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JD -6 Mine Environmental Protection Plan <br />Table 27. Laboratory Analytical Suite for Groundwater Monitoring <br />FEDERAL DRINKING <br />WATER STANDARDS <br />MCL ( SMCL (u <br />Parameter <br />Dissolved Metals <br />Aluminum <br />Antimony <br />Arsenic <br />Barium <br />Beryllium <br />Boron <br />Cadmium <br />Chromium <br />Cobalt <br />Copper <br />Iron <br />Lead <br />Lithium <br />Manganese <br />Mercury <br />Molybdenum <br />Nickel <br />Selenium <br />Silver <br />Thallium <br />Uranium <br />Vanadium <br />Zinc <br />Radionuclides <br />Gross alpha (pCi/L) <br />Gross beta ( pCi/L) <br />Major ions & indicator parametersW: <br />Alkalinity <br />Bicarbonate <br />Carbonate <br />Hydroxide <br />Calcium <br />Magnesium <br />Phosphorus <br />Hardness <br />Chloride <br />Fluoride <br />Sulfate <br />Nitrate +Nitrite (as N) <br />TDS <br />Laboratory pH (s.u.) <br />Lab Electrical Conductivity (µmhos /cm) <br />4148A.120927 <br />COLORADO WATER QUALITY STANDARDS <br />Domestic <br />Water Supply <br />- Table 2 <br />Standards <br />Domestic Water <br />Supply - Human <br />Health Standards <br />0.006 <br />0.01 <br />2 <br />0.004 <br />0.002 <br />0.03 5 <br />0.1 <br />0.05 <br />0.05 <br />0.002 <br />0.03 <br />15 <br />4 (mrem) /yr <br />Groundwater <br />Agricultural <br />Standards <br />0.006 <br />0.01 <br />2 <br />0.004 <br />0.005 <br />0.1 <br />1.3 <br />0.015 <br />0.002 <br />0.05 <br />0.002 <br />0.03 <br />0.2 <br />0.3 <br />0.05 <br />0.1 <br />5 <br />5.0 <br />0.1 <br />0.1 <br />0.75 <br />0.005 0.01 <br />0.1 0.1 <br />0.05 <br />1.3 1 0.2 <br />0.3 5.0 <br />0.05 0.1 <br />2.5 <br />0.05 0.2 <br />0.01 <br />0.1 <br />5 <br />0.2 <br />0.02 <br />0. 1 <br />2.0 <br />50 <br />15 <br />4 (mrem) /yr 50 pCi/L <br />10 <br />250 <br />500 <br />6.5 -8.5 <br />10 100 <br />6.5 - 8.5 <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 MCL /MCLG is 0; action level is 0.015 <br />(4) EPA Action Level for gross beta particle activity in drinking water is 50 pCi /L <br />Whetstone Associates <br />