FLINT HILLS RESOURCES, LC

Incident Narrative

REVISED FINAL - UPDATED PART D SECTION 8 COSTS. ON APRIL 3, 2024, AT 9:17AM, AN ESTIMATED 0.2 BBLS OF CRUDE OIL WAS DISCOVERED AT THE FLINT HILLS RESOURCES (FHR) CLEARBROOK TERMINAL. CRUDE OIL WAS OBSERVED ON THE MPL4 PUMP 44 TEE FITTING ON THE SEAL POT DRAIN LINE ASSEMBLY. UPON DISCOVERY, OPERATIONS CALLED THE PIPELINE CONTROL CENTER TO SHUT DOWN MPL4 PUMP 44, AND THE PUMP WAS SHUT DOWN AT 09:28AM. THE MN DUTY OFFICE WAS NOTIFIED ON APRIL 3, 2024, AT 10:16AM. UPON FURTHER INVESTIGATION, IT WAS DISCOVERED THAT CRUDE OIL HAD MIGRATED ALONG THE DRAIN LINE PIPING AND INTO THE INSULATION MATERIAL ON THE DRAIN LINE. THIS REQUIRED ADDITIONAL EXCAVATION TO RECOVER THE PRODUCT. AT APPROXIMATELY 12:30PM, IT WAS ESTIMATED THAT THE COST MAY EXCEED $50,000 WITH THE ADDITIONAL EXCAVATION NEEDED. A NOTIFICATION TO THE NRC WAS MADE AT 12:39PM. THE CAUSE OF THE RELEASE WAS A CRACKED TEE FITTING ON THE SEAL POT DRAIN LINE ASSEMBLY DUE TO MISALIGNMENT. THE IMPACTED AREA WAS CLEANED UP, AND THE DAMAGED TEE WAS REPLACED ON 04/17/2024. INSPECTIONS OF THE SEAL POT DRAIN LINE ASSEMBLIES WERE COMPLETED, AND THE FITTING ON PUMP 43 WAS ALSO REPLACED ON 04/18/2024.