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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: 720-52803 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-52803/3 Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220908.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 0909 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 0909 <br /> LCSD Lab Sample ID: LCSD 720-52803/4 Analysis Batch: 720-52803 Instrument ID: Chemstation 3.0 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 06220909.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 06/22/2009 0940 Final Weight/Volume: 10 mL <br /> Date Prepared: 06/22/2009 0940 <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) 96 96 70-130 <br /> 4-Bromofluorobenzene 98 95 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 98 97 67-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 25 of 31 <br />