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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-30698-1 <br /> Matrix Spike/ Method: 8260B/CA_LUFTMS <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-79016 Preparation: 5030B <br /> MS Lab Sample ID: 720-30772-B-3 MS Analysis Batch: 720-79016 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09301019.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/30/2010 1859 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/30/2010 1859 <br /> MSD Lab Sample ID: 720-30772-B-3 MSD Analysis Batch: 720-79016 Instrument ID: HP9 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 09301020.D <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 09/30/2010 1933 Final Weight/Volume: 10 mL <br /> Date Prepared: 09/30/2010 1933 <br /> %Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Tetrachloroethene 88 87 60-140 1 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 95 96 70-130 <br /> 4-Bromofluorobenzene 96 96 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 99 99 67-130 <br /> TestAmerica San Francisco Page 21 of 23 <br />