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U <br /> Quality Control Results <br /> Client: H2OGeol Job Number: 720-9207-1 <br /> Lab Control Spike/ Method: 82608 <br /> Lab Control Spike Duplicate Recovery Report- Batch: 720-21997 Preparation: 50306 <br /> LCS Lab Sample ID:LCS 720-21997/2 Analysis Batch: 720-21997 Instrument ID: Saturn 2100 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200705\0( 4 <br /> Dilution: 1.0 - Units: ug/L Initial Weight/Volume: 10 mi- <br /> Date <br /> LDate Analyzed: 05/24/2007 0940 Final Weight/Volume: 10 ml- <br /> Date <br /> LDate Prepared: 05/24/2007 0940 <br /> LCSD Lab Sample ID:LCSD 720-21997/1 Analysis Batch: 720-21997 .Instrument ID: Saturn 2100 k <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:\saturnws\data\200705\05: { <br /> Dilution: 1.0 Units: ug/L Initial WeighWolume: 10 mL <br /> Date Analyzed: 05/24/2007 1007 Final WeighWolume: 10 mL k <br /> Date Prepared: 05/24/2007 1007 <br /> %Rec. <br /> Analyte LCS ! LCSD Limit RPD RPD Limit LCS Qual LCSD Dual <br /> Benzene 106. ', 102 69-129 4 25 <br /> MTBE - 111 108 65-165 2 25 <br /> Toluene 107 107 70-130 1 25 <br /> i <br /> Surrogate LCS% Rec LCSD% Rec Acceptance Limits <br /> Toluene-d8(Surr) 96` - 94 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 80 82 73- 130 <br /> V <br /> 1 <br /> V <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 16 of 20 <br /> 1 <br />