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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19040-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-49017 Preparation: 5030B <br /> MS Lab Sample ID: 720-19021-B-4 MS Analysis Batch: 720-49017 Instrument ID: Saturn 21<3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200904\042209\S, <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 04/22/2009 1042 Final Weight/Volume: 40 mL <br /> Date Prepared: 04/22/2009 1042 <br /> MSD Lab Sample ID: 720-19021-B-4 MSD Analysis Batch: 720-49017 Instrument ID: Saturn 2K3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: d:\data\200904\042209\SA <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 04/22/2009 1114 Final Weight/Volume: 40 mL <br /> Date Prepared: 04/22/2009 1114 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 100 87 70- 130 13 20 <br /> Trichloroethene 129 139 70- 130 1 20 4 4 <br /> Chlorobenzene 116 107 70- 130 8 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 92 95 82- 120 <br /> 4-Bromofluorobenzene 92 96 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 83 86 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 64 of 69 <br />