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values-in well- GMP -1 -are likely caused by the upgradient mining. A gradual rise in- the-baekfdl water <br />level in this area had occurred the last several years. The overall TDS concentrations in well GC -1 in <br />2013 are similar to values that existed prior to the small increase in 2010. The 2006 through 2009 <br />monitoring indicates the 2005 increases were not representative of large portions- of the aquifer in this <br />area. TDS concentrations -in HI aquifer well -GP -3, f nther-downgradient of well GMP--1, have overall <br />been steady for the period of observation. TDS concentrations in eastern- wells have varied, showing <br />that TDS varies naturally over a large range in this aquifer. Fluctuations observed in wells GC -T and <br />GP -7 except for the last few years must be natural due to their location. <br />Figure B -6 presents - the TDS for 3rd White Sandstone wells GC -2, GP -9 and P -8. <br />Concentrations in each of these wells have - been fairly steady for the last few years. The TDS for the <br />previous sixteen years for well P -8 shows fairly steady concentrations after a large increase in 1995 <br />over three years to a value of approximately 4000 mg/1. The 201 -3 IDS concentrations in well P -8 <br />were steady. The increase in well P -8 is above the levels expected for the 3rd White Sandstone and is <br />likely due to the upgradient mining based on the timing and magnitude of the increase. However, <br />some of this higher- level- could be natural based on natural large concentrations observed in 2nd <br />White Sandstone well P -5. Concentrations are expected to decline in the future if the increase is due <br />to upgradient mining. <br />Figure B -6 also presents- TDS values- for 2nd White Sandstone well P -5 and shows. that the <br />concentration were in the 2500 to 3000 mg/l range prior to mining in this area and were- similar to <br />these values in the most recent samples. Natural water - quality concentrations in the 1 st, 2nd and 3rd <br />White Sandstones are expected to vary over a similar range. <br />Trapper Mining Company 3 -3 <br />2013 Annual Report <br />