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' PRECISIOA0 <br /> ENVIRO-TECH <br /> ' Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Tuesday,July 12, 2005 <br /> Attention: Doug Heard <br /> Kleinfelder, Inc. Report Page 97 of 103 <br /> 2825 Myrtle St. <br /> ' Stockton, CA 95205 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> tPrecision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> ' Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AG50802-Volatiles <br /> Blank(AG50802-BLK1) Prepared&Analyzed: 08-Jul-05 <br /> Acetone ND 100 ug/kg <br /> Acetone ND 100 <br /> tert-Butyl Acohol(TBA) ND 50.0 " <br /> Methyl tert-butyl Ether(MtBE) ND 5.00 <br /> Diisopropyl Ether(DIPE) ND 5.00 " <br /> Ethyl tert-Butyl Ether(ETBE) ND 5.00 " <br /> ' tert-Amyl Methyl Ether(TAME) ND 5.00 " <br /> Benzene ND 2.00 <br /> Benzene ND 5.00 <br /> Bromobenzene ND 2.00 " <br /> ' Ethylbenzene ND 5.00 <br /> Bromochloromethane ND 2.00 <br /> Toluene ND 5.00 <br /> m,p-Xylene ND 5.00 " <br /> Bromodichloromethane ND 2.00 1 <br /> o-Xylene ND 5.00 <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 /> mgE=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 /> �j/Ox�� <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />