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.1 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> ID 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 %73 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EMCON Client Project ID ARCO 2168, Stockton, CA Sampled Nov 17, 1997 <br /> 1433 N Market Blvd Sample Matrix Water Received Nov 18, 1997 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020 Modified Reported Dec 4, 1997 <br /> Attention Deanna Santos First Sample # 711-0999 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Sample <br /> Analyte Units Results <br /> erg/L 711-0999 <br /> MW-7(48) <br /> MTBE N D <br /> Reporting Limit 50 <br /> Quality Control Data <br /> Date Analyzed 11/25/97 <br /> Instrument Identification GCHP-7 <br /> Surrogate Recovery, % 110 <br /> (OC Limits = 60-140%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> AdEQUOIA ANALYTICA , ELAP #1624 <br /> inda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 7110993 EMC <4. <br />