PLAINS PIPELINE, L.P.

Incident Narrative

APPROXIMATELY 621 BARRELS OF CRUDE OIL WERE RELEASED FROM TANK 210 AT CRANFIELD STATION. THE DATE AND TIME OF THE RELEASE (PART A Q4) IS INDICATIVE OF THE EARLIEST POSSIBLE TIME THE RELEASE COULD HAVE STARTED BASED ON CONTROL CENTER DATA. A SUPPLEMENTAL REPORT WILL BE SUBMITTED PENDING FURTHER INVESTIGATION INTO THE CAUSE OF THE INCIDENT. SUPPLEMENTAL NARRATIVE: ON 07/08/2021 AT 06:30, THE CONTROL CENTER RECEIVED A 24-HOUR CPM LEAK DETECTION SHORTAGE ALARM, WHO THEN DISPATCHED LOCAL EMPLOYEES. THE CAUSE OF THE INCIDENT WAS ATTRIBUTED TO EQUIPMENT FAILURE. SEDIMENT BUILDUP IN THE TANK CAUSED THE ROOF DRAIN LINE TO LAY DOWN OUT OF ALIGNMENT. AS A RESULT, THE FLOATING ROOF PUT PRESSURE ON THE FLANGE AT THE ELBOW CONNECTING THE DRAIN LINE TO THE ROOF'S SUMP (ESTIMATED TO HAVE BEEN APPROXIMATELY ONE FOOT BELOW OIL LEVELS IN THE TANK), STRIPPING TWO STUDS OUT OF THE DRAIN LINE CONNECTION, WHICH ALLOWED FOR OIL TO ESCAPE THROUGH THE DRAIN LINE. TO PREVENT FUTURE INCIDENTS NEW JOINTS, STUDS, AND BOLTS WERE INSTALLED. ADDITIONALLY, THE ROOF DRAIN SYSTEM WAS FLUSHED AND HYDROTESTED TO ENSURE INTEGRITY. 09/24/2024 - UPDATED BY PHMSA PER OPERATOR APPROVAL.