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' ~c <br />ti <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 />R and 9. Seasonal variation is evident in the wells. This is apparently <br />clue to flushing effect of the relatively low dissolved solids surface water <br />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 <br />' conductivity of 2117 mmhos/cm at Station 900: The conductivity of the water <br />in the two alluvial wells increased in water year 1987; however, the <br />' dissolved solids in well 008-AV-2 (dissolved solids not measured in well <br />008-AV-1) did not increase. The increase was not large and may be due to an <br />increase in the sulfate portion at the anions. Where the dissolved solids <br />are elevated the sulphate, sodium and the SAR are elevated. The data does <br />not indicate any significant changes in the trace metals concentrations. <br />1 <br />Spoils <br />Two wells in the spoils are monitored. They are located in the Mine 3 <br />' Spoils and were installed in 1985. One spo11~ well, 008-SP-4A has been dry <br />since it was installed. <br />Water Levels - The plot of the historic water levels in spoil well 008-SP-5A <br />is presented on Figure 10. The water level has a similar pattern to that of <br />tl~e alluvial wells: it responds rapidly to the spring runoff and then <br />declines rapidly in the summer. <br />' ~.~ <br />Water Quality - The water quality data i~ summarized in Tables 12 and 13 for <br />the spoil well. Tlie historic dissolved solids concentrations for the well <br />is plotted on Figure 11. The dissolved solids average-3056 for the period <br />of record. However they have been so ((variable that it ,is impossible to <br />' establish a trend. The water is a\calcium-sulfate type with high <br />hicarbonate 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 /> <br />' - 3 - <br />