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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> OPOS Services Client Project ID Unocal#2859, 1665 Pacific Ave, Stockton Sampled Feb 14, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Feb 14, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Mar 4, 1997 <br /> Attention Jarrell Crider First Sample # 702-0891 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Chromatogram DL Mutt Date Instrument Surrogate <br /> Number Description Pattern Factor Analyzed ID Recovery, % <br /> QC Limits <br /> 70-130 <br /> 702-0891 MW-1 -- 10 2/20/97 HP-9 85 <br /> 702-0892 MW-2 Gasoline 400 2/20/97 HP-4 89 <br /> 702-0893 MW-3 -- 10 2/20/97 HP-4 93 <br /> 702-0894 MW-4 Gasoline 10 2/20/97 HP-4 95 <br /> 702-0895 MW-5 -- 10 2/20/97 HP-9 85 <br /> 702-0896 MW-6 -- 10 2/20/97 HP-9 86 <br /> 702-0897 MW-7 -- 10 2/20/97 HP-9 85 <br /> 702-0898 MW-8 -- 10 2/20/97 HP-9 93 <br /> 702-0899 MW-9 Discrete 10 2/20/97 HP-9 100 <br /> Peaks <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> * "Discrete Peaks' refers to unidentified peaks in the EPA 8010 range <br /> nature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 7020891 MPD <2> <br /> 6D <br />