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PRECISION, <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Friday,April 4, 2008 <br /> Attention: Guy W.Roy <br /> R&L Diesel <br /> P.O.BOX 2498 Report Page 37 of 4r <br /> Danville, CA 94526 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Precision Enviro-Tech <br /> �I <br /> Reporting Spike Source °/"REC RPD <br /> Analyte Result Limit Units i.evel Result %REC Limits RPD Limit Notes <br /> Batch AC81102-Volatiles <br /> Blanc(AC81102-BLK1) Prepared&Analyzed: 11-Mar-08 <br /> 1,2-Dichloropropane ND 2.00 ug/kg <br /> 1,3-Dichloropropane ND 2.00 " <br /> 2,2-Dichloropropane ND 2.00 " <br /> I,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 /> 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 /> Methyl tert-butyl Ether(MtBE) ND 2.00 " <br />{ mg/L-milligrams per Liter-ppm DLR-Detection Limit jou Purpose ofReporting. <br /> ue/L=micrograms per Liter-ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> l <br /> Jonathan Le,Laboratory Director <br /> 3935 N, Coronado Ave Stockton CA. 95204 l7hone: (209) 477-8105 Fax: (209) 146-7497 <br />