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Quality Control Results <br /> Client: Shaw Environmental & Infrastructure, Inc Job Number: 720-21697-1 <br /> Method Blank-Batch: 720-55224 Method: 8260B <br /> Preparation: 6030B <br /> Lab Sample ID: MB 720-55224/4 Analysis Batch: 720-55224 Instrument ID: Chenstation 3 <br /> Client Matrix: Water Prep Batch: N/A Lab File ID: 08050918.D <br /> Dilution: 1.0 Units: ug/L Initial Weight/Volume: 10 mL <br /> Date Analyzed: 08/05/2009 1727 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/05/2009 1727 <br /> Analyte Result Qual RL <br /> Isopropylbenzene ND _ 0.50 <br /> 4-Isopropyltoluene ND 1.0 <br /> Methylene Chloride ND 5.0 <br /> 4-Methyl-2-pentanone(MIBK) ND 50 <br /> Naphthalene ND 1.0 <br /> N-Propylbenzene ND 1.0 <br /> Styrene ND 0.50 <br /> 1,1,1,2-Tetrachloroethane ND 0.50 <br /> 1,1,2,2-Tetrachloroethane ND 0.50 <br /> Tetrach loroethene ND 0.50 <br /> Toluene ND 0.50 <br /> 1,2,3-Trichlorobenzene ND 1.0 <br /> 1,2,4-Trichlorobenzene ND, 1.0 <br /> 1,1,1-Trichloroethane ND 0.50 <br /> 1,1,2-Trichloroethane N D 0.50 <br /> Trichloroethene ND 0.50 <br /> Trichlorofluoromethane ND 1.0 <br /> 1,2,3-Trichloropropane ND 0.50 <br /> 1,1,2-Trich loro-1,2,2-trifluoroethane N D 0.50 <br /> 1,2,4-Trimethylbenzene ND 0.50 <br /> 1,3,5-Trimethylbenzene N D 0.50 <br /> Vinyl acetate ND 50 <br /> Vinyl chloride ND 0.50 <br /> Xylenes, Total ND 1.0 <br /> 2,2-Dichloropropane ND 0.50 <br /> Surrogate % Rec Acceptance Limits <br /> 4-Bromofluorobenzene 90 67- 130 <br /> 1,2-Dichloroethane-d4(Surr) 92 67- 130 <br /> Toluene-d8(Surr) 96 70- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 42 of 63 08/17/2009 <br />