During the 1950s the Atomic Energy Commission contracted the Bridgeport Brass Company to machined and shaped uranium for fabrication of reactor fuel elements for the Hanford reactor as well as the Savannah River reactor. The site was sold to Martin Marietta in the early 1960s, then to GM in 1974. When the contract expired the site was decontaminated with in standards of the time. In 1977 a radiological survey was conducted at the site and residual uranium exceeding current acceptable levels were found underneath the floor. An area of 41,000 square feet of the plant was deemed necessary for decontamination.

In 1985, while excavating for construction at the site, a tile drain line was identified as contaminated. The contaminated portions were removed, placed in 55-gallon drums, and shipped to the DOE facility Oak Ridge Tennessee for disposal.

In 1988 the Adrian Site designated for remedial action under the Formerly Utilized Sites Remedial Action Program. In 1994, a radiological survey of the site identified contamination in manholes, sumps, pipe chases and other piping. The DOE began decontamination of the area, but left in place some materials of the piping system even though they exceeded the contamination guidelines. This was done due to the high cost of complete remediation and to avoid shutting down the GM plant. The DOE feels that contamination left in the piping system poses no risk to the public.

References

http://www.lm.doe.gov/WorkArea/linkit.aspx?LinkIdentifier=id&ItemID=2091