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Valero (26003), Norco

LDEQ Accident Report

Accident #93013
State Police #07-00016
Accident Date2007-01-02
Report Date 2007-01-09
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
Sulfur Dioxide0 h 30 mEQT 013 and Eqt 007NOYESNO5,257.0 pounds

Accident Classified As:

Cause of Problem: Equipment Failure

An LPG line in the East Plant froze, and excess LPG was received in the feed from the Coker to the NHT Unit. The NHT stripper over-pressured and excess gas was diverted to the refinery flare system.

Discharge Preventable -

Notes/Remedial Actions

The Coker LPG pump was shut down to relieve pressure off of the line and rates to the unit were reduced. The pump was restarted, line service was restored and rates were gradually increased.