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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Friday, April 22, 2005 <br /> Attention: Rich Ryan <br /> Neil 4.Anderson &Associate .Report Page lb of 17 <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> Total Petroleum Hydrocarbons-Gasoline- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit No(cs <br /> Batch AD52201-Solvent Extraction <br /> Blank(AD52201-BLKl) Prepared&Analyzed:22-Apr-05 <br /> TPH-Gasoline ND 200 ug/kg <br /> Surrogate:4-Bromofluorobenzene 53.4 50.0 107 75-125 <br /> mg/L=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 /> Jonathan Le,Laboratory Director <br /> 774.3 N West Lane . Suite R2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />