Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 117 - CONTROL OF AIR POLLUTION FROM NITROGEN COMPOUNDS › Subchapter C - COMBUSTION CONTROL AT MAJOR UTILITY ELECTRIC GENERATION SOURCES IN OZONE NONATTAINMENT AREAS › Division 3 - HOUSTON-GALVESTON-BRAZORIA OZONE NONATTAINMENT AREA UTILITY ELECTRIC GENERATION SOURCES › Section 117.1240 - Continuous Demonstration of Compliance

Current through Reg. 49, No. 28; July 12, 2024
(a) Nitrogen oxides
					 (NOX) monitoring. The owner or operator of each unit
					 subject to this division (relating to Houston-Galveston-Brazoria Ozone
					 Nonattainment Area Utility Electric Generation Sources), shall install,
					 calibrate, maintain, and operate a continuous emissions monitoring system
					 (CEMS), predictive emissions monitoring system (PEMS), or other system
					 specified in this section to measure NOX on an
					 individual basis. Each NOX monitor (CEMS or PEMS) is
					 subject to the relative accuracy test audit relative accuracy requirements of
					 40 Code of Federal Regulations (CFR) Part 75, Appendix B, Figure 2, except the
					 concentration options (parts per million by volume (ppmv) and pounds per
					 million British thermal units) therein do not apply. Each
					 NOX monitor must meet either the relative accuracy
					 percent requirement of 40 CFR Part 75, Appendix B, Figure 2, or an alternative
					 relative accuracy requirement of ± 2.0 ppmv from the reference method
					 mean value.
(b) Carbon monoxide
					 (CO) monitoring. The owner or operator shall monitor CO exhaust emissions from
					 each unit subject to this division using one or more of the methods in §
											117.8120
					 of this title (relating to Carbon Monoxide (CO) Monitoring).
(c) Ammonia monitoring requirements. The
					 owner or operator of units that are subject to the ammonia emission
					 specification in §
											117.1210(b)(2)
					 of this title (relating to Emission Specifications for Attainment
					 Demonstration) shall comply with the ammonia monitoring requirements of §
											117.8130 of
					 this title (relating to Ammonia Monitoring).
(d) CEMS requirements.
(1) For units subject to §
												117.1205
					 of this title (relating to Emission Specifications for Reasonably Available
					 Control Technology (RACT)), any CEMS required by this section must comply with
					 the requirements of §
												117.8110(a)
					 of this title (relating to Emission Monitoring System Requirements for Utility
					 Electric Generation Sources).
(2)
					 The owner or operator of any unit subject to §
												117.1210
					 of this title shall comply with the following:
(A) any CEMS required by this section must
					 comply with the requirements of §
													117.8110(a)(1)
					 of this title;
(B) all bypass
					 stacks must be monitored in order to quantify emissions directed through the
					 bypass stack;
(C) one CEMS may be
					 shared among units, provided:
(i) the exhaust
					 stream of each stack is analyzed separately; and
(ii) the CEMS meets the certification
					 requirements of §
														117.8110(a)(1)
					 of this title for each stack while the CEMS is operating in the time-shared
					 mode; and
(D) exhaust
					 streams of units that vent to a common stack do not need to be analyzed
					 separately.