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MOUND DESIGN WORKSHEET " :� 3711 �JZZVp-� RCP <br /> (For Flows up to 1200 gpd) OA /W 61 <br /> A. Ow Fes,T..c�Scr.Y:Fi...'s of rj"_w 1,ct S.y <br /> Estimated y-52 gpd / N,== -T1Ycj 7ywti T)yc W Ti�, <br /> or measured x 1.5 = gpd. i <br /> B. SEPTIC TANK LIQUID VOLUMES �g y <br /> gallons �� ' 025 ,2 <br /> 6 bW 32S �3= i Ts1F c. <br /> u � <br /> i t�J I 075 4c" i w <br /> C. SOILS (refer to site evaluation) <br /> 1. Depth to restricting layer= a inches feet <br /> 2. Depth of percolation tests = /Z- inches <br /> 3. Texture C Percolation rate -3&- `f mpi 2""" , <br /> 4. Land slope 1 q•0 % U A.%- q(o - (Q T.:"r <br /> J <br /> D. ROCK L.AYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock layer. A x 0.83- Z <br /> 14 lo gpd x 0.53 sq. ft./gpd = 394 sq. ft.-., to °=q1 C <br /> 2. Select width of rock layer (max 10' if<120 mpi max 5') _ /0 ft. <br /> ;. Length of rock layer = area width= gyp• �- --.-• _.___.. <br /> 44—sq. ft. - _/6 ft. ft. <br /> Q�°oOp C�000a�. sD r0 .D lavCv.^r"."R <br /> Width Al ft z"=" <br /> <120mpi <10' Length 'Y/ ft <br /> E. ROCK VOLUME >120mpi <5' <br /> 1. Multiply rock area by rock depth to get cubic feet of rock;4110 sq. ft. x <br /> ):o ft. = 410 cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> tLI.0—cu. ft. 27 =o cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; cu. yd. x i.-I <br /> ton/cu. yd. =Z 3 tons.- 10 al <br /> u <br /> F. ABSORPTION WIDTH A wurpuuu WW bwu j T-+ <br /> 1. Percolation rate in top 12 inches <br /> //of soil is 38•x/ mpi ��1�R."W c..,. <br /> '7t0—�DC+ Maw%aa P"loch SW T"", Pc+a.,r s� •.ui w h :a <br /> Texture C M p R^^^�� 1MY1, 6%—.:W" <br /> Fawcr Yua 0.1 coame S.,4 l._] 1 W <br /> 0.1 w s Sid 1_o W I <br /> 2. Select allowable soil loading rate from table; a1 is s.Fac l J : � i s' <br /> ggpd/ftp 16 W 30 L & 00 2 w <br /> a1 IQ 41 s. - <br /> +e w w <br /> 3. Calculate adsorption width ratio by dividing rock layer slara0..a 1ao clay <br /> - loading rate of 1.20 gpd/ft2 by allowable soil loading rate; i <br /> 1.20 gpd/ft==0,y3gpd/ft== <br /> 4. Aluldply adsorption width ratio by rock layer width to get i <br /> required adsorption width; <br /> 7 x /0 ft =..-a7 ft <br />