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|State Police #||05-0920|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Propane||5h 40m||flange||NO||NO||YES||280.2 pounds|
|Propylene||5h 40m||flange||NO||NO||YES||117.2 pounds|
|Isopropyl Ether||5h 40m||flange||NO||NO||NO||4.0 pounds|
Accident Classified As: Reportable Quantity
An assistant operator found a flange on a level instrument tap leaking at the top of a tower. Immediately the tower feed was shut off, and the operator began to controllably depressure the tower to the flare system so that the leak could be repaired.
This was an unpredictable flange gasket failure. The gasket was made of a material compatible with this service.
Immediately feed was cut out of the tower. It was depressured as quickly as possible so that the leak could be repaired. The flange gasket has been replaced. Per ExxonMobil Chemical's usual procedures, the next time the tower is scheduled to go on turnaround at the end of 2006, all the tower gaskets will be replaced.