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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wrget 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 /> �„ r <br /> WPDS Services Client Project Ib Unocal#6981,4707 Pacific Ave Stockton Sampled Apr 25, 1996 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Apr 25, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported May 9, 1996 <br /> Attention Jarrel Crider First Sample# 604-1975 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Chromatogram DL Mult Date Instrument Surrogate <br /> Number Description Pattern Factor Analyzed ID Recovery, % <br /> QC Limits <br /> 70-130 <br /> 604-1975 MW-6 -- 10 5/6/96 HP-2 80 <br /> 604-1976 MW-9 -- 10 5/6/96 HP-2 75 <br /> 604-1977 MW-10 -- 10 5/6/96 HP-2 80 <br /> 604-1978 MW-11 -- 10 5/6/96 HP-2 80 <br />• 604-1979 MW-12 -- 10 5/6/96 HP-2 77 <br /> 604-1980 MW-13 -- 10 5/6/96 HP-2 82 <br /> 604-1981 ES-1 -- 10 5/6/96 HP-2 102 <br /> 604-1982 ES-2 -- 10 5/6/96 HP-2 105 <br /> 604-1983 ES-3 -- 10 5/6/96 HP-2 105 <br /> SEQUOIA ANALYTICAL, #1271 <br /> & #1894 <br /> lignature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 6041975 MPD <2> <br />