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CITGO Petroleum (1250), Lake Charles

LDEQ Accident Report

Accident #135306
State Police #11-07165
Accident Date2011-11-16
Report Date 2011-11-22
Follow-up Date 0000-00-00
Follow-up: No

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Xylene12 h 15 mVessel, Valve on Marpol LineNONONO1,000.0 pounds
Carbon Monoxide12 h 15 mVessel, Valve on Marpol LineNOYESNO 
Hydrogen Sulfide12 h 15 mVessel, Valve on Marpol LineNONONO 

Accident Classified As: Reportable Quantity

Cause of Problem: Seal or Gasket

LDEQ responded to the incident at Citgo Petroleum D Dock, where the marine vessel Chembulk New Orleans appeared to have started leaking xylene after loading approximately 22,000 bbls onto the vessel. The discharge appeared to be coming from under the bottom of the vessel under a slop tank storage compartment. It was creating a light sheen and a strong odor in the area of the discharge along the dock area, so hard booms were deployed around the vessel by Citgo and ES&H. Slop tank was pumped into another compartment that appeared to slow the leak. Vessel personnel stated that the vessel was double hulled and the xylene was not coming from the vessel. Citgo personnel considered sending a diver on 11/17/11 to assess the discharge area under the vessel. Kevin Natali was notified by Citgo on 11/17/11 that 4 valves on the Marpol line (which discharges overboard) on board the vessel was found to be leaking. The leaks was secured at approximately 4 am on 11/17/11 and it was determined that a diver was not needed.

Discharge Preventable - No Information Given

No Information Given.

Notes/Remedial Actions

Vessel was inspected by the US Coast Guard before it was released. Incident linked to #135315. Multi Gas Monitor Report included with readings from across the river during the accident. VOC levels fluctuated between 1 and 9 ppm. Readings also show low levels of carbon monoxide and sulfur dioxide. Citgo initially claimed the leak was not coming from the vessel. Later, leak found on board the vessel. VOC had a conversion factor of 0.4, this may mean that values were reduced to 400lbs but the closed report states 1000 lbs.