# Air Plan Limited Approval and Limited Disapproval; California; Eastern Kern Air Pollution Control District
> **Rule** · Final rule. · Published 2023-06-05 · Effective 2023-07-05 · 88 FR 36479
## Document
- **Document number:** 2023-11850
- **Category:** air-emissions
- **Federal Register citation:** 88 FR 36479
- **CFR reference:** 40 CFR 52
- **Publication date:** 2023-06-05
- **Effective date:** 2023-07-05
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2023-0059
## Abstract

The Environmental Protection Agency (EPA) is finalizing a limited approval and limited disapproval of a revision to the Eastern Kern Air Pollution Control District (EKAPCD or "District") portion of the California State Implementation Plan (SIP). This revision concerns emissions of oxides of nitrogen (NO<INF>X</INF>) from Portland Cement Kilns. Under the authority of the Clean Air Act (CAA or the Act), this action simultaneously approves a local rule that regulates these emission sources and directs California to correct rule deficiencies. We are finalizing a limited approval of a local rule that regulates these emission sources because the rule would strengthen the current SIP-approved version of EKAPCD's Portland cement kiln rule. We are finalizing a limited disapproval of this revision due to the presence of exemptions for periods of startup, shutdown, and malfunction (breakdown), which are inconsistent with CAA requirements.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/06/05/2023-11850/air-plan-limited-approval-and-limited-disapproval-california-eastern-kern-air-pollution-control)
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