Visible emissions
Visible emissions means any emissions, which are visually detectable without the aid of instruments, coming from RACM or asbestos-containing waste material, or from any asbestos milling, manufacturing, or fabricating operation. This does not include condensed, uncombined water vapor.
Source
40 CFR § 61.141
Scoping language
All terms that are used in this subpart and are not defined below are given the same meaning as in the Act and in subpart A of this part.