GULF OF MEXICO — The Gulf Islands National Seashore has closed about 30 acres of Horn Island to the public indefinitely after BP cleanup workers discovered tiles containing asbestos.
GINS superintendent Dan Brown says one of 12 areas tested at that site also came back positive for mustard gas.
Brown says the hazardous materials are on the northwestern shore in an area that contains the remains of a military facility that was active in the 1940s.
The cleanup of the affected area may take several years.
Brown said the material was scattered over a site about an acre in size. Park rangers said a larger site would be closed to visitors during the cleanup.