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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-19558-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-49944 Preparation: 5030B <br /> MS Lab Sample ID: 720-19546-B-1 MS Analysis Batch: 720-49944 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050609\S, <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1452 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1452 <br /> MSD Lab Sample ID: 720-19546-B-1 MSD Analysis Batch: 720-49944 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\050609\SA <br /> Dilution: 4.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/06/2009 1525 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/06/2009 1525 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 101 65 70- 130 43 20 F <br /> EDB 87 79 70- 130 10 20 <br /> 1,2,4-Trichlorobenzene 110 82 70- 130 28 20 F <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 101 86 82- 120 <br /> 4-Bromofluorobenzene 93 81 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 88 84 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 107 of 155 <br />