NEW YORK: As General Motors Corp prepares to sell its best assets to a streamlined new entity, the worst of what it owns will be auctioned off in bankruptcy court, including contaminated factory sites, parking lots in Flint, Michigan, and a nine-hole golf course in New Jersey.

One property the carmaker is ditching is a foundry in Massena, New York, bordered on the east by the St Regis Mohawk Indian Reservation and on the north by the St Lawrence River.

Built to make aluminum cylinder heads for the Chevrolet Corvair in the 1950s, it generated PCB sludge and waste from hydraulic fluids.