PLAINS PIPELINE, L.P.

Incident Narrative

APPROXIMATELY 45 BARRELS OF CRUDE OIL WERE RELEASED WITHIN SECONDARY CONTAINMENT FROM THE RELIEF LINE OF PUMP P-103. THE DATE AND TIME OF THE RELEASE (6/19/19 @ 7:30), IS INDIVICATIVE OF THE EARLIEST POSSIBLE TIME THE RELEASE COULD HAVE STARTED, AS IT WAS THE LAST TIME THE LOCATION HAD BEEN VISITED AND CONFIRMED THAT NO CRUDE OIL WAS BEING RELEASED. TO MITIGATE FUTURE RELEASES, PAA HAS REPLACED THIS SECTION OF PIPE. A SUPPLEMENTAL REPORT WILL BE SUBMITTED, PENDING THIRD PARTY INVESTIGATION OF THE PIPE. SUPPLEMENTAL NARRATIVE: RESULTS OF THE THIRD PARTY ANALYSIS INDICATE THAT LOCALIZED INTERNAL PITTING OCCURRED ON THE PIPE SECTION DUE TO INTERNAL CORROSION NEAR THE 6:00 O'CLOCK ORIENTATION. TWO PIN HOLE LEAK LOCATIONS WERE ASSOCIATED WITH TWO DIFFERENT INTERNAL PITS. THE PITS WERE DISCRETE AND LIKELY CAUSED BY MICROORGANISMS (MIC) WITH A POSSIBLE CONTRIBUTION FROM CARBON DIOXIDE (CO2). IN ORDER TO PREVENT FUTURE RELEASES, HYDRO TESTS HAVE BEEN CONDUCTED FOR LINE 61 STATION PIPING, INCLUDING THE PORTION THAT LEAKED TO ENSURE INTEGRITY OF THE LINE. ADDITIONALLY, PAA IS PLANNING TO REPLACE THE DOWNSTREAM SIDE OF THE RELIEF SYSTEM TO ABOVEGROUND PIPING AND HYDRO TEST THE ENTIRE RELIEF SYSTEM IN 2020.