U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 63Subpart UUU - Subpart UUU—National Emission Standards for Hazardous Air Pollutants for Petroleum Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units

WHAT THIS SUBPART COVERS
§ 63.1560 - What is the purpose of this subpart?
§ 63.1561 - Am I subject to this subpart?
§ 63.1562 - What parts of my plant are covered by this subpart?
§ 63.1563 - When do I have to comply with this subpart?

CATALYTIC CRACKING UNITS, CATALYTIC REFORMING UNITS, SULFUR RECOVERY UNITS, AND BYPASS LINES
§ 63.1564 - What are my requirements for metal HAP emissions from catalytic cracking units?
§ 63.1565 - What are my requirements for organic HAP emissions from catalytic cracking units?
§ 63.1566 - What are my requirements for organic HAP emissions from catalytic reforming units?
§ 63.1567 - What are my requirements for inorganic HAP emissions from catalytic reforming units?
§ 63.1568 - What are my requirements for HAP emissions from sulfur recovery units?
§ 63.1569 - What are my requirements for HAP emissions from bypass lines?

GENERAL COMPLIANCE REQUIREMENTS
§ 63.1570 - What are my general requirements for complying with this subpart?
§ 63.1571 - How and when do I conduct a performance test or other initial compliance demonstration?
§ 63.1572 - What are my monitoring installation, operation, and maintenance requirements?
§ 63.1573 - What are my monitoring alternatives?

NOTIFICATIONS, REPORTS, AND RECORDS
§ 63.1574 - What notifications must I submit and when?
§ 63.1575 - What reports must I submit and when?
§ 63.1576 - What records must I keep, in what form, and for how long?

