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concentrations observed in 2003 are within the natural range of this constituent at Trapper <br />Mine. <br />All of the 2003 NQ3 values were below the drinking water standard of 10 mg/I, <br />except for one high value in wel! P-3. Well P-3 has historically contained similar nihate <br />concentrations prior to any mining in this area. <br />3.5 OTHER CONSTITUENTS <br />The major constituerrts other than calcium and magnesium are presented on pages <br />8-97 through &137. An overall decrease in the caldum and magnesium wnoentrations has <br />been observed since 1985 for wells GB-5 and GE-2 with present concentrations being very <br />smaA. Dedines in sodium concentrations at well GF7 occurred from 1989 to 1996 with <br />slightly higher values the last sbc years. Sodium concentrations are much smaller in bacidill <br />well GFll. The SAR values observed in 2003 in water in the Trapper wells were very <br />similar to recently observed and natural values at Trapper Mine. None of the 2003 SAR <br />values indicate a significant trend in this parameter. <br />The heavy metals with a "t" subscript by their symbol represent total measurements, <br />while the others are disrobed concentrations. The "tr' subscript for iron indicates total <br />recoverable iron. Disrobed and total concentrations are similar for most of the heavy <br />metals, except for iron concentrations in some welts where the total values are significantly <br />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 trends <br />3-11 <br />