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Table 1Colony Mine PortalWater Data SummaryLocation DescriptionColony MineSample TypeWaterSample ID20251014-NPRWP-(ST-PORTAL)DepthsurfaceSample Date10/14/2025Acute ChronicPhysical and Biological Temperature10.99.0 - 13.09.0 - 13.0°C Dissolved Oxygen (DO)8.63->6mg/L pH7.956.5 - 9.0-su E. Coli (per 100 mL)<1-205MPN per 100mLInorganic Ammonia<0.100 6.168 0.357 mg/L Boron <0.200 - 0.75 mg/L Chloride 9.72 - 250 mg/L Chlorine <0.100 0.019 0.011 mg/L Cyanide <0.00500 0.005 - mg/L Nitrate <0.10010 -mg/L Nitrite <0.100-0.05mg/L Phosphorus <0.100-21mg/L Sulfate 201-250mg/L Sulfide <0.00500- 0.0020mg/L Hardness 406--mg/LMetals Arsenic <10.0 340 - µg/L Arsenic(T) <10.0 - 0.02 µg/L Cadmium <2.00 6.63 2.05 µg/L Cadmium(T) <2.00 5.0 - µg/L Chromium, Trivalent <10.0 - 220 µg/L Chromium, Trivalent(T) 2.74 50 - µg/L Chromium, Hexavalent <0.100 16 11 µg/L Copper <10.0 50 30 µg/L Iron <100 - 300 µg/L Iron(T) <100 - 1000 µg/L Lead <6.00 285 11.3 µg/L Lead(T) <6.00 50 - µg/L Manganese <10.0 4760 50 µg/L Mercury(T) <0.200 - 0.01 µg/L Molybdenum(T) 19.8 - 150 µg/L Nickel <10.0 1531 170 µg/L Nickel(T) <10.0 - 100 µg/L Selenium <10.0 18.4 4.6 µg/L Silver <5.00 22.6 0.844 µg/L Uranium 3.53 16.8 16.8 µg/L Zinc <50.0 572 433 µg/L°C - degrees celcius mg/L - milligrams per literµg/L - micrograms per litermmhos/cm - millimhos per centimetersu - standard unitsMPN - most probably numberD.O. - dissolved oxygenAll metals are dissolved unless otherwise notedTVS - Table Value StandardWS - Water SupplyT - total recoverableExceeds CDPHE allowable limitLABORATORY DATA SUMMARYCDPHE Regulation #37 Stream Classification and Water Quality Standards - Lower Colorado RiverUNITSAnalytical Parameters