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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,April 19,2005 <br /> Attention: Doug Heard <br /> Kleinfelder,Inc. Report Page 13 of 17 <br /> 2825 Myrtle St. <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 AD51806-Volatiles <br /> Blank(AD51806-BLKI) Prepared: 18-Apr-05 Analyzed: 19-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 /> lsopropylbenzene ND 2.00 " <br /> p-lsopropyltoluene 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 Limitfor 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 /> Jonathan Le,Laboratory Director <br /> 7'43N. YVest Latae . Suite B2 Stockto» C4. 95 210 ohoue: (209) 477-810j Fax. (209) 477-8148 <br />