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Accident # | 130963 |
State Police # | 11-02420 |
Accident Date | 2011-04-27 |
Report Date | 2011-05-04 |
Follow-up Date | 2012-01-06 |
Follow-up: | Yes |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Sulfur Dioxide | 1d 13h | No. 2 Coker and Cat Feed Hydrotreater (CFHT) | NO | YES | NO | 1,150.8 pounds |
Accident Classified As:
Unscheduled outages of the No. 2 Coker and Cat Feed Hydrotreater resulted from a temperature change due to operating on combustion air resulted in the release of sulfur dioxide.
According to the Refinery Letter, "the root cause of low acid gas production was the result of an unplanned curtailment and shutdown of upstream units."
RQ. EPA Consent Decree report included. Immediate remedial actions taken: Upstream unit rates were reduced, the Sour Water Stripper unit was shut down, and SRU conditions were adjusted. Further action: 1)Refresher training has been conducted with increased emphasis on the importance of monitoring the No. 1 Converter temperature closely during train transitions to combustion air with pit vapor to prevent recurrence. 2)Procedure to switch from O2-mode to air-mode was modified. 3)MDEA lean loading field testing to be moved to refinery lab, with upgraded analysis procedures 4)Evaluate project to operate SRU units in partial O2-enrichment mode to reduce environmental vulnerability On January 6, 2012 the refinery sent follow-up notification that all action items related to the April 27, 2011 Tail Gas Incident has been completed.
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