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.l <br /> .l <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 444 N Wiget Lane Walnut Geek CA 94598 (510) 988 9600 FAX {510}988 9673 <br /> Analytical 819 Striker Avenue,Shite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> EMCON Client Project 1D ARCO 548, Stockton, CA Sampled Feb 10, 1998 <br /> 1433 N Market Blvd Sample Matrix Soil Received Feb 11, 1998 <br /> Sacramento, CA 95,834 Analysis Method EPA 5030/8020 Modified Reported Feb 12, 1998 <br /> Attention Mark Capps First Sample # 802-0225 <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 802-0225 802-0226 802-0227 802-0228 802-0229 802-0230 <br /> PL-1 (3) PL-2 (3) PL 3 (3) PL 4 f3) PL 5 (3) PL 6 (3) <br /> MTBE ND ND 026 ND ND ND <br /> Reporting Limit 0 050 0 050 0 050 0 050 0 050 0 050 <br /> Quality Control Data <br /> Date Analyzed 02/11/98 02/11/98 02/11/98 02/11/98 02/11/98 02/12/98 <br /> Instrument Identification GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-2 GCHP-1 <br /> Surrogate Recovery, % 87 94 98 97 97 93 <br /> (QC 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 /> UOIA ANALYTICAL, FLAP #1624 <br /> Ronald W Bobel <br /> Project Manager/Sacramento Laboratory <br /> 8020225 EMC <3> <br />