Respondent owns and operates a Gas Plant. On or about July 11 and 12, 2023, representatives of the EPA inspected the Respondent’s Facility to determine compliance with Section 112(r) of the CAA and 40 C.F.R. Part 68. Information gathered during the EPA inspection revealed that Respondent had greater than 10,000 pounds of propane and greater than 10,000 pounds of flammable mixture (Butane, Ethane, Isobutane [Propane, 2-methyl], Pentane, Isopentane [Butane, 2-methyl-], Propane, and Methane) in a process at its facility. Information gathered during the EPA inspection revealed that Respondent stores propane and flammable mixtures of hydrocarbon gases throughout the processing units and piping, including methane, propane, ethane, butane, isobutane, pentane, and isopentane at its facility, and therefore is engaged in a process at its facility.