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rnrroductiort <br />On January 30, 1986, the CMLRD approved a Technical Revision to reduce the hydrologic <br />monitoring program at the site. Stations associated with the Revision Area No. 2 in Deep Creek <br />(DC-1, W-17 and W-18) are not required to be monitored by the current program. The water <br />quality parameters of arsenic, cadmium, lead, mercury, molybdenum and selenium have also <br />been eliminated from all stations except well W-161ocated in the reclaimed area of the east pit. <br />Water quality sampling of the Stollsteimer Creek alluvium was added to station A-1 and <br />-I eliminated from station W-1. Frequettcy of sampling, depth-to-water measurements, and stream <br />discharge measurements were not changed by this revision. In June 1988, the CMLRD approved <br />a technical revision to conduct this monitoring program on a quarterly basis and in May 1990, <br />a technical revision was approved which eliminated all groundwater monitoring at the site. In <br />January 1992, the CMLRD approved a reduction in surface water sampling to quarterly flow <br />measurements and semiannual water quality at three surface stations. In early 1993, a decision <br />7 was made to resume alluvial aquifer monitoring and in late summer wells A-1, W-1 and W-5 <br />were reinstalled for the purposes of this monitoring. Groundwater in bedrock aquifers were not <br />resumed and an analysis of the probable hydrologic consequences of potential mining impacts <br />is presented in this report (Appendix Imo. <br />The following sections of this report describe the methods and results of this revised program <br />conducted at the Chimney Rock Mine site during 1994. Also contained in this report is a <br />comparison of the data collected over the 1985 through 1994 period and recommendations for <br />future monitoring. <br />1 <br />' R?.OSIp/01 ?7~95(1:16pm) 3 <br />