 That's the long name for PCBs, which are the main polluter in New Bedford Harbor. Aerovox and Cornell-Dubelier dumped so many PCBs into New Bedford's harbor, it became a Superfund site that's cost the EPA more than a billion dollars to clean up so far. The dirty plastic scrimshaw dramatizes this environmental tragedy using traditional maritime art. But Slip says purists wouldn't consider this a real piece of scrimshaw.