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i <br /> Quality Control Results <br /> Client: TRC Solutions Job Number: 720-520-1 <br /> + I: <br /> Laboratory Control/ Method: 8260B <br /> Laboratory Control Duplicate Recovery Report - Batch: 720-2672 Preparation: 5030B <br /> LCS Lab Sample ICL•CS 720-267214 Analysis Batch: 720-2672 Instrument ID: Varian 3900A <br /> 1 Client Matrix: j,,Water Prep Batch: NIA Lab File ID: c:lsatumws1data120051211: <br /> Dilution: f11,0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 1,12/06/2005 1836 Final Weight/Volume: 10 mL <br /> Date Prepared: 11210612005 1836 <br /> 4. <br /> L_CSD_La'b Sample ,ID-CSD 720-267213 Analysis Batch: 720-2672 Instrument ID: Varian 3900A <br /> Client Matrix: ,Water Prep Batch: NIA Lab File ID: cAsatumwsldata1200512112{ <br /> Dilution: x;1.0 Units:ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: '312106/2005 1919 Final Weight(Volume: 10 mL <br /> Date Prepared: i,'12/06/2005 1919 <br /> is <br /> 14 % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qua] LCSD,Qud <br /> Benzene 78 82 69 - 129 5 25 <br /> MTBE ? 88 84 65 - 165 5 25 <br /> Toluene 83 88 70 - 130 5 25 <br /> h I <br /> Surrogate 1' LCS % Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8 F 104 105 77 - 121 <br /> 1,2-Dichloroethane-d4 87 80 73 - 130 <br /> }})H <br /> II <br /> f <br /> i. <br /> L <br /> L11 <br /> 4 11 <br /> i <br /> c1 <br /> i <br /> I3 <br /> E l+ <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. i <br /> 5TL San Francisca Page 17 of 19 <br /> I I <br />