Respondent is the owner and/or operator of a Refinery that uses, handles, and/or stores more than a threshold quantity of Flammable Mixture and Hydrogen fluoride/Hydrofluoric acid, which are regulated substances, as specified at 40 C.F.R. ยงยง 68.115 and 68.130. From August 15 to August 18, 2016, authorized representatives of the EPA conducted an inspection of the Facility to assess compliance with section 112(r)(7) of the CAA and 40 C.F.R. part 68. During that inspection, the EPA representatives observed alleged violations of 40 C.F.R. part 68. The alleged violations identified by authorized representatives of the EPA during the inspection are described below.