# National Emission Standards for Hazardous Air Pollutants for the Portland Cement Manufacturing Industry
> **Rule** · Direct final rule. · Published 2016-07-25 · Effective 2016-09-08 · 81 FR 48356
## Document
- **Document number:** 2016-17293
- **Category:** air-emissions
- **Federal Register citation:** 81 FR 48356
- **CFR reference:** 40 CFR 63
- **Publication date:** 2016-07-25
- **Effective date:** 2016-09-08
- **EPA docket:** EPA-HQ-OAR-2011-0817
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to amend the National Emission Standards for Hazardous Air Pollutants for the Portland Cement Manufacturing Industry. This direct final rule provides, for a period of 1 year, an additional compliance alternative for sources that would otherwise be required to use an HCl CEMS to demonstrate compliance with the HCl emissions limit. This compliance alternative is needed due to the current unavailability of a calibration gas used for quality assurance purposes. This direct final rule also restores regulatory text requiring the reporting of clinker production and kiln feed rates that was deleted inadvertently.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/07/25/2016-17293/national-emission-standards-for-hazardous-air-pollutants-for-the-portland-cement-manufacturing)
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