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Virginia Administrative Code
Title 9. Environment
Agency 5. State Air Pollution Control Board
Chapter 40. Existing Stationary Sources
12/22/2024

9VAC5-40-3270. Definitions.

A. For the purpose of these regulations and subsequent amendments or any orders issued by the board, the words or terms shall have the meanings given them in subsection C of this section.

B. As used in this article, all terms not defined here shall have the meanings given them in 9VAC5 Chapter 10 (9VAC5-10-10 et seq.), unless otherwise required by context.

C. Terms defined.

"Cold cleaning" means the batch process of cleaning and removing foreign matter from metal surfaces by spraying, brushing, flushing or immersion while maintaining the solvent below its boiling point. Wipe cleaning is not included in this definition.

"Conveyorized degreasing" means the continuous process of cleaning and removing foreign matter from metal surfaces by operating with either cold or vaporized solvents.

"Freeboard height"

a. For cold cleaners, the distance from the liquid solvent level in the degreaser tank to the lip of the tank.

b. For open top vapor degreasers, the distance from the solvent-to-air interface in the tank to the lip of the tank.

c. For conveyerized degreasers, the distance from the solvent-to-air interface to the bottom of the entrance or exit opening, whichever is lower.

"Freeboard ratio" means the freeboard height divided by the width of the degreaser.

"Lower explosive limit" means the lower limit of flammability of a gas or vapor at ordinary ambient temperatures expressed in percent of the gas or vapor in air by volume.

"Nonhalogenated solvent" means any solvent other than methylene chloride, perchloroethylene, trichloroethylene, 1,1,1- trichloroethane, carbon tetrachloride, or chloroform. Nonhalogenated solvents may include trace quantities of halogenated solvents which are:

a. Unintended residues in recycled solvents, or

b. Unintended impurities resulting from chemical reaction in the manufacturing process.

"Open top vapor degreasing" means the batch process of cleaning and removing foreign matter from metal surfaces by condensing hot solvent vapor on the colder metal parts.

"Solvent" means organic materials which are liquid at standard conditions and which are used as dissolvers, viscosity reducers or cleaning agents.

"Solvent metal cleaning" means the process of cleaning foreign matter from metal surfaces by cold cleaning or open top vapor degreasing or conveyorized degreasing.

Statutory Authority

§ 10.1-1308 of the Code of Virginia.

Historical Notes

Derived from VR120-04-2402, eff. January 1, 1985; amended, Virginia Register Volume 12, Issue 11, eff. April 1, 1996.

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