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Quality Control Results <br /> .,.. Job Numbe <br /> Trent: San Joaquin Company Inc .r. 720-4608-1 <br /> Laboratory Control! <br /> Method: 8260B <br /> Laboratory Control.Duplicate Recovery Report-Batch: 720-11338 Preparation: 50308 <br /> t. <br /> LCS Lab Sample ID:LCS 720-1133813 Analysis Batch: 720-11338 Instrument ID: Varian 3900C <br /> Client Matrix: Water Prep Batch: NIA Lab File 0: c:Isaturnwsld8ta120060710; <br /> Dilution: 1.0 Units: ug/L Initial WeightNolume: 40 mL <br /> Date Analyzed: 07/25/2006 1053 Final WeightlVolume: 40 mL <br /> Date Prepared: 07/25/2006 1053 <br /> LCSD Lab Sample ID:LCSD 720-1133812 Analysis Batch: 720-11338 instrument ID: Varian 3900C <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:Isaturnwsldata1200607107: <br /> 1 Dilution: 1.0 Units:ug/L initial Weight/Volume: 40 mL <br /> LLL Date Analyzed: 07/25/2006 1119 Final Weight/Volume: 40 mL <br /> Date Prepared: 07/25/2006 1119 <br /> t - <br /> 2 <br /> % Rec. <br /> r Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 94 98 69-129 4 25 <br /> MTBE 103 106 65-165 3 25 <br /> '__"Toluene 97 96 70- 130 1 25 <br /> Surrogate LCS%Rec'. LCSD%Rec Acceptance Limits <br /> Toluene-d8 105 99 77-121 <br /> 1,2-Dichloroethane-d4 99 101 73-130 <br /> LLL. <br /> + Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> f <br /> STL San Francisco Page 50 of 54 <br />