Emission Limits and Compliance Requirements for Metal HAP Process Vents

As required in § 63.11496(f), you must comply with the requirements for metal HAP process vents as shown in the following table. Table 4 to Subpart VVVVVV of Part 63—Emission Limits and Compliance Requirements for Metal HAP Process Vents [As required in § 63.11496(f), you must comply with the requirements for metal HAP process vents as shown in the following table.] For * * * You must * * * Except * * * Each CMPU with total metal HAP emissions ≥400 lb/yr Reduce collective uncontrolled emissions of total metal HAP emissions by ≥95 percent by weight by routing emissions from a sufficient number of the metal HAP process vents through a closed vent system to any combination of control devices, according to the requirements of § 63.11496(f)(3), (4), or (5) Not applicable. [91 FR 16534, Apr. 1, 2026]