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Quality Control Results <br /> Client San Joaquin Company Inc Job Number: 720-4608-1 <br /> f Laboratory Control/ Method: 8260B <br /> Laboratory Control Duplicate Recovery Report-Batch: 720-11172 Preparation: 5030B <br /> y <br /> LCS Lab Sample ID:LCS 720-11172122 Analysis Batch: 720-11172 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsaturnwsldata120060710'. <br /> E Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/19/2006 1814 final Weight/Volume: 10 mL <br /> Date Prepared: 07/19/2006 1814 <br /> ��� LCSD Lab Sample ID:LCSD 720-11172121 Analysis Batch: 720-11172 Instrument ID: Varian 3900A <br /> LLClient Matrix: Water Prep Batch: NIA Lab File ID: c:Isaturnwsldata12006071071 <br /> ' Dilution: 1.0 Units:ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/19/2006 1837 final Weight/Volume: 10 mL <br /> 'Date Prepared: 07/19/2006 1837 <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 97 98 69- 129 1 25 <br /> w _ MTBE 92 95 65- 165 3 25 <br /> Toluene 98 103 70-130 5 25 <br /> Surrogate LCS %Rec LCSD% Rec. Acceptance Limits <br /> Toluene-d8 92 92 77- 121 <br /> 1,2-Dichloroethane-d4 81 85 73-130 <br /> j� <br /> l <br /> I <br /> f I <br /> 3 <br /> k <br /> 1 <br /> f Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> ll STL San Francisco Page 40 of 54 <br />