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ROMAx Z. Praia, Pa.D <br /> 7[OC"lMI7T <br /> 1.76 ORCHARD DRIVE <br /> OOLDEN. COLORADO 70x01 <br />• 17071777.7677 <br />May 5. 1980 <br />Mr. Joseph P. Feldstein <br />Gibbs & Hill, Inc. <br />The Dravo Building <br />1250 14th Street <br />Denver. Colorado 80202 <br />Dear Josephs <br />I am enclosing my final report "Geochemical Investigation of <br />Coal-Waste Impoundment at the North Thompson Creek Mines," to <br />be used and referenced with Snowmass Coal Company's permit <br />applications. <br />• Groundwaters in the vicinity of the proposed coal-waste disposal <br />and impoundment Bite are enriched in calcium, magnesium, and <br />~• sulfate content and are depleted in trace metal content. Labo- <br />ratory leaching tests on typical coal-waste indicate that the <br />coal-waste that is discharged to the disposal pile is not likely <br />to introduce significant quantities of contaminants other than <br />the type ions that are already present in local groundwaters. <br />Furthermore, the coal-waste is unlikely to significantly alter <br />overall groundwater quality in the immediate vicinity. <br />Yours truly, <br />I~~AN 2. P H & ASSOCIATES, INC. <br />Roman ~Pyrih <br />President <br />R2P/ldp <br />Enclosure <br /> <br />