TestingSite Cleanup & RedevelopmentCompoundsSoil SamplingSoil Remediation

Soil remediation brings Oak Ridge closer to completion

After excavating more than 2,200 truckloads of soil contaminated by solvents, the DOE expects a 2024 completion date for the cleanup of an old uranium enrichment plant.

**An aerial view of EM's soil remediation project underway on the massive footprint of the former K-25 building at Oak Ridge, Tenn.** *Photos courtesy of DOE*

An area of land in Oak Ridge will be added to the Manhattan Project National Historical Park thanks to the Office of Environmental Management’s cleanup efforts there.

Crews are addressing an area of soil on the massive footprint of the former K-25 building, one of the original Manhattan Project facilities. EM crews demolished the K-25 building several years ago.

Located at the East Tennessee Technology Park (ETTP), the mile-long, U-shaped K-25 was the largest building in the world at the time of its construction. It helped enrich uranium used in weaponry that ended World War II.

Several facilities had sat inside the building’s “U” shaped footprint, and they’ve since been torn down. After removing the slabs of those facilities, employees conducted sampling that revealed an area of soil contaminated from a solvent used to clean equipment during Manhattan Project and Cold War operations.

**A worker scans excavated soil at the former K-25 building site at Oak Ridge to ensure it contains no radioactive contaminants.**

EM cleanup contractor UCOR is removing the contaminated soil, excavating down as far as 38 feet to ensure appropriate soil removal.

“As we methodically excavate and dispose of the contaminated soil, we are sampling to determine the extent to which we will have to continue digging,” says UCOR Project Manager Amanda Human. “We’ve made great progress and are working diligently to deliver an end state free of environmental risks.”

As of June 2022, crews have removed more than 2,200 truckloads of contaminated soil from this impacted area, and that project is expected to continue through 2024. All soil remediation projects at ETTP are slated for completion in 2024 as EM works to finish its cleanup at the site.

**A rendering of the viewing platform overlooking the footprint of the former K-25 building site at Oak Ridge.**

As the K-25 building site is incorporated into the national park, EM has also conducted significant historic preservation efforts there. EM is set to construct a viewing platform that oversees the entire K-25 building footprint. The facility will be adjacent to the K-25 History Center, which EM finished constructing in 2020. The platform will allow visitors to appreciate the massive size of the former building. Construction is expected to begin next year.

Uranium enrichment operations at ETTP, once known as the Oak Ridge Gaseous Diffusion Plant, ceased in 1985 and the site closed in 1987. EM has been working to transform the site into a multi-use industrial park, national park and conservation area.

Source: The U.S. Department of Energy
Source url: https://www.energy.gov/