NHDES continues cleanup at site of diesel spill in Dover

posted on: 3/21/2024; updated: 3/22/2024

A truck carrying diesel fuel and heating oil overturned on the evening of Monday, March 18, on Route 16 northbound near the Dover/Rochester line, causing a significant spill. However, the New Hampshire Department of Environmental Services (NHDES) states there is currently “near zero risk” to public or private drinking water supplies in the area.

Approximately 2,000 gallons of diesel fuel and 800 gallons of heating oil were released, impacting the roadside and a nearby swale. Based on assessments of the spilled materials, site conditions, and timely response actions, NHDES does not expect any impact on drinking water supplies near the affected area.

The fuel company responsible for the spill has been proactive in coordinating the cleanup with its insurance providers, a remediation contractor, and an environmental consultant under NHDES oversight.

Dover Fire and Rescue and the New Hampshire Department of Transportation (NHDOT) provided immediate spill response to contain the release and prevent entry into storm drains or surface waters. Vacuum trucks, absorbent booms, dams, and trenches were rapidly deployed to limit the spread of contamination.

Contaminated soil excavation began on Thursday, March 21, and will continue over the next week, requiring some lane closures. The extent of removal is determined by field screening and laboratory analysis results.

Although NHDES currently assesses there is no risk to drinking water supplies, additional investigation will occur if any indication arises that fuel has migrated away from the immediate spill scene.

All inquiries regarding this incident should be directed to the NHDES Public Information Office line at 603-271-3503.