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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: 720-50211 Preparation: 5030B <br /> MS Lab Sample ID: 720-19558-29 Analysis Batch: 720-50211 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070931.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2326 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2326 <br /> MSD Lab Sample ID: 720-19558-29 Analysis Batch: 720-50211 Instrument ID: Chemstation 3.0 on 95PC <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 05070932.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/07/2009 2358 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/07/2009 2358 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 107 104 70- 130 3 20 <br /> EDB 117 114 70- 130 3 20 <br /> 1,2,4-Trichlorobenzene 105 111 70- 130 5 20 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> Toluene-d8(Surr) 102 105 70- 130 <br /> 4-Bromofluorobenzene 102 104 67- 130 <br /> 1,2-Dichloroethane-d4(Surr) 114 111 67- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 145 of 155 <br />