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September 17,1998 Designed By:Septic Evaluations Inc. Lic. # 890 Ann Carpentier Chanhassen, MN (612) 470-4024 301 Willow Drive Orono, Hennepin Co. %J. V V f V 1 VaJLVI L: VALIXIYl V V 1L 111 Slope:�+ Cover 1, 1. If landslope is 1%or more, :r subtract rock layer width from adsorption width ,i, to obtain minimum downslope berm toe c ►sna1 ltotkl' , ft- loft= feet2.0 aturai sal 2. Calculate Minimum mound Size a. Determine depth of clean sand fill at upslope Width Davn k"Width upslope edge of rock layer: V-4 Width Abs�.Widlh Separation 3'- ft= feet b. Add depth of clean sand for separation(2a) at upslope edge,depth of rock layer(1 foot)to depth of cover Measurements are in Feet (1 foot)to find the mound height at the upslope edge of rock layer; ft+ lft+ lft= feet c Enter table with landslope and upslope berm ` Wath ratio.Select berm multiplier of 3.23 d. Multiply berm multiplier by upslope mound�; �� w h_ ._ t ` height to find upslope berm width: M, 3.23 x 3.00 = feet e. Multiply rock layer width by landslope to determine drop in elevation; _ tf� aY wia V 0/ { feet l hY E'j Y F�' Z� :Y! 7 ':1 f.Add depth of clean sand for slope `� �'4� � �'�k difference(2e)at downslope edge,toU+usl�3 the mound height at the upslope edge of rock layer(2b)to find the downslope height; 0.6 ft+ 3.00 ft= 3.60 feet Approx. Tons of Sand Needed 187 -- g. Enter table with landslope and downslope berm ratio. Select berm multiplier of 6.26 h. Multiply berm multiplier by downslope mound height to get downslope berm width: 5.26 x - = feet BJ? M SLOPE MULTIPLIERS L Compare the values of step G.1 and Step G.Zh Lard SWM berm ��>owilous berm mWMeo fa,as Select the greater of the two values as the 1v% berm dope nift berm slope ratios downslope berm width; 19 feet j. Total mound width is the sum of 9 ' upslope berm.(G.2d) 0 3.0 4.0 5.0 6.0 7.0 3.0 4.0 5.0 6.0 7.0 8.0 1 3.09 4.17 5.26 6.38 7.53 2.91 3.85 4.76 5.66 6.54 7.41 width plus rock layer width(D.2) 2 3.19 4.35 5.56 6.82 8.14 2.83 3.70 4.54 5.36 6.14 6.90 plus downslope berm width(G.2i); 3 3.30 4.54 5.88 7.32 8.86 2.75 3.57 4.35 5.08 5.79 6.45 ft+ ft+ ft= feet 4 3.41 4.76 6.25 7.89 9.72 2.68 3.45 4.17 4.84 5.46 6.06 k. Total mound length is the sum of upslope 5 3.53 5.00 6.67 8.57 10.77 261 3.33 4.00 4.62 5.19 5.71 berm width(G.2d)plus rock layer length(D.3) 6 3.66 5.26 7.14 9.38 12.07 2.54 3.23 3.85 4.41 4.93 5.41 plus upslope berm width(G.2d); 7 3.80 5.56 7.69 10.34 13.73 2.48 3.12 3.70 4.23 4.70 5.13 ft+ 37 ft+ 10 ft= 57 feet 8 3.95 5.88 8.33 11.54 15.91 2.42 3.03 3.57 4.05 4.49 4.88 9 4.11 6.25 9.09 13.04 18.92 236 1.94 3.45 3.90 4.30 4.65 10 4.29 6.67 10.00 15.00 23.33 2.31 2.86 3.33 3.75 4.12 4 Final Dimensions. 11 4.48 7.14 11.11 17.65 30.43 2.26 2.78 3.23 3.61 3.95 4- 12 4.69 7.69 12.50 21.43 43.75 2.21 2.70 3.12 3.49 3.80 4.08 X © 1997 Melonie L. Elvebak