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ex CHEVRON RESEARCH AND TECHNOLOGY COMPANY INTEGRATED LABORATORY TECHNOLOGIES UNIT PROJECT SUMMARY Project No 1999 0086 Requested by B L Hunter Date Initiated 815199 Location Chevron Products Co Date Completed 9/20/99 P O Box 6004, L-1100 CRTC Charge Code YWTT109227 San Ramon, CA 94583-0904 Phone 842-8695 Project Description- Analyze a hydrocarbon sample labeled MW-4 SPH and two water samples labeled MW-3 and MW-4, taken from Chevron service station number 9-8264 at 3775 Tracy Blvd , Tracy, CA Identify any hydrocarbon, determine if oxygenates are present, and if possible, determine age of the product Compare to three reference gasolines taken from pump 12 - grades 87, 89, and 92 Compare to previous analyses (Projects 1999 0060, 6/99, and 1995 0233, 1 1/95 } Results Sample MW-4 SPH contains unleaded gasoline It matches gasoline from the same well submitted earlier this year (project 1999 0060) which was shown to be a Chevron fuel by the presence of a proprietary additive The water to MW-4 contains approximately €70 mg/L entrained gasoline The chromatogram closely resembles that of the MW-4 product The water in MW-3 contains approximately 5 mg/L hydrocarbon comprised of C, to C4 gasoline constituents The samples were analyzed for the presence of oxygenates Results are shown in the table MTBE, mg/kg* TAME, mg/kg MW-4 SPH EPA 8260 rid < 300 not measured MW-4 6/99 ASTM D4815 rid < 1000 rid < 1000 MW-4 water EPA 8260 11,200 µg/l_ not measured MW-3 water EPA 8260 2,740 µg/L, not measured 87 octane EPA 8260 86,000 not measured 87 octane ASTM D4815 92,000 02 89 octane EPA 8260 2,420 not measured 89 octane ASTM D4815 2,200 rid <0 1 92 octane EPA 8260 132,000 not measured 92 octane ASTM D4815 110,000 0 94 * except as marled Both MW-4 phase-separated gasolines were compared to the reference gasolines Visually there is no exact match to the references The leaked gasoline could be either 89 or 92 octane A mathematical correlation of the region of the chromatogram most likely to show differences between fuels showed that the 89 octane grade is a slightly better match However, the 89 and 92 octane samples were nearly