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Quality Control Results <br /> Client: Shaw Environmental& Infrastructure, Inc Job Number: 720-21697-2 <br /> Lab Control Sample/ Method: 8260B <br /> Lab Control Sample Duplicate Recovery Report-Batch: 720-55861 Preparation:50308 <br /> LCS Lab Sample ID: LCS 720-55861/2-A Analysis Batch: 720-55862 Instrument ID: Chemtation 3 <br /> Client Matrix: Solid Prep Batch: 720-55861 Lab File ID: 08170904.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 08/17/2009 0857 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/17/2009 0800 <br /> LCSD Lab Sample ID: LCSD 720-55861/3-A Analysis Batch: 720-55862 Instrument ID: Chemtation 3 <br /> Client Matrix: Solid Prep Batch: 720-55861 Lab File ID: 08170905.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 08/17/2009 0928 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/17/2009 0800 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> 2,2-Dichloropropane 103 _ .....108,.._ 63-130 4 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> 4-Bromofluorobenzene 109 106 52-130 <br /> 1,2-Dichloroethane-d4(Surr) 105 101 67-130 <br /> Toluene-d8(Surr) 99 101 58-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 21 of 25 <br />