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Quality Control Results <br /> "'Client: San Joaquin Company Inc Job Number. 720-4610-1 <br /> Laboratory Control/ Method: 82608 <br /> i Laboratory Control Duplicate Recovery Report- Batch. 720-11218 Preparation: 5030B <br /> LCS Lab Sample ID:LCS 720-11218116 Analysis Batch: 720-11218 Instrument ID: Varian 3900A <br /> II Client Matrix: Water Prep Batch: NIA Lab File ID: c:Isatumwsldata120060710; <br /> Dilution: 1.0 Units. ug/L Initial WeightlVolume.- 10 mL <br /> Date Analyzed: 07/20/2006 0931 Final Weight/Volume: 10 mL <br /> Date Prepared: 07/20/2006 0931 <br /> -----------------_---------_......._ _.._.___.___..__..._.._. _.__ ......._ ------ <br /> i LCSD Lab Sample ID:LCSD 720-11218115 Analysis Batch: 720-11218 Instrument ID: Varian 3900A <br /> Client Matrix: Water Prep Batch: NIA Lab File ID: c:lsatumwsldata1200607107: <br /> Dilution: 1.0 Units:ug/L Initial WeightlVolume: 10 mL <br /> Date Analyzed: 07/20/2006 0953 Final WeightlVolume: 10 mL <br /> Date Prepared: 07/20/2006 0953 <br /> Ell <br /> % Rec. <br /> Analyte LCS LCSD Limit RPD RPD Limit LCS Qual LCSD Qual <br /> Benzene 90 89 69-129 1 25 <br /> MTBE 94 90 65- 165 4 25 <br /> Toluene 92 90 70-130 2 25 <br /> f <br /> Surrogate LCS % Rec LCSD% Rec Acceptance Limits <br /> Toluene-d8 92 90 77-121 <br /> 1,2-Dichloroethane-d4 89 85 73-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 10 of 13 <br />