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r <br /> f <br /> Quality Control Results <br /> I <br /> Client: San Joaquin Company Inc Job Number: 720-1181-1 <br /> ! Laboratory Control/ Method: 8260B <br /> Laboratory Control Duplicate Recovery Report-Batch: 720-3885 Preparation:50308 <br /> LCS Lab Sample ID:LCS 720-388513 Analysis Batch: 720-3885 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch:NIA Lab File ID: cAsaturnwsldata120060110- <br /> '� Dilution: 1.0 Units: ug/L. Initial Weight/Volume: 10 mL <br /> { Date Analyzed: 01/04/2006 1030 Final Weight/Volume: 10 mL <br /> Date Prepared: 01/04/2006 1030 <br /> LCSD Lab Sample ID:LCSD 720-388512 Analysis Balch: 720-3885 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:Isatumwsldata1200601\01C <br /> Dilution: 1.0 Units:ug/L Initial Weight/Volume: 10. mL <br /> - Date Analyzed: 01/04/2006 1052 Final Weight/Volume: 10 mL <br /> Date Prepared: 01/04/2006 1052 <br /> i <br /> %Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 102 105 69-129 3 25 <br /> MTBE 94 97 65-165 3 25 <br /> 1 r Toluene 99 103 70- 130 4 25 <br /> Surrogate LCS%'Rec LCSD%Rec Acceptance Limits <br /> Toluene-d8 110 109 77-121 <br /> 1,2-Dichloroethane-d4 90 9b 73-130 <br /> .; <br /> i <br /> I <br /> E y� <br /> pl <br /> Ui <br /> I f} <br /> e <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 50 of 56 <br /> A <br />