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tOTECTION AGENCY <br /> UNITED STATES E' 1111111111111111111 <br /> ® RL 999 <br /> 999 18th STREET - SUITE 500 t� <br /> DENVER, COLORADO 80202-2466 V <br /> JUL 1 5 1998 <br /> RECEIVED <br /> 8Ref: 8EPR-SA V JUL 2 8 1998 <br /> Mr. Jay Jones Z Div. <br /> OF M OGY LS <br /> Cyprus Climax Metals Company <br /> 1501 W. Fountainhead Parkway, Ste. 290 YVt 1-7 'f Z/ <br /> Tempe, AZ 85285 <br /> Re: Climax/Ten-Mile ESI <br /> Dear Jay: <br /> Enclosed is the Analytical Results Report for the Climax/Ten-Mile area in <br /> Colorado. Also enclosed is an informal summary of the distribution of the detections. <br /> A decision was filed in the Superfund database today, CERCLIS, which keeps the site <br /> file open based on releases to Ten-Mile Creek. <br /> I have discussed these results with our toxicologists. They indicate most <br /> concentrations in the Site Inspection and the Expanded Site Inspection are below <br /> levels which are currently believed to affect wetland communities and fish. However, <br /> risk evaluation and risk management issues may remain for several miles.downstream <br /> with respect to the aluminum. Molybdenum is currently unregulated in drinking water, <br /> but it is elevated above our background samples as far downstream of the site as Dillon <br /> Reservoir. <br /> .A summary of site information will be sent on to a team which represents diverse <br /> parts of the Superfund program, including State participants. If you have some insights <br /> regarding the aluminum in the fishery, or any other aspects of the data, which will be <br /> relevant to them, please pass them along. This team will make a recommendation to <br /> management regarding a future course and timeframe for work at this site. You may <br /> contact Barry Levene at 312-6807 for information on the timing and outcome of that <br /> effort. <br /> Deferral to existing State permit programs may be an option, if they can be <br /> protective for the issues described above. However, this will not be a recommendation <br /> from the team unless Climax is interested and the State submits a deferral agreement <br /> to the EPA. Please let me know if you need a copy of the deferral policy. <br />