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• <br />u <br />Table 6-12 <br />Chemical and Physical Properties of Interburden <br />Sandstone (Unit 3) for <br />Phase II Samples Collected at Nulca Mine, <br />November, 1986 <br />Parameter Phase II Hole Number2 <br />Units 873E 874E 875E 876E Mean <br />pH 4.6 5.3 4.7 7.6 5.5 <br />EC4, mmhos/cm 2.3 4.3 2.7 4.2 3.4 <br />SPS, % 32.6 36.4 31.9 36.2 34.3 <br />Ca, meq/1 15.8 -- -- -- 15.3 <br />Mg,meq/1 3.7 -- -- -- 3.7 <br />Na, meq/1 6.4 -- -- -- 6.4 <br />SAR6 2.6 -- -- -- 2.6 <br />Total S, °0 0.28 0.63 0.09 0.26 0.32 <br />Sulfate S, % 0.22 0.49 0.02 0.25 0.25 <br />Pyrite 5, % 0.05 0.13 0.06 0.00 0.06 <br />Organic 5, % 0.01 0.01 0.01 0.01 0.01 <br />NP7 1.7 2.1 0.4 4.4 2.1 <br />ABPB -0.2 -2.2 -1.8 4.1 0.0 <br />Fe, ppm 75.2 23.9 25.1 1.3 31.4 <br />Mn, ppm 5.4 3.6 0.3 0.2 2.4 <br />Ni, ppm 0.3 -- -- -- 0.3 <br />Zn, ppm 0.9 -- -- -- 0.9 <br />Mo, ppm 0.1 -- -- -- 0.1 <br />SD3 <br />1.4 <br />1.0 <br />2.4 <br />0.23 <br />0.19 <br />0.05 <br />0.00 <br />1.7 <br />2.9 <br />31.2 <br />2.6 <br />lUnit 3 consists of brown and light brownish gray sandstone interburden <br />2material. <br />3for drill hole location, see Exhibit 6-3A, Overburden Sample Locations. <br />45D-Standard Deviation. <br />SEC-Electrical Conductivity. <br />6SP-Saturation Percentage. <br />75AR-Sodium Adsorption Ratio. <br />NP-Neutralization Potential; Units are tons of CaC03 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 Organ~c S. <br />6-47 <br />Revised 11/01/86 <br />