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West Elk Mine 2012 Annual Hydrology Report <br />Table 2. Laboratory Parameters for First 5 Years of Monitoring (including <br />Baseline) <br />Springs /Surface Water 3'4 <br />pH (lab and field)' <br />Sodium (Na +) <br />Conductivity at 25 °C (lab and field) <br />Sulfate (SO4-) <br />Temperature (field)' <br />Aluminum (Al) <br />Total Dissolved Solids' <br />Arsenic (As) (Total Recoverable) <br />Total Suspended Solids' <br />Cadmium (Cd) <br />Sodium Adsorption Ratio (SAR) <br />Copper (Cu) <br />Bicarbonate (HCO3 -) <br />Iron (Fe)' (Total and Dissolved) <br />Calcium (Ca +2) <br />Lead (Pb) <br />Chloride (CF) <br />Manganese (Mn)' (Total and Dissolved) <br />Hardness` <br />Mercury (Hg) (Total Recoverable) <br />Magnesium (Mg +?) <br />Molybdenum (Mo) <br />Nitrate — Nitrite <br />Selenium (Se) (Total Recoverable) <br />Phosphate (PO4 -3 as P) <br />Zinc (Zn) <br />Potassium <br />Boron (B) <br />Groundwater <br />pH (lab and field)' <br />Nitrate - Nitrite <br />Conductivity at 25 °C (lab and field)' <br />Phosphate (,PO4-3 as P) <br />Temperature (field)' <br />Potassium <br />Total Dissolved Solids' <br />Turbidity' <br />Sodium Adsorption Ratio (SAR) <br />Sodium (Na) <br />Bicarbonate (HCO3 -) <br />Sulfate (SO4-) <br />Calcium (Ca +2) <br />Arsenic (As) <br />Carbonate (COO <br />Cadmium (Cd) <br />Chloride (CF) <br />Iron (Fe)' (Total and Dissolved) <br />Hardness3 <br />Manganese (Mn)' (Total and Dissolved) <br />Magnesium (M +') <br />Lead (Ph) <br />Ammonia (NH3) <br />Mercury (Hg) <br />Selenium (Se) <br />Zinc (Zn) <br />Boron (B) <br />Notes: <br />1. Parameters monitored as a result of PR -10 <br />2. Added to baseline analyses in 1996, not for analyses completed prior to 1996. <br />3. All metals analyzed for their dissolved form unless stated otherwise. <br />4. North Fork of the Gunnison and Middle Sylvester Gulch expanded parameters include those listed in <br />Table 2 for surface water, plus chromium, nickel, silver (total), cyanide (total), iron (total recoverable) <br />nitrate /nitrite (as N), alkalinity (Total CaCO3), bicarbonate, carbonate, hydroxide; nitrogen (ammonia), <br />phosphorous - ortho, and sodium absorption ratio (SAR). <br />Adapted from CDRMS (2006) <br />June 2013 HydroGeo, Inc. <br />