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ExxonMobil Chemical Plant (286), Baton Rouge

LDEQ Accident Report

Accident #109484
PDF AvailablePDF
State Police #08-06190
Accident Date2008-09-23
Report Date 2010-03-24
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
Isoprene16 mStorage tankNONOYES100.0 pounds
1,3 Pentadiene16 mStorage tankNONONO191.0 pounds
Flammables16 mStorage tankNONONO3,139.0 pounds
Butadiene16 mStorage tankNONOYES36.0 pounds
Benzene16 mStorage tankNONOYES548.0 pounds

Accident Classified As: No Information Given

Cause of Problem: Process Upset

The cause of the release was pressure in the feed tanks at the Waste water improvement unit.

Discharge Preventable - No Information Given

Notes/Remedial Actions

A storage tank vented for 16 m. The cause of the release was pressure in the feed tanks at the waste water improvement (WILA) unit exceeded the vacuum vent setting for 14 m. The light material entered the flare knock out drum at the Olefins unit through a safety valve bypass which was left open inadvertently during the start up after Gustav. Manual error is the root cause. LDEQ said they would take this up at the next inspection. Exxon's written report was received on 10/6/08.