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LDEQ Accident Number Accident Date |
Point Source/Release | Cause | Notes |
101968 2007-12-29 | Point Source(s): Unit 34 thermal oxidizer Unit 34 termal oxidizer Pollutant(s):Hydrogen Sulfide - BRQ Sulfur Dioxide - BRQ | Cause of Problem: Equipment Design The Amine Unit 47 shutdown when amine circulation was lost because of a control valve failing to close. | The shutdown of Unit 45 Sulfur Recover unit reduced the acid gas (hydrogen sulfide-H2S) processing capacity by 1/3. To reduce the acid gas Marathon implemented "sulfur shedding procedures", involving reducing feed desulfurization units and the Coker . A manual bypass valve was opened to restore circulation. Sulfur dioxide limit (250 ppm) on Unit 34 thermal oxidizer and hydrogen sulfide limit 160ppm on the fuel gas system were exceeded. |
100086 2007-10-10 | Point Source(s): Pollutant(s):Hydrogen Sulfide - 0 | Cause of Problem: Process Upset The packing in a lean amine bypass control valve blew out releasing amine and sour hydrogen gas to the atmosphere. To repair the valve the unit required depressurizing to the south flare | A high level incident investigation is underway |
99754 2007-09-26 | Point Source(s): South Flare Pollutant(s):Sulfur Dioxide - 1 pounds Olefins - 2 pounds | Cause of Problem: Process Upset Shell off gas compressors had to shutdown and gas was put into the fuel gas system. Fuel gas system overpressured and relieved to flare. | Claims emission was below RQ. |
98913A 2007-08-24 | Point Source(s): North Flare; weep holes on the HF Acid Shelter relief valve and the Main Fractionator Bottom relief valve Pollutant(s):Hydrocarbon - 794 pounds Olefins - 19 pounds Hydrogen Flouride - 0 pounds Nitrogen Oxide - 277 pounds | Cause of Problem: Equipment Failure Unit 27 substation failed and shut down HF Alkylation, Butamer and Amine Treating. Failure of the bellows in Unit 27 Main Fractionator Bottoms relief valve | Claims emission was below RQ. |
98913 2007-08-24 | Point Source(s): North Flare; weep holes on the HF Acid Shelter relief valve and the Main Fractionator Bottom relief valve Pollutant(s):Hydrocarbon - 794 pounds Olefins - 19 pounds Hydrogen Flouride - 0 pounds Nitrogen Oxide - 277 pounds | Cause of Problem: Equipment Failure Unit 27 substation failed and shut down HF Alkylation, Butamer and Amine Treating. Failure of the bellows in Unit 27 Main Fractionator Bottoms relief valve | Claims emission was below RQ. |
98775 2007-08-18 | Point Source(s): North Flare Pollutant(s):Sulfur Dioxide - 199 pounds Nitrogen Oxide - 10 Volatile Organic Compounds - 0 | Cause of Problem: Process Upset The Crude Overhead Compressor overpressured and was relieved to the North Flare | Claims emission was below RQ. Installing pressure indicators on the first stages of both overhead compressors which will be routed to the control room for iproved monitoring. |
98486 2007-08-08 | Point Source(s): Heavy Vacuum Gas Oil Pumparound Pump Pollutant(s):Heavy Vacuum Gas Oil - BRQ | Cause of Problem: Seal or Gasket HVGO Pumparound Pump had a seal failure and leaked oil to the pump pad which goes to the oily water sewer. | Claims emission was below RQ. Pump will be taken out of service to replace the pump seal. |
98487 2007-08-07 | Point Source(s): FCCO Cooling Tower and the North Flare Pollutant(s):Highly Reactive Volatile Organic Compounds (HRVOCs) - 81 pounds Volatile Organic Compounds (VOCs) - 310 pounds Hydrogen Sulfide - 4 pounds Carbon Monoxide - 0 pounds Sulfur Dioxide - 7 pounds | Cause of Problem: Equipment Failure The PGC Aftercooler trim cooler was found leaking hydrocarbons into the FCCO cooling tower. | Claims emission was below RQ. |
No LDEQ Number Available 2007-07-31 | Point Source(s): Coker conveyor belt west of refinery Pollutant(s):No Information Given - 0 | Cause of Problem: No Information Given Friction from a failed roller-bearing caused fire at the coker conveyor belt | Claims emission was below RQ. |
No LDEQ Number Available 2007-07-31 | Point Source(s): Coker conveyor belt west of refinery Pollutant(s):No Information Given - BRQ | Cause of Problem: No Information Given Friction from a failed roller-bearing caused fire at the coker conveyor belt | Claims emission was below RQ. |
