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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: 720-49980 Preparation: 5030B <br /> MS Lab Sample ID: 720-19554-A-6 MS Analysis Batch: 720-49980 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05090911.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/09/2009 1324 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/09/2009 1324 <br /> MSD Lab Sample ID: 720-19554-A-6 MSD Analysis Batch: 720-49980 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05090912.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/09/2009 1355 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/09/2009 1355 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 100 94 70- 130 6 20 <br /> EDB 108 111 70- 130 3 20 <br /> 1,2,4-Trichlorobenzene 130 126 70- 130 3 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 103 100 82- 120 <br /> 4-Bromofluorobenzene 110 110 74- 131 <br /> 1,2-Dichloroethane-d4(Surr) 105 104 72- 125 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 126 of 155 <br />