On September 8, 2025 , EPA Region 6 issued a Consent Agreement and Final Order (CAFO) under its authority pursuant to 113(d) of the Clean Air Act, 42 U.S.C. 7413(d) to Trecora Hydrocarbons, LLC (Trecora) located in Silsbee, Texas. The CAFO was issued in response to violations of SIP violations of Title 30 Texas Administrative Code 115 and 116. The CAFO requires Trecora to conduct quarterly Optical Gas Imaging (OGI) surveys on all external floating roof tanks (EFRTs), review operations and maintenance procedures for all EFRTs, install low level and low-low level alarms on all EFRTs to indicate when the roof is near landing, and pay a penalty of $92,000.