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TRENCH ANO BED WORKSHEET
<br /> 1. AVERAGE DESIGN FLOW A-t: Estimated Sewage Flows In Gallons per Day
<br /> A. Estimated Li 50 • •d(see figure A-1) number of
<br /> or measured x las(8a - •ctor)_ gpd bedrooms Class I Class II Class Ill Class IV
<br /> B. Septic tank capacity ' 0 c./ a,a allons(see figure C-1) 2 430050 33000 218 of�the
<br /> e
<br /> u S f. t St,O 'vasal r44 t l-trvvtip, - - .0.\ 500,3„1-i'rkels, 4 600 375 256 values
<br /> -"014-V 4- /0019 'C)oSllab (-Week') ,1154- *--.1_, 5 750 450 294 In the
<br /> 2. SOILS (Site evaluation data) 6 goo 525 332 Class I,
<br /> C. Depth to restricting layer= feet 7 1050 600 370 u,or III
<br /> 8 1200 675 408 columns.
<br /> D. Max depth o system Item 2C- ft= ft-3 ft= ft
<br /> E. Texture ercolation rate ') •S MPI
<br /> F. Soil Sizing Factor(SSF) _sqft/gpd(see figure D-15)
<br /> G. %Land Slope % Gi:Septic Tank Can.dties cin gallons)
<br /> 3. TRENCH or BED BOTTOM AREA Number of Minimum Liquid Liquid capacity with Liquid capacity
<br /> Bedrooms Capacity p ag with dil&
<br /> Bed
<br /> H. For trenches with 6 inches of rock below the pipe: lift inside
<br /> A x F= gpd x sq t/gpd= sqft 2 or less 750 1125 1500
<br /> I. For trenches with 12 inches of r k below the pipe: 5 or 6 1500 1500 0 2000
<br /> A x F x 0.8= gpd x sgft/gpd x 0.8= sqft 7,8 or 9 2000 3030 _ 4000
<br /> j. For trenches with 18 inches of r k below the pipe:
<br /> A x F x 0.66= gpd x , sqft/gpd x 0.66= sqft Fetor(ooll Characteristics> aand Soil Sizing
<br /> K. For trenches with 24 inches of r k below the pipe: Percolation Rate sou Slairta Factor
<br /> inlnutn per Inch sou Texture .quare feet/gadore
<br /> A x F x 0.6= gpd x sqft/gpd x 0.6= sqft cmpit perday(sgft/xpd)
<br /> L. For gravitybeds with 6 or 12 in es of rock below the pipe;e; faster than 04° coarse sand 0.33
<br /> 1" p 0.1 to s Medium sand 043
<br /> 1.5 x A x F= 1.5 x_gpd x sqft/gpd= sqft 0,1 t,,» p1'j Nand 1.67
<br /> For pressure beds with 6 or 12 in es of rock below the pipe; i to
<br /> 30 Loam
<br /> _Viola. !'�
<br /> A x F= y So gpd x a. sq /gpd= 70 0 sqft 31sers_____- ..
<br /> 46 to a0 Gay loam 2.20
<br /> Sandy clay
<br /> 4. DISTRIBUTION(Check all that a ly) Cl yd'y
<br /> over 61 to 1�••• CV 4.20
<br /> Sandy clay
<br /> Bed (<6%slope) Drop b es(any slope) V Rock slower than 1 silty clay
<br /> Trenches Distrib 'on box(<3%) Chamber •u.estems for n dl
<br /> •Y y permeable awls
<br /> I Pressure Gravity Gravelless pressure dber%utlanor serial diaail,unon with
<br /> no bench a25%or the total system.
<br /> "soil oun 30%or mon fine sand plus very fine sand. cl C( ,`,
<br /> "'A mound mustbe sand.
<br /> 5. SYSTEM WIDTH,LENGTH and I VOLUME `A"o°"'or performance system must be used
<br /> M. Select trench width= ft D-9: Soil Characteristics and Soil sizing
<br /> N. If using rock,divide bottom area by width: (H,I,LK or L)+M= facto
<br /> n for Graveness Pipe
<br /> percolatlon rate
<br /> urinal feet/
<br /> c;)(7 0 sqft+ ft= j lineal feet iminutes/irtchl soil texture gallon/day
<br /> Rock depth below distritrution pipe plus 0.5 foot times bottom area: Fater than 0.1• coarse Sand —
<br /> 0.1 to 5 Medium sand 0.28
<br /> f
<br /> Rock depth in et+0 eet x A a(H,I,J,K,or L) i 0.mFine ysand
<br /> ( /.O ft+0 )x 900 sqft 119 O cult 6 to 15 Sandy NL art• 0�
<br /> Loarn
<br /> Volume in cubic yards=volume in cuft divided by 27 331 to
<br /> Slit 067
<br /> Silt
<br /> I 1 C)0 cuft+27= LI 3 cuyds 46 t0 6o Clay Loam(CL) 0.74
<br /> SandWeight of rock in tons=cubic ya ds times 1.4
<br /> slower that 60'•' tyy�C,L
<br /> cls
<br /> `}3 cuyds x 1.4= (op ns Sandyay —
<br /> O. If using 10"Gravelless Pipe, FlOw(A)x Gravelless SSF(see figure D-9)
<br /> Silty Clay
<br /> 'Soil too coarse for sewagetreatment.
<br /> gpd x linealfeet/gpd= lineal feet Use systems for rapidpermeable soils.
<br /> P. If using Chambers,H,I,J,or K(based on height of chamber slats)+ du h.vfnto oxgh a per lime sandf day
<br /> fine sand.
<br /> gh 'Sou with Too high a penmtage of clay for
<br /> width of chamber in feet(M) butallatlon of a standard inground system.
<br /> sqft+ ft= ; lineal feet , deatii.rair
<br /> T/7�ta-^°,wsa2,�,St ra.wc...
<br /> 6. LAWN AREA �.�� . pi o
<br /> alt ,
<br /> sA
<br /> Q. Select trench spacing,center to canter= feet *"y� d"'`.�.q
<br /> R. Multiply trench spacing by linealjfeet R x Q=sqft of lawn area '" �
<br /> ft x lineal feet= 9 O sqft t-t - 'r x- ti-4t= 6-24•Rock 1)
<br /> A..,,,,�Y .tf.r,i 3/421/2" a
<br /> 7. LAYOUT
<br /> Me mde,
<br /> `}
<br /> Include a drawing with scale(one inch= ,.C) feet). Show pertinent property boundaries,rights-of-way,ease-
<br /> ments, location of house,garage,driveway,and all other improvements, existing or proposed soil treatment system,
<br /> well and dimensions of all elevations,setbacks and separation distances.
<br /> I hereby certify that I have completed this work in accordance with applicable ordinances, rules and laws.
<br /> - P- •— (signature) 39 y. (license#) 9—a\--1 -O -2— (date)
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