letterkenny army depot (pdo area)


The Letterkenny Army Depot was originally a 19,243 acre Army facility, most of which is devoted to ammunition storage (16,614 acres). It is located 5 miles north of Chambersburg, Franklin County, Pennsylvania. Approximately 17,000 people live within 5 miles of the Letterkenny Army Depot. The Letterkenny Army Depot was established in 1942 for ammunition storage. Since 1947, activities at the Letterkenny Army Depot expanded to include the testing, maintenance, and overhaul of wheeled and tracked vehicles and missiles; the storage and transportation of industrial chemicals and petroleum; and storage, maintenance, demilitarization, and modification of ammunition. The PDO Area includes areas associated with the storage and disposal of industrial chemicals and petroleum. The PDO Area site also encompasses areas covered under Resource Conservation and Recovery Act (RCRA) corrective action investigations, including areas associated with the storage, maintenance, demilitarization, and modification of ammunition that are located in a section of the facility commonly referred to as the Ammunition Area (AA). The Depot was included in the 1995 Base Realignment and Closure Act (BRAC), with approximately 1,462 acres designated for transfer to the private sector for local redevelopment. Most of the remaining land will continue to be part of the active Letterkenny Army Depot. To date, approximately 833 acres have been transferred to the private sector. The PDO and SE NPL sites are separated by a major groundwater/surface-water drainage divide. Letterkenny's industrial and maintenance areas, which are primarily located in the southeastern corner of the Depot, encompass approximately 2,500 acres and include warehousing, vehicle storage, administration, industrial/maintenance, recreational activities, and housing. Contamination from both NPL sites includes chlorinated organic solvents, blast media, paints, petroleum products, metals, and cleaning agents stored or disposed of in landfills, trenches, burn pits, or spilled from storage. Site Responsibility This site is being addressed by the U.S. Department of Defense under the Installation Restoration Program and Base Closure (BRAC 1995).

Hazardous Ranking Score

38 / 100

A score of 28.5 or higher qualifies a site for the Superfund National Priority List.

Regional Contact

Region 3
Within the region: (800) 438-2474
Outside the region: (215) 814-5000

Contact Region



Site Inspection
Preliminary Assessment
Final Listing On NPL

Contaminants & Health Effects

      Endocrine Disrupter
      Reproductive Toxin
      Persistent, bioaccumulative and toxic


        African American
        American Indian and Alaska Native
        Native Hawaiian


        People living
        within a 1 mile radius


        Average Income


        Occupied homes

        Potentially Responsible Parties

        Similar Sites

        Add Story


        No stories have been submitted for this site.