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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 2006 TDS concentrations overall decreased in backfill well GF -11 and is <br />still below its peak in 2001 and 2002. Concentrations in the QR aquifer are monitored <br />downgradient at well GF -6 and have shown no influence from the upgradient mining, except for a <br />very slight overall increasing trend. The second half of 2006 value increased but needs additional <br />monitoring with time to determine if this change is significant. These small changes are well within <br />natural variations. Figure B -2 also presents the TDS concentrations for QR wells GP -5 and GP -6. <br />Well GP -6 is upgradient of well GP -5, and, as expected, contains a slightly lower TDS than <br />downgradient well GP -5. TDS concentrations in these two wells were steady in 2006 except for an <br />increase in the second half value. Water levels in these two wells have also demonstrated a similar <br />overall slight increasing trend over portions of their historical records which are likely natural. <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 a higher value in the first half of 2006 and <br />a value similar to recent levels in the second half. The concentrations have overall similar values <br />for the last several years except for the higher TDS in 2006. TDS concentrations for two of the <br />eastern KLM wells, GP -2 and GP -8, are also shown on this figure with concentrations generally <br />between 700 and 800 mg/1 except for a large TDS in GP -2 for the second half of 2006. Variable <br />TDS concentrations that are overall steady have been observed in these two wells for the last few <br />years. <br />Figures B-4 and B -5 present the TDS concentrations versus time for the HI aquifer wells. <br />Fairly steady concentrations have been observed in the TDS in well GE -2 during the last four years <br />with a very gradual decline. The TDS in HI aquifer well GF-4 had gradually increased in <br />Trapper Mining Company 3-2 <br />2006 Annual Report <br />