MARATHON PIPE LINE LLC

hazardous_liquid Incident —

Incident Information

Report Date
OperatorMARATHON PIPE LINE LLC
Commodity—
Pipeline Typehazardous_liquid

Location

State
Coordinates39.32368, -87.90034

Cause

CauseEQUIPMENT FAILURE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

Property Damage
Lost Commodity
Public/Private Damage
Emergency Response
Environmental Remediation
Other Costs

Location Map

Incident Narrative

WHILE CONDUCTING THE ANNUAL INSPECTION OF BELOW-GRADE ISOLATION GASKETS ON THE TANK 1283 TANK VALVE, HIGH LEL LEVELS WERE RECEIVED. A SHALLOW HOLE WAS HAND-DUG AROUND THE VALVE, SHOWING A SLIGHT INDICATION OF A RELEASE. THE AREA WAS FURTHER EXCAVATED, CONTAMINATED SOIL WAS REMOVED, AND DIAPERS WERE PLACED UNDER EACH FLANGE AND THE FLANGES/DIAPERS WERE WRAPPED IN PLASTIC. AFTER A 24 HOUR TEST, THE DIAPERS AROUND THE LINE SIDE FLANGE FOR THE TANK VALVE WERE WET FROM PRODUCT. THE NEXT 24 HOURS, THE DIAPERS WERE DRY AROUND THAT SAME FLANGE. INITIAL MEASUREMENTS WERE TAKEN AND THE FLANGE DID NOT SEEM OUT OF ALIGNMENT, HOWEVER, WHEN THE FLANGE WAS BROKEN THE GAP ON THE TOP SIDE OF THE FLANGE WAS .5 INCHES GREATER THAN THE BOTTOM SIDE OF THE FLANGE. THIS RESULTED IN THE GASKET NOT FULLY SEALING AND A 4.13 GALLON RELEASE, BASED OF THE DIAPER AND SOIL CONTAMINATION. THE LINE WAS FURTHER EXCAVATED TO BRING THE FLANGE INTO ALIGNMENT AND ADDITIONAL SUPPORTS WERE PLACED UNDER THE TANK LINE TO PREVENT SETTLEMENT.

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.

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