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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 /> "IRIDS Services Client Project ID Unocal#6981,4707 Pacific Ave Stockton Sampled Oct 23, 1996 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Oct 23, 1996 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Nov 7, 1996 <br /> Attention Jarrel Crider First Sample # 610-1466 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes MTBE <br /> pg/L Ng/L Ng/L fig/L Mg/L Ing/L <br /> 610-1466 MW-6 ND ND ND ND ND ND <br /> 610-1467 MW-9 ND ND ND ND ND ND <br /> 610-1468 MW-11 ND ND ND ND ND ND <br /> Detection Limits 50 050 — 050 050 050 so <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as ND were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #2000 <br /> 4knature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 6101466 MPD <1:- <br />