Environmental Protection Agency Docket EPA-R09-OAR-2020-0173 Proposed Rule

2020-10587: Limited Approval, Limited Disapproval of Arizona Air Plan Revisions, Hayden Area; Sulfur Dioxide Control Measures-Copper Smelters

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Summary

The Environmental Protection Agency (EPA) is proposing a limited approval and limited disapproval of revisions to the Arizona State Implementation Plan (SIP). This revision concerns sulfur dioxide (SO<INF>2</INF>) emissions from the primary copper smelter in Hayden, Arizona. We are proposing action on a local rule submitted by the Arizona Department of Environmental Quality (ADEQ) that regulates these emissions under the Clean Air Act (CAA or the Act). We are taking comments on this proposal and plan to follow with a final action.

The agency’s own summary, as published.

What this changes

Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.

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