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Water Quality Monitoring Plan Climax Molybdenum Company <br /> Version R4 Permit No M-1977-493 <br /> Based on the evaluation of baseline monitoring data, the indicator parameter list for surface water <br /> monitoring at Climax is in Table 4-5. <br /> Table 4-5-Indicator Parameters for Surface Water Monitoring <br /> Indicator Parameters <br /> Cadmium,dissolved Molybdenum,total recoverable <br /> Copper,dissolved Zinc,dissolved <br /> Iron,dissolved pH <br /> Iron,total recoverable Sulfate(SO4) <br /> Manganese,dissolved Total Dissolved Solids(TDS) <br /> Molybdenum,dissolved Hardness <br /> 4.2 Monitoring Schedule <br /> All groundwater and internal surface water monitoring locations under this WQMP will continue to be <br /> monitored for indicator parameters quarterly, weather and access conditions permitting. Ongoing surface <br /> water monitoring of the East Fork Arkansas River and the East Fork Eagle River will be performed semi- <br /> annually, to collect data during high-flow and low-flow conditions. Concurrent monitoring will be conducted <br /> when possible at sampling stations on the East Fork Eagle River and the Eagle Park Reservoir outlet during <br /> periods of discharge from the reservoir. The Eagle Park Reservoir outlet generally releases water during <br /> winter months, November through March, but may also release water in late summer or fall. Climax will <br /> conduct concurrent sampling on the East Fork Eagle River and at the EPR Outlet at least once each year <br /> during the river low flow winter period. When possible, Climax will again concurrently sample these sites <br /> in the late summer or early fall if water is released from the reservoir. <br /> EPP—Appendix C March 2018 20 <br />