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Quality Control Results <br /> Client: H2OGeoI Job Number: 720-8838-1 <br /> Matrix Spike/ Method: 8015B <br /> Matrix Spike Duplicate Recovery Report - Batch: 720-20860 Preparation: 3550B <br /> MS Lab Sample ID: 720-8838-1 Analysis Batch: 720-20935 Instrument ID: HP DR05 <br /> Client Matrix: Solid Prep Batch: 720-20860 Lab File ID: N/A <br /> Dilution: 1.0 Initial Weight/Volume: 30.16 g <br /> Date Analyzed: 04/28/2007 0330 Final WeighWolume: 5 mL <br /> Date Prepared: 04/26/2007 1122 Injection Volume: <br /> Column ID: PRIMARY <br /> MSD Lab Sample ID: 720-8838-1 Analysis Batch: 720-20935 Instrument ID: HP DR05 <br /> Client Matrix: Solid Prep Batch: 720-20860 Lab File ID: N/A <br /> Dilution: 1.0 Initial WeightlVolume: 30.14 g <br /> Date Analyzed: 04/28/2007 0357 Final Weight/Volume: 5 mL <br /> Date Prepared: 04/26/2007 1122 Injection Volume: <br /> Column ID: PRIMARY <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Oual MSD Qual <br /> Diesel Range Organics[C10-C28] 78 76 56- 136 2 30 <br /> Surrogate MS% Rec MSD% Rec Acceptance Limits <br /> o-Terphenyl 83 80 50- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 55 of 84 <br />