LANDFILLS: Alternative Liners Gain Momentum From Subtitle D

In response to Subtitle D regulations and the need to address specific site issues, the industry is developing alternative liner systems that use new materials and other innovative technologies. New landfill designs have included provisions for liner systems intended specifically to protect groundwater quality. The composite liner requirement establishes that all liners systems must conform to a minimum national standard including a combination of two feet of clay covered with a synthetic geomembrane (see chart). Engineers are now approaching landfill design as an overall integrated system; for example, liner design engineers must incorporate the final capping system, stormwater ...

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