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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: 720-50035 Preparation: 5030B <br /> MS Lab Sample ID: 720-19662-A-14 MS Analysis Batch: 720-50035 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\051109\S, <br /> Dilution: 5.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/11/2009 1317 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/11/2009 1317 <br /> MSD Lab Sample ID: 720-19662-A-14 MSD Analysis Batch: 720-50035 Instrument ID: Varian 390OG <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\data\200905\051109\SA <br /> Dilution: 5.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/11/2009 1351 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/11/2009 1351 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 117 121 70- 130 3 20 <br /> EDB 99 110 70- 130 10 20 <br /> 1,2,4-Trichlorobenzene 100 104 70- 130 5 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 77 X 105 82- 120 <br /> 4-Bromofluorobenzene 89 104 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 83 108 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 141 of 155 <br />