A group of 16 plaintiffs claimed injuries from exposure to lead dust produced at a lead smelter in Herculaneum, Missouri, owned and operated by three companies, including Fluor, between 1986 and 1994. The plaintiffs claimed that due to the companies’ negligence, they suffer from numerous effects of lead poisoning, including lower IQs, learning disabilities, attention-deficit hyperactivity disorder, depression, and asthma. In July 2011, a St. Louis Circuit Court jury awarded the plaintiffs $38.5 million in compensatory damages and $320 million in punitive damages ($240 million of which was attributed to Fluor). In June 2014, an appellate court overturned the punitive damages award against Fluor due to an erroneous jury instruction and remanded for reconsideration of punitive damages against Fluor.