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ExxonMobil Chemical Plant (286), Baton Rouge

Releases of styrene monomer

LDEQ Accident Number
Accident Date
Point Source(s) Notes Amount of Release

Cause: Styrene monomer tank experienced a roof failure, cause undetermined. The tank was in the process of being de-inventoried and transfer to another tank remains underway. During transfer of crude styrene from one storage tank to another the roof of storage tank MV-816 failed.


Notes: They have begun an air monitoring plan, testing for Styrene and LEL. Slight odor at the tank but nothing detected outside fence line. They do not believe any RQ were exceeded.
900.0 pounds

line leak at flange
Cause: They had a line that has leaked at a flange and is causing the release. They are isolating the line to stop the leak.

Followup: no

Notes: Benzene was released at .67 lbs/hr. Butadiene was released at .11 lbs/hr. Hydrocarbon gas was released at 18.77 lbs/hr. Styrene Monomer was released at 50.41 lbs/hr. Ethylbenzene was released at 30.16 lbs/hr. Toluene was released at 120.66 lbs/hr.