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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19656-1 <br /> Method Blank- Batch: 500-63461 Method: 6020 <br /> Preparation: 3005A <br /> Total Recoverable <br /> Lab Sample ID: MB 500-63461/1-A Analysis Batch: 500-63840 Instrument ID: ThermoElectron ICP-MS <br /> Client Matrix: Water Prep Batch: 500-63461 Lab File ID: N/A <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 50 mL <br /> Date Analyzed: 05/14/2009 1525 Final Weight/Volume: 50 mL <br /> Date Prepared: 05/11/2009 0830 <br /> Analyte Result Qual RL <br /> Cadmium ND 0.50 <br /> Copper ND 2.0 <br /> Nickel ND 2.0 <br /> Silver ND 0.50 <br /> Thallium ND ^ 2.0 <br /> Tin ND 5.0 <br /> Method Blank- Batch: 500-63461 Method: 6020 <br /> Preparation: 3005A <br /> Total Recoverable <br /> Lab Sample ID: MB 500-63461/1-A Analysis Batch: 500-63938 Instrument ID: ThermoElectron ICP-MS <br /> Client Matrix: Water Prep Batch: 500-63461 Lab File ID: N/A <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 50 mL <br /> Date Analyzed: 05/15/2009 1400 Final Weight/Volume: 50 mL <br /> Date Prepared: 05/11/2009 0830 <br /> Analyte Result Qual RL <br /> Lead ND 0.50 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 58 of 74 <br />