ENBRIDGE PIPELINES (TOLEDO) INC

Incident Narrative

ON JAN 29, LINE 17 BRITTON STATION UNDERWENT TWO POWER OUTAGES. THE FIRST POWER OUTAGE OCCURRED AT 10:03. THE TECHNICIAN, AFTER TALKING TO THE POWER COMPANY, INFORMED THE CONTROL CENTER THAT THE POWER WOULD BE OUT FOR A WHILE. DURING THE OUTAGE, THE UPS BATTERIES DEPLETED. AT THIS POINT THE PRESSURE SETTINGS AT THE UPSTREAM STATION WERE PLACED IN ""COM OUT"" MODE AND PRODUCT CONTINUED TO FLOW THROUGH BRITON STATION. THE POWER WAS RESTORED AT 16:50, AT WHICH TIME THE TECHNICIAN COMMUNICATED TO THE CONTROL CENTER THAT THE STATION WAS AVAILABLE. PUMPS AT BRITON WERE RESTARTED AT 17:00. LATER THAT EVENING AT 19:10, THE TECHNICIAN WAS CALLED BACK TO THE BRITTON STATION DUE TO ANOTHER POWER OUTAGE. SINCE THE UPS DID NOT FULLY RECHARGE FROM THE FIRST POWER OUTAGE, THE UPS ONLY LASTED 42 MINUTES. AGAIN, THE UPSTREAM STATION WAS PLACED IN ""COM OUT"" MODE AND PRODUCT WAS FLOWING THROUGH BRITON STATION. THE TECHNICIAN COMPLETED A WALK THROUGH VISUAL INSPECTION, AND DID NOT FIND ANYTHING OF CONCERN. IT WAS ANTICIPATED THAT THE POWER WOULD BE OUT THE MAJORITY OF THE NIGHT. WHEN THE POWER WAS RESTORED AFTER THE SECOND OUTAGE AT 23:27, THE CONTROL CENTER EXPERIENCED MULTIPLE ALARMS. AT THAT TIME, LINE 17 WAS SHUT DOWN UNTIL THE TECHNICIAN ARRIVED BACK AT THE BRITTON STATION AT 00:05 (JAN 30) TO INVESTIGATE. UPON ARRIVAL, THE TECHNICIAN DISCOVERED THE SUMP PUMP OVERFLOWED, DUE TO A SEAL FAILURE ON A MAINLINE PUMP UNIT. LINE 17 WAS RESTARTED AT 00:56 ON JAN 30, BY PASSING BRITON STATION, UNTIL THE SEAL WAS REPLACED. BRITTON STATION WAS PUT BACK INTO SERVICE LATER THAT DAY AT 16:00. THE 40 CUBIC YARDS OF CONTAMINATED SOIL HAS BEEN CLEANED UP AND DISPOSED OF AT AN APPROVED SITE.