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Quality Control Results <br />Job Number: 720-1325-1Client: Kennedy/Jenks Consultants <br />Date Analyzed: <br />Date Analyzed: <br />Dilution: <br />Dilution: <br />01/12/2006 0955 <br />01/12/2006 0959 <br />Water <br />Matrix Spike/ <br />Matrix Spike Duplicate Recovery Report - Batch: 720-4177 <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: 720-4235 <br />Analysis Batch: 720-4235 <br />01/11/2006 1202 <br />01/11/2006 1202 <br />Prep Batch: 720-4177 <br />Prep Batch: 720-4177 <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 />720-1325-1 <br />720-1325-1 <br />Analyte MSD QualMS QualRPD LimitRPDLimitMSDMS <br />% Rec. <br />47 49 75 - 125 3 25 **Antimony <br />97 98 75 - 125 1 25Arsenic <br />87 93 75 - 125 2 25Barium <br />98 99 75 - 125 1 25Beryllium <br />89 90 75 - 125 1 25Cadmium <br />91 92 75 - 125 1 25Chromium <br />89 91 75 - 125 1 25Cobalt <br />98 98 75 - 125 0 25Copper <br />89 90 75 - 125 1 25Lead <br />91 93 75 - 125 1 25Molybdenum <br />90 91 75 - 125 1 25Nickel <br />98 98 75 - 125 0 25Selenium <br />99 100 75 - 125 1 25Silver <br />86 87 75 - 125 2 25Thallium <br />92 94 75 - 125 2 25Vanadium <br />87 88 75 - 125 1 25Zinc <br />STL San Francisco <br />Calculations are performed before rounding to avoid round-off errors in calculated results. <br />Page 77 of 81