Jan 19, 2022, 7:30 am

Town Garage/Radio Beacon Superfund National Priorities List (NPL) Site

EPA Identifier: NHD981063860
CERCLIS ID: NHD981063860
42.861669, -71.393611

Londonderry, NH

Final Date: 19890331

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Programs: {CERCLIS}
Program Interests:

Site Summary:
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.

Institutional Controls:
Media Where IC Applies
(Multiple entries where more than one pathway is impacted)
Restriction Type Instrument
Ground Water
Establish Ground Water Management Zone
STANDARD MANAGEMENT PERMIT CONDITIONS 1. The permittee shall not violate Ambient Groundwater Quality Standards adopted by the Department (N.H. Admin. Rules Env-Or 600) in groundwater outside the boundaries of the Groundwater Management Zone, as shown on the referenced site plan. 2. The permittee shall not cause groundwater degradation that results in a violation of surface water quality standards (N.H. Admin. Rules Env-Ws 1700) in any surface water body. 3. The permittee shall allow any authorized staff of the Department, or its agent, to enter the property covered by this permit for the purpose of collecting information, examining records, collecting samples, or undertaking other action associated with this permit. 4. The permittee shall apply for the renewal of this permit at least 90 days prior to its expiration date. 5. This permit is transferable only upon written request to, and approval of, the Department. Compliance with the existing Permit shall be established prior to permit transfer. Transfer requests shall include the name and address of the person to whom the permit transfer is requested, signature of the current and future permittee, and a summary of all monitoring results to date. 6. The Department reserves the right, under N.H. Admin. Rules Env-Or 600, to require additional hydrogeologic studies and/or remedial measures if the Department receives information indicating the need for such work. 7. The permittee shall maintain a water quality monitoring program and submit monitoring results to the Department’s Groundwater Management Permits Coordinator no later than 45 days after sampling.
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Document Issuance, Implementation  November 26, 2007  [6 pages, 361.2Kb   ]