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Table 3: Laboratory Analytical Suite for Groundwater Monitoring <br />Parameter FEDERAL DRINKING COLORADO WATER QUALITY <br />WATER STANDARDS STANDARDS( �) <br />Domestic Water Domestic Groundwater <br />MCL SMCL (1) Supply - Human Water Supply Agricultural <br />Health Standards - Table 2 Standards <br />Standards <br />Dissolved Metals <br />Aluminum <br />0.2 <br />5.0 <br />Antimony <br />0.006 <br />0.006 <br />Arsenic <br />0.01 <br />0.01 <br />0.1 <br />Barium <br />2 <br />2 <br />Beryllium <br />0.004 <br />0.004 <br />0.1 <br />Boron <br />0.75 <br />Cadmium <br />0.005 <br />0.005 <br />0.01 <br />Chromium <br />0.1 <br />0.1 <br />0.1 <br />Cobalt <br />0.05 <br />Copper <br />1.3 <br />1 <br />1.3 <br />1 <br />0.2 <br />Iron <br />0.3 <br />0.3 <br />5.0 <br />Lead <br />0.015(4) <br />0.05 <br />0.1 <br />Lithium <br />2.5 <br />Manganese <br />0.05 <br />0.05 <br />0.2 <br />Mercury <br />0.002 <br />0.002 <br />0.01 <br />Molybdenum <br />0.035 <br />Nickel <br />0.1 <br />0.2 <br />Selenium <br />0.05 <br />0.05 <br />0.02 <br />Silver <br />0.1 <br />0.05 <br />0.1 <br />Thallium <br />0.002 <br />0.002 <br />Uranium <br />0.03 <br />0.03 <br />Vanadium <br />0.1 <br />Zinc <br />5 <br />5 <br />2.0 <br />Radioattclides <br />Gross alpha (pCi/L) <br />15 <br />15 <br />Gross beta (pCi/L) <br />4 (mrem) /yr <br />50 pCi/L(5) <br />4 (mrem) /yr <br />Radium 226 Ci/1 <br />5 <br />5 <br />inns & indicator <br />Alkalinity <br />Bicarbonate <br />Carbonate <br />Hydroxide <br />Calcium <br />Magnesium <br />Phosphorus <br />Hardness <br />Chloride <br />Fluoride <br />Sulfate <br />250 <br />Nitrate+Nitrite (as N) <br />10 <br />10 <br />100 <br />TDS <br />500 <br />Laboratory pH (s.u.) <br />6.5 -8.5 <br />6.5-8.5 <br />Lab Electrical Conductivity (µmhos/cm) <br />Notes: All units are mg/L unless otherwise noted. <br />(1) MCL (SMCL) = Maximum Contaminant Level (Secondary Maximum Contaminant Level) <br />(2) CDHPE, 2009. Colorado Department of Public Health And Environment, Water Quality Control Commission, Regulation No. 41, <br />The Basic Standards For Ground Water (5CCR1002 -41) <br />(3) Lead MCLIMCLG is 0; action level is 0.015 <br />(4) EPA Action Level for gross beta particle activity in <br />drinking water is <br />50 pCi/L <br />