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1 <br /> L} Quality Control Results <br /> 1— <br /> Client: San Joaquin Company Inc Job Number: 720-2949-1 <br /> ELaboratory Control/ <br /> Method: 8260B <br /> Laboratory Control Duplicate Recovery Report-Batch: 720-7554 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-7554/15 Analysis Batch: 720-7554 Instrument ID: Varian 3900A <br /> Client Matrix. Water Prep Batch: NIA Lab File ID- c:Isaturnwsldata12006041& <br /> Dilution: 1.0 Units: ug/L Initial WeighWolume: 10 mL <br /> Date Analyzed: 04/10/2006 1922 Final WeighWolume: 10 mL <br /> Date Prepared: 04/10/2006 1922 <br /> LCSD Lab Sample ID:LCSD 720-7554114 Analysis Batch: 720-7554 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsatumwsldata12006041041 <br /> Dilution: 1.0 Units:ug/L Initial WeighWolume: 10 mL <br /> Date Analyzed: 04/10/2006 1944 Final WeighWolume: 10 mL <br /> Date Prepared: 04/10/2006 1944 <br /> f % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene <br /> 104 103 69-129 9 129 0 25 <br /> MTBE 102 105 65- 165 3 25 <br /> `r""4 Toluene 101 102 70- 130 1 25 <br /> Surrogate _ LCS% Rec______ LCSD% Rec Acceptance Limits <br /> Toluene-d8 103 101 77- 121 <br /> I 1,2-Dichloroethane-d4 115 120 73- 130 <br /> L <br /> L <br /> L <br /> Li <br /> k . <br /> Calculations are performed before rounding to avoid round-oft errors in calculated results. <br /> STL San Francisco Page 49 of 54 <br />