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V <br /> in TDS that occurred in well GD-2 in 1998 is shown by the two analyses in 1999 to be an <br /> outlier. The TDS in well GE-1 decreased in 1999, which is supported by a similar decline in <br /> the sulfate concentrations. The decline is also supported by a decline in the sum of the <br /> major constituents. The higher concentrations could be due to upgradient QR mining, but <br /> also is within natural fluctuations. <br /> Figure B-3 also presents a group of five QR wells. Well GF-11 is an equivalent <br /> backfill monitor well. An overall increasing trend in TDS has occurred in backfill well GF-11 <br /> over the last twelve years with short-term declining trends observed within this long <br /> period. The concentration in this backfill aquifer was greater in 1999 than previously <br /> observed values except for one value in 1998. Concentrations in the QR aquifer are <br /> monitored downgradient at well GF-6 and have shown no influence from the upgradient <br /> mining, except for a very slight overall increasing trend. These small changes are well • <br /> within natural variations. Figure B-3 also presents the TDS concentrations for QR wells GP- <br /> 5 and GP-6. Well GP-6 is upgradient of well GP-5, and, as expected, contains a slightly <br /> lower TDS than downgradient well GP-5. These two wells have also demonstrated a <br /> similar overall slight increasing trend, with the exception of the last three years in well GP- <br /> 6. The TDS in the QR aquifer in the east portion of the Trapper Mine at well GP-1 has <br /> been fairly steady for the last several years. <br /> Figure B-4 presents the TDS concentrations for four KLM aquifer wells. Well GF- <br /> 3 is shown with blue dots and TDS values indicate a very gradual increasing trend in TDS <br /> in the last two years after four years of an overall decreasing trend. This change in TDS is <br /> well within the natural fluctuation in TDS in the KLM aquifer. The data for well GP-4 is <br /> presented in green on Figure B-4 and shows similar TDS concentrations for the last three <br /> 3-2 <br />