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I <br /> '} Quality Control Results <br /> Client: TRC Solutions Job Number: 720-520-1 <br /> I` <br /> Laboratory Conitrol! <br /> Method: 82606 <br /> Laboratory Control Duplicate Recovery Report - Batch: 720-2293 Preparation: 50308 <br /> LCS Lab Sample IBLCS 720-2293110 Analysis Batch: 720-2293 Instrument ID: Saturn 3900B <br /> Client Matrix: ;;Water Prep Batch: NIA Lab File ID: c:lsatumwsldata120051111, <br /> Dilution: {;1.0 Units: ug/L Initial Weight/Volume: 10 mL i <br /> l I <br />! Date Analyzed: 1�11/21/2005 0647 Final Weight/Volume: 10 mL <br /> Date Prepared: 11112112005 0647 <br /> - -- - - -_---,-------------------------..., <br /> LCSD Lab Sample IMCSD 720-229319 Analysis Batch: 720-2293 Instrument ID: Saturn 39006 <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsatumwsldata`2005111i 1: <br /> Dilution: 1.0 Units:ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 11/21/2005 0713 Final Weight/Volume: 10 mL <br /> Date Prepared: 11/21/2005 0713 r <br /> {tri % Rec. <br /> Analyte j LCS LCSD Limit RPD RPD Limit LCS Qua] LCSD Qual <br /> Benzene 92 93 69 - 129 1 25 <br /> MTBE ' 92 100 65 - 165 8 25 <br /> ' Toluene t: 99 100 70 - 130 1 25 <br /> Surrogate LCS % Rec LCSD % Rec Acceptance Limits <br /> Toluene-d8 88 86 77 - 121 <br /> 1,2-Dichloroethane-d4 76 80 73 - 130 <br /> i <br /> . I <br /> B <br /> �1 <br /> I: <br /> k? <br /> P <br /> 1' <br /> Y' <br /> II y <br /> i <br /> I? <br /> 11 <br /> t <br /> ,I <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 15 of 19 <br />