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wells TM- MW -002D, EVMW -3S, EVMW -3D, and EV -MW -004 for the required parameters <br />with the exception of manganese at these wells and iron at EV -MW -004. The data suggest <br />an ambient based NPL would be more appropriate at these sites and, following discussion <br />with DRMS, Climax has initiated monthly sampling at these locations for those parameters <br />in 2014. NPLs will be established pending the results of the 2014 sampling. Due to lack of <br />accessibility at ARK -MW -001 D insufficient data were collected to establish NPLs, so the <br />CBSG Criteria are utilized for comparison. <br />POC Well ARK -MW -001 D was above the CBSG Criteria for manganese in the third <br />quarter, but had dropped well below the criteria in the fourth quarter. The CBSG Criteria for <br />manganese is 0.05 mg /L and the results for ARK -MW -001 D were 0.056 mg /L and 0.026 <br />mg /L respectively. However, since baseline data are still being collected at this well, this is <br />an indication that the NPL that is established may be higher than the current CBSG <br />Criteria. <br />POC Well TM- MW -002D was both below and above the proposed NPL for pH in the first <br />and second quarters. The pH readings were 6.26 and 8.54 respectively, compared to a <br />proposed NPL pH range of 6.5 — 8.5. The third and fourth quarter pH readings for TM -MW- <br />002D were within in the range. <br />Discussion of Results: Trend Evaluation of Groundwater Data <br />The analytical results for all groundwater sites were evaluated for trends for all parameters <br />that were analyzed. In groundwater monitoring locations with long histories of data <br />collection (2+ years) the most recent data was appended to the period of record data for <br />each site and trends were evaluated. With the exception of wells EVMW -1 S, EVMW -1 D, <br />and EV -MW -004 no other wells showed significant increasing trends in groundwater <br />concentration. The trends observed in wells EVMW -1 S, EVMW -1 D and EV -MW -004 are <br />part of a continuing investigation of groundwater below the Robinson Lake Seep Pump <br />Station, and have been documented in a report submitted to DRMS on November 27tH <br />2013, as well as in follow -up reports. Groundwater in wells ARwell, GWM -1, and GWM -2 <br />continues to show decreasing trends in sulfate, total dissolved solids, magnesium, and <br />molybdenum as reported last year. <br />Discussion of Results: Outlier Identification <br />The 2013 groundwater and surface water data also were analyzed for outliers, of which <br />none were found for this data set. <br />2 <br />