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dissolved sodium samples versus the ground water elevation at alluvial well 21 -5 <br />is provided in the following hydrograph: <br />550 <br />525 <br />500 — <br />475 <br />450 <br />425 <br />y 400 <br />m <br />375 <br />0 350 <br />_N 325 1 <br />300 <br />275 � `" <br />250 +--T -T <br />Well 21 -5 (Alluvial Completion) <br />Water Elevation and Dissolved Sodium <br />C2o <br />N <br />Early Warnina Indicatnr =AM mnll r, LO LO <br />r` <br />Operational <br />h W ��Minl���M�I��� r- CXOh[O��M�IJf�6��C <br />Date <br />Water Elevation —o — Sodium, dissolved <br />Temporary <br />Suspension <br />v�n�rxncocor`naoaornrno <br />000000000000 <br />f�LOCO <br />M -Mmmwm <br />\�M M�M6)MNM <br />6040 <br />6039 <br />6038 <br />r 6037 <br />6036 <br />60351 <br />60341 <br />r 6033'. <br />6032 <br />6031' <br />— 60301 <br />—NNM <br />- Sodium Early Warning Indicator <br />5 <br />The cation /anion balance for the June 3, 2013 sample from alluvial well 21 -5 is <br />0 %. The sum of the both the anions and cations measured from this sample are <br />33.7 meq /L. Conductivity (2860 umhos /cm) and total dissolved solids (2000 mg /L) <br />were both representative of historical values and below EWI range. The values for <br />all other indicator parameters analyzed were below the EWI levels showing no <br />marked corresponding increase. Data validation and QA /QC samples indicate no <br />apparent laboratory or sampling issues. Monitoring of alluvial well 21 -5 will <br />continue on a quarterly frequency. <br />