OTHER REQUIREMENTS AND INFORMATION
§ 63.1577 - What parts of the General Provisions apply to me?
§ 63.1578 - Who implements and enforces this subpart?
§ 63.1579 - What definitions apply to this subpart?
Appendix - Table 1 to Subpart UUU of Part 63—Metal HAP Emission Limits for Catalytic Cracking Units
Appendix - Table 2 to Subpart UUU of Part 63—Operating Limits for Metal HAP Emissions From Catalytic Cracking Units
Appendix - Table 3 to Subpart UUU of Part 63—Continuous Monitoring Systems for Metal HAP Emissions From Catalytic Cracking Units
Appendix - Table 4 to Subpart UUU of Part 63—Requirements for Performance Tests for Metal HAP Emissions From Catalytic Cracking Units
Appendix - Table 5 to Subpart UUU of Part 63—Initial Compliance With Metal HAP Emission Limits for Catalytic Cracking Units
Appendix - Table 6 to Subpart UUU of Part 63—Continuous Compliance With Metal HAP Emission Limits for Catalytic Cracking Units
Appendix - Table 7 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for Metal HAP Emissions From Catalytic Cracking Units
Appendix - Table 8 to Subpart UUU of Part 63—Organic HAP Emission Limits for Catalytic Cracking Units
Appendix - Table 9 to Subpart UUU of Part 63—Operating Limits for Organic HAP Emissions From Catalytic Cracking Units
Appendix - Table 10 to Subpart UUU of Part 63—Continuous Monitoring Systems for Organic HAP Emissions From Catalytic Cracking Units
Appendix - Table 11 to Subpart UUU of Part 63—Requirements for Performance Tests for Organic HAP Emissions From Catalytic Cracking Units Not Subject to New Source Performance Standard (NSPS) for Carbon Monoxide (CO)
Appendix - Table 12 to Subpart UUU of Part 63—Initial Compliance With Organic HAP Emission Limits for Catalytic Cracking Units
Appendix - Table 13 to Subpart UUU of Part 63—Continuous Compliance With Organic HAP Emission Limits for Catalytic Cracking Units
Appendix - Table 14 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for Organic HAP Emissions From Catalytic Cracking Units
Appendix - Table 15 to Subpart UUU of Part 63—Organic HAP Emission Limits for Catalytic Reforming Units
Appendix - Table 16 to Subpart UUU of Part 63—Operating Limits for Organic HAP Emissions From Catalytic Reforming Units
Appendix - Table 17 to Subpart UUU of Part 63—Continuous Monitoring Systems for Organic HAP Emissions From Catalytic Reforming Units
Appendix - Table 18 to Subpart UUU of Part 63—Requirements for Performance Tests for Organic HAP Emissions From Catalytic Reforming Units
Appendix - Table 19 to Subpart UUU of Part 63—Initial Compliance With Organic HAP Emission Limits for Catalytic Reforming Units
Appendix - Table 20 to Subpart UUU of Part 63—Continuous Compliance With Organic HAP Emission Limits for Catalytic Reforming Units
Appendix - Table 21 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for Organic HAP Emissions From Catalytic Reforming Units
Appendix - Table 22 to Subpart UUU of Part 63—Inorganic HAP Emission Limits for Catalytic Reforming Units
Appendix - Table 23 to Subpart UUU of Part 63—Operating Limits for Inorganic HAP Emission Limitations for Catalytic Reforming Units
Appendix - Table 24 to Subpart UUU of Part 63—Continuous Monitoring Systems for Inorganic HAP Emissions From Catalytic Reforming Units
Appendix -
Appendix - Table 26 to Subpart UUU of Part 63—Initial Compliance With Inorganic HAP Emission Limits for Catalytic Reforming Units
Appendix - Table 27 to Subpart UUU of Part 63—Continuous Compliance With Inorganic HAP Emission Limits for Catalytic Reforming Units
Appendix - Table 28 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for Inorganic HAP Emissions From Catalytic Reforming Units
Appendix - Table 29 to Subpart UUU of Part 63—HAP Emission Limits for Sulfur Recovery Units
Appendix - Table 30 to Subpart UUU of Part 63—Operating Limits for HAP Emissions From Sulfur Recovery Units
Appendix - Table 31 to Subpart UUU of Part 63—Continuous Monitoring Systems for HAP Emissions From Sulfur Recovery Units
Appendix - Table 32 to Subpart UUU of Part 63—Requirements for Performance Tests for HAP Emissions From Sulfur Recovery Units Not Subject to the New Source Performance Standards for Sulfur Oxides
Appendix - Table 33 to Subpart UUU of Part 63—Initial Compliance With HAP Emission Limits for Sulfur Recovery Units
Appendix - Table 34 to Subpart UUU of Part 63—Continuous Compliance With HAP Emission Limits for Sulfur Recovery Units
Appendix - Table 35 to Subpart UUU of Part 63—Continuous Compliance With Operating Limits for HAP Emissions From Sulfur Recovery Units
Appendix - Table 36 to Subpart UUU of Part 63—Work Practice Standards for HAP Emissions From Bypass Lines
Appendix - Table 37 to Subpart UUU of Part 63—Requirements for Performance Tests for Bypass Lines
Appendix - Table 38 to Subpart UUU of Part 63—Initial Compliance With Work Practice Standards for HAP Emissions From Bypass Lines
Appendix - Table 39 to Subpart UUU of Part 63—Continuous Compliance With Work Practice Standards for HAP Emissions From Bypass Lines
Appendix - Table 40 to Subpart UUU of Part 63—Requirements for Installation, Operation, and Maintenance of Continuous Opacity Monitoring Systems and Continuous Emission Monitoring Systems
Appendix - Table 41 to Subpart UUU of Part 63—Requirements for Installation, Operation, and Maintenance of Continuous Parameter Monitoring Systems
Appendix - Table 42 to Subpart UUU of Part 63—Additional Information for Initial Notification of Compliance Status
Appendix - Table 43 to Subpart UUU of Part 63—Requirements for Reports
Appendix - Table 44 to Subpart UUU of Part 63—Applicability of NESHAP General Provisions to Subpart UUU
Appendix Appendix A - Appendix A to Subpart UUU of Part 63—Determination of Metal Concentration on Catalyst Particles (Instrumental Analyzer Procedure)
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