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819 Striker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)92 E-0100 <br /> www sequotala65 com. <br /> Gettler-Ryan-Petaluma Project Former Tosco 6981,Stockton,CA 5212553 <br /> 1364 N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 01/08/03 17 07 <br /> Gasolme\BTEXIOxygenates by EPA method 8260B- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyse Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3010010-PPA 5030B(PITT <br /> Matrix Spike Dup(3010010-MSD1) Source 5212.733-01 Prepared 01/02/03 Analyzed 01/03/03 <br /> Benzene 140 050 ug/1 13 6 ND 103 70-130 13 25 <br /> Toluene 81 0 050 834 ND 97 70-130 8 25 <br /> Methyl Cert butyl ether 21 9 050 224 l 3 92 60-140 27 25 QR-02 <br /> Surrogate 1 2-DCA d4 305 250 112 60-140 <br /> Surrogate Toluene d8 251 250 100 60-140 <br /> Surrogate 4-BFB 256 25 0 102 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custodv documcnt Unless otherwise stated results are r epor ted on a u et weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 10 <br />