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Quality Control Results <br /> Client: SECOR International, Inc. Job Number: 720-7408-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-17632 Preparation: 5030B <br /> MS Lab Sample ID: 720-7408-11 Analysis Batch: 720-17632 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200701\I <br /> Dilution: 20 Initial WeighWolume: 40 mL <br /> Date Analyzed: 01/26/2007 1248 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/26/2007 1248 <br /> MSD Lab Sample ID: 720-7408-11 Analysis Batch: 720-17632 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID. c:\saturnws\data\200701\01 <br /> Dilution: 20 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 01/26/2007 1315 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/26/2007 1315 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Benzene 73 80 69-129 4 20 <br /> MTBE 85 119 65- 165 3 20 4 4 <br /> Toluene 75 82 70- 130 4 20 <br /> Surrogate MS% Rec MSD%Rec Acceptance Limits <br /> Toluene-d8(Surr) 106 105 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 114 105 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 45 of 63 <br />