Where are single liner systems typically utilized?

Single liner systems are primarily utilized in Subtitle D landfills. The Subtitle D regulations, which are part of the Resource Conservation and Recovery Act (RCRA), provide guidelines for the management of non-hazardous municipal solid waste. Under these guidelines, it is acceptable to use a single liner system if certain site conditions are met, such as site-specific assessments that demonstrate low potential for groundwater contamination.

These landfills are designed for non-hazardous waste, as opposed to Subtitle B, Subtitle A, or Subtitle C landfills, which focus on specific types of waste or have stricter design and operational standards. Subtitle B landfills cater to hazardous waste, requiring more stringent controls; Subtitle A landfills are designed for municipal solid waste but have different technical requirements; and Subtitle C is to manage hazardous waste, where double liner systems are typically required to prevent groundwater contamination. Thus, Subtitle D landfills with single liner systems stand out as tailor-fit options for non-hazardous waste scenarios where environmental protections are still maintained but with a more flexible design.