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ExxonMobil Refinery (2638), Baton Rouge
LDEQ Accident Report
| Accident # | 127179 |
| State Police # | 10-06175 |
| Accident Date | 2010-10-21 |
| Report Date | 2010-10-26 |
| 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 |
| Methane | 6 m | Mixed Gas Oil tankage | YES | NO | YES | 861.0 pounds |
Accident Classified As: Below Reportable Quantity (BRQ)
Cause of Problem: Maintenance/Procedures
The incident took place at the Mixed Gas Oil tankage. The flow valves that supply methane to the tanks fully opened when the computer control system was upgrading. The methane exceeded the tanks' vapor recovery unit, therefore their atmospheric vents opened releasing the gas.
Discharge Preventable - Yes
No further information provided.
Notes/Remedial Actions
The computer system was returned to service, and the valve was shut. The Methane flow valve will now be manually closed when computer system is shutdown. Exxon exceeded the reportable quantity threshold for flammable vapors when combined with a second release that occurred within 24 hours.The second release had the LDEQ number 127174. Combined 1,563 pounds for both incidents. Although the 2 individual incidents are BRQ, the combined sum of 1,563 pounds is RQ.
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