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ExxonMobil Chemical Plant (286), Baton Rouge

Releases of 1,3 Pentadiene

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
109484

2008-09-23		Storage tank
Cause: The cause of the release was pressure in the feed tanks at the Waste water improvement unit.

Followup: No

Notes: 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.		191.0 pounds