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On October 11, 2022, the U.S. Chemical Safety Board (CSB) released its final investigative report into “a massive fire and explosions” at the Philadelphia Energy Solutions Refinery in Philadelphia, Pennsylvania, that occurred in June 2019. According to CSB, the incident occurred when a corroded pipe elbow ruptured, releasing process fluid into the refinery’s hydrofluoric acid (HF) alkylation unit. CSB states that over 5,000 pounds of “highly toxic” HF were released, “a...

The U.S. Environmental Protection Agency (EPA) posted an August 7, 2019, petition for rulemaking submitted by the Public Employees for Environmental Responsibility (PEER) under Section 21 of the Toxic Substances Control Act (TSCA).  PEER asks that oil refineries be prohibited from using hydrofluoric acid in their manufacturing processes and that oil refineries be required to phase out the use of hydrofluoric acid within two years.  According to PEER, TSCA and the Clean Air...