What is the risk if subsurface impounds do not have proper double liners?

The risk associated with subsurface impounds lacking proper double liners primarily revolves around the potential for groundwater contamination. Subsurface impounds are designed to manage waste, and if there is a failure in the liner, hazardous substances can leak into the surrounding soil and eventually reach groundwater sources. This contamination poses significant risks to public health and the environment, as it can affect drinking water supplies and harm ecosystems.

Double liners serve as a critical barrier that enhances the containment of waste, providing an additional layer of protection against leaks or breaches. If these systems are not properly installed or maintained, the likelihood of contaminants escaping increases substantially, thereby threatening groundwater quality. This issue is particularly concerning in areas relying on groundwater for drinking and irrigation, necessitating stringent regulations and monitoring to ensure the safety of water sources.

While increased waste processing time, higher operational costs, and reduced waste capacity can also have implications for subsurface impound operations, the immediate and most critical risk associated with the absence of proper double liners is the threat to groundwater safety.