97250 2007-06-20 | Point Source(s): Leaking flange downstream of control valve on the fractionator reflux line in the HF Alkylation Unit Pollutant(s):Hydrogen Flouride - 1 pounds Propane - 4 pounds Isobutane - 19 pounds n-Butane - 3 pounds Pentane - 0 pounds | Cause of Problem: Piping or Tubing Flange leak | Claims emission was below RQ. |
96834 2007-06-06 | Point Source(s): Three pinhole leaks in the Unit 28 Butane Isomerization Regen line and North Flare Pollutant(s):Butane - 978 pounds | Cause of Problem: Piping or Tubing same leak that was clamped earlier in the year | Claims emission was below RQ. |
96829 2007-06-06 | Point Source(s): Truck near Marathon Avenue and Hwy 61 Pollutant(s):Asphalt - 2 gallons | Cause of Problem: Human Factors Upon leaving asphalt terminal driver noticed that the top hatch of his tank truck was not properly secured. | Claims emission was below RQ. |
96604 2007-05-30 | Point Source(s): Dock 1 Pollutant(s):Oil - 2 pounds | Cause of Problem: Piping or Tubing The oily water sewer sump backed up due to the ballast water line eing out of service for maintenance. Release into Mississippi | Claims emission was below reportable quantities. Containment boom was in place already under the dock due to previous problem with the ballast water line. |
96496 2007-05-23 | Point Source(s): North Flare Pollutant(s):Volatile Organic Compounds - 82 pounds | Cause of Problem: Process Upset HS Alkylation Unit Depropanizer bottoms relief valve opened. Failure of 3 way valve. | Claims emission was below RQ. Emission contained iso butane and propane. A design and engineering package has been approved for a pressure indication device upstream of the three way control valve to be installed in 2008. 80 |
96397 2007-05-18 | Point Source(s): North Flare Pollutant(s):Volatile Organic Compounds - 142 pounds | Cause of Problem: Piping or Tubing Alky Butane Splitter/Chill Water Condesnser had a tube leak. | Claims emission was below RQ. Emission contained iso butane and propane. |
96056 2007-05-09 | Point Source(s): Crude ship MT Fortius moored at Marathon's Dock 1 Pollutant(s):Low sulfur diesel - 78 gallons | Cause of Problem: Piping or Tubing The crude ship is believed to have been venting at the time of the release | MPC requested a copy of the shp's inert gas pressure system readings for the cargo tanks and the request was refused by the ship's representative. DEQ's field interview form for this incident tells a different story - it was a leak in the Ballast Water Line. |
95890A 2007-05-03 | Point Source(s): abandoned pipe in Tank Farm Pollutant(s):Oil - 70 gallons | Cause of Problem: Piping or Tubing Abandoned pipe that was once used for circulating crude oil. | Severe weather for 2 days delayed clean up efforts. |
95890 2007-05-03 | Point Source(s): abandoned pipe in Tank Farm Pollutant(s):Oil - 70 gallons | Cause of Problem: Piping or Tubing Abandoned pipe that was once used for circulating crude oil. | Severe weather for 2 days delayed clean up efforts. |
95719 2007-04-27 | Point Source(s): Ballast Water Line at Dock 1 Pollutant(s):Process Water - 9 pounds | Cause of Problem: Piping or Tubing Untreated process water in the line is routed back to the refinery for treatment at the wastewater treatment plant. Leak allowed discharge into the Mississippi River | Claims emission was below RQ. Analysis results of water sample showed 7ppm total suspended solids; 26.3 ppm oil and grease; 164.4 ppm Total Organic Carbon and 26,100 ug/l of BTEX |
95665 2007-04-26 | Point Source(s): North Flare Pollutant(s):Sulfur Dioxide - 40 pounds Hydrocarbon - 15 pounds | Cause of Problem: No Information Given Fuse was blown causing FCCU to shut down | Claims emission was below RQ. Hydrocarbon contains 9 pounds of highly reactive hydrocarbons. |
95653 2007-04-25 | Point Source(s): North Flare Pollutant(s):Sulfur Dioxide - 76 pounds | Cause of Problem: Process Upset Scheduled drum swap caused Drum 1 to pressure up. The relief valve on the Fractionator Overhead line relieved to the flare. | Claims emission was below RQ. |
