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i <br /> r <br /> Quality Control Results <br /> Client: TRC Solutions Job Number: 720-521-2 <br /> Method Blank - Batch: 720-2763 Method: 8260B <br /> Preparation: 6030B <br /> Lab Sample ID:MB 720-276315 Analysis Batch: 720-2763 Instrument ID:Varian 390OF <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsatumwsldata120051211: <br /> Dilution: 1.0 Units: ug/L Initial WeightlVolume:40 mL <br /> Date Analyzed: 12/08/2005 1204 Final Weight/Volume:40 mL <br /> Date Prepared: 12/08/2005 1204 <br /> Analyte Result Qual, RL <br /> Acetone ND 50 <br /> Surrogate % Rec Acceptance Limits <br /> 4-Bromofluorobenzene 110 79 - 118 <br /> 1,2-Dichloroethane-d4 104 78 - 117. <br /> Toluene-d8 118 77 - 121 <br /> Laboratory Control Sample - Batch: 720-2763 Method: 826013 <br /> Preparation: 5030B <br /> Lab Sample ID:LCS 720-276314 Analysis Batch: 720-2763 Instrument ID:Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:lsatumwsldata120051211. <br /> Dilution: 1.0 Units:ug/L Initial WeightlVolume:40 mL <br /> Date Analyzed: 12/08/2005 1131 Final Weight(Volume:40 mL <br /> Date Prepared: 12/08/2005 1131 <br /> Analyte Spike Amount Result % Rec. Limit Qual <br /> Benzene 20.0 17 85 69 - 129 <br /> Chlorobenzene 20.0 19 94 61 - 121 <br /> 1 1-Dichloroethene 20.0 16 79 65 - 125 <br /> Toluene 20.0 17 87 70 - 130 <br /> Trichloroethene 20.0 17 87 74 - 134 <br /> Surrogate % Rec Acceptance Limits <br /> 4-Bromofluorobe nzene 113 79 - 118 <br /> 1,2-Dichloroethane-t4 97 78 - 117 <br /> Toluene-d8 110 77 - 121 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 9 of 13 <br /> I <br />