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PRECISION <br /> EATWRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Tuesday,April 12,2005 <br /> Attention: Francis X. Bean <br /> Kleinfelder,Inc. Report Page 37 of 39 <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <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 Notes <br /> Batch AD51110-Volatiles <br /> Blank(AD51110-BLKI) Prepared:11-Apr-05 Analyzed:12-Apr-05 <br /> TPH-Gasoline ND 200 ug/kg <br /> Surrogate:4-Bromofluorobenzene 53.0 50.0 106 75-115 <br /> mg L=milligrams per Liter=ppm DLR=Defection Limit for Purpose olReporfing. <br /> ug L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> msuh in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> 743 N. West Lane. Suite B2 Stockton CA. 95210 nhone: (209) 477-8105 Fax: (209) 477-8148 <br />