Ground zero is contaminated

• Dust and smoke from the collapse, fire, and clean up may pose a health risk, mostly to site workers (http://www.hhs.gov/news/press/2001pres/20010916b.html).
• Asbestos is a primary concern for the NY Committee for Occupational Safety and Health (http://www.nycosh.org/linktopics/WTC-catastrophe.html)
• Asbestos, benzene and other contaminants have been found in debris at ground zero and at the Staten Island landfill (http://www.epa.gov/epahome/wtc/data_summary.htm).
• Air quality issues include asbestos, dioxin, and other contaminants.

Is there contamination outside of ground zero?