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B - INn~er Surface water chemistry was observed to be stable over the 17 year monitoring period (Table B-1 and Appendix Bl). The water may be classified as a mixed calcium/magnesium-sulfate bicarbonate type water (see trilinear diagrams in Appendix Bl). The degree of ionization varied with season, being highest during low flow and lowest during high flow. The ratio of calcium to magnesium was generally consistent over the seasons; however, there is a shift in the ratio of sulfate to bicarbonate, with bicarbonate being more prevalent during high flow conditions. These ionic conditions also influenced the conductivity and TDS as exhibited in the graphs in Appendix Bl. Analysis of trace metals indicates ]ow concentrations. Aluminum and iron were detected in all samplings, higher values being reported during high flow events (Appendix Bl). Manganese and zinc were also sampled and found in only trace amounts. Mining and reclamation operations at the Chimney Rock Mine, appear to have little or no effect on the quantity or quality of area surface waters. This may be due to the mines inactive status during 1985 tluough 1989. Backfill and grading activities occurred in the Revision 1 Pit and Surface facilities during 1990 and 1991; however, sediment control ponds established on the disturbed areas eliminated runoff of surface waters from the mice site. These ponds were removed in the fall of 1997 following Phase II release. The NPDES permit for the mine was also terminated eliminating the need for quarterly reporting. GROUNDWATER The five alluvial wells A-1, A-2, A-3, W-I and W-5 were replaced and added to the monitoring program in 1993. Water levels were measured during [he quarterly samplings with water chemistry being analyzed during the second and fourth quarters. All data is contained in Appendix B2. Water levels in all wells varied seasonally. The spring season showed higher alluvial water levels than normal. All wells had water over the entire monitoring period. Water quality was analyzed from well A-1. The water is considered a mixed ion calcium/magnesium- sulfate/bicarbonate type (see triligear diagrams in Appendix B2). Historically, well A-I has a ]ugher ion concentration than well W-5 as exhibited by the values of conductivity, TDS, and cation/anion analysis. Sodium and magnesiwn concentrations were also higher in well A-1. Water quality analyses conducted over the monitoring period were consistent with a slight rise in TDS over the period. RECOMMENDATIONS Water quality appears to be stable in the alluvium and surface waters in the area of the mine distw-bance as indicated from 17 years of monitoring. Kaiser hereby requests that the hydrologic monitoring requirement for the mine be eliminated. 053-Chimney Rock_PH3BOND_2003_(lan_2Z04) $-3