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�f <br /> Quality Control Results <br /> 'Client: San Joaquin Company Inc Job Number: 720-4608-1 <br /> Laboratory Control/ Method: 8260B <br /> Laboratory Control Duplicate Recovery Report- Batch: 720-11302 Preparation: 50308 <br /> LCS.Lab Sample ID:LCS 720-11302/11 Analysis Batch: 720-11302 Instrument ID, Varian 3900C <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsatumwsldata120060710; <br /> Dilution: 1.0 Units: ug1L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/21/2006 0919 final Weight/Volume: 10 mL <br /> Date Prepared: 07/21/2006 0919 <br /> _.... ........-..... <br /> _.... <br /> LCSD Lab Sample 1D:LCSD 720-11302/10 Analysis Batch: 720-11302 Instrument ID: Varian 3900C <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:Isaturnwsldata1200607107,' <br /> Dilution: 1.0 Units:ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 07/21/2006 0946 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/21/2006 0946 <br /> I <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Quai <br /> Benzene 98 96 69- 129 2 25 <br /> MTBE 109 98 65-165 11 25 <br /> L <br /> Toluene 108 106 70-130 2 25 <br /> Surrogate LCS% Rec LCSD% Rec Acceptance Limits <br /> Toluene-d8 103 103 77-121 <br /> 1,2-Dichloroethane-d4 96 94 73-130 <br /> i <br /> f f� <br /> I <br /> �i <br /> r <br /> i 1 <br /> ' Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> �k <br /> STL San Francisco Page 47 of 54 <br />