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Valero (26003), Norco
LDEQ Accident Report
| Accident # | 144411 |
| State Police # | 12-07236 |
| Accident Date | 2012-11-05 |
| Report Date | 2012-11-09 |
| Follow-up Date | 2012-12-21 |
| Follow-up: | Yes |
Pollutants Released
| Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
| Carbon Monoxide | 0h22m | Flare 1 and 2 | NO | YES | NO | 137.0 pounds |
| NOx | 0h22m | Flare 1 and 2 | NO | NO | YES | 25.0 pounds |
| Particulate Matter | 0h22m | Flare 1 and 2 | NO | YES | NO | 1.0 pounds |
| Volatile Organic Compounds (VOCs) | 0h22m | Flare 1 and 2 | NO | NO | YES | 1.0 pounds |
| Sulfur Dioxide | 0h22m | Flare 1 and 2 | NO | YES | NO | 3,142.0 pounds |
| Hydrogen Sulfide | 0h22m | Flare 1 and 2 | NO | NO | NO | 8.0 pounds |
Accident Classified As: Reportable Quantity
Cause of Problem: Equipment Failure
The wet gas compressor in the delayed coking unit had malfunctioned.
Discharge Preventable - No Information Given
The incident was not reasonable preventable because the trip solenoids should not be by-passed due to safety concerns.
Notes/Remedial Actions
The maximum hourly permitted emissions for hydrogen sulfide and sulfur dioxide exceeded the maximum hourly permitted emissions. Gas from the coker was combusted in Flare 1 and Flare 2. The resulting combustion byproducts rapidly dispersed. Emissions were minimized by restarting the wet gas compressor. The incident will be communicated to all affected personnel. The XY-53325 A and B solenoids as well as the XY-53325A relay will be replaced during the text outage. Wiring in the compressor control cabinet will be upgraded to separate critical wiring from general purpose wiring.
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