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Shell Facility (3462), St. Rose

Releases of Volatile Organic Compounds (VOCs)

LDEQ Accident Number
Accident Date
Point Source(s) Notes Amount of Release
No LDEQ Reported

2005-12-15
5-77 (St. Rose Flare)
Cause: A failure of the pilot gas regulator caused the pilot fuel gas pressure to drop below normal. Inclement weather (high winds) then caused to flare pilot to blow out. Reported weather conditions at the time were cloudy with 17mph winds

Followup: No

Notes: The equipment failure was unexpected and thus the discharge was not preventable. Actions were taken to override the regulator and restore the gas flow to the pilot and hence relight the flare pilot. During this time gas flow to the flare was minimized The flare pilot regulator that failed was replaced with a formal investigation to follow to see if further corrective actions are necessary. NOTE: Quantity of material released was calculated using a formula that conservatively assumes the flare is emitting at its average rate just prior to and during the event.
5,048.0 pounds
81720, 81957, 83713

2005-08-28
7-84 (OL-5 Ground Falre, FG-101); 6-84 (OL-5 Elevated Flare, FE-101); 1-90 (GO-1 Elevated Flare, FE602); 3-84 (Utilities East Flare, FE 501)
Cause: Due to shutdown and damages associated with Hurricane Katrina

Followup:

Notes: The most significnt point source emissions were from the Elevated flare. The report does not include emissions from tanks, HCU Flare, Emergency Bypass Outfall and other equipment that was previously reported.
525,566.0 pounds
No LDEQ Reported

2006-07-24
St. Rose Flare
Cause: Unexpected failure of Entergy power supply resulting in flaring material from the crude column overhead system

Followup: No

Notes: Improvements to power supply are current project
11.2 pounds
No LDEQ Reported

2006-07-02
St. Rose Flare
Cause: Electrical power dip which led to a pump shutdown and causing the de-salter to overpressure resulting in a pressure relief valve opening up and material vented to the flare

Followup: No

Notes: Pump restarted. Improvements to power supply are current project
6.5 pounds
No LDEQ Reported

2006-06-24
St. Rose Flare
Cause: Unexpected failure of the Entergy power supply which resulted in the shutdown of the K-8508 compressor. When the compressor shut down, material was automaticallydiverted to flare

Followup: No

Notes: Unit was depressured until the power was restored. Improvement in the St. Rose electrical supply are subject of a current project.
0.1 pounds
No LDEQ Reported

2006-04-21
St. Rose Flare
Cause: The flare pilot was extinguished by a strong thunderstorm

Followup: No

Notes: Due to unexpecte equipment failure. The pilot was designed to withstand inclement weather conditions.An investigation will be conducted on the flare tip & pilot to understand why it went out. St. Rose flare is 200 feet tall.
63.0 pounds
No LDEQ Reported

2006-02-12
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.
8.0 pounds
No LDEQ Reported

2007-09-24
5-77 (St. Rose Flare)
Cause: Power failure allowed two pressure relief valves to open to the flare to prevent over-pressuring of the unit

Followup: No

Notes: The power failure was unexpected. They secured the process unit until the power was restored. Electrical support will work with the energy supplier to understand what caused the failure and take appropriate corrective action to prevent reoccurence. Word for word what happened the prior month
5,077.0 pounds
98868

2007-08-23

EPN 5-77 St. Rose Flare
Cause: Power failure allowed two pressure relief valves to open to the flare to prevent over-pressuring of the unit

Followup: No

Notes: The power failure was unexpected. They secured the process unit until the power was restored. Electrical support will work with the energy supplier to understand what caused the failure and take appropriate corrective action to prevent it from reoccurring.
78.0 pounds
98478

2007-06-03
5-77 St. Rose Flare
Tank TK-8552
Tank TK-8553
Cause: During a crude tank switch there was a unit upset when water and emulsion from a feed tank was introduced into the process, leading to the over pressuring of a de-salter vessel to the flare, a spill of water and emulsion to the water treatment facility and the shutdown of the compressor with additional flaring. During this unit upset tanks TK-8552 and TK-8553 roof legs inadvertently landed on the floor

Followup: No

Notes: Initial written report issued 6/20/07 but investigation revealed additional vent streams were routed to the flare so the numbers were updated on 8/14/07. To prevent this the water in the crude oil tank should have been drained prior to being placed in service. The crude tank was switched back to prevent further water and emulsion from being fed into the unit. Necessary steps were taken to clean up the wastewater treatment facility & return unit to normal. Tanks TK-8552 and TK-8553 were refilled to their normal levels. In the future, the water in the crude tank will be drained before the tank is placed into service
5,686.0 pounds
No LDEQ Reported

2008-09-20
5-77 (St. Rose Flare)
Cause: Loss of steam pressure when a tube failed in the boiler resulting in flaring

Followup: No

Notes: The boiler tube failure could not be predicted. Shut the process unit down until boiler repairs could be completed. The incident will be investigated and appropriate corrective actions will be implemented to prevent reoccurrence
386.0 pounds
No LDEQ Reported

2008-08-25
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
229.2 pounds
No LDEQ Reported

2008-07-17
5-77 (St. Rose Flare)
Cause: A bearing failed on the vent gas compressor for the vacuum unit.

Followup: No

Notes: The bearing failure was not predictiable. The compressor was shut down and a valve to the St. Rose flare was opened to lower and control the seal drum pressure. The compressor was replaced with a spare and the unit was returned to normal operating conditions. The spare will be replaced with the repaired compressor during the next unit outage
4.7 pounds
No LDEQ Reported

2008-04-13
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
16.9 pounds
No LDEQ Reported

2008-04-08
5-77 (St. Rose Flare)
Cause: Maintenance activities on the uninterruptible power supply (UPS) led to an interuption in power due to a loose connection in the UPS. Several pieces of equipment shut down and there was flaring

Followup: No

Notes: The incident occurred during routine maintenance activity on the UPS and the loose connection in the UPS was not expected. The equipment was restarted once power was returned. The incident will be investigated and corrective actions will be implemented appropriately to prevent reoccurence
12.6 pounds
No LDEQ Reported

2008-01-03
5-77 (St. Rose Flare)
Cause: Power failure lead to unit shutdown, resulting in a unit upset and flaring

Followup: No

Notes: Power failure was caused by Entergy and was unplanned. All heavy product lines were flushed with a diesel driven flush pump. Incident will be reviewed with Entergy to discuss what happened and what can be done to prevent recurrence.
40.0 pounds
151683

2013-10-17
tank 8553
Cause: On October 16, 2013 at 1600 hours, the St. Rose operators discovered that a naphtha tank, Tank 8553, transferring naphtha landed on the roof legs. The radar gauge that was being used to monitor the level was believed to have been reading incorrectly; approximately 3 feet higher than the level should have been reading.

Followup: Yes

Notes: Once the operators discovered that the tank landed on the roof legs, the transfer from Tank 8533 was immediately stopped, and product was allowed to gravitate back into the tank until the roof was floated off the legs. Currently, an investigation is occurring. The results from this investigation will be incorporated, where applicable, to prevent recurrence.
1,270.8 pounds