DENBURY GULF COAST PIPELINES, LLC

Incident Narrative

ON 11/3/2017 AT 08:30, A DENBURY EMPLOYEE CONDUCTING ROW PATROLS FOR PRODUCTION PIPELINE REPORTED VAPORS AT GROUND LEVEL OVER THE PIPELINE ROW. PIPELINE OPERATIONS WAS PROMPTLY NOTIFIED AND ISOLATION AND SHUTDOWN WAS INITIATED ON ALL DENBURY PIPELINES IN THE AFFECTED ROW. THE AREA SURROUNDING THE LEAK WAS SECURED AND THE RELEASE DID NOT RESULT IN EXPLOSION, FIRE, DEATH, PERSONAL INJURY, SIGNIFICANT PROPERTY DAMAGE, OR POLLUTION OF ANY WATER BODY, AND WAS CONFINED TO THE PIPELINE RIGHT OF WAY. AT 13:30 ON 11/3/2017, THE WEST GWINVILLE CO2 PIPELINE WAS ISOLATED FROM ITS SOURCE (BY CLOSING THE UPSTREAM AND DOWNSTREAM VALVES) AND AT 14:30 BLOW DOWN WAS INITIATED ON THE ISOLATED SEGMENT. ON 11/4/2017 DURING DEPRESSURIZATION, SHALLOW HYDRO-VAC EXCAVATION WAS INITIATED TO ASSIST IN DETERMINING THE SOURCE OF THE LEAK. DEPRESSURIZATION WAS COMPLETED AT 18:30 ON 11/4/2017. UPON MECHANICAL EXCAVATION ON 11/5/2017, A LEAK INDICATION WAS OBSERVED AT 09:30 ON THE WEST GWINVILLE CO2 PIPELINE. AN NRC TELEPHONIC REPORT WAS INITIATED AT 10:29 ON 11/5/2017. A TOTAL LENGTH OF 66 FT OF PIPE WAS EXPOSED, COATING REMOVED, AND EXAMINED BY MAGNETIC PARTICLE INSPECTION. UPON COMPLETION OF EXAMINATION THE AFFECTED PIPELINE WAS REMOVED AND REPLACED WITH PRE-TESTED PIPE ON 11/10/2017. X-RAY OF BOTH WELDS WAS ACCEPTED. THE PIPELINE WAS RESTARTED ON 11/15/2017 AT 10:48 WITHOUT INCIDENT.