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Phillips 66 (2418), Belle Chasse

Causal Factor: Maintenance/Procedures

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

308F-D-2 High Pressure Flare
Cause: The HF Acid Rerun Tower in the HF Alkylation Unit was being taken out of service to replace fouled packing. The normal procedure for preparing this equipment for maintenance includes a flush with isobutane to the High Pressure FLare

Followup: No

Notes: An attempt was made to reduce the flare flow but it was not sufficient enough. Further occurrence of this maintenance activity will be planned in a manner to allow a variance request to be submitted prior to the event. For a linger term solution, the flare permit will be modified to add this specific maintenance activity.
Nitrogen Oxide: 36.7 pounds

301-D-3 FCC Regenerator Flue Gas Bypass Stack
Cause: A portion of the process control system for the Fluidized Catalytic Cracking Unit was taken offline to perform software maintenance. At the time of reactivation, the control system malfunctioned causing the High Integrity Pressure Protection System to activate and shut down the FCC Unit via computer software control. During shutdown, the FCC regernator flue gas is diverted to the bypass stack.

Followup: No

Notes: The FCC Unit was brought into safe condition and to allow evaluation of the control system before re-commissioning the unit.
Carbon Monoxide: 21,192.0 pounds

Cause: The Propane Pilpeline Pump was secured, bled down and isolated for maintenance. Personnel then reported a leak on the suction flange. To isolate the leak a 300 foot section of 10' diameter piping had to be de-pressured by venting liquid propane in the section to the atmosphere. There is no access to the flare system in this area of the tank field.

Followup: No

Notes: A plan was developed and executed to safely de-pressure the line and install a blind to isolate the leak.
Propane: 19,397.0 

Thermal Hydrodealkylation Unit (1792)

Followup: Yes

Notes: Planned shutdown occurred to repair problms with the Thermal Hydrodealkylation Unit. Courtesy Call. Verbal report was made but no written report followed.


Fluid Catalytic Cracker (FCC) Unit

Followup: Yes

Notes: Discovered a leak in the slurry recycle pump and had to shut the FCC down to repair it. Verbal report was made but no written report followed.


Fluid Catalytic Cracker (FCC) Unit

Followup: No Information Given

Notes: Courtesy call to warn of potential smoke.

No Information Given

Dock 1- Light oil manifold

Followup: No

Notes: Spill occurred during regular coast guard pressure test, small oil release. Booms and pads deployed to absorb and contain sheen.


Cause: ConocoPhillips notified LDEQ that the facility would be running at a reduced rate that would result in venting of the FCC Unit Regenerator and potential intermittent flaring.

Followup: Yes

Notes: RQ not exceeded. No offsite impact reported.


308F-D-1 (low pressure flare) and various process heaters
Cause: During maintenance activities, "amine stripper vessel experienced unexpected level swings" and "SRU (sulfur recovery unit) waste heat boiler unexpectedly tripped offline due to its flame scanner no longer detecting a flame at the burner. Several attempts that were made to re-light the burner were unsuccessful due to igniter malfunction" -- had to flare excess.

Followup: No

Notes: "Routed acid gas feed stream to the LP flare and immediately implemented the sulfur shedding plan...root cause investigation has been initiated." Detailed refinery letter only in this file. No LDEQ Report.
Sulfur Dioxide: 26,236.0 pounds
Hydrogen Sulfide: 76.0 pounds
Nitrogen Oxide: 7.0 pounds
Volatile Organic Compounds (VOCs): 70.0 pounds

SRU incinerator
Cause: Emissions due to scheduled maintenance on Tail Gas Treater.

Followup: No

Notes: "The FCC (fluid catalytic cracking) unit was taken offline prior to the TGT shutting down in a controlled manner."
Sulfur Dioxide: 146,565.0 pounds

low pressure flare
Cause: Controlled flaring for inspection and maintenance--remaining gases from the Fluidized Catalytic Cracking Unit's recovery section routed to the Low Pressure Flare while shutting down several refinery units

Followup: No

Notes: none--planned flaring
Sulfur Dioxide: 81.0 pounds

benzene line leak (412-FF)
Cause: leak developed at a pipe rack support beam for the benzene dock line during annual pressure test procedure--10 gal/59lbs spilled--reportable quantity exceeded

Followup: No

Notes: RQ. Two gallons recovered by vacuum truck, eight evaporated, air monitoring at perimeter
Benzene: 59.0 pounds

low pressure flare (308F-D-1)
Cause: Coker compressor went into recycle mode during shutdown for scheduled maintenance. Suction drum pressure increased causing flare valve to open. Stream diverted to Low Pressure Flare.

Followup: No

Notes: flare valve closed upon complete shutdown of the compressor; monitoring at refinery perimeter
Sulfur Dioxide: 218.0 pounds