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RED <br /> CHEVRON RESEARCH AND TECHNOLOGY COMPANY JUN 9 1992 <br /> ANALYTICAL SCIENCES UNIT ENVIRONMENTAL HEALTH <br /> PROJECT SUMMARY PERMIT/SERVICES <br /> Log Number: 4691 Requested by: N.L. Vukelich <br /> Sample Received: 02/15/91 Location: Chevron USA <br /> Date Reported: 02/26/91 2410 Camino Ramon <br /> Project Number: TT2806 San Ramon, Ca.94583 <br /> Phone: CTN 842-9581 <br /> Project Description: <br /> Analyze one sample taken on 2/1/91 from former Chevron service <br /> station #94054 at 2103 Country Club in Stocton Ca. This station has <br /> been subsequently leased by Arco. Identify the hydrocarbon sample <br /> to determine if it could have been a Chevron product. No Arco <br /> reference samples were sent for direct comparison of detergent <br /> additive and hydrocarbon composition. <br /> Results• <br /> Analysis shows the sample is a gasoline which contains 0. 17 g/gal <br /> lead. No Techroline was detected. The sample appears to have a <br /> polybutene succinimide detergent additive similar to that used by <br /> Arco. The gasoline contains some thermally cracked blending stock. <br /> Arco's Carson refinery produces thermal gasoline, Chevron's <br /> Richmond refinery does not. The sample appears to be about 20-30 % <br /> evaporated. Accounting for evaporation, the lead content was <br /> originally about . 12g/gal, typical of gasoline produced between <br /> 1986 and 1988. <br /> Analytical Approach: <br /> The sample was analyzed by gas chromatography using a flame <br /> ionization detector to determine the hydrocarbon composition and an <br /> electron capture detector to measure the lead alkyl isomer <br /> distribution. Detergent additive was measured by solid phase <br /> extraction and analysis by infrared spectroscopy. <br /> Analyzed by: N. Berkowitz <br /> Reported by: N. Berkowitz <br /> Reviewed by: E. A. Harvey <br /> NLVukelich-1 THGouw-1 NBerkowitz-1 <br /> DAKohler-1 AWVerstuyft-1 EAHarvey-1 <br /> File-1 Tech files 300. 6110 <br />