Emergency crews responded to a report of a hazardous materials incident at the DuPont Experimental Station Saturday at about 11 a.m., at 200 Powder Mill Road, Wilmington.

Emergency crews responded to a report of a hazardous materials incident at the DuPont Experimental Station Saturday at about 11 a.m., at 200 Powder Mill Road, Wilmington.

New County Paramedics responded along with DuPont Experimental Station emergency personnel,  and fire companies from Hockessin, Talleyville, Claymont, Cranston Heights, Elsmere, Five Points, Concordville, and Bethel Township, St. Francis Hospital EMS and the New Castle County Hazardous Materials and Decontamination Team.

They found 18 workers inside the DuPont Experimental Station who were possibly exposed to an unknown substance, said County Paramedic Senior Cpl. David J. McKinney Jr.

The patients were all removed from the building and sent through a decontamination area.

New Castle County Paramedics evaluated vital signs on all patients. Each patient was transported to one of three area hospitals -- St. Francis, Wilmington and Christiana -- for evaluation.

None of the patients transported from the scene offered a complaint and all were stable, McKinney Jr. said.