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{ <br /> 4 �,�,yF <br /> i <br /> ``. Quality Control Results <br /> Client: San Joaquin Company Inc Job Number: 720-1181-1 <br /> Laboratory Control/ Method:8260B <br /> Laboratory Control Duplicate Recovery Report-Batch: 720-3739 Preparation: 50306 <br /> LCS Lab Sample ID:LCS 720-373919 Analysis Batch: 720-3739 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File 1D: c:lsaturnwsldata120051211: <br /> Dilution: 1.0 Units: uglL Initial Weight/Volume: 10 mL <br /> I Date Analyzed: 12/28/2005 0752 Final WeightlVolume: 10 mL <br /> Date Prepared: 12/28/2005 0752 <br /> i LCSD Lab Sample ID:LCSD 720-373918 Analysis Batch: 720-3739 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:Isatuwsldata1200512112,' <br />} <br /> Lj <br /> i rnDilution: 1.0 Units:uglL Initial Weight/Volume: 10 mL <br /> Dale Analyzed: 12/28/2005 0814 Final WeightlVolume: 10 mL <br /> -�--=---Date Prepared: 12/28/2005 0814 <br /> I <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Ll <br /> i Benzene 98 96 69- 129 3 �25 <br /> MTBE 91 92 65-165 1 25 <br /> Toluene 94 96 70-130 2 25 <br /> u <br /> Surrogate LCS%Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8 109 109 77-121 <br /> 1,2-Dichloroethane-d4 85 86 73- 130 <br /> °l <br /> i <br /> l <br /> i, Calculations areerformed before rounding avoid - <br /> p g to a n d round off errors in calculated results. <br /> STL San Francisco Page 46 of 56 <br /> i <br />