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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20072-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-50705 Preparation: 5030B <br /> MS Lab Sample ID: 720-19976-A-28 MS Analysis Batch: 720-50705 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200905\052009\SA-W/ <br /> Dilution: 200 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/20/2009 1714 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/20/2009 1714 <br /> MSD Lab Sample ID: 720-19976-A-28 MSD Analysis Batch: 720-50705 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200905\052009\SA-WA <br /> Dilution: 200 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/20/2009 1747 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/20/2009 1747 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 106 105 70- 130 1 20 <br /> Trichloroethene 58 -6 70- 130 6 20 4 4 <br /> Chlorobenzene 107 107 70- 130 0 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 105 109 70- 130 <br /> 4-Bromofluorobenzene 99 102 67- 130 <br /> 1,2-Dichloroethane-d4(Surr) 103 105 67- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 11 of 13 <br />