Respondent is the current operator of a chemical manufacturing and distribution facilities. The General Duty Clause applies to any stationary source producing, processing, handling, or storing regulated substances, as defined above, or other extremely hazardous substances (“EHS”). EHSs include regulated substances listed pursuant to Section 112(r)(3) of the Act at 40 C.F.R. § 68.130 and chemicals on the list of extremely hazardous substances published under the Emergency Planning and Community Right-to-Know Act of 1986 at 40 C.F.R. Part 355, and may include the Facility’s proprietary chemicals as well. Respondent closed one Facility on June 11, 2020, having transferred the chemicals present there to its other Facilities. On August 27, 2020, EPA entered into an Administrative Compliance Order on Consent with Respondent to address the violations at both facilities.