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Valero (26003), Norco

Releases of Highly Reactive Volatile Organic Compounds (HRVOCs)

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
99427

2007-09-13		No information given.
Cause: The event started around 21:30 on Sept. 13, 2007, when an outlet pipe of the LPG Caustic Prewash Column (V-10-24) failed, causing liquid/vapor LPG (alky feed) to be released to the atmosphere. The system was isolated, and the remaining material vented to the flames at approximately 02:45 on Sept 20, 2007. The depressurization lasted about 3 hrs.

Followup: Yes

Notes: Remedial Actions: Shut down the upstream unit FCCU (MSCCU), isolated and depressurized the vessel, and replaced the failed pipe. / Pollutants: Some material was entrained in fire water used to suppress the release. The remaining material dispersed into the atmosphere. Fire water was treated at the refinery wastewater treatment plant.