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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,April 12,2005 <br /> Attention: Francis X. Bean <br /> Kleinfelder,Inc. Report Page 34of39 <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> Volatile Organic Compounds by EPA Method 82608-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AD51110-Volatiles <br /> Blank(AD51110-BLK1) Prepared&Analyzed:11-Apr-05 <br /> 1,2-Dichloropropane ND 2.00 ug/kg <br /> 1,3-Dichloropropane ND 2.00 " <br /> 2,2-Dichloropropane ND 2.00 " <br /> 1,1-Dichloropropene ND 2.00 " <br /> cis-1,3-Dichloropropene ND 2.00 " <br /> trans-1,3-Dichloropropene ND 2.00 " <br /> Ethylbenzene ND 2.00 " <br /> Freon 113 ND 2.00 " <br /> Hexachlorobutadiene ND 2.00 " <br /> 2-Hexanone ND 50.0 " <br /> Isopropylbenzene ND 2.00 " <br /> p-Isopropyltoluene ND 2.00 " <br /> Methylene chloride ND 2.00 " <br /> 4-Methyl-2-pentanone ND 20.0 " <br /> Methyl tert-butyl ether ND 2.00 " <br /> Naphthalene ND 2.00 " <br /> n-Propylbenzene ND 2.00 " <br /> Styrene ND 2.00 " <br /> 1,1,2,2-Tetrachloroethane ND 2.00 " <br /> 1,1,1,2-Tetrachloroethane ND 2.00 " <br /> Tetrachloroethene ND 2.00 <br /> Toluene ND 2.00 <br /> 1,2,3-Trichlorobenzene ND 2.00 " <br /> 1,2,4-Trichlorobenzene ND 2.00 " <br /> 1,1,2-Trichloroethane ND 2.00 <br /> 1,1,1-Trichloroethane ND 2.00 " <br /> Trichloroethene ND 2.00 " <br /> Trichlorofluoromethane ND 2.00 " <br /> 1,2,3-Trichloropropane ND 2.00 " <br /> 1,3,5-Trimethylbenzene ND 2.00 " <br /> 1,2,4-Trimethylbenzene ND 2.00 <br /> Vinyl acetate ND 20.0 " <br /> Vinyl chloride ND 2.00 " <br /> mg L=milligrams per Liter=ppm DLR=Detection Limit for purpose of Reporting. <br /> ug L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> r'7/Ot� <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane. Suite.B2 Stockton CA. 95210 nhow: (209) 47-8105 Fczx: (209) 477-8148 <br />