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Quality Control Results <br /> Client: Geomatrix Consultants Inc. Job Number: 720-10502-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report- Batch: 720-25454 Preparation: 5030B <br /> MS Lab Sample ID: 720-10493-B-4 MS Analysis Batch: 720-25454 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: 08/29/2007 1523 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/29/2007 1523 <br /> MSD Lab Sample ID: 720-10493-C-4 MSD Analysis Batch: 720-25454 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: 08/29/2007 1550 Final Weight/Volume: 40 mL <br /> Date Prepared: 08/29/2007 1550 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Benzene 120 98 69- 129 20 20 <br /> Toluene 125 100 70- 130 21 20 F <br /> Surrogate MS % Rec MSD% Rec Acceptance Limits <br /> Toluene-d8(Surr) 105 105 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 64 X 105 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 22 of 44 09/04/2007 <br />