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• <br />0 <br /> <br />Cotter Corporation PROCEDURE Number: 3-4 <br />Schwartzwalder Mine Page: 5 of 5 <br />Golden, Colorado WATER MONITORING Revision: 6 <br />Date: 01/10/2008 <br />MONITOR WELLS, DOMESTIC WELL AND SUMPS <br />• Seven or eight monitor well locations, depending on ground water elevation, two sump locations <br />and the Domestic Well. <br />• Five or six monitor well locations have a limited analytical suite. Two monitor well locations have <br />an extended suite. The monitor well locations for which the extended suite is requested changes <br />each quarter. <br />• Samples from sump locations are analyzed for dissolved uranium only. Sample size is 125 ml. <br />• Samples from the Domestic Well are analyzed for dissolved U and Ra 226 monthly and for <br />dissolved and suspended U and Ra 226 quarterly. Sample size is 3 liters and it is filtered and <br />acidified. <br />• The limited analytical suite for Monitor Well samples consists of dissolved uranium only. Sample <br />size is 125 ml and it is filtered and acidified. <br />• The extended analytical suite for monitor wells calls for 30 parameters, listed below. Sample size <br />is 1 liter filtered and acidified, 1 liter raw and acidified, and 1 liter raw. <br />MAJOR IONS LDL <br />Alkalinity, Total as CaC03 1.0 mg/L <br />Bicarbonate as HC03 1.0 mg/L <br />Calcium 0.10 mg/L <br />Chloride 3.0 mg/L <br />Magnesium 0.10 mg/L <br />Potassium 0.10 mg/L <br />Sodium 0.10 mg/L <br />Sulfate 5.0 mg/L <br />PHYSICAL PROPERTIES LDL <br />Total Dissolved Solids 10 mg/L <br />METALS TOTAL LDL METALS DISSOLVED LDL <br />Aluminum 0.20 mg/L Aluminum 0.20 mg/L <br />Antimony 0.001 mg/L Antimony 0.001 mg/L <br />Arsenic 0.10 mg/L Copper 0.005 mg/L <br />Copper 0.005 mg/L Iron 0.03 mg/L <br />Lead 0.005 mg/L Manganese 0.01 mg/L <br />Manganese 0.01 mg/L Molybdenum 0.005 mg/L <br />Mercury 0.0001 mg/L Thallium 0.001 mg/L <br />Silver 0.001 mg/L Uranium 0.0002 mg/L <br />Iron 0.03 mg/L <br />Thallium 0.001 mg/L METALS TRIVALENT LDL <br />Zinc 0.005 mg/L Ferric Iron 0.30 mg/L <br />RADIONUCLIDES DISSOLVED LDL <br />Radium 226 0.2 pCi/L <br />Samples collected at monitor wells MW-1, MW-2, and MW-3a during the last month of each <br />quarter are analyzed for both dissolved and suspended U and Ra 226. For this quarterly sample <br />the sample size is increased to 3 liters filtered and acidified.