Recently, operators of a new auto shredder operation facility in Indiana installed a secondary geomembrane barrier with an internal EVOH (ethylene vinyl alcohol) layer beneath a hardscape pad in order to prevent metal, fuel and fluids contamination of soils and groundwater. According to the American Society of Civil Engineers’ Report on American Infrastructure, geomembranes used in waste management have become the most advanced sector of engineering in the United States. However, not all geomembranes are created equally. For instance, 60-mil high density polyethylene (HDPE) geomembranes are not entirely effective at preventing gas migration of volatile organic compounds (VOCs). In order to achieve gas impermeability, an additional gas-barrier layer must be used in a lining system or a geomembrane enhanced with an internal gas layer, such as EVOH, must be utilized.
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