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Accident # | 133997 |
State Police # | 11-05778 |
Accident Date | 2011-09-16 |
Report Date | 2011-09-21 |
Follow-up Date | 0000-00-00 |
Follow-up: | No |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Propane | 20 m | Unit 259 North Ground Flare | NO | NO | YES | 684.9 pounds |
Propylene | 20 m | Unit 259 North Ground Flare | NO | NO | YES | 1,008.0 pounds |
Isobutane | 20 m | Unit 259 North Ground Flare | NO | NO | YES | 0.4 pounds |
Nitric Oxide | 20 m | Unit 259 North Ground Flare | NO | YES | NO | 176.7 pounds |
Carbon Monoxide | 20 m | Unit 259 North Ground Flare | NO | YES | NO | 148.6 pounds |
Particulate Matter 10 | 20 m | Unit 259 North Ground Flare | NO | YES | NO | 13.5 pounds |
Ethane | 20 m | Unit 259 North Ground Flare | NO | NO | YES | 0.1 pounds |
Accident Classified As: Reportable Quantity
On 9/16/11, level transmitted 205-LC-2050 failed which resulted in the filling of the Unit 205 C3/C4 Overhead Drum. This caused a pressure increase in the C3/C4 Splitter that led to the opening of the relief valve, 205-PSV-7077. This valve is routed to the flare header and the North Ground Flare.
No, the level indicator failed without warning.
The unit vessel levels were manually adjusted to stop the over-pressure condition. The level transmitter, 205-LC-2050, was repaired. An incident investigation is ongoing. C3/C4 Splitter Overhead leaked for 20 min. Report says the leak lasted 10 min but the release lasted 20 min.
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