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iii liiiininliilii <br />999 <br />BASIN <br />RESOURCES, ~N~. <br />a subsidiary of ENTECH, Inc. <br />RE~Ei~E~ <br />JUC 201995 <br />Divis,on of Minerals d Geo1p9Y <br />14300 Highway 12 <br />Weston, Colorado 81091 <br />(719)868-2761 <br />Purchasing (719) 868-2768 <br />Fax (719)868-2275 <br />July 19, 1995 <br />Mr. Randy Price <br />Colorado Division of Minerals and Geology <br />1313 Sherman, Room 215 <br />Denver, CO 80203 <br />RE: New Elk Mine; Permit C-81-012 <br />TR Application-Disposal of Drilling Fluids <br />Dear Mr. Price: <br />Enclosed are three sets of application information for a <br />technical revision to the New Elk Permit. This revision is for the <br />disposal of drilling fluid from exploration, degas, and development <br />drilling pits to pond 004 at the New Elk Mine. <br />These fluids consist of water, drill cuttings, and residual <br />drilling chemicals (foamer and defoamer)- The drilling fluid <br />consists of 95°s water. The remaining 5% consists of drill <br />cuttings, residual bentonite, and residual drilling chemicals. The <br />chemicals are a foamer and a defoamer. These occur in <br />concentrations of 0.5% and 0.1~, respectively, The foamer is <br />biodegradable. The defoamer is an alcohol based mixture which <br />readily evaporates. <br />The pond in which the fluid will be deposited is oversized and <br />has never discharged. It has the capacity to hold the equivalent <br />of a 100 year and 25 year event combined, plus 3 years of sediment <br />storage without discharging out the first opening of the primary <br />spillway. Because this pond has the excess capacity, this site was <br />chosen for drill fluid disposal. <br />In addition to the application, drill foamer and defoamer MSDS <br />sheets are enclosed for your review. Please call if additional <br />information is required. <br />Sincerely, <br />Environmental Engineer <br />