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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (415) 686-9600 • FAX (415) 686-9689 <br /> Kaprealian Engineering, Inc Client Project ID Unocal,7303 Pacific Ave,Stockton Sampled -- ---- - <br /> P <br /> - ---- <br /> P 0 Box 996 Sample Descnpt DI Blank Received ------ <br /> Benicia, <br /> ----- <br /> Benicia, CA 94510 Analysis Method EPA 5030/8015/8020 Analyzed Apr 9, 1991 <br /> Attention Mardo Kaprealian, P E "Lab Number ------ Reported Apr 10, 1991 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS WITH BTEX DISTINCTION (EPA 8015/8020) <br /> Analyte Detection Limit Sample Results <br /> pg/L(ppb) pg/L(ppb) <br /> Low to Medium Boding Point Hydrocarbons 30 N D <br /> Benzene 030 N D <br /> Toluene 030 N D <br /> Ethyl Benzene 0 30 N D <br /> Xylenes 030 N D <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> [ • dr- <br /> Belinda C Vega <br /> Laboratory Director 1030899 KEi <2> <br />