2009-08-10_GENERAL DOCUMENTS - M1977300 (3)

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Cotter Corporation PROCEDURE Number: 3-4 Schwartzwalder Mine Page: 4 of 5 Golden, Colorado WATER MONITORING Revision: 6 Date: 01/10/2008 Schwartzwalder Water Sampling Program June 22, 2007 • Surface and ground water sampling at the Schwartzwalder Mine is carried out on a monthly schedule. Three different analytical strategies are required for the samples, each strategy is detailed below. In addition there have been quarterly samples collected of the mine refill water. SURFACE WATER • Six sampling locations. • Four locations have a limited analytical suite. Two locations have an extended suite. The locations for which the extended suite is requested changes each month. • The limited analytical suite calls for dissolved and suspended U and Ra 226. Sample size is 3 liters that is filtered and acidified. • The extended analytical suite calls for 30 parameters, listed below. Sample size is 3 liters that is filtered and acidified, plus 1 liter filtered and acidified, 1 liter raw and acidified, and 1 liter raw. Samples collected during the last month of each quarter are analyzed for both dissolved and suspended U and Ra 226. MAJOR IONS Alkalinity, Total as CaC03 Bicarbonate as HC03 Calcium Chloride Magnesium Potassium Sodium Sulfate PHYSICAL PROPERTIES Total Dissolved Solids METALS TOTAL Aluminum Antimony Arsenic Copper Lead Manganese Mercury Silver Iron Thallium Zinc RADIONUCLIDES DISSOLVED Radium 226 LDL 1.0 mg/L 1.0 mg/L 0.10 mg/L 3.0 mg/L 0.10 mg/L 0.10 mg/L 0.10 mg/L 5.0 mg/L LDL 10 mg/L LDL 0.20 mg/L 0.001 mg/L 0.10 mg/L 0.005 mg/L 0.005 mg/L 0.01 mg/L 0.0001 mg/L 0.001 mg/L 0.03 mg/L 0.001 mg/L 0.005 mg/L LDL 0.2 pCi/L METALS DISSOLVED LDL Aluminum Antimony Copper Iron Manganese Molybdenum Thallium Uranium 0.20 mg/L 0.001 mg/L 0.005 mg/L 0.03 mg/L 0.01 mg/L 0.005 mg/L 0.001 mg/L 0.0002 mg/L METALS TRIVALENT LDL Ferric Iron 0.30 mg/L