Tinkham Garage
NPL SiteLondonderry, NH
According to the EPA Superfund Enterprise Management System, Tinkham Garage in Londonderry, NH is listed with NPL status NPL Site. Its Hazard Ranking System (HRS) score is 43.24. The public extract catalogs 26 contaminant records for this site. EPA marks construction of the cleanup remedy as complete. NPL listing is a cleanup-authority designation, not a measured health-risk score.
Superfund National Priorities List inclusion (status and HRS score shown above) is the EPA's formal designation that a contaminated site qualifies for long-term federal cleanup authority under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). A federal-facility classification means the site is owned or operated by a federal agency, which routes cleanup responsibility differently than a privately owned site.
"Construction Complete" (status shown above) is an EPA milestone marking that the physical remedy work is finished, not that the site has exited EPA oversight; long-term monitoring can continue afterward. Deletion from the NPL is a separate, later step the EPA takes only once it determines every planned response action is finished.
NPL listing is a cleanup-authority designation in the EPA record, not a quantitative health-risk score. HRS scores of 28.50 or above qualify a site for the NPL under the EPA screening model (toxicity, pathways, waste quantity, and affected population factors). For current site conditions and official community notices, see the EPA Regional Superfund profile and the New Hampshire environmental agency.
What is the cleanup status of this Superfund site?
Contaminants
| Contaminant | Media |
|---|---|
| 1,1,1-TRICHLOROETHANE | Groundwater |
| 1,1,1-TRICHLOROETHANE | Soil |
| 1,1-DICHLOROETHANE | Groundwater |
| 1,2-DICHLOROBENZENE | Soil |
| 1,2-DICHLOROETHANE | Groundwater |
| 1,4-DIOXANE | Groundwater |
| 2-BUTANONE (METHYL ETHYL KETONE) | Groundwater |
| 2-BUTANONE (METHYL ETHYL KETONE) | Soil |
| ACETONE | Groundwater |
| BENZENE | Groundwater |
| CHLOROBENZENE | Soil |
| CHLOROETHENE (VINYL CHLORIDE) | Groundwater |
| CHLOROFORM | Groundwater |
| CIS-1,2-DICHLOROETHENE | Groundwater |
| DICHLOROMETHANE (METHYLENE CHLORIDE) | Groundwater |
| ETHYLBENZENE | Groundwater |
| ETHYLBENZENE | Soil |
| POLYCHLORINATED BIPHENYLS (PCBs) | Soil |
| TETRACHLOROETHENE | Groundwater |
| TETRACHLOROETHENE | Soil |
| TOLUENE | Groundwater |
| TOLUENE | Soil |
| TRICHLOROETHENE | Groundwater |
| TRICHLOROETHENE | Soil |
| XYLENE (MIXED ISOMERS) | Groundwater |
| XYLENE (MIXED ISOMERS) | Soil |
Location
Other Superfund Sites in New Hampshire
| Site Name | Status | HRS Score |
|---|---|---|
| Auburn Road Landfill | NPL Site | 36.30 |
| Beede Waste Oil | NPL Site | 70.71 |
| Chlor-Alkali Facility (Former) | NPL Site | 30.54 |
| Coakley Landfill | NPL Site | 29.16 |
| Collins & Aikman Plant (Former) | NPL Site | 50.00 |
| Dover Municipal Landfill | NPL Site | 36.98 |
| Fletcher's Paint Works & Storage | NPL Site | 35.39 |
| Kearsarge Metallurgical Corp. | NPL Site | 38.45 |
| Keefe Environmental Services | NPL Site | 65.19 |
| Mohawk Tannery | Proposed NPL Site | 52.40 |
How does this site's HRS score compare in New Hampshire?
Of the 22 New Hampshire Superfund sites with a scored Hazard Ranking System (HRS) evaluation, Tinkham Garage ranks #9 by score (43.24).
Either side of it: New Hampshire Plating Co. (50.00), Troy Mills Landfill (50.00), Tibbetts Road (41.09), Mottolo Pig Farm (40.70)
Frequently Asked Questions
What is the Tinkham Garage Superfund site? ▼
What does NPL listing mean for Tinkham Garage? ▼
What is the HRS score for Tinkham Garage? ▼
What contaminants are at the Tinkham Garage site? ▼
What is the cleanup status of Tinkham Garage? ▼
NPL listing is a cleanup-authority designation in the EPA record, not a quantitative health-risk score. See Superfund Sites Explained for how the National Priorities List, Hazard Ranking System, and cleanup phases work.
Read our methodology - how this data is sourced, computed, and verified.