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Valero (26003), Norco

LDEQ Accident Report

Accident #114193
State Police #09-1151
Accident Date2009-04-16
Report Date 2009-04-23
Follow-up Date 0000-00-00
Follow-up: No

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Recirculating cooling water26 mFlare No. 1, Flare No. 2NONONO6,000.0 gallons
Sulfur Dioxide26 mFlare No. 1, Flare No. 2NOYESNO1,807.0 pounds

Accident Classified As:

Cause of Problem: Process Upset

Refinery cooling water tower CT-405 experienced a valve malfunction which resulted in a loss of cooling water to our Naphtha Hydrotreating unit (NHT). Due to the lack of cooling water, our NHT stripper overhead pressure increased and caused PSV-39-235 to relieve to the flare. Simultaneously when the CT-405 valve malfunction, the recirculating cooling water was released from the basin to the ground and flowed offsite.

Discharge Preventable - No Information Given

Preventability undetermined.

Notes/Remedial Actions