| (2) if the unit is not operated with a NOX CEMS or PEMS under §117.440 of this
title, a block one-hour average, in the units of the applicable standard.
Alternatively for boilers and process heaters, the emission specification
may be applied in pounds per hour, as specified in paragraph (1)(C)
of this subsection.
(c) Related emissions. No person shall allow the discharge
into the atmosphere from any unit subject to NOX emission
specifications in subsection (a) of this section, emissions in excess
of the following, except as provided in §117.425 of this title
(relating to Alternative Case Specific Specifications) or paragraph
(3) or (4) of this subsection.
(1) Carbon monoxide (CO) emissions must not exceed
400 ppmv at 3.0% O2, dry basis (or alternatively,
3.0 g/hp-hr for stationary internal combustion engines; or 775 ppmv
at 7.0% O2, dry basis for wood fuel-fired
boilers or process heaters):
(A) on a rolling 24-hour averaging period, for units
equipped with CEMS or PEMS for CO; and
(B) on a block one-hour averaging period, for units
not equipped with CEMS or PEMS for CO.
(2) For units that inject urea or ammonia into the
exhaust stream for NOX control, ammonia
emissions must not exceed 10 ppmv at 3.0% O2,
dry, for boilers and process heaters; 15% O2,
dry, for stationary gas turbines (including duct burners used in turbine
exhaust ducts) and gas-fired lean-burn engines; 7.0% O2, dry, for incinerators; and 3.0% O2, dry, for all other units, based on:
(A) a block one-hour averaging period for units not
equipped with a CEMS or PEMS for ammonia; and
(B) a rolling 24-hour averaging period for units equipped
with CEMS or PEMS for ammonia.
(3) The correction of CO emissions to 3.0% O2, dry basis, in paragraph (1) of this subsection
does not apply to boilers and process heaters operating at less than
10% of maximum load and with stack O2 in
excess of 15% (i.e., hot-standby mode).
(4) The CO specifications in paragraph (1) of this
subsection do not apply to incinerators subject to the CO limits of
one of the following:
(A) §111.121 of this title (relating to Single-,
Dual-, and Multiple-Chamber Incinerators);
(B) §113.2072 of this title (relating to Emission
Limits) for hospital/medical/infectious waste incinerators; or
(C) 40 CFR Part 264 or 265, Subpart O, for hazardous
waste incinerators.
(d) Compliance flexibility.
(1) An owner or operator may use any of the following
alternative methods to comply with the NOX emission
specifications of this section:
(A) §117.423 of this title (relating to Source
Cap); or
(B) §117.9800 of this title (relating to Use of
Emission Credits for Compliance).
(2) Section 117.425 of this title is not an applicable
method of compliance with the NOX emission
specifications of this section.
(3) An owner or operator may petition the executive
director for an alternative to the CO or ammonia specifications of
this section in accordance with §117.425 of this title.
(e) Prohibition of circumvention.
(1) The maximum rated capacity used to determine the
applicability of the emission specifications in this section and the
initial compliance demonstration, monitoring, testing requirements,
and final control plan in §§117.435, 117.440, and 117.454
of this title (relating to Initial Demonstration of Compliance; Continuous
Demonstration of Compliance; and Final Control Plan Procedures for
Attainment Demonstration Emission Specifications) must be the greater
of the following:
(A) the maximum rated capacity as of December 31, 2000;
(B) the maximum rated capacity after December 31, 2000;
or
(C) the maximum rated capacity authorized by a permit
issued under Chapter 116 of this title (relating to Control of Air
Pollution by Permits for New Construction or Modification) after December
31, 2000.
(2) A unit's classification is determined by the most
specific classification applicable to the unit as of December 31,
2000. For example, a unit that is classified as a stationary gas-fired
engine as of December 31, 2000, but subsequently is authorized to
operate as a dual-fuel engine, is classified as a stationary gas-fired
engine for the purposes of this chapter.
(3) Changes after December 31, 2000, to a unit subject
to an emission specification in this section that result in increased
NOX emissions from a unit not subject
to an emission specification of this section, such as redirecting
one or more fuel or waste streams containing chemical-bound nitrogen
to an incinerator with a maximum rated capacity of less than 40 MMBtu/hr,
or a flare, are only allowed if:
(A) the increase in NOX emissions
at the unit not subject to this section is determined using a CEMS
or PEMS that meets the requirements of §117.440 of this title,
or through stack testing that meets the requirements of §117.435
of this title; and
(B) emission credits equal to the increase in NOX emissions at the unit not subject to this
section are obtained and used in accordance with §117.9800 of
this title.
(4) A source that met the definition of major source
on December 31, 2000, is always classified as a major source for purposes
of this chapter. A source that did not meet the definition of major
source (i.e., was a minor source, or did not yet exist) on December
31, 2000, but becomes a major source at any time after December 31,
2000, is from that time forward always classified as a major source
for purposes of this chapter.
(5) The availability under subsection (a)(14) of this
section of an emission specification for units with an annual capacity
factor of 0.0383 or less is based on the unit's status as of December
31, 2000. Reduced operation after December 31, 2000, cannot be used
to qualify for a more lenient emission specification under subsection
(a)(14) of this section than would otherwise apply to the unit.
(f) Operating restrictions. No person may start or
operate any stationary diesel or dual-fuel engine for testing or maintenance
of the engine between the hours of 6:00 a.m. and noon, except:
(1) for specific manufacturer's recommended testing
requiring a run of over 18 consecutive hours;
(2) to verify reliability of emergency equipment (e.g.,
emergency generators or pumps) immediately after unforeseen repairs.
Routine maintenance such as an oil change is not considered to be
an unforeseen repair; or
(3) firewater pumps for emergency response training
conducted from April 1 through October 31.
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