COLONIAL PIPELINE CO

Incident Narrative

ON 09/09/16 AT 11:10 CST THE COLONIAL PIPELINE CONTROL CENTER WAS NOTIFIED OF A SUSPECTED LEAK IN SHELBY COUNTY, AL (APPROXIMATELY 9 MILES UPSTREAM OF PELHAM STATION). THE CONTROL CENTER REPORTED SHUTDOWN AND REMOTE ISOLATION OF THE SEGMENT AT 11:30. AT 11:20 LOCAL ROW PERSONNEL WERE DISPATCHED TO INVESTIGATE. AT 12:14 FIELD OBSERVERS CONFIRMED A RELEASE OF GASOLINE. NRC WAS NOTIFIED AT 12:59 VIA REPORT #1158584. ADEM, COUNTY EMA AND LOCAL FIRE DEPARTMENTS WERE SUBSEQUENTLY NOTIFIED AND A UNIFIED COMMAND SYSTEM STRUCTURE WAS IMPLEMENTED. SUBSEQUENT NRC REPORTS WERE MADE AS FOLLOWS: 9/09/16 23:13 - #1158628 UPDATE TO 1,000 BBLS 9/13/16 18:58 - #1158929 UPDATE TO 6,000 BBLS ON 01/27/17 DNV GL SUBMITTED THE ROOT CAUSE FAILURE ANALYSIS REPORT TO COLONIAL. THE REPORT STATED THAT ""A WRINKLE OCCURRED IN THE PIPE EXTENDING APPROXIMATELY 180 DEGREES FROM THE 9 O'CLOCK TO 3 O'CLOCK POSITION. A CIRCUMFERENTIAL CRACK OF APPROXIMATELY 1-1.5 INCHES WAS PRESENT AT APPROXIMATELY THE 12 O'CLOCK POSITION AT THE WRINKLE PATH. THE WRINKLE WAS CAUSED BY ""INADEQUATE SOIL CONSOLIDATION UNDER LINE 01 FOLLOWING MAINTENANCE/RECOAT ACTIVITIES IN 2015."" UPDATE 2/14/18: SOIL MASS BALANCE FOR THE CR91 RELEASE WAS CALCULATED USING LANDFILL WEIGHT TICKETS AND AN AVERAGE OF THE TPH GRO FROM STOCKPILE SAMPLES. THE TPH GRO AVERAGE WAS 278.5 MG/KG AND THE SOIL WEIGHT WAS 13942 TONS. USING THE WORKSHEET, TOTAL VOLUME OF PRODUCT IN SOIL WAS CALCULATED TO BE 1,275 GALLONS. ALL SOIL WAS DISPOSED OF AT A LANDFILL WITH DISPOSAL APPROVAL BY ADEM. ANY FUTURE, LONG-TERM REMEDIATION WILL BE CONDUCTED UNDER THE GUIDNACE OF ADEM.