MAGELLAN TERMINALS HOLDINGS, LP

Incident Narrative

WHILE PERFORMING ROUTINE FACILITY INSPECTION, A LOCAL OPERATOR IDENTIFIED A RELEASE COMING FROM TANK 296 AND INTO CONCRETE SECONDARY CONTAINMENT. OPERATIONS CONTROL WAS NOTIFIED AND TRANSFER OPERATIONS WERE SHUTDOWN. VALVES WERE CLOSED TO ISOLATE THE RELEASE LOCATION AND STOP THE RELEASE. VACUUM TRUCKS WERE USED TO RECOVER THE PRODUCT. AT THE TIME OF THE RELEASE, A MOVEMENT WAS BEING MADE TO TANK 418 FROM THE DISTILLATE FLUSH HEADER. THE ISOLATION VALVE BETWEEN THE DISTILLATE FLUSH HEADER AND TANK 296 FAILED AND ALLOWED SYSTEM HYDRAULIC PRESSURE TO EQUALIZE INTO TANK 296. PRODUCT FROM TANK 418 GRAVITY FED INTO TANK 296 AND CAUSED THE TANK TO OVERFILL. FOLLOWING THE EVENT, A FULL INSPECTION AND REBUILD OF THE VALVE ACTUATOR WAS PERFORMED AND IT WAS DISCOVERED THAT THE DIRECTIONAL CONTROL VALVE WITHIN THE ACTUATOR FAILED DUE TO NORMAL WEAR. FOLLOWING THE INCIDENT, MAGELLAN ALSO MADE PROCEDURAL MODIFICATIONS IN THE TESTING OF THE TANK LEVEL ALARMS AND INDICATIONS. NRC #1262467, 10/29/2019 02:35 NRC 48-HR UPDATE #1262672, 10/30/2019 16:06 SUPPLEMENTAL/FINAL (05/13/2020): UPDATED PART H NARRATIVE 10/03/2024 - UPDATED BY PHMSA PER OPERATOR APPROVAL.