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|State Police #||14-03067|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Methane||21m||Unit 215, Hydrocracking Unit||YES||NO||YES||12.0 pounds|
|Ethane||21m||Unit 215, Hydrocracking Unit||NO||NO||YES||2.8 pounds|
|Propane||21m||Unit 215, Hydrocracking Unit||NO||NO||YES||3.2 pounds|
|n-Butane||21m||Unit 215, Hydrocracking Unit||NO||NO||NO||1.4 pounds|
|Hydrogen||21m||Unit 215, Hydrocracking Unit||NO||NO||NO||435.1 pounds|
|Hydrogen Sulfide||21m||Unit 215, Hydrocracking Unit||NO||NO||NO||4.6 pounds|
Accident Classified As: Below Reportable Quantity (BRQ)
While checking the 215-PSV-7006 cold HP separator for a leak, the downstream 12-inch block valve was closed and a leak developed around the valve bonnet gasket. The leak size was assumed to be 1/64-inch in thickness and 2 inches in width based on operator reports. Emission occurred in Unit 215, Hydrocracking Unit.
Results of internal investigation will determine whether release was preventable.
The line containing the valve was blocked in and the pressure reduced. An incident investigation will result in recommendation items designed to prevent the recurrence of this event.