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• that the above values for wells 17-B and 95-1 were aberrant concentrations. This water <br />year, iron wncentrations in all wells were consistently low. <br />Magnesium <br />Magnesium concentration levels in all groundwater monitoring wells remained within <br />historic values during this water year. Well 17-B shows the least overall variability for <br />magnesium values of the three wells, ranging from 5.7 to 19.0 mglL over the past nine <br />yeazs. We1194-1 showed the widest range in values, ranging from 22.4 mg/L (W.Y. 1997) <br />to 128.0 mg/L (W.Y. 1995). Over the last three water years, the range in concentrations <br />for we1194-1 has attenuated ranging between 63 and 84 mg/L. Magnesium values for well <br />95-1 were intermediate between wells 17-B and 94-1. Wells 94-1 and 95-1 show a slight <br />overall decrease in concentrations over the past nine water years. <br />Manganese <br />Manganese concentrations in all wells over the period of record remain low, though wells <br />94-1 and 95-1 reveal lazger fluctuations than well 17-B. During December 2002, wells <br />94-1 and 95-1 showed concentrations slightly above their respective historic ranges. <br />Sodium <br />•, Sodium concentrations within all wells remained within historic ranges this water year. <br />Wells 17-B and 94-1 show significant variability in the range of sodium values, while well <br />95-1 shows minimal concentration variability over the past nine water years. <br />Sulfate <br />Sulfate concentrations vary widely within and between the wells. Well 17-B has had <br />consistently tow sulfate levels throughout the past nine water yeazs. Well 94-1 reveals a <br />wide range of sulfate concentrations ranging from 42 mg/L (W.Y 1999) to 680 mg/L <br />(W.Y. 1995). Concentration fluctuations have attenuated over the past four water years, <br />remaining in the 205-360 mg/L range. Well 95-1 illustrated wide initial fluctuations in <br />sulfate concentrations (W.Y. 1997-1998) with subsequent water years revealing no <br />detectable sulfate concentrations. <br />Trace Elements <br />Many of the trace elements found to be below the detection limits for the springs sampled <br />were also found to be below detection limits for the wells sampled. These trace elements <br />are arsenic, cadmium, carbonate, mercury, nitrite, nitrate, nitrate/nitrite, total phosphate, <br />selenium, and zinc. Other trace elements found at detectable limits are consistent within <br />each well at levels that do not indicate high or low fluctuations of these elements. Overall, <br />Cae4ai Junctkn Mine Paga 11 <br />Annual Hydrokgk 2epore4or Water Year 2003 <br />