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, <br />... -; <br /> <br />Gulch/Bateman Creek monitoring wells. The most recent samples were <br />indicated to have been taken in November 1996; the earliest samples <br />in March 1992. Some ground water quality data from drill holes, ie. <br />four of them, in Arequa Gulch were provided in Table 3 of Appendix <br />B.3 of Amendment 6. <br />In regard to the focus or direction of the technical revision to be <br />submitted by August 1, 1997, the Division would expect that in <br />support of its proposed numeric protection levels and Points of <br />Compliance for groundwater in the area of the mine, excluding <br />Arequa Gulch for the moment, CC&V would not only include all <br />groundwater quality and depth data for the Wilson Creek/Bateman <br />Creek drainage but also such data for the Squaw Gulch area and its <br />tributary drainages as well as the general Ironclad-Globe Hill area <br />of the mine, including the Moffat Tunnel. Although CC&V has wells <br />listed with the Office of the State Engineer in the more northern <br />areas of the mine, ie. in Sections 18 and 19, Twp 15 South, Rg 69 <br />West, the Division appears not to have complete groundwater quality <br />or groundwater depth data for these wells or for this general area <br />of the mine. The Division also would expect CC&V to include with <br />the information provided any additional groundwater quality and/or <br />depth data gathered from exploratory drill holes within the Cresson <br />Mine as well as the dates and location of such sampling in order <br />not only to provide the most accurate representation of the <br />groundwater regime in the area of the mine but also to assist in <br />demonstrating the mine's potential, or lack thereof in certain <br />areas, for adverse impacts on local groundwater of possible <br />beneficial quality. <br />Hopefully, the above will assist you in responding to the <br />Division's May 1, 1997 letter. If you have any further questions, <br />please contact Berhan Keffelew, im Stevens or me. <br />Sincerely, , <br />'~^~ <br />H. Bruce Humphries <br />Supervisor, Minerals Program <br />97N037 <br />