“Fugitive emissions” mean those emissions that cannot reasonably pass through a stack, chimney, vent, or other functionally equivalent opening. Notwithstanding subdivision (b) of Section 39601, the state board may not revise this definition for the purposes of this section.
Source:
Section 39023.3, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=39023.3..