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Marathon Ashland Petroleum (3165), Garyville
LDEQ Accident Report
| Accident # | 125901 |
| State Police # | 10-04806 |
| Accident Date | 2010-08-22 |
| Report Date | 2010-08-27 |
| 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 |
| Highly Reactive Volatile Organic Compounds (HRVOCs) | 17h 54m | North Ground Flare | NO | NO | NO | 531.9 pounds |
| Volatile Organic Compounds (VOCs) | 17h 54m | North Ground Flare | NO | NO | YES | 3,855.1 pounds |
| Methane/Ethane Mixture | 17h 54m | North Ground Flare | NO | NO | YES | 1,880.4 pounds |
| Sulfur Oxides | 17h 54m | North Ground Flare | NO | NO | NO | 46,227.2 pounds |
| Hydrogen Sulfide | 17h 54m | North Ground Flare | NO | NO | NO | 501.2 pounds |
Accident Classified As:
Cause of Problem: Equipment Failure
Incident was the result of an electrical problem for the new production unit. A triplicated Triconex level indicator on the 1st stage suction drum malfunctioned, filled with liquid and tripped the wet gas compressor. Drum over-pressured which caused 205-PC-1511-V1 and V2 to open to the North Ground Flare. Released to air.
Discharge Preventable - Under Investigation
LDEQ report states "based on the information obtained during the investigation it appears that this was a reasonably unforeseeable event." All aspects are currently under investigation.
Notes/Remedial Actions
Reportable quantities for sulfur dioxide, hydrogen sulfide, and HRVOCs were exceeded. Remedial actions: The unit 205-delated coker reduced charge rate to minimize the release.
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