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Marathon Ashland Petroleum (3165), Garyville

LDEQ Accident Report

Accident #No LDEQ Number Available
PDF AvailablePDF
State Police #13-01306
Accident Date2013-07-24
Report Date 2013-07-29
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
Sulfur Dioxide60 MUnit 250 North Ground FlareNOYESNO613.0 pounds
Ethane60 MUnit 250 North Ground FlareNONOYES6.2 pounds
Ethylene60 MUnit 250 North Ground FlareNONOYES0.1 pounds
Propane60 MUnit 250 North Ground FlareNONOYES58.3 pounds
n-Butane60 MUnit 250 North Ground FlareNONONO123.1 pounds
Isobutane60 MUnit 250 North Ground FlareNONOYES65.7 pounds
1-Butene60 MUnit 250 North Ground FlareNONOYES0.4 pounds
Pentene Plus60 MUnit 250 North Ground FlareNONONO101.2 pounds
Hydrogen Sulfide60 MUnit 250 North Ground FlareNONONO6.7 pounds
NOx60 MUnit 250 North Ground FlareNONOYES25.2 pounds
Carbon Monoxide60 MUnit 250 North Ground FlareNOYESNO137.3 pounds
Volatile Organic Compounds (VOCs)60 MUnit 250 North Ground FlareNONOYES350.2 pounds
Particulate Matter 1060 MUnit 250 North Ground FlareNOYESNO2.8 pounds
Particulate Matter 2.560 MUnit 250 North Ground FlareNOYESNO2.8 pounds
Highly Reactive Volatile Organic Compounds (HRVOCs)60 MUnit 250 North Ground FlareNONONO0.3 pounds
Carbon Dioxide60 MUnit 250 North Ground FlareYESNONO370.7 pounds
Methane60 MUnit 250 North Ground FlareYESNOYES2.5 pounds
Nitrous Oxide60 MUnit 250 North Ground FlareYESYESYES0.5 pounds
Propylene60 MUnit 250 North Ground FlareNONOYES0.2 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Process Upset

On July 24, 2013, the Unit 210 Crude Overhead Compressor shut down at 16:11 hours and was restarted at 16:26 hours. A second shutdown occurred at 16:48 hours and was restarted at 17:02 hours. A third shutdown occurred at 17:25 hours and was re-started at 17:56 hours. The duration of Unit 210 venting to the North Ground Flare was 60 minutes. Approximately 613 pounds of sulfur dioxide were released (over the reportable quantity of 500 pounds).

Discharge Preventable - Under Investigation

The results of the Root Cause Analysis will determine whether or not the event was preventable. A very similar event on March 25, 2013 (LDEQ 147603) was labeled as preventable.

Notes/Remedial Actions

Liquid was drained from the Unit 210 Compressor Suction Drum. The Unit 210 Crude Overhead Compressor was re-started. A very similar event occurred on March 25, 2013 with emissions from the same point source. This report retrieved from EDMS was labeled with the LDEQ number corresponding to the March 25, 2013 incident (LDEQ # 147603). The March 25th event also involved multiple shutdowns of the Unit 210 Crude Overhead Compressor, and the report labeled that event as preventable. It is interesting to note that a similar event labeled preventable occurred less than four months later.