In regulated material service
In regulated material service means, for the purposes of this subpart, equipment which meets the definition of in VOC service, in VHAP service, in organic hazardous air pollutant service, or in other chemicals or groups of chemicals service as defined in the referencing subpart.
Source
40 CFR § 63.1020
Scoping language
All terms used in this part shall have the meaning given them in the Act and in this section.