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Lorenciro Canyan Mine - Geolagv Technical Report <br />Primero Coal <br />Additional analyses were conducted on the primero coal seam. Data for the primero coal seam <br />is summarized below and presented in Table G-8. <br />The selenium concentrations for the two samples analyzed were 0.153 mg/Kg and 0.009 mg/Kg, <br />respectively. One of these values slightly exceeds Wyoming Guidelines. However, this material <br />will be mixed which should reduce the concentrations. Therefore, these values would not interfere <br />with the hydrologic balance or reclamation activities. <br />The sodium adsorption ratio for the two samples analyzed was 25.40 and ,19.40, respectively. <br />According to Wyoming DEQ Guidelines overburden with SAR values above 15 are not suitable <br />for reclamation success. Since SAR values exceed 15, a four foot thick layer of top soil cover will <br />be placed over the material and should have a good reclatation suitability. <br />Primero Coal Floor <br />• Data for the Primero coal floor samples is presented in Table G9. <br />The selenium concentrations for the two samples analyzed were 0.171 mg/Kg and 0.084 mg/Kg, <br />respectively. One of these values slightly exceeds Wyoming Guidelines. However, this material <br />will be mixed which should reduce the concentrations. Therefore, these values would not interfere <br />with the hydrologic balance or reclamation activities. <br />The sodium adsorption ratio for the two samples analyzed was 19.0 and 20.10, respectively. <br />According to Wyoming DEQ Guidelines overburden with SAR values above 15 aze not suitable <br />for reclamation success. Since SAR values exceed 15, a four foot thick layer of top soil cover will <br />be placed over the material and should have a good reclamation suitability. <br />SECTION 4 -REFERENCES CITED <br />Boyd, John T. Company. 1979. Miscellaneous Reports. <br />• Tweto, Ogden. 1979. Geologic Map of Colorado, 1979. <br />Geology~475/Deccmbtr 14, 1996 29 <br />