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MEDALLION OPERATING COMPANY, LLC

hazardous_liquid Incident —

Incident Information

Report Date—
OperatorMEDALLION OPERATING COMPANY, LLC
Commodity—
Pipeline Typehazardous_liquid

Location

State
Coordinates31.35956, -101.51221

Cause

CauseNATURAL FORCE DAMAGE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

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

Location Map

Incident Narrative

DURING FEBRUARY'S SEVERE WINTER STORMS, MEDALLION IMPLEMENTED ON-SITE VISUAL INSPECTIONS OF STATIONS EFFECTED BY THE STATEWIDE ELECTRICAL BLACKOUTS AND INCREASED AERIAL PATROL TO ENSURE PIPELINE INTEGRITY. ON TUESDAY, FEBRUARY 16TH AT 14:24, DURING AN ON-SITE VISUAL INSPECTION, LOCAL OPERATIONS PERSONNEL DISCOVERED A RELEASE OF CRUDE OIL. THE SANTA RITA STATION WAS SHUT IN PRIOR TO THE DISCOVERY OF THE RELEASE DUE TO THE IMPACT OF THE WINTER STORM ON STATEWIDE ELECTRICAL DELIVERY. THE SANTA RITA STATION LOST POWER IN THE EARLY MORNING HOURS ON FEB. 15 AND CONTINUED TO BE WITHOUT POWER UNTIL FEB 19. THE SANTA RITA STATION WAS OBSERVED BY MEDALLION'S CONTROL CENTER UNTIL COMMUNICATION WITH THE STATION WAS LOST DUE TO THE DEPLETION OF ITS BACKUP POWER SOURCE. MEDALLION THEN INITIATED ON-SITE VISUAL STATION INSPECTIONS. THE FIRST STATION CHECK OCCURRED ON FEB. 15TH AT 10:30 AND NO RELEASE WAS OBSERVED. DURING A SUBSEQUENT STATION CHECK ON FEB. 16TH AT 14:20, THE RELEASE WAS OBSERVED AND WAS REPORTED INTERNALLY. ADDITIONAL OPERATIONS PERSONNEL ARRIVED AT 15:10 ON FEB 16 AND CONFIRMED THE RELEASE AS A REPORTABLE ACCIDENT. THE RELEASE WAS NOT ACTIVE AT THE TIME OF DISCOVERY. CRUDE OIL WAS OBSERVED INSIDE THE CONCRETE CONTAINMENT SKID THAT HOUSED PUMP 9620. AN INVESTIGATION FOUND THE RELEASE OCCURRED AT A FLANGED CONNECTION BETWEEN THE BARREL OF PUMP 9620 AND THE CONNECTING DISCHARGE PIPING. IT IS BELIEVED THAT THE SEVERE COLD TEMPERATURE IN COMBINATION WITH A LACK OF FLOW IN THE STATION, DUE TO DISRUPTED ELECTRICAL POWER DELIVERY, RESULTED IN CONTRACTION OF THE GASKET MATERIAL AND OR THE CONNECTING PIPING. TO PREVENT RECURRENCE, MEDALLION REMOVED AND REPLACED THE GASKET, AND RETORQUED THE FLANGED CONNECTION ON FEB. 16, IN PREPARATION FOR RETURN-TO-SERVICE WHEN POWER WAS RESTORED. THE RELEASE TOTALED 2.2 BARRELS OF CRUDE OIL TO THE PUMP CONTAINMENT AND ADJACENT SOIL. OPERATIONS PERSONNEL RECOVERED ALL OF THE 2.2 BARRELS BY REMEDIATION OF THE AFFECTED SOIL AND THE REMOVAL OF STANDING CRUDE OIL FROM THE PUMP SKID CONTAINMENT ON FEB. 20TH.

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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