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Table 2.04.6-9 <br />• Additional Chemical Parameters Required By CDMG For <br />Phase 1 Drill Hole 870e, <br />New Horizon 2 Study Area, Montrose County, Colorado <br /> LITHOLOGIC UNITS' <br />PARAMETER <br />(UNITS) <br />1 <br />2 <br />3 <br />4 <br />5 MEAN2 <br />Copper, ppm 0.5 0.4 0.3 1.1 0.8 0.5 <br />Lead, ppm 0.5 1.2 1.6 2.0 1.4 0.7 <br />Arsenic, ppm <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <br />Zinc, ppm 0.5 1.2 0.8 0.8 1.3 0.6 <br />Nickel, ppm 0.3 0.4 0.1 1.2 0.2 0.3 <br />Cadmium, ppm <0.02 <0.01 <0.01 <0.01 <0.02 <0.02 <br />Mercury, ppm 0.03 <0.02 0.01 0.04 0.01 <0.03 <br />' Lithologic units are identified in Attachment 2.04.6-1 (previously Peabody Appendix 6-1) <br />and discussed earlier in the Overburden, Interburden, and Underburden Characteristics <br />section. <br />• 2 Weighted mean value only includes Lithologic Units 1, 2, 3, and 4 which will all be disturbed <br />by mining. Mean thickness of Lithologic Units 1, 2, 3, 4, and 6 is 55.9, 6.5, 7.1, 2.7, and 9.7 <br />feet, respectively. <br />i• <br />REVISED August 2006 2.04.6-41 <br />