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Quality Control Results <br /> Client: H2OGeol Job Number: 720-8838-1 <br /> Method Blank - Batch: 720.20897 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-20897/2 Analysis Batch: 720-20897 Instrument ID: Varian 3900G <br /> Client Matrix: Solid Prep Batch: N/A Lab File ID: c:\saturnws\data\200704\0, <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 04/26/2007 1049 Final Weight/Volume: 10 mL <br /> Date Prepared: 04/26/2007 1049 <br /> Analyte Result Qual RL <br /> Isopropylbenzene ND 5.0 <br /> 4-Isopropyltoluene NO 5.0 <br /> Methylene Chloride NO 10 <br /> methyl isobutyl ketone NO 50 <br /> Naphthalene NO 10 <br /> N-Propylbenzene NO 5.0 <br /> Styrene NO 5.0 <br /> 1,1,1,2-Tetrachloroethane NO 5.0 <br /> 1,1,2,2-Tetrachloroethane NO 5.0 <br /> Tetrachloroethene ND 5.0 <br /> Toluene ND 5.0 <br /> 1,2,3-Trichlorobenzene NO 5.0 <br /> 1,2,4-Trichlorobenzene ND 5.0 <br /> 1,1,1-Trichloroethane ND 5.0 <br /> 1,1,2-Trichloroethane ND 5.0 <br /> Trichloroethene ND 5.0 <br /> Trichlorofluoromethane ND 5.0 <br /> 1,2,3-Trichloropropane ND 5.0 <br /> 1,1,2-Trichloro-1,2,2-trifl uoroethane ND 5.0 <br /> 1,2,4-Trimethylbenzene ND 5.0 <br /> 1,3,5-Trimethylbenzene ND 5.0 <br /> Vinyl acetate ND 50 <br /> Vinyl chloride ND 5.0 <br /> Xylenes,Total NO 10 <br /> 2,2-Dichloropropane ND 5.0 <br /> Surrogate % Rec Acceptance Limits <br /> 4-Bromofluorobenzene 80 60 - 140 <br /> 1,2-Dichloroethane-d4(Surr) 95 60 - 140 <br /> Toluene-d8(Sun) 89 70- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> STL San Francisco Page 51 of 84 <br />