Respondent’s facility contains a process that produces ethylene, propylene, benzene, butadiene, and toluene. Respondent’s facility has toxic and flammable regulated substances in a process in excess of the threshold quantities listed in 40 C.F.R. § 68.130. An EPA inspector conducted an inspection of Respondent’s facility on November 18-20, 2014. Following the inspection and a review of documents provided by Respondent, EPA discovered the violations discussed below.