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'. MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> A. FLOW IstimatcJ Sewage Plows in Gallons f-Jay <br /> Estimated gpd (see pages D-7 or 1-3,4,5) (Arid) <br /> um her <br /> or measured -- d x 1.5 = - - or Type t Tyly a TYN III Type <br /> gpd 1lcdrmnia IV <br /> 2 300 225 180 <br /> B. SEPTIC TANK LIQUID VOLUMES 3 450 3M 219 a <br /> 4 (M 375 256 vtaue4 <br /> -j ono c) Pes allons (see pages C-3 or C-5) 5 750 450 294 <br /> g 6 900 525 312 It n 1• <br /> 7 1050 6(10 370 <br /> C. SOILS (refer to site evaluation) 9 1200 675 409 '�� <br /> 1. Depth to restricting layer = / r'i-o a. inches ticylk Tan4 Gp.chkt in aallw,% <br /> 4 <br /> th <br /> 2. Depth of percolation tests = i inches kViro r ss Mininmm t�yu,J l.i renes:r rismal <br /> Ikvlrrr,ms Cr,,aci �rl+rpe Ji. wl <br /> 3. Percolation rate <re, .cr m i 2orkss 750 1125P 3or4 1011 <br /> // �s� 4 nr 6 15(r) 22311 <br /> 4. Land slope fc� /eD % 7.M or q 2lsM) NKK) <br /> ever q ...•• <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: Daily Flow x 0.83 = , <br /> o o gpd x 0.83 sq. f t./gpd = t4t,, sq. f t.+)n'?o <br /> 2. Select width of rock layer (10 feet or less) _ _ /o ft. <br /> 3. Length of rock layer = Area Width = <br /> sq. ft. + ;o f t. = S ft. Rock Bed <br /> •' 1lridth s10 ft. <br /> E. ROCK VOLUME .'Length <br /> .• t <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> t <br /> ,LL2 sq. ft. x z:.EL ft. =,21 cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to bet cubic yards; <br /> -L,2u cu. ft. + 27= :.) cu. yd. <br /> 3. Multiply cubic yards by 1.4.to get weight of rock in tons; <br /> P. i cu. yd. x 1.4 ton/cu. yd. _ tons. <br /> I <br /> F. ADSORPTION WIDTH % L A-LN LO 0-1 <br /> 1. Percolation rate in top 12 inches of soil is mpi Ah."irPtion Width 5izior Table I <br /> PcrcolalionRaw Gallons 1ta10Or <br /> 2. Select allowable soil loading rate from table on page E-; in Minatts per Soil Texture lx r dny rer Abcorptlnn widdh I <br /> Ll 2 Inch(MF'i j square rUo1 to ILL•ek Layer <br /> s gpd/ft I <br /> 3. Calculate adsorption width ratio by dividing rock layer Fwue,Own 0.1•I OmmeSusul <br /> 0.1 to 5 smut 1.20 1.00 <br /> loading rate of 1.20 gpd/fF by allowable soil loading rate; 0.1 toy" i's- Sand*1 0.60 20) � <br /> 610 15 Sandy Loan 0.79 1.52 <br /> 1.20 gpd/ft2+ �i s'gpd/ft2= `� ��� I6 to 10 Loam 0.6.0 2.1x, ! <br /> 31 o41 Silt Loam 0.'0 2.40 <br /> Check this value on ape E-76. -461o60 clay Loatn 0.45 2.67 <br /> page 60 In 120 clay0.24 5.00 <br /> 4. Multiply adsorption width ratio by rock layer width to get SlowerIhan Clay ..... .-• I <br /> required adsorption width; <br /> -.� 'v).x to ft 2-L2 ft <br /> I <br />