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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20107-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-50992 Preparation: 5030B <br /> MS Lab Sample ID: 720-20050-A-4 MS Analysis Batch: 720-50992 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200905\052609\SA-WA <br /> Dilution: 1.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/26/2009 2224 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/26/2009 2224 <br /> MSD Lab Sample ID: 720-20050-A-4 MSD Analysis Batch: 720-50992 Instrument ID: Varian 390OF <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200905\052609\SA-WA <br /> Dilution: 1.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/26/2009 2256 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/26/2009 2256 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> 1,1-Dichloroethene 99 93 70-130 3 20 <br /> Trichloroethene 101 98 70-130 4 20 <br /> Chlorobenzene 103 101 70-130 2 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 93 102 70-130 <br /> 4-Bromofluoro benzene 87 98 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 92 102 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 15 of 18 <br />