Using PerfluorAd, the TRS Group recently completed a cleanout of a firefighting vehicle at a major West Coast airport, reducing PFAS concentrations by more than 99.9%.

"PerfluorAd continues to provide outstanding results," says David Fleming, a founder of TRS. "Not only did we reduce PFAS concentrations by more than 99%, but we also applied it to the rinse water, reducing the airport's waste."

TRS is the North American licensee of the patented PerfluorAd® technology, developed by Cornelsen Umwelttechnologie GmbH, to clean out fire-suppression systems impacted by per- and polyfluoroalkyl substances (PFAS) found in aqueous film forming foams (AFFF). Often called "forever chemicals" due to their persistence in the environment, PFAS are notoriously difficult to remediate.

PFAS Concentrations.png


  • Remove residual AFFF and reduce PFOA and PFOS to 2 ng/l or less
  • Dispose of liquid waste in the onsite wastewater treatment plant non-detect (ND) discharge limit(detection limit 2 ng/l)
  • Compare triple freshwater rinse to PerfluorAd® Process
  • Analyze PFAS rebound

Project characteristics

  • Pierce Firefighting truck with a HUSKY 12 gpm Foam System
  • 75 gallon onboard AFFF tank
  • No PFOS detected from start


  • Truck cleanout completed in four days
  • Rebound testing after three days


  • ND for 30 of 31 PFAS analytes
  • 6:2 FTS concentration was 11.2 ng/l
  • No rebound for PFOS, PFOA
  • Incomplete PFAS removal from triple water rinse
  • Waste generated:
    • <8 gallons of PFAS sludge
    • 400 lbs of spent LGAC
    • <5,000 gallons of rinsate
    • Clean wastewater disposed onsite in treatment plant

PFOA Concentrations