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, 11-02-98 13:59 F�1 612�975011 S P TESTING INC �U7
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<br /> G. DO�NNSL�PE BERM WIDTH .. , �� `� -`.�
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<br /> 1. IElandslope is Less than 1qa : cs°'r's�,� ' �-j <=:� '��"��i4�` -
<br /> Wit��1 2li.'1 � 'r•y _ 6'Topsoii
<br /> Absorption (F.4): feet +�i so�=
<br /> 2 Calculate minimum mound size
<br /> a. Determine depth of clean sand fill at uv�_ t��,a�+ D°"'� wd�,
<br /> upslope edge of rock layer: �Hr,��,
<br /> Srparation:3'- l- a ft= l• � feet �o A�s��
<br /> b. Add depth of clean sand for sepazation(2a)
<br /> at upslope edge, depth of rock layer(1 foot) to depth of cover
<br /> (1 foot) to find the mound height at the upslope edge of rock layer;
<br /> l:s ft+ lft+ lft= 3�s' feet
<br /> c. Multipiy upslope mound height by 4 to find upslope berm width:
<br /> 3•��x4 =1�feet �s� lt�'
<br /> d. Multiply rock layer width by Iandslope to detezinine drop in elevarion;
<br /> x — %+ 100= feet
<br /> e. Add depth of clean sand for slope difference{2d}at downslope edge, to
<br /> the mound height at the upslope edge of rock layer(2b)to find the downslope height;
<br /> —ft + --€�-= feet
<br /> f. Multiply downslope mound height by 4 to get dor+mslope berm width:
<br /> ----x�=- feet
<br /> g. The width is the sum of upslope berm (G_2c)width plus rock layer width(D.2)
<br /> plusdownslope berm width(G.2f);
<br /> ft+ -ft-+ -�- - -h= feet
<br /> Subtract the�n;mum width(G2.g) hom the adsorption azea (F.4) to find the additional
<br /> downslope area for adsorption
<br /> - ft---—ft=- - feet
<br /> j. Add the additional width(G2.g2) to the upslope (G2.c) and dawn.5olpe width(GZ�
<br /> Upslope: �-_�-f�-+----�t=--�feet �
<br /> Downslope: ft + - ..—#t=--=-- -#eet
<br /> Total width is the sum of upslope berm (G.Zjl)width plus rock layer width (D.2)plus
<br /> downslope berm width(�.2j2);
<br /> �_ft+yo ft+��ft� ��feet
<br /> k. Total mound length is the sum of upslope berm width(G2c) plus rock Iayer
<br /> length(D.3) plus upslope berm width (G2c):
<br /> �ft+ L-�- ft+ �ft= ��feet
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