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.^LJ <br /> � MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> A. FLOW D-7 <br /> Estimated u Sv gpd (see pages D-7 or I-3,4,5 ""'"'*"�'�"�M'��� <br /> ,..�d�,� <br /> or measured — gpd. .�. i n � a <br /> , � � �b .o. <br /> . «o � ��. ,,.;,, <br /> . .� „� m. <br /> B. SEPTIC TANK LIQUID VOLUMES : ,'o ;; ;; "�.; <br /> � �� .� � <br /> a –i o o � gallons (see pages C-3 or C-5) • �� m � � <br /> C-3 <br /> C. SOILS (refer to site evaluation) 6lITIC TAlNC CA/AdTlts, NI pAL1,ONt <br /> 1. Depth to restricting layer= �� -� 3 0" in es �••M« ••■• •�•°� <br /> �.. �,�.u.,�. .,..o..� <br /> 2. Depth of percolation tests = ' � � lIl ES �auM •�• �a� <br /> 3. Percolation rate .S • ti mpi ��� �«• ��•• <br /> �011� l�N �tt� <br /> 4. Land slope �. 0 9'0 <br /> �,.�. ,... .... <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required ea of rock <br /> layer: A x 0.83 = <br /> tiSo gpd x 0.83 sq. ft./gpd = 3'7_� s . ft.-t-►o`�0 4 I D <br /> 2. Select width of rock layer (10 feet or less) = o ft. <br /> 3. Length of rock layer = area+width= � <br /> �- � sq. ft.+ ��ft. = y L.ft. Rock Bed <br /> r•t•t f•f•r•r•f•r•r•r•t•t•t• <br /> � ti ti ti b•ti 'b•ti•5�•ti•1•ti•ti•ti•ti•ti <br /> I� r•r•f•r•�•1�f•r t•t•f•r•t.!•I <br /> ti.�•ti•�.ti•ti•ti•ti.ti•�.ti•ti•ti•ti•ti• dth S10ft <br /> r•I•r•r•r•r•r•! r•t•t•f•t•f•! <br /> ti•ti�ti�ti•ti•ti�ti�ti•ti•ti�ti•b�S�ti•ti• . <br /> .f.f.r.�.r.r.�.r.f.�.f.d./.f.r <br /> E. ROCK VOLUME �-- �.�+sw <br /> 1. Muldply rock area by rock depth to get iub c feet of rock; � <br /> �-110 sq. ft. x ,asft. _ �-!3a �tt. ft. <br /> 2. Divide cu. ft.by 27 cu. ft./cu. yd. to get cub' yards; <br /> y�Q cu. ft. +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. _�ton . <br /> F. ADSORPTION WIDTH <br /> 1. Percolation rate in top 12 inches of soil is� pi E-16 <br /> 2. Select allowable soil loading rate from table on age E-16; �.....u►«..M,.d«..�...�.�... <br /> �� BPd�f� �..' """"�.. IYUMW�M <br /> 3. Calculate adsorption width rado by dividing ro layer "�` '"" """ '""" `""`"'"' <br /> �'.�i •.1� t.1� 4� I.N <br /> loading rate of 1.20 gpd/ft2 by allowable soil lo ing rate; �� ... ..« �.N �.N ..M <br /> �� •�� �.M �.M t.N �.N <br /> 1.20 gpd/ft2+ .�y gpd/ft2 = /.s � •• ." •." •.,• ,» .." <br /> �1 .IN �.N �.M �.N �.M <br /> Check this value on page E-16. <br /> 4. Multiply adsorption width ratio by rock layer 'dth to get <br /> required adsorption width; <br /> �,Sa� x �v ft= IS.� ft <br />