TRANSCONTINENTAL GAS PIPE LINE COMPANY

Incident Narrative

ON 12/14/17/2017 A THIRD PARTY HELICOPTER SPOTTED THE BUBBLES AND REPORTED THEM TO WGP PIPELINE CONTROL. PIPELINE CONTROL NOTIFIED WGP OPERATIONS. OPERATIONS FLEW OUT TO VERIFY COORDINATES. THE BUBBLES WERE IN THE VICINITY OF A WGP 16"" PIPELINE. THE WGP SECURITY OPERATIONS CENTER WAS NOTIFIED OF THE POTENTIAL LEAK. DUE TO INCLEMENT WEATHER PERSONNEL HAD TO TRAVEL BY BOAT TO GET TO THE ISOLATION POINTS. WE MADE THE DECISION TO SHUT IN PRODUCTION TO THE LINE ON 12/14/17. THE 16"" SECTION OF PIPELINE WAS ISOLATED ON 12/16/17. THEY THEN STARTED REDUCING THE PRESSURE IN THE SECTION OF 16"". THE DIVE BOAT WAS DISPATCHED AND DIVERS CONFIRMED THE LEAK WAS THE WGP 16"" PIPELINE. THE SOC WAS NOTIFIED OF A CONFIRMED LEAK AND THEY NOTIFIED THE NRC. ON 12/15/2017 WGP OPERATIONS ACQUIRED A 16"" PLIDCO CLAMPS THE FIRST WAS INSTALLED ON 12/20/17. 6/6/2018 AS OF THIS DATE, THERE HAS BEEN NO CHANGE TO THE OPERATIONAL STATUS OF THIS PIPELINE. IT REMAINS ISOLATED WITH NO PRESSURE. WE ARE WORKING WITH OUR PRODUCER PARTNERS AS WELL AS THE OTHER REGULATORY AGENCIES FOR APPROVAL TO ABANDON THE LINE. THE FINAL ABANDONMENT WILL TAKE PLACE IN 2020. AT THE REQUEST OF BRIAN PIERZINA, WE HAVE UPDATED THE ""FACILITY RESTART"" DATE TO 12/20/17 AS THAT WAS THE POINT IN WHICH ACTIVITIES ASSOCIATED WITH THE RELEASE EVENT WERE ESSENTIALLY CONCLUDED. THIS REPORT WILL BE NOW MARKED AS ""FINAL"".