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` SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> Waprealian Engineering, Inc Client Project ID Unocal#5421,Stockton 73D3 Pacific Sampled Dec 13, 1989 <br /> P O Box 996 Matrix Descrlpt Water Received Dec 14, 1989 <br /> Benicia, CA 94510 Analysis Method EPA 3510/8015 Analyzed Dec 14, 1989 <br /> Attention Mardo Kapreallan, P E First Sample# 912-1749 B-C Reported Dec 15, 1989 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS (EPA 8015) <br /> Sample Sample Low/Medium B P. <br /> Number Description: Hydrocarbons <br /> pg/L <br /> (Ppb) <br /> 9121749 B-C w1 160 <br />• <br /> Detection Limits 300 <br /> 1 <br /> Low to Medium Boding Point Hydrocarbons are quantitated against a gasoline standard <br /> Analyles reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL <br /> Arthur G Burton <br /> Laboratory Director 9121749 KEI <6> <br />