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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: 720-63441 Preparation: 5030B <br /> MS Lab Sample ID: 720-24769-A-18 MS Analysis Batch: 720-63441 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230931.D <br /> Dilution: 100 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 0102 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 0102 <br /> MSD Lab Sample ID: 720-24769-A-18 MSD Analysis Batch: 720-63441 Instrument ID: ChemStation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 12230932.D <br /> Dilution: 100 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 12/24/2009 0133 Final Weight/Volume: 10 mL <br /> Date Prepared: 12/24/2009 0133 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 107 105 60-140 2 20 <br /> EDB 109 113 60-140 4 20 <br /> 1,2,4-Trichlorobenzene 97 99 60-140 3 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 107 107 70-130 <br /> 4-Bromofluoro benzene 111 110 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 106 108 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 18 Of 40 <br />