Law360, New York (August 30, 2013, 12:21 PM EDT) -- Congress passed Superfund (the Comprehensive Environmental Response Compensation and Liability Act) in 1980. Since then, this federal program has addressed (cleaned up or under way) about 1,700 hazardous waste sites. There are about 300,000 state and federal hazardous waste sites total in the United States.
Treatment, removal and containment are the most common cleanup approaches. For example, contaminated soils may be removed for disposal elsewhere or contained in place with a subsurface slurry wall around the sides and a cap over the top.