Environmental Protection Agency Docket EPA-R05-OAR-2017-0081 Proposed Rule

2017-14213: Air Plan Approval; Wisconsin; Site-Specific Sulfur Dioxide Requirements for USG Interiors, LLC

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Summary

The Environmental Protection Agency (EPA) is proposing to approve under the Clean Air Act a State Implementation Plan (SIP) revision submitted by Wisconsin on January 31, 2017, and supplemented on March 20, 2017. This SIP submittal consists of Wisconsin Administrative Order AM-16-01, which imposes a requirement for a taller cupola exhaust stack, a sulfur dioxide (SO<INF>2</INF>) emission limit in conjunction with a minimum cupola stack flue gas flow rate, and associated requirements on the mineral wool production process at the USG Interiors LLC facility located in Walworth, Wisconsin (USG- Walworth). Wisconsin submitted this SIP revision to enable the area near USG-Walworth to qualify for being designated "attainment" of the 2010 primary SO<INF>2</INF> National Ambient Air Quality Standards, a matter that will be addressed in a separate future rulemaking. EPA is approving AM-16-01 into the Wisconsin SIP, which makes the AM-16-01 requirements federally enforceable.

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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