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Quality Control Results <br /> Client: Secor International, Inc. Job Number: 720-1876-1 <br /> Laboratory Control/ Method: 8260B <br /> Laboratory Control Duplicate Recovery Report-Batch: 720-6120 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-6120/21 Analysis Batch: 720-6120 Instrument ID: Saturn 2100 <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200603\0: <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: <br /> Date Analyzed: 03/01/2006 1031 Final WeighWolume: 10 mL <br /> Date Prepared: 03/01/2006 1031 <br /> LCSD Lab Sample ID:LCSD 720-6120/20 Analysis Batch: 720-6120 Instrument ID: Saturn 2100 <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200603\03( <br /> Dilution: 1.0 Units:ug/Kg Initial WeighWolume: <br /> Date Analyzed: 03/01/2006 1057 Final WeighWolume: 10 mL <br /> Date Prepared: 03/01/2006 1057 <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 94 90 69- 129 4 20 <br /> MTBE 83 92 65- 165 10 20 <br /> Toluene 93 96 70-130 3 20 <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8 94 89 70- 130 <br /> 1,2-Dichloroethane-d4 92 87 60- 140 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 13 of 16 <br />