U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 63Subpart X - Subpart X—National Emission Standards For Hazardous Air Pollutants From Secondary Lead Smelting
§ 63.541 - Applicability.
§ 63.542 - Definitions.
§ 63.543 - What are my standards for process vents?
§ 63.544 - What are my total enclosure standards?
§ 63.545 - What are my standards for fugitive dust sources?
§ 63.546 - Compliance dates.
§ 63.547 - Test methods.
§ 63.548 - Monitoring requirements.
§ 63.549 - Notification requirements.
§ 63.550 - Recordkeeping and reporting requirements.
§ 63.551 - Implementation and enforcement.
§ 63.552 - Affirmative defense to civil penalties for exceedance of emissions limit during malfunction.
Appendix - Table 1 to Subpart X of Part 63—General Provisions Applicability to Subpart X
Appendix - Table 2 to Subpart X of Part 63—Emissions Limits for Secondary Lead Smelting Furnaces
Appendix - Table 3 to Subpart X of Part 63—Toxic Equivalency Factors
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