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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: 720-49896 Preparation: 5030B <br /> MS Lab Sample ID: 720-19425-B-20 MS Analysis Batch: 720-49896 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070921.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2215 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2215 <br /> MSD Lab Sample ID: 720-19425-B-20 MSD Analysis Batch: 720-49896 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070922.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2246 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2246 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 90 89 70- 130 1 20 <br /> EDB 101 107 70- 130 5 20 <br /> 1,2,4-Trichlorobenzene 93 100 70- 130 7 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 97 97 82- 120 <br /> 4-Bromofluorobenzene 97 99 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 104 105 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 97 of 155 <br />