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Quality Control Results <br /> Client: ARCADIS U.S., Inc. Job Number: 720-24241-1 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-61926 Preparation: 5030B <br /> LCS Lab Sample ID: LCS 720-61926/4 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230927.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/23/2009 2157 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/23/2009 2157 <br /> LCSD Lab Sample ID: LCSD 720-61926/5 Analysis Batch: 720-61926 Instrument ID: Agilent 75MSD <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 11230928.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/23/2009 2229 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/23/2009 2229 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 2,2-Dichloropropane 105 105 78-140 0 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> 4-Bromofluorobenzene 101 100 67-130 <br /> 1,2-Dichloroethane-d4(Surr) 103 101 67-130 <br /> Toluene-d8(Surr) 100 99 70-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 44 of 52 <br />