Laserfiche WebLink
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/1 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 />Figure B-7 presents the TDS concentrations versus time for alluvial wells GC -3, P-1, J-1 and <br />COY., TDS concentrations in Pyeatt alluvial well P-1 were variable in 2015 similar to historical <br />level. <br />The TDS concentrations in alluvial ground water in Johnson Gulch (J-1) have been fairly <br />steady since 2000. The recent Johnson Gulch alluvial ground water is within the natural range for <br />TDS in this aquifer. These TDS values and variations are very similar to the natural values and <br />variations observed in Flume Gulch alluvial well, COY. <br />Flume Gulch has two alluvial monitoring wells, GC -3 and COY. TDS concentrations <br />overall have been steady in well GC -3 with variations observed the last few years similar to previous <br />values. The 2015 TDS concentrations in the COY well were similar to higher values in well GC -3. <br />The TDS concentrations in the COY well and historical variations in well P-1 show that the Johnson <br />alluvial TDS concentrations are within natural alluvial concentrations in the alluvial aquifers in this <br />area. <br />3.2 SULFATE <br />Figure B-8 presents the sulfate concentrations for QR wells GD -2 and GD -3. Sulfate in <br />backfill well GD -3 were steady between 2000 and 2009 and then overall increased during the last <br />few years prior to a small decline in 2014 and steady values in 2015. Sulfate concentrations in well <br />GD -3 had been fairly steady prior to the change in the last few years. This indicates that the sulfate <br />Trapper Mining Company 3-4 <br />2015 Annual Report <br />