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3 <br />Sample Date <br />Alluvial Well 21 -5 <br />Dissolved Sodium (mg /L) Continued <br />June 3, 2013 <br />503 <br />November 18, 2013 <br />514 <br />March 10, 2014 <br />519 <br />September 21, 2014 <br />515 <br />The seasonal water level variation does not correlate closely with fluctuations in the <br />concentration of dissolved sodium. The historical record of dissolved sodium samples <br />versus the ground water elevation at alluvial well 21 -5 is provided in the following <br />hydrograph: <br />550 <br />525 <br />500 <br />475 <br />E 450 <br />E 425 <br />, <br />0 400 <br />375 <br />> 350 <br />y 325 <br />G 300 <br />275 <br />in <br />250 <br />Well 21 -5 (Alluvial Completion) <br />Water Elevation and Dissolved Sodium <br />mo <br />N <br />O N <br />Early Warning Indicator = 498 mg /L -0 i Y <br />a � <br />operational <br />O � <br />in <br />Temporary <br />Suspension <br />Date <br />Water Elwadon Sodium, dissolved Sodium Early Warning IndicaWr <br />6040 <br />6039 <br />6038 <br />6037 <br />6036 <br />6035 <br />6034 <br />6033 <br />6032 <br />6031 <br />6030 <br />The cation /anion balance for the September 21, 2014 sample from alluvial well 21 -5 is <br />0 %. The sum of the anions and cations measured from this sample are both 35 meq /L. <br />