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., <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5l0)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> *CON Client Project ID ARCO 548, Stockton CA Sampled Feb 10 1998 <br /> 1433 N Market Blvd Sample Descript Sod, T-3-N(15 5) Received Feb 11, 1998 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8280 Analyzed Feb 20, 1998 <br /> Attention Mark Capps Lab Number 802-0237 Reported Mar 2, 1998 <br /> OXYGENATES by GC/MS (EPA 8260) <br /> Analyte Reporting Limit Sample Results <br /> Ng/kg Ng/kg <br /> Tertiary butanol , 200,000 N D <br /> Methyl tertiary butyl ether (MTBE) 4,000 N D <br /> DI-Isopropyl ether (DIPE) 4,000 N D <br /> Ethyl tertiary butyl ether (ETRE) 4,000 N D <br /> Tertiary amyl methyl ether (TAME) 4,000 N D <br /> Analytes reported as N 0 were not detected at or above the reporting limit Because matrix effects and/or other factors <br /> required additional sample dilution, reporting limits for this sample have been raised <br /> SEQUOIA ANALYTICAL, ELAPO#121 <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020234 EMC <9> <br />