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Title 40

Displaying title 40, up to date as of 7/20/2026. Title 40 was last amended 7/16/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 63National Emission Standards for Hazardous Air Pollutants for Source Categories63.1 – 63.12099
Subpart DDDDNational Emission Standards for Hazardous Air Pollutants: Plywood and Composite Wood Products63.2230 – 63.2292
Other Requirements and Information63.2290 – 63.2292
§ 63.2290What parts of the general provisions apply to me?
§ 63.2291Who implements and enforces this subpart?
§ 63.2292What definitions apply to this subpart?
Table 1A to Subpart DDDD of Part 63
Production-Based Compliance Options
Table 1B to Subpart DDDD of Part 63
Add-on Control Systems Compliance Options
Table 1C to Subpart DDDD of Part 63
Compliance Options Applicable On and After July 6, 2026
Table 1D to Subpart DDDD of Part 63
Compliance Options Applicable On and After July 6, 2029, for Direct Wood-Fired PCWP Dryers at Affected Sources That Commenced Construction or Reconstruction On or Before May 18, 2023
Table 1E to Subpart DDDD of Part 63
Compliance Options Applicable On and After July 6, 2026, for Direct Wood-Fired PCWP Dryers at Affected Sources That Commenced Construction or Reconstruction After May 18, 2023
Table 2 to Subpart DDDD of Part 63
Operating Requirements
Table 3 to Subpart DDDD of Part 63
Work Practice Requirements
Table 4 to Subpart DDDD of Part 63
Requirements for Performance Tests
Table 5 to Subpart DDDD of Part 63
Performance Testing and Initial Compliance Demonstrations for the Compliance Options and Operating Requirements
Table 6 to Subpart DDDD of Part 63
Initial Compliance Demonstrations for Work Practice Requirements
Table 7 to Subpart DDDD of Part 63
Continuous Compliance With the Compliance Options and Operating Requirements
Table 8 to Subpart DDDD of Part 63
Continuous Compliance With the Work Practice Requirements Requirements
Table 9 to Subpart DDDD of Part 63
Requirements for Reports
Table 10 to Subpart DDDD of Part 63
Applicability of General Provisions to This Subpart
Table 11 to Subpart DDDD of Part 63
Lumber Minimum Moisture Content Limits
Table 12 to Subpart DDDD of Part 63
Toxic Equivalency Factors
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