Environmentalists are renewing their effort to force EPA to promulgate TSCA restrictions on hydrogen fluoride (HF) at oil refineries, filing an amended complaint that seeks to bolster their standing after a judge dismissed an earlier iteration of their suit saying they had failed to show the threat of an HF-related disaster was significant enough. In a July 22 amended complaint in Clean Air Council, et al. v. EPA, et al. pending in the U.S. District Court for the Central…