On July 22, 2025, Region 10 filed an expedited settlement agreement resolving violations of the Clean Water Act by Marathon Refinery & Nikiski Terminal (Kenai, AK). The facility is a petroleum refinery and bulk fuel storage terminal located adjacent to Cook Inlet. An EPA spill prevention, control and countermeasure (SPCC) inspection on June 10, 2024 and determined deficiencies in their SPCC plan. The refinery and storage terminal has a storage capacity of approximately 154,400,000 gallons. Marathon has agreed to pay penalty of $3,300 for the SPCC regulatory violations.