- Schermerhorn: The earliest U.S. “pile” research was conducted in this building, probably in the area now identified as Lab 218-219. This work would have involved uranium-oxide; however, the scarcity of uranium at that time and the nature of the research would seem to preclude even the possibility of significant contamination. Indeed, radiation levels above background were not detected in this area. It is noted that gaseous diffusion R&D and a barrier production pilot plant operation were carried out probably in a courtyard area now used for fuel oil storage. Floor surfaces in this area are new since the MED project. No elevated radioactivity levels could be detected in this area.