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+ Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> �IIII� Analytical 1900 Bates Avenue,Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> PDS Services (_Tient 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 Avedessian First Sample # 404-1382 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D I D I D <br /> ug/L 404-1382 404-1383 404-1384 404-1385 404-1386 404-1387 <br /> MW 7 MW 8 MW 9 MW 10 MW 11 MW 12 <br /> Purgeable <br /> Hydrocarbons 50 8,300 94 N D N D N D N D <br /> Benzene 05 3,700 067 N D N D N D N D <br /> Toluene 05 N D 12 094 N D 10 0 89 <br /> Ethyl Benzene 05 400 0 52 N D N D N D N D <br /> Total Xylenes 05 130 2 4 1 3 1 1 1 3 12 <br /> Chromatogram Pattern Gasoline Gasoline _ <br /> Quality Control Data <br /> Report Limit Multiplication Factor 50 1 0 1 0 10 10 10 <br /> Date Analyzed 5/5/94 5/4/94 5/4/94 5/6/94 5/6/94 5/6/94 <br /> Instrument Identification HP-4 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 123 108 99 101 100 99 <br /> (QC 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 /> 1PKe <br /> Project Manager <br /> 4041376 MPD <2> <br />