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Quality Control Results <br /> Client: ARCADIS U.S., Inc. Job Number: 720-24241-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-61926 Preparation: 5030B <br /> MS Lab Sample ID: 720-24241-3 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230935.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/24/2009 0215 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/24/2009 0215 <br /> MSD Lab Sample ID: 720-24241-3 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230936.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/24/2009 0248 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/24/2009 0248 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,2,3-Trichloropropane 114 120 60-140 5 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 98 96 60-140 2 20 <br /> 1,2,4-Trimethylbenzene 122 122 60-140 0 20 <br /> 1,3,5-Trimethylbenzene 117 117 60-140 0 20 <br /> Vinyl acetate 83 83 40-140 1 20 <br /> Vinyl chloride 95 97 58-140 2 20 <br /> 2,2-Dichloropropane 99 99 60-140 0 20 <br /> Surrogate MS% Rec MSD%Rec Acceptance Limits <br /> 4-Bromofluoro benzene 101 100 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 103 103 67-130 <br /> Toluene-d8(Surr) 100 99 70-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 47 of 52 <br />