Hazardous waste from Superfund sites is sometimes moved to locations where it can be more closely managed and safely guarded.
Other times, it stays where it is.
Such is at the Mosley Road Sanitary Landfill Superfund site in Oklahoma City, near NE 36 and Sooner Road.
“For the most part, that waste isn't going anywhere,” said Michael Torres, who is the Environmental Protection Agency remedial project manager at the landfill.
About 2 million gallons of pesticides, acids, sludge and solvents were dumped into three unlined pits at the landfill between 1971 and 1987.
That waste is treated and stored on site.
Depending on its characteristics, the waste can be filtered in a variety of ways to neutralize its harmful aspects. Often, this treated waste is “capped,” or placed under a soil or synthetic barrier that is sloped to ensure water runoff.
Whether waste is treated on-site or moved depends on the volume of waste as well as the costs of moving and treating it, said Scott Thompson, director of the land protection division for the Oklahoma Department of Environmental Quality.
Mosley Road Sanitary Landfill and the East Oak Landfill — across the street on Mosley Road — are in compliance with federal and state standards, Torres said.