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1 <br /> Quality Control Results <br /> Client TRC Solutions Job Number 720-1604-1 <br /> Matrix Spike/ Method 8260E <br /> Matrix Spike Duplicate Recovery Report - Batch 720-5016 Preparation 5030B <br /> MS Lab Sample ID 720-1604-1 Analysis Batch 720-5016 Instrument ID Varian 3900A <br /> Client Matrix Water Prep Batch NIA Lab File ID c Isatumwsldata120060111 <br /> Dilution 1 0 Initial Weight/Volume 10 mL <br /> Date Analyzed 01/29/2006 1525 Final Weight/Volume 10 mL <br /> Date Prepared 01/29/2006 1525 <br /> MSD Lab Sample 10720-1604-1 Analysis Batch 720-5016 Instrument ID Varian 3900A <br /> Client Matrix Water Prep Batch NIA Lab File Io c lsaturnwsldata120060110 <br /> Dilution 1 0 Initial Weight/Volume 10 mL <br /> Date Analyzed 01/29/2006 1547 Final Weight/Volume 10 mL <br /> Date Prepared 01/29/2006 1547 <br /> % Rec <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Benzene 94 96 69 - 129 1 20 <br /> MTBE 116 119 65 - 165 2 20 <br /> Toluene 119 120 70 - 130 1 20 <br /> Surrogate MS % Rec MSD % Rec Acceptance Limits <br /> Toluene-d8 94 91 77 - 121 <br /> 1,2-Dichloroethane-d4 95 96 73 - 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results <br /> STI_ San Francisco Page 20 of 24 <br />