U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 40Chapter IPart 63Subpart QQQQ - Subpart QQQQ—National Emission Standards for Hazardous Air Pollutants: Surface Coating of Wood Building Products

WHAT THIS SUBPART COVERS
§ 63.4680 - What is the purpose of this subpart?
§ 63.4681 - Am I subject to this subpart?
§ 63.4682 - What parts of my plant does this subpart cover?
§ 63.4683 - When do I have to comply with this subpart?

EMISSION LIMITATIONS
§ 63.4690 - What emission limits must I meet?
§ 63.4691 - What are my options for meeting the emission limits?
§ 63.4692 - What operating limits must I meet?
§ 63.4693 - What work practice standards must I meet?
§ 63.4700 - What are my general requirements for complying with this subpart?
§ 63.4701 - What parts of the General Provisions apply to me?
§ 63.4710 - What notifications must I submit?
§ 63.4720 - What reports must I submit?
§ 63.4730 - What records must I keep?
§ 63.4731 - In what form and for how long must I keep my records?

COMPLIANCE REQUIREMENTS FOR THE COMPLIANT MATERIAL OPTION
§ 63.4740 - By what date must I conduct the initial compliance demonstration?
§ 63.4741 - How do I demonstrate initial compliance with the emission limitations?
§ 63.4742 - How do I demonstrate continuous compliance with the emission limitations?

COMPLIANCE REQUIREMENTS FOR THE EMISSION RATE WITHOUT ADD-ON CONTROLS OPTION
§ 63.4750 - By what date must I conduct the initial compliance demonstration?
§ 63.4751 - How do I demonstrate initial compliance with the emission limitations?
§ 63.4752 - How do I demonstrate continuous compliance with the emission limitations?

COMPLIANCE REQUIREMENTS FOR THE EMISSION RATE WITH ADD-ON CONTROLS OPTION
§ 63.4760 - By what date must I conduct performance tests and other initial compliance demonstrations?
§ 63.4761 - How do I demonstrate initial compliance?
§ 63.4762 - [Reserved]
§ 63.4763 - How do I demonstrate continuous compliance with the emission limitations?
§ 63.4764 - What are the general requirements for performance tests?
§ 63.4765 - How do I determine the emission capture system efficiency?
§ 63.4766 - How do I determine the add-on control device emission destruction or removal efficiency?
§ 63.4767 - How do I establish the emission capture system and add-on control device operating limits during the performance test?
§ 63.4768 - What are the requirements for continuous parameter monitoring system installation, operation, and maintenance?

OTHER REQUIREMENTS AND INFORMATION
§ 63.4780 - Who implements and enforces this subpart?
§ 63.4781 - What definitions apply to this subpart?
Appendix - Table 1 to Subpart QQQQ of Part 63—Emission Limits for New or Reconstructed Affected Sources
Appendix - Table 2 to Subpart QQQQ of Part 63—Emission Limits for Existing Affected Sources
Appendix - Table 3 to Subpart QQQQ of Part 63—Operating Limits if Using the Emission Rate With Add-On Controls Option
Appendix - Table 4 to Subpart QQQQ of Part 63—Applicability of General Provisions to Subpart QQQQ of Part 63
Appendix - Table 5 to Subpart QQQQ of Part 63—Default Organic HAP Mass Fraction for Solvents and Solvent Blends
Appendix - Table 6 to Subpart QQQQ of Part 63—Default Organic HAP Mass Fraction for Petroleum Solvent Groups a
Appendix - Table 7 to Subpart QQQQ of Part 63—List of HAP That Must Be Counted Toward Organic HAP Content if Present at 0.1 Percent or More by Mass
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