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ExxonMobil Refinery (2638), Baton Rouge

LDEQ Accident Report

Accident #134402
PDF AvailablePDF
State Police #11-06210
Accident Date2011-10-05
Report Date 2011-10-11
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
Volatile Organic Compounds (VOCs)8 h 40 mE-2 Condenser into CT 18NONOYES1,441.7 pounds
n-Hexane8 h 40 mE-2 Condenser into CT 18NONONO111.3 pounds
Cyclohexane8 h 40 mE-2 Condenser into CT 18NONOYES32.2 pounds
Benzene8 h 40 mE-2 Condenser into CT 18NONOYES25.8
Xylene8 h 40 mE-2 Condenser into CT 18NONONO0.6 pounds
Toluene8 h 40 mE-2 Condenser into CT 18NONONO0.6 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Piping or Tubing

On 10/5/11 at approximately 7:25 pm, the Baton Rouge Refinery discovered a release. A leak was discovered by operations personnel during structured rounds at the Pipestill #9 Unit. The release source was determined by a cooling tower, and investigation determined that heat exchangers in the E-2 bank were allowing hydrocarbon to enter the cooling water system. Upon discovery, personnel lowered the E-2 hydrocarbon pressure. By maintaining the hydrocarbon pressure below the cooling water pressure, hydrocarbon will not be released into the water. Gas testing performed in the area confirms that the release ended when the hydrocarbon pressure was lowered. Review of Pipestill #9 operations indicate the release likely began around noon on 10/5.

Discharge Preventable - No Information Given

No Information Given.

Notes/Remedial Actions

Weather conditions at the time of this release: 87 degrees, 6 mph wind from the east, no precipitation. To end the release, the hydrocarbon pressure was lowered, By maintaining the tower pressure below the cooling water pressure, hydrocarbon will not be released into the water. To prevent recurrence, the hydrocarbon pressure was lowered. The computer control system has been adjusted to minimize the tower pressure. A permanent bundle repair will be completed the next time the exchangers are removed from service. Reportable quantities of benzene and naptha were exceeded.