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ExxonMobil Refinery (2638), Baton Rouge

LDEQ Accident Report

Accident #136413
State Police #12-00131
Accident Date2012-01-09
Report Date 2012-01-16
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
Hexane2mPHLA unit T-2 towerNONONO8.9 pounds
Benzene2mPHLA unit T-2 towerNONOYES6.6 pounds
Flammable Vapor2mPHLA unit T-2 towerNONOYES2,220.0 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Instrument Failure

Normal operating overhead pressure was exceeded on the PHLA unit T-2 tower due to a pressure controller valve malfunction.

Discharge Preventable - No

Not preventable due to unanticipated overpressure of the T-2 tower.

Notes/Remedial Actions

The bypass valve was opened to reduce tower pressure, the safety valve was reset, and the unit was returned to normal operating conditions. The pressure controller instrument was replaced immediately following the event. Only the reportable quantity for flammable vapor was exceeded.