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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-9471-1 <br /> Matrix Spike/ Method: 8015B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-22689 Preparation: 3550B <br /> MS Lab Sample ID: 720-9471-19 Analysis Batch: 720-22817 Instrument ID: Varian DRO4 <br /> Client Matrix: Solid Prep Batch: 720-22689 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 30.05 g <br /> Date Analyzed: 06/15/2007 1938 Final Weight/Volume: 5 mL <br /> Date Prepared: 06/14/2007 1215 Injection Volume: <br /> Column ID: PRIMARY <br /> MSD Lab Sample ID: 720-9471-19 Analysis Batch: 720-22817 Instrument ID: Varian DRO4 <br /> Client Matrix: Solid Prep Batch: 720-22689 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 30.10 g <br /> Date Analyzed: 06/15/2007 2002 Final Weight/Volume: 5 mL <br /> Date Prepared: 06/14/2007 1215 Injection Volume: <br /> Column ID: PRIMARY <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Diesel Range Organics[C10-C28] 71 66 50- 130 7 30 <br /> Surrogate MS% Rec MSD % Rec Acceptance Limits <br /> o-Terphenyl 82 78 46- 105 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 53 of 56 06/19/2007 <br />