COLONIAL PIPELINE CO

Incident Narrative

ON 3/7/18 AT APPROXIMATELY 10:30, A SENIOR OPERATOR PERFORMING A STATION YARD CHECK NOTICED A DISTILLATE/KEROSENE ODOR AND DISCOVERED FREE PRODUCT IN THE VALVE ACCESS WELLS. THE OPERATOR IMMEDIATELY NOTIFIED THE CONTROL CENTER AND BEGAN BY-PASSING THE BELAIR STATION LOOP. THE OPERATIONS MANAGER WAS NOTIFIED AT APPROXIMATELY 10:34 AND, IN TURN, THE DIRECTOR OF OPERATIONS AND THE DISTRICT ENVIRONMENTAL MANAGER WERE NOTIFIED AT APPROXIMATELY 10:55. AT 11:15 ON 3/7/18, THE MDE WAS NOTIFIED AND AT 11:26 THE LOCAL COUNTY (HARTFORD) WAS NOTIFIED. AT APPROXIMATELY 12:00, A PROJECT CREW ARRIVED AT THE FACILITY TO EVALUATE THE SITUATION. AT 12:53 THE CONTROL CENTER NOTIFIED THE NRC. AT APPROXIMATELY 14:47, THE CONTROL CENTER SHUT DOWN LINE 3. ON 3/8/18 AT APPROXIMATELY 03:30, THE LEAK SOURCE WAS IDENTIFIED ON THE 20"" ALTERNATE DISCHARGE VALVE PIPING. AT APPROXIMATELY 17:00 ON 3/8/18, A PLIDCO CLAMP WAS INSTALLED. AT 19:04 ON 3/8/18, LINE 3 WAS RESTARTED. THE SITE INVESTIGATION AND REMEDIATION ARE ONGOING. UPDATE 4/19/18: PART A, 9 AND 11: UPDATED RELEASED AND RECOVERED VOLUMES THE CAUSE OF THE INCREASE IN ESTIMATED VOLUME RELEASED IS BASED ON THE INCREASED SOIL CONCENTRATIONS FROM ADDITIONAL LAB ANALYTICAL RESULTS. FINAL REPORT - AN INCIDENT ANALYSIS WAS CONDUCTED AND INTERNAL CORROSION WAS FOUND TO BE THE ROOT CAUSE. THE STATION ALTERNATE DISCHARGE PIPING WAS PERMANENTLY REMOVED ON 6/26/18.