Laserfiche WebLink
• Figures B-5 and B-6 present the TDS concentrations versus time for the HI aquifer <br />wells. The TDS concentrations in HI well GB-5 have been low and steady for the last three <br />years. The TDS in HI aquifer wells GE-2 and GF-4 has gradualty increased in <br />concentrations during the last thirteen years. The small increases are well within natural <br />fluctuations in this aquifer. TDS concentration in backfill well GF-5 is slightly greater but is <br />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 three years being <br />between the lower levels in the previous two years and the maximum historical values <br />from this well. TDS values in this backfill aquifer will likely fluctuate until they decline to a <br />value similar to the HI aquifer in this area. Wells GMP-1 and GP-3 are two HI aquifer wells <br />north of the A pit. An overall decreasing trend in TDS has been observed in well GMP-1 for <br />• the last four years. This well is immediately downgradient of the reclaimed A pit and is <br />likely showing fluctuations from the backfill aquifer. The TDS values and fluduations in <br />well GMP-1 are similar to those in well GC-1, which have to be natural. lUS <br />concentrations in HI aquifer well GP-3, further downgradient, have overall been steady for <br />the period of observation. TDS concentrations in eastern wells have varied, showing that <br />TDS varies naturally over a large range in this aquifer. Fluctuations observed in wells GC-i <br />and GP-7 must be natural due to their location. <br />Figure B-7 presents the TDS for 3rd White Sandstone wells GB-2, GC-2, GP-9, P-8 <br />and 81-03A. Concentrations in each of these wells have been fairly steady for the last <br />several years with the exception of well P-8. The 2000 data for well P-8 shows fairly <br />steady concentrations for the fast three years after a large increase over the previous three <br />years to a value of approximately 4000 mg/I. The. increase in well P-8 is above the levels <br />3-3 <br />