U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 30, 2025

All TitlesTitle 40Chapter IPart 63Subpart DDDD - Subpart DDDD—National Emission Standards for Hazardous Air Pollutants: Plywood and Composite Wood Products

WHAT THIS SUBPART COVERS
§ 63.2230 - What is the purpose of this subpart?
§ 63.2231 - Does this subpart apply to me?
§ 63.2232 - What parts of my plant does this subpart cover?
§ 63.2233 - When do I have to comply with this subpart?

COMPLIANCE OPTIONS, OPERATING REQUIREMENTS, AND WORK PRACTICE REQUIREMENTS
§ 63.2240 - What are the compliance options and operating requirements and how must I meet them?
§ 63.2241 - What are the work practice requirements and how must I meet them?

GENERAL COMPLIANCE REQUIREMENTS
§ 63.2250 - What are the general requirements?
§ 63.2251 - What are the requirements for the routine control device maintenance exemption?
§ 63.2252 - What are the requirements for process units that have no control or work practice requirements?

INITIAL COMPLIANCE REQUIREMENTS
§ 63.2260 - How do I demonstrate initial compliance with the compliance options, operating requirements, and work practice requirements?
§ 63.2261 - By what date must I conduct performance tests or other initial compliance demonstrations?
§ 63.2262 - How do I conduct performance tests and establish operating requirements?
§ 63.2263 - Initial compliance demonstration for a dry rotary dryer.
§ 63.2264 - Initial compliance demonstration for a hardwood veneer dryer.
§ 63.2265 - Initial compliance demonstration for a softwood veneer dryer.
§ 63.2266 - Initial compliance demonstration for a veneer redryer.
§ 63.2267 - Initial compliance demonstration for a reconstituted wood product press or board cooler.
§ 63.2268 - Initial compliance demonstration for a wet control device.
§ 63.2269 - What are my monitoring installation, operation, and maintenance requirements?

CONTINUOUS COMPLIANCE REQUIREMENTS
§ 63.2270 - How do I monitor and collect data to demonstrate continuous compliance?
§ 63.2271 - How do I demonstrate continuous compliance with the compliance options, operating requirements, and work practice requirements?

NOTIFICATIONS, REPORTS, AND RECORDS
§ 63.2280 - What notifications must I submit and when?
§ 63.2281 - What reports must I submit and when?
§ 63.2282 - What records must I keep?
§ 63.2283 - In what form and how long must I keep my records?

OTHER REQUIREMENTS AND INFORMATION
§ 63.2290 - What parts of the general provisions apply to me?
§ 63.2291 - Who implements and enforces this subpart?
§ 63.2292 - What definitions apply to this subpart?
Appendix - Table 1A to Subpart DDDD of Part 63—Production-Based Compliance Options
Appendix - Table 1B to Subpart DDDD of Part 63—Add-on Control Systems Compliance Options
Appendix - Table 2 to Subpart DDDD of Part 63—Operating Requirements
Appendix - Table 3 to Subpart DDDD of Part 63—Work Practice Requirements
Appendix - Table 4 to Subpart DDDD of Part 63—Requirements for Performance Tests
Appendix - Table 5 to Subpart DDDD of Part 63—Performance Testing and Initial Compliance Demonstrations for the Compliance Options and Operating Requirements
Appendix - Table 6 to Subpart DDDD of Part 63—Initial Compliance Demonstrations for Work Practice Requirements
Appendix - Table 7 to Subpart DDDD of Part 63—Continuous Compliance With the Compliance Options and Operating Requirements
Appendix - Table 8 to Subpart DDDD of Part 63—Continuous Compliance With the Work Practice Requirements
Appendix - Table 9 to Subpart DDDD of Part 63—Requirements for Reports
Appendix - Table 10 to Subpart DDDD of Part 63—Applicability of General Provisions to This Subpart
Appendix Appendix A - Appendix A to Subpart DDDD of Part 63—Alternative Procedure To Determine Capture Efficiency From Enclosures Around Hot Presses in the Plywood and Composite Wood Products Industry Using Sulfur Hexafluoride Tracer Gas
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