# Approval and Promulgation of State Implementation Plan; Minnesota
> **Rule** · Direct final rule. · Published 1999-08-16 · Effective 1999-10-15 · 64 FR 44408
## Document
- **Document number:** 99-21012
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 44408
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-08-16
- **Effective date:** 1999-10-15
- **State:** MN
- **EPA docket:** MN 48-01-7273a
## Abstract

We are approving a December 31, 1998, request from the Minnesota Pollution Control Agency (MPCA) for new air pollution control requirements for the Minnesota sulfur dioxide (SO<INF>2</INF>) State Implementation Plan (SIP) for Marathon Ashland Petroleum LLC (Marathon). These requirements were submitted in the form of an Administrative Order (Order) and include revisions associated with the addition of a new stack, revised emission limits for numerous sources, and other changes. The revisions result in an overall decrease in allowable SO<INF>2</INF> emissions from the facility. The new requirements have been evaluated through a computerized modeling analysis and have shown that they will attain and maintain the National Ambient Air Quality Standard (NAAQS) for SO<INF>2</INF>.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/08/16/99-21012/approval-and-promulgation-of-state-implementation-plan-minnesota)
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