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~ iii iiiiiiiiiiiu iii •i Wyoming fuel Compon~ 12055 W. Second Place • P.O.Box 15596 • Lakewood, Colorado 80215 • Telephone (303)989-5037 May 10, 1988 ~' k rT~ ~- ~r Ms. Sandy Marek Engineering Technician - - Permits and Enforcement Section Water Quality Control Division 4210 East 11th Avenue Denver, Colorado 80220 Re: Response to request for information, Golden Eagle Mine, CPDS Permit No. CO-0033367 Dear Ms. Marek: Following are Wyoming Fuel Company's (WFC) written responses to your letter of March. l4, 1988. Of course, much of the following information has been previously furnished to you verbally. 1. NALCO 8873 Flocculant and NALCO 6852 Coagulant are the trade names of the flocculants used to treat mine water at the Golden Eagle Mine for the period of January 1 ( through March 11, 1968. NALCO 8852 was used in treating mine water entering Pond 003. NALCO 8852 and NALCO 8873 were used for treating mine water entering the Pond 002 system. 2 ~ 3. WFC does not have operating records to show daily addition of flocculants to the pond systems. WFC resumed treatment of the 002 pond system with NALCO 8652 on January 12, 1988 after previous attempts with NALCO 8873 had been unsuccessful. NALCO 8852 was used until March 8, 1988. The mine water treatment system was modified entering the Pond 002 system on February 29, 1988. This modification involved utilizing a two pump treatment system with one pump as a backup. On February 12, 1988 a system for addition of NALCO 8852 was set up for treating mine water entering Pond 003. System dosing continued until March 4, 1988 to Pond 003. The Flocculant injection system is located in the fan house for 002 ponds. Flocculant was added at the hoist house system prior to entering Pond 003. (See Figure 1). At the fan house, flocculant was pumped by direct