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Table 6-14 <br /> Chemical and Physical Properties of Underburden <br /> Sandstone and Shale (Unit 5) for <br /> Phase II Samples Collected at Nulca Mine, <br /> November, 1986 <br /> Parameter Phase II Hole Number <br /> Units '873E 874E 875E 876E Mean SO <br /> pH 5.4 4.3 3.9 3.5 4.3 0.8 <br /> EC4, mmhos/cm 3.1 2.2 1.5 1.7 2.1 0.7 <br /> SPS, % 30.9 34.5 33.7 33.3 33. 1 1.5 <br /> Ca , meq/1 14.3 -- -- -- 14.3 -- <br /> Mg,meq/1 10.4 -- -- -- 10.4 -- <br /> Na, meq/1 2.3 -- -- -- 2.3 -- <br /> SAR6 0.8 -- -- -- 0.8 -- <br /> Total S, % 0.32 0. 13 0.10 0.01 0.14 0.13 <br /> Sulfate S, % 0.28 0.01 0.09 0.00 0.10 0. 13 <br /> Pyrite S, % 0.03 0.02 0.00 0.00 0.01 0.01 <br /> Organic S, % 0.01 0. 10 0.01 0.01 0.03 0.04 <br /> NP7 12.2 4.6 -0.4 -0.9 3.9 6. 1 <br /> ABP8 10.9 0.8 -0.7 -1.2 2.4 5.7 <br /> Fe, ppm 514.7 23.3 21.1 26.5 146.4 245.5 <br /> Mn, ppm 20.1 2.8 1.6 0.5 6.2 9.3 <br /> Ni , ppm 3.2 -- -- -- 3.2 -- <br /> Zn, ppm 7.7 -- -- -- 7.7 -- <br /> Mo, ppm 0.2 -- -- -- 0.2 -- <br /> 1Unit 5 consists of light gray shale and sandstone below the lower Dakota <br /> 2Coal seam. <br /> 3For drill hole location, see Exhibit 6-3A, Overburden Sample Locations. <br /> 4SD-Standard Deviation. <br /> 5EC-Electrical Conductivity. <br /> SP-Saturation Percentage. <br /> 6SAR-Sodium Adsorption Ratio. <br /> NP-Neutralization Potential ; Units are tons of CaCO3 required per acre <br /> furrow slice. <br /> BABP-Acid Base Potential ; Units are tons of CaCO required per acre furrow <br /> slice; ABP was calculated from Pyrite and Organic S. <br /> 6-49 Revised 11/01/86 <br />