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• Larencito Camon Mint - Gealo Techniral R[ rt <br />All parameters required for analysis were compared with overburden/interburden suitability <br />ratings developed by the Wyoming Department of Environmental Quality and/or the Montana <br />Department of State Lands to determine potential limitations relative to revegetation and <br />hydrologic consideration. Parameters above suitability ratings developed by the Wyoming <br />Department of Environmental Quality and/or the Montana Department of State Lands are <br />discussed below: <br />Ciruela Coal Roof <br />Table G7 summarizes the analyses of the roof samples. <br />eleniu <br />The average selenium concentration was 0.082 mg/Kg with the highest concentration being 0.134 <br />mg/Kg. According to the Wyoming Guidelines, selenium concentrations that exceed 0.1 mg/Kg <br />are marginal for revegetation. Once this material is mixed with remaining materials the <br />concentrations will be reduced. Therefore, no problems concerning selenium and revegetation are <br />anticipated. <br />• Sodium Adsorption Ratio <br />The average sodium adsorption ratio was 21.99 with a range of 0.62 to 31.8. According to <br />Wyoming DEQ Guidelines overburden with SAR values above 15 are not suitable for reclamation <br />success. Since SAR values exceed 15, a four foot thick layer of top soil cover will be placed over <br />the overburden and should have a good reclamation suitability. <br />Ciruela Coal <br />Table G-8 summarizes the analyses of the Ciruela coal samples. Additional analyses were <br />conducted on coal seams anticipated to be surface mined. Data for the O, P, Q and N coal seams <br />are summarized below and presented in Tables G-5 and G-6. <br />Selenium <br />The average selenium concentration was 0.080 mg/Kg with the highest concentration being 0.159 <br />mg/Kg. According to the Wyoming Guidelines, selenium concentrations that exceed 0.1 mg/Kg <br />are marginal for revegetation. Only one sample exceeded 0.1 mg/Kg. Once this material is mixed <br />with remaining overburden materials the concentrations will be reduced. Therefore, no problems <br />concerning selenium and revegetation are anticipated. <br />\J <br />Geologya75/Decembcr 14. 1996 24 <br />