1988-04-11_PERMIT FILE - C1981008A (4)

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table 6-6 Chemical and Physical Properties of Overburden Material (Strata Above Upper Dakota Coal Seam) for Phase I Samples Collected at Nucla Mine, November 1986 Parameter Phase I Hole Number Units 1C 2C 3C 4C 695E 697E 775E Mean SD 2 PH 6.4 6.0 7.2 7. 1 7.0 7.0 7.3 6.9 0.5 EC3, mmhos/cm 3.5 5.5 3. 1 1. 1 4.2 3.2 3.5 3.4 1.3 Sand, % 48.6 46.2 39.3 52.7 50.6 52.4 49.2 48.4 4.6 Silt, % 29.4 30.2 32.9 18.5 22.5 24.0 27. 1 26:4 5.0 Clay, % 22.0 23.6 27.8 28.8 26.9 23.6 23.7 25.2 2.6 SP , % 57.0 54.9 55.9 51.1 50.4 44.2 42.7 50.9 5.6 Ca , meq/1 19.3 27.3 13.6 5.4 23. 1 22.8 21.5 19.0 7.3 Mg, meq/l 10.8 14.1 34.8 5.6 39.8 18.6 23.5 21.0 12.5 Na , meq/1 1. 1 8.8 3. 1 4.2 7.6 2.2 5.5 4.6 2.8 SAR 0.4 1.9 1.1 2.2 1.6 0.5 1.3 1.3 0.7 Total N, ppm 2.7 5.5 4.1 8.4 * * * 5.2 2.4 N Total S, % 0.44 0.45 0.70 0.20 0.76 0.62 0.61 0.54 0. 19 w ABP 10.2 4.8 8.0 12. 1 18.7 38.5 39.0 18.8 14.3 B, ppm 0.8 2.6 1. 1 1.6 * * 0.7 1.4 0.8 Cd, ppm 0.08 0.05 0.05 0.05 * * 0.06 0.06 0.01 Cu, ppm 2. 1 2.0 2. 1 4.4 0.7 1.0 1.6 2.0 1.2 Fe, ppm 187.7 196.5 211.6 190.0 * * 199.0 197.0 9.4 Pb, ppm 2. 1 2.2 2.2 3.2 * * 2.0 2.3 0.5 Mn, ppm 11.9 7. 1 9.9 12.0 * * ** 10.2 2.3 Hg, ppm 0.02 0. 10 0.04 0. 17 * * * 0.08 0.06 Mo, ppm 1.3 1.4 1.4 1.0 1.0 1.0 1.3 1.2 0.2 Se, ppm 0. 1 0. 1 0. 1 0. 1 0.01 0.01 0.01 0. 1 - Zn, ppm 1.6 2.4 1.6 1. 1 15.8 6.9 ** 4.9 5.7 Ni , ppm 0.8 0.6 0.9 0.6 1. 1 1.2 1.9 1.0 0.4 m k , ppm 124.3 110.3 179.9 94.7 123.2 128.2 161.6 131.7 29.4 P, ppm 7.7 8. 1 5.1 11.5 3.0 3.7 3.9 6.1 3.1 N !D 0- 1 For drill hole location, see Exhibit 6-3A, Overburden Sample Locations 0 2 SD - Standard Deviation Z_' 3 EC - Electrical Conductivity 0 4 SP - Saturation Percentage 5 ABP - Acid Base Potential ; Units are tons of Calcium Carbonate required per acre furrow slice * These analyses were not performed ** Samples were contaminated by drilling grease