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MOUND DESIGN WORKSHEET <br />(For Flows up to 1200 gpd) <br />A. FLOW <br />Estimated H S gpd (see pages D-7 or I-3, 4, 5) <br />or measured gpd x 1.5 = - <br />B. SEP'I IC TANK LIQUID VOLUMES <br />-1 D 0 gallons (seepages 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 mpi <br />4. Land slope _96 <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 />Li SL) gpd x 0.83 sq. ft./gpd = sq. ft. - <br />2. Select width of rock layer (10 feet or less) = ft. <br />3. Length of rock layer = Area + Width = <br />u i o sq. ft. + /p ft. = '-i I ft. <br />E. ROCK VOLUME <br />1. Multiply rock area by rock depth to get cubic feet of rock; <br />o sq. ft. x 1-� ft. = a- o cu. ft. <br />2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br />t4 �o cu. ft. + 27 = / c-. cu. yd. <br />3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br />IL- cu. yd. x 1.4 ton/cu. yd. = , z D tons. <br />F. ADSORPTION WIDTH <br />I. Percolation rate in top 12 inches of soil is `--i•rl mpi <br />2. Select allowable soil loading rate from table on page E-; <br />• y j 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 />1.20gpd/ft2+ - gpd/ ft2= - <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 />-�•�� x )C, ft = ft <br />Eainsaed Sewage Pbrs is Caput per day <br />(Bpi) <br />0( <br />Type I <br />Type II <br />Type III <br />nedroolas <br />1 V <br />2 <br />300 <br />223 <br />ISO <br />3 <br />450 <br />300 <br />218 <br />a <br />6W <br />375 <br />256 <br />5 <br />750 <br />450 <br />294 <br />.rw. <br />a <br />6 <br />900 <br />525 <br />332 <br />L <br />7 <br />1 <br />1050 <br />1200 <br />600 <br />675 <br />370 <br />408 <br />ai <br />cd� <br />Vrrw d <br />Miwa= U"W <br />Lfpia cw�'ry rys <br />� <br />�+r+y <br />4 <br />. Ay�d <br />2 s Im <br />730 <br />Ills <br />)art <br />10p0 <br />I300 <br />a of 6 <br />IND <br />2M <br />7, / w 1 <br />XK* <br />x000 <br />aar 9 <br />- <br />Ablorpifoa WWII Sizing Ubk <br />hecolelleallaee <br />is Milwwa pr <br />Inell lM►q <br />Soil Team <br />Galion <br />pa day per <br />wpm fool <br />salioof <br />AMmpsioa widdl <br />to Rod Layer <br />wiedl <br />Fa.Mf dna 0.1 <br />caw Saar <br />• •-- <br />--- <br />0.1605 <br />Sad <br />1.20 <br />1.00 <br />0.10500 <br />Fina Sad •• <br />0.60 <br />2M <br />610 15 <br />Sanoam L <br />0.79 <br />132 <br />I6 a 30 <br />I Dam <br />0.60 <br />2.00 <br />311045 <br />3111 Loam <br />050 <br />2.40 <br />46lo 60 <br />Loam <br />0.45 <br />2.67 <br />60 a 12U <br />0.24 <br />5.00 <br />Slower Iran <br />clay <br />._.. <br />---.. <br />120"• <br />