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r <br /> Quality Control Results <br /> Itsrw <br /> Client: TRC Solutions Job Number: 720-521-1 <br /> Matrix Spike/ Method: 8260B <br /> Matrix Spike Duplicate Recovery Report - Batch: 720-2248 Preparation; 5030E <br /> MS Lab Sample ID: 720-521-1 Analysis Batch: 720-2248 Instrument ID: Saturn 2100 <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: d:ldata1200511\1122051m <br /> Dilution: 1.0 Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/22/2005 0933 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/22/2005 0933 <br /> MSD Lab Sample ID:720-521-1 Analysis Batch: 720-2248 Instrument ID:Saturn 2100 <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: d:Idata120051111122051md. <br /> Dilution: 1.0 Initial WeightfVolume:10 mL <br /> Date Analyzed: 11/22/2005 0959 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/2212005 0959 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Benzene 95 89 69 - 129 7 ' 20 <br /> MTBE 95 88 65'- 165 8 20 <br /> Toluene 104 100 70 - 130 4 20 <br /> Surrogate MS % Rec MSD % Rec Acceptance Limits �!J <br /> Toluene-d8 94 97 77 - 121 <br /> 1,2-Dichloroethane-d4 81 81 73 - 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 20 of 25 <br />