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The Missouri Department of Natural Resources filed the following proposed rulemakings with the secretary of state's office and comments are being accepted as noted at the end of the proposed rulemaking under the Notice of Public Hearing and Notice to Submit Comments heading. To submit comments electronically, use the links below the rule or to submit written comments see the address below.

10 CSR 10-6.220 Restriction of Emission of Visible Air Contaminants
This amendment will remove a statement from the compliance and performance testing provisions that does not meet Clean Air Act requirements.  This statement could be interpreted as allowing for exemptions from federally enforceable emission limits through the state director’s discretion.  This action was initiated by a petition received by the U.S. Environmental Protection Agency (EPA) concerning the treatment of excess emissions by sources during startup, shutdown, or malfunction conditions.  EPA responded to the petition by finalizing a State Implementation Plan (SIP) Call that requires us to fix this deficiency in the rule.  At the same time, the following exemptions are being added to reduce regulatory burden and eliminate duplicative requirements:

    • power plants complying with Mercury and Air Toxics Standards (MATS)
    • certain sources subject to the federal boiler Maximum Achievable Control Technology (MACT) regulations
    • fugitive emissions subject to 10 CSR 10-6.170, and
    • units designed to burn certain gaseous fuels such as natural gas.

Additional clarification and maintenance changes are also being incorporated into this rulemaking.

Proposed Rulemaking - published in May 2, 2016 Missouri Register

Additional Information

Technical support document

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Submit written comments

Comments on this rulemaking will be accepted through close of business, Aug. 4, 2016.

Submit written comments about any rule development to:

Chief, Air Quality Planning Section
Missouri Department of Natural Resources
Air Pollution Control Program
P.O. Box 176
Jefferson City, MO 65102-0176