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4DSequoia 1455 McDowell Blvd North, Ste D <br /> Petaluma CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br /> ET1C Engineering Protect Exxon Sampled 5/5/99 <br /> P O Box 4429 Protect Number UP3942 1/7-3942 Received 517/99 <br /> Walnut Creek,CA 94596 Project Manager Chnsta Marting Reported 5/20/99 <br /> Sample Description MW8 <br /> Laboratory Sample Number: P905293-07 <br /> Batch Date Date Specific Method/ Reporting <br /> lAnalyte Number Prepared Analyzed Surrogate Limits Limit Result Units Notes" <br /> Sequoia Analytical-Petaluma <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M <br /> Gasoline 9050481 5/18/99 5/19/99 1000 19100 ug/1 <br /> Benzene 100 188 <br /> Toluene 100 78 9 <br /> Ethylbenzene 100 1580 " <br /> Xylenes(total) " 11 100 3000 " <br /> Methyl tert-butyl ether 400 461 <br /> Surrogate a a a-Trifluorotoluene 650-135 953 % <br /> Surrogate 4-Broniofluorobenzene 650-135 920 " <br /> Sequoia Analytical-Petaluma *Refer to end of report far text of notes and definitions <br /> Page 8 of 25 <br />