MARATHON PIPE LINE LLC
hazardous_liquid Incident —
Incident Information
| Report Date | — |
| Operator | MARATHON PIPE LINE LLC |
| Commodity | — |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 30.01410, -90.85554 |
Cause
| Cause | INCORRECT OPERATION |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
ON FEBRUARY 24, 2017 A CONTRACTOR PERFORMING AN ATMOSPHERIC CORROSION ASSESSMENT DISCOVERED CRUDE OIL ON TOP OF THE FLOATING ROOF OF TANK 512. UPON DISCOVERY, THE TANK WAS IMMEDIATELY ISOLATED. UPON INVESTIGATION, THE CRUDE WAS EXPELLED ONTO THE ROOF FOLLOWING MAINTENANCE ACTIVITIES, WHICH ALLOWED AIR TO BECOME TRAPPED IN THE TANK LINE AND THEN LATER ESCAPE THE ROOF SEAL. AT THE TIME OF THE RELEASE, THE ROOF DRAIN VALVE WAS OPEN PER PROCEDURE. THIS RESULTED IN THE RELEASE OF NINE GALLONS OF CRUDE FROM THE TANK ROOF TO THE TANK DIKE THROUGH THE OPEN ROOF DRAIN. ALL PRODUCT WAS CONTAINED WITHIN THE TANK DIKE AND WAS PROMPTLY CLEANED UP. AS A RESULT OF THE INVESTIGATION, IT WAS DETERMINED THE PROCEDURE WAS CORRECTLY FOLLOWED AS WRITTEN BUT EQUIPMENT DESIGN DID NOT ALLOW FOR DEVELOPMENT OF AN OPTIMAL PROCEDURE FOR AIR REMOVAL FROM THE PIPING. 2/2/18 UPDATE: PART G - CHANGED APPARENT CAUSE TO INCORRECT OPERATIONS. PART H - ADDED ADDITIONAL LANGUAGE TO THE NARRATIVE ABOVE.
About This Pipeline Incident
Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.