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Marathon Ashland Petroleum (3165), Garyville
LDEQ Accident Report
| Accident # | 121884 |
| State Police # | 10-01135 |
| Accident Date | 2010-03-03 |
| Report Date | 2010-03-05 |
| Follow-up Date | 0000-00-00 |
| Follow-up: |
Pollutants Released
| Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
| Compressed Flammable Gas | 14h 30m | Gas pipe in Unit 43 Fuel Gas System | NO | NO | YES | 212.6 pounds |
| Methane | 14h 30m | Gas pipe in Unit 43 Fuel Gas System | YES | NO | YES | 115.3 pounds |
| Volatile Organic Compounds (VOCs) | 14h 30m | Gas pipe in Unit 43 Fuel Gas System | NO | NO | YES | 50.6 pounds |
| Highly Reactive Volatile Organic Compounds (HRVOCs) | 14h 30m | Gas pipe in Unit 43 Fuel Gas System | NO | NO | NO | 17.2 pounds |
| Ethane | 14h 30m | Gas pipe in Unit 43 Fuel Gas System | NO | NO | YES | 13.9 pounds |
Accident Classified As:
Cause of Problem: Piping or Tubing
Condensate gas was leaking through a pin hole in a piping nipple in the Unit 43 Fuel Gas System. Gas was released to air.
Discharge Preventable - No
Refinery letter states that the two pin-hole leaks discovered in a 3/4 inch pipe nipple were not preventable as the line was insulated so that visual detection of the corrosion in a low point weld seam was not possible.
Notes/Remedial Actions
BRQ. Report states the line was isolated and the line depressurized so that leak could be repaired. This spill did not reach a reportable quantity. A clamp was installed around the pipe nipple to prevent future release at the site. Original report identifies release as compressed flammable gas. Later reports break down release into - HRVOCs, VOCs, Ethane, Methane, and H2.
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