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Accident # | 130690 |
State Police # | 11-02206 |
Accident Date | 2011-04-21 |
Report Date | 2011-04-25 |
Follow-up Date | 0000-00-00 |
Follow-up: | No |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Sulfur Dioxide | 3h 4m | Sulfur Unit (SRU-4); TGTU No 4 | NO | YES | NO | 1,467.0 pounds |
Accident Classified As: Reportable Quantity
State police report states that an unplanned shutdown occurred due to an upset in the sulfur unit, causing a release in sulfur dioxide. The incident originated with the unit re-start of the Fluid Catalytic Cracking Unit (FCCU) which then affected the processes of the Amine Recovery Unit (ARU).
Motiva's Upset Notification Form states that the incident was a result of lighter than usual (gasoline range) material getting into the process vessels. The lighter material caused the level instrumentation to read incorrectly in a false indication that levels were acceptable.
Operations modified the start-up procedure to better diagnose a buildup of backpressure from downstream.
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