Approval of California Air Plan Revisions; Anti-Idling Regulations

The Environmental Protection Agency (EPA) is proposing to approve a revision to the California State Implementation Plan (SIP). This revision concerns emissions of volatile organic compounds (VOCs), oxides of nitrogen (NOX) and particulate matter (PM) from the idling of diesel-powered trucks. We are proposing to approve portions of a state rule to regulate these emission sources under the Clean Air Act (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.