"HOLLY ENERGY PARTNERS - OPERATING, L.P."

Incident Narrative

"ON MAY 15, 2025, AT APPROXIMATELY 15:20 CST, A RELEASE OF REFINED PETROLEUM PRODUCT OCCURRED ON THE TRUST 6-8 HAZARDOUS LIQUID PIPELINE BETWEEN HAWLEY STATION AND THROCKMORTON STATION IN JONES COUNTY, TEXAS. THE RELEASE WAS INITIALLY IDENTIFIED DURING A ROUTINE AERIAL PATROL, AT WHICH TIME PIPELINE PERSONNEL WERE NOTIFIED, AND THE AFFECTED SEGMENT WAS IMMEDIATELY SHUT DOWN BY THE CONTROL CENTER. INITIAL FIELD ESTIMATES INDICATED A RELEASE OF APPROXIMATELY 40 BARRELS OF PRODUCT TO THE GROUND. NO FIRE OR IGNITION OCCURRED, AND NO INJURIES WERE REPORTED. SUBSEQUENT MEASUREMENT AND RECOVERY EFFORTS DETERMINED THE TOTAL VOLUME LOST WAS APPROXIMATELY 25 BARRELS, ALL OF WHICH WAS RECOVERED DURING RESPONSE AND REMEDIATION ACTIVITIES. THE PIPELINE WAS OPERATING WITHIN ITS ESTABLISHED MAXIMUM OPERATING PRESSURE AT THE TIME OF THE INCIDENT. THE FAILURE WAS DETERMINED TO BE THE RESULT OF EXTERNAL CORROSION ASSOCIATED WITH A DEFECTIVE CATHODIC PROTECTION CAD-WELD CONNECTION AND SHIELDING AT THE PIPE SURFACE, WHICH LED TO A PINHOLE LEAK. THE LEAK DETECTION SYSTEM DID NOT REGISTER THE RELEASE DUE TO THE VERY SMALL SIZE OF THE LEAK, WHICH WAS BELOW SYSTEM DETECTION THRESHOLDS. EMERGENCY RESPONSE ACTIONS INCLUDED PROMPT SHUTDOWN OF THE PIPELINE, NOTIFICATION OF THE NATIONAL RESPONSE CENTER AND APPLICABLE STATE AGENCIES, AND MOBILIZATION OF ENVIRONMENTAL CONTRACTORS FOR CONTAINMENT AND REMEDIATION. THE DAMAGED PIPE SEGMENT WAS ISOLATED, REMOVED, AND REPLACED, AND THE PIPELINE WAS SAFELY RETURNED TO SERVICE ON MAY 23, 2025, FOLLOWING COMPLETION OF REPAIRS AND VERIFICATION TESTING."