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Sequoia <br /> 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX (510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> PDS Services Client Project ID Unocal#6981,4707 Pacific Ave,Stockton Sampled Apr 25-26, 1994 <br /> 2401 Stanwell Dr, Ste 400 Sample Matrix Water Received Apr 27, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported May 11, 1994 <br /> Attention Avo Avedesslan First Sample# 404-1388 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> pg/L 404-1388 Matrix <br /> MW 13 Blank <br /> Purgeable <br /> Hydrocarbons 50 N D <br /> Benzene 05 N D <br /> Toluene 05 081 <br /> Ethyl Benzene 05 N D <br /> Total Xylenes 05 1 4 <br /> Chromatogram Pattern <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 <br /> Date Analyzed 5/6/94 5/6/94 <br /> Instrument Identification HP-2 HP-2 <br /> Surrogate Recovery, % 100 106 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against afresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> Ke <br /> Project Mger <br /> a <br /> 4041376 MPD X37 <br />