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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-10473-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-25442 Preparation: 5030B <br /> MS Lab Sample ID: 720-10447-B-8 MS Analysis Batch: 720-25442 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200708\1 <br /> Dilution: 1.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 08/26/2007 1308 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/26/2007 1308 <br /> MSD Lab Sample ID: 720-10447-C-8 MSD Analysis Batch: 720-25442 Instrument ID: Saturn 3900B <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200708\0£ <br /> Dilution: 1.0 Initial Weight/Volume: 40 mL <br /> Date Analyzed: 08/26/2007 1334 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/26/2007 1334 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Benzene 99 89 69- 129 11 20 <br /> Toluene 99 91 70- 130 9 20 <br /> Surrogate MS% Rec MSD% Rec Acceptance Limits <br /> Toluene-d8(Surr) 105 104 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 109 5 X 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 32 of 50 09/10/2007 <br />