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Valero (26003), Norco

LDEQ Accident Report

Accident #99427
State Police #07-05491
Accident Date2007-09-13
Report Date 2007-09-20
Follow-up Date 0000-00-00
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Highly Reactive Volatile Organic Compounds (HRVOCs)No information given.No information given.NONONOBRQ

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Equipment Failure

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.

Discharge Preventable -

Notes/Remedial Actions

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.