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Figure B -7 presents the TDS concentrations versus time for alluvial wells GC -3, P -1, J -1 and <br />COY. TDS concentrations in Pyeatt alluvial well P -1 were variable in 2014 similar to historical <br />level. <br />The TDS concentrations in alluvial ground water in Johnson Gulch (J -1) have been fairly <br />steady since 2000. The recent Johnson Gulch alluvial ground water is within the natural range for <br />TDS in this aquifer. These TDS values and variations are very similar to the natural values and <br />variations observed in Flume Gulch alluvial well, COY. <br />Flume Gulch has two alluvial monitoring wells, GC -3 and COY. TDS concentrations overall <br />have been steady in well GC -3 with variations observed the last four years similar to previous values. <br />The 2014 TDS concentrations in the COY well were similar to higher values in well GC -3. The <br />TDS concentrations in the COY well and historical variations in well P -1 show that the Johnson <br />alluvial TDS concentrations are within natural alluvial concentrations in the alluvial aquifers in this <br />3.2 SULFATE <br />Figure B -8 presents the sulfate concentrations for QR wells GD -2 and GD -3. Sulfate in <br />backfill well GD -3 were steady between 2000 and 2009 and then overall increased during the last <br />few years prior to a small decline in 2014. Sulfate concentrations in well GD -3 had been fairly steady <br />prior to the change in the last few years. This indicates that the sulfate fluctuations in the backfill <br />aquifer may be larger than the native QR aquifer. Future monitoring of this well will define whether <br />sulfate concentrations will increase in the backfill aquifer when water levels rise to a higher level in <br />the backfill material. Concentrations in well GD -2 had overall gradually increased the last few years <br />but declined in 2006 and 2007 prior to a larger increase in 2008 through 2014. The recent sulfate <br />Trapper Mining Company 34 <br />2014 Annual Report <br />