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1 � • <br /> PRECISION <br /> 1 ENWRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Wednesday,March 2,2005 <br /> Attention: Francis X. Bean <br /> Kleinfelder,Inc. <br /> Report Page 13 oJl! <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> ' Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Precision Eoviro-Tech <br /> ' Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AC50116-Volatiles <br /> Blank(AC50116-BLKI) Prepared&Analyzed:01-Mar-05 <br /> 1,2-Dibromoethane(EDB) ND 2.00 ug/kg <br /> Dibromomethane ND 2.00 " <br /> 1,2-Dichlorobenzene ND 2.00 <br /> 1,3-Dichlorobenzene ND 2.00 <br /> 1,4-Dichlorobenzene ND 2.00 " <br /> Dichlorodifluoromethane ND 2.00 " <br /> 1,1-Dichloroethanc ND 2.00 <br /> 1,2-Dichloroethane ND 2.00 <br /> 1,1-Dichloroethene ND 2.00 " <br /> cis-1,2-Dichloroethene ND 2.00 <br /> trans-1,2-Dichloroethene ND 2.00 <br /> 1,2-Dichloropropane ND 2.00 <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 /> ' lsopropylbenzene 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 /> ' 2,2-Tetrachloroethane ND 2.00 <br /> 1,2-Tetrachloroethane ND 2.00 <br /> Tetrachloroethee ND 2.00 " <br /> Toluene ND 2.00 " <br /> mg/L=milligrams per Liter=ppm DLR=Detection Lininfor Purpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> 1result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 774.1 N. i1`est Lane. Shite 132 Stockton CA. 95210 vilione: (209) 477-8105 Fax: (209) -177-8'148 <br />