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ExxonMobil Refinery (2638), Baton Rouge
LDEQ Accident Report
| Accident # | 112566 |
| State Police # | 09-00615 |
| Accident Date | 2009-02-06 |
| Report Date | 2009-02-13 |
| 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 |
| Flammable Vapor | 20m | atmospheric safety valve | NO | NO | YES | 3,280.0 pounds |
Accident Classified As: Reportable Quantity
Cause of Problem: Instrument Failure
An atmospheric safety valve was lifted on the Opelousas Natural Gas header at Baton Rouge Refinery. the pressure of the header is maintained through a control valve, which opens to a lower pressure header. The control valve pressure instrument to the low pressure header failed in an open position, causing the pressure in the header to reach the release pressure of the safety valve.
Discharge Preventable - No
Incident was caused by a failed valve pressure control instrument, which was swapped out of service within 20 minutes of release discovery.
Notes/Remedial Actions
Pressure instrument was replaced before returning to service. The RQ for flammable vapor was exceeded.
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