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• <br />constituents and values between -10 and 10 are considered good. <br />Figure B-1 of Appendix B presents the TDS plot for well GA1. <br />Concentrations of TDS in water from the QR aquifer in this area have <br />been fairly steady since 1974, at a concentration of approximately 800 <br />mg/1. Well GA2 has been used to monitor the KLM at this site. Figure <br />B-2 shows the TDS for this well with time. A similar TDS to that <br />observed for water from well GAl is shown for well GA2. <br />Figure B-3 presents the TDS plot for the Third White Sandstone <br />well GB2. This plot shows a fairly steady TDS for this aquifer at <br />this location until 1982 when the concentration was significantly less <br />• than most of the previous measurements. An increase in concentration <br />occurred for the next three years. The 1987 TDS value shows a small <br />decline from 1986, but is more in line with the mean of the data from <br />1974 to 1982. This change was probably caused by mining, but is <br />within the natural range of variation with time. It is likely that <br />mining has caused the lower and higher concentrations, but these <br />affects are possibly allowing concentrations to return to pre-mine <br />level. The TDS concentration, at this location in the HI aquifer, has <br />not varied as it has in the Third White Sandstone. Figure B-4 in <br />Appendix B shows a fairly steady concentration with time except for <br />one outlier. The value for 1987 is close to the mean TDS value for <br />well GB5. <br />The HI aquifer has been monitored at well GC1 since 1974. The <br />3-2 <br />