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Quality Control Results <br /> Client: Secor International, Inc. Job Number: 720-1876-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-6120 Preparation: 50308 <br /> MS Lab Sample ID: 720-2258-A-1 MS Analysis Batch: 720-6120 Instrument ID: Saturn 2100 <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200603\( <br /> Dilution: 1.0 Initial WeightfVolume: 5.37 g <br /> Date Analyzed: 03/01/2006 1221 Final Weight/Volume: 10 mL <br /> Date Prepared: 03/01/2006 1221 <br /> MSD Lab Sample ID: 720-2258-A-1 MSD Analysis Batch: 720-6120 Instrument ID: Saturn 2100 <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200603\0f <br /> Dilution: 1.0 Initial WeighWolume: 5.40 g <br /> Date Analyzed: 03/01/2006 1247 Final Weight/Volume: 10 mL <br /> Date Prepared: 03/01/2006 1247 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qua[ MSD Qual <br /> Benzene 98 99 69-129 0 20 <br /> MTBE 101 101 65-165 0 20 <br /> Toluene 81 82 70- 130 1 20 <br /> Surrogate MS%Rec MSD%Rec Acceptance Limits <br /> Toluene-d8 79 89 70- 130 <br /> 1,2-Dich[oroethane-d4 102 101 60-140 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 14 of 16 <br />