Home Search Emissions Pollutants About the Database

ExxonMobil Chemical Plant (286), Baton Rouge

LDEQ Accident Report

Accident #121936
PDF AvailablePDF
State Police #10-01178
Accident Date2010-03-05
Report Date 2010-03-12
Follow-up Date 0000-00-00

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Hydrogen2 h 39 mKnock-out drum D-28NONONO7.8 pounds
Carbon Monoxide2 h 39 mKnock-out drum D-28NOYESNO86.7 pounds
Water2 h 39 mKnock-out drum D-28NONONO198.5 pounds
Hydrogen Cyanide2 h 39 mKnock-out drum D-28NONONO0.9 pounds
Carbon Dioxide2 h 39 mKnock-out drum D-28YESNONO8,296.8 pounds
Hydrogen Sulfide2 h 39 mKnock-out drum D-28NONONO76.3 pounds

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Process Upset

Vent on a drum popped open. Root cause was high liquid level in the drum and vent valve relieved as per design.

Discharge Preventable - Yes

Notes/Remedial Actions

During normal operations, the acid gas is incinerated at furnaces F-5 and F-6. Before going to the incinerators, the liquid is removed from the steam at a knock out drum, D-28. The cause of the high liquid level is under investigation. Upon completion of this investigation, this event will be reviewed with all operating personnel and investigation recommendations will be tracked and steqarded to ensure completion. SPOC report said 126 of hydrogen sulfide were released, Exxon's report says 76.3 lbs were released. The D-28 liquid level was drained, per procedure, which allowed the vent valve to re-set in the closed position.