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Quality Control Results <br /> Client: Shaw Environmental & Infrastructure, Inc Job Number: 720-21697-1 <br /> Method Blank- Batch: 720-55354 Method: 8260B <br /> Preparation: 5030B <br /> Lab Sample ID: MB 720-55354/1-A Analysis Batch: 720-55355 Instrument ID: Chenstation 3 <br /> Client Matrix: Solid Prep Batch: 720-55354 Lab File ID: 08060908.D <br /> Dilution: 1.0 Units: ug/Kg Initial Weight/Volume: 5 g <br /> Date Analyzed: 08/06/2009 1316 Final Weight/Volume: 10 mL <br /> Date Prepared: 08/06/2009 0718 <br /> Analyte Result Qua[ RL <br /> Isopropylbenzene ND 5.0 <br /> 4-Isopropyltoluene ND 5.0 <br /> Methylene Chloride ND 10 <br /> 4-Methyl-2-pentanone(MIBK) ND 50 <br /> Naphthalene ND 10 <br /> N-Propylbenzene ND 5.0 <br /> Styrene ND 5.0 <br /> 1,1,1,2-Tetrachloroethane ND 5.0 <br /> .1,1,2,2-Tetrachloroethane ND 5.0 <br /> Tetrach loroethene ND 5.0 <br /> Toluene ND 5.0 <br /> 1,2,3-Trichlorobenzene ND 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-trifluoroethane 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 ND 10 <br /> 2,2-Dichloropropane ND 5.0 <br /> Surrogate % Rec Acceptance Limits <br /> 4-Bromofluorobenzene 91 52-130 <br /> 1,2-Dich[oroethane-d4(Surr) 92 67- 130 <br /> Toluene-d8(Surr) 97 58- 130 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 50 of 63 08/17/2009 <br />