Air Quality State Implementation Plans; Approvals and Promulgations: California; Opacity Testing of Heavy-Duty Diesel Vehicles
air-emissions · Rule · Published 2022-05-10 · Effective 2022-06-09 · CA · 87 FR 27949
Document
Document number
2022-09727
Federal Register citation
87 FR 27949
CFR reference
40 CFR 52
Type
Rule
Action
Final rule.
Category
air-emissions
Publication date
2022-05-10
Effective date
2022-06-09
State
CA
EPA docket
EPA-R09-OAR-2021-0452
Abstract
The Environmental Protection Agency (EPA) is taking final action to approve a revision to the California State Implementation Plan (SIP) concerning particulate matter (PM) emissions from heavy-duty (HD) diesel vehicles. We are approving state rules that regulate PM emission sources under the Clean Air Act (CAA or the Act).