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MOUND DESIGN WORKSHEET <br />(For Flows up to 1200 gpd) <br />A. FLOW <br />Estimated L4 rJ gpd 3 'a—& <br />or measured x 1.5 a gpd. <br />B. SEPTIC TAMC LIQUID VOLUMES <br />a - / o 0 o gallons <br />C. SOILS (refer to site evaluation) <br />1. Depth to restricting layer • 3 ' (4 inches <br />2. Depth of percolation testa f a- inches <br />3. Percolation rate .Mo mpi <br />4. Land slope _. . c., <br />D. ROCK LAYER DINIF.NSIONS <br />1. Multiply flow rate by 0.83 to obtain required area of rock <br />layer: 0.83 = <br />x 50 gpd x 0.83 sq. ft./gpd = 3—`1 sq. ft. <br />2. Select width of rock layer (10 feet or less) _ �o <br />3. Length o4rock layer = area + width = <br />Io sq. ft. + /o ft. _ . ft. <br />:. <br />ft. <br />E.+1lmaled Seva1e Flo -s .n Gsllorts per day <br />(1pd) <br />umocr <br />Of <br />Type t <br />T pe 11 <br />Type 112 <br />r1Vpt <br />13odroonm <br />#- Nr AW -W <br />0 Ito 1 <br />std <br />2 <br />300 <br />227 <br />too <br />2.00 <br />3 <br />430 <br />200 <br />211 <br />ao� <br />1 <br />600 <br />277 <br />2.76 <br />r a. <br />•r.• <br />3 <br />730 <br />4" <br />291 <br />0 Nl <br />6 <br />900 <br />723 <br />232 <br />71010 <br />Clay <br />600 <br />270 <br />H <br />1200 <br />677 <br />101 <br />.�.... <br />Rork Bed <br />atr. war c....N. a PA-. <br />N.•r•r dM.a�a <br />Raasd <br />AStOrpN+a +•dN <br />to lock laver <br />u►dth <br />l+s.i mar -•a <br />S. <br />Cas—h <br />#- Nr AW -W <br />0 Ito 1 <br />std <br />1117 <br />too <br />01 to 7 •• <br />Fina Sand •• <br />060 <br />2.00 <br />6 b 13 <br />S«d7 Lowe <br />me <br />132 <br />16 I&A <br />LOS" <br />Rork Bed <br />�GrUw <br />Stnl iltaetlre <br />pt 'I-1 /o <br />o"m foot <br />Raasd <br />AStOrpN+a +•dN <br />to lock laver <br />u►dth <br />faalarYun 0 1 <br />Cow steel <br />,.,.,.,..•,•,•,., ,.,•,•,•,•,.,. <br />vidth 510 It. <br />0 Ito 1 <br />std <br />120 <br />too <br />01 to 7 •• <br />Fina Sand •• <br />E. ROCK VOLUME Lenst <br />1. Multiply rock area by rock dept.'s to get cubic feet of rock; <br />•} /U sq. ft. x ft. _ cu. ft. <br />2. Divide cu. ft. by 27 cu. ft. Icu. yd. to get cubic yards; <br />LjJQ_ cu. ft. -* 27 - J6, J- cu. yd. <br />3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br />j cu. yd. x 1.4 ton/cu. yd. _7 tons. r- <<,l9u <br />F. ADSORPTION WIDTH <br />1. Percolation rate in top 12 inches of soil is 3j.�- mpi <br />2. Seler'. allowable soil loading rate from table; <br />gpd/ftp <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/ft1+ ,'"0 gpd/fe - .)- 'Yc,, <br />4. btultiply adsorption width ratio by rock layer width to get <br />required adsorption width; <br />��,`{0 xft= ft <br />Nbv„ pflo. wt,:•a SWng Table <br />M'..0011 Aa• <br />1n �linulta <br />Iwcfl (MPI) <br />�GrUw <br />Stnl iltaetlre <br />pt 'I-1 /o <br />o"m foot <br />Raasd <br />AStOrpN+a +•dN <br />to lock laver <br />u►dth <br />faalarYun 0 1 <br />Cow steel <br />—. <br />-- <br />0 Ito 1 <br />std <br />120 <br />too <br />01 to 7 •• <br />Fina Sand •• <br />060 <br />2.00 <br />6 b 13 <br />S«d7 Lowe <br />0 79 <br />132 <br />16 I&A <br />LOS" <br />�1 ros7 = <br />S,b L. <br />V.%Lown <br />�sy <br />0 Nl <br />300 <br />/t0 to 1:0 <br />9 is <br />Slower thaw <br />Clay <br />— <br />- - <br />120. <br />• sa.l 100 cootie for 1nstallattow of a <br />uwdard /)aam. <br />See Tow 01 70 st,e' to 2 1e '6 <br />•• Se.l 1tar.n 30♦ - "Mm of fine ted <br />Pius .er7 rand. <br />••• S.,.1 too Ness for m1ukr%ta0n 04 t <br />eland vd ryl•ent. <br />see '060 0:10 Ubp 1 1. pale 1 T <br />