Goss Cove Landfill: Landfill capping finished in October 2001. Sediment dredging and soil excavation have been completed. A final remedy was selected for the site in 2012 for soil, sediment, and groundwater. In January 2010, the Navy dredged contaminated sediments near Pier 1 in the former marine railway. Lower Sub Base: In 1994, the Navy removed lead-contaminated soil from the Building 31 area, disposed it off site, and filled the area with clean fill. The 19 remedies required restrictions to prevent digging, disturbing the cap and other areas as well as groundwater monitoring to make sure contaminants do not migrate to the Thames River. Monitoring will determine if the cleanup was successful.

The remedy was updated in 2007 to include institutional controls and five-year reviews because some waste was left in place.ĭefense Reutilization and Marketing Office: The Navy removed soil contaminated with PCBs and lead, filled the area with clean fill, and placed asphalt over the area. A follow-on cleanup addressed related compounds discovered at the new source area. The 1998 cleanup plan required excavating and dredging contaminated soil and sediment, and wetlands restoration. Over Bank Disposal Area: The Navy removed all contaminated soils and debris as an interim cleanup measure in March 1997. Before this, however, a cleanup was done at a drum storage area on top of the landfill. In late 1995, a cleanup plan was developed that included installing a double-lined landfill cap and monitoring the site. Leachate from the landfill drains into wetland and is ultimately carried downstream and discharged into the Thames River. The Navy investigated almost all of these areas in 1990.Īrea A Landfill: This landfill had accepted all non-salvageable materials. Wetland restoration and soil excavation at the weapons center has finished. Contaminated soil and sediment at the area known as the Over Bank Disposal Area has been removed. Eight removal actions have been completed. All three of the landfills have been capped. There has been substantial environmental progress at the site. The site is being addressed through federal actions. Top of Page What Has Been Done to Clean Up the Site? In 1988, Navy sampling revealed lead, cadmium and pesticides in sediments and surface water. In 1983, about 40 gallons of PCB-contaminated oil were reported to have been spilled onto the ground.

Inspection reports from 1982 recorded leaking containers and evidence of spills associated with containers stored on the ground. This Defense Reutilization and Marketing Office was used as a burning ground and landfill from 1950 to 1969 and is now used for temporary storage. A disposal area known as the Over Bank Disposal Area was created after an earthen dam was built in 1957. Navy is the lead agency for site investigation and cleanup, with oversight provided by EPA and the Connecticut Department of Energy and Environmental Protection.įrom 1957 to 1973, VOCs, pesticides, PCBs, spent battery acids and other wastes were buried below the water table in an 11-acre landfill situated near wetlands. The site contains many contaminated areas, including three landfills, chemical storage sites, tank farms, contaminated watercourses, and varying degrees of groundwater contamination.

It has served as an operation and support base for submarine activities in the Atlantic Ocean since 1916. Long-term cleanup and monitoring are ongoing. Wastes generated at the base contaminated soil, sediment, and groundwater. The New London Submarine Base site covers 576 acres on the eastern bank of the Thames River in Groton and Ledyard, Connecticut. What Has Been Done to Clean Up the Site?.Sign up for this Superfund site’s mailing list On this page:

U s naval submarine base groton ct