Many landfills now require countermeasures against groundwater contamination, an example being installing a barrier along the foundation of the landfill to contain the hazardous substances that may remain in the disposed waste.
Many landfills now require countermeasures against groundwater contamination. Groundwater contamination is an example. This example is being installing a barrier along the foundation of the landfill. This was to contain the hazardous substances. These hazardous substances may remain in the disposed waste.