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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-24852-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-63621 Preparation: 5030B <br /> MS Lab Sample ID: 720-24852-2 Analysis Batch: 720-63621 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12300915.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/30/2009 1630 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/30/2009 1630 <br /> MSD Lab Sample ID: 720-24852-2 Analysis Batch: 720-63621 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12300916.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/30/2009 1701 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/30/2009 1701 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 98 103 60-140 5 20 <br /> EDB 118 120 60-140 2 20 <br /> 1,2,4-Trichlorobenzene 108 113 60-140 5 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 99 100 70-130 <br /> 4-Bromofluoro benzene 107 107 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 123 121 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 19 Of 26 <br />