# Approval and Promulgation of Implementation Plan; California; Calaveras County, Chico (Butte County), San Francisco Bay Area and San Luis Obispo County (Eastern San Luis Obispo) Base Year Emission Inventories for the 2008 Ozone Standards
> **Rule** · Direct final rule. · Published 2016-10-19 · Effective 2016-12-19 · 81 FR 71997
## Document
- **Document number:** 2016-25164
- **Category:** air-emissions
- **Federal Register citation:** 81 FR 71997
- **CFR reference:** 40 CFR 52
- **Publication date:** 2016-10-19
- **Effective date:** 2016-12-19
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2016-0499
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to approve revisions to the California State Implementation Plan (SIP) concerning the base year emission inventories (EIs) for four areas designated as nonattainment areas (NAAs) for the 2008 ozone National Ambient Air Quality Standards (2008 ozone NAAQS). The subject areas include Calaveras County, Chico (Butte County), San Francisco Bay Area and San Luis Obispo (Eastern San Luis Obispo). We are approving these revisions under the Clean Air Act (CAA or "the Act").

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/10/19/2016-25164/approval-and-promulgation-of-implementation-plan-california-calaveras-county-chico-butte-county-san)
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