Effective remediation of PFAS at former NAS Alameda

This article published in The Military Engineer discusses PFAS remediation at the former Naval Air Station Alameda in California, representing a significant step forward in mitigating PFAS at Department of Defense (DoD) sites.

Key Benefits of Using Colloidal Activated Carbon (CAC) for PFAS Remediation:
  • Low-Cost: Typically 1/3 the cost of legacy pump-and-treat remediation methods
  • Scalable & Adaptable: Variable CAC dosing was used based on contaminant concentrations, making it adaptable to site-specific needs.
  • Effective Adsorption: CAC binds PFAS compounds (PFOS and PFOA) with over 99% reduction observed in many monitoring wells at this site.
  • Energy-Efficient & Passive: The in situ design allows for a low-energy, long-term solution without continuous mechanical operation.
  • Minimal Disruption: Injected directly into the aquifer using direct-push methods, CAC forms a permeable barrier without the need for excavation.
  • Longevity: Alameda barrier designed for a service life of at least 15 years, resisting contaminant breakthrough and back-diffusion. Most barriers will not need to be re-applied if source contamination is addressed.