E.P.A. Suggests Additional Water Line Connections for Groundwater Contamination at Tinkham Garage Superfund Location in Londonderry, New Hampshire

The E.P.A. (EPA) in consultation with New Hampshire Department of Environmental Services (NHDES), is proposing additional connections to an existing water line for residents whose wells have been found to have contamination and whom live northeast section of the Tinkham Garage Superfund Location (Site). This suggestion is included in a outline Explanation of Significant Differences, a document that provides details on the contamination and this proposal. E.P.A. and New Hampshire DES will hold a public informational meeting on October eight^th at 6:00 pm in the Merrill Conference Room at the Town Hall located at 268B Mammoth Road in Londonderry to discuss the details of this suggestion and the next steps.

Last winter, NHDES, conducted a residential well sampling plan not related to the Site, and that sampling activity identified several water supply wells with contamination similar to those being monitored at the Tinkham Site. While additional monitoring within the neighborhood continues, NHDES immediately provided impacted households with water treatment systems and/or bottled water depending on the test results.

E.P.A. has drafted an Explanation of Significant Differences (ESD) which is proposing the use of an existing waterline to provide the most permanent and sustainable solution to protect human health. The outline ESD also establishes a cleanup level in groundwater at the Location for the compound 1,4-Dioxane (an additional contaminant identified at the Site). The outline ESD will be accessible for public review for 21-days from October nine^th through October 30^th.

The Tinkham Garage Superfund Location covers about 25 acres in Londonderry, New Hampshire. The open and wooded land is bordered by residential and agricultural land. During the 1970s, oil, oily materials, washings from septic tank trucks, and other substances were discharged on the site. In May 1978, the State ordered the Location owner to prevent further degradation of surface water and ground water. In November 1981, E.P.A. detected chemicals in ground water at the site. In October 1982, volatile organic chemicals were identified in surface water and ground water in areas adjacent to the site. A waterline was installed in 1983 to provide alternative water to the over 400 residents living southwest of the Site, whose water supply was found to be impacted by Location contaminants.

For more information please visit:

http://www.epa.gov/region1/superfund/sites/tinkham

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