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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-24805-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-63481 Preparation: 5030B <br /> MS Lab Sample ID: 720-24786-A-3 MS Analysis Batch: 720-63481 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12240931.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/25/2009 0009 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/25/2009 0009 <br /> MSD Lab Sample ID: 720-24786-A-3 MSD Analysis Batch: 720-63481 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12240932.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/25/2009 0041 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/25/2009 0041 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 105 104 60-140 2 20 <br /> EDB 111 112 60-140 1 20 <br /> 1,2,4-Trichlorobenzene 90 89 60-140 1 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 101 101 70-130 <br /> 4-Bromofluoro benzene 105 106 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 116 117 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 28 Of 40 <br />