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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 1106 <br />12/21/2005 1109 <br />Laboratory Control/ <br />Laboratory Control Duplicate Recovery Report - Batch: 720-3322 <br />1.0 <br />1.0 <br />Water <br />LCS Lab Sample ID: <br />LCSD Lab Sample ID: <br />Client Matrix: <br />Date Prepared: <br />Units: <br />Instrument ID: <br />Lab File ID: <br />Initial Weight/Volume: <br />Final Weight/Volume: <br />Client Matrix:Water <br />Date Prepared: <br />Units: <br />Instrument ID: <br />Lab File ID: <br />Initial Weight/Volume: <br />Final Weight/Volume: <br />mg/L <br />12/20/2005 1433 <br />Prep Batch: 720-3322 <br />Analysis Batch: 720-3379 <br />50 mL <br />50 mL <br />50 mL <br />50 mL <br />mg/L <br />12/20/2005 1433 <br />Analysis Batch: 720-3379 <br />Prep Batch: 720-3322 <br />Method: 6010B <br />Preparation: 3010A <br />N/A <br />N/A <br />Varian ICP <br />Varian ICP <br />LCS 720-3322/2-A <br />LCSD 720-3322/3-A <br />Analyte LCSD QualLCS QualRPD LimitRPDLimitLCSDLCS <br />% Rec. <br />102102 80 - 120 0 20Antimony <br />100101 80 - 120 0 20Arsenic <br />102102 80 - 120 0 20Barium <br />9898 80 - 120 0 20Beryllium <br />101101 80 - 120 0 20Cadmium <br />101101 80 - 120 0 20Chromium <br />9999 80 - 120 0 20Cobalt <br />101101 80 - 120 0 20Copper <br />100100 80 - 120 0 20Lead <br />105104 80 - 120 1 20Molybdenum <br />100100 80 - 120 0 20Nickel <br />101101 80 - 120 0 20Selenium <br />9999 80 - 120 0 20Silver <br />9999 80 - 120 0 20Thallium <br />100101 80 - 120 0 20Vanadium <br />100100 80 - 120 0 20Zinc <br />STL San Francisco <br />Calculations are performed before rounding to avoid round-off errors in calculated results. <br />Page 15 of 20