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• year occurred in 1993 but a corresponding decrease in water level is not reflected in the water level data <br />recorded for Well 008-77-58. A declining response is noted in the water level data for 1993 at Well 008-79-6. <br />The typical seazonal fluctuation expected, with higher water levels in the spring and relatively lower levels in the <br />fall, is apparent in bath wells 008-77-58 and 008-79-6. Tables 6B and 76 provide period of record statistical <br />summary information for water levels at Wells 008-77-58 and 008-79-6. <br />Water Quality -Water quality data for the Wadge Overburden wells at Mine 3 is presented on Tables 6, 6A, 7, <br />and 7A. Plots of period of record total dissolved solids ('fDS) data for both wells are presented az Figures 6 and <br />7. Water quality constituent concentrations for the majority of parameters meazured during 1996 were within <br />the established ranges historically associated with each site. A single exception for well 008-79-6 is noted with <br />a new maximwn total alkalinity value recorded in September for the second year in a row. CYCC will continue <br />to monitor this pattern. <br />Sodium concentrations in well 008-79-6 continue to exceed levels prevalent at all other Mine 3 monitoring <br />locations perhaps az a result of cation exchange az ground water migrates to the greater relative depths <br />penetrated by this well. The aforementioned cation exchange phenomena was thought to be evidenced by the <br />increazes in sodiwn, bicarbonate, and SAR during the 1993 reporting period. During 1996, sodium and <br />bicarbonate concentrations were slightly elevated relative 1995 levels. SAR values were noted to have <br />increazed as well due to lower relative concentrations of calcium and magnesium. <br />• <br />In general, the total dissolved solids concentration in both wells continues to appear to have stabilized within <br />established ranges typical for each site. No anomalous values were encountered during 1996. TDS <br />concentrations in both wells remain within the normal range for the Wadge Overburden. The 1996 data does not <br />indicate any significant changes in trace metals concentrations. <br />Alluvium <br />The alluvial aquifer within the mine area is monitored with two alluvial wells (008-AV-I and 008-AV-2) <br />completed in the Foidel Creek alluvium approximately 1000 feet upgradient from the confluence of Foidel and <br />Middle Creeks (see Figure 2). Both wells are completed to the baze of the alluvium, about 14 feet below the <br />land surface. <br />Water Levels - A plot oFhistoric water levels in the two Foidel Creek Alluvial wells and in Foidel Creek az <br />meazured at site 304 is presented as Figure 8. The water levels in the wells and stream show the expected <br />typical seazonal interrelationship of relatively rapid increases and declines azsociated with spring runoff. This <br />seasonal variation at these sites is more pronounced here than in other wells az expected because of the shallow <br />depths involved and proximity to Foidel Creek. The longer terra trends in water levels at these sites generally <br />• parallel the fluctuations observed in annual streamflows. Tables 4B and SB provide period of record statistical <br />-3- <br />