Leachate is liquid generated from rainfall and the natural decomposition of waste that is filtered through the landfill to a leachate collection system. The leachate collection system's job is to direct the leachate to collection sumps so it can be properly removed from the landfill.
The leachate collection system is designed with a minimum 2 percent slope to drain to collection sumps. A leachate collection sump consists of an HDPE riser and submersible pump. Leachate drains to the leachate collection system, and the leachate is then piped to an onsite leachate storage tank. The leachate is transported to an approved offsite wastewater treatment plant for disposal.