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U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 63Subpart TTT - Subpart TTT—National Emission Standards for Hazardous Air Pollutants for Primary Lead Smelting
§ 63.1541 - Applicability.
§ 63.1542 - Definitions.
§ 63.1543 - Standards for process and process fugitive sources.
§ 63.1544 - Standards for fugitive dust sources.
§ 63.1545 - Compliance dates.
§ 63.1546 - Performance testing.
§ 63.1547 - Monitoring requirements.
§ 63.1548 - Notification requirements.
§ 63.1549 - Recordkeeping and reporting requirements.
§ 63.1550 - Delegation of authority.
§ 63.1551 - Affirmative defense for exceedance of emission limit during malfunction.
Appendix - Table 1 to Subpart TTT of Part 63—General Provisions Applicability to Subpart TTT
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