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PRECISION <br /> E TVIRO-TECH <br /> Analytical Laboratoily CER TIFICA TE OF ANALYSIS <br /> Tues(hl.v,April 12,2005 <br /> Attention: Francis X. Bean <br /> Kleinfelder, Inc. Report Page 33 of 39 <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> Volatile Organic Compounds by EPA Method 8260B-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 /> Acetone ND 100 ug/kg <br /> Benzene ND 2.00 " <br /> Bromobenzene ND 2.00 " <br /> Bromochloromethane ND 2.00 " <br /> Bromodichloromethane ND 2.00 " <br /> Bromoform ND 2.00 " <br /> BrOmomethane ND 2.00 " <br /> 2-Butanone ND 20.0 " <br /> n-Butylbenzene ND 2.00 <br /> sec-Butylbenzene ND 2.00 <br /> tert-Butylbenzene ND 2.00 " <br /> Carbon disulfide ND 20.0 " <br /> Carbon tetrachloride ND 2.00 " <br /> Chlorobenzene ND 2.00 <br /> Chloroethane ND 2.00 <br /> 2-Chloroethylvinyl ether ND 20.0 <br /> Chloroform ND 2.00 " <br /> Chloromethane ND 2.00 " <br /> 2-Chlorotoluene ND 2.00 " <br /> 4-Chlorotoluene ND 2.00 <br /> Dibromochloromethane ND 2.00 <br /> 1,2-Dibromo-3-chloropropane ND 2.00 <br /> 1,2-Dibromoethane(EDB) ND 2.00 " <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-Dichloroethane 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 /> mg,L=milligrams per Liter=ppm DLR=Detection Limit.for Purpose of Reposing. <br /> etg;L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> '743 N. Kest Lane. .Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />