Respondent owns and operates the chemical manufacturing and distribution facility. Anhydrous ammonia is a “regulated substance” pursuant to 40 C.F.R. § 68.3 with a threshold quantity, as listed in 40 C.F.R. § 68.130, of 10,000 pounds. Ammonia in the concentration of greater than 20% is a “regulated substance” pursuant to 40 C.F.R. § 68.3 with a threshold quantity for ammonia in a concentration greater than 20%, as listed in 40 C.F.R. § 68.130, of 20,000 pounds. On or about April 16 and 17, 2019, representatives of the EPA conducted an inspection of 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 anhydrous ammonia and greater than 20,000 pounds of ammonia in a concentration of greater than 20% in a process at its facility.