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<br /> <br />being drained from the QR aquifer in this area. Mining is very close to this well and t <br />TDS values may be a function of the mining activities in this area. An overall gradually <br />increasing concentration in well GD-3 occurred from 1989 through 1994. The TDS for the <br />last couple of years seems to have reached a fairly constant level in well GD-3. They TDS <br />in this backfill aquifer is greater than it is downgradient in the R Coal at GD-2. A small <br />gradual increase in TDS existed over the last three years in well GD-2. This change in <br />value is too small to determine whether it is natural or is caused by upgradient mining. <br />Figure B-3 also presents a group of five QR wells. Well GF-11 is an equivalent backfill <br />monitor wells. A gradual decreasing trend currently exists in backfill well GF-11. This plot <br />indicates that the maximum concentration in this backfill aquifer may have been obtained <br />in 1994 and 1995. Concentrations in the QR aquifer are monitored downgradient at well <br />GF-6 and has shown no influence from the upgradient mining. Figure B-3 also presents the <br />TDS concentrations for QR wells GP-5 and GP-6. Well GP-6 is upgradient of well GP-5 <br />and contains a slightly lower TDS than downgradient in well GP-5, as expected. The TDS <br />in the QR aquifer in the east portion of the Trapper Mine at well GP-1 has been fairly steady <br />for the last several years. <br />Figure B-4 presents the TDS concentrations for five KLM aquifer wells. Well GA- <br />2 values are shown as a solid blue dot and was not been sampled in 1995 or 1996 due to <br />the fact that the well has gone dry. Well GF-3 is shown with red squares and TDS values <br />indicate a very gradual increasing trend in TDS over time. This change in TDS is well <br />within the natural fluctuation in TDS in the KLM aquifer. The data for well GP-4 is <br />presented in magenta on Figure B-4 and shows a fairly steady TDS concentration for the <br />last several years with the exception of one high outlier. TDS concentrations for two of the <br />3-2 <br />