Section 112.113 - Monitoring Requirements(a) For each block one-hour period of operation, the owner or operator shall calculate total SO2 emissions generated by each production unit using the following equation. Attached Graphic
(b) The owner or operator shall calculate the SO2 emissions from Incinerator + HRSG (EPN 13A), Dryer Stack Units Numbers 1 and 2 (EPN 7A), Dryer Stack Units Number 3 (EPN 12A), and Flare 4 (EPN FLARE 4) for each block one-hour period of operation during which emissions of SO2 are emitted from the emission points listed in this subsection, using the following equations. (1) for the Incinerator + HRSG (EPN 13A), calculate the emission rate using the following equation). Attached Graphic
(2) For Dryer Stack Units No. 1 & 2 (EPN 7A), calculate the emission rate using the following equation. Attached Graphic
(3) For Flare 4 (EPN Flare 4), calculate the emission rate using the following equation. Attached Graphic
(4) For Dryer Stack Unit No. 3 (EPN 12A), calculate the emission limit using the following equation. Attached Graphic
(c) The owner or operator shall install, calibrate, maintain, and operate one or more totalizing fuel flow meters, consistent with manufacturer's specifications, with an accuracy of ±5%, to continuously measure the feed rate of carbon black oil feedstock supplied to each carbon black production unit.(d) The owner or operator shall install, calibrate, maintain, and operate totalizing tail gas flow meters, consistent with manufacturer's specifications, with an accuracy of ±5%, to continuously measure the volumetric flow rate of tail gas to each tail gas combustion device covered under § 112.112 of this title (relating to Control Requirements). Tail gas combustion devices include the dryers, Incinerator + HRSG, and Flare 4.(e) The owner or operator shall use a continuous data acquisition system that continuously measures, calculates, and records the following quantities: (1) the volumetric flow rate of tail gas to the Incinerator + HRSG (EPN 13A) and Flare 4 (EPN Flare 4) from each production unit;(2) the volumetric flow rate of tail gas to the carbon black dryers in each production unit;(3) the total volumetric flow rate of tail gas from each production unit;(4) for each production unit, the ratio of quantities in paragraphs (1) and (3) of this subsection, identified as "& pgr;incin", which is the split coefficient for the Incinerator + HRSG and for Flare 4 used in the calculations in subsection (b) of this section; and(5) for each production unit, the ratio of quantities in paragraphs (2) and (3) of this subsection, identified as "& pgr;dryer", which is the split coefficient for the dryers used in the calculations in subsection (b) of this section.(f) The owner or operator shall install, calibrate, maintain, and operate the continuous data acquisition system specified in subsection (e) of this section in accordance with the manufacturer's recommended procedures.(g) The owner or operator shall measure twice daily (at least four hours apart) the sulfur content by weight of the carbon black oil in the feed to each production unit according to the requirements of § 112.115(b) of this title (relating to Approved Test Methods).(h) For each grade of carbon black produced, the owner or operator shall measure daily the sulfur content by weight of the carbon black produced by each carbon black production unit in accordance with § 112.115(c) of this title.(i) The owner or operator shall determine the amount of each grade of carbon black produced by each carbon black production unit each hour.(j) In lieu of the monitoring requirements of §112.113(a) - (i) of this section, the owner or operator may install, calibrate, and maintain a continuous emissions monitoring system to monitor exhaust sulfur dioxide (SO2) from Incinerator + HRSG (EPN 13A), Dryer Stack Units Nos. 1 & 2 (EPN 7A), or Dryer Stack Units No. 3 (EPN 12A) in accordance with the requirements of 40 Code of Federal Regulations (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. If a CEMS is not used to monitor the emissions from all three EPNs, monitoring requirements in §112.113(a) - (i) continue to apply for EPNs without a CEMS.(k) Continuous monitoring data collected in accordance with requirements in this section 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 judgement, to obtain all missing or invalidated monitoring data for the remaining period the monitored emission point has emissions.(l) 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.30 Tex. Admin. Code § 112.113
Adopted by Texas Register, Volume 47, Number 42, October 21, 2022, TexReg 7044, eff. 10/27/2022