Before conducting HDPE sheet covered with thick layers of garbage will then be covered with a material such as soil, construction waste and debris, yard waste, trash collection from the mud and dried mud, sand, rock, ... Class government is sprayed and compacted so they will actively prevent the emergence of insects, preventing wind blowing trash and debris, reduce odor emissions, prevent infiltration into the layer on the surface runoff water, and fire prevention fire occurs in landfills.
Figure 12. Overlay thin liner
liner Figure 13. Overlay
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