reducing hydraulic pressure and enhancing containment of harmful constituents (Khire and Haydar 2005). Notably, they outperform conventional sand filters with thinner profiles, which increases airspace and offers superior hydraulic performance (Semach et al. 2011). When employed within leachate collection layers, geocomposites present several advantages, including their resistance to biological clogging and ability to maintain landfill infrastructure functionality when paired with geotextile filters (Fourmont et al. 2012; Koerner et al. 1993). Integrating geocomposites with geomembranes in composite liner systems enhances leachate management strategies, offering contamination barriers and efficient leachate collection and disposal mechanisms. Geomembranes with low PFAS diffusion rates Contemporary research and EPA guidance underscore the role of geomembranes in PFAS waste containment. Geomembranes made from linear low-density polyethylene (LLDPE) exhibit minimal diffusion, demonstrating enhanced performance in minimizing PFAS migration in landfill leachate (Di Battista et al. 2020; Ahmad et al. 2024; Rowe et al. 2023). Experts have recommended using a double-lined composite barrier system for the best possible performance with current geosynthetic materials. This system comprises a geomembrane as the primary containment system, as described above, followed by a secondary system that uses clay or geosynthetic clay liner (GCL). Experts have recommended using a double-lined composite barrier system for the best possible performance with current geosynthetic materials. Visit: Demtech.com Email: Sales@demtech.com Call: 1-888-324-WELD DEPLOYMENT EXTRUSION WELDERS WEDGE WELDERS TESTING EQUIPMENT OTHER TOOLS GeosyntheticsMagazine.com 19http://www.Demtech.com http://www.GeosyntheticsMagazine.com