Waste, Hazardous Materials, Landfills, and Waste-to-Energy SOQ

Leachate assessments, collection and treatment

WSP staff includes engineers, geologists, and environmental scientists who combine their expertise to develop effective and environmentally responsible landfill leachate management programs. Leachate management is a key area in the operation of an active landfill, and we have experience assisting clients with leachate management issues, including alternative daily cover, interim geosynthetic lining, leachate recirculation, and alternative leachate treatment/disposal methods including leachate evaporation. We work with our clients to meet regulatory guidelines and create systems that lessen the landfill’s impact on the environment by reducing its carbon footprint. Leachate Minimization Leachate minimization can lower treatment and disposal costs, and reduce liability. To identify minimization opportunities, WSP can evaluate the leachate collection system and facility generation rates to identify areas with excessive production. Site conditions such as filling sequence, waste volume, design, and climate are then evaluated to help us create a best-fit minimization plan. Leachate minimization solutions include: z Alternative cover materials z Temporary and intermediate cover systems z Stormwater diversions

z Changes to working face geometry z Design and construction techniques z Evaluation of special waste acceptance Leachate Recirculation

Properly managed leachate recirculation and reuse can significantly reduce leachate disposal costs and enhance landfill gas production. Recirculation volumes must be balanced with the waste-adsorption capacity and associated operational challenges. Evaluation of current waste volumes, precipitation, gas collection-system performance and historical recirculation practices help identify acceptable recirculation rates.

28