SEA ROBIN PIPELINE CO

Incident Narrative

SUNDAY, MAY 17, 2020 LATE AFTERNOON OPERATIONS WAS CONTACTED ABOUT BUBBLES IN THE SMI 27 AREA, NEAR TWO OF THE SEA ROBIN WEST PIPELINES. IN TALKING TO THE USCG, BOTH A PRODUCER AND BSEE CALLED IN THE REPORTED BUBBLES BUT WERE UNABLE TO OFFER COORDINATES. SEVERAL ATTEMPTS WERE MADE TO CONTACT THE NRC BUT NO ONE ANSWERED THE HOTLINE. DUE TO THE TIME OF DAY AND WEATHER WE WERE UNABLE TO MAKE A FLIGHT AT THAT TIME. MONDAY, MAY 18, 2020 OUR OVERFLIGHT THIS MORNING CONFIRMS BUBBLES AND A DARK COLORED SHEEN ARE PRESENT. CURRENTS ARE STRONG BUT COORDINATES DO INDICATE IT IS LIKELY TO BE OUR LINE, ALTHOUGH RESPONSIBILITY CANNOT BE CONFIRMED AS OF YET. GIVEN ASSET HISTORY WE ARE GOING TO ISOLATE THE 26"" LINE 702 ON BOTH ENDS AND MONITOR PRESSURE. WE WILL ALSO BEGIN SOURCING A DSV TO MAKE AN INVESTIGATION DIVE FOR US AS SOON AS POSSIBLE. THE AFTERNOON OVERFLIGHT HAS SEEN THE SAME AMOUNT OF BUBBLES, BUT NO SHEEN. THE NRC NUMBER WE WERE GIVEN IS1277495; WE HAVE NOT TAKEN RESPONSIBILITY FOR THE LEAK AS WE HAVE YET TO CONFIRM SOURCE. A DSV HAS BEEN IDENTIFIED AND IS EXPECTED TO BE ON LOCATION MID-DAY TOMORROW TO INVESTIGATE. TUESDAY, MAY 19, 2020 THE DSV AND OUR OVERFLIGHT REPORT BUBBLES WITH NO SHEEN PRESENT. THE DSV USED A MESOTECH TO TAKE A SONAR SHOT OF THE LEAK, IT APPEARS TO BE ON THE 26"" LINE. WE ARE ALSO IN THE PROCESS OF TAKING THE LINE DOWN TO BOTTOM PRESSURE. GIVEN WE KNOW THE LINE IS OURS WE HAVE UPDATED THE NRC WITH A NEW INCIDENT NUMBER OF 1277657. WEDNESDAY, MAY 20, 2020 OVERFLIGHT AND THE DSV BOTH BUBBLES BUT NO SHEEN AS OF NOW. THE LINE PRESSURE CONTINUES TO DROP AND IS NEAR ENOUGH TO BOTTOM PRESSURE THAT OUR FIRST DIVER IS JETTING THE AREA NOW. ONCE WE ARE AT BOTTOM PRESSURE AND ARE DONE JETTING THE DIVER CAN INSPECT THE LINE THAT WILL TELL US FAILURE METHOD AND REPAIR APPROACH. THE DSV IS STAFFED TO WORK 24 HOURS SO WE WILL CONTINUE TO MAKE PROGRESS OVERNIGHT. USCG HAS BEEN UPDATED EARLIER TODAY. DIVERS ARE REPORTING THE LEAK IS IN THE 6 O'CLOCK POSITION OF THE LINE. PLANS OVERNIGHT ARE TO FINISH REDUCING PRESSURE TO MATCH BOTTOM, COMPLETE THE MASTIC REMOVAL AND UT THE AREA OF THE LEAK TO EVALUATE PIPE FOR A LEAK CLAMP REPAIR. THE NRC WAS UPDATED EARLIER TODAY, WHICH SATISFIES THE PHMSA 48 HOUR UPDATE NRC # 1277765. THURSDAY, MAY 21, 2020 AS OF 3:26PM LEAK CLAMP HAS BEEN INSTALLED CURRENTLY IN THE PROCESS OF BRINGING THE PRESSURE UP TO THE FIRST CHECKPOINT. OVERFLIGHTS INDICATE THERE HAS BEEN NO SHEEN ASSOCIATED WITH THIS EVENT. THE USCG HAS BEEN UPDATED AS TO PROGRESS. 6:12PM ALL PRESSURE CHECKS AND OVERFLIGHTS ARE COMPLETE, WITH NO SIGNS OF ANY LEAKS. THE SEGMENT IS AT LINE PRESSURE AND HAS BEEN RETURNED TO SERVICE.