br />Silt Loam
<br />Clav Loam
<br />Clay
<br />""" Iii .hpc IV
<br />180 (,,n,;,
<br />:'18 .. ,
<br />]\(l 1hr
<br />19-1 \,du,·.,
<br />11:, "' 1hc
<br />_17() ntho
<br />-108 t11lu111t1,
<br />""11n11nu111
<br />Capacity Wllh
<br />Cl.uhatr
<br />Dispos;1I
<br />(gallon~)
<br />1.125
<br />1.5(}()
<br />2.250
<br />3.000
<br />(X
<br />0.83
<br />1.67
<br />1.27
<br />1.67
<br />2.00
<br />2.20
<br />I.SJ
<br />1.20
<br />0.60
<br />0.79
<br />0.60
<br />0.50
<br />0.45
<br />(0.24)
<br />----·--L-------'---J.
<br />• ~,ii h1<1 nliU!>C !111 scwas;e lrt•atm,:nt
<br />u~ !>\'sit'm!> for r,1pidly rx-rmiablc !-0.lib.
<br />·• S.oil h·;win~ 50% or mll~t' \l{ lint: or Vt..'r)' !me ~nd
<br />••• Soil wilh too high a percentage of day for
<br />installation of an ingmund standard system.
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