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project although the ash tends to be on the high side. The A and C Seams must be washed <br />• to be marketed as a metallurgical product. They are also well suited for industrial and <br />steam utilization. Representative coal analyses for each of the seams have been included <br />in this document and are shown on Table 2, Representative Coal Quality Analysis. The <br />Geology Map (Map 4) depicts the location of drill holes, the coal croplines, and the dip and <br />strike of the coal to be mined. <br />Chemical Properties <br />Several overburden and inner burden samples were taken from the highwall of the existing <br />operation. The overburden sample consisted of a composite of the several samples. The <br />composite sample was the result of sampling the overburden from areas that were pre- <br />stripped in preparation for mining. The inner burden was sampled in a similar manner. <br />The inner burden samples were taken from the exposed strata on the highwall down to the <br />C Seam. Table 3, Chemical Parameters List, describes the parameters included in the <br />sampling program. The analysis of the overburden and inner burden indicates that <br />significant toxicity problems do not exist. Table 4, Overburden/Inner Burden Analysis, <br />describes the information obtained from the sampling of those materials. <br />Set forth below is a brief description of the sample results. Reference is made to the <br />Wyoming Guidelines in the discussion below. Table 9 in 2.04.9 depicts the suitability ratings <br />utilized. -Generally, the results described on Table 9 indicate the pH of the overburden and <br />inner burden borders in mildly alkaline. Therefore, acidity problems should not be <br />encountered. <br />The recorded values for electrical conductivity of the samples in the permit area range from <br />0.8 to 3.4. No samples are above the limits set by the Wyoming Guidelines; therefore, no <br />toxicity problems will exist in the permit area with respect to electrical conductivity. <br />Saturation Percentage <br />The saturation percentage of the samples taken within the permit area range from 20.9 to <br />38.6 percent (Table 4). The average value of saturation percentage is 31 percent. The <br />Wyoming Guidelines for Soil have set a minimum value of 25 percent and a maximum <br />]imitation of 80 percent. Only one of the samples analyzed was below the 25 percent or <br />over the 30 percent limit. No toxicity or other problems should be expected with respect <br />to saturation percentage. <br />Sodium Absorption Ratio <br />The sodium absorption ratio (S.A.R.) for the materials tested indicate an average S.A,R. of <br />0.71. All S.A.R. values reported are well under the rating of 6 which is the maximum S.A.R. <br />allowable to be considered good in accordance with the Wyoming Guidelines. <br />2.04-8 Revised 12-20-91 <br />