Mealey's (October 24, 2018, 8:06 AM EDT) -- WASHINGTON, D.C. — A group of chemical companies on Oct. 12 filed a petition for writ of certiorari in the U.S. Supreme Court contending that it should hear a groundwater contamination class action to settle a conflict among federal appellate courts regarding the necessity of plaintiffs satisfying the predominance requirement to achieve class status (Behr Dayton Thermal Products LLC, et al. v. Terry Martin, et al., No. 18-472, U.S. Sup.)....