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r <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (415) 686-9600 FAX (415) 686-9689 <br /> Kapreahan Engineering, Inc Client Project ID Unocal,7303 Pacific Ave,Stockton Sampled 10/11-12/90 <br /> P O Box 996 Matrix Descnpt Sod Recerved Oct 15, 1990 <br /> Benicia, CA 94510 Analysis Method EPA 5030/8015/8020 Analyzed Oct 19, 1990 <br /> Attention Mardo Kaprealian, P E First Sample# 010-0432 Reported Oct 29, 1990 <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 /> 010-0432 MW1-(10) N D N D 0 020 N D N D <br /> 010-0433 MW1-(15) N D N D 0 015 N D N D <br /> 010-0434 MW1-(25 5) N D N D 0 023 N D N D <br /> 010-0435 MW1-(35 5) N D N D 0 016 N D N D <br /> • 010-0436 MW1-(55 5) N D N D 0 015 N D N D <br /> 010-0437 MW1-(59) N D N D 0 025 N D N D <br /> 010-0438 MW2-(5 5) N D N D 0 031 N D N D <br /> 010-0439 MW2-(10 5) N D N D 0 020 N D N D <br /> 010-0440 MW2-(15 5) N D N D 0 026 N D N D <br /> 010-0441 MW2-(20 5) N D N D 0 052 N D N D <br /> Detection Limits 1.0 00050 00050 00050 00050 <br /> I <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N D were not present above the stated limit of detection <br /> WGUOIA ANALYTICAL <br /> lra R Malerstein <br /> roject Manager 100432 KEI <1> <br />