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819 Striker Ave Ste 8 <br /> Sequoia Sacram(915834 <br /> 6)92199600 <br /> FAX(916)92Analytical ww.sequoiala s.c oa <br /> wwwsequoialabs.com <br /> Gettler-Ryan-Petaluma Project: Tosco 11195,Lathrop,CA 5212401 !1 i <br /> 1364 N McDowell Blvd. Ste B2 Project Number; NIA Reported: <br /> Petaluma CA,94954 Project Manager: Jed Douglas 12/31/02 12:52 <br /> GasolineWEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Resell Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-21-5(10)(5212401-04)Sail Sampled.•12/10/0200:00 Received: 12112/0210:00 <br /> Benzene ND 0.0050 mg/kg 1 2120307 12/19/02 12/19/02 EPA 92608 <br /> Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 <br /> Xylenes(total) ND 0.010 <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Gasoline(C6-C10) Nib 1.0 <br /> Surrogate:1,2-DC.4-d4 79% 60-140 " <br /> Surrogate:Toluene-d8 113% 60-140 <br /> Surrogate:4-BFB 92910 60-140 " <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody docunnent. Unless otherwise slated,results are reported on a wet tiveight basis. <br /> This analytical report must be reproduced in its entirely. <br /> Page 4 of 7 <br />