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Ill Illlllllllllllll w F~~ c ~~ <br />~ ~ <br />12055 W. Second Place • P.O.Box 15596 • Lakewood,Coloratlo 80215 • Telephone (303)989-5037 <br />April 26, 1988 <br />~, _ r.. <br />E l._~- - -_ .. ...- .'_.F. <br />Mr. Jim Stevens l~~~t ~ ~) l~,S <br />Reclamation Specialist <br />Colorado Mined Land '` '`~`-' ~ ~ ~- <br />Reclamation Division .ttG_!:i;a:.'~,;;,!~;,,.,~:~~.~ <br />1313 Sherman Street y <br />Denver, Colorado 80203 <br />Re: Request for Modification of Cessation Order No. C-86-017, <br />Golden Eagle Mine, Permit No. C-81-013. <br />Dear Mr. Stevens: <br />Wyoming Fuel Company (WFC) is requesting modification ofd <br />the above-referenced Cessation Order to change the temporary <br />monitoring program described in Step 1, to change the abatement <br />time frames specified, and to obtain interim approval of NALCO <br />7883 flocculant. <br />A biomonitoring study was conducted by ERT of Ft. Collins <br />during the week of April 18, 1988 to evaluate the acute aquatic <br />toxicity of mine water both prior to entering the pond 002 system <br />and exiting this system. The biomonitoring showed no acute <br />aquatic toxicity at either of these sampling points. A written <br />report of these results should be available by May 5, 1988. <br />WFC's investigations have indicated that an operational <br />error resulted in an overdose of NALCO 8852 flocculant into Pond <br />002r which appears to be the additive which caused the fish <br />mortality which is reported to have occurred on ox about March 5, <br />1988. (WFC was not notified, and was unaware, of any problem <br />until March 8, 1988.) Pond 002 di in esu <br />as soon as WFC became a are o the fish loss on March_8 ham <br />the yb Hour static acute-x,c:5u to t as reportea xn <br />e atetxa a e or t xs product. Sample results <br />taken upstream and downstream from the mine discharge in the <br />Purgatoire Rivet at the same time showed NALCO 8852 levels below <br />the laboratory detection limit of <1 ppm. 1 <br />WFC has taken two rounds of samples per Step 1 of the <br />Division's Order. One round was split and sent to NALCO Chemical <br />Company for analyses. The other round is currently being split <br />and will also be sent to NALCO for analyses. WFC has not <br />received any results to date. We anticipate the NALCO 8852 <br />flocculant will be nondetectable (<1 ppm), as the recent <br />biomonitoring studies showed no aquatic toxicity. Therefore, <br /> <br />L <br />~l <br />~~t <br />~~ <br />