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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20559-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-52803 Preparation: 5030B <br /> MS Lab Sample ID: 720-20627-A-2 MS Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220918.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 1420 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 1420 <br /> MSD Lab Sample ID: 720-20627-A-2 MSD Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220919.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 1451 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 1451 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 89 90 60-140 1 20 <br /> EDB 106 110 60-140 4 20 <br /> 1,2,4-Trichlorobenzene 110 107 60-140 3 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 95 95 70-130 <br /> 4-Bromofluoro benzene 95 95 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 96 100 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 27 Of 31 <br />