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• � ' ' ' � � MOUND DESIGN WORKSHEET <br /> ' (For Flows up t�1200 gpd) <br /> A. FLOW , - . . �a se�t��cAn�va�r <br /> a <br /> Estimated (�ov gpd " rr� �,y�, ,y�a �m '�` <br /> or measured x 1.5= gpd. <br /> 2 �oo m iao � <br /> B. SEPTIC TANK LIQUID VOLUMES a 64300o n is� � <br /> a v o o gallons . 6 9�00o As ra m <br /> 7 1060 600 3'TO T�� <br /> ; 8 � 1I00 673 d08 m <br /> C. SOILS(refer to site evaluation) � ' °°''�°` <br /> 1. Depth to restricting layer= �8 inches � s� � <br /> 2. Depth of percolatian fiests= �.a. �� �d ,��. �.�. .��:`°� <br /> wn�. c�a �w�ww w�rr�. <br /> 3. Texture ��,�-� Percolation rate 9 mpi =�` � �� '�° <br /> 4. Land slope �� � %, �s:�y � � •'� <br /> �g� � <br /> D. ROCK LAYER D <br /> ; � <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock layer:A x 0.83= <br /> bov gpd x 0.83 sq. ft./gpd=�sq.ft. <br /> 2 Select width of rpck la�er(maz 10'if<120 mpi nnax 5')= i � ft <br /> 3. Length of rock layer=ar�+width= �• � �, <br /> so v sq. f�+ �_ft._ -� ft. <br /> _ Width'�ft �� � . <br /> <120mpi<10' �n� s� ft <br /> E. ROQC VOLUME <br /> >120n�i<5' <br /> 1. Multiply rock area by rock depth to g�et cubic feeett of.rock; �� sq.ft. x �,or <br /> � _ ft. _ �'cu.ft. <br /> 2. Divide cu.ft.by 27 cu.fk/cu.yd.to g�et cubic yards; <br /> .�s �,ft, +27= i�.� cu.yd. <br /> 3. Multiply cubic yards by l.4 to get weight of rock in trn�s; ���Y cu.yd.x 1.4 <br /> to�/cu.yd= �.��bons. <br /> F. ABSORPT'ION WIDTH _ �r�p�vr�s�� <br /> 1. Percolation rate in bop 12 inches of�soil is ' 9 mpi �wroa�.�.�. c��.. w��r,,�. <br /> T@X�llle �"�'�'"� 11f�1m__psYeY aoil7bm�s ptdyroor ��� <br /> � �A �qars foot <br /> � Fnnr1M�QI Gors�Srd I.m I.00 <br /> � <br /> . '� � `Q11po3 � 0.60 2.00 <br /> 2. Select allOWable soil loa rafie from`table; <br /> � .., j . 6 w Is s�dy Lo�. a79 �.32 <br /> �� or�/� .m . 3 1�a�S S i l t[.a s 0 3 0 2 r 0 <br /> � . . � •"""`b �, �6 a 60 Clpr Lae a43 267 <br /> 60a 120 Clpr O.1A 5.00 <br /> 3. Calculate adso tic�width ratio b ':di ' rocic]a �•�►�r�.�=o a� o.�0 6.ao <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br /> � � �1.20 gpd/ft�+`�c�gpd/ftz= . a <br /> 4. Multiply adsorpti�width iatio by rock layer.width bo g�et <br /> required adsorption width; <br /> �_x_�'�_..�_�t <br />