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Quality Control Results <br /> Client: H2OGeol Job Number: 720-9207-1 <br /> Method Blank - Batch: 720-21997 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-21997/3 Analysis Batch: 720-21997 Instrument ID: Saturn 2100 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: c:lsatumws\data1200705\0! <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 05/24/2007 1059 Final Weight/Volume: 10 mL <br /> Date Prepared: 05/24/2007 1059 <br /> Analyte Result Qua] RL <br /> 1,2-Dichloroethane ND 0.50 <br /> Benzene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> MTBE ND 0.50 <br /> TAME ND 0.50 <br /> Toluene NO 0.50 <br /> Xylenes,Total ND 1.0 <br /> TBA ND 5.0 <br /> DIPE ND 1.0 <br /> EDB ND 0.50 <br /> Gasoline Range Organics(GRO)-C5-C12 ND 50 <br /> Ethyl t-butyl ether ND 0.50 <br /> Surrogate %Rec Acceptance Limits <br /> Toluene-d8(Surr) 97 77- 121 <br /> 1,2-Dichloroethane-d4(Surr) 101 73-130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco page 15 of 20 <br />