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Quality Control Results <br />Job Number: 720-915-1Client: Kennedy/Jenks Consultants <br />SolidClient Matrix: <br />1.0Dilution: <br />Date Analyzed: <br />Lab Sample ID: <br />12/13/2005 1219 <br />Method Blank - Batch: 720-3048 <br />Date Prepared: <br />Instrument ID: <br />Lab File ID: <br />Initial Weight/Volume: <br />Final Weight/Volume: <br />Injection Volume: <br />Analysis Batch: 720-3048 <br />Prep Batch: N/A <br />12/13/2005 1219 <br />5 g <br />10 mL <br />Units:mg/Kg <br />Column ID:PRIMARY <br />Method: 8021B <br />Preparation: 5030B <br />N/A <br />GC 5MB 720-3048/1 <br />Analyte Result Qual RL <br />ND 0.0050Benzene <br />ND 0.0050Toluene <br />ND 0.0050Ethylbenzene <br />ND 0.0050Xylenes, Total <br />Surrogate % Rec Acceptance Limits <br />a,a,a-Trifluorotoluene (pid)104 58 - 124 <br />4-Bromofluorobenzene 97 58 - 124 <br />Solid <br />1.0 <br />12/13/2005 1246Date Analyzed: <br />Laboratory Control Sample - Batch: 720-3048 <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 />Injection Volume:12/13/2005 1246 <br />Analysis Batch: 720-3048 <br />Prep Batch: N/A <br />5 g <br />10 mL <br />Units:mg/Kg <br />Column ID:PRIMARY <br />Method: 8021B <br />Preparation: 5030B <br />N/A <br />GC 5LCS 720-3048/2 <br />Analyte QualLimit% Rec.ResultSpike Amount <br />0.101 0.11 108 77 - 123Benzene <br />0.101 0.10 104 78 - 122Toluene <br />0.101 0.10 100 70 - 130Ethylbenzene <br />0.305 0.31 101 75 - 125Xylenes, Total <br />Surrogate % Rec Acceptance Limits <br />a,a,a-Trifluorotoluene (pid)106 58 - 124 <br />4-Bromofluorobenzene 95 58 - 124 <br />STL San Francisco <br />Calculations are performed before rounding to avoid round-off errors in calculated results. <br />Page 62 of 72