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ExxonMobil Refinery (2638), Baton Rouge

LDEQ Accident Report

Accident #142046
State Police #12-05337
Accident Date2012-08-11
Report Date 2012-08-17
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
Oil (Sheen)1h 30mRain Basin 2 - Outfall 003NONONO0.1 gallons

Accident Classified As: Reportable Quantity

Cause of Problem: Weather

A heavy rainfall event occured resulting in Rain Basin 2 to overlflow through Outfall 003 into Callahan's Bayou and then into the Mississippi River. The sheen was approximately 50ft X 30ft, and the volume released was less than 2 cups of oil. ExxonMobil deployed additional containment boom immediately upon an employee's discovery of the sheen. Investigation efforts to determine root cause analysis are still under investigation.

Discharge Preventable - Yes

Notes/Remedial Actions

Upon discovery boom was deployed to contain and absorb the sheen. Investigation efforts to identify root cause of oil are inconclusive. ExxonMobil will continue to monitor for potential oil in sewers and collection system to detect and mitigate potential spills. Upset description states that the River Basin 2 overflow through the Outfall 003 started on August 9, 2012 at 17:57 hours and continued until cessation on August 12, 2012 at 20:06 hours. Thus, the overflow occurred for 3 days, 2 hours, 9 minutes.