95029A 2007-03-30 | Point Source(s): South Flare Pollutant(s):Sulfur Dioxide - 5 pounds | Cause of Problem: Power Failure Electrical failure caused change in valve position to emergency "dump" on the Gas Oil Hydrotreating unit. | Claims emission was below RQ. |
95029 2007-03-30 | Point Source(s): South Flare Pollutant(s):Sulfur Dioxide - 5 pounds | Cause of Problem: Power Failure Electrical failure caused change in valve position to emergency "dump" on the Gas Oil Hydrotreating unit. | Claims emission was below RQ. |
94921 2007-03-26 | Point Source(s): Dock 4 floating barge Pollutant(s):Dock Ballast Water - 100 gallons | Cause of Problem: Human Factors A tug boat was moving barges from Dock 3 and accidentally ran into the Dock 4 floating barge. Operators noticed Dock 4 was listing backward and small holes were discoverved near the water line. | The ballast water contains small concentration of corrosion inhibitor. The inhibitor contained dilute concentrations of sodium nitrate and sodium hydroxide. Estimated amount spilled reported by refinery is between 42 and 420 gallons. LDEQ reported 100 gallons spilled. The total amount of inhibitor originally contained in the ballast water was less than 14 lbs. = 4 lbs sodium nitrate, 0.14 lbs sodium hydroxide. After 7 years these compounds would most likely be inert. |
94388 2007-03-06 | Point Source(s): South Flare Pollutant(s):Sulfur Dioxide - 0 pounds Hydrogen Sulfide - 0 pounds | Cause of Problem: Maintenance/Procedures Compressors in Unit 22 Sturates Gas Plant shutdown for maintenance and gas feed to Unit decreased. As a result temperature of gas feed cooler effluent decreased in turn increasing amount condensed. | Claims emission was below RQ. Claims alternative (shutting down the compressor and a subsequent Unit shutdown) would have allowed for a more substantial release of emissions to the environment. |
No LDEQ Number Available 2007-02-27 | Point Source(s): Marine Dock 1 Pollutant(s):Benzene - 0 pounds Highly Reactive Volatile Organic Compounds (HRVOCs) - 4 pounds Volatile Organic Compounds (VOCs) - 440 pounds Compressed Flammable Gas - 2,036 pounds | Cause of Problem: Human Factors The piping on a newly installed liquid separation vessel was incorrectly piped | Root Cause Analysis is being performed. DEQ Field Interview Report states that the facility failed to have control device in place to ensure that the newly installed piping was correctly piped prior to loading. |
94400 2007-02-27 | Point Source(s): Marine Dock 1 Pollutant(s):Benzene - 0 pounds Highly Reactive Volatile Organic Compounds (HRVOCs) - 4 pounds Volatile Organic Compounds (VOCs) - 440 pounds Compressed Flammable Gas - 2,036 pounds | Cause of Problem: Human Factors The piping on a newly installed liquid separation vessel was incorrectly piped | Root Cause Analysis is being performed. DEQ Field Interview Report states that the facility failed to have control device in place to ensure that the newly installed piping was correctly piped prior to loading. |
93979 2007-02-14 | Point Source(s): North Flare and Heater/Boiler CAP Pollutant(s):Sulfur Dioxide - 716 pounds Volatile Organic Compounds (VOCs) - 35 pounds | Cause of Problem: Equipment Failure Recycle compressors shutdown in the Gasoline Desulfurization Unit | Stopped hydrocarbon carryover to Amine Scrubber which reduced pressure in the Amine Flash Drum. |
93924 2007-02-12 | Point Source(s): South Flare Pollutant(s):Sulfur Dioxide - 11 pounds | Cause of Problem: Equipment Failure Two steam boilers shutdown unexpectedly causing steam pressure facility wide to drop. The Crude Unit experienced an upset due to the loss of steam pressure and flared off of the Splitter Overhead receiver. | No Information Given. DEQ claims emission was below RQ. |
93826 2007-02-08 | Point Source(s): Gas Oil Hydrotreating Unit Pollutant(s):Sulfur Dioxide - 62 pounds Compressed Flammable Gas - 834 pounds | Cause of Problem: Piping or Tubing While the unit was starting up, a crack was noticed. Cause of crack is under investigation. | Claims emission was below RQ. No Information Given |
90321 2007-01-03 | Point Source(s): North Flare Pollutant(s):Hydrogen Sulfide - BRQ Hydrocarbon - BRQ | Cause of Problem: Equipment Failure | Claims emission was below RQ. No Information Given |
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