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E-19 <br /> MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) • <br /> 4/�(r'n��/e Spf,6 S <br /> 1 •-'I A, FLOW • D-7 <br /> estimated hr gpd (see pages D-7 or I-3,4, 5) ESTIMATED SEWAGE/Lows IN G.uI941 PEI DAY <br /> N Of TYPE Of RESIDENCE• <br /> or measured gpd. DE DROM6 I 11 a = <br /> 2 300 m 1e0 11011 <br /> 3 150 ]0O 21 .1 <br /> • Soo 375 25,6 "'"" <br /> B. SEPTIC TANK LIQUID VOLUMES 750 •� 33 T'". <br /> 7▪ 1050 " 1100 370 ' <br /> 1(C/n gallons (see pages C-3 or C-5) 11 _ 1200 o75 4011 E.w.".• <br /> C-3 <br /> C. SOILS (refer to site evaluation) 5EFT1C TANK CAPACITIES, IN GALLONS <br /> 1. Depth to restricting layer = 2,o�D C.•1OfT, <br /> 1� inches KAMPOF ,.•Mal -R11D....D2 <br /> .EDlY10H, WW2 CAP•GT7 DWG.&AL <br /> 2. Depth of percolation tests = \ 1). inches ,O.EIU T„ 7151 <br /> 3. Percolation rate 1 ` E mpi r:/ 5,9 f /no E 11�, ••68 /080 <br /> 4. Land slope c_8 % ... <br /> I <br /> 7,a,011, 110. 2210 78¢6 5000 <br /> D. ROCK LAYER DIMENSIONS <br /> 1. ' Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: A x 0.83 = , <br /> 6-,Oo gpd x 08a sq. ft./gpd = Vno sq. ft. <br /> 2. Select width of rock layer (10 feet or less) = 1 o ft. <br /> 3. Length of rock layer = area÷ width = <br /> t() sq. ft. + I O ft. = 1r O ft. Rock Bed <br /> (eD ',.....W..=7.7 <br /> i .•••••••••••••••••f•r•l•f•!•f•f•f•f <br /> 1•ti•ti•ti:::::; .ti.ti.ti.ti.ti.ti;::417idth S''"' <br /> l.f.f•1•l.t.t.t.1.1.1.�.J.l.t.t <br /> 1.f.I.f•f.r.f•l.I_f•j•f�f•r_r.f <br /> E. ROCK VOLUME I=-- Length ---i <br /> 1. Multiplyrock area by rock depth to get cubic feet of rock; I <br /> Ct sq. ft. x I ft. =lr•bC cu. ft. 1 <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> (.CC) cu. ft. y 27=, �• cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br /> a, ,),cu. yd. x 1.4 ton/cu. yd. _3 I .1 tons. <br /> F. ADSORPTION WIDTH <br /> 1. Percolation rate in top 12 inches of soil isl ,S mpi E-16 <br /> 2. Select allowable soil loading rate from table on page E-16; loru l2ilD•O RATER CO SOLI W401W40101UMOUNDS <br /> C)* 1 uwgpd/ft2 1.4W 4.8, l,1....•.....mod <br /> „•. <br /> 3. Calculate adsorption width ratio by dividing rock layer { <br /> 6.00 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; •.1 I 0� i.e.• S 1 1.04 <br /> 1.7• 1.T, 2.21 1.12 <br /> 1, 20 0.00 0.61 •21.44 2.00 <br /> II •l 0.10 020 2.00 2.•0 <br /> 1.20 gpd/ft2-!-C.).-1 el gpd/ft2 = I S . at 6 <br /> 0.- 0.46 0.72 1.10 2.51 <br /> •1 120 034 021 •-H Coo <br /> Check this value on page E-16. <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> 1 . 5 x 1t ft = I - ft <br />