PLAINS MARKETING, L.P.

Incident Narrative

APPROXIMATELY SEVEN BARRELS OF CRUDE OIL WERE RELEASED WITHIN FACILITY BOUNDARIES FROM THE 12 INCH SUCTION LINE OF PUMP 5 AT DOMINGUEZ HILLS STATION. THE DATE AND TIME OF THE RELEASE (06/30/2020 AT 14:55) IS INDICATIVE OF THE EARLIEST POSSIBLE TIME THE RELEASE COULD HAVE STARTED, AS IT WAS THE LAST TIME THE STATION HAD BEEN INSPECTED AND CONFIRMED NO OIL WAS BEING RELEASED. A SUPPLEMENTAL REPORT WILL BE SUBMITTED PENDING FURTHER INVESTIGATION INTO THE CAUSE OF THE INCIDENT. SUPPLEMENTAL NARRATIVE: AFTER THE THIRD PARTY FAILURE ANALYSIS WAS COMPLETED, IT WAS DETERMINED THAT MICROBIOLOGICALLY-INFLUENCED CORROSION (MIC) IS SUSPECTED OF INITIATING OR ASSISTING THE PITTING ATTACK BASED ON THE MORPHOLOGY OF THE PITTING AND THE PRESENCE OF ACID-PRODUCING BACTERIA (APB), IRON-OXIDIZING BACTERIA (IOB), AND DENITRIFYING BACTERIA (DNB) FOUND IN THE CORROSION PRODUCTS. THE CONFINEMENT OF THE PITTING BETWEEN THE 11:00 AND 1:00 POSITION IS LIKELY DUE TO THE LOWER FLOW VELOCITY AT THIS POSITION COMPARED TO OTHER CLOCK POSITIONS IN THE ELBOW. A SECTION OF THE VERTICAL PIPE UPSTREAM, THE ELBOW, AND THE HORIZONTAL SECTION OF THE PIPE DOWNSTREAM WERE REPLACED TO PREVENT RE-OCCURRENCE. SUPPLEMENTAL NARRATIVE (2): WALL THICKNESS WAS UPDATED (PART C, Q3.B) ACCORDING TO THE RANGE (.380 - .405 INCHES) PROVIDED BY THE THIRD PARTY ANALYSIS.