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^ 819 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 9M34 <br /> `1 (916)92 1-9600-96M <br /> FAX(916)921-0100 <br /> a— ) <br /> ► Analytical www sequoialabseom <br /> IW SRyan-Dublin Project TOSCO 11192,Stockton,CA S305429 <br /> ierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 05/29/03 17 15 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Lumt Notal <br /> Batch 3050475-EPA 5030B JP/TJ <br /> Laboratory Control Sample(3050475-BS2) Prepared&Analyzed 05/28/03 <br /> Benzene 298 050 ug/l 272 110 70-130 <br /> Toluene 183 050 167 110 70-130 <br /> Methyl ter(-butyl ether 4 02 20 448 90 60-140 <br /> Gasoline(C6-C10) 263 50 220 120 70-130 <br /> Surrogate 7oluened8 253 250 101 60-140 <br /> Surrogate 4-BFB 271 250 109 60-140 <br /> �oia 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 mast be reproduced in its entirety <br /> Page 16 of 23 <br />