PHILLIPS 66 PIPELINE LLC

Incident Narrative

INITIAL SUBMISSION DURING EXCAVATION OF AN ANOMALY DIG, A PINHOLE LEAK WAS DISCOVERED ON THE SEMINOE LINE (SM-12) FROM PAR REFINERY BILLINGS MT TO SEMINOE PUMP STATION BILLINGS MT. THE DIG LOCATION IS LOCATED IN AN ACTIVE SUPERFUND SITE, WITH IMPACTS (ACTIVE AND HISTORIC) CO-MINGLED. INVESTIGATION IDENTIFIED A SPILL VOLUME ESTIMATE OF 1 BBL. WORK WAS STOPPED, TEMPORARY REPAIR WAS MADE. CLEAN UP INITIATED. PIPELINE WAS DOWN FOR NORMAL SCHEDULED OPERATION ON 9-5-2023 AND RE-STARTED ON 9-7-2023 FOR NORMAL OPERATIONS. SUPPLEMENTAL 11-8-2023 MRK. MADE NRC NOTIFICATION 11-8-23 @ 14:27 MT AS THE COST FOR CLEANUP AND REPAIR ARE EXCEEDING THE $50,000 REPORTING REQUIREMENT. UPDATED COST ESTIMATE PART D. SUPPLEMENTAL 3-20-2024 CORRECTED PART D QUESTION 6 USA- DRINKING WATER - TO YES AS IT IS LISTED ON HCA IMP AS COULD AFFECT. CHANGED QUESTION 4 TO YES SOIL REMEDIATION. SUPPLEMENTAL UPDATE 6-26-24 ' REMEDIATION EFFORTS WITH MONITORING WELLS HAVE BEEN INSTALLED, REFINED HYDROCARBONS ARE BEING SLOWLY RECOVERED/REMOVED FROM THESE WELLS AND IS REPORTED AT 35 BBLS RECOVERED AND COSTS FOR INITIAL RESPONSE AND REMEDIATION ACTIONS ARE AT $216,000.00. THIS PROJECT/REMEDIATION IS UNDER THE REVIEW/GUIDANCE OF MONTANA DEQ SUPER FUND SITE MANAGEMENT - BOB ROLL. THIS WILL BE A LONG -TERM REMEDIATION PROJECT. FINAL- 10-20-2024- THIS IS A LONG-TERM REMEDIATION PROJECT WITH OVERSITE FROM MDEQ PROGRAM- CECRA ' STATE SUPERFUND (DUE TO LOCATION WITHIN THE YALE OIL OF SOUTH DAKOTA SITE) ROBERT ROLL (STATE SUPERFUND PROJECT OFFICER- MT DEQ 406-444-6438, RECOVERED VOLUME TO DATE IS 52 BBLS AND A COST OF $390,000.00. PHILLIPS WOULD LIKE TO MAKE THIS A FINAL REPORT.