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<br />Figure B-5 presents the conductivity data for well GC1. <br />Concentrations have been very steady from this well in :L989 13nd <br />i <br />1990. with the 1992 value slightly less. Figure B-6 shows some <br />i <br />scatter in the conductivity data taken from well GC2. These <br />changes in r_ondur_tivity are natural and shows a Gradual der_rease in <br />conductivity the last few years. Figure B-7 presents the <br />conductivity versus time plot for well GC3. A fair amountlof <br />scatter is seen o^, the _p1ot, b~.it sn increase in valuers was s?en <br />from 1994 to 1986. with fairly sta'ole values .3rter the rise. 911 <br />r_hanges in the aquifers at the GC site are natural due to the <br />distance from .active mining'. <br />We11 GD1 is a Twenty Mile Sandstone we 11 ar_d has been userl~as <br />the potable water supply well for tha mine and the power plant • <br />I <br />since 1985. The increase of water use has resulted in the hia?ier <br />conductivities since 1985 shown on Ei~ure B•-8. The 1989 throah <br />1992 values have fluctuated. with a mean near 900 umhos/cm, but no <br />trend has developed. <br />Figure B-9 ~ <br />presents the field conductivity data for well GD_. <br />Conrl~activities for well GD2 have remained fairly steady the list <br />nine years except for the latest value which is significantly <br />I <br />smaller. The backfill well GD3 has been fairly steady with fan <br />3ver.age of 1700 umhos/cm. Figure B-10 presents the fiend <br />conductivity data for well GD3. The minim upgradient of well GP2 <br />''nas not affected conductivities in this area of the Oft aquif=_~ <br />Any changes are thought to be within the range of ..^.atur~al <br />flur_tuations. <br />3-'Z <br />