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increase in well P-8 is above the levels expected for the 3rd White Sandstone and is likely <br />due fb the upgradient mining based on the tinting and magnitude of the increase. <br />However, some of this higher level could be natural based on natural large concentrations <br />observed in 2nd White Sandstone well P-5. Concentrations are expected ib decline in the <br />future if the increase is due to upgradient mining. <br />Figure B-8 presents TDS values for 2nd White Sandstone well P-5 and shows that <br />the concentration has been in the 2500 m 3000 mg/I range prior tb mining in this area. <br />Water quality for 2003 was not collected from well P-5 due to it being dry or nearly dry. <br />Natural water-quality conoentrations in the 1st, 2nd and 3rd White Sandstones are expected <br />to vary over a similar range. Figure &8 also presents 2nd and 3rd White Sandstone well <br />GE-3 and 1st White Sandstone well GLIJX-1, which con~sts of low TDS water. <br />Figure &9 presents the TDS concentrations versus time for alluvial wells GC-3, P-1, . <br />J-1 and COY. Lewis Shale well P-3 is also included in this plot due ip its response to the <br />Pyeatt alluvial system. The TDS in well P-3 increased in the second half of 2003 after <br />decreasing during the first half in this shallow aquifer. TDS concentrations in Pyeatt alluvial <br />well P-1 showed overall increase in 2003. These variations are within the historical natural <br />range. <br />The alluvial ground water in Johnson Gulch had shown an increasing trend in TDS <br />since 1996 with the 2003 value showing a slight decline. The recent Johnson Gulch alluvial <br />ground water is stlll within the natural range for TDS in this aquifer. These TDS values and <br />variations are very similar to the natural values and variations observed in Rume Gulch <br />alluvial well, COY. <br /> <br />3-4 <br />