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|State Police #||13-05734|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Propylene||9d 21h 30m||pressure relief valve||NO||NO||YES||BRQ|
Accident Classified As: Below Reportable Quantity (BRQ)
On December 24th 2013, Shell Chemical's OL5 operations discovered a pressure relief valve opening to the OL5 flare system.
OL-5 operations began working to remove non condensables in an attempt to get the relief valve to close. To close the pressure relief valve and stop the flow to the flare system, operations reduced the pressure upstream of the pressure relief valve, returning the unit to safe, normal operating conditions.