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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Analytical 1900 Bates Avenue Suite L Concord, CA 94520 (5 10) 686 9600 FAX(510) 686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 01POS Services Client Project ID Unocal#5098 5606 Pacific Ave,Stockton Sampled Jun 28, 1994 <br /> 2401 Stanwell Dr, Ste 400 Sample Matrix Water Received Jun 28, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Jul 13, 1994 <br /> Attention Avo Avedessian First Sample# 406-1378 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> pg/L 406-1378 406-1379 406-1380 406-1381 <br /> MW10 MW11 MW12 MW13 <br /> Purgeable <br /> Hydrocarbons 50 N D 86,000 25,000 N D <br /> Benzene 05 N D 15,000 760 N D <br /> Toluene 05 N D 20,000 820 N D <br /> Ethyl Benzene 05 40 1,700 340 N D <br /> Total Xylenes 05 080 11,000 2,200 N D <br /> Chromatogram Pattern Gasoline Gasoline - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 200 40 1 0 <br /> Date Analyzed 7/7/94 7/8/94 7/7/94 7/8/94 <br /> Instrument Identification HP-2 HP-4 HP-2 HP-2 <br /> Surrogate Recovery, % 97 90 112 96 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> e p <br /> rolect Ma r <br /> 4061378 MPD <1> <br />