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2016 Recommended Modifications to the West Elk Mine Hydrologic Monitoring Network 25 <br />fine grained iron -rich sediments in the sample matrix. Time -series water quality graphs for <br />Spring E-13-1 are shown in Figure 20. <br />20. Water (Quality in Spring E-13-1 <br />Spring E-13-1 <br />1.200 <br />E 1.000 <br />N <br />_Z <br />> 600 <br />U <br />v 600 <br />C <br />O <br />U <br />Y400 <br />U <br />M 200 <br />0 <br />-49-- EC Date <br />Spring E-13-1 <br />0.s <br />o.e <br />0.7 <br />0.6 <br />E <br />c 0.5 <br />Q i <br />0.4 <br />C 0.3 <br />m 0.2 <br />0.1 y <br />0 <br />tDiss. Iron Date <br />1,200 <br />E 1,000 <br />m <br />v <br />C 800 <br />to <br />v <br />600 <br />c <br />v <br />CL <br />h <br />U) 400 <br />A <br />� 200 <br />0 <br />-*-TSS Date <br />Spring E-13-1 <br />August 2016 HydroGeo, Inc. <br />