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National Emission Standards for Hazardous Air Pollutants: Chemical Manufacturing Area Sources Technology Review

FR Abstract
The Environmental Protection Agency (EPA) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Chemical Manufacturing Area Source (CMAS) categories pursuant to a technology review under Clean Air Act (CAA) section 112(d)(6). Specifically, the EPA is finalizing new leak detection and repair (LDAR) requirements for equipment leaks and heat exchange systems in organic hazardous air pollutant (HAP) service. In addition, the EPA is taking final action to add standards for pressure relief devices (PRDs) and pressure vessels; require electronic reporting for notification of compliance status (NOCS), performance test reports, and periodic reports; and require continuous performance testing of non-flare air pollution control devices (APCD). The EPA is not finalizing the proposed area source category for chemical manufacturing with ethylene oxide (EtO) or related standards at this time.
Incorporation
FR Document Number
2026-06304
Federal Register Volume
91
Federal Register Year
2026-04-01
Federal Register Start Page
16502
Federal Register End Page
16538
CFR Citation
40 CFR 63
FR Citation
91 FR 16502
CFR title
40
CFR Part
63
Document Number
EPA Method 29
Document Edition
2017
Standard Title
Metals Emissions from Stationary Sources
Excerpts
in § 63.11410(j)(1). As an alternative to conducting a performance test using Method 5 or 5D to determine the concentration of PM, you may use Method 29 of 40 CFR part 60, appendix A-8 of this chapter to determine the concentration of HAP metals. ASTM D6784-24 (incorporated by reference, see § 63.14) may also be used in lieu of Method 29, if the target compound is mercury and concentrations are approximately 0.5 to 100 micrograms per cubic meter. You have demonstrated compliance if the overall reduction of either HAP metals or total PM is equal
Record Source
www.federalregister.gov