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• very small. Declines in sodium concentrations at well GF-7 occurred from 1989 to 1996 <br />with slightly higher values the fast four years. Sodium concentrations are much smaller in <br />backfill well GF-11. The SAR values observed in 2000 in water in the Trapper wells was <br />very similar to recently observed and natural values at Trapper Mine. None of the 2000 <br />SAR values indicate a significant trend in this parameter. <br />The heavy metals with a "t" subscript by their symbol represent total <br />measurements, while the others are dissolved concentrations. Dissolved and total <br />concentrations are similar for most of the heavy metals, except for iron concentrations in <br />some wells where the total values are significantly greater. <br />Iron concentrations have varied over large ranges near the mine pits and at distant <br />wells but no consistent trends have been observed. Levels of aluminum, barium, boron, <br />• phosphate and manganese have also varied over significant ranges but no consistent <br />trends have been observed. Arsenic, cadmium, chromium, copper and lead concentrations <br />have been low with a few exceptions. Copper concentrations in wells GB-5 and GE-3 have <br />been higher mainly prior to mining. Early on, a few elevated lead concentrations were also <br />observed in wells GE-1 and GE-2. Molybdenum, nickel, selenium and vanadium <br />concentrations have stayed low, except for a slightly higher selenium value in well P-3. <br />The recent radium 226 values have been low. <br />Based on field conductivity, TDS and DSSUM, the laboratory conductivities for the <br />second 2000 sample for wells GB-5, GF-2, GF-5, GF-6, GF-7, GF-11, GP-5 and P-8 are in <br />error and should not be used. <br /> <br />3-li <br />