Laserfiche WebLink
MOUND DESIGN WORKSHEET <br />(For Flows up to 1200 gpd) <br />A. FLOW <br />Estimated �<: gpd (see pages D-7 or I-3, 4, 5) <br />or measured - gpd x 1.5 = <br />B. SEPTIC TANK LIQUID VOLUMES <br />I -) ) -t i - / o gallons (see pagrj- C-3 or C-3) <br />C. SOILS (refer to site evaluation) <br />1. Depth to restricting layer = -2 -t Ly ' inches <br />2. Depth of percolation tests = 1 a ' inches <br />3. Percolation rate `J- 1 mpi <br />4. Land slope -- % <br />Estimatcd Sewage Flows in Galluns pa day <br />(Spd ) <br />er <br />Number <br />Its" of <br />Akwpim wW* <br />0 t3� IL"- <br />fww. *. 0.l 0 <br />comp Sad <br />--- <br />G( <br />Type 1 <br />Tyle H <br />Typc 111 <br />1AO <br />1lcdra.Kns <br />r'=Sud es <br />0.60 <br />7.00 <br />I V <br />2 <br />300 <br />225 <br />I80 <br />t4a1s1 <br />3 <br />450 <br />300 <br />218 <br />40. <br />4 <br />600 <br />375 <br />256 <br />267 <br />5 <br />-50 <br />450 <br />293 <br />31oww wn <br />6 <br />900 <br />525 <br />332 <br />Tim. <br />7 <br />8 <br />1050 <br />1200 <br />600 <br />675 <br />370 <br />408 <br />m <br />%Wk T..1, C.p. e[6-% I" a.M- <br />.1-b . a <br />Sd-M t,q-: <br />l.p.J C.paay r.6h <br />O.&-na <br />C.p.c,cy <br />W s•M 4uPra1 <br />2 a. ka <br />730 <br />1115 <br />3 w 4 <br />1010 <br />1500 <br />4=6 <br />1SID <br />2230 <br />7, A ar <br />,OTD <br />3101! <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 />'Sy gpd x 0.83 sq. ft./gpd = ak sq. ft-t)o)o 6v,4 ' <br />2. Select width of rock layer (10 feet or less) _ /o ft. <br />3. Length of rock layer = Area + Width = <br />-y_ sq. ft. + _ z ft. = (.-y ft. <br />E. ROCK VOLUME <br />1. Multiply rock area by rock depth to get cubic feet of rock; <br />k5L&�. sq. ft. x Lo e' ft. = aid cu. ft. <br />2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br />� i -el cu. ft. + 27 = �; 0_ cu. yd. <br />3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br />cu. yd. x 1.4 ton/cu. yd. _ tons. <br />F. ADSORPTION WIDTH 4 -L-A `{ tiro A w'% <br />1. Percolation rate in top 12 inches of soil is s,+. I mpi <br />2. Select allowable soil loading rate from table on page E-; <br />Ll <' gpd/ft2 <br />3. Calculate adsorption width ratio by dividing rock layer <br />loading rate of 1.20 gpd/ft' by allowable soil loading rate; <br />1.20 gpd/ft2 + tj S 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 />2.(.') x 1_ ft = ? ft <br />Rock Bed <br />0 <br />sloft. <br />�hlririih , , s �i• <br />I Le"g1h <br />Absorpfhm VAdlb SWn=7ibk <br />Fsnotaslml Itme <br />io h wwmSoil <br />Ind 18 r ps <br />rearm <br />Galton. <br />per dey p w <br />14 m f= <br />Its" of <br />Akwpim wW* <br />0 t3� IL"- <br />fww. *. 0.l 0 <br />comp Sad <br />--- <br />_ <br />0.105 <br />Smd <br />1.70 i <br />1AO <br />0.110509 <br />r'=Sud es <br />0.60 <br />7.00 <br />6015&79 <br />Std) lots <br />132 <br />16 b 30 <br />t4a1s1 <br />0.60 <br />2.00 <br />31 a 45 <br />sat Lata <br />0. <br />2.40 <br />267 <br />to <br />31oww wn <br />Clay <br />_ <br />- <br />120aaa <br />