The owner or operator shall install, operate, calibrate, and maintain a continuous emissions monitoring system (CEMS) according to the manufacturer's specifications to continuously monitor the sulfur dioxide (SO             2            ) emissions in accordance with the requirements of 40 CFR §60.13, 40 CFR 60, Appendix B, Performance Specification 2 and 6, for SO             2            , and Appendix F, quality assurance procedures:     
       (1) monitor the pounds per hour of SO               2              emitted from Kiln Scrubber Stack (EPN E-3);      
       (2) monitor continuously the temperature and velocity of exhaust gases at the outlet of the stack;      
       (3) provide an appropriate quality assurance and quality control process for all continuous monitoring data collected in accordance with requirements in this subsection that is validated for at least 95% of the time that the monitored emission source operates; 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 source is in operation; and      
       (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 and the replacement of parametric monitoring with direct emissions monitoring with a CEMS 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.      
     Source Note:        The provisions of this §112.303 adopted to be effective October 27, 2022, 47 TexReg 6985