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Figure B-2 also presents a group of four QR wells. Well GF -11 is an equivalent QR aquifer <br />well in the backfill. The 2017 TDS concentrations were fairly steady in backfill well GF -11 and is <br />below its peak in 2001 and 2002. Concentrations in the QR aquifer are monitored downgradient at <br />well GF -6 and have shown no influence from the upgradient mining, except for a very slight overall <br />increasing trend. These small changes are well within natural variations. Figure B-2 also presents <br />the TDS concentrations for QR wells GP -5 and GLEV-1. TDS concentrations in well GP -5 were <br />steady in 2017 while a slightly smaller concentration was observed in new well GLEV-1. <br />Figure B-3 presents the TDS concentrations for three KLM aquifer wells. The data for <br />well GP -4 is presented in red square on Figure B-3 with steady values prior to a very gradual <br />decrease in concentration during the last few years. The concentrations are overall similar to values <br />for the last several years. TDS concentrations for two of the eastern KLM wells, GP -2 and GP -8, <br />are also shown on this figure with concentrations generally between 700 and 800 mg/1. Variable <br />TDS concentrations that are overall steady have been observed in these two wells for the last several <br />years. <br />Figures B-4 presents the TDS concentrations versus time for the HI aquifer wells. The TDS <br />in HI aquifer well GF -4 had gradually increased in concentrations with time but has been fairly <br />steady for the last several years. The small changes are well within natural fluctuations in this well <br />but could be due to upgradient mining. TDS concentration in backfill well GF -5 is slightly greater <br />but is still well within the natural range for the HI aquifer. Significantly higher TDS values have <br />been observed in backfill well GF -7 with the concentrations in the last twenty years being between <br />the lower levels prior to this period and the maximum historical values from this well. TDS values <br />in this backfill aquifer will likely fluctuate until they decline to a value similar to the HI aquifer in <br />this area. <br />Trapper Mining Company 3-2 <br />2017 Annual Report <br />