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♦1 <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(510)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> �i1� Analytical110 <br /> CON <br /> Ghent Project ID ARCO 548, Stockton, GA Sampled Feb 10, 1998 <br /> 1433 N Market Blvd Sample Matrix Soil Received Feb 11, 1998 <br /> Sacramento, CA 95834 Analysis Method EPA 5030/8020 Modified Reported Mar 2, 1998 <br /> Attention Mark Capps First Sample # 802-0234 <br /> METHYL TERTIARY BUTYL ETHER (MTBE) <br /> Sample Sample Sample Sample Sample Sample <br /> Analyte Units Results Results Results Results Results Results <br /> mg/kg 802-0234 802-0235 802-0236 802-0237 802-0238 802-0239 <br /> T-4-S(15 5) T-4-N(16) T-3-S(15 5) T 3 N(15 5) T-2-N(15) T-2-S(15 5) <br /> MTBE 0 057 N D N D N D N D Oil <br /> Reporting Limit 0 050 0050 0 050 12* 12* D 050 <br /> i <br /> Quality Control Data <br /> Date Analyzed 02/11/98 02/11/9B 02/11/98 02/11/98 02/11/98 02/11/98 <br /> instrument Identification GCHP-1 GCHP-1 GCHP-2 GCHP-1 GCHP-i GCHP-2 <br /> Surrogate Recovery, % 88 95 94 98 96 95 <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 /> *Elevated reporting limits due to matrix interference <br /> SEQUOIA ANALYTICAL, ELAP #16 <br /> %� <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020234 EMC <3> <br />