Terms used in this subpart are defined in the Clean Air Act, in
§ 63.2, and in this section as follows: Chlorine plant bypass
scrubber means the wet scrubber that captures chlorine gas
during a chlorine plant shut down or failure. Deviation means
any instance in which an affected source subject to this
subpart, or an owner or operator of such a source: (1) Fails to
meet any requirement or obligation established by this subpart,
including but not limited to any emission limitation (including
operating limits) or operation and maintenance requirement; (2)
Fails to meet any term or condition that is adopted to implement
an applicable requirement in this subpart and that is included
in the operating permit for any affected source required to
obtain such a permit; or (3) Fails to meet any emission
limitation in this subpart during startup, shutdown, or
malfunction, regardless of whether or not such failure is
permitted by this subpart. Emission limitation means any
emission limit, opacity limit, or operating limit