40 CFR § 61.41
Definitions
June 9, 2020
Terms used in this subpart are defined in the Act, in subpart A of this part, or in this section as follows:
(a) Rocket motor test site means any building, structure, facility, or installation where the static test firing of a beryllium rocket motor and/or the disposal of beryllium propellant is conducted.
(b) Beryllium propellant means any propellant incorporating beryllium.