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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-18980-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-48688 Preparation: 5030B <br /> MS Lab Sample ID: 720-18974-B-3 MS Analysis Batch: 720-48688 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200904\041609\SA-W/ <br /> Dilution: 5.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 04/16/2009 1412 Final Weight/Volume: 40 mL <br /> Date Prepared: 04/16/2009 1412 <br /> MSD Lab Sample ID: 720-18974-B-3 MSD Analysis Batch: 720-48688 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200904\041609\SA-WA <br /> Dilution: 5.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 04/16/2009 1444 Final Weight/Volume: 40 mL <br /> Date Prepared: 04/16/2009 1444 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 96 98 70- 130 2 20 <br /> Trichloroethene -529 -537 70- 130 6 20 4 4 <br /> Chlorobenzene 102 100 70- 130 1 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 98 104 82- 120 <br /> 4-Bromofluorobenzene 95 96 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 99 103 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 12 of 25 <br />