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• <br />Intsrfl1ountaln Laboratorles.lnc. <br />Sheridan, Wyoming 82801 <br />PEABODY COAL COMPANY <br />FLAGSTAFF, ARIZONA <br />MINE: SENECA <br />N <br />N <br />November 25, 1991 <br />Lab No. location <br />65309 NC-132 <br />65310 NC-133 <br />65311 NC-134 <br />65312 <br />65313 NC-135 <br />65314 MC-136 <br />65315 <br />65316 NC-136E <br />65317 NC-137 <br />65318 NC-138 <br />65319 <br />65320 NC-139 <br />65321 NC-140 <br />65322 NC-141 <br />65323 NC-142 <br />65324 MC-143 <br />65325 NC-144 <br />65326 <br />65321 NC-145 <br />65328 NC-146 <br /> <br />1633 Terra Avenue <br /> <br />Tel. (307) 672-8945 <br />Page 1 of 2 <br /> pH EC Total T.S. Neut. T.S, Sulfate Pyritic Organic PyrS PyrS <br /> mmhos/cm Sulfur AB Pat. ABP Sulfur Sulfur Sulfur AB ABP <br />Depths @ 25'C ~ t/1000t t/1000t t/1000t t i 3 t/1000t t/1000t <br />0.0-4.D 7.5 2.44 0.21 6.56 27.4 20.6 <br />0.0-4.0 6.3 3.20 0.01 0.31 9.69 9.37 <br />0.0-2.0 7.0 .1.44 0.43 13.4 8.02 -5,41 0.18 0.24 0.01 7.50 0.52 <br />2.0-4.0 6.4 3,62 0.19 5.94 4.82 -1.12 0.03 0.09 0.07 2.81 2.01 <br />0.0-4.0 3.9 3.75 0.05 1.5fi 0.10 -1.46 <0.01 0.03 0.02 0.94 -0.84 <br />0.0-3.0 6.3 0.79 D.14 4.37 3.21 -1.17 0.13 <0.01 0.01 -0.01 3.21 <br />3.0-4.0 6.3 1.73 <0.01 0.00 3.49 3.49 <br />0.0-3.0 6.4 .0,76 0.01 2,19 2.72 0.54 <br />0.0-4.0 4.8 2.66 0.06 1.87 0.52 -1.35 0.03 0.01 0.02 0.31 0.21 <br />0.0-1.0 6.3 1.56 0.32 ]0.0 4.23 -5.77 0.30 <0.01 0.02 -0.01 4.23 <br />1.0-4.0 5.7 3.20 0.76 23.1 2.24 -21.5 0.36 0.34 0.06 10.6 -8.36 <br />0.0-4.0 5.1 4.62 0.30 9.3) 7.07 -2.30 0.05 0.15 0.10 4.69 2.38 <br />0.0-4.0 7,3 3,13 0.25 7.81 19.9 12.1 <br />0.0-4.0 1.2 3.01 0.27 8.43 23,7 15.3 <br />0.0-4.0 7.3 3.17 0.66 20.6 25.1 5,07 <br />0.0-4.0 7.D 3.43 0.03 0.94 22.8 21.9 <br />0.0-1.5 7.4 1.86 0.49 15.3 17.5 2.19 <br />1.5-4,0 7.3 3.44 0.52 16.2 2i.1 10,9 <br />0.0-4.0 1.0 3.28 .0.01 0.31 20.0 19.7 <br />0.0-4.0 7.3 1.18 1.03 32.2 7.43 -24.7 1.01 0.01 0.01 0.31 7.12 <br />• Sample NC-136E is a field-split blind duplicate sample of NC-136, 0-3'. <br />Abbreviations used in acid base accounting: i.S.= Total Sulfur, AB= Acid Base, ABP= Acid Base Potential, PyrS= Pyritic Sulfur, Pyr+Org= Pyritic Sulfur + Organic Sulfur, <br />Neut. Pot.= Neutraliaation Potential <br /> <br />