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` SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a 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 /> -----P 0 Box 996 Matrix Descript DI Blank Received ------ <br /> Benicia, <br /> ----- <br /> Benicia, CA 94510 Analysis Method EPA 3510/8015 Extracted Apr 1, 1991 <br /> Attention Mardo Kaprealian, P E First Sample# ------ Analyzed Apr 3, 1991 <br /> Reported Apr 10, 1991 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS (EPA 8015) <br /> Sample Sample High B P. <br /> Number Description Hydrocarbons <br /> Ng/L <br /> (ppb) <br /> ------ Dl Blank ND <br /> Detection Limits- 5o <br /> High Boiling Point Hydrocarbons are quantitated against a diesel fuel standard <br /> Analytes reported as N D were not present above the stated limit of detection <br /> IDEQUOIA ANALYTICAL <br /> -a q/ <br /> Belinda C Vega <br /> Laboratory Director 1030899 KEI <6> <br />