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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: 720-17547 Preparation: 5030B <br /> MS Lab Sample ID. 720-7408-11 Analysis Batch: 720-17547 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200701\( <br /> Dilution: 20 Initial Weight/Volume: 40 mL <br /> Date Analyzed. 01/24/2007 1813 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/24/2007 1813 <br /> MSD Lab Sample ID: 720-7408-11 Analysis Batch: 720-17547 Instrument ID: Saturn 39008 <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: 01/24/2007 2016 Final Weight/Volume: 40 mL <br /> Date Prepared: 01/24/2007 2016 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Benzene 84 87 69- 129 2 20 <br /> MTBE 74 57 65- 165 7 20 <br /> Toluene 83 89 70-130 2 20 <br /> Surrogate _ MS%Rec MSD% Rec Acceptance Limits <br /> Toluene-d8(Surr) 93 94 77-121 <br /> 1,2-Dichloroethane-d4(Surr) 94 76 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 42 of 63 <br />