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ExxonMobil Chemical Plant (286), Baton Rouge
LDEQ Accident Report
| Accident # | 145241 |
| State Police # | 12-07795 |
| Accident Date | 2012-12-11 |
| Report Date | 2012-12-12 |
| 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 | 7h 10m | NIG | NO | YES | NO | 13.0 pounds |
| Ethylene | 7h 10m | NIG | NO | NO | YES | 122.0 pounds |
| Propylene | 7h 10m | Flare and safety valve | NO | NO | YES | 5,535.0 pounds |
| Flammable Gas | 7h 10m | NIG | NO | NO | YES | 282.0 pounds |
Accident Classified As: Reportable Quantity
Cause of Problem: Under Investigation
ExxonMobil Chemical Plant experience an unanticipated cooling tower water line leak resulting in a shutdown of the Refinery Gas Recovery unit (OLA-1X and EPLA-S) causing 13 pounds of sulfur dioxide, 122 pounds of ethylene, and 29 pounds of propylene to be released as result of flaring. The OLA-1X compressor MC-01 experienced an increased in pressure resulting in an atmospheric safety valve lifting for approximately 45 seconds, released 5,817 pounds of flammable vapos into the atmosphere, 5,506 of which were propylene.
Discharge Preventable - Under Investigation
Notes/Remedial Actions
Unit operating procedures for stabilizing EPLA-S during an unanticipated OLA-1X shutdown were implemented to reduce the environmental impact. Root cause is under investigation. The reportable quantities for ethylene and propylene were exceeded.
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