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~tt\~Qtl ~i III IIIIIIIIIIIII III STATE OF COLORADO ,~ Roy Romer, Governor Patti Shwayder, Executive Director Dedicated to protecting and improving the health and environment of the people of Colorado 4300 Cherry Creek Dr. 5. laboratory and Radiation Services Division Denver, Colorado 80246.1530 8100 Lowry Blvd. Phone (303) 692-2000 Denver CO 80 2 2 0-692 9 Located in Glendale, Colorado 003) 692-3090 http: //svsrv.cdphe.sta te.co.us November 10, 1997 RECEIVED NOV ~ g ~ggy Division of twmerals ~ Geology Mr. John Hardaway Manager of Environmental Affairs Cripple Creek and Victor Gold Mining Company P.O. Box 191 Victor, CO 80860 Re: CDPS Permit No. CO-0045225 -Points 002A, 003A, 004A Infiltration Rates Dear Mr. Hazdaway; v r:o~ .~ 0 `4~ •`/ s rare Colorado Department of Public Health and Environment We have received a variety of comments related to the above-referenced permit. I am currently in the process of stunmarizing those comments, performing additional analyses that will address some of the concerns that have been raised, and preparing responses to the comments that will then be incorporated into the permit rationale. One very important issue that has been raised in the comments, and which I needed to contact you about anyway, is the rate of infiltration that is likely to occur within the ponds located at points 002A, 003A and 004A. And, what may or may not be a sepazate issue depending upon the geologic setting, is the infiltration rates expected to occur within the catchment azeas draining into these ponds. As part of our settlement discussions, it was the Division's understanding that CC&V would be providing some estimates of infiltration rates, at least within each of the settling ponds at issue. We have not yet received this information. At this point is time, it is important that we aze provided with some indication of the infiltration rates that aze likely to occur, at least within the settling ponds. Data supporting CC&V's estimates of runoff volumes, as required to be collected by the permit itself, would also be helpful.