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Shell Facility (3462), St. Rose

Causal Factor: Other

LDEQ Accident Number
Accident Date
Point Source(s) Notes Amount of Release

GO-1 Elevated Flare
Cause: In order to control the differential pressure, untreated dry gas was sent to the fuel gas system and the remaining amount was flared.

Followup: No

Notes: Incident involving the DEA treatment system is the subject of an ongoing investigation. Corrective actions will be implemented.
Carbon Monoxide: 22.0 pounds
Hexane: 3.0 pounds
Nitrogen Dioxide: 37.0 pounds
Particulate Matter: 7.0 pounds
Sulfur Dioxide: 1,587.0 pounds
Volatile Organic Compounds: 8.0 pounds

5-77 (St. Rose Flare)
Cause: Lost power to controls for crude column overhead fans and Uninterruptable Power Supply backup ran out of batteries. Fans shut down leading to necessity of shutdown of the unit and flaring

Followup: No

Notes: The process unit was stablized until an electrician could resote control power to the fans. Once power was restored the equipment was restarted and the unit safely returned to normal conditions. The incident will be investigated and any appropriate corrective actions will be implemented to prevent reoccurrence. Report said it was preventable but did not say why or how. The cover letter/narrative (referencing the verbal notification) mentioned that naphtha and smoke were released, but these were not mentioned elsewhere in the report
Benzene: 1.9 pounds
Carbon Monoxide: 339.4 pounds
Nitrogen Oxide: 62.4 pounds
Particulate Matter: 11.7 pounds
Sulfur Dioxide: 11.9 pounds
Toluene: 3.7 pounds
Volatile Organic Compounds: 229.2 pounds
Xylene: 5.0 pounds
n-Hexane: 4.6 pounds

5-77 (St. Rose Flare)
Cause: Power interruption caused by fire at Entergy substation feeding the plant. Lead to shutdown of plant and flaring.

Followup: No

Notes: The power interruption from Entergy was not foreseeable and the equipment was restarted once power was returned. The incident will be reviewed with Entergy and any appropriate corrective actions will be implemented to prevent reoccurrence
Benzene: 0.1 pounds
Carbon Monoxide: 113.0 pounds

Nitrogen Oxide: 20.8 pounds
Particulate Matter: 3.9 pounds
Sulfur Dioxide: 1.0 pounds
Toluene: 0.0 pounds
Volatile Organic Compounds: 16.9 pounds
Xylene: 0.0 pounds
n-Hexane: 1.1 pounds