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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> . - (916)921-9600 <br /> -0100 <br /> Analytical FAX{9uoialaJ 6)92 s.com <br /> www.sequoialabs.com <br /> GettleT-Ryan-Petaluma Project: Tosco 11195,Lathrop,CA S306466 <br /> 1364 N McDowell Blvd,Ste B2 Project Number: NIA Reported: <br /> Petaluma CA,94954 Project Manager: Dave Vossler 07/08/03 09:37 <br /> GasoliinelBTEXIOxygenates by EPA method 8260B- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3070038-EPA 5030E [PIT] <br /> Matrix Spike Dup(3070038-MSD1) Source:5306532-02 Prepared&Analyzed:07/02/03 <br /> Benzene 11.2 0.50 ugll 13.6 ND 82 70-130 7 25 <br /> Toluene 69.2 0,50 83.4 ND 93 70-130 9 25 <br /> Methyl tort-butyl ether 23.6 0.50 22.4 ND 105 60-140 11 25 <br /> Gasoline(C6-C10) 777 50 1100 ND 71 60-140 14 25 <br /> Surrogate:1,2-DCA-d4 17.4 25.0 110 60-140 <br /> Surrogate:Toluene-d8 23.8 25.0 95 60-140 <br /> Surrogate:4-BFB 15.1 25,0 101 60-140 <br /> i <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. , <br /> This analytical report must be reproduced in its entirery. <br /> ,1 <br /> Page 5 of 6 <br />