GEORGE TAMARO: An Italian innovation, slurry walls were first used in 1949. The Port Authority was very courageous to use them in 1967, since slurry walls had not previously been used to this ...

After more than two decades of remediation at the former Velsicol Chemical Co. plant site in St. Louis, the U.S. Environmental Protection Agency began another major project this spring. Contractors ...

In 1978, the former Velsicol Chemical Co. plant in St. Louis was demolished and buried onsite. That included buildings, storage tanks and process piping. The plant had once manufactured a variety of ...

Busloads of people toured the Columbia Falls Aluminum Co. Superfund site on June 12 as the company and government officials explained how a slurry wall containment system might work at the site.

Over 100 feet of dirt was stacked high into the air Wednesday at the Cabot side of the Cabot-Koppers Superfund site, as bulldozers moved around the top of the pile. This is where what's known as a ...

Deep in the pit that is Ground Zero, George Tamaro climbs atop a concrete knoll. He's trying to get a closer look at an engineering wonder -- the giant concrete slurry wall his team built some 30 ...

Officials from the Environmental Protection Agency last week said they haven’t made a decision on the best way to clean up the defunct Columbia Falls Aluminum Co. plant. Thousands of tons of waste ...