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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 a Sacramento CA 95834 (916) 921 96W FAX(916)921 0100 <br /> OPOS Services Client Project Ib Unocal#5098 5606 Pacific Ave,Stockton Sampled Dec 19, 1995 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Dec 19, 1995 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /6020 Reported Jan 12, 1996 <br /> Attention Jarrel Crider First Sample # 512-2228 <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 /> 512-2228 MW-10 10 1/2/96 HP-2 93 <br /> 512-2229 MW-11 Gasoline 200 1/5/96 HP-2 89 <br /> 512-2230 MW-12 Gasoline 20 1/2/96 HP-2 70 <br /> 512-2231 MW-13 -- 10 1/2/96 HP-2 91 <br /> 512-2232 MW-14 -- 10 1/2/96 HP-2 88 <br /> 512-2233 MW-15 -- 10 1/2/96 HP-2 88 <br /> 512-2234 MW-16 Gasoline 10 1/8/96 HP-2 70 <br /> 512-2235 MW-17 -- 10 1/2/96 HP-2 82 <br /> 512-2236 ES1 -- 10 1/3/96 HP-2 92 <br /> 512-2237 ES2 -- 10 1/3/96 HP-2 88 <br /> 512-2238 ES3 -- 10 1/3/96 HP-2 87 <br /> SEQUOIA ANALYTICAL, #1271 <br /> lagnature on File <br /> Alan B Kemp <br /> Project Manager Page 2 of 2 <br /> 5122228 MPD <2> <br />