CENTURION PIPELINE L.P.

Incident Narrative

ON MARCH 9, 2020, AT 6:45AM, A CENTURION PIPELINE L.P. (CPL) EMPLOYEE DISCOVERED A LEAK FROM TANK- ASSOCIATED PIPING WITHIN THE BOUNDARIES OF CPL'S CRANE STATION. APPROXIMATELY 230 BARRELS OF OIL WERE RELEASED, ALL ON COMPANY OWNED AND CONTROLLED PROPERTY, 218 BARRELS OF WHICH WERE RECOVERED IN LIQUID FORM. THE REMAINDER WAS ADDRESSED THROUGH SOIL REMEDIATION AND NO NEGATIVE ENVIRONMENTAL CONDITIONS REMAIN. NO INJURIES OR FATALITIES OCCURRED. CPL DETERMINED, THROUGH A ROOT CAUSE ANALYSIS, THAT THE APPARENT FAILURE CAUSE IS INTERNAL CORROSION DUE TO MICROBIOLOGICALLY INDUCED CORROSION (MIC). CPL IDENTIFIED LOCALIZED PITTING AND DETERMINED THE PIT MORPHOLOGY IS INDICATIVE OF MIC. AS BACKGROUND, THE FAILED PIPE IS ABOVEGROUND PIPING ASSOCIATED WITH A TANK IN THE CRANE STATION. ALL BELOW GROUND STATION PIPING HAS ACTIVE CATHODIC PROTECTION (CP); THE ASSOCIATED TANK ALSO HAS ACTIVE CP, ALTHOUGH THE SYSTEM IS SEPARATE FROM THE BELOWGROUND PIPING SYSTEM. THE FAILED ABOVEGROUND PIPE SEGMENT DID NOT HAVE ACTIVE CP SINCE CP IS NOT POSSIBLE IN THIS CONFIGURATION. HOWEVER, ALL OIL IN THIS SYSTEM, INCLUDING THE FAILED SEGMENT, IS TREATED WITH CORROSION INHIBITOR. FURTHER, BIOCIDE IS ADDED TO THE OIL WITHIN THE ASSOCIATED TANK. IN RESPONSE TO THIS EVENT, CPL WILL BE ADDING A COUPON IN THE STATION PIPING THE WEEK OF APRIL 6, 2020. THIS INSTALLATION, WITH ASSOCIATED MONITORING AND CORRECTIVE ACTIONS IDENTIFIED WITH THE MONITORING, IS EXPECTED TO PREVENT THIS FAILURE FROM RECURRING.