# Air Plan Approval; Wisconsin; Site-Specific Sulfur Dioxide Requirements for USG Interiors, LLC
> **Rule** · Direct final rule. · Published 2017-07-07 · Effective 2017-09-05 · 82 FR 31458
## Document
- **Document number:** 2017-14212
- **Category:** air-emissions
- **Federal Register citation:** 82 FR 31458
- **CFR reference:** 40 CFR 52
- **Publication date:** 2017-07-07
- **Effective date:** 2017-09-05
- **State:** WI
- **EPA docket:** EPA-R05-OAR-2017-0081
## Abstract

The Environmental Protection Agency (EPA) is approving, under the Clean Air Act (CAA), 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 (NAAQS), 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/07/07/2017-14212/air-plan-approval-wisconsin-site-specific-sulfur-dioxide-requirements-for-usg-interiors-llc)
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