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values increased slightly, and calculated SAR values remained essentially static in the spring and decreased <br />in the fall. <br />In general, the total dissolved solids concentration in both wells appears to have stabilized within established <br />ranges typical for each site. No anomalous values were encountered during 1994. TDS concentrations in <br />both wells remain within the normal range for the \Vadge Overburden. The 1994 data does not indicate any <br />significant changes in trace metals concentrations. <br />Alluvium <br />The alluvial ayuifer within the mine area is monitored with two alluvial wells (008-AV-I attd 008-AV-2) <br />completed itt the Foidel Creek alluvium approximately 1000 feet upgradient from the confluence of Foidel <br />and Middle Creeks (see Figure 2). Both wells are completed to the base of the alluvium, about 14 feet <br />below the land surface. <br />Water Levels - A plot of historic water levels in the two Foidel Creek Alluvial wells and in Foidel Creek <br />as measured at site 304 is presented as Figure 8. The water levels in the wells and stream show the expected <br />typical seasonal interrelationship of relatively rapid increases and declines associated with spring runoff. <br />Tltis seasonal variation at these sites is more pronounced here than itt other wells as expected because of the <br />• shallow dcptlts involved and proximity to Foidel Creek. The longer term trends in water levels at these sites <br />generally parallel [he tluctuations observed in annual streamtlows. <br />Water quality -Water quality data for the Foidel Creek Alluvium wells is presented on Tables 4, 4a, 5, and <br />Sa. Water quality data for Foidel Creek Site 304 monitored in association with the alluvial wells is <br />presented ott Tables 1 I and I la. Plots of historic field conductivities for both wells and dissolved solids for <br />well 008-AV-2 are presented as Figures 9, 10, and 11. Water quality constituent concentrations for most <br />parameters monitored during 1994 were within the established ranges historically associated with each site. <br />Exceptions noted during 1994 include an unusually low pH value measured at well 008-AV-1 in August and <br />a relatively high field conductivity measured at well 008-AV-2 in May. A relatively low pH value, within <br />the previously established range, was also noted at well 008-AV-2 during August. Both alluvial wells <br />returned pH values within the normal range during the subsequent visit in September. Conductivity values <br />at well 008-AV-2 also returned to normal following May's measurement. Seasonal variations in field <br />conductivity are evident in the alluvial wells. This is likely associated with the Flushing effect of the <br />relatively low dissolved solids surface water recharging the alluvial aquifer during spring runoff. The total <br />dissolved solids concentration in the Foidel Creek alluvial aquifer appears to be steadily increasing since <br />approximately 1988 (see Figure l l). CYCC will continue to monitor the direction of this trend. <br />• The 1994 data does not indicate any significant changes in trace metals concentrations although iron and <br />manganese values remain extremely variable. Manganese concentrations during 1994 in well 008-AV-2 <br />remained elevated during those sampling instances when water levels were low. The 1993 AHR suggested <br />-3- <br />