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P. <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX (415) 364-9233 <br /> .................................... ......... <br /> .............. .............. <br /> ...................... <br /> Engineering, Inc. Client Project ID.- Unocal, Stockton, Pacific/Willow Sampled: Dec 18, 1989:.-..: <br /> x--'P.O. Box 996 <br /> Matrix Descript: Sol[ Received: Dec 18, 11989;:''" <br /> Benicia, CA 94510 <br /> Analysis Method: EPA 5030/8015/8020 Analyzed: Dec 20, 198 <br /> N." <br /> 1989 <br /> ,: <br /> Attention. Mardo Kaprealian, P.E. First Sample#: 912-2441 A ReportedDec 20 <br /> . .................. <br /> :0- <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 /> 9122411 A-B Composite 1 97 0.09 0.42 0.59 10 <br /> 9122412 A-B Composite 2 8.1 N.D. N.D. N.D. 0.47 <br /> 9122413 A-B Composite 3 5.3 N.D. N.D. N.D. 0.19 <br /> 9122414 A-B Composite 4 13 N.D. N.D. N.D. 0.50 <br /> 9122415 A-B Composite 5 79 0.23 0.33 0.32 1.6 <br /> 9122416 A-B Composite 6 13 N.D. N.D. N.D. 0.39 <br /> 9122417 A-13 Composite 7 2.4 N.D. N.D. N.D. 0.22 <br /> 9122418 A-B Composite 8 N.D. N.D. N.D. N.D. N.D. <br /> 9122419 A-13 Composite 9 31 N.D. N.D. N.D. 0.21 <br /> Detection Limits: 1.0 0.05 0.1 0.1 0.1 <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 /> SEQUOIA ANALYTICAL Please Note: <br /> Revised Report dated: 1/10/90 <br /> Belinda C. Vega <br /> Project Manager 9122441.1KE1 <1> <br />