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Jan 06 98 10: 09a Windsor Companies Corp. 482-0607 p. 5 <br /> MOUND DESIGN WORKSHEET '-1-1 -3 17-- 1--t' _ <br /> (For Flows up to 1200 gpd) <br /> A. FLOW <br /> Estimated Sewage Flow in Cunene per Dar(rd) I <br /> Estimated 900 gpd Nuneer <br /> or measured _ x 1.5 = - gpd. of 7Yve I 7 pe u I Tyre M "rpre IV <br /> 2 303 225 180 WS <br /> B. SEPTIC TANK LIQUID VOLUMES s aio ` 218 <br /> 1-1?SO41-IoVO gallons 6750 29+ <br /> 6 900 525 332 vs <br /> 1050 62 1200 605 408 <br /> C. SOILS(refer to site evaluation) _ <br /> 1. Depth to restricting layer= as` -'o 3y'' inches Number `�.*" ..• <br /> 2. Depth of percolation tests = 1. inches B r" <br /> 3. Percolation rate -s -7 mpi c 1.--47*Vri 2 e<Om4 750LOCO 1.1.25.500 <br /> 4. Land slope % s or 6 1_50021 tso <br /> or <br /> �.= 2.000 3.000 <br /> over 9 Sea fig.C-6 (Ili) <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer.A x 0.83= <br /> `400 . gpd x 0.83 sq. ft./gpd= 14- sq. ft. <br /> 2. Select width of rock layer(10 feet or less) = 1 o ft. <br /> 3. Length of rock layer so area+width= Rock Bed <br /> r)11 r) sq.ft.+ _12_.ft = ')S ft. x.1n.,..K ...�......... <br /> r+ yam' ti <br /> VN♦♦ � 1�1�I�i.a�J <br /> ''Y .1yyr♦ ♦��a�Vy Y <br /> " rr;.+`�.:;:,a-`}}y.�1.tG� .th 510 ft. <br /> ' a i r Lt..�'Z� <br /> E. ROCK VOLUME 1 Length <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; -- <br /> 04-) sq.ft.x 40 S ft. _ 'NY cu. ft. <br /> 2. Divide cu.ft.by 27 cu.ft./cu. yd. to get cubic yards; <br /> li cu.ft. +27= a,(27 cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br /> aS cu. yd.x 1.4 ton/cu.yd. = 40 tons. <br /> 1 <br /> F. ADSORPTION WIDTH L )-f > W/ <br /> Abscepti1. Percolation rate in top 12 inches of soil is 3-'7 mpi ratio, �Wed� LRao Cato. ' i.e.., <br /> Minim!per tr,d, Soil Texture ,z-� <br /> � w <br /> 2. Select allowable soil loading rate from table; <br /> Faster than 0.1 Coarse Sand 1.20 1.00 <br /> • Li�� gpd/ft2 0.1 to5 Sand 1.20 1.00 <br /> 0.1 to 5 Fine Sand" 0.60 2.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer 6 15 SandyLoam Loam 0.79 .00 <br /> }' 32 t%4�S Silt Loam 0.602.440 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; 46 to 60 cal/Loam 0.45 2.67 <br /> 1.20 gpd/ + , s gpd/ftz= a,�� 61 t0120 0ay 0.24 5.00 <br /> Slower than 120 Clay -- __ <br /> "'Sea luring or4. Multiply adsorption width ratio by rock layer width to get 30% more varyfine sand. <br /> required adsorption width; <br /> .i.vo x JO ,ft= ac4,.7 ft <br /> II <br />