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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 />Idaho <br />Spring <br />5/2010 <br />Idaho <br />Spring <br />8/2010 <br />Idaho <br />Spring <br />11/2010 <br />Idaho <br />Spring <br />2/2011 <br />Idaho <br />Spring <br />5/2012 <br />Aluminum <br />NA <br />NA <br />NA <br />NA <br />ND <br />Antimony <br />0.006 <br />- <br />- <br />0.0009 <br />0.0006 <br />0.0008 <br />NS <br />0.0006 <br />Arsenic <br />0.01 <br />0.34 <br />0.15 <br />0.0013 <br />0.0009 <br />0.0012 <br />NS <br />0.0010 <br />Barium <br />2 <br />-- <br />-- <br />0.0059 <br />0.0890 <br />0.0766 <br />NS <br />Beryllium <br />0.004 <br />- <br />- <br /><0.0005 <br /><0.0005 <br /><0.0005 <br />NS <br />Boron <br />0.75 <br />- <br />- <br /><.100 <br />0.2 <br />0.2 <br />NS <br />Cadmium' <br />0.005 <br />0.0015 <br />0.00025 <br /><0.00005 <br /><0.00005 <br />0.0001 <br />NS <br />0.00006 <br />Calcium <br />NA <br />NA <br />28.3 <br />39.9 <br />39.0 <br />NS <br />28.7 <br />Chromium <br />0.1 <br />0.016 <br />0.011 <br />0.005 <br /><0.001 <br />0.007 <br />NS <br />0.0014 <br />Copper' <br />1.3 <br />7.0 <br />5.0 <br />0.0007 <br />0.0006 <br />0.0009 <br />NS <br />0.0005 <br />Iron <br />NA <br />NA <br />NA <br />NA <br />ND <br />Lead' <br />0.015 <br />0.03 <br />0.0012 <br />0.0009 <br />0.0002 <br />0.0002 <br />NS <br />0.0009 <br />Magnesium <br />NA <br />NA <br />7.8 <br />11.0 <br />12.9 <br />NS <br />8.66 <br />Manganese' <br />0.05 <br />2 <br />1 <br />0.0008 <br />0.0011 <br /><0.0005 <br />NS <br />0.0012 <br />Mercury <br />0.002 <br />0.0014 <br />0.00001 <br />(total) <br /><0.0002 <br /><0.0002 <br /><0.0002 <br />NS <br />ND <br />Nickel <br />0.26 <br />0.029 <br />0.0008 <br />0.0008 <br />0.0013 <br />NS <br />ND <br />Potassium <br />1.3 <br />1.0 <br />1.3 <br />NS <br />ND <br />Selenium <br />0.05 <br />.018.4 <br />0.0046 <br /><.001 <br /><0.001 <br /><.001 <br />NS <br />ND <br />Silver <br />0.1 <br />0.00062 <br />0.0001 <br /><0.00005 <br /><0.00005 <br /><0.00005 <br />NS <br />ND <br />Sodium <br />NA <br />NA <br />1.2 <br />1.7 <br />1.8 <br />NS <br />1.21 <br />Thallium <br />0.002 <br />-- <br />0.00015 <br /><0.05 <br /><0.00005 <br /><0.00005 <br />NS <br />ND <br />Uranium' <br />0.3 <br />1 <br />1 <br />0.00061 <br />0.00071 <br />0.00087 <br />NS <br />0.0006 <br />Zinc' <br />5 <br />5 <br />0.079 <br />0.069 <br />0.017 <br />0.012 <br />0.015 <br />NS <br />0.0121 <br />Hardness <br />NA <br />NA <br />- <br />- <br />103 <br />145 <br />151 <br />NS <br />107 <br />Dissolved Metal Concentration -Table 2 <br />Idaho Spring <br />Wildcat Mining Corporation <br />May Day Idaho Mine Complex <br />Notes <br />1. All results mg /L except Hardness (mg /L as CaCO <br />2. The Basic Standards and Methodologies for Surface Water, 5 CCR 1002 -31 (Regulation No. 31), <br />Table Ill 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 />5. - = No Standard NS -Not Accessbile (Deep Snow) <br />5/20/10 <br />