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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 %73 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> �MPOS Services Client Project ID Unocal#0123 1034 Central Ave Trary Sampled Dec 2, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descnpt Water Received Dec 2, 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 23, 1997 <br /> Attention Jarrel Crider First Sample # 712-0369 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> pg/L Ing/1- Ing/L us/L Ing/L <br /> 712-0369 U 1 120 11 29 89 11 <br /> 712-0370 U 2 130 057 12 28 27 <br /> 712-0371 U 3 ND ND ND ND ND <br /> 712-0372 U 4 7,300 32 32 2,000 290 <br /> Detection Limits 50 050 050 0 50 0 50 <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, #1271 <br /> signature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7120369 MPD <1> <br />