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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-18553-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-47926 Preparation: 5030B <br /> MS Lab Sample ID: 720-18555-B-4 MS Analysis Batch: 720-47926 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200903\032309\SA-W/ <br /> Dilution: 1.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 03/23/2009 1132 Final Weight/Volume: 40 mL <br /> Date Prepared: 03/23/2009 1132 <br /> MSD Lab Sample ID: 720-18555-C-4 MSD Analysis Batch: 720-47926 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200903\032309\SA-WA <br /> Dilution: 1.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 03/23/2009 1204 Final Weight/Volume: 40 mL <br /> Date Prepared: 03/23/2009 1204 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 107 102 70- 130 4 20 <br /> Trichloroethene 100 97 70- 130 3 20 <br /> Chlorobenzene 101 96 70- 130 5 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 97 109 82- 120 <br /> 4-Bromofluorobenzene 87 99 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 99 104 76- 132 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 13 of 15 <br />