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Quality Control Results <br />Job Number: 720-993-1Client: Kennedy/Jenks Consultants <br />Solid <br />1.0 <br />12/25/2005 0905Date Analyzed: <br />Laboratory Control Sample - Batch: 720-3639 <br />Client Matrix: <br />Lab Sample ID: <br />Dilution: <br />Date Prepared: <br />Instrument ID: <br />Lab File ID: <br />Initial Weight/Volume: <br />Final Weight/Volume: <br />122505003.D <br />12/25/2005 0905 <br />Analysis Batch: 720-3639 <br />Prep Batch: N/A <br />5 g <br />10 mL <br />Units:ug/Kg <br />Method: 8260B <br />Preparation: 5030B <br />Latest ChemstationLCS 720-3639/1 <br />Analyte QualLimit% Rec.ResultSpike Amount <br />100 94 94 69 - 129Benzene <br />100 95 95 61 - 121Chlorobenzene <br />100 77 77 65 - 1251,1-Dichloroethene <br />100 94 94 70 - 130Toluene <br />100 91 91 74 - 134Trichloroethene <br />Surrogate % Rec Acceptance Limits <br />4-Bromofluorobenzene 109 60 - 140 <br />1,2-Dichloroethane-d4 103 60 - 140 <br />Toluene-d8 107 70 - 130 <br />STL San Francisco <br />Calculations are performed before rounding to avoid round-off errors in calculated results. <br />Page 107 of 141