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• INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET
<br /> FLOW Estimated Sewage Flows in Gallons per day
<br /> A. Estimated y�J gpd (gPd>
<br /> measured x 1.5= gpd um r
<br /> �/ SEPTIC TANK VOLUME of Type I Type II Type IlI Typc
<br /> B. =. - /D D ;'� gallons Bedrooms IV
<br /> 2 300 225 180
<br /> SOILS(Site evaluation data) 3 450 300 218 0�
<br /> C. Depth to restricting layer= 7 7 � feet 5 7p 450 294 �';��
<br /> D. Maximum depth of system C-3 ft= � ,O � fect 6 900 525 332 �i��'
<br /> E. Percolation rate a ��-1 MPI 7 1050 600 370 I�
<br /> F. Soil Sizing Factor .1�7 sq ft/gpd(See table 3) L—�5 �'''��n/� � g 1200 675 408 �oi,,,,�
<br /> TRENCH BOTTOM AREA
<br /> Scptic Tank Capacities,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 /> � Bedrooms Capacity garbage disposal
<br /> I. For trenches with 12 inches of rock below the pipe:
<br /> AxFx0.8= x x0.8= sqftofbottomarea 23or4s ioso�o isouo
<br /> J. For trenches with 18 inches of rock below the pipe: a o�6 isoo zzso
<br /> A x F x 0.66= x x 0.66= sq ft of bottom area �.8 or 9 200o s000
<br /> o��9
<br /> K. For trenches with 24 inches of rock below the pipe:
<br /> AxFx0.6= x x0.6= sqftofbottomarea
<br /> BED BOTTOM AREA
<br /> L. For see age beds with 6 or 12 inches of rock below the pipe;
<br /> 73o ss�. .
<br /> A x F=fi�x u.a U x l.�=S'7 I sq ft of bottom area, , Soil Charactcristics and Rc uircd Arcrs
<br /> � �+vA,����+a'�L� q
<br /> for Scwagc 1Ycatmenl
<br /> ROCK VOLUME IN CU FT,s
<br /> F'crcolacim Ratc in Squaic Gallons
<br /> M. Rock depth below distribution pipe plus 0�foot times bottom area: �,�����,�n soa T�x��� r��t per day per
<br /> (A'll'I) Ballon per sqwre f«x
<br /> M =Rock depth(ft)+6 inches x Area (H,1,j,L or K) d,
<br /> (� ft+0 a ft)x�_��cu ft Faster tlun 0.1• Coarse Sand ----- -----
<br /> ROCK VOLUME IN CU YDS o.i ws Sand o.s3 �.zo
<br /> o.i w s r-��:��a�� �. 0.60
<br /> N. Volume in cu ft divided by 27 6�a�s SandZLoam .27 0.�9
<br /> M+27=cu ds� +27= Scu ds 16`°3° �"" . � o.�°
<br /> }� �1 � }� 31 to 45 Silc Loam 2.00 0.50
<br /> ROCK WEIGHT 46��o c��y�m z.zo o.as
<br /> Slower lhan 60••w Clay -.-- -----
<br /> O. Cubic yards times 1.4=tons
<br /> N x 1.4= tons�x 1.4= y 9 tons
<br /> DISTRIBUTION
<br /> (Che k one based on slope) ���s'-'`�����' ••• T
<br /> f•J'•f•f•f•r•l•l•t•t•:�r�l•l
<br /> �Bed (less than 6%slope) ������������������ � � ~�
<br /> f•t•t•r•f•J•r•t•t�f�:�l�l•r 2 inch Covcr
<br /> ti.ti.•.•5�•t•1•'. ti.•,.•,.•,.
<br /> . l•t•f•l•t•f•l•l•f���f•f�1�f
<br /> Trenches .•�r�f�f�:•��� .;f;:�•f'f i
<br /> —Drop boxes(any slope) f�f''''�� '��f:f'' � ��
<br /> ti.,.•ti.•.
<br /> r•r•r•r• ''r�t•J'�f -�inch Pipc
<br /> -- Distribution box(]evel to slightly slopi�lg) ~'�''`'~ ' �
<br /> l t t t l�l•t�:
<br /> TRENCH LENGTH l�l�r~l�t• tir:r: �l�f
<br /> t�t•l�J�l�:•r•r•r•.��:�.•�:•�l
<br /> P. Select trench width= — ft f'f~r�f�f~f,'l�f~f'f�f�f�f�f ��
<br /> ti,•�,ti,ti•ti•'�••�,ti,ti•ti••�,•�,ti,•
<br /> Q. Divide bottom area by trench ti idth: (H, I,J,or K)T P= f•f•f•f•f�f�f�f'f�`�f"�f�f 1 a
<br /> , ti.ti.ti.ti.ti•ti.•.••..•.••..•.••..•.••
<br /> r't•r•r•r•r•f•r•r•r•r•. r•f 6-24inch
<br /> lineal feet ti.~.�.•.•�•�•~•~.~•-..-.••..~.•
<br /> f•f•r•r•:•r•r•r•f•:•r•:•f•r•
<br /> ti'ti'ti'�•ti'ti'ti'�'ti'ti''•'ti'" Rock l3clow the Pi
<br /> - linealfcet l'f''•f.f.:.f.:.f.:.:.:.;.f. �
<br /> ___.}___..__ �•1'�'�'1'�'t'�'t'�';:••'•••• �L
<br /> : f l•f :•f f.: : : : .•r�:
<br /> LAWN AREA ��� �� ~��� �����t������������
<br /> l•f•t•f•l•l•f•l•1'•f•f•f•f•;•
<br /> ti,ti,.�.ti.ti.ti.ti.ti•.�,.�,.�,.�,.�,.
<br /> R. Select trench spacing,center to cen ter= fcet f'�'f'f'f'f'f'f'f'''f'f'f'f
<br /> S. Multiply krench spacin�by lineal feet R x Q= sq ft of lawn area
<br /> �_x��=��sqft
<br /> LAYOIJT(Use other side)
<br /> 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 distances.
<br />
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