# Approval and Promulgation of Implementation Plans; California; South Coast; Contingency Measures for 1997 PM2.5 Standards
> **Rule** · Final rule. · Published 2013-10-29 · Effective 2013-11-29 · 78 FR 64402
## Document
- **Document number:** 2013-25182
- **Category:** air-emissions
- **Federal Register citation:** 78 FR 64402
- **CFR reference:** 40 CFR 52
- **Publication date:** 2013-10-29
- **Effective date:** 2013-11-29
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2013-0384
## Abstract

EPA is approving a State implementation plan (SIP) revision submitted by California to address Clean Air Act (CAA) contingency measure requirements for the 1997 annual and 24-hour national ambient air quality standard (NAAQS) for fine particulate matter (PM<INF>2.5</INF>) in the Los Angeles-South Coast Air Basin (South Coast). Approval of this SIP revision terminates the sanctions clocks and a federal implementation plan (FIP) clock that were triggered by EPA's partial disapproval of a related SIP submission on November 5, 2011.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/10/29/2013-25182/approval-and-promulgation-of-implementation-plans-california-south-coast-contingency-measures-for)
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