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- MOUND DESIGN WORKSHEET 5 <br /> � � (For Flows up to 1200 gpd) <br /> A. �,�W Fstimated Sewage Flows in Gallons per day <br /> d) <br /> Estimated C� gpd N of« T�r Tra Q rra m T� <br /> or measured x 1.5 = gpd. <br /> 2 3ao a�s ►so �, <br /> B. SEPTIC TANK LIQUID VOLUMES a 6 0 3°s° i's6 °f'"� <br /> �� <br /> ,:1�"� gallons 6 '90500 'su �s` T,�,. <br /> � ioso 60o s�o u« <br /> 8 IZ00 675 408 � <br /> C. SOILS(refer to site evaluation) `°''°"'� <br /> 1. De th to restrictin la er= inches ��� feet �` �� �` <br /> P g Y ..� ' �� ►���,y <br /> Nwiier of Minimum liyuid lxryid a�Ciry wiN wiN disposal� <br /> 2. Depth of percolation tests= /2 inches �^� ��Y �a�y Lh»� <br /> 3. Texture ,L v�� 2'x'"' ,� „u ,s°° <br /> Percolation rate��_mpi �,K< �000 ,sao 2oou <br /> s�K� i sao zuo woo <br /> 4. Land slope�_% �.R,��y Z� 3� � <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 /> �oo gpd x 0.83 sq. ft./gpd =�Soo sq. ft. <br /> 2. Select width of rock layer (max 10' if<120 mpi max 5') _ /o ft. <br /> 3. Length of rock layer =area=width = •���.�•tr-�a�•. .�:a � b.:e.Qa e <br /> A' '.q PC A'�'fi 60 �D�.. <br /> 0o sq. ft. = /v ft. - �o ft. �"'�Aegn�b��t'�e� Q: - ^ <br /> QQQ�Odb,�ti6Y A' .t�A�b <br /> .. <br /> �o{. w.4o'? 'qD'a.O4G�SG I� �.:: �'� ..._ !:_. ,. '..�. , ,' <br /> Y: <br /> wld�i �d it 40",; e.�>o.a..aon. n •:o.a .e ;ea�. <br /> <120mpi <10' Length S�"d it <br /> E. ROCK VOLUME <br /> >120mpi <5' <br /> 1. Multiply rock area by rock depth to get cubic feet of rock;Sdosq. ft. x� <br /> ft. _��cu. ft. <br /> 2. Divide cu. ft.by 27 cu. ft./cu. yd. to get cubic yards; <br /> cS'oo cu. ft. =27= l�.�cu.yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons;/�.b cu. yd. x 1.4 <br /> ton/cu. yd. _�tons. <br /> F. ABSORPTION WIDTH Absorption Widt6 Sizing Table <br /> 1. Percolation rate in top 12 inches of soil is�.mpi ���� c�,� x�o�r,�� <br /> Texture .�,�-�a.-� *�����I� Sal Texum p«a�y� �;am�a R«r <br /> (�4Pq squa�e foot layer Width <br /> Fasoer than 0.1 Coarse Sand 1.20 1.00 <br /> 0.1 W 5 Saod 1.20 l.00 <br /> 2. Select allowable soil loading rate from table; o.,�s F�s� o.�o z.00 <br /> � �d/� 6to15 SandyLoam 0.79 1.52 <br /> 00 <br /> 31 ro45 Siltl.oam OSo 2.40 <br /> 46 to 60 C7ay l.oam 0.45 2.67 <br /> 60 to 120 Ctay 0.24 5.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer s�o„����zo c,ay o�0 6.00 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br /> 1.20gpd/ft�=��gpd/ft2= Z.c�o <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> �_XJs2�=�ft <br />