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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19425-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-49654 Preparation: 5030B <br /> MS Lab Sample ID: 720-19482-A-1 MS Analysis Batch: 720-49654 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050409\S, <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/04/2009 1858 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/04/2009 1858 <br /> MSD Lab Sample ID: 720-19482-A-1 MSD Analysis Batch: 720-49654 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050409\SA <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/04/2009 1932 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/04/2009 1932 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 92 90 70- 130 2 20 <br /> Trichloroethene 90 120 70- 130 6 20 4 4 <br /> Chlorobenzene 106 103 70- 130 2 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 98 100 82- 120 <br /> 4-Bromofluorobenzene 98 85 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 89 100 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 44 of 53 <br />