ENBRIDGE ENERGY, LIMITED PARTNERSHIP

Incident Narrative

ON JANUARY 13 AT APPROXIMATELY 1:20 PM CST, 5 BARRELS OF OIL WAS DISCOVERED IN THE TANK 5 CONTAINMENT AREA OF THE SUPERIOR TERMINAL BY A MECHANIC PERFORMING MAINTENANCE ON A VALVE IN THAT SAME AREA. PIPELINE MAINTENANCE AND TERMINAL PERSONNEL WERE DISPATCHED TO THE RELEASE AREA TO BEGIN CLEANUP OF THE OIL AND INVESTIGATE THE SOURCE OF THE RELEASE. THE TWO VALVES IN CLOSEST PROXIMITY TO THE OIL WERE LOCKED OUT LOCALLY BY THE FIELD PERSONNEL. OF THESE VALVES, TECHNICIANS WERE UNABLE TO BLOCK AND BLEED 221-V-314, WHICH HAD BEEN USED EARLIER THAT SAME MORNING. HYDROVAC CREWS EXCAVATED DOWN 24"" BEFORE EXPOSING A LEAK ON THE THREADS OF A 1/2"" FITTING ON THE VALVE UPPER BODY PIPING. THE FITTING WAS DISCOVERED TO HAVE CRACKED DUE TO FROST PENETRATING 18-24"" DOWN AROUND THE VALVE. THE 1/2"" FITTING AND PIPE WERE REPLACED LATER THAT SAME NIGHT. THE VALVE WAS TURNED OVER TO THE EDMONTON CONTROL CENTER THE SAME EVENING AT APPROXIMATELY 11:00 PM. APPROXIMATELY 500 CUBIC YARDS OF CONTAMINATED SOIL WAS DISPOSED OF AT AN APPROVED LANDFILL.