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680 Chesapeake Drive Redwood Cty,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9640 FAX(916)921 0100 <br /> e <br /> Cambria Environmental Client Project ID Shell, 341 past Main St ,lRipon, CA Sampled Jul 15, 1998 <br /> 1144 65th St , Suite C Sample Descript Sall, C1-S-45 Received Jul 17, 1998 <br /> Oakland, CA 94608 Analysis Method EPA 5030/8260 Extracted Jul 22, 1998 <br /> Attention Owen Ratchye Lab Number S807204 -09 Analyzed Jul 23, 1998 <br /> Reported Aug 3, 1998 , <br /> OXYGENATES by GC/MS (EPA 8260) <br /> Reporting Limit Sample Results ' <br /> Analyte pg/kg <br /> pg/kg <br /> Ethanal 25,000 N D 1 <br /> 000 N D <br /> Tertiary butanol 5, <br /> Methyl tertiary butyl ether(MTBE) 100 N D <br /> DI-isopropyl ether (DIPE) 100 N D ' <br /> Ethyl tertiary butyl ether (ETRE) 100 N D <br /> Tertiary amyl methyl ether (TAME) 100 N D <br /> Surrogate Control Limits, % Recovery, % <br /> 1,2-Dlchtoroe1hane-d4 70-121 83 <br /> _ I <br /> 1 <br /> I <br /> Analytes reported as N D were not detected at or above the reporting limit — — <br /> SEQUO A ANALYTICAL., ELAP#1210 <br /> l i da C Schne der <br /> Project Manager/Sacramento Laboratory <br /> S807204 CAM <9> <br />