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Marathon Ashland Petroleum (3165), Garyville
LDEQ Accident Report
| Accident # | 148974 |
| State Police # | 13-02421 |
| Accident Date | 2013-05-31 |
| Report Date | 2013-06-05 |
| Follow-up Date | 2013-10-23 |
| Follow-up: | Yes |
Pollutants Released
| Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
| Propylene | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | NO | YES | 0.8 pounds |
| Propane | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | NO | YES | 0.4 pounds |
| NOx | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | NO | YES | 0.1 pounds |
| Carbon Monoxide | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | YES | NO | 0.4 pounds |
| Volatile Organic Compounds (VOCs) | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | NO | YES | 1.1 pounds |
| Particulate Matter 10 | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | YES | NO | 0.0 pounds |
| Particulate Matter 2.5 | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | YES | NO | 0.0 pounds |
| Highly Reactive Volatile Organic Compounds (HRVOCs) | 2d 8h | North Stick Flare (EQT 162/EIQ 83-74) | NO | NO | NO | 0.8 pounds |
Accident Classified As: Below Reportable Quantity (BRQ)
Cause of Problem: Equipment Failure
On May 31, 2013, while discharging a propylene tank truck, the operator noticed that the propylene unloading drum was leaking to the North Stick Flare. There were no known offsite impacts.
Discharge Preventable - No
The failure of the bypass valve was not anticipated.
Notes/Remedial Actions
Shutdown the unloading of the tank truck and blocked in the propylene drum to prevent any additional product into the drum. To reduce pressure, the liquid in the drum was pumped down from 50% to 20% and routed to the spheres. Both the truck and rail racks were shutdown. The bypass valve will be replaced An additional followup on 10/23/13 corrected the initial followup report's emissions data regarding greenhouse gas releases.
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