34 Pa. Code § 35.51
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Booth-A compartment within a room or section of an establishment, which shall be equipped for the coating of objects by the spray method. This term includes cabinet booths and tunnel booths.
Harmful materials-aterials used in spray coating except those that have been definitely proved to the Department not to be harmful under the particular conditions of use.
Respiratory protector-A device approved by the Board for giving an individual adequate protection against the inhalation of harmful materials.
Room booth-A room which is built or set apart for spray coating and equipment with exhaust ventilation, and which may be closed off entirely from the rest of the building.
Spray coating-The application of paints, stains, varnishes, lacquers, enamels, metals or similar materials by the spray method.
Spray method-The application of atomized paints, stains, varnishes, lacquers, enamels, metals or similar materials delivered through or by a spray gun or similar device by compressed air or other means.
Structure-Buildings, walls, bridges, ships (when not under maritime jurisdiction) or other fabricated units.
34 Pa. Code § 35.51