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Report to GEX Colorado Company <br />Reject Material <br />i Four samples of about 25 pounds each were removed from the mine's <br />reject material. The material appears to consist of sandstone, shale <br />and coal particles. About 4 pounds of each sample were sub-sampled <br />for analysis. After air-drying, the samples were sieved into 2 fractions: <br />less than 1 mm in diameter and greater than 1 mm. Several of the <br />greater than 1 mm fragments were about 4 inches in diameter. The larger <br />fractions were then ground and combined with the smaller diameter material <br />for subsequent chemical and physical analyses. <br />METHODS <br />Saturated Extract: Distilled water was measured into a specified <br />amount of the material until saturation was obtained. The pH of the pastes <br />was determined, and, after vacuum filtration, the electrical conductiv- <br />• ity, calcium, magnesium and sodium concentrations of the extract were <br />measured. The sodium adsorption ration was determined from this data. <br />Available Elements: The material was extracted with an ammonium <br />bicarbonate-DTPA solution. The extract was measured for the desired <br />elements by either colorimetric or atomic absorption spectroscopy. <br />Particle Size Distribution:. The particle size of the less than <br />1 mm fraction was determined by the standard Buoyocos Hydrometer method. <br />Organic Matter: Organic matter associated with the samples was <br />determined by digesting the material with sulfuric acid and potassium <br />permanganate. <br />General Discussion <br />The greatest proportion of the material was greater thanl mm; <br />• this proportion is reflected in the very low saturation percentage of <br />