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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: 720-49558 Preparation: 5030B <br /> MS Lab Sample ID: 720-19405-A-9 MS Analysis Batch: 720-49558 Instrument ID: Saturn 21<3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050209\S, <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/02/2009 1430 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/02/2009 1430 <br /> MSD Lab Sample ID: 720-19405-A-9 MSD Analysis Batch: 720-49558 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200905\050209\SA <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/02/2009 1502 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/02/2009 1502 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 90 82 70- 130 8 20 <br /> Trichloroethene 76 83 70- 130 1 20 4 4 <br /> Chlorobenzene 109 106 70- 130 3 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 100 96 82- 120 <br /> 4-Bromofluorobenzene 109 102 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 84 82 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 35 of 53 <br />