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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20107-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-50992 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-50992/2 Analysis Batch: 720-50992 Instrument ID: Varian 3900F <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200905\052609\LS-WA <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/26/2009 1944 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/26/2009 1944 <br /> LCSD Lab Sample ID: LCSD 720-50992/1 Analysis Batch: 720-50992 Instrument ID: Varian 3900F <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: e:\200905\052609\LD-WA <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 40 mL <br /> Date Analyzed: 05/26/2009 2016 Final Weight/Volume: 40 mL <br /> Date Prepared: 05/26/2009 2016 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 1,1-Dichloroethene 83 100 70-130 18 20 <br /> Trichloroethene 89 95 70-130 6 20 <br /> Chlorobenzene 90 99 70-130 9 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 95 93 70-130 <br /> 4-Bromofluorobenzene 91 89 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 87 90 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 14 Of 18 <br />