The Region 4 Superfund Program serves the more than 50-million citizens of the eight southeastern states; the largest and fastest growing Region in the country. Region 4 encompasses many irreplaceable natural resources, including: the Great Smokey Mountains; Mississippi River; Florida Keys; Okefenokee Swamp; one third of the wetlands and coastline in the lower 48 states; and, estuaries providing habitat for 98% of the nations' commercial marine fisheries. With the support of our states, tribes and communities, the Superfund program in Region 4 has identified more than 7,000 hazardous waste sites. Of these, 258 private and federal facility sites are being managed through the Region's Superfund Remedial Program, including 215 on the National Priorities List (NPL), which have been or are being cleaned up under EPA's authority. Region 4 aggressively pursues enforcement through the 'polluter pays' principle, and, as a result, the majority of our Superfund cleanups are potentially responsible party lead. Region 4's Superfund Emergency Response Program responds to more than 100 environmental emergencies each year, in addition to taking a lead role in Homeland Security.