Environmental lining and containment systems are often used to protect the ground water and prevent the spread of contaminants. Geosynthetic Clay Liners (GCLs) are frequently used in environmental containment applications as an alternative to compacted clay liners. GCLs consist of layers of geosynthetics surrounding a layer of low-permeability sodium bentonite or polymer enhanced bentonite. The materials are needle-punched together into a high-performance lining material capable of resisting high shear forces.
In any liner application, compatibility and slope stability should be evaluated, as various GCLs are available depending on the site conditions and application. We are available to help with chemical compatibility and slope stability evaluations.
Coal Combustion Residual Containment
In 2016, under the Resource Conservation and Recovery Act (RCRA), the USEPA enacted new Federal guidelines for CCR materials disposal. As part of those new rules, CCR materials have to be contained within a composite liner system to prevent contaminants from leaching into groundwater. GCLs are an acceptable alternative to compacted clay in these applications.
GCLs are an acceptable alternative to compacted clay liners in RCRA Subtitle D (solid waste) and Subtitle C (hazardous waste) disposal facilities.