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• INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET
<br /> FLOW Estimated Sewage Flows in Gallons per day
<br /> A. Esrimated �C� U gpd �g��
<br /> � measured — x 1.5= — gpd um r
<br /> SEPTIC TANK VOLUME of Type I Type II Typc IlI Typc
<br /> B. �. _/c�o�� g
<br /> allons Bedrooms 1V
<br /> 2 300 225 180
<br /> SOILS(Site evaluation data) 3 450 300 218 0�
<br /> � , �� � n 4 600 375 256 �,I�a
<br /> C. Depth to restricHng layer= 4 -(o -t�D (o -`1 feet 5 750 450 294 ;,,
<br /> D. Maximum depth of system C-3 ft= I •S�(o a.o feet 6 900 525 332 TI�ori•
<br /> E. Percolation rate ,[_(�.S MPI 7 1050 600 370
<br /> F. Soil Sizing Factor "l. lo')sq ft/gpd (Sce table 3? g 1200 675 aos �o�,u,l,5
<br /> TRENCH BOTTOM AREA Septic Tank Capacitics,in gallons
<br /> H. For trenches with 6 inches of rock below the pipe:
<br /> A x F= x = ft of bottom area Number of Minimum Liquid Liquid capacity with
<br /> SQ Bedrooms Capaciry garbage disposal
<br /> I. For trenches with 12 inches of rock bclow the pipe: a�
<br /> AxFx0.8= (acx� x���x0.8= vlsqftofbottomarea�►o`�,=�4S1 23a45 io�o�o �5�
<br /> J. For trenches with 18 inches of rock below the pipe: a o�6 tsoo 22so
<br /> A x F x 0.66= x x 0.66= sq ft of bottom area �'8°�9 200° 3a�
<br /> over 9
<br /> K. For trenches with 24 inches of rock below the pipe:
<br /> AxFx0.6= x x0.6= sqftofbottomarca
<br /> BED BOTTOM AREA
<br /> L. For seepage 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 Soil Characicristics ynd Rcquircd Arc•rs
<br /> foe Sewagc 1�calmcnt
<br /> ROCK VOLUME IN CU FT PercolatimRaeein Squam Gallons
<br /> M. Rock depth below distribution pipe plus 0.5 foot times bottom area: us„u���r�,�n Soil Tezturc r�� per day per
<br /> (�1) gallon per square foot
<br /> M=Rock depth(ft)+6 inches x Area (H,I,J,L or K) a�y
<br /> (� ft+0.5 ft)x ��sl =1'��1 cu ft Fastcr than 0.1• Coacu Sand ---- -----
<br /> ROCK VOLUME IN CU YDS o.i�s Sand o.s3 i.2o
<br /> 0.1 w 5 Fine sand•• 1.67 0.60
<br /> N. Volume in cu ft divided by 27 6to�s Sandy Loam �. � 0.�9
<br /> M+27=cu ds +27= cu ds �°'m 6' o.�o
<br /> y L�31 �L1 y 3i aas �r m z oso
<br /> ROCK WEIGHT a6 w 6o c��Y�m Z.�o o.as
<br /> Slowcr than 60•`• Clay ---- -
<br /> O. Cubic yards times 1.4=tons
<br /> Nx1.4=tons�_x1.4=�tons
<br /> DISTRIBUTION
<br /> (Check one based on slope) � f•r•r•r•f•f•f•f•f�:�f:f•f T
<br /> ,•�,ti,ti,ti.ti.ti.•�.ti.•,.•.••,• ti•
<br /> Bed (less than 6%slope) ,f•f•f•f•f•r•r•r•f•f•f'r•r, 2 inch Covcr
<br /> ti•ti•ti•ti•ti•ti•ti•'.•'.••••'••' �
<br /> f�f.r.f.f.l.f.f.f���t•��l�t
<br /> Trenches ' ���''�''���
<br /> � r•f'r'f' ��f::'t�t
<br /> :ti.ti.•.•ti• . . ti..
<br /> ✓Dro boxes(an slo ) f'r'�• '�f�r��'
<br /> .ti.ti.ti:�
<br /> p }� � f.r.f. 'r;r•r•f 4 inch Pipc
<br /> Distribution box(level to slighdy sloping) �'�'�'� .
<br /> t•t•t•f• •l•f•f•�
<br /> � ti ti ti• ti•'••ti•'
<br /> TRENCH LENGTH f f f r�r� �f f•r�f�f
<br /> ti,ti,.,,ti,.,. . . ti,.,..
<br /> f.f.f.r.;.f.f.r•:•f•r•:•r /�
<br /> P. Select trench width=_�ft ~��������'�~�t�~��������������� 1 a
<br /> ltiftiftiftiftif.�f.�ftif�ftif.�f�:tif.
<br /> Q. Divide bottom area by trench wid th: (H,I,J,or K)+P= f�'�f�f�f�f�f�r�''f�f'•��l�r'
<br /> ti•ti•ti•ti•'.•1•'.•ti•
<br /> l'r•f�f•f�f•r• •f•j•f•f•r•f 6-24inch
<br /> . ti•ti•'.•ti•ti•'L•ti•ti•'.•1•.�,ti..
<br /> lineal feet ' f'''f'f'f'f'r'f"'f�'�r�f'
<br /> rti•ti•ti•ti•ti•ti•ti•ti•ti'ti'ti''•'ti''Rock Delow the 1'i
<br /> •r•r•r.r•;•f•r•r•:•r•;•:•r• P'
<br /> + ':'�'�'ti'ti'''ti�~'~'~'~��'��'�� I
<br /> 4�1 �_�' lineal feet : r.r.r.f.f.r.r.f.f•:.:•f.:
<br /> .�.�.�.�.�.�.,,.�.•......,.�.... .L
<br /> f.f.r.f.f.f.r•r•r•r•f•r•:
<br /> LAWN AREA ti.ti•ti•ti•ti.ti.ti.ti.•.•.,..,,ti..,..
<br /> 'r;r;f•r;r;r;f;r•r•r;r;f•f•r
<br /> R. Select trench spacing,center to center= � feet
<br /> S. Multiply trench spacing by lineal feet R x Q= sq ft of lawn area
<br /> �x�_=�ylsqft
<br /> LAYOUT(Use other side)
<br /> i 1.Select an appropriate scale;one square= feet.
<br /> 2.Show pertinent property boundaries,right-of-way,easements.
<br /> 3.Show location of house,garage,driveway,and all other
<br /> improvements, existing or proposed
<br /> 4.Show location and layout of sewage treatment system.
<br /> 5.Show location of water supply well.
<br /> 6. Dimension all set backs and separation distat�ces.
<br />
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