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ExxonMobil Refinery (2638), Baton Rouge

LDEQ Accident Report

Accident #143543
PDF AvailablePDF
State Police #No Information Given
Accident Date2012-08-29
Report Date 2012-09-04
Follow-up Date 0000-00-00
Follow-up: No

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
2,2,4-TrimethylpentaneNIG2795-V6, Refinery Tank FarmNONOYES0.3 pounds
BenzeneNIG2795-V6, Refinery Tank FarmNONOYESBRQ
BiphenylNIG2795-V6, Refinery Tank FarmNONOYESBRQ
CresolNIG2795-V6, Refinery Tank FarmNONOYESBRQ
CumeneNIG2795-V6, Refinery Tank FarmNONOYESBRQ
EthylbenzeneNIG2795-V6, Refinery Tank FarmNONOYES0.1 pounds
Hydrogen SulfideNIG2795-V6, Refinery Tank FarmNONONOBRQ
NaphthaleneNIG2795-V6, Refinery Tank FarmNONOYESBRQ
n-HexaneNIG2795-V6, Refinery Tank FarmNONONO0.2 pounds
PhenolNIG2795-V6, Refinery Tank FarmNONONOBRQ
StyreneNIG2795-V6, Refinery Tank FarmNONONOBRQ
TolueneNIG2795-V6, Refinery Tank FarmNONONO0.2 pounds
XyleneNIG2795-V6, Refinery Tank FarmNONONO0.3 pounds

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Other - See text

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.

Discharge Preventable - No Information Given

Notes/Remedial Actions

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.