Ownership of the Jersey City Site, located in Jersey City, New Jersey, is divided between private interests and Jersey City. The Kellex Corporation was formed in 1943 to conduct engineering research in gaseous diffusion for uranium enrichment for the Manhattan Engineer District and the U.S. Atomic Energy Commission. From 1943 to 1953, site activities focused on fuel reprocessing and component testing with uranium hexafluoride, development of a solvent extraction process for the recovery of uranium, gas decontamination studies, and decontamination of waste streams.

DOE conducted a radiological survey of the site in 1977, and remediated those portions of the site with radioactive contamination between 1979 and 1983. DOE certified that the site complied with applicable cleanup criteria in September 1983 and, with State of New Jersey concurrence, released the property for unrestricted use.

No supplemental limits or institutional controls are in effect at the privately owned site, and DOE does not require on-site monitoring or surveillance. Legacy management activities consist of managing site records and responding to stakeholder inquiries.