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ExxonMobil Refinery (2638), Baton Rouge
LDEQ Accident Report
| Accident # | 114924 |
| State Police # | 09-02370 |
| Accident Date | 2009-05-12 |
| Report Date | 2009-05-19 |
| 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 |
| Sulfur Dioxide | 10m | flare system | NO | YES | NO | 836.0 pounds |
| Volatile Organic Compounds (VOCs) | 10m | flare system | NO | NO | YES | 500.0 pounds |
| Hydrogen Sulfide | 10m | flare system | NO | NO | NO | 100.0 pounds |
Accident Classified As: Reportable Quantity
Cause of Problem: Human Factors
Personnel was making valve alignment changes when a block valve on the suction of the coker compressor was inadvertently closed. This caused the pressure to build in the overhead system until the pressure exceeded that of pressure vent set point. The pressure vents opened, resulting in overhead vapor to be released to the flare system, which resulted in the flaring of the hydrocarbon.
Discharge Preventable - Yes
No further information provided.
Notes/Remedial Actions
The RQ for SO2 was exceeded. The valve was reopened. Additional training and discussion was held for the personnel about the importance of valve misalignment. Company letter and State Police HAZMAT report differs on pollutant released.
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