ENTERPRISE PRODUCTS OPERATING LLC

Incident Narrative

AT 9:32 ON 1/15/2016, A THIRD PARTY CALLED ENTERPRISE'S CONTROL CENTER REPORTING VAPORS IN THE VICINITY OF AN ENTERPRISE PIPELINE. THE CONTROL CENTER BLOCKED THE LINE IN REMOTELY AT 09:45. AT 11:00 THE CLOSEST VALVE UPSTREAM OF THE RELEASE SITE WAS CLOSED. THE CLOSEST VALVE DOWNSTREAM WAS PREVIOUSLY CLOSED REMOTELY. THERE WAS A NOTICEABLE PRESSURE DROP IN THE CONTROL CENTER, AND AT 11:48 AN ENTERPRISE EMPLOYEE ARRIVED ON SITE TO CONFIRM THE VAPORS WERE COMING FROM THE ENTERPRISE PIPELINE. ON 1/19/2016 THE LINE WAS EXCAVATED AND A PLIDCO CLAMP WAS INSTALLED TO STOP THE LEAK. ON 1/23/2016 A DISPLACEMENT PIG WAS PUSHED BY NITROGEN IN ORDER TO EVACUATE THE LINE. ONCE THE LEL WAS DEEMED SAFE AT THE LEAK SITE, THE CRACKED PIPE WAS CUT OUT AND REPLACED. THE LINE WAS PLACED BACK IN TO NORMAL OPERATION ON 1/29/2016. UPDATED ON 7/15/2016 LINE PACK DEVIATIONS ON CPM INDICATED THAT THE LEAK OCCURRED AT APPROXIMATELY 4:30 ON 1/15/2016, HOWEVER THE DEVIATION DID NOT MEET THE ALARM THRESHOLD. THE FAILED SECTION OF PIPE WAS SUBMITTED FOR METALLURGICAL ANALYSIS. CIRCUMFERENTIAL STRESS CORROSION CRACKING WAS FOUND TO BE THE CAUSE OF THE LEAK. THE FINAL METALLURGICAL REPORT AND ENTERPRISE'S REMEDIAL WORK PLAN HAVE BEEN SUBMITTED TO PHMSA.