On October 13, 2019, there was an incident at the Facility that resulted in an accidental release. Corroded piping caused a leak of approximately 258 lbs of a mixture of extremely hazardous chemicals that were released to the air and ground. Respondent's failure to perform inspections and tests on process equipment at a frequency consistent with applicable good engineering practices is a violation of Section 112(r)(7) of the
CAA, 42 U.S.C. 7412(r)(7), 40 CFR 68.73(d)(1)-(3),