The U.S. Court of Appeals for the Fourth Circuit vacated multiple Baltimore federal court orders and revived an environmental lawsuit against six defendants accused of arranger liability in the disposal of hazardous substances in violation of the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA).

Writing for the appeals court, Judge James Andrew Wynn in Tuesday’s opinion said the district court “applied an erroneous interpretation” of CERCLA’s arranger-liability provision “when it issued its orders denying leave to amend and granting judgment on the pleadings” in a Superfund Act complaint filed by 68th Street Site Work Group.