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There is a potential for harm to wildlife that might drink from the pond. The elevated selenium and high <br />pH could cause problems. In addition, aquatic birds -ducks, for instance -that alight on the water could <br />suffer ill effects due to contact with the high pH water. <br />Recommendations: <br />Based on the above, I would recommend the following. <br />1. Conduct frequent monitoring for the following pazameters: <br />a. Se <br />b. pH <br />c. CI <br />d. SOa <br />e. TDS <br />f. Tl* <br />*Tl was requested but not analyzed. Tl appeazed on initial CKD leach tests, and is a monitoring <br />pazameter and should continue to be monitored. <br />As discussed with the Operator, sampling analyses should take place every other week until the <br />problem is resolved. <br />2. Sample the neazest down-gradient wells for the above-cited parameters. If any appear elevated, <br />the operator should develop a plan to define the extent of contamination in the groundwater and <br />control or mitigate the problem. <br />3. Sample the A-Pit. <br />4. Conduct sampling frequently until situation stabilizes. <br />5. Initiate remedial action. <br />In addition, I would recommend that the Operator re-assess the monitoring and compliance points, and <br />determine specifically whether A-Pit is truly down-gradient from C-Pit. <br />