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Groundwater <br />The alluvial groundwater up-gradient of mine influence in the Hubberson Gulch "system" has <br />ranged near 700 mg/t during the years of monitoring. The "006 tributary" has actually decreased <br />in TDS content in the last 2 years to around 2000 mg/I from a high of 2300 mg/l. The prediction <br />is 3400 mg/I. Of course, it remains to be seen how the trends proceed from 1997 into the future. <br />The Sage Creek alluvial aquifer system has also remained at concentrations lower than predicted <br />in the PHC. The alluvial water down-gradient of the area of influence (down-gradient of the <br />confluence with the 009 tributazy) appeazs to have increased steadily in TDS-content from -500 <br />mg/I in 1990 to 700 mg/t in 1996. The predicted maximum concentration in the PHC is 972 <br />mg/1, so the water in Sage Creek is on its way. It should be noted, though, the the alluvial <br />groundwater in the Sage Creek alluvium is monitored at several locations up the creek from the <br />006 tributary as far as 4 miles. The TDS concentrations at these locations have vazied widely <br />from site to site, reaching as high as 1700 mg/1 at site WSAL8, more than 3 miles upstream from <br />the tributary. This indicates that the quality of water reaching the down-gradient monitoring <br />point may be ofwidely-varying quality through the years, with effects not necessarily directly <br />atttributable to the inflow of water from the 009 tributary. <br />In general, the AHR indicates that conditions are generally within the bounds predicted in the <br />permit application. <br />