A federal appeals court has upheld the dismissal of a prospective class action alleging workers' exposure to toxic chemicals at a vinyl pipe and gutter manufacturer.

The U.S. Court of Appeals for the Third Circuit affirmed a lower court ruling rejecting the plaintiffs' argument that the statute of limitations should be tolled regarding their claims and request for medical monitoring because of the discovery of new evidence.

However, the lower court ruled that evidence—data laying out their exposure to toxic chemicals at the Genova Products plant in Hazleton, which closed in 2012—had been available for decades before the plaintiffs filed their lawsuit.