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• most WQ parameters returned to high concentrations similar to late 1993 and early <br />1994 WQ. No significant trend in WQ was noted in 2001 to indicate continued mining <br />effects or a return to historical WQ. Chloride and fluoride results indicate a slightly <br />downward trend. <br />No trend or significant water quality change was noted for the Perched, A-Groove and B- <br />Groove monitoring well aquifers. For example, see Figure 6-5 for conductivity results of B- <br />Groove well (89-1). Conductivity results from the B-Groove are consistent, similar to other <br />WQ parameters through this period of record. Late in November of 1994 WQ effects were <br />noted in the A-Groove water well (90-1), which supplies the plant with raw water. <br />Significant changes in WQ were confirmed for the water well in December 1994. See <br />• Figure 6-6 for alkalinity, conductivity, and chloride results from the water well. Mine water <br />effects on WQ of the water well peaked early in 1995. From 1995-1997 water years, WQ <br />effects noted in the water well decreased significantly. Minor but continual improvement of <br />WQ was noted from 1997 - 2001. <br />Water level (WL) data from baseline condition prior to pumpage or injection indicated four <br />distinct zones. Figure 6-7 illustrates period of record for down dip wells. Pumping from <br />WRN's water well 90-1, completed in the A-Groove, began in May 1990 and affected WL of <br />primarily the A-Groove and to a lesser degree the B-Groove aquifer. Raw water <br />• 47 <br />