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NPL Site Narrative for Town Garage/Radio Beacon

Londonderry, New Hampshire

Federal Register Notice:  March 31, 1989

Conditions at proposal (June 24, 1988): Holton Circle is a development of about 25 lots in Londonderry, Rockingham County, New Hampshire. The NPL site is defined as a series of residential wells and one commercial well, the "Town Garage" well. According to tests conducted in 1984 by the New Hampshire Water Supply and Pollution Control Commission, the wells are contaminated with 1,1-dichloroethylene and 1,1-dichloroethane. The area consists of mixed rural and residential properties and is being actively developed. An estimated 8,300 people obtain drinking water from private wells within 3 miles of Holton Circle.

The New Hampshire Department of Environmental Services and EPA have been investigating this area since 1985 and have not yet verified a source of the contamination. The Department of Defense owned Town Garage, located 1,000 feet west of Holton Circle, from the early 1940s to 1968 and operated a radio beacon there during World War II.

EPA has also investigated a small auto repair shop about 1,000 feet south of Holton Circle. The shop uses 1-2 gallons of degreasing solvents annually.

Status (March 31, 1988): EPA is considering various alternatives for the site.

For more information about the hazardous substances identified in this narrative summary, including general information regarding the effects of exposure to these substances on human health, please see the Agency for Toxic Substances and Disease Registry (ATSDR) ToxFAQs. ATSDR ToxFAQs can be found on the Internet at ATSDR - ToxFAQs (http://www.atsdr.cdc.gov/toxfaqs/index.asp) or by telephone at 1-888-42-ATSDR or 1-888-422-8737.

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