# Disapproval of California State Implementation Plan Revisions, Monterey Bay Unified Air Pollution Control District
> **Rule** · Final rule. · Published 2010-06-30 · Effective 2010-07-30 · 75 FR 37727
## Document
- **Document number:** 2010-15759
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 37727
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-06-30
- **Effective date:** 2010-07-30
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2009-0080
## Abstract

EPA is finalizing disapproval of a revision to the Monterey Bay Unified Air Pollution Control District (MBUAPCD) portion of the California State Implementation Plan (SIP). This action was proposed in the Federal Register on March 22, 2010. This revision concerns opacity standards related to multiple pollutants, including particulate matter (PM) emissions, from a wide variety of sources. Under authority of the Clean Air Act as amended in 1990 (CAA or the Act), this action identifies a deficiency that precludes approval of this SIP revision.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/06/30/2010-15759/disapproval-of-california-state-implementation-plan-revisions-monterey-bay-unified-air-pollution)
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