An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Hazardous Waste Cleanup: United States Army Garrison Adelphi Laboratory Center in Adelphi, Maryland

On this page:

Cleanup Status

EPA made its Corrective Action Remedy Decision on August 23, 2018,  of "Corrective Action Complete with Controls" at the Adelphi Laboratory Center (ALC), consisting of ‘no further action’ for soil, and for groundwater, implementation of an institutional control prohibiting use of site groundwater for drinking water purposes.




Top of Page

Site Description

Interactive Map of U.S. Army Garrison Adelphi Laboratory Center, Adelphi, Maryland

View larger map

The Adelphi Laboratory Center (ALC) is an active 207-acre U.S. Army research and development Facility located at 2800 Powder Mill Road in Adelphi, Maryland, a suburb of Washington, D.C.

ALC activities have included development of electronic fuses for projectiles (i.e., mortar, artillery, rockets, missiles) and associated electronic technology, research on fluidics and nuclear weapons effects technologies. Operations are conducted on a small or prototype scale rather than full scale production.

Top of Page

Contaminants at this Facility

 Residual or remaining contamination is in groundwater only, in a defined plume located in the eastern area of ALC. The primary contaminant is trichloroethylene (TCE), a dissolved solvent, that was released on the adjacent property, the former Naval Surface Warfare Center, White Oak Detachment, and flowed downgradient in groundwater (GW), impacting ALC GW. GW was actively treated and is monitored for attenuation annually by the U.S. Navy.  

Top of Page

Institutional and Engineering Controls at this Facility

 Land Use Controls were developed and are implemented by the Navy on the former Navy Site, which includes ALC and the General Services Administration (GSA) properties. On-site GW use is prohibited for drinking water purposes.

Top of Page

Land Reuse Information at this Facility

Site is under continued use.

Top of Page

Site Responsibility at this Facility

Resource Conservation and Recovery Act (RCRA) Corrective Action activities at this facility are being conducted under the direction of the EPA Region 3.

Top of Page