HDPE provides the optimum in lining systems for a wide variety of applications in the area of environmental protection.

Applications for environmental protection include:

Sealing membranes are required to meet the widest range and most demanding requirements in the field of groundwater protection.

HDPE Sheet offers

• Excellent chemical resistance and ageing Properties.
• Impermeability to organic media / contaminants.
• Long-term tensile / deformation behavior.

Which are the principle criteria for selecting FML For this application, the FML (HDPE) must be resistant to expected physical stresses, chemical and biological attacks. The Stress-Crack Corrosion resistance of the FML is especially important when chemical attack under mechanical loading is predictable as will be the case in most waste disposal reliable data should be made available on the Sealing Performance (Permeability) of the FML towards all toxic media, and especially against organic Contaminants ^when these are known to be present in the waste being disposed.      -

• The FML must retain its physical characteristics, particularly strength, and deformability under conditions of chemical and mechanical stress for the period of its stated service life.

• A Lining system should be designed to have a life expectancy that exceeds the operational life of the project in question. For land fill, however, the post-closure Period requires special considerations of the tensile deformation behavior of the FML.

The Industrial Sludge Basin

The Industrial Sludge Basin with Single Lining system

Uses of geomembranes in civil, geotechnical, and environmental activities are listed below.

1. Liners for potable water.
2. Liners for reserve water (e.g., safe shutdown of nuclear facilities)
3. Liners for waste liquids
4. Liners for radioactive waste liquid
5. Liners for secondary containment of underground storage tanks
6. Liners for solar ponds
7. Liners for brine solutions
8. Liners for water conveyance canals
9. Liners for waste conveyance canals
10. Liners for primary, secondary, and/or tertiary solid-wasteland fill
11. Covers (caps) for solid-waste landfills
12. Within cutoff walls for seepage control at hazardous waste sites
13. Within zoned earth dams for seepage control
14. Linings for emergency spillways
15. Waterproofing within tunnels
16. Facing of earth and rock fill dams
17. Within cofferdams for seepage control
18. Floating reservoirs for seepage control
19. Floating reservoir covers for preventing pollution
20. To control odors in landfills
21. To control vapors (radon, hydrocarbons, etc.) beneath buildings
22. To control expansive soils
23. To control frost-susceptible soils
24. To shield sinkhole-susceptible areas from flowing water
25. To prevent infiltration of water in sensitive areas
26. To form barrier tubes as dams
27. To face structural supports as temporary cofferdams
28. To conduct water flow in preferred paths
29. To act as containment structures for temporary surcharges
30. To aid in establishing uniformity of subsurface compressibility and subsidence
31. Beneath asphalt overlays as a waterproofing layer
32. To correct seepage losses in existing above ground tanks
33. Flexible forms where loss of material cannot be allowed

Plastic Lining: Range Of Applications

Lining of Oxidation ponds