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MOUND DESIGN WORKSHEET <br /> ' ' � (For Flows up to 1200 gpd) <br /> A. �'LQw Estimated Sewzge F7ows in Gallons per da <br /> - Estimated �� ��_ gpd N�� �rra� Type II' Type III � <br /> or measured — x 1.5 = — gpd. <br /> 2 soo zu i so �, <br /> B. SEPT'IC TANK LIQtTID VOLUMES a �0 3'�s° is'6 °`'� <br /> s 75o aso 29a "�"� <br /> �,—/D O(� gallons 6 900 525 332 Ty�� <br /> : 7 1050 600 370 ❑a <br /> ; 8 � 1200 675 408 m <br /> C. SOILS (refer to site evaluation) — ' I �`d"�°` <br /> „ u. ' t.� • �i .�,� <br /> 1. Depth to restricting layer= ��-�� �� inches feet �yWd��r <br /> Nunt+a of Mldmum UWW Lkfuld t�p�cfry w4N wl�h dtputa <br /> 2. Depth of percolation tests = i �," inches � �� _��� "h'�'°� <br /> 3. Texture ���� Percolation rate co. `� mpi 2D�M� �� �� � <br /> S�K h I300 2730 )000 <br /> 4. Land slope 3 % '�"'Ky �°°° '°°° ""° <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock layer: A x 0.83 = <br /> u5� gpd x 0.83 sq. ft./gpd = � z sq. ft. +,��o �� ,o� <br /> 2. Select width of rock layer (max 10' if <120 mpi max 5') = i � ft. <br /> 3. Length of rock layer = area +width = .4Y-. ._ ��'A ' ��p� ' <br /> v....v e.o e'peP� � � � nC �46..._ a . <br /> � 41 o S ft. j �—ft. _ �. I ft. ���°:;A;�d Pe�L�Q' �..P-� . <br /> q' � Qe'va'oc" Crw� ,i,ve'.vy . p'. <br /> . ^Q..�pQ� -aOlD..9p � -�� �. .... . .. ..: .:: .: ::. <br /> �D <br /> ,� <br /> wldtf] �_ft 0,,.,.,,; .. o.o o .: o •:: <br /> <120mpi <10' Length�ft <br /> E. ROCK VOLUME >120mpi <5' <br /> 1. Multiply rock area by zock depth to get cubic feet of rock; �o sq. ft. x -10,� <br /> ft. = 3o cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> y 3o cu. ft. = 27 = _� cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight oE rock in tons;�cu. yd. x 1.4 <br /> ton/cu. yd. = a� tons. <br /> F. ABSORPTION WIDTH Absorption Width Slzing Table <br /> 1. Percolation rate in top 12 inches of soil is �,,.� mpi ����w,�;� c.,�� r�oorA� <br /> Minuta per Inch Soil Texnue pa dar per width to Roc1� <br /> Texture �.��f� LP��YY� (MPq squsre(oot Lay«wdth <br /> Fasicr chan 0,I Coarx Sand 1.20 I,00 <br /> 0.1�o S Saod 1�0 1.00 <br /> 2. Select allowable soil loading rate from table; o.��o s FM s� o.�o z.00 <br /> 6 to IS Saody L.oam 0.79 1.52 <br /> � 16 to)0 Loam 0.60 2.pp <br /> ,4� gpd 3i�o.s s�i��, oso a,ao <br /> , a6 co eo ci�y�.o.o, o.as z.e� <br /> 6ow�zo cuy o.�a s.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer s���,�,�zo cuY o.zo 6.00 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br /> 1.20 gpd/ft2+ �—�'gpd/ft� = a.��) <br /> 4. � Multiply adsorption width ratio by rock layer width to get <br /> required adsorprion width; <br /> �x /o ft = a�,� ft <br />