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<br /> Water Quality - Tfre water qua]ity 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 we7Ts are plotted on Figures <br />' 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 /> which recharges tfre alluvial aquifers during spring runoff. The water <br />' quality of Foidel Creek alluvial wel ls is probably effected by the <br /> relatively high salt content of tfre Foidel Creek water which haci a high <br />' conductivity of 3120 mmhos/cm at Station 900 in 1988. The conductivity of <br /> the water in ttre two alluvial wells did not increase in 1988. Neither did <br />' the dissolved solids in well 008-AV-7.. The data does not indicate any <br /> significant changes in the trace metals concentrations. <br /> <br /> Spoils <br /> 3 <br />l <br />M <br /> Two wells in the spoils are monitored. ocated in the <br />ine <br />They are <br /> spoils and were installed irr 1985. One spoil well, 008-SP-4A Iras been dry <br />' since it was installed. <br />lJater 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 />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 3218 for the period <br />of record. However they have been so variable that it is difficult to <br />establish a trend. The data indicate a possible increase in the dissolved <br />solids concentration at the end of 988; however, more data is needed to <br />establish if the increase is the start of an upward trend. The water is a <br />calcium sulfate type with high bicarbonate and relatively low SAR. The <br />water is higher in dissolved solids than the hackground bedrocY, levels and <br />the spoil spring discharges. The data does not indicate any signiFicant.ly <br />high trace metals concentrations except for relatively high dissolved <br />' manganese and slightly elevated dissolved cadmium. J` <br />I 1 <br />- 4 - <br />