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du . <br /> <br />Cooperative Extension Service <br />Colorado State Unlveralty <br />Fort Collins, Colorado <br />50523 <br /> <br /> <br />Gibbs & Hill, Inc. <br />Attn: Thomas Colbert <br />Environmental Science & Engineering <br />Dravo Building <br />1250 14th Street <br />Denver, CO 80202 <br />Dear Thomas Colbert: <br />All elemental concentrations are in the normal ranges. The <br />only amendment necessary is lime. See the enclosed recommendations. <br />We are writing up a guideline for analysis and interpretation of <br />the mine overburden;soils,and spoils. As soon as this publication <br />is out of press we will send you a copy. <br />Sincerely, !~~- <br />_ ~ / <br />P.N So'ltanpour~ <br />Professor <br />PNS/pie <br />Enclosure <br />Colorado State University and U.S. Department of Agriculture Cooperating <br />