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COLORADO LEGACY LAND $CHWARTZWALDER MINE TABLE E-4.CoL ARGE PERMIT 44 WATER NT DISC MPL Effluent Limitations Maximum Concentrations Monitoring Requirements 30-Day 7-Day 2-Year Effluent Parameter Units Average Average Daily Maximum Average Frequency Sample Type Antimony,Total µg/L 5.6 - 2 Days/Month Composite Arsenic,Total Recoverable µ L Report - - - 2 Days/Month Composite Boron,Total Recoverable mg/L 0.75 - - - 2 Days/Month Composite Cadmium,Potentially Dissolved µg/L Report - Report - 2 Days/Month Composite Chemical Oxygen Demand mg/L 100 - 200 - 1 Day/Week Composite Chromium(Cr[III]),Total µg/L - - 50 0.75 2 Days/Month Composite Hexavalent Chromium(Cr[IV]),Dissolved µ L Report - Report - 2 Days/Month Composite Copper,Potentially Dissolved µ /L 12 - 18 1.8 2 Days/Month Composite Cyanide,WAD µg/L - - 5 0.85 2 Days/Month Composite Chloride mg/L 250 - - 54 2 Days/Month Composite Effluent Flow MGD 0.288 - Report - Continuous Recorder Fluoride mg/L - - 2 - 2 Days/Month Composite Iron,Dissolved µg/L 300 - 45 2 Days Month Composite Iron,Total Recoverable µg/L Report - - Report 2 Days Month Composite Manganese,Dissolved µg/L 50 - - 7.5 2 Days/Month Composite Mercury,Total µg/L Report - - 2 Days/Month Composite Nickel,Potentially Dissolved µg/L Report - Report Report 2 Days/Month Composite Oil and Grease mg/L - - 10 - 5 Days/Week Visual/Grab H - - - 6.5-9 - 5 Days/Week Grab Selenium, Potentially Dissolved µ L Report - Report Report 2 Days/Month Composite Silver,Potentially Dissolved µg/L 0.13 - 3.5 0.02 2 Days/Month Composite Sulfate mg/L 250 - - 131 2 Days/Month Composite Sulfide mg/L Report - - Report 2 Days/Month Composite Total Radium 226+228 pCi/L 5 - - - 2 Days/Month Composite Radium 226,Dissolved pCi L 3 - 10 - 2 Days/Month Composite Radium-226,Total pCi/L 10 - 30 - 2 Days Month Composite Total Dissolved Solids m L I Report - I Report - Quarterly Composite AUGUST 2020 29 AMENDMENT 5