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Jim Stark <br />March 24, 2015 <br />Page 2 <br />The 2013 AHR is complete. The monitoring at the site was generally in compliance with <br />Division Rules and CWQCC Instream Numeric Standards. There was one exceedence of <br />the CWQCC Instream Numeric Standards at Pond 007 in the 2013 Water Year. The <br />exceedance was for the daily limit for fecal coliform. This occurred on December 31 St, <br />2012. <br />Lab tested parameters varied from year to year when they exceeded 10% above baseline <br />values. Iron total, total dissolved solids (TDS), Total suspended solids (TSS), pH, and <br />electrical conductivity frequently fluctuated. The variation in the data is likely due to a <br />combination of seasonal precipitation changes, as well as, the total amount of <br />precipitation during a year. Years exhibiting below average precipitation seem to have <br />the potential to increase TDS and electrical conductivity. There does not seem to be any <br />trends in data indicating adverse impacts to surface or groundwater systems. <br />Table 5, Summary of the Spring and Seep Monitoring Program, needs to be updated to <br />reflect the current monitoring practices. There are sites that are being monitored " with <br />more than 5 years of data" parameters when they are listed in table five to be monitored <br />as having "less than five years of data ". E -13 -1, for example, is being monitored <br />correctly for "more than five years" parameters, but it is listed to be sampled under the <br />"less than 5 years of data" Annual Lab Water Quality column. <br />This concludes the review of the 2010, 2011, 2012, and 2013 Annual Hydrology Reports for the <br />West Elk Mine. <br />1313 Sherman Street, Room 215, Denver, Co 80203 P 303.866.3567 <br />