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i <br /> Water Quality - The water quality data is summarized in Tables 8 through 11 <br /> for the Foidel Creek alluvial wells. The historic dissolved solids <br /> concentrations and field conductivity for these wells are plotted on Figures <br /> i 8 and 9. Seasonal variation is evident in the wells. This is apparently <br /> due to flushing effect of the relatively low dissolved solids surface water <br /> i which recharges the alluvial aquifers during spring runoff. The water <br /> quality of Foidel Creek alluvial wells is probably effected by the <br /> relatively high salt content of the Foidel Creek water which had a high <br /> iconductivity of 3410 mmhos/cm at Station 900 in 1989. The conductivity of <br /> the water in the two alluvial wells did not increas in 1988, however, the <br /> i dissolved solids in Well 008-AV-2 did increase. This was probably due to <br /> the very low stream flows in the summer of 1989. The data does not include <br /> any significant changes in the trace metals concentrations. <br /> Spoils <br /> 1 <br /> Two wells in the spoils are monitored. They are located in the Mine 3 <br /> ispoils and were installed in 1985. One spoil well , 008-SP-4A has been dry <br /> since it was installed. <br /> iWater Levels - The plot of the historic water levels in spoil well 008-SP-5A <br /> i is presented on Figure 10. The water level has a similar pattern to that of <br /> the alluvial wells: it responds rapidly to the spring runoff and then <br /> declines rapidly in the summer. <br /> Water Quality - The water quality data is summarized in Tables 12 and 13 for <br /> ' the spoil well. The historic dissolved solids concentrations for the well <br /> is plotted on Figure 11. The dissolved solids average 3351 for the period <br /> ' of record. While highly variable, the dissolved solids concentration does <br /> not appear to be increasing. The water is a calcium-sulfate type with high <br /> i bicarbonate and relatively low SAR. The water is higher in dissolved solids <br /> than the background bedrock levels and the spoil spring discharges. The <br /> data does not indicate any significantly high trace metals concentrations <br /> except for relatively high dissolved manganese and slightly elevated <br /> dissolved cadmium. <br /> 1 <br /> i - 4 - <br />