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Rob Zuber <br />Page 5 <br />April 14, 2016 <br />For the first time since 2005, water was detected in MW -16. This is indicative of the unusually <br />wet spring in 2015. The historical record of water levels in MW -16 shows considerable <br />fluctuation and suggests that the well is in close communication with both surface water and <br />the Southfield Mine underground workings. EFCI provided a helpful analysis in the 2015 AHR. <br />Water quality parameters in the samples taken at all three wells were in line with historical data. <br />Compared to the historical record TDS was roughly average in MW -23 and MW -65 and below <br />average in MW -16; dissolved iron was well below average in all three wells; dissolved <br />manganese was slightly elevated relative to average in all three wells, but well below the <br />maxima, and not of concern. <br />The levels of nitrate and phosphorus measured at MW -23 had decreased relative to the data <br />collected in December, 2014, (from 1.6 mg/L to 0.93 mg/L, and from 0.23 mg/L to 0.21 mg/L, <br />respectively). <br />Conclusion <br />The 2015 AHR was submitted in accordance with the rules and the permit. The data contained in <br />the report shows no cause for concern, or significant divergence from previously observed <br />trends. <br />Violation CV -2013-002 was vacated by the Division on 7/30/2015; the water monitoring <br />program was subsequently terminated with TR -43, which was issued on 10/14/15. The 2015 <br />AHR therefore marks the end of EFCI's hydrologic monitoring and reporting obligation to the <br />Division. The CDPS discharge points should continue to be monitored and reported on until the <br />CDPS permit is terminated. <br />