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• ROCKCASLE COAL COMPANY <br />GRASSY CREEK MINE <br />PIT TOPSOIL MEASUREMENTS <br />SAMPLE SITE DEPTH <br /> (inches) <br />1 26 <br />2 29 <br />3 21 <br />4 9 <br />5 10 <br />6 20 <br />7 16 <br />8 25 <br />9 10 <br />10 13 <br />11 16 <br />12 12 <br />13 35 <br />• 14 31 <br />15 21 <br />16 37 <br />Average Depth <br />21 inches <br />Standard Deviation 9 inches <br /> <br />