Definitions.

§ 1604.2 Definitions.

As used in this part, the following definitions apply:

Accidental release means an unanticipated emission of a regulated substance or other extremely hazardous substance into the ambient air from a stationary source.

Ambient air means any portion of the atmosphere inside or outside a stationary source.

Extremely hazardous substance means any substance which may cause death, serious injury, or substantial property damage, including but not limited to, any “regulated substance” at or below any threshold quantity set by the Environmental Protection Agency (EPA) Administrator under 42 U.S.C. 7412(r)(5).

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