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indicate that statistically significant increasing temporal trends were calculated for two VOCs in <br /> NvellAMW-13. These results are similar to previous results and it has been recommended that <br /> wells ANIW-6, AN[W-13, and AMW-14 be re-designated as corrective action program (CAP) <br /> wells since they have historically contained VOCs. For the routine inorganic monitoring <br /> parameters, CLs were exceeded for constituent concentrations in DNIP wells AMW-7, AMW-12, <br /> and AMW-13. Trend analyses indicate that statistically significant increasing temporal trends <br /> were calculated for barium and chloride concentrations in wells AMW-12. In the CAP wells, <br /> trend analyses are performed instead of comparison to CLs. During the Current monitoring <br /> period, statistically significant increasing trends were noted for three VOCs in CAP well <br /> AM.W-1, while decreasing VOC trends were noted for several VOCs in CAP wells ANNIW-1, <br /> AMV-4, AMW-10,AMW-1 1, and AMW-1913R. The increasing trend exhibited for cis-1,2- <br /> dichloroethene at well AMW-1, and generally decreasing(organic and inorganic) trends noted ill <br /> most of the CAP wells, suggests that corrective action measures have been successful in <br /> reducing facility related groundwater impacts downgradient of the Austin Unit. <br /> Surface water samples collected from the upstream and downstream surface water monitoring <br /> stations during the third quarter 2013 monitoring period are generally consistent. With the <br /> exception of an estimated trace concentration of toluene detected at surface water station <br /> ASW-2, no VOCs were detected. <br /> I certify under penalty of law, that I have personally examined and am familiar with the <br /> information submitted in this document and all attachments, and that based on my inquiry of <br /> those individuals immediately responsible for obtaining this information, I believe that the <br /> information is true, accurate, and complete. I am aware that there are significant penalties for <br /> submitting false information, including the possibility of fine and imprisonment. <br /> If you have any questions regarding this report, please call me at (209) 982-4298. <br /> Sincerely, <br /> Erin Fanning <br /> Environmental Manager <br /> Attachment <br /> CM13-021WOnia,dUr 3Q13 <br /> -2- <br />