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u SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364 9600 • FAX (415) 364-9233 <br /> �Kaprealian Engineering, Inc Client Project ID Unocal, Stockton, 7303 Pacific Sampled Dec 7, 1989 <br /> P O Box 9% Matrix Descript Soil Received Dec 7, 1989 <br /> Benicia, CA 94510 Analysis Method EPA 5030/8015/8020 Analyzed Dec 8, 1989 <br /> Attention Mardo Kaprealian, P E First Sample# 912-0649 Reported Dec 12, 1989 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS with BTEX DISTINCTION (EPA 8015/8020) <br /> Sample Sample Low/Medium B P. Ethyl <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> mg/kg mg/kg mg/kg mg/kg mg/kg <br /> (ppm) (ppm) (Ppm) (ppm) (ppm) <br /> 912-0649 SW3(20/13) N D N D N D N D N D <br /> 912-0650 SW3(20/19) N D N D N D N D N D <br /> • <br /> Detection Limits 1.0 005 01 0 1 01 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analyies reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> (t- rthur G Burton <br /> Laboratory Director 9120649 KEI <3> <br />