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V--s-n� �y,- MOUND DESIGN WORKSHEET <br />ikPA4ACtt9i4 (For Flows up to 1200 gpd) <br />5N'S- k k <br />A. FLOW 113 r vo cv <br />Estimated :'pa) gpd (see pages D-7 or I-3, 4, 5) <br />or measured gpd x 1.5 = <br />B. SEPTIC TANK LIQUID VOLUMES <br />- ) p 'c) gallons (see pages C-3 or C-5) <br />C. SOILS (refer to site evaluation) <br />1. Depth to restricting layer = inches <br />2. Depth of percolation tests = inches <br />3. Percolation rate Io . L. lnpi <br />4. Land slope % <br />Sew%eIImnlwGanons per day <br />(gpd) <br />Numlxx <br />0f <br />Type 1 <br />Type 11 <br />Type III <br />Tyy�� <br />Bedroom• <br />IV <br />2 <br />300 <br />2/5 <br />190 <br />3 <br />450 <br />300 <br />218 <br />600 <br />375 <br />256 <br />140% <br />5 <br />750 <br />ISO <br />296 <br />.rae <br />y <br />6 <br />900 <br />52S <br />332 <br />T•L <br />7 <br />1 <br />1050 <br />1200 <br />600 <br />675 <br />370 <br />601 <br />Ili <br />.r1.. <br />$Wit To.► C.p-kim 1. pare <br />N'4"ur <br />c.l.wey..e► <br />C.P :ay <br />erEye J6po.A <br />71p <br />I I?s <br />3r <br />131D <br />uIS01o0 <br />2Up <br />No) <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 />2,0 n gpd x 0.83 sq. ft./gpd = :%Ll e7 sq. f t. ' r <br />2. Select width of rock layer (10 feet or less) = ft. <br />3. Length of rock layer = Area + Width = <br />n_ sq. ft. + L_ ft. _ ft. <br />E. ROCK VOLUME <br />I. Multiply rock area by rock depth to get cubic feet of rock; <br />a73 sq. ft. x j. o r ft. _ .,q6 cu. ft. <br />2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br />AjJ¢cu. ft. + 27 = I_ cu. yd. <br />3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br />, i cue yd. x 1.4 ton/cu. yd. = J,5' tons. <br />F. ADSORPTION WIDTH 1,04M <br />1. Percolation rate in top 12 inches of soil is ' ., . L• mpi <br />2. Select allowable soil loading rate from table on page E-; <br />gpd/f t2 <br />3. Calculate adsorption width ratio by dividing rock layer <br />loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br />1.20 gpd/ft2 + -4gpd/ft1I= -D � l,Q . <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 />-2,61x-41L-ft= 21.'2 ft <br />Rock Bed <br />�tii� 1n S10IL <br />Abm plfon Wldth SWng TAk <br />titeelMnRM <br />M M4Mo_ n per <br />lack Ir <br />Sell 7ixam <br />Qellme <br />Per dqr pr <br />gewAet <br />Rt"Of <br />AoeetI - w" <br />bRw l+pe <br />Feeeer "a 0.1 <br />Ceeeee S=d <br />- <br />-.- <br />W r S <br />:ar <br />Lb <br />I.00 <br />0.1 to S •• <br />No Sub •• <br />0.60 <br />2" <br />61013 <br />0.79 <br />132 <br />16:30 <br />Lew <br />010 <br />2.00 <br />31 10 45 <br />Sik Loew <br />0.50 <br />t40 <br />.61060 <br />CIE LOW <br />0.45 <br />2A7 <br />60 to 120 <br />` <br />034 <br />3JI0 <br />Slower dl <br />any <br />- <br />- <br />120" <br />