PFAS Groundwater Treatment System

Project Profile

  • Project Location : New Hampshire
  • Client Industry : Contractor / Consultant
  • Owner Industry : Federal Government
  • Gwtt Scope : System Build / Procurement / Civil Work
  • Contract Value : $3.5M
  • Project Duration : 8 Months
  • Contaminants : PFAS, including perfluorinated and polyfluorinated alkyl substances (PFOA / PFOS)
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Key Project Details

  • Synthetic resin system water treatment system; first of its kind installed in United States
  • Contaminants: perfluorinated and polyfluorinated alkyl substances from fire-fighting foams
  • Site: Former U.S. Air Force Base
  • GWTT Scope: Civil work and building erection, instrumentation and controls, process equipment, tanks, piping, plumbing, fire protection, HVAC


  • A highly accelerated project schedule stemming from public interest posed many challenges during project execution and required GWTT and its partners to maintain a high level of communication and coordination

Project Narrative

GWTT served as project manager for the construction of a 200 GPM capacity groundwater extraction and treatment system at a former U.S. Air Force facility in Portsmouth, NH. The site is a former fire-fighting training area where aqueous film-forming foam (AFFF) containing PFAS compounds was used for many years.

The groundwater extraction system includes 10 wells equipped with electric submersible pumps. GWTT installed more than 11,000 LF of HDPE pipe, an 8” water service, a 4,800 SF pre-engineered steel building, all treatment process equipment, and instrumentation and controls. Electrical work was completed by a separate subcontractor.

A unique characteristic of this project was a proprietary, regenerative resin and related equipment provided by a project partner firm.