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ExxonMobil Refinery (2638), Baton Rouge

Releases of 2,2,4-Trimethylpentane

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
05-BB009-1787

2005-06-13		tank 766
Cause: level gauge on tank 766 was not responding correctly. Chemicals began flowing out of the drain on the tank.

Followup: Yes

Notes: foam was sprayed on the tank to reduce exposure and fire potential. The tank was slowly emptied to ensure the roof did not shift and damage the tank.		24,618.0 pounds
118829

2009-10-17		transfer piping
Cause: Failure of line of transfer piping from gasoline tankage to loading line due to corrosion at the air-soil interface of piping.

Followup: No

Notes: RQ exceeded. Isolated line with blind installation. Replaced with new piping and special program has been initiated to emphasis piping that may be subject to air-soil interface corrosion. Contaminated soil removed. The refinery letter misstates that the accident occurred on 08/21/09. The following RQs were exceeded: xylene, toulene, ethylbenzene, napthalene, benzene, n-hexane, cyclohexane, 2,2,4-trimethylpentane, VOCs, oil to soil, and flammable vapor.		13,217.0 pounds
143543

2012-08-29		2795-V6, Refinery Tank Farm
Cause: ExxonMobil Refinery Plant reported several operating compliance matters and potential RQ exceedances resulting from upset conditions caused by Hurricane Isaac. Tank 109: An external roof vent was discovered missing on tank 109. There was no damage to the floating roof of this tank and there are no additional emissions from the missing vent on the external roof of tank 109. Tank Socks: Multiple tank socks were discovered missing. Tank 785 Pontoon Covers: Four pontoon covers were discovered blown off tank 785. External Storage: No flaring occurred as a result of the temporary shutdown/curtail of butane and isobutane to alternative despositions to eliminate potential flaring Continuous Emissions Monitoring System (CEMS): CEMS analyzers at the BRRF may have experienced less than 90% data availability.

Followup: No

Notes: Tank 109: There were no additional emissions from the missing vent on the external roof of tank 109. Tank Socks: The missing socks will be replaced as soon as possible (or within 45 days). Tank 785 Pontoon Covers: Upon discovery, the pontoon covers were repositioned. There were no excess emissions. External Storage: No flaring occurred as a result of the temporary shutdown/curtail of butane and isobutane to alternative despositions to eliminate potential flaring Continuous Emissions Monitoring System (CEMS): ExxonMobil is working to determine the extent to which the CEMS analyzers may have malfunctioned. The findings will be included in the CEMS quarterly report. The report lists a summary of estimated pounds released until repairs. The report suggests that estimates are assuming it would take 45 days to make necessary repairs.		0.3 pounds