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Quality Control Results <br /> Client: Environmental Cost Management, Inc. Job Number: 720-20559-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-52615 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-52615/3 Analysis Batch: 720-52615 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06210903.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/21/2009 0931 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/21/2009 0931 <br /> LCSD Lab Sample ID: LCSD 720-52615/4 Analysis Batch: 720-52615 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06210904.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/21/2009 1002 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/21/2009 1002 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 95 95 70-130 <br /> 4-Bromofluorobenzene 95 94 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 98 96 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 20 Of 31 <br />