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Title 40

Displaying title 40, up to date as of 8/10/2026. Title 40 was last amended 8/07/2026.
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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 HNational Emission Standards for Hazardous Air Pollutants for Equipment Leaks and Fenceline Monitoring for All Emission Sources63.160 – 63.184
§ 63.160Applicability and designation of source.
§ 63.161Definitions.
§ 63.162Standards: General.
§ 63.163Standards: Pumps in light liquid service.
§ 63.164Standards: Compressors.
§ 63.165Standards: Pressure relief devices in gas/vapor service or light liquid service.
§ 63.166Standards: Sampling connection systems.
§ 63.167Standards: Open-ended valves or lines.
§ 63.168Standards: Valves in gas/vapor service and in light liquid service.
§ 63.169Standards: Pumps, valves, connectors, and agitators in heavy liquid service; instrumentation systems; and pressure relief devices in liquid service.
§ 63.170Standards: Surge control vessels and bottoms receivers.
§ 63.171Standards: Delay of repair.
§ 63.172Standards: Closed-vent systems and control devices.
§ 63.173Standards: Agitators in gas/vapor service and in light liquid service.
§ 63.174Standards: Connectors in gas/vapor service and in light liquid service.
§ 63.175Quality improvement program for valves.
§ 63.176Quality improvement program for pumps.
§ 63.177Alternative means of emission limitation: General.
§ 63.178Alternative means of emission limitation: Batch processes.
§ 63.179Alternative means of emission limitation: Enclosed-vented process units.
§ 63.180Test methods and procedures.
§ 63.181Recordkeeping requirements.
§ 63.182Reporting requirements.
§ 63.183Implementation and enforcement.
§ 63.184Fenceline monitoring provisions.
Table 1 to Subpart H of Part 63
Batch Processes
Table 2 to Subpart H of Part 63
Surge Control Vessels and Bottoms Receivers at Existing Sources
Table 3 to Subpart H of Part 63
Surge Control Vessels and Bottoms Receivers at New Sources
Table 4 to Subpart H of Part 63
Applicable 40 CFR Part 63 General Provisions