As used in this title the following terms shall mean and include:

1. "Landfill" means a disposal facility or part of one at which solid waste, or its residue after treatment, is intentionally placed in or on land, and at which solid waste will remain after closure and which is not a land spreading facility, a surface impoundment, or an injection well.

2. "Municipal landfill closure project" means activities undertaken to close, including by reclamation, a landfill owned or operated by a municipality to achieve compliance with regulations promulgated by the department, or activities undertaken to implement a landfill gas management system.

3. "Cost" means the capital cost of a municipal landfill closure project or a municipal landfill gas management project, including engineering and architectural services, plans and specifications, consultant and legal services, and other direct capital expenses incident to such project, less any federal or other assistance for such project received or to be received.

4. "Landfill gas management system" means an active system for the control, capture, and management of gas created within and emitted from a solid waste landfill.

5. "Municipal landfill gas management project" means activities undertaken to implement a landfill gas management system at an active landfill which is owned or operated by a municipality.