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819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> 41) Sequoia (916)921-9600 <br /> r r Analytical ww,seq oialab OiDO <br /> wwwsegnoiala6s.com <br /> Gettler-Ryan-Dublin Project: Unocal 0187,Stockton,CA 5309436 <br /> 6747 Sierra Court,Ste.J Project Number; NIA Reported: <br /> Dublin CA,94568 Project Manager: Eric Jansen 09/30/03 17:40 <br /> GasolinelBTEMOxygenates by EPA method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U10 0187(S309436-07)Water Sampled:09/18/03 07:30 Received:09/18/03 13:50 <br /> Benzene ND 0.50 ug/l 1 3090318 09/24/03 09/24/03 EPA 8260E <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate:1,2-DCA-d4 85% 60-140 " <br /> Surrogate:Toluene-d8 85% 60-140 " <br /> Surrogate:4-BFB 86% 60-140 " <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 slated, results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 5 of 8 <br />