Laserfiche WebLink
conductivity measurements is presented in Figure 16. The data <br />• for the three Middle Sandstone Wells which are monitored for <br />water quality show no adverse impact or trend. Water quality <br />data are summarized in Tables 9 through 14. Plots of field <br />conductivity for these Middle Sandstone Wells are presented in <br />Figure 17. Wells TR-7A and TR-4 indicate slight reduction in <br />concentrations of major ions over time. All three wells show <br />reduction in concentrations of iron which shows considerable <br />variation in concentrations. The general reduction in iron <br />concentrations may be the result of better purging of well <br />bore volumes prior to sampling plus a switch to dissolved <br />concentration analysis. The water quality data for the two <br />Twentymile Sandstone Wells, No. 9 Mine Well and Well 259 show <br />no significant impact or trend. Water quality data are <br />• summarized in Tables 16 through 18. Plots of field <br />conductivity over time are presented in Figures 18A and 18B. <br />While the field conductivity appears to be be increasing <br />slightly in the ~9 Mine well, this does not appear to be <br />significant in light of the water quality. in summary, the <br />water quality of all three sandstone aquifers do not indicate <br />any significant trends or adverse impacts related to mining at <br />Mines 5 and 6. <br /> <br />S <br />