PFAS Preparedness Study and Treatment Design
Town of Easton • Easton, MA
Solution Overview
Client:
Town of Easton
Business Challenge:
- Six per- and polyfluoroalkyl substances (PFAS) could routinely exceed maximum contaminant level (MCL) at three wells
- Existing treatment practices were not equipped to remove PFAS
Solution:
- Retrofit granular activated carbon (GAC) pressure vessels to existing groundwater facilities
Results:
- Permitting, final design, and construction to be completed in 2023
Challenge
Finished water sampling results suggested that levels of six PFAS compounds routinely exceed the Massachusetts PFAS6 MCL at Wells 1, 2, and 4R in the Town of Easton (the Town). PFAS is not readily removed by the Town’s existing treatment practices, so major upgrades would be required for the Town to continue operating these three key drinking water sources.
Solution
The Town engaged Environmental Partners (EP), Apex Companies’ Infrastructure Solutions platform, to assist with designing, permitting, and overseeing construction of three PFAS removal systems. GAC pressure vessels will be installed at each of the impacted sources as a retrofit to the Town’s existing treatment system. Due to proximity, Wells 2 and 4R will share a backwash drying bed, reducing project costs. Additional space and connection points are provided at each site should removal of iron and manganese be required, and all vessels have the capability to operate with various media types should regulations change in the future.