The W.R. Grace and Company Site is located on an industrialized peninsula in south Baltimore, Maryland. During the 1950s, W.R. Grace milled thorium for the Atomic Energy Commission, resulting in low-level radioactive waste that was buried on the property. Radiation surveys identified randomly distributed contamination over the waste burial area and elevated levels of radioactivity in other locations. The primary contaminant of concern is thorium-232. The site was designated for remedial action under the Formerly Utilized Sites Remedial Action Program in 1984, but cleanup is not yet complete so long-term stewardship requirements are not yet known.