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<br />~- - <br />3.0 GROUND-WATER QUALITY <br />Appendix B presents the ground-pater 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 />~F \ ~''~ <br />~ <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 /> and has varied over a similar range in 1990. The overall plot of <br /> conductivity versus time for well GA1 presents a slight declining <br /> trend. The conductivity versus time plot for well GA2 exhibited <br /> a declining trend from 1981 to 1985 then exhibited a small <br /> increasing trend the next three years. The range of 1990 <br /> conductivities is similar to that previously monitored from this <br />well. <br />The GB well site employs wells GB2 and GB5 to monitor the <br />~~1 Third White Sandstone and the HI aquifers respectively. <br />3-1 <br />