U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 40Chapter IPart 63Subpart S - Subpart S—National Emission Standards for Hazardous Air Pollutants from the Pulp and Paper Industry
§ 63.440 - Applicability.
§ 63.441 - Definitions.
§ 63.442 - [Reserved]
§ 63.443 - Standards for the pulping system at kraft, soda, and semi-chemical processes.
§ 63.444 - Standards for the pulping system at sulfite processes.
§ 63.445 - Standards for the bleaching system.
§ 63.446 - Standards for kraft pulping process condensates.
§ 63.447 - Clean condensate alternative.
§§ 63.448-63.449 - §[Reserved]
§ 63.450 - Standards for enclosures and closed-vent systems.
§§ 63.451-63.452 - §[Reserved]
§ 63.453 - Monitoring requirements.
§ 63.454 - Recordkeeping requirements.
§ 63.455 - Reporting requirements.
§ 63.456 - Affirmative defense for violation of emission standards during malfunction.
§ 63.457 - Test methods and procedures.
§ 63.458 - Implementation and enforcement.
§ 63.459 - Alternative standards.
Appendix - Table 1 to Subpart S of Part 63—General Provisions Applicability to Subpart S a
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