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Valero (26003), Norco
LDEQ Accident Report
| Accident # | 86947 |
| State Police # | 06-02034 |
| Accident Date | 2006-03-29 |
| Report Date | 2006-04-10 |
| 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 |
| Sulfur Dioxide | 1 h 19 m | Millisecond catalytic cracking unit off gas treatment system | NO | YES | NO | 3,200.0 pounds |
Accident Classified As:
Cause of Problem: Equipment Failure
Due to a problem with off gas treatment system, the off gas did not meet the specification for feedstock use. Therefore, the gas was diverted to the flare while we corrected the problem with the treatment system By visual observation, they discovered that there was another source of gas in the flare. A process safety valve had lifted on the HP overhead receiver for the off gas system The PSV did not reseat automatically.
Discharge Preventable -
Notes/Remedial Actions
Emissions reduced by making adjustments to the MSCCU to reduce the quantity of off gas produced.
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