# Finding of Failure To Submit State Implementation Plan Submissions for the 2012 Fine Particulate Matter National Ambient Air Quality Standards; California; Los Angeles-South Coast Air Basin > **Rule** · Final rule. · Published 2023-05-26 · Effective 2023-06-26 · 88 FR 34093 ## Document - **Document number:** 2023-11317 - **Category:** air-emissions - **Federal Register citation:** 88 FR 34093 - **CFR reference:** 40 CFR 52 - **Publication date:** 2023-05-26 - **Effective date:** 2023-06-26 - **State:** CA - **EPA docket:** EPA-R09-OAR-2023-0261 ## Abstract The Environmental Protection Agency (EPA) is taking final action to find that California has failed to submit state implementation plan (SIP) elements required under the Clean Air Act (CAA or "Act") to implement the 2012 national ambient air quality standards (NAAQS) for fine particulate matter (PM2.5) in the Los Angeles-South Coast Air Basin ("South Coast"). California was required to submit by June 9, 2022, a SIP submission that meets the Serious area plan requirements for a base year emissions inventory and best available control measures (BACM). The State submitted the required SIP elements, but subsequently withdrew its submission. If the EPA has not affirmatively found that the State has submitted a complete SIP to correct these deficiencies within 18 months of this finding, the offset sanction will apply in the area. If within six additional months the EPA has still not affirmatively determined that the State has submitted a complete SIP to correct the deficiencies, the highway funding sanction will apply in the area. No later than two years after the EPA makes this finding, if the State has not submitted and the EPA has not approved each of the required SIP elements, the EPA must promulgate a federal implementation plan (FIP) to address the remaining requirements. ## Source - [Federal Register document](https://www.federalregister.gov/documents/2023/05/26/2023-11317/finding-of-failure-to-submit-state-implementation-plan-submissions-for-the-2012-fine-particulate) --- *AI Analytics · CC0 1.0*