landfill cap

A landfill cap is a protective layer placed over closed waste disposal sites to prevent water from entering the landfill, which can create harmful leachate, and to reduce the release of odors and gases. Typically made of materials like clay, soil, and synthetic covers, the cap helps isolate the buried waste from the environment, minimizing pollution and protecting public health. It also helps control pests and prevent debris from blowing away, ensuring the site remains stable and safer over time.