Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 117 - CONTROL OF AIR POLLUTION FROM NITROGEN COMPOUNDS › Subchapter B - COMBUSTION CONTROL AT MAJOR INDUSTRIAL, COMMERCIAL, AND INSTITUTIONAL SOURCES IN OZONE NONATTAINMENT AREAS › Division 1 - BEAUMONT-PORT ARTHUR OZONE NONATTAINMENT AREA MAJOR SOURCES › Section 117.123 - Source Cap

Current through Reg. 49, No. 28; July 12, 2024
(a) An owner or
					 operator may achieve compliance with the nitrogen oxides
					 (NOX) emission specifications of §
											117.105
					 of this title (relating to Emission Specifications for Reasonably Available
					 Control Technology (RACT)) or §
											117.110
					 of this title (relating to Emission Specifications for Attainment
					 Demonstration), by achieving equivalent NOX emission
					 reductions obtained by compliance with a source cap emission limitation in
					 accordance with the requirements of this section. Each equipment category at a
					 source whose individual emission units would otherwise be subject to the
					 NOX emission specifications of §
											117.105
					 or §
											117.110
					 of this title may be included in the source cap. Any equipment category
					 included in the source cap must include all emission units belonging to that
					 category. Equipment categories include, but are not limited to, the following:
					 steam generation, electrical generation, and units with the same product
					 outputs, such as ethylene cracking furnaces. All emission units not included in
					 the source cap must comply with the requirements of §
											117.105
					 or §
											117.110
					 of this title, or §
											117.115
					 of this title (relating to Alternative Plant-Wide Emission
					 Specifications).
(b) The source cap
					 allowable mass emission rate must be calculated as follows.
(1) A rolling 30-day average emission cap
					 must be calculated for all emission units included in the source cap using the
					 following equation.
Attached
						Graphic
(2) A
					 maximum daily cap must be calculated for all emission units included in the
					 source cap using the following equation.
Attached
						Graphic
(3) Each
					 emission unit included in the source cap is subject to the requirements of both
					 paragraphs (1) and (2) of this subsection at all times.
(4) The owner or operator at its option may
					 include any of the entire classes of exempted units listed in §
												117.115(f)
					 of this title in a source cap. For compliance with §117.105(a) - (d) of
					 this title, such units are required to reduce emissions available for use in
					 the cap by an additional amount calculated in accordance with the United States
					 Environmental Protection Agency's proposed Economic Incentive Program rules for
					 offset ratios for trades between RACT and non-RACT sources, as published in the
					 February 23, 1993,
Federal Register
(58 FR 11110).
(5) For stationary internal combustion
					 engines, the source cap allowable emission rate must be calculated in pounds
					 per hour using the procedures specified in §
												117.115(g)(2)
					 of this title.
(6) For stationary
					 gas turbines, the source cap allowable emission rate must be calculated in
					 pounds per hour using the procedures specified in §
												117.115(g)(3)
					 of this title.