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years. fie TDS in HI aquifer well GF-4 has gradually increased in concentrations with time. <br />The small changes are well within natural fluctuations in these two wells but could be due <br />to upgradient mining. TDS concentration in baddill well GF5 is slightly greater but is still <br />well within the nature) range for the HI aquifer. Significantly higher TDS values have been <br />observed in bactditl well GF7 with the concentrations in the last sa years being between <br />the lower levels in the previous two years and the maximum historical values from this well. <br />TDS values in this backfill aquifer will likely fluctuate until they decline to a value similar to <br />the HI aquifer in this area. <br />Wells GMP-1 and GP-3 are two HI aquifer wells north of the A pit An overall <br />increasing trend in TDS has been observed in well GMP-1 during the last four years with <br />large variations in this well historically. This well is immediately downgradient of the <br />reclaimed A pit and is likely showing fluctuations from the bacldill aquifer. The TDS values <br />and fluctuations in well GMP-1 are similar to those in well GC-1, which had to be natural <br />until mining reached this area the last few years. The TDS concentrations in well GC-1 <br />declined in 2003. TDS concentrations in HI aquifer well GP-3, further downgradient, have <br />overall been steady for the period of observation. TDS concentrations in eastern we!!s have <br />varied, showing that TDS varies naturally over a large range in this aquifer. Fluctuations <br />observed in wells GC-i and GP-7 except for the last few years must be natural due to their <br />location. <br />Figure B-7 presents the TDS for 3rd White Sandstone wells G8-2, GC-2, GP-9, P-8 <br />and 81-03A. Concentrations in each of these wells have been fairly steady for the last few <br />years. The TDS for the last sa years for well P-8 shows fairly steady concentrations after a <br />. large increase over the previous three years to a value of approximately 4000 mg/I. The <br />3-3 <br />