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Marathon Ashland Petroleum (3165), Garyville

LDEQ Accident Report

Accident #115720
State Police #091845
Accident Date2009-06-16
Report Date 2009-06-23
Follow-up Date 2009-09-25
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Ethylene90 minutesexchanger 05-1313NONOYES0.1 pounds
Propane90 minutesexchanger 05-1313NONOYES5.3 pounds
Propylene90 minutesexchanger 05-1313NONOYES2.8 pounds
Isobutane90 minutesexchanger 05-1313NONOYES0.7 pounds
n-Butane90 minutesexchanger 05-1313NONONO4.2 pounds
1-Butene90 minutesexchanger 05-1313NONOYES3.6 pounds
1-Pentene90 minutesexchanger 05-1313NONOYES2.5 pounds
n-Pentane90 minutesexchanger 05-1313NONONO9.1 pounds
Pentene90 minutesexchanger 05-1313NONONO65.3 pounds
Hexane90 minutesexchanger 05-1313NONONO68.4 pounds
Hydrogen Sulfide90 minutesexchanger 05-1313NONONO0.1 pounds

Accident Classified As:

Cause of Problem: Equipment Failure

Pinhole leak from exchanger, 05-1313, caused a release of naphtha to the coker unit pad.

Discharge Preventable - No

the exchanger release was as unforeseeable failure.

Notes/Remedial Actions

the exchanger was isolated, and contents were directed to the oily water sewer.