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� � MOUND DESIGN WORKSHEET <br /> � (For Flows up to 1200 gpd) <br /> A. FLOW` � F.�was.�.�t�ci.uo�vae.r <br /> Estimated.�,�o gpd � ".�' ''yp°' �`�'P'° �'°°m '� <br /> or measured=x 1.5=___._gpd• °m` <br /> � <br /> B. SEPTIC TANK LIQUID VOLUME.S ' 6'`S0°° m. =as� � <br /> a � � �m �ymp� <br /> 2.—/(90 0 , g�0I13 , 7 1Q30 600 77'o 1fa <br /> . S 1 ' 1200 673 � m <br /> C. SOILS (refer to site evaluation) �� � u. � ! <br /> 1. Depth to restricting layer=.3=�nclles.__feet �� �� a,,q,_,,, ;,�,� <br /> 2. Depth of percolation tests� a�_inches '"�°°�' �'"'"' °'""°"""' """"°' <br /> 3. Texture.��-_�.�.Percolatior�rate�mpi 's`' � �m, ,� <br /> 4. Land slope=/a '.'"" 30°° '°°° � <br /> D. R :D . <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock layer.A x 0.83= <br /> .�_Spd x 0.83 sq. ft:/gpd =�,'L,�.sq. ft.+,o�n y,o� <br /> 2. Select width of rock layer(max 10' if<120 mpi max 5')_ /_�• <br /> 3. Length of rock layer�area+width= ` <br /> • �I1=sq. ft.+ /o ft•_�,.L_� . +�, . <br /> �dth -1=fc . . <br /> <120mpi <1�0'. �n�—�=fr <br /> >120mpi <5' <br /> E. ROQC VOLUME <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; �o sq. ft x •�� <br /> ft. =y�Sz cu. ft. <br /> 2. Divide cu. ft.by 27 cu. f�/cu.yd. to get cubic yards; <br /> y�.,cu.ft. +27=�_cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons;.,L1Q.cu•yd. x 1.4 <br /> ton/cu.yd. _.�tons. <br /> F. ABSORP'TION WIDTH "�'°°���"�' <br /> 1. Percolation arate in top 12 inches of soil is!�.� mpi ��� ��,� � �� <br /> TPaCt't1TE L L�K Lo q-w1_ 0� '�"�« �`r"� ' <br /> w�a�.a� ce.�.a..a �so i.00 <br /> ai a s �se.a �ado ?:oOOo <br /> 2. Select allowable soil loading rate from table; `„„ �,,,,,�,,, a,9 �.s: <br /> +� SPd/� � �i a.�0s s��'.o.� o.°�0so i,°�o <br /> �s a 60 d�6e.m au 2.a7 <br /> . • Slo�et�1!A CQ�r O.ZO 6.00 <br /> 3. Calculate adsorpt�on width ratio by dividing rock layer <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading nte; <br /> 1.20 gpd/fts+ .y s gpd/ft�_ . �..= <br /> 4. • Multiply adsorption width ratio by rock layer width to get <br /> requir�d.adsoirption width; <br /> �,L� x�ft= ��' ft <br />