PEPPERELL — The town of Pepperell is suing several industrial giants of the presence of toxic PFAS chemicals in the town’s water supply. The law firm Napoli Shkolnik, with offices in Clinton and New York, has filed a federal lawsuit in the District of Massachusetts on behalf of the town against six industrial defendants, including Honeywell International and Georgia-Pacific, alleging that decades of industrial operations along the Nashua River h…