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Motiva Enterprises (1406), Norco

LDEQ Accident Report

Accident #89273
PDF AvailablePDF
State Police #06-04436
Accident Date2006-07-20
Report Date 2006-12-13
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
Carbon Monoxide3hRCCU CO Heater (EPN# 2-91)NOYESNO2,906.8 pounds
Sulfur Dioxide3hRCCU CO Heater (EPN# 2-91)NOYESNO1,131.7 pounds
Volatile Organic Compounds (VOCs)3hRCCU CO Heater (EPN# 2-91)NONOYES56.1 pounds
Nitrogen Oxide3hRCCU CO Heater (EPN# 2-91)NOYESYESBRQ
Particulate Matter3hRCCU CO Heater (EPN# 2-91)NOYESNOBRQ

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Start Up, Shut Down

Motiva's Residual Catalytic Cracking Unit (RCCU) was shutdown and restarted, releasing materials through the RCCU flue gas scrubber stack. During the RCCU shutdown, incomplete combustion of CO was attributed to high oxygen content in the CO heater firebox. The increase in oxygen was a result of cooling air being directed into the CO heater's CO annulus vua the unit's I-5 trip system. This system was tripped (open) during the initial shutdown of the unit, and was not reset (closed) prior to the restart of the RCCU.

Discharge Preventable - Yes

Notes/Remedial Actions

Operations notified the Site Supervisor and took steps to minimize emissions resulting from the release. The cooling air to the CO annulus was reset and closed. Existing RCCU operating procedures regarding the rest of air to CO annulus have been amended.