2010-08-02_REVISION - M1977300 (32)

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• Cotter Corporation PROCEDURE Number: 34 Schwartzwalder Mine Page: 6 of 9 Golden, Colorado WATER MONITORING Revision: 8 Date: 08/01/2010 TABLE 2: GROUNDWATER SAMPLING -ANALYTICAL PARAMETERS 11 C Ground Water Quality Parameter Unit LLD Sample Volume Preservative Field Filtered General Pro erdes Total Dissolved Solids TDS m /L 10 500mL Cool to 4°C Yes Total Suspended Solids TSS l m /L 4.0 1 Liter Cool to 4°C No Temperature field measured °C Field measured No No Conductivity field measured us Field measured No No pH field measured S.U. Field measured No No Ma'or Ions Alkalinity (total as CaC03) mg/L 1.0 500mL Cool to 4°C No Bicarbonate (as HC03) mg/L 1.0 500m L Cool to 4°C No Calcium mg/L 0.10 250mL HN03 Yes Chloride m /L 3.0 500m L Cool to 4°C No Fluoride' m /L 0.1 500m L Cool to 4°C No Magnesium mg/L 0.10 250mL HN03 Yes Potassium mg/L 0.10 250mL HN03 Yes Sodium mg/L 0.10 250mL HN03 Yes Sulfate m /L 5.0 500m L Cool to 4°C No Nut?lents Nitrate+Nitrite mg/L 0.1 250mL H2SO4& Cool to 4°C No Phosphorus mg/L 0.01 250m L H2SO4 & Cool to 4°C No Metals Total Aluminum mg/L 0.20 HNO3 No Antimony mg/L 0.001 HN03 No Arsenic mg/L 0.10 HN03 No Copper mg/L 0.005 HN03 No Iron mg/L 0.03 HN03 No Lead mg/L 0.005 250mL HN03 No Manganese mg1L 0.01 HN03 No Mercury mg/L 0.0001 HN03 No Silver mg/L 0.001 HN03 No Thallium mg/L 0.001 HN03 No Zinc mg/L 0.005 ?_HN03 No Metals Dissolved Aluminum mg/L 0.20 HNO3 Yes Antimony mg/L 0.001 HN03 Yes Arsenic mg/L 0.10 HN03 Yes Copper mg/L 0.005 HN03 Yes Iron mg/L 0.03 HN03 Yes Manganese mg/L 0.01 HNO3 Yes Molybdenum mg/L 0.005 250mL HNO3 Yes Mercury mg/L 0.0001 HN03 Yes Silver mg/L 0.001 HN03 Yes Thallium mg/L 0.001 HN03 Yes Uranium mg/L 0.0002 HN03 Yes Zinc mg/L 0.005 HN03 Yes R adionuclides Total Gross Alpha pCi/L 2 Lit HN03 No Gross Beta pCi/L er HN03 No Rad ionuclides Dissolved. Radium 226 pCi/L 0.2 2 Liter HN03 Yes 'Mine Refill Water Only 2Monitoring Wells, Domestic Well, and Sumps Only