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<br />13. <br />3. There does not appear to be any significant changes in <br />the creek water quality as it passes the mine. <br />Suggesting that the discharge of treated pit water, via <br />a treatment sand, is not affecting either creek or AVF <br />' water quality. <br />6.4 TEMPORAL CHANGES <br />' Plots of electrical conductivity values for major sampling sta- <br />tions are shown on Fig. 5. The electrical conductivity (EC) is <br />' a useful indicator of total dissolved solids concentrations in <br />the water. Also shown on the same graph are hydrographs of <br />stream flow at the two Stollsteimer Creek stations. <br />The following are comments on some of the observed trends: <br />' 1. There is no evidence of an increase in total dissolved <br />' solids in any of the monitoring stations. <br />2 EC values in the creek, and many of the alluvial wells, <br />are generally inversely proportional to the stream flow. <br />this suggests that local recharge is diluting the dry <br />• , weather groundwater concentrations, that are more <br />indicative of bedrock water quality. <br />' 3 The significant reduction of EC values for well W-5 is <br />' not easy to explain with the available data. <br /> <br /> <br /> <br /> <br />D A Pi1EAU 6 ASSOCiA iES LiMiIED <br />