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years being between the lower levels prior to this period and the maximum historical values from <br />this well. One of the two values in 2005 for TDS was lower while the second value was very similar <br />to recent concentrations. TDS values in this backfill aquifer will likely fluctuate until they decline to <br />a value similaz to the HI aquifer in this area. <br />Wells GMP-1 and GP-3 are two HI aquifer wells north of the A pit. A similar value in TDS <br />was observed in well GMP-1 during the first half of 2005 with a large decline in the second value. <br />This well is immediately downgradient of the reclaimed A pit and is likely showing fluctuations <br />from the backfill aquifer. The TDS values and fluctuations in well GMP-1 are similar to those in <br />well GC-1, which had to be natural until mining reached this area the last few years. The overall <br />TDS concentrations in well GC-1 had declined for the last few yeazs but the 2005 values show a <br />significant increase. Additional monitoring with time is needed to determine if this increase is a <br />significant trend. TDS concentrations in HI aquifer well GP-3, further downgradient of well GMP-1, <br />have overall been steady for the period of observation. TDS concentrations in eastern wells have <br />varied, showing that TDS varies naturally over a lazge range in this aquifer. Fluctuations observed in <br />wells GC-1 and GP-7 except for the last few years must be natural due to their location. <br />Figure B-6 presents the TDS for 3rd White Sandstone wells GC-2, GP-9, P-8 and 81-03A. <br />Concentrations in each of these wells have been fairly steady for the last few years. The TDS for the <br />last eight yeazs for well P-8 shows fairly steady concentrarions aRer a lazge increase over the <br />previous three years to a value of approximately 4000 mg4. The increase in well P-8 is above the <br />levels expected for the 3rd White Sandstone and is likely due to the upgradient mining based on the <br />timing and magnitude of the increase. However, some of this higher level could be natural based on <br />Trapper Mining Company <br />2005 Annual Report <br />