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• Conductivity <br />The values for electrical conductivity range from 0.671 <br />mmhos/cm to 4.190 mmhos/cm, with the weighted mean value fur <br />hole LM1B-4 being 1.683 and for hole LM2C-5 being 1.480. Both of <br />these mean values fall well within the "good" category according <br />to Wyoming DEQ Guidelines. The highest conductivities in both <br />holes occur near the surface. No toxicity problems will result <br />from any of the overburden with respect to electrical conductivity. <br />Sodium Absorption Ratio <br />Wyoming guidelines state that any lithology having an <br />S.A.R. in excess of 15 is "unsuitable" as a source for topsoiling <br />material. Thirteen of the eighteen samples analyzed in the two <br />holes are higher than 15 with three of the remaining five zones <br />being less than a value of 10. The values for hole LM1B-4 range <br />from a low of 26 to a high of 76, with the mean being 50.87. In <br />• sharp contrast to this, hole LM2C-5 has a minimum value of 2.7 and <br />a maximum of 26, with the weighted mean value being only 11.97. <br />Generally speaking, the S.A.R. values tend to increase <br />with depth in both holes sampled. Ho 1e LM1B-4 has its three worst <br />values (68, 74 and 76) near the center of the section sampled in <br />the hole. However, the values immediately above and below the <br />Sudduth Coal in this hole are also very high (55, 59 and 55). Hole <br />LM2C-5, however, has pronounced lower S.A.R. values compared to <br />Hole LM1B-4. The highest values in Hole LM2C-5 are located <br />immediately above and below the coal zone. Two of the zones in <br />the hole are categorized as "good", with one zone "fair", two zones <br />"poor" and the remaining three zones "unsuitable". The weighted <br />mean for the hole is only 11.97 which still places the hole in the <br />"poor" category, however, this value is almost five times lower <br />than the mean value of 50.87 for Hole LM1B-4. <br />n <br />-46- <br />