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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br />• (415) 686-9600 0 FAX (415) 686-9689 <br /> Kaprealian Engineering, Inc Client Project ID Unocal, 7303 Pacific Ave , Stockton Sampled Jun 26, 1991 <br /> P O Box 996 Matrix Descript Water Received Jun 26, 1991 <br /> Benicia, CA 94510 Analysis Method EPA 5030/8015/8020 Analyzed Jul 3, 1991 <br /> Attention Mardo Kapreallan, P E First Sample # 106-0740 A-B Reported Jul 11, 1991 <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 /> Ng/L Ns/L pg/L pg/L pg/L <br /> (ppb) (Ppb) (ppb) (ppb) (Ppb) <br /> 106-0740 A-B Mw1 N D N D N D 1 7 N D <br /> 106-0741 A-B Mw2 N D N D N D N D N D <br /> 106-0742 A-B Mw3 N D N D N D 050 N D <br /> 106-0743 A-B Mw4 N D N D N D N D N D <br /> Detection Limits 30 030 030 030 030 <br /> Low to Medium Soiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N D were not present above the stated limit of detection <br />&UOIA ANALYTICAL <br /> off- <br /> Belinda C Vega <br /> Laboratory Director 1060740 KEt n> <br />