ENBRIDGE ENERGY, LIMITED PARTNERSHIP

Incident Narrative

DURING AN INTEGRITY DIG ON FEBRUARY 10, CONTRACTOR CREW SMELLED CRUDE OIL AT APPROXIMATELY 3:15 PM CST. THE PIPELINE WAS SHUTDOWN AT 3:54 PM CST TO INVESTIGATE THE SOURCE OF THE CRUDE ODOR. AFTER FURTHER INVESTIGATION IT WAS CONFIRMED THAT CRUDE OIL WAS SEEPING FROM BEHIND THE COAL TAR PIPELINE COATING. APPROXIMATE VOLUME OUT IS 1 1/2 CUPS. THE INTEGRITY DIG LOCATION WAS BASED UPON THE LINE 62 MAGNETIC FLUX LEAKAGE IN-LINE INSPECTION TOOL RUN WHERE THE TARGET ANOMALY WAS CALLED OUT AS INTERNAL METAL LOSS INDICATION LOCATED AT MP 20.8627. THE ACTUAL SOURCE POINT OF THE LEAK WAS APPROXIMATELY 2 INCHES FROM THE TARGETED ANOMALY. THE FEATURE WAS NOT REMOVED; REPAIRS WERE MADE BY INSTALLING A 2 FOOT LONG TIGHT FITTED SLEEVE. THE THRU-WALL FEATURE WAS IDENTIFIED AS A MANUFACTURING FLAW BASED ON RESULTS OF DIRECT ASSESSMENT OF THE FEATURE IN THE FIELD AND ANALYSIS OF THE CORRESPONDING ILI DATA. THE ORIENTATION OF THE FEATURE WAS NOT ALIGNED WITH PRINCIPLE STRESS ON THE PIPE. VISUALLY THE FEATURE MATCHES DESCRIPTION OF LAP AS DEFINED BY API STANDARD 5T1. LESS THAN 1 CUBIC FOOT OF CONTAMINATED SOIL WAS REMOVED AND DISPOSED OF AT AN APPROVED DISPOSAL FACILITY