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MOUND DESIGN WORKSHEET <br /> � � � (For Flows up to 1200 gpd) <br /> A. FLOW ��a s�.t.���,c,��a� <br /> Esti.mated �'` gpd "�°°' �°' �°a �`° � <br /> or measured.=x 1.5 ==gpd. <br /> s �oo us iao � <br /> 4 600 3�75 2� nh <br /> B. SEPTIC TANK LIQUID VOLUMES s �� ��, � <br /> gallons a sco s2s m � <br /> � � ) J.�`� �' ��!C'-�� � . � �Q� � � r <br /> , � I �� Q�S � Q <br /> , I CdV <br /> C. SOILS (refer to site evaluation) <br /> 1. Depth to restricting layez������`��_�,,=,inches feet ��+ <br /> �.�r �...uw uw ar�,-*� -+b�..�,� <br /> 2, Depth of pezcolation tests = �=in�� ''`" `"'°'' `'"'""'"' ""w <br /> 3. Texture ��=r=; ��� ` Percolation zate i g�.mpi '�:' �« �� � <br /> 4. Land slope � % ,'�", '�' "� � <br /> D. R K LAYER,D I <br /> 1. Multiply flow rate by 0.83 to obtain z�equired area of rock layer. A x 0.83 = <br /> �✓` <br /> gpd x 0.83 sq. ft./gpd = ^��_�,'� sq. ft. <br /> 2. Select width of rock layer (max �.0' if <120 mpi max 5') _ �� ft. <br /> 3. Length of rock layer � area +width= � � .. .�.� <br /> ""` • "' r <br /> .�,�,� , <br /> • �' _, � gq. ft. + =__�• — � � - f�. ��, .. ,��,b�p. , <br /> � Width ��� � ft � . <br /> <120mpi <10' �n�—�--fr <br /> >120mpi c5' <br /> E. R4CK VOLUME <br /> 1. Multiply rock area by rock depth to get cubic feet of rock;'�y� sq. ft x�'-- ` <br /> ft. = �`���� cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> ��� cu. ft. +27= c=1_cu. yd. <br /> 3. Multiply cubic yaxds by 1.4 to get weight of rock in tons; �`;� cu. yd. x 1.4 <br /> ton/cu. yd. _ �' ' tons. <br /> F. ABSOR�''I'ION WTDTH Maorpdoa VYldtn SFzin�'hbl� <br /> 7,, Percolation rate in top 12 inches of soil is IS•S mpi r.�a�ea.i�.a� o.u� ��,,�. <br /> Mi�perlsd� ShcTacen �e pa ��� <br /> Textvse � �-��� �-o��� �, � r� r <br /> r..r.m.,a� c,o.n.s.ee �Zo �.00 <br /> 0.l p! i�od 120 1.00 <br /> .2, Select allowable soilloadino rate from table; a�p s �,a� o.�o ioo <br /> O 1 a l3 S�eey L�n+ 0.79 1.32 <br /> i ' 16 a 30 Lo�m 0.64 i00 <br /> , -� ; gpd/f� :�b�o C�1'ry�� o� z� <br /> • ' 60 w 120 C1+7 0.24 5.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer I �'°""°r`'�° I `a''' I °�' I °`" <br /> loading rate o£ 1.20 gpd/ft2 by allowable soil loading rate; <br /> 1.ZO,gpd/f���'_gpd/:�_ . �� .�,. � <br /> 4. � Multiply adsozption width ratio by rock l.ayer width to get <br /> zequired adsorption width; <br /> �.u;, x ;,-, ft = :�� �� ft <br /> = <br />