This subpart establishes national emission standards for hazardous air pollutants (NESHAP) for pushing, soaking, quenching, battery stacks, heat and/or nonrecovery (HNR) heat recovery steam generator (HRSG) main stacks, and HNR HRSG bypass/waste heat stacks at facilities that produce coke in coke oven batteries and facilities that recover heat from coke oven gas. This subpart also establishes requirements to demonstrate initial and continuous compliance with all applicable emission limitations, work practice standards, and operation and maintenance requirements in this subpart.