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Motiva Enterprises (1406), Norco

Releases of Butylene

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
90100

2006-08-19		West Ops Ground Flare (EPN# 9-84)
Cause: Incident due to an upset at Shell Chemical's GO-1 process unit.

Followup: No

Notes: Letter states that no RQ's were exceeded. Little info given regarding cause and duration.		0
115263

2009-05-27		Cat Cracker debutanizer column
Cause: States that there was a problem with the Cat Cracker Debutanizer column. Propylene, butylene, Benzene, SO2, and H2S were released...there was no cause listed as to how these chemicals were released

Followup: No

Notes: There were no remedial actions listed as to how the problem was corrected with the Cat Cracker and no mention as to how the release of these chemicals were stopped. Verbal report only, no letter from the refinery.
121572

2010-02-17		FLARE - HCU Elevated Flare [EPN4-84], Relief Valve [RV1178 & RV1204]
Cause: Loss of electrical breaker powering most of the large motors in the hydrocracking unit caused two columns to "release to atmosphere;" RV-1178 on the Rectified Absorber Column for 30secs, RV-1204 on the Caustic Water Wash column "momentarily." FLARE.

Followup: Yes

Notes: BRQ. Refinery Follow-up Letter states "final calculations confirm that no reportable quantities were exceeded as a result of this release." Breaker loss discovered & repaired, operations returned to normal.