Technical Regulations.- HDPE Materials and Geomembrane Manufacture.- Testing of HDPE Geomembrane Properties.- Deformation Behaviour.- Long-term Behaviour.- HDPE Geomembranes with Textured Surface.- Mass Transport.- Requirements for Protective Layers.- Installation of HDPE Geomembranes.- Welding of HDPE Geomembranes.- Leak Detection and Monitoring Systems.