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Quality Control Results <br /> Client: SECOR International, Inc. Job Number: 720-7714-1 <br /> C <br /> Lab Control Spike/ Method: 8260B <br /> Lab Control Spike Duplicate Recovery Report-Batch: 720-18249 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-18249/2-AA Analysis Batch: 720-18250 Instrument ID: Varian 3900A <br /> Client Matrix: Solid Prep Batch: 720-18249 Lab File ID: c:\saturnws\data\200702\0: <br /> Dilution: 200 Units: mg/Kg Initial Weight/Volume: 5.04 g <br /> Date Analyzed: 02/13/2007 2255 Final Weight/Volume: 10 mL <br /> Date Prepared: 02/13/2007 0945 <br /> LCSD Lab Sample ID:LCSD 720-18249/3-AA Analysis Batch: 720-18250 Instrument ID: Varian 3900A j <br /> Client Matrix: Solid Prep Batch: 720-18249 Lab File ID: c:\saturnws\data\200702\021 <br /> Dilution: 200 Units: mg/Kg Initial Weight/Volume: 5.03 g <br /> Date Analyzed: 02/13/2007 2317 Final Weight/Volume: 10 mL <br /> Date Prepared: 02/13/2007 0945 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 80 86 69-129 7 _.20 <br /> Toluene 89 97 70-130 8 20 <br /> (` MTBE 98 102 65-165 4 20 <br /> If••i Surrogate LCS% Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8(Burr) _..� ��- 97 112 50- 130 <br /> 1,2-Dichloroethane-d4(Surr) 103 116 60-140 <br /> I <br /> �.1 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 18 of 21 <br />