(a) Monitoring requirements. The owner or operator shall continuously monitor, at a point prior to the manifold that directs gases to the Acid Gas Flare (EPN FLR1) or Acid Gas incinerator (EPN INCIN1), the gases routed to Acid Gas Flare (EPN FLR1) or Acid Gas Incinerator (EPN INCIN1) by using the following:
  (1) monitor at a point the sulfur content of the gas stream as follows:
    (A) using a separate dedicated analyzer capable of accurately measuring and recording total sulfur (including sulfur dioxide (SO2), hydrogen sulfide (H2S), and organic sulfur compounds levels) with an accuracy of ±5% on a continuous basis, the sulfur concentration must be determined in accordance 40 Code of Federal Regulations (CFR) §60.107a(e)(1) regardless of whether these requirements are otherwise applicable or exempt the flare or incinerator, and hourly SO2 emissions must be determined using the following equation; or
Attached Graphic
    (B) using a separate dedicated analyzer capable of accurately measuring and recording H2S to an accuracy of ±5% on a continuous basis, determine the H2S concentration in the flared gas stream, derive an inlet flare or incinerator gas total sulfur concentration for each monitored hourly H2S concentration in accordance 40 CFR §60.107a(e)(2) methodology regardless of whether these requirements are otherwise applicable or exempt the flare or incinerator, and calculate the SO2 emissions from the flare and the incinerator for each operating hour that either is operated using the following equation:
Attached Graphic
    (C) a totalizing gas flow meter with an accuracy of ±5% that is installed, calibrated, maintained, and operated according to per the manufacturer's specifications directions to continuously measure and record the volume of gas directed to the Acid Gas Flare (EPN FLR1) or Acid Gas Incinerator (EPN INCIN1); and
    (D) monitor the temperature of gases routed to the flare or incinerator using a temperature measurement device with an accuracy of ±1%; the inlet flare gas temperature measurement device must be installed, calibrated, maintained, and operated according to the manufacturer's recommendations and specifications.
  (2) In lieu of the monitoring requirements of §112.213(a)(1) of this subsection, the owner or operator may install, calibrate, and maintain a continuous emissions monitoring system to monitor exhaust SO2 from the Acid Gas Incinerator (EPN INCIN1) in accordance with the requirements of 40 CFR §60.13, 40 CFR Part 60, Appendix B, Performance Specification 2 and 6, for SO2, and 40 CFR Part 60, Appendix F, quality assurance procedures;
  (3) Continuous monitoring data collected in accordance with requirements in this subsection must undergo an appropriate quality assurance and quality control process and be validated for at least 95% of the time that the monitored emission point has emissions; an owner or operator must utilize an appropriate data substitution process based on the most accurate methodology available, which is at least equivalent to engineering judgment, to obtain all missing or invalidated monitoring data for the remaining period the monitored emission point has emissions.
  (4) Minor modifications to monitoring methods may be approved by the executive director. Monitoring methods other than those specified in this section may be used if approved by the executive director and validated by 40 CFR Part 63, Appendix A, Test Method 301. For the purposes of this subsection, substitute "executive director" in each place that Test Method 301 references "administrator." These validation procedures may be waived by the executive director or a different protocol may be granted for site-specific applications. Minor modifications that may be approved under this subsection include increases in the frequency of monitoring provided appropriate quality assurance control, accuracy specifications, and data validation requirements are specified and no less stringent than monitoring requirements for a comparable EPN in this subchapter.
(b) Testing requirements.
  (1) The owner of operator shall perform initial testing for monitoring devices required by subsection (a) of this section if documentation is not available to demonstrate initial tests have been conducted, as well as all subsequent testing, in accordance with the manufacturer's specifications to ensure that the required monitors are calibrated and function properly by the compliance date in §112.218 of this title (relating to Compliance Schedules).
  (2) The owner or operator shall conduct initial performance testing by the compliance date in §112.218 of this title. During performance testing, the owner or operator shall operate the source at the maximum rated capacity, or as near thereto as practicable. The owner or operator shall conduct additional performance tests on the incinerator at least every five years after the compliance date to ensure the accuracy of the monitors for the gas stream sent to the incinerator or flare.
  (3) The owner or operator shall conduct additional performance testing, if requested by the executive director, in compliance with 40 CFR §60.104a to demonstrate compliance with applicable emission limits or standards. The notification requirements of 40 CFR §60.8(d) apply to each initial performance test and to each subsequent performance test required by the executive director.
  (4) All performance tests must be conducted using test methods allowed in §112.213(c).
(c) Approved test methods.
  (1) Tests required under paragraph (b) of this section must be conducted using the test methods in 40 CFR Part 60, Appendices A-1 through A-8 and Appendix B or other methods as specified in this section, except as provided in §60.8(b).
  (2) Sulfur dioxide in exhaust gases from the incinerator during testing must be determined using United States Environmental Protection Agency (EPA) Test Method 6 or 6C (40 CFR, Part 60, Appendix A).
  (3) Alternate test methods as approved by the executive director and the EPA may be used.

Source Note: The provisions of this §112.213 adopted to be effective October 27, 2022, 47 TexReg 6985