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1 <br /> Sequoia 680 ChesapeaKe Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Ana7 <br /> lytic <br /> aa 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510) 686 9689 <br /> 1 319 Striker Avenue Suite 8 Sacramento CA 95834 X916) 921 9600 FAX(916)921 0100 <br /> Brown & Caldwell Client Project 1D Arco 2133-94-5, Stockton Sampled Dec 9, 1990 <br /> 9616 Micron Ave , Suite 600 Sample Matrix Water Received Dec 9 1994 <br /> Sacramento CA 95827 Analysis Method EPA 5030/8015/8020 Reported Dec 19 1994 <br /> Attention Mindy Wright First Sample # 412-0299 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample <br /> Analyte Limit I D. <br /> jig/L 412-0299 <br /> Tank — <br /> Flurgeabie <br /> Hydrocarbons 50 N D <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Total Xylenes 050 N D <br /> Chromatogram Pattern -- <br /> - Quality Control Data - <br /> Report Limit Multiplication Factor 10 <br /> Date Analyzed 12/14/94 <br /> Instrument Identification GCHP-1 <br /> Surrogate Recovery, % 77 <br /> (QC Limits = 70-130%) <br /> Purgeabie Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, ELAP #1624 <br /> 4 <br /> Je le Higgins <br /> Project Manager <br /> 4120299 BRS <1> <br />