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L <br /> Quality Control Results <br /> L.lient: San Joaquin Company Inc <br /> Job Number: 720-2949-1 <br /> I ' <br /> Laboratory Control! <br /> Laboratory Control Duplicate Recovery Report -Batch: 720-7548 Method: 82608 <br /> f t. Preparation: 5030B <br /> LCS Lab Sample ID.LCS 720-754813 Analysis Batch: 720-7548 <br /> Client Matrix: Water Instrument ID: Varian 3900A <br /> Prep Batch: NIA <br /> Dilution: Lab Fie 0. c:lsatumwsldata12006041& <br /> 1.0 Units: ug/L <br /> Date Analyzed_ 04/1'!/2006 1019 Initial Weight/Volume: 10 mL <br /> Date Prepared: 04/11/2006 1019 Final WeighWolume: 10 mL <br /> ....... .......... .... ......... <br /> LCSD Lab Sample ID:LCSD 720-754812 Analysis Batch: 720-7548 <br /> Instrument ID. Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:Isaturnwsldata12006041041 <br /> Dilution_ 1.0 Units:a /L <br /> g initial Weight/Volume: 10 mL <br /> Date Analyzed: 04/11/2006 1052 Final Weight/Volume: 10 mL <br /> Date Prepared: 04/11/2006 1052 <br /> t <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qua! LCSD Qua[ <br /> Benzene 102 103 69- 129 0 25 <br /> MTBE 107 100 65- 165 7 25 <br /> 3-^,-Toluene 101 103 70- 130 2 25 <br /> 0 <br /> Surrogate _ LCS /o Rec LCSD% Rec Acceptance Limits <br /> Toluene-d8 97 98 M 77- 1211,2-Dichloroethane-d4 96 91 73- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated resu[ts- <br /> LSTL San Francisco Page 47 of 54 <br />