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1 <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />lJ <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br /> <br />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 o;E approximately 800 <br />mg/1. Two of the TDS measurements are outliers and are likely <br />erroneous. Well GA2 has been used to monitor the RLM at this site. <br />Figure B-2 shows the TDS for this well with time. A similar TDS to <br />that observed for water from well GA1 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 increa:~e in concentration <br />occurred for the next three years. The 1986 TDS va:Lue is more in line <br />with the mean of the data from 1974 to 1982. This change is probably <br />caused by mining, but is within the natural range of variation with <br />time. Additional monitoring of this well will be useful in defining <br />the cause of the change in TDS concentration. The TDS concentration, <br />at this location in the HI aquifer, has not varied as it has in the <br />Third White Sandstone. Figure B-4 in Appendix B shows a fairly steady <br />concentration with time except for three outliers. The values for the <br />last two years indicate a slight decreasing trend. <br />The HI aquifer has been monitored at well GC]. since 1974. The <br />TDS plot for this well shows a slight increase in TDS for water from <br />3-2 <br />