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3.0 GROUND-WATER QUALITY <br /> Appendix B presents the ground-water quality data for Trapper <br /> Mine. Table B-1 tabulates the available ground-water quality data <br /> for Trapper monitoring wells. Field conductivity was selected as <br /> the parameter to discuss trends of major constituents. <br /> 3. 1 FIELD CONDUCTIVITY <br /> The 1988 Annual Hydrologic Report included TDS and field <br /> conductivity time plots . This report presents only the <br /> conductivity plots because conductivity reflects the same changes <br /> in individual wells as seen on the TDS plots with few outliers in <br /> the data. Conductivity is a good indicator of TDS and some major <br /> constituent concentrations. <br /> Wells GA1 and GA2 are used to monitor the QR and KLM aquifers <br /> at the GA site. Figures B-1 and B-2 present the field conductivity <br /> versus time plots for wells GA1 and GA2. The conductivity from <br /> well GA1 had exhibited significant fluctuations during some years <br /> but is fairly steady in 19B9. The overall plot of conductivity <br /> versus time for well GA1 presents a slight declining trend . The <br /> conductivity versus time plot for well GA2 exhibited a declining <br /> trend from 1981 to 1985 then exhibited a small increasing trend <br /> the next three years. An overall declining trend seems to have <br /> occurred in 1989. <br /> The GB well site employs wells GB2 and G85 to monitor the <br /> Third White Sandstone and the HI aquifers respectively. <br /> 1 <br /> Conductivities presented on Figure B-3 present a fairly steady <br /> 3-1 <br />