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• <br /> • " ' MOUND DESIGN WORKSHEET • <br /> • <br /> (For Flows up to 1200 gpd) <br /> A. FLOW Estimated Sewage Plows M Game per day <br /> Estimated 6.o o gpd(see pages D-7 or I-3,4,5) ,,fent <br /> or measured .._. gpd x 1.5= of . 1),pe 1 ,ypa 11 Type III1 . <br /> Bedroom <br /> 2 300 22S 1110 �V <br /> B. SEPTIC TANK LIQUID VOLUMES 3 430 300 216 `e1 <br /> 4 600 373 256 ht� <br /> -IQ o o gallons (see pages C-3 or C-5) 56 9 0 43300 2 4 Is <br /> R <br /> 7 1050 C. SOILS(refer to site evaluation) • 6 1200 600674 4a „Lr. <br /> 1. Depth to restricting layer x14"-fo ��t' inches '''"e"'`C''"k'"'`paves <br /> elty <br /> 2. Depth of percolation tests = ►a" inches w«� Minimum <br /> Lliold Liquid <br /> rimes I <br /> 3. Percolation rate mpi 2;eba ;30 113 <br /> 4. Land slope 9'07 �, ;� u o <br /> wtor <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: Daily Flowx 0.83= <br /> Ivo gpd x 0.83 sq.ft./gpd = 49V sq. ft.+lo°54 =Stir) <br /> 2. Select width of rock layer(10 feet or less) = / o ft. <br /> 3. Length of rock layer= Area+Width = <br /> s'Lt i sq. ft.+ / o ft. = S,s' ft. Rock Bed <br /> r• •r r•r•ra r.t.r•r•r <br /> 1 5 5 1•;1•1.1•�=�•1 05. <br /> �}r•!•r t}•r•!•r r•r•t! r•! <br /> . 1•;•1.1•;••1.1.1.1.1.1•;•;•1• dth S10 tt <br /> t•t•l•t•t.t• •t•r s'•t•!•!•t•1 <br /> E. ROCK VOLUME • 5.yr 1.1.1..;.•tAy...1.1.1. 1 <br /> •H t•t. • r• .i•r.t.t•t <br /> E- Length <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> 541 sq. ft. x/.vs-ft. =S'y cu. ft. <br /> 2. Divide cu. ft.by 27 cu. ft./cu. yd. to get cubic yards; <br /> ,5.2_y_cu. ft. +27= a t cu.yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; • <br /> _a_i cu.yd.x 1.4 ton/cu. yd. = ay tons. <br /> • <br /> F. ADSORPTION WIDTH GUN L-04-"1 <br /> 1. Percolation rate in top 12 inches of soil is to.i.. mpi Abborphon Width Sizing Thbk <br /> hroolnba Rate Ratio of <br /> 2. Select allowable soil loading rate from table on page E-; 1 loch r. Son m sp24,1.1:7.,rbbso' Layerh <br /> �+ gpd/ft2 uare Width <br /> 3. calculate adsorption width ratio by dividing rock layer .. p• than 0.1• Corr..Sand1.. . <br /> loading rate of 1.20gpd/ft2byloading01:o.l b s sawn 1.60 2.00 <br /> allowable soil rate; s•• P4tes.tte•• 0.60 .2.00 <br /> 11.20 gpd/ft2+ .y� gpd/ft2= 2 . 7 16so3 sat____m 0.60 2.00 <br /> 16 b 30 _Lott 0.60 2.00 <br /> 31 so Is slk Loam 0.30 2.40 <br /> Check this value on page E-1 b. 46:10 chgr ff m o 2.67 <br /> 4. Multiply adsorption width ratio by rock layer width to get slziptin Cl ---- --- <br /> required adsorption width; - <br /> z•V? x 10 ft= 2lo.7ft • <br />