Environmental Protection Agency informational meeting concerning the Tinkham Garage Superfund site. This transcript details a comprehensive overview of the site’s history, from its origins as an agricultural and gravel operation to its contamination by industrial waste. The discussion centers on the Environmental Protection Agency’s (EPA) proposed plan to extend a permanent water line to affected residential areas, mitigating health risks from groundwater contaminated with chemicals like 1,4-dioxane and PFAS. It further elaborates on the risk assessment process, various remedy alternatives considered, and the comparative analysis that led to the waterline extension being the preferred solution, alongside details regarding community involvement and public comment opportunities.
The U.S. Environmental Protection Agency (EPA) has released a Proposed Plan for addressing groundwater contamination at the Tinkham Garage Superfund Site in Londonderry. The plan recommends extending municipal water lines to 89 residences currently relying on contaminated private wells. This interim remedy aims to reduce health risks from exposure to PFAS and 1,4-dioxane, both of which have been detected above safety thresholds in neighborhood wells.
Public Participation Opportunities:
Informational Meeting: Thursday, July 10, 2025 at 6:00 p.m.
Formal Public Hearing: Tuesday, July 29, 2025 at 6:00 p.m.
Both events will be held at Londonderry Town Hall in the Moose Hill Council Chambers and will be recorded.
Comment Period:
The public is invited to submit comments between July 11 and August 12, 2025.
Online: www.regulations.gov, Docket ID: EPA–R01–SFUND–2025–0117
Mail: Cheryl Sprague, EPA New England, 5 Post Office Sq., Suite 100, Boston, MA 02109-3912
Contact:
Cheryl Sprague, EPA Remedial Project Manager – (617) 918-1244, sprague.cheryl@epa.gov
Aaron Shaheen, EPA Community Involvement Coordinator – (617) 918-1071, shaheen.aaron@epa.gov
Kirsten Hildonen, Town of Londonderry – (603) 432-1100, ext. 153, khildonen@londonderrynh.gov
Tinkham Garage Superfund Site Water Updates: HERE
Proposed Plan: HERE