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/ \ Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> �III� Analytical 1900 Bates Avenue Suite L Concord,CA 94524 (510) 686 9600 FAX (510) 686 9689 <br /> 919 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> realian Engineering, Inc Client Project ID Unocal#5098,5606 Pacific Ave,Stockton Sampled Jul 13, 1994Ripl Stanwell Dr , Ste 400 Sample Matrix Sal] Received Jul 15, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Jul 29, 1994 <br /> Attention Avo Avedissian First Sample # 407-0701 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID ID ID ID <br /> mg/kg 407-0701 407-0702 407-0703 407-0704 407-0705 407-0706 <br /> MW 14(35) MW 14(40) MW 14(45) MW 14(51) MW 14(55) MW 14(60) <br /> Purgeable <br /> Hydrocarbons 10 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 Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 1 0 10 1 0 <br /> Date Analyzed 7/26/94 7/26/94 7/26/94 7/26/94 7/26/94 7/26/94 <br /> Instrument Identification HP-2 HP-2 HP-2 HP-2 HP-4 HP-4 <br /> Surrogate Recovery, % 98 100 100 94 88 89 <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 nALYTICAL, #1271 <br /> 71- Ian B Kemp <br /> Project Manager <br /> ` 4070695 KEI <2> <br />