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Figure B-11 presents a fairly steady plot of conductivities <br />for well GE1, except for 1990 and 1991 Where there is some <br />variability in the data. A gradual overall increase in <br />conductivity seems to be occurring at wells GE1 and GE2 (Figures B- <br />11 and B-12). Well GE3 shows considerable scatter in <br />concentrations since 1985. No apparent trend exists (see Fig. B- <br />13). This well is more susceptible to changes because these <br />sandstone aquifers are shallower. A greater natural variation in <br />the conductivities for well GE3 is expected. Changes in the field <br />conductivities for aquifers monitored at the GE site are not <br />thought to be caused by any mining activities from Trapper Mine. <br />Mining on the west side of the Trapper Mine permit area was <br />re-started in 1988. <br />Twenty Mile Sandstone well GF1 and U aquifer well GF2 have <br />shown very little change in field conductivity during the period <br />presented (1983 through 1991) in Figures B-14 and B-15. <br />Concentration plots with less scatter are expected from these <br />deeper aquifers. Eigures• B-18 and B-17 present the field <br />conductivity versus time plots for wells GF3 and GE4. Each plot <br />shows no ma3or trends in data to 1986 with a slight rise in values <br />since 1986. This slight rise is still within natural fluctuations. <br />The backfill aquifer in the Ashmore Pit area is monitored by <br />well GF5. Figure B-18 shows that conductivities for well GF5 have <br />been fairly stable since 1984. Figure B-19 presents the <br />conductivity versus time plot for well GF6. A slight increase in <br />., conductivity seems to be occurring but it is within the expected <br />3-3 <br />