A federal court ruled in favor of two utility companies that Winston Calvert had represented in a long-running lawsuit.  The lawsuit sought monetary and declaratory relief under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) from Union Electric Company (Ameren Missouri) and Citizens Electric Corporation.  The lawsuit was just the latest dispute to arise out of the discharge of polychlorinated biphenyls (PCBs) in the 1950s, 60s, and 70s at the site of Missouri Electric Works, Inc., in Cape Girardeau, Missouri.  Although Missouri Electric Works closed in 1982, litigation between the various impacted parties continues.  The court held in favor of Union Electric and Citizens, and denied the plaintiffs any relief under CERCLA.