Commercial arsenic
Commercial arsenic means any form of arsenic that is produced by extraction from any arsenic-containing substance and is intended for sale or for intentional use in a manufacturing process. Arsenic that is a naturally occurring trace constituent of another substance is not considered commercial arsenic.
Source
40 CFR § 61.161
Scoping language
The terms used in this subpart are defined in the Clean Air Act, in 61.02, or in this section as follows: