• Design a cap incorporating low permeability clay and/or a flexible synthetic liner system sufficient to prevent water infiltration into the landfill and mitigate potential exposure of the public to waste, leachate, and methane. Existing cover soils may be stripped during cap construction and reused where practical as part of a protective vegetative layer. Existing clay may be removed as necessary and reused as part of a low permeability clay cap provided it meets permeability requirements. A borrow material source should be located at a reasonable distance to prevent excessive costs. If borrow material is not available, a synthetic cap option may be appropriate. • Coordinate with local municipalities regarding land use at Covered Bridge Park and Walnut Creek Park. o Note that the City of Elsmere is open to removal/repurposing of the Covered Bridge Park property. • Develop a closure plan that addresses ongoing leachate and methane generation at the landfill. o Leachate treatment shall consist of a leachate collection system that is acceptable to both municipalities and private ownership of the site o Methane abatement activities will need to prevent methane intrusion into surrounding private property while also discharging methane that creates a safe environment for public use of the site • Conduct a mandatory on-site pre-bid meeting with potential contractors during the bidding phase of the project • Provide construction quality assurance services (CQA)/resident observer services during the construction phase
