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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19656-1 <br /> Matrix Spike - Batch: 720-49965 Method: 7199 <br /> Preparation: N/A <br /> Lab Sample ID: 720-19656-3 Analysis Batch: 720-49965 Instrument ID: No Equipment Assigned <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: N/A <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 50 mL <br /> Date Analyzed: 05/06/2009 0940 Final Weight/Volume: 50 mL <br /> Date Prepared: N/A <br /> Analyte Sample Result/Qual Spike Amount Result % Rec. Limit Qual <br /> Cr(VI) ND 5.00 5.64 113 80- 120 ^ <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 64 of 74 <br />