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Marathon Ashland Petroleum (3165), Garyville
LDEQ Accident Report
| Accident # | No LDEQ Number Available |
| State Police # | 13-01306 |
| Accident Date | 2013-07-24 |
| Report Date | 2013-07-29 |
| 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 |
| Sulfur Dioxide | 60 M | Unit 250 North Ground Flare | NO | YES | NO | 613.0 pounds |
| Ethane | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 6.2 pounds |
| Ethylene | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 0.1 pounds |
| Propane | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 58.3 pounds |
| n-Butane | 60 M | Unit 250 North Ground Flare | NO | NO | NO | 123.1 pounds |
| Isobutane | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 65.7 pounds |
| 1-Butene | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 0.4 pounds |
| Pentene Plus | 60 M | Unit 250 North Ground Flare | NO | NO | NO | 101.2 pounds |
| Hydrogen Sulfide | 60 M | Unit 250 North Ground Flare | NO | NO | NO | 6.7 pounds |
| NOx | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 25.2 pounds |
| Carbon Monoxide | 60 M | Unit 250 North Ground Flare | NO | YES | NO | 137.3 pounds |
| Volatile Organic Compounds (VOCs) | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 350.2 pounds |
| Particulate Matter 10 | 60 M | Unit 250 North Ground Flare | NO | YES | NO | 2.8 pounds |
| Particulate Matter 2.5 | 60 M | Unit 250 North Ground Flare | NO | YES | NO | 2.8 pounds |
| Highly Reactive Volatile Organic Compounds (HRVOCs) | 60 M | Unit 250 North Ground Flare | NO | NO | NO | 0.3 pounds |
| Carbon Dioxide | 60 M | Unit 250 North Ground Flare | YES | NO | NO | 370.7 pounds |
| Methane | 60 M | Unit 250 North Ground Flare | YES | NO | YES | 2.5 pounds |
| Nitrous Oxide | 60 M | Unit 250 North Ground Flare | YES | YES | YES | 0.5 pounds |
| Propylene | 60 M | Unit 250 North Ground Flare | NO | NO | YES | 0.2 pounds |
Accident Classified As: Reportable Quantity
Cause of Problem: Process Upset
On July 24, 2013, the Unit 210 Crude Overhead Compressor shut down at 16:11 hours and was restarted at 16:26 hours. A second shutdown occurred at 16:48 hours and was restarted at 17:02 hours. A third shutdown occurred at 17:25 hours and was re-started at 17:56 hours. The duration of Unit 210 venting to the North Ground Flare was 60 minutes. Approximately 613 pounds of sulfur dioxide were released (over the reportable quantity of 500 pounds).
Discharge Preventable - Under Investigation
The results of the Root Cause Analysis will determine whether or not the event was preventable. A very similar event on March 25, 2013 (LDEQ 147603) was labeled as preventable.
Notes/Remedial Actions
Liquid was drained from the Unit 210 Compressor Suction Drum. The Unit 210 Crude Overhead Compressor was re-started. A very similar event occurred on March 25, 2013 with emissions from the same point source. This report retrieved from EDMS was labeled with the LDEQ number corresponding to the March 25, 2013 incident (LDEQ # 147603). The March 25th event also involved multiple shutdowns of the Unit 210 Crude Overhead Compressor, and the report labeled that event as preventable. It is interesting to note that a similar event labeled preventable occurred less than four months later.
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