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Quality Control Results <br />Job Number: 720-1027-1Client: Kennedy/Jenks Consultants <br />Date Analyzed: <br />Date Analyzed: <br />Dilution: <br />Dilution: <br />12/22/2005 1359 <br />12/22/2005 1403 <br />Solid <br />Matrix Spike/ <br />Matrix Spike Duplicate Recovery Report - Batch: 720-3385 <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:Solid <br />Analysis Batch: 720-3436 <br />Analysis Batch: 720-3436 <br />12/21/2005 1439 <br />12/21/2005 1439 <br />Prep Batch: 720-3385 <br />Prep Batch: 720-3385 <br />1.04 g <br />50 mL <br />1.05 g <br />50 mL <br />Method: 6010B <br />Preparation: 3050B <br />N/A <br />N/A <br />Varian ICP <br />Varian ICP <br />720-1027-14 <br />720-1027-14 <br />Analyte MSD QualMS QualRPD LimitRPDLimitMSDMS <br />% Rec. <br />30 29 75 - 125 4 20 N NAntimony <br />97 95 75 - 125 2 20Arsenic <br />121 143 75 - 125 5 20 NBarium <br />100 100 75 - 125 2 20Beryllium <br />93 91 75 - 125 3 20Cadmium <br />95 93 75 - 125 2 20Chromium <br />93 91 75 - 125 3 20Cobalt <br />100 69 75 - 125 19 20 NCopper <br />82 53 75 - 125 20 20 NLead <br />91 87 75 - 125 6 20Molybdenum <br />91 89 75 - 125 2 20Nickel <br />95 93 75 - 125 3 20Selenium <br />101 100 75 - 125 2 20Silver <br />86 86 75 - 125 1 20Thallium <br />96 90 75 - 125 5 20Vanadium <br />76 64 75 - 125 7 20 NZinc <br />STL San Francisco <br />Calculations are performed before rounding to avoid round-off errors in calculated results. <br />Page 334 of 347