“Underneath this landfill hill […] there’s a three-layer liner system,” Suleyman said. ”We can check that on a routine basis.”At the New Hanover County Landfill, each cell has two liners at the bottom. In North Carolina and around the world, managing PFAS in landfill leachate has become a major challenge for municipal wastewater treatment facilities. At the New Hanover County Landfill, each cell has two liners at the bottom. “If you imagine: A landfill liner system is a big bathtub, and it’s filling up with this dirty water.