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Motiva Enterprises (1406), Norco
LDEQ Accident Report
| Accident # | 89273 |
| State Police # | 06-04436 |
| Accident Date | 2006-07-20 |
| 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 Monoxide | 3h | RCCU CO Heater (EPN# 2-91) | NO | YES | NO | 2,906.8 pounds |
| Sulfur Dioxide | 3h | RCCU CO Heater (EPN# 2-91) | NO | YES | NO | 1,131.7 pounds |
| Volatile Organic Compounds (VOCs) | 3h | RCCU CO Heater (EPN# 2-91) | NO | NO | YES | 56.1 pounds |
| Nitrogen Oxide | 3h | RCCU CO Heater (EPN# 2-91) | NO | YES | YES | BRQ |
| Particulate Matter | 3h | RCCU CO Heater (EPN# 2-91) | NO | YES | NO | BRQ |
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.
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