# Quality Assurance Requirements for Continuous Opacity Monitoring Systems at Stationary Sources
> **Rule** · Final rule. · Published 2014-05-16 · Effective 2014-11-12 · 79 FR 28439
## Document
- **Document number:** 2014-11226
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 28439
- **CFR reference:** 40 CFR 60
- **Publication date:** 2014-05-16
- **Effective date:** 2014-11-12
- **EPA docket:** EPA-HQ-OAR-2010-0873
## Abstract

This action promulgates quality assurance and quality control (QA/QC) procedures (referred to as Procedure 3) for continuous opacity monitoring systems (COMS) used to demonstrate continuous compliance with opacity standards specified in new source performance standards (NSPS) issued by the EPA pursuant to section 111(b) of the Clean Air Act (CAA), Standards of Performance for New Stationary Sources.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/05/16/2014-11226/quality-assurance-requirements-for-continuous-opacity-monitoring-systems-at-stationary-sources)
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