Clean lumber
Clean lumber means wood or wood products that have been cut or shaped and include wet, air-dried, and kiln-dried wood products. Clean lumber does not include wood products that have been painted, pigment-stained, or pressure-treated by compounds such as chromate copper arsenate, pentachlorophenol, and creosote.
Source
40 CFR § 60.2875
Scoping language
Terms used but not defined in this subpart are defined in the Clean Air Act and subparts A and B of this part.