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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 (510) 686 9600 FAX(510)686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9604 FAX (916)921 0100 <br /> Oaprealian Engineering, Inc Client Project ID Unocal#5098,5606 Paclfc Ave,Stockton Sampled Jul 13, 1994 <br /> 2401 Stanwell Dr , Ste 400 Sample Matrix Soil Received Jul 15, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Jul 29, 1994 <br /> Attention Avo Avedissian First Sample # 407-0707 <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 /> mg/kg 407-0707 407-0708 407-0709 407-0710 407-0711 407-0712 <br /> MW 15(5) MW 15(10) MW 15(15) MW 15(20) MW 15(25) MW 15(30) <br /> Purgeable <br /> Hydrocarbons 1 0 N D N D N D N D N D N D <br /> Benzene 00050 N D N D N D N D N D N D <br /> Toluene 00050 N D N D N D N D N D N D <br /> Ethyl Benzene 00050 N D N D N D N D N D N D <br /> Total Xylenes 00050 N D N D N D N D N D N D <br /> Chromatogram Pattern - -- <br /> Quality <br /> -Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 10 1 0 1 0 1 0 <br /> Date Analyzed 7/26/94 7/26/94 7/26/94 7/27/94 7/27/94 7/27/94 <br /> Instrument Identification HP-4 HP-4 HP-4 HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 93 88 91 98 99 99 <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 /> sg:L�-' <br /> Ian B Kemp <br /> Project Manager <br /> 16 4070695 KEI <3> <br />