# National Emission Standards for Hazardous Air Pollutants: Carbon Black Production and Cyanide Chemicals Manufacturing Residual Risk and Technology Reviews, and Carbon Black Production Area Source Technology Review
> **Rule** · Final rule. · Published 2021-11-19 · Effective 2021-11-19 · 86 FR 66096
## Document
- **Document number:** 2021-24204
- **Category:** air-emissions
- **Federal Register citation:** 86 FR 66096
- **CFR reference:** 40 CFR 63
- **Publication date:** 2021-11-19
- **Effective date:** 2021-11-19
- **EPA docket:** EPA-HQ-OAR-2020-0505, EPA-HQ-OAR-2020-0532
## Abstract

This action finalizes the residual risk and technology reviews (RTR) conducted for the Carbon Black Production and Cyanide Chemicals Manufacturing major source categories, and the technology review conducted for Carbon Black Production area sources, regulated under National Emission Standards for Hazardous Air Pollutants (NESHAP). In addition, we are taking final action to add new emissions standards for the Carbon Black Production and Cyanide Chemicals Manufacturing major source categories to address hazardous air pollutant (HAP) emissions not previously covered by these NESHAP. The EPA is also finalizing amendments for both source categories that address the startup, shutdown, and malfunction (SSM) provisions of the existing standards, and require electronic reporting of certain notifications, performance test results, and semiannual reports.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/11/19/2021-24204/national-emission-standards-for-hazardous-air-pollutants-carbon-black-production-and-cyanide)
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