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4 - <br />Roof, Floor, Parting, and Coal Analysis <br />South end - No. 9 Mine <br />Parameter Coal Parting Roof Floor <br />pH (units) 7.2 7.1 7.3 7.2 <br />EC mmhos/cm @ 25°C 0.81 0.69 2.69 0.79 <br />Saturation % 75 45 58 52 <br />Calcium (meg/1) <0.01 1.32 0.27 0.92 <br />Magnesium (meg/1) 0.07 1.46 0.34 1.13 <br />Sodium (meg/1) 7.92 3.14 20.8 6.03 <br />SAR 39.6 2.65 37.7 5.96 <br />Combustible Solids % 77 16 9 36 <br />Pyritic Sulfur % 0.04 0.06 0.12 0.04 <br />Sulfate Sulfur % <0.01 <0.01 <0.01 <0.01 <br />Organic Sulfur % 0.27 0.04 <0.01 0.16 <br />Total Sulfur % 0.31 0.10 0.12 0.20 <br />Neut. Pot. as CaC03 % 2.0 0.7 6 1.4 <br />Acid Base Potential 10 4 2 8 <br />Arsenic' <0.01 0.08 0.70 <0.01 <br />Boronz 9.20 1.35 0.45 2.25 <br />Iron' 4.40 32.4 30.4 23.6 <br />Lead' 0.38 5.78 7.88 3.52 <br />Manganese' 0.34 0.34 3.24 0.88 <br />Mercury3 0.060 0.120 0.120 0.140 <br />Molybdemum' <0.2 <0.2 <0.2 <0.2 <br />Selenium' <0.01 0.08 0.46 0.02 <br />Zinc' 0.30 0.96 16.6 0.47 <br />N-N03z 0.7 0.8 13.9 0.7 <br />Note: Concentrations expressed as ppm unless otherwise noted. <br />No particle size analysis due to coal in sample. <br />(1) AB-DTPA Extraction <br />(2) Hot Water Extraction <br />(3) Acid Extraction <br />