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MOUND DESIGN WORKSHEET <br /> � (For F1ows up to 1200 gpd) <br /> , � <br /> A. FLOW E.tLnatee se«.te FloN in c.i�«,.pa�.r cBA� <br /> Estimated �Sv gpd N oree ,ty�t .q,��t �ryy���i �ry�rv <br /> or measured - x 1.5 = - gpd. �� <br /> s �oo us �eo a. <br /> 3 �so soo 2�s .� <br /> B. SF.PTIC TANK LIQUID VOLLTMES � s �600so iso � •� <br /> �,-I d o o gallons i ia900�o � a o � <br /> .�,. <br /> a �2ao a�s .as <br /> m� <br /> C. SOIiS(refer to site evaluation) <br /> N�be ►'.�o �� <br /> 1. Depth to restricting layer= 1 � � inches 'c �"� �~• <br /> s.e� � <br /> 2. Depth of peraolation tests = 1 a`� inches � <br /> 3. Perooladonrate t3•D mpi 2��:" i,o i's o <br /> 4. Land siope ►a % �«i � � <br /> �.s s..n�,c.a �:i s� <br /> D. ROCK LAYER DIlNIIVSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required. area of rock <br /> layer:A x 0.83 = <br /> y So . 8Pd x 0.83 sq.ft./gpd =��sq. ft-+,o�y�o <br /> 2. Select width of rock layer(10 feet or less) _ �� ft. <br /> 3. Length of rock layer= area+width= Roc1c Bed <br /> 4 l 0 sq. ft.+ �ft. _ � ft. ,.,.. . ,. .. .+,.,., <br /> ;f�,;�ti• �r�i�i •3 st}�': <br /> ��;:;3{+'�:�;.�'�.�x���rti�ti td th 510 f t. <br /> .�•r•�}?r•r• •i•� r r •r•! <br /> ��ti����r�+�f�=•M�����+�±r+ <br /> E. ROCK VOLUME �- �"�' �� <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> 41� sq.ft.x �,uS ft. _�cu. ft. <br /> 2. Divide cu.ft.by 27 cu.ft:/cu. yd. to get cubic yards; <br /> y�u cu,ft, t 27=_�cu. yd. <br /> 3. Multiply.cubic yards by 1.4 to get weight of rock in tons; <br /> �cu.yd.x 1.4 ton/cu. yd. _�tons. <br /> F. �►D�R�ON�D•� C.LPr L014-V✓1 an Wfdtl�Sl�n Lbk <br /> c.o.i. t...t <br /> 1. Percolation rate in top 12 inches of soil is �3•O mpi M�tl«�� ��1Texture �,� �,�: <br /> ceip* '.. .►.. .� <br /> 2. Select allowable soil loading rate from table; F,�:c�ci,�,o.i oane Sand 1.20 l.00 <br /> d/ft� 0.1 to 5 Sand 1.20 1.00 <br /> ,4� $p 0.1 to 5 Fine Sand" 0.60 2.00 <br /> 6 to 15 ndy Loam 0.79 1 S2 <br /> 3. Calculate adso tion width ratio b dividin rock la er tb ro 3o t,oam o.� 2•� <br /> � }r $ }' 31 to 45 Silt Loam O50 2.40 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; 61 e�o 21 0 �'�lay'a' ola s:oo <br /> 1.20 gpd/ft�+��gpd/ft�= a . �� . s�oW�r cn�n i2o c�a - - <br /> "Shc l+�vL+Q'.f0�ar man d fw ar v�fvx wnd <br /> 4. Multiply adsorpdon width rario by rock layer width to get <br /> • required adsorption width; <br /> ��x,�.p._ft=3�,� ft <br />