DCP MIDSTREAM, LP

Incident Narrative

6/27/23 @ 4:22 CST P66 HOUSTON CONTROL CENTER RECEIVES GAS DETECTION ALARM FROM LA PRYOR PUMP STATION AND FIELD TECH NOTIFIED. 5:30 AM FIELD TECH ARRIVES ON SITE AT LA PRYOR AND CONFIRMS LEAK INSIDE STATION AND WAS SHUT DOWN IMMEDIATELY. ON 6/29/22 CORRECTIVE MEASURES BY FURTHER ISOLATION OF THE PIPELINE INSIDE THE STATION COMPLETED. STOPPLES WERE INSTALLED ON BOTH SIDES OF THE LEAKING CHECK VALVE INSIDE THE STATION ON THE 20-INCH LINE UTILIZING EXISTING TEES. THE CHECK VALVE REPLACED, AND THE PIPELINE PURGED AND RETURNED TO SERVICE. OPERATIONS DETERMINED ESTIMATED COST OF REPAIRS TO EXCEED $50,000 AT APPROXIMATELY 9:30 AM CST ON 6/27/23 AND INITIAL NRC REPORT NUMBER 1371374 MADE AT 9:33 AM CST. SUPPLEMENTAL / FINAL REPORT 9-25-23 SUBMITTED FOLLOWING COMPLETION OF RAILROAD COMMISSION AND INTERNAL INCIDENT INVESTIGATIONS ON 9-11-23. VALVE WAS INSPECTED ON 7/12/23 BY THIRD PARTY/SUNBELT VALVE SERVICES INC. TO DETERMINE CAUSE OF LEAK. INTERNAL O-RING FAILURE WAS DETERMINED TO BE ROOT CAUSE. CHECK VALVE WAS INSTALLED WHEN LA PRYOR PUMP STATION WAS BUILT 2017-2018. THE O-RING APPEARED TO HAVE BEEN CRIMPED DURING INITIAL INSTALLATION OF THE CHECK VALVE GEAR BOX ASSEMBLY. CORRECTIVE ACTION / MITIGATIVE MEASURES: PMS CREATED FOR 20-INCH TOM WHEATLEY CHECK VALVES TO BE PERFORMED EVERY 6 MONTHS. (LA PRYOR PUMP STATION) JOB PLAN CREATED TO PREFORM SEMI-ANNUAL PREVENTIVE MAINTENANCE CHECKS. MAXIMO WORK ORDER 23-1822157 GENERATED AND COMPLETED 7/13/23 FOR LA PRYOR PUMP STATION 20-INCH TOM WHEATLEY CHECK VALVE. SAME PMS AND WORK ORDERS CREATED AND COMPLETED FOR: BRACKETTVILLE, ZELLA, PETTUS AND WILLOW PUMP STATIONS.