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ExxonMobil Refinery (2638), Baton Rouge

LDEQ Accident Report

Accident #136029
State Police #11-07937
Accident Date2011-12-20
Report Date 2011-12-22
Follow-up Date 2012-03-22
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Anthracene17h 40mPSLA #10 quench line flangeNONONO0.2 pounds
Polynuclear Aromatic Hydrocarbons17h 40mPSLA #10 quench line flangeNONOYES1.9 pounds
Volatile Organic Compounds (VOCs)17h 40mPSLA #10 quench line flangeNONOYES544.8 pounds
Phenanthrene17h 40mPSLA #10 quench line flangeNONONO0.8 pounds
Naphthalene17h 40mPSLA #10 quench line flangeNONOYES0.8 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Seal or Gasket

The release resulted from a leak caused by a loose flange.

Discharge Preventable - No

The release was caused by an unanticipated flange leak.

Notes/Remedial Actions

A pan was placed under the leaking flange to collect oil for reprocessing, and to mitigate further release of the material to soil. The bolts were replaced and tightened which stopped the leak. The contaminated soil was remediated immediately after the leak was isolated. 1.5 barrels of Coker feed (or 63 gallons) was also spilt to soil but is not reported as a specific pollutant emitted. However, coker feed has the same RQ as crude oil (1 barrel or 42 gallons) and is thus exceeded. The RQ for PAHs was also exceeded.