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Quality Control Results <br /> Client: Shaw Environmental & Infrastructure, Inc Job Number: 720-21697-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-55224 Preparation: 5030B <br /> MS Lab Sample ID: 720-21697-13 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050924.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 2041 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 2041 <br /> MSD Lab Sample ID: 720-21697-13 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050925.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 2113 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 2113 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,2,3-Trichloropropane 99 102 60-140 4 20 <br /> 1,1,2-Trichloro-1,2,2-trifluoroethane 100 100 60-140 0 20 <br /> 1,2,4-Trimethylbenzene 102 104 60-140 2 20 <br /> 1,3,5-Trimethylbenzene 99 100 60- 140 2 20 <br /> Vinyl acetate 90 92 40-140 2 20 <br /> Vinyl chloride 87 86 58- 140 2 20 <br /> 2,2-Dichloropropane 100 100 60- 140 1 20 <br /> Surrogate MS% Rec MSD%Rec Acceptance Limits <br /> 4-Bromofluorobenzene 101 98 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 100 96 67-130 <br /> Toluene-d8(Surr) 100 98 70-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 48 of 63 08/17/2009 <br />