DCP MIDSTREAM

Incident Narrative

THIRD PARTY CONTRACTOR NOTIFIED DCP MIDSTREAM LOCAL REPRESENTATIVE OF POTENTIAL LEAK ON THE H LINE ON 11/14/2022. LEAK WAS CONFIRMED ON 11/14/2022 TO BE ON THE H LINE AND OPERATIONS DETERMINED LEAK TO BE A GRADE 2 LEAK AND FOLLOWED ITS PROCEDURES IN ACCORDANCE WITH STATE REGULATION FOR MONITORING UNTIL PLAN WAS ESTABLISHED TO SHUT IN PIPELINE AND REPAIR LEAK. GRADE 2 IS NON-HAZARDOUS AT THE TIME OF DETECTION, BUT REQUIRES THE OPERATOR TO SCHEDULE REPAIR BASED ON PROBABLE FUTURE HAZARD. IT CAN BE SCHEDULED FOR REPAIR ON A NORMAL ROUTINE BASIS WITH PERIODIC RE-INSPECTION AS NECESSARY. LINE WAS SUBSEQUENTLY SHUT IN ON 12/01/2022. NDE EXAMINATION OF FAILURE SITE CONDUCTED AND RESULTS INDICATED LOCALIZED CORROSION INTERNAL PITTING. FULL ENCIRCLEMENT B-SLEEVE REPAIR WAS COMPLETED ON 12/03/2022. LINE RETURNED TO SERVICE ON 12/03/2022. ON 12/14/2022 DCP ENVIRONMENTAL REPRESENTATIVE PERFORMED AN UPDATED GAS LOSS CALCULATION FROM CONFIRMED DAMAGE SIZE AND CONCLUDED THAT THE LOSS OF 6423 MCF WOULD MAKE THIS A REPORTABLE INCIDENT. CALCULATION RESULTS WERE CONFIRMED ON 12/15/2022 AND NRC/RRC NOTIFICATIONS WERE MADE.