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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANAL YSIS <br /> Friday, October 29, 2004 <br /> Attentwn Guy Roy <br /> California Tank Lines Report Page 20 of 22 <br /> P O BOX 6245 <br /> Stockton, CA 95206 <br /> Total Petroleum Hydrocarbons-Gasoline-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lmt Units Level Result %REC Lntnts RPD Linut Notes <br /> Batch AJ42916-Volatiles <br /> Blank(AJ42916-BLKI) Prepared&Analyzed 30-Sep-04 <br /> TPH-Gasoline ND 100 ug/1 <br /> Surrogate 4-Bromofluorobenzene 480 500 96 75-125 <br /> LCS(AJ42916-BSI) Prepared 30-Sep-04 Analyzed 29-Oct-04 <br /> TPH-Gasoline 470 100 ug/1 500 94 75-125 <br /> Surrogate 4-Bromofluorobenzene 480 11 500 96 75-125 <br /> Matnx Spike(AJ42916-MSI) Source 4092310-03 Prepared 30-Sep-04 Analyzed 29-Oct-04 <br /> TPH-Gasoline 485 100 ugll 500 000 97 75-125 <br /> Surrogate 4-Bromojl'uorobenzene 450 fo 500 460 NR 75-125 <br /> Ak Spike Dup(AJ42916-MSD1) Source 4092310-03 Prepared&Analyzed 30-Sep-04 <br /> TP -Gasoline 490 100 ug/1 S00 000 98 75-125 1 20 <br /> Surrogate 4-Bromofluorobenzene 420 500 460 NR 75-125 <br /> i <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 /> MVFECTULLY SUBMITTED, <br /> 75/Ow� <br /> rJonathan Le,Laboratory Director <br /> 7743 N West Lane Suite B2 Stockton CA 95210 phone (209) 477-8105 Far (209) 477-8148 i <br />