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Analyte <br />MCL mg /I <br />Secondary <br />Drinking <br />mg /I <br />Acute <br />mg /I <br />Chronic <br />mg /I <br />SW -2 <br />5/2010 <br />SW -2 <br />8/2010 <br />SW -2 <br />11/2010 <br />SW -2 <br />2/2011 <br />SW -2 <br />5/2011 <br />Aluminum <br />0.13 <br />Antimony <br />0.006 <br />- <br />- <br /><0.0005 <br /><0.0005 <br /><.0005 <br /><.0005 <br />ND <br />Arsenic <br />0.01 <br />0.340 <br />0.150 <br /><0.0005 <br /><0.0005 <br /><.0005 <br /><.0005 <br />ND <br />Barium <br />2 <br />- <br />- <br />0.0373 <br />0.0484 <br />0.0516 <br />0.0552 <br />NA <br />Beryllium <br />0.004 <br />- <br />- <br /><0.0005 <br /><0.0005 <br /><.0005 <br /><.0005 <br />Na <br />Boron <br />0.75 <br />-- <br />- <br /><.100 <br />0.3 <br />0.3 <br />0.7 <br />Na <br />Cadmium <br />0.005 <br />0.002 <br />0.000 <br /><0.00005 <br /><0.00005 <br /><0.00005 <br /><0.00005 <br />Na <br />Calcium' <br />NA <br />NA <br />17.9 <br />21.7 <br />24.7 <br />28.1 <br />14.6 <br />Chromium <br />0.1 <br />0.016 <br />0.011 <br />0.002 <br /><0.001 <br />0.003 <br />0.001 <br />ND <br />Copper <br />1.3 <br />0.007 <br />0.005 <br />0.0046 <br />0.0024 <br />0.0019 <br />0.0005 <br />0.0068 <br />Iron <br />0.058 <br />Lead " <br />0.015 <br />0.030 <br />0.001 <br /><0.0001 <br /><0.0001 <br /><0.0001 <br /><0.0001 <br />ND <br />Magnesium' <br />NA <br />NA <br />2.2 <br />2.8 <br />3.1 <br />3.5 <br />2 <br />Manganese' <br />0.05 <br />2.370 <br />1.310 <br />0.0019 <br />0.0012 <br /><0.0005 <br /><0.0005 <br />ND <br />Mercury <br />0.002 <br />1.400 <br />0.01 (total) <br /><0.0002 <br /><0.0002 <br /><.0002 <br /><.002 <br />ND <br />Nickel <br />0.260 <br />0.029 <br />0.0005 <br /><0.0005 <br />0.0009 <br />0.0018 <br />ND <br />Potassium' <br />NA <br />NA <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />ND <br />Selenium <br />0.05 <br />0.018 <br />0.005 <br /><.0001 <br /><0.001 <br /><.001 <br /><.001 <br />ND <br />Silver ' <br />0.1 <br />0.001 <br />0.000 <br /><0.00005 <br /><0.00005 <br />0.00006 <br /><0.00005 <br />ND <br />Sodium' <br />NA <br />NA <br />0.9 <br />1.1 <br />1.2 <br />1.3 <br />ND <br />Thallium <br />0.002 <br />-- <br />0.015 <br /><0.0005 <br /><0.00005 <br /><0.00005 <br /><0.00005 <br />ND <br />Uranium <br />0.3 <br />1.119 <br />0.699 <br />0.00011 <br />0.00011 <br />0.00018 <br />0.00018 <br />0.0001 <br />Zinc <br />5 <br />5 <br />0.079 <br />0.069 <br />0.003 <br />0.002 <br />0.02 <br />0.002 <br />0.0025 <br />Hardness <br />NA <br />NA <br />-- <br />- <br />54 <br />66 <br />74 <br />85 <br />45 <br />SW -2 -Table 2 <br />Dissolved Metal Concentrations <br />La Plata River <br />Wildcat Mining Corporation <br />May Day Idaho Mine Complex <br />Notes <br />1. All results mg /L <br />2. The Basic Standards and Methodologies for Surface Water, 5 CCR 1002 -31 (Regulation No. 31), <br />Table III Metal Paramaters for Aquatic Life <br />3. Regulation No. 31 Table VI: Table Value Standards for Selected Hardness, Hardness <br />Value of 50 mg/L <br />4. Assumes Total Chromium as Chromium (VI) <br />NA -Not <br />5. -- = No Standard Analyzed <br />5/20/10 <br />