U.S. Code of Federal Regulations

Regulations most recently checked for updates: Mar 04, 2026

All TitlesTitle 40Chapter IPart 63Subpart NNNN - Subpart NNNN—National Emission Standards for Hazardous Air Pollutants: Surface Coating of Large Appliances

WHAT THIS SUBPART COVERS
§ 63.4080 - What is the purpose of this subpart?
§ 63.4081 - Am I subject to this subpart?
§ 63.4082 - What parts of my plant does this subpart cover?
§ 63.4083 - When do I have to comply with this subpart?

EMISSION LIMITATIONS
§ 63.4090 - What emission limits must I meet?
§ 63.4091 - What are my options for meeting the emission limits?
§ 63.4092 - What operating limits must I meet?
§ 63.4093 - What work practice standards must I meet?

GENERAL COMPLIANCE REQUIREMENTS
§ 63.4100 - What are my general requirements for complying with this subpart?
§ 63.4101 - What parts of the General Provisions apply to me?

NOTIFICATIONS, REPORTS, AND RECORDS
§ 63.4110 - What notifications must I submit?
§ 63.4120 -
§ 63.4121 - What are my electronic reporting requirements?
§ 63.4130 - What records must I keep?
§ 63.4131 - In what form and for how long must I keep my records?

COMPLIANCE REQUIREMENTS FOR THE COMPLIANT MATERIAL OPTION
§ 63.4140 - By what date must I conduct the initial compliance demonstration?
§ 63.4141 - How do I demonstrate initial compliance with the emission limitations?
§ 63.4142 - How do I demonstrate continuous compliance with the emission limitations?

COMPLIANCE REQUIREMENTS FOR THE EMISSION RATE WITHOUT ADD-ON CONTROLS OPTION
§ 63.4150 - By what date must I conduct the initial compliance demonstration?
§ 63.4151 - How do I demonstrate initial compliance with the emission limitations?
§ 63.4152 - How do I demonstrate continuous compliance with the emission limitations?

COMPLIANCE REQUIREMENTS FOR THE EMISSION RATE WITH ADD-ON CONTROLS OPTION
§ 63.4160 - By what date must I conduct initial performance tests and other initial compliance demonstrations?
§ 63.4161 - How do I demonstrate initial compliance?
§ 63.4162 - [Reserved]
§ 63.4163 - How do I conduct periodic performance tests and demonstrate continuous compliance with the emission limitations?
§ 63.4164 - What are the general requirements for performance tests?
§ 63.4165 - How do I determine the emission capture system efficiency?
§ 63.4166 - How do I determine the add-on control device emission destruction or removal efficiency?
§ 63.4167 - How do I establish the emission capture system and add-on control device operating limits during performance tests?
§ 63.4168 - What are the requirements for continuous parameter monitoring system installation, operation, and maintenance?

OTHER REQUIREMENTS AND INFORMATION
§ 63.4180 - Who implements and enforces this subpart?
§ 63.4181 - What definitions apply to this subpart?
Appendix - Table 1 to Subpart NNNN of Part 63—Operating Limits if Using the Emission Rate With Add-On Controls Option
Appendix - Table 2 to Subpart NNNN of Part 63—Applicability of General Provisions to Subpart NNNN
Appendix - Table 3 to Subpart NNNN of Part 63—Default Organic HAP Mass Fraction for Solvents and Solvent Blends
Appendix - Table 4 to Subpart NNNN of Part 63—Default Organic HAP Mass Fraction for Petroleum Solvent Groups a
Appendix - Table 5 to Subpart NNNN of Part 63—List of Hazardous Air Pollutants That Must Be Counted Toward Total Organic HAP Content if Present at 0.1 Percent or More by Mass
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