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2016 Recommended Modifications to the West Elk Mine Hydrologic Monitoring Network 31 <br />ranging from ND to 0.11 mg/L. Total iron values are variable, ranging from ND to 4.04 mg/L. <br />The time -series water quality graphs for Spring E-13-4 are shown in Figure 26. <br />Hgure 26. Water Quality in Spring E;-13-4 <br />Spring E-13-4 <br />Spring E-134 <br />95 ----� <br />9,0 <br />i <br />m 85 <br />c <br />v 8.0 <br />H <br />c 75 <br />a � <br />d <br />E 7.0 <br />6.5 <br />i <br />6.0 <br />$ o <br />6- <br />-a --pH Date <br />180 <br />d 100 <br />9 <br />y 80 <br />CL <br />m <br />h 60 <br />FO 40 <br />20 <br />0 <br />4.5 <br />4 <br />3.5 <br />3 <br />Ol <br />E 2.5 <br />c <br />O 2 <br />A 1.5 <br />0 <br />H <br />1 <br />0.5 <br />0 <br />-+-TS <br />Spring E-13-4 <br />-*-Tot. Iron Date <br />August 2016 HydroGeo, Inc. <br />500 <br />450 <br />E <br />400 <br />m2 <br />z <br />350 <br />300 <br />u <br />v <br />250 <br />-- <br />_ - - <br />c <br />O <br />U <br />200 <br />A <br />150 <br />-_.__---- <br />u <br />d <br />100 <br />W <br />50 <br />0 <br />tEC <br />Date <br />Spring E-134 <br />95 ----� <br />9,0 <br />i <br />m 85 <br />c <br />v 8.0 <br />H <br />c 75 <br />a � <br />d <br />E 7.0 <br />6.5 <br />i <br />6.0 <br />$ o <br />6- <br />-a --pH Date <br />180 <br />d 100 <br />9 <br />y 80 <br />CL <br />m <br />h 60 <br />FO 40 <br />20 <br />0 <br />4.5 <br />4 <br />3.5 <br />3 <br />Ol <br />E 2.5 <br />c <br />O 2 <br />A 1.5 <br />0 <br />H <br />1 <br />0.5 <br />0 <br />-+-TS <br />Spring E-13-4 <br />-*-Tot. Iron Date <br />August 2016 HydroGeo, Inc. <br />