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Water Quality Monitoring Plan Climax Molybdenum Company <br /> Version:R4 Permit No. M-1977-493 <br /> Table 4-2—Groundwater Monitoring Parameters <br /> Indicator Parameters <br /> Cadmium,dissolved Zinc,dissolved <br /> Copper,dissolved pH <br /> Iron,dissolved Sulfate(SO4) <br /> Manganese,dissolved Total Dissolved Solids(TDS) <br /> Molybdenum,dissolved Fluoride,dissolved (Arkansas POC <br /> Wells Only) <br /> Expanded Baseline Monitoring Parameters <br /> Aluminum,dissolved Selenium,dissolved <br /> Antimony,dissolved Silver,dissolved <br /> Arsenic,dissolved Sodium,dissolved <br /> Barium,dissolved Thallium,dissolved <br /> Beryllium,dissolved Vanadium,dissolved <br /> Calcium,dissolved Bicarbonate(HCO3) <br /> Chromium(Crlll+CrVI),dissolved Total Alkalinity <br /> Cobalt,dissolved Chloride,dissolved <br /> Lead,dissolved Cyanide,WAD <br /> Magnesium,dissolved Cyanide,total <br /> Mercury,dissolved Fluoride,dissolved <br /> Nickel,dissolved Total Nitrate+Nitrite as N <br /> Potassium,dissolved Total Organic Carbon(TOC) <br /> 4.1.2 Internal Surface Water Monitoring Sites <br /> Analytical data collected from the internal surface water monitoring locations CC-SW1 and El-SW1 during <br /> the extended baseline monitoring period are in Appendix B-4. For the internal surface water monitoring <br /> sites identified in this WQMR the TR-18 analytical list was developed following the same approach as <br /> groundwater sites. The TR-18 analytical parameter list for internal surface water samples is in Table 4-3 <br /> and differs from the groundwater list with the addition of hardness, ammonia (NH3), and total mercury in <br /> lieu of dissolved. <br /> As indicated in Table 4-3, and as described in TR-18, dissolved iron, manganese, and molybdenum, pH, <br /> Sulfate, and Total Dissolved Solids were identified as appropriate indicator parameters for internal surface <br /> water monitoring, following the baseline data collection period. <br /> Section 4.1.4 describes the evaluation of the baseline data through the end of 2017 and includes the <br /> indicator parameter list for continued monitoring for early detection of mining-related sources. <br /> EPP—Appendix C May 2018 17 <br />