Approval of California Air Plan Revisions, Northern Sierra Air Quality Management District

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The Environmental Protection Agency (EPA) is proposing to approve a revision to the Northern Sierra Air Quality Management District (NSAQMD) portion of the California State Implementation Plan (SIP). This revision concerns emissions of particulate matter (PM) from wood burning devices. We are proposing to approve a local 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.