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August 28, 1998 Designed By:Septic Evaluations Inc. Lic. #890 <br /> Ann Ca�peniier Chanhassen, MN (612)470-4024 <br /> 301 Wil(ow Drive <br /> Orono, Hennepin Co. <br /> V. a./V 1 t a tld#&Ajs L ut.a%ara V r W 1l 1 Cow t <br /> I. If landslope is 2%or more, <br /> subtract rock layer width from adsorption widthIto <br /> to obtain minimum downslope berm tce1 `'`'� <br /> 27 ft. - loft= 17 feet NoWsag 2.0 _ ` ,.:: 6-Top" <br /> 2 Calculate Minimum mound Size <br /> a. Determine depth of clean sand fill at <br /> upslope edge of rock layer: <br /> Separation 3x- 2.0 ft= 1.00 feet <br /> b. Add depth of clean sand for separation(2a) <br /> at upslope edge,depth of rock layer(1 foot)to depth of cover Measurements are in Feet <br /> (1 foot)to find the mound height at the upslope edge of rock layer; <br /> 1.00 ft+lft+lft= 3.00 feet <br /> C. Enter table with landslope and upslope bermhlUP 'A'A i, <br /> ratio.Select berm multiplier of 3.45 ;f� F x { <br /> d. Multiply berm multiplier by upslope moundMyr: �B'd10 <br /> height to find upS10 berm width: <br /> 3.45 X 3.00tt <br /> = 1 feet <br /> jq�, �± v Y 'i xyi �. + � p•�'r'�L zri�f k�.cc a�N <}i �rrL y 3�L�.�a <br /> ira •1,. 'v Z� i� 4 .`^le ♦d` x §p!4 i+' k v Y,� h.z r, <br /> e. Multiply rock layer width b <br /> P! by ✓� r .x�` �7f fl �l-Y•n"n 1 H p � .rl...�_is. .1..r� ,i f 1� i � <br /> landslope to determine dr o�in elevation; �,�4 t r T�'��r � " r; <br /> tion , <br /> 10 4.2 _ 4 <br /> X %+100- feet <br /> f.Add depth of clean sand for slope V� <br /> s''y, 3 a:.F.. 4�N,.{1 x q�' l :� <br /> difference(2e)at downslope edge,to Tow L*nVh`_ 58 <br /> the mound height at the upslope edge <br /> of rock layer(2b)to find the downslope height; <br /> 0.4 ft+ 3.00 ft 3.42 feet Approx. Tons of Sand Needed 186 <br /> g. Enter table with landslope and downslope berm ratio.Select <br /> berm multiplier of 4.76 <br /> h. Multiply berm multiplier by downslope mound height to get <br /> downslope berm width: <br /> 4.76 X 3.42 = 16 feet <br /> s1Jo�rs 1►osrUt�r�.s <br /> i. Compare the values of step G.1 17 <br /> and Step G.2h 16 LAM aea ft or Urkm ��uepan�� <br /> Select the greater of the two values as the �• a�.,1 X14. <br /> downslope berm width; 17 feet <br /> 1. Total mound width is the sum of 7 <br /> 44 s 0 o 6 0 7A 34 44 $A 6A A 6.0 <br /> upslope berm(G.2d) 0 3 <br /> width plus rock layer width(D.2) I 3.09 4.17 5.26 6.36 733 291 . 335 4.76 3.66 6.54 7.41 <br /> plus downslope berm width(G.2i); <br /> 1 3.19 435 536 621 8.14 123 3.70 434 $36 6.14 6.90 <br /> 3 3.30 434 s36 7.31 6.a6 275 3.57 4.35 $ot 5.79 bas <br /> 10 ft,f 10 (�♦ 17 ft= 37 feet 4 3.41 4.76 6.15 739 9.72 IS 3.45 4.17 424 SA6 646 <br /> lG Total mound length is the sum of upslope s 3.53 540 6.67 6.37 10.77 2.61 3.33 too 4.62 3.19 s.71 <br /> berm width(G.2d)plus rock layer length(D.3) 6 3.66 5.26 7.14 939 1247 2.54 3.13 3.85 4.41 493 SAI <br /> plus upslope berm width(G.2d); 7 3.80 5 56 7.69 10.34 13.73 2A8 3.12 3.70 4.23 4.70 5.13 <br /> 10 ft+ 37 ft+ 10 ft= 58 feet 8 3.95 528 8.33 11.34 16.91 2.42 3.03 337 4.05 4A9 4.88 <br /> 9 411 6.25 9.09 13.04 18.92 2.36 194 3AS 3.90 4.30 4AS <br /> 10 4.29 W 10.00 1100 23.33 231 226 333 3.75 4.12 4 <br /> Final Dimensions: 11 4A8 7.14 11.11 17.65 3043 2.26 2.78 313 3.61 39S 4.. <br /> 11 4.69 7.69 1250 21A3 43.73 1.21 270 3.12 3A9 380 4.06 <br /> 37 X va <br /> 01997 Melonie L. Elvebak <br />