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naturally observed concentrations and will probably be higher for <br />several ,years before returning to pre-mine concentrations. Maior <br />constituent concentration in water in this well may be starting to <br />gradually decline. The water quality in 9R wells GD2 and GF6 has <br />not been affected by the upgradient mining. The conductivity <br />concentrations for OR well GA1 also indicate that mining has not <br />influenced water quality in this aquifer in this area. The last <br />two years of conductivity values for well GEi indicate an <br />increasing trend has started. These increases are within natural <br />variations and probably not caused by mining. Continued monitoring <br />will define whether a loner term trend has started. The remainder <br />of the QR wells are located east of present mining activities and <br />• could not have been affected. <br />The water quality in the four HI aquifer wells, GB5, GE2, GF4 <br />and GP3 which are close to but have not been influenced by mining. <br />The remainder of the HI wells east of the areas mined have not been <br />affected. <br />The conductivity plot at Third White Sandstone well GB2 have <br />probably been affected by mining, but the change is within natural <br />variations for this aquifer. Mining could have caused <br />concentrations to vary in Third White Sandstone well GE3 but the <br />variations observed are also within natural variation. Third White <br />Sandstone wells GC2 and GP9 are east o£ the minine and, therefore, <br />observed changes in water quality in these wells has to be natural. <br />Changes in Third White Sandstone well P8 are also thought to be <br />• natural because upgradient mining has occurred only during the last <br />6-:3 <br />