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Quality Control Results <br />Job Number: 720-1053-1Client: Kennedy/Jenks Consultants <br />Date Analyzed: <br />Date Analyzed: <br />Dilution: <br />Dilution: <br />12/21/2005 1118 <br />12/21/2005 1122 <br />Water <br />Matrix Spike/ <br />Matrix Spike Duplicate Recovery Report - Batch: 720-3322 <br />1.0 <br />1.0 <br />MS Lab Sample ID: <br />MSD Lab Sample ID: <br />Client Matrix: <br />Date Prepared: <br />Date Prepared: <br />Instrument ID: <br />Lab File ID: <br />Initial Weight/Volume: <br />Final Weight/Volume: <br />Instrument ID: <br />Lab File ID: <br />Initial Weight/Volume: <br />Final Weight/Volume: <br />Client Matrix:Water <br />Analysis Batch: 720-3379 <br />Analysis Batch: 720-3379 <br />12/20/2005 1433 <br />12/20/2005 1433 <br />Prep Batch: 720-3322 <br />Prep Batch: 720-3322 <br />50 mL <br />50 mL <br />50 mL <br />50 mL <br />Method: 6010B <br />Preparation: 3010A <br />N/A <br />N/A <br />Varian ICP <br />Varian ICP <br />720-972-A-1-B MS <br />720-972-A-1-C MSD <br />Analyte MSD QualMS QualRPD LimitRPDLimitMSDMS <br />% Rec. <br />103 102 75 - 125 0 25Antimony <br />101 101 75 - 125 0 25Arsenic <br />99 98 75 - 125 1 25Barium <br />99 99 75 - 125 0 25Beryllium <br />97 97 75 - 125 0 25Cadmium <br />99 98 75 - 125 1 25Chromium <br />97 96 75 - 125 0 25Cobalt <br />100 99 75 - 125 0 25Copper <br />96 96 75 - 125 0 25Lead <br />103 103 75 - 125 0 25Molybdenum <br />97 97 75 - 125 0 25Nickel <br />101 101 75 - 125 1 25Selenium <br />98 96 75 - 125 2 25Silver <br />95 95 75 - 125 0 25Thallium <br />99 99 75 - 125 1 25Vanadium <br />96 96 75 - 125 0 25Zinc <br />STL San Francisco <br />Calculations are performed before rounding to avoid round-off errors in calculated results. <br />Page 16 of 20