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EXHIBIT 7 <br />• SOIL PROFII:E DESCRIPTION <br />Aaberg Series (35) <br />The Aaberg series is a member of the fine, montmorillonitic family of <br />Borollic Vertic Camborthids. <br />Typical Pedon: Aaberg silty clay <br />All 0- 2"-grayish brown (lOYR 5/2) silty clay, dark grayish brown <br />(lOYR 4/2) moist; moderate fine subangular blocky struc- <br />ture; hard, friable, sticky, plastic; non-calcareous, <br />neutral; abrupt smooth boundary. <br />B21 2- 8"-Brown (lOYR 5/3) silty clay, brown (lOYR 5/3) moist; <br />• moderate medium angular blocky parting to moderate fine <br />angular block structure; very hard, very firm, very sticky <br />and very plastic; calcareous, neutral; clear smooth bound- <br />ary. <br />B22 B-23"-Pale brown (lOYR 6/3) silty clay, pale brown (lOYR 6/3) <br />moist; moderate coarse angular blocky parting to moderate <br />medium angular blocky; very hard, very firm, very sticky, <br />very plastic; calcareous, mildly alkaline; clear smooth <br />boundary. <br />B3 23-32"-Pale brown (lOYR 6/3) silty clay, pale brown (lOYR <br />6/3) moist; moderate coarse angular blocky structure; very <br />hard, very firm, very sticky, very plastic; calcareous, <br />mildly alkaline; clear smooth boundary. <br /> <br />