Construction and demolition (C&D) materials: C&D materials results from construction, remodeling, repair or demolition of buildings, roads or other structures. It includes (but is not limited to) wood, concrete, drywall, masonry, roofing, siding, structural metal, wire, insulation, asphalt, packaging materials related to construction or demolition.

ADC (Alternative Daily Cover): Cover material other than earthen material which is placed on the surface of the active face of a municipal solid waste landfill at the end of each operating day to control vectors, fires, odors, blowing litter, and scavenging. ADC is considered a waste and does not count as recycling or beneficial use.

Beneficial use: The use of C&D materials as an ingredient in a manufacturing process, or as an effective substitute for natural or commercial products in a manner that does not constitute recycling and in a manner consistent with all applicable laws. Beneficial Use includes but is not limited to use of clean wood as hog fuel (industrial boiler fuel).

Mixed C&D: C&D materials containing both recyclable and non-recyclable C&D materials that have not been separated.

Source-separated C&D: A single kind of recyclable C&D material that has been separated from other C&D materials at the site of remodeling, repair, construction, demolition, or land clearing before it is transported to a receiving facility.