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• The lower pinnacle coal seam has an Iron Sulfide content of <br />approximately 0.037% (or 374 milligrams per kilogram). <br />This value was determined by the following method: <br />FeS2 is Iron Pyrite <br />by analysis ll 72-100793 (CTfiE report following), our run-of-mine <br />coal contains 0.02% Pyritic Sulfur. <br />by Chemistry: <br />The total atomic weight of FeS2 is: 55.84 + (2)x32.06 <br />= 119.96 <br />Therefore: FeS2 is 119196 x 100% Sulfur <br />= 53.45% Sulfur <br />our Coal is 0.02% x 53045 percent FeS2 <br />= 0.0374 7, Pyrite <br />= 374 mg/kg FeS2 <br />• <br />• <br />Rev 04/24/81 <br />45.1 <br />