|(a) The owner or operator shall operate any unit subject
to the source cap emission limits of §117.423 of this title (relating
to Source Cap) in compliance with those limitations.
(b) All units subject to the emission specifications
of §117.405 of this title (relating to Emission Specifications
for Reasonably Available Control Technology (RACT)) or §117.410
of this title (relating to Emission Specifications for Eight-Hour
Attainment Demonstration) or §117.423 of this title must be operated
so as to minimize nitrogen oxides (NOX )
emissions, consistent with the emission control techniques selected,
over the unit's operating or load range during normal operations.
Such operational requirements include the following.
(1) Each boiler, except for wood-fired boilers, must
be operated with oxygen (O2 ), carbon
monoxide (CO), or fuel trim.
(2) Each boiler and process heater controlled with
forced draft flue gas recirculation (FGR) to reduce NOX emissions must be operated such that the
proportional design rate of FGR is maintained, consistent with combustion
stability, over the operating range.
(3) Each boiler and process heater controlled with
induced draft FGR to reduce NOX emissions
must be operated such that the operation of FGR over the operating
range is not restricted by artificial means.
(4) Each unit controlled with steam or water injection
must be operated such that injection rates are maintained to limit
NOX concentrations to less than or equal
to the NOX concentrations achieved at
maximum rated capacity (corrected to 15% O2 on
a dry basis for stationary gas turbines).
(5) Each unit controlled with post-combustion control
techniques must be operated such that the reducing agent injection
rate is maintained to limit NOX concentrations
to less than or equal to the NOX concentrations
achieved at maximum rated capacity.
(6) Each stationary internal combustion engine controlled
with nonselective catalytic reduction must be equipped with an automatic
air-fuel ratio (AFR) controller that operates on exhaust O2 or CO control and maintains AFR in the range
required to meet the engine's applicable emission specifications.
(7) Each stationary internal combustion engine must
be checked for proper operation of the engine according to §117.8140(b)
of this title (relating to Emission Monitoring for Engines).