# Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation
> **Rule** · Notice of extension of comment period. · Published 2010-05-14 · Effective 2010-04-15 · 75 FR 27191
## Document
- **Document number:** 2010-11578
- **Category:** other
- **Federal Register citation:** 75 FR 27191
- **CFR reference:** 40 CFR 51
- **Publication date:** 2010-05-14
- **Effective date:** 2010-04-15
- **EPA docket:** EPA-HQ-OAR-2003-0064, FRL-9151-3
## Abstract

The EPA is announcing an extension of the public comment period on our proposed reconsideration of the Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NSR): Aggregation (April 15, 2010). The EPA is extending the comment period that originally closed on May 17, 2010, by an additional 30 days. The comment period will now close on June 16, 2010. The EPA is extending the comment period because of the requests we received, which are contained in the docket for this rulemaking.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/05/14/2010-11578/prevention-of-significant-deterioration-psd-and-nonattainment-new-source-review-nsr-aggregation)
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