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5 <br />The cation/anion balance for the September 2010 sample from alluvial well 21-5 <br />is -5.2 %. The sum of the anions and cations measured from this sample are <br />39.4 meq/L and 35.5 meq/L, respectively. Conductivity and total dissolved solids <br />were both in-line with historical values and below EWL range. The values for all <br />other indicator parameters analyzed were below the EWI levels showing no <br />marked corresponding increase. Data validation and QA/QC samples indicate <br />no apparent laboratory or sampling issues. Monitoring of alluvial well 21-5 will <br />continue on a quarterly frequency. <br />Two other dissolved sodium values flagged during the reporting period. Both <br />were from zones within the point of compliance multiple completion well 21-3 <br />down gradient from the 0 - 5 year mining panel. <br />Uinta Well 21-3U <br />Dissolved sodium recorded during the quarter at Uinta well 21-3U has a value of <br />7040 mg/L in contrast to the calculated NPL of 6962 mg/L for this well in the <br />Uinta aquifer, a difference of 78 mg/L. The baseline mean value for this <br />constituent at this location is 6356 mg/L and the operational mean value is 6002 <br />mg/L. This is the first occurrence of the dissolved sodium value exceeding the <br />NPL during the operational period of record for this monitoring location. <br />The historical record of dissolved sodium samples collected versus the ground <br />water elevation at Uinta well 21-3U is provided in the following graph.