The Respondent owns and operates a ferric chloride manufacturing facility, which maintains a maximum inventory of 3,000,000 pounds of the regulated toxic substance chlorine, as stated in the December 21, 2021, RMP that was submitted to and reviewed by EPA. Chlorine is a regulated toxic substance under Section 112 of the CAA with a threshold quantity of 2,500 pounds as set forth in Table 1 at 40 C.F.R. § 68.130. The Facility is subject to Program 3 because the process is subject to the OSHA process safety management standard, 29 C.F.R. § 1910.119, in accordance with 40 C.F.R. § 68.10(i), and does not meet the Program 1 eligibility requirements at 40 C.F.R. § 68.10(g).