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MOUND DESIGN WORKSHEET <br />(For Flows up to 1200 gpd) <br />A. FLOW <br />Estimated 6 v o gpd <br />or measured x 1.5 = gpd. <br />B. SEPTIC TANK LIQUID VOLUMES <br />OAS Y2 SQ gallons 4 6a6 /,00 ,0 61GZ o,✓ <br />f o�/E /000 6A�ta✓ /tIM/ivG Tifl/k. <br />C. SOILS (refer to site evaluation) <br />1. Depth to restricting layer = -/ inches <br />2 Depth of percolation tests = /S inches <br />3. Percolation rate S. 3 mpi <br />4. Land slope 41 90 <br />Eohad Some RM ill G4M= vw Day (SP4 <br />�.,r <br />r p.. <br />2.r br <br />750 <br />sonbw <br />of <br />TM 1 <br />Typo a lyes m <br />Type 1v <br />2 <br />300 <br />225 180 <br />Goa <br />3 <br />630 <br />300 218 <br />of <br />4 <br />s <br />600 <br />730 <br />375 2S6 <br />4S0 294 <br />•''" <br />6 <br />7 <br />900 <br />1050 <br />325 332 <br />600 370 <br />.�.r <br />r„=„ <br />8 <br />1 1200 <br />675 M <br />Nwa6rof <br />�.,r <br />r p.. <br />2.r br <br />750 <br />1.126 <br />3RI <br />IAW <br />1.500 <br />S W 6 <br />1300 <br />2330 <br />7w$ <br />2= <br />low <br />@V W 9 <br />Sin a& C-6 <br />(z 13) <br />D. ROCK LAYER DDdENSIONS <br />1. Multiply flow rate by 0.83 to obtain required area of rock <br />layer: A x 0.83 = _ <br />6 �o gpd x 0.83 sq. ft./gpd = soo sq. ft. <br />2. Select width of rock layer (10 feet or less) _ /0 ft. <br />3. Length of rock layer = area + width = Rock Bed <br />SDD sq. ft. + /V_ ft. = -T-0 ft. <br />;��i%`%•. <br />.iieh 510 ft. <br />=i?3`iTi •i.•.•?i� <br />E. ROCK VOLUME <br />1. Multiply rock area by rock depth to get cubic feet of rock; <br />SDo sq. ft. x / ft. _ 5W cu. ft. <br />2. Divide cu. ft: by 27 cu. 't./cu. yd. to get cubic yards; <br />Seo cu. ft. + 27 - 12,15 cu. yd. <br />3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br />/ .S cu. yd. x 1.4 ton/cu. yd. - 2 6 tons. <br />F. ADSORPTION WIDTH <br />1. Percolation rate in top 12 inches of soil is _ .� mpi <br />2. Select allowable soil loading rate from table; <br />us6 0.6o gpd/fe <br />3. Cali1date adsorption width ratio by dividing rock layer <br />loading rate of 1.20 gpd/ft2 by allowable scu loading rate; <br />1.20 gpd/ft=+ . CO gpd/ft2 = 2.0 <br />4. Multiply adsorption width ratio by rock layer width to get <br />required adso tion width; <br />• <br />0 <br />x (�, �t = 2 <br />�� ft <br />AWWPGWWW1k29ftUb <br />r p.. <br />Soil Twum <br />app+► <br />Faster than 0.1 <br />Comm Sand <br />120 <br />1.00 <br />0.1 to 5 <br />Sand <br />1,20 <br />0.1 to 5 <br />Fine Sand- <br />0.60 <br />2.00 <br />6 to 15 <br />5and.52Ly Loans <br />0.79 <br />1 <br />16 to 30 <br />Loath <br />31 to 45 <br />Silt Loath <br />0.500.45 <br />240 <br />46 to 60 <br />Cly Loam <br />2.40 <br />61 t0120 <br />Clay <br />024 <br />5.00 <br />Slower than 120 <br />Clay <br />- <br />"fa0 Irvf� SOAR � Www d do � rl�r ati awl <br />