U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 63Subpart GGGGG - Subpart GGGGG—National Emission Standards for Hazardous Air Pollutants: Site Remediation

WHAT THIS SUBPART COVERS
§ 63.7880 - What is the purpose of this subpart?
§ 63.7881 - Am I subject to this subpart?
§ 63.7882 - What site remediation sources at my facility does this subpart affect?
§ 63.7883 - When do I have to comply with this subpart?

GENERAL STANDARDS
§ 63.7884 - What are the general standards I must meet for each site remediation with affected sources?
§ 63.7885 - What are the general standards I must meet for my affected process vents?
§ 63.7886 - What are the general standards I must meet for my affected remediation material management units?
§ 63.7887 - What are the general standards I must meet for my affected equipment leak sources?
§ 63.7888 - How do I implement this rule at my facility using the cross-referenced requirements in other subparts?

PROCESS VENTS
§ 63.7890 - What emissions limitations and work practice standards must I meet for process vents?
§ 63.7891 - How do I demonstrate initial compliance with the emissions limitations and work practice standards for process vents?
§ 63.7892 - What are my inspection and monitoring requirements for process vents?
§ 63.7893 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for process vents?

TANKS
§ 63.7895 - What emissions limitations and work practice standards must I meet for tanks?
§ 63.7896 - How do I demonstrate initial compliance with the emissions limitations and work practice standards for tanks?
§ 63.7897 - What are my inspection and monitoring requirements for tanks?
§ 63.7898 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for tanks?

CONTAINERS
§ 63.7900 - What emissions limitations and work practice standards must I meet for containers?
§ 63.7901 - How do I demonstrate initial compliance with the emissions limitations and work practice standards for containers?
§ 63.7902 - What are my inspection and monitoring requirements for containers?
§ 63.7903 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for containers?

SURFACE IMPOUNDMENTS
§ 63.7905 - What emissions limitations or work practice standards must I meet for surface impoundments?
§ 63.7906 - How do I demonstrate initial compliance with the emissions limitations or work practice standards for surface impoundments?
§ 63.7907 - What are my inspection and monitoring requirements for surface impoundments?
§ 63.7908 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for surface impoundments?

§ 63.7910 - What emissions limitations and work practice standards must I meet for separators?
§ 63.7911 - How do I demonstrate initial compliance with the emissions limitations and work practice standards for separators?
§ 63.7912 - What are my inspection and monitoring requirements for separators?
§ 63.7913 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for separators?

TRANSFER SYSTEMS
§ 63.7915 - What emissions limitations and work practice standards must I meet for transfer systems?
§ 63.7916 - How do I demonstrate initial compliance with the emissions limitations and work practice standards for transfer systems?
§ 63.7917 - What are my inspection and monitoring requirements for transfer systems?
§ 63.7918 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for transfer systems?

EQUIPMENT LEAKS AND PRESSURE RELIEF DEVICES
§ 63.7920 - What emissions limitations and work practice standards must I meet for equipment leaks?
§ 63.7921 - How do I demonstrate initial compliance with the emissions limitations and work practice standards for equipment leaks?
§ 63.7922 - How do I demonstrate continuous compliance with the work practice standards for equipment leaks?
§ 63.7923 - What monitoring and work practice standards must I meet for pressure relief devices?

CLOSED VENT SYSTEMS AND CONTROL DEVICES
§ 63.7925 - What emissions limitations and work practice standards must I meet for closed vent systems and control devices?
§ 63.7926 - How do I demonstrate initial compliance with the emission limitations and work practice standards for closed vent systems and control devices?
§ 63.7927 - What are my inspection and monitoring requirements for closed vent systems and control devices?
§ 63.7928 - How do I demonstrate continuous compliance with the emissions limitations and work practice standards for closed vent systems and control devices?

GENERAL COMPLIANCE REQUIREMENTS
§ 63.7935 - What are my general requirements for complying with this subpart?
§ 63.7936 - What requirements must I meet if I transfer remediation material off-site to another facility?
§ 63.7937 - How do I demonstrate initial compliance with the general standards?
§ 63.7938 - How do I demonstrate continuous compliance with the general standards?

PERFORMANCE TESTS
§ 63.7940 - By what date must I conduct performance tests or other initial compliance demonstrations?
§ 63.7941 - How do I conduct a performance test, design evaluation, or other type of initial compliance demonstration?
§ 63.7942 - When must I conduct subsequent performance tests?
§ 63.7943 - How do I determine the average VOHAP concentration of my remediation material?
§ 63.7944 - How do I determine the maximum HAP vapor pressure of my remediation material?

CONTINUOUS MONITORING SYSTEMS
§ 63.7945 - What are my monitoring installation, operation, and maintenance requirements?
§ 63.7946 - How do I monitor and collect data to demonstrate continuous compliance?
§ 63.7947 - What are my monitoring alternatives?

NOTIFICATION, REPORTS, AND RECORDS
§ 63.7950 - What notifications must I submit and when?
§ 63.7951 - What reports must I submit and when?
§ 63.7952 - What records must I keep?
§ 63.7953 - In what form and how long must I keep my records?

OTHER REQUIREMENTS AND INFORMATION
§ 63.7955 - What parts of the General Provisions apply to me?
§ 63.7956 - Who implements and enforces this subpart?
§ 63.7957 - What definitions apply to this subpart?
Appendix - Table 1 to Subpart GGGGG of Part 63—List of Hazardous Air Pollutants
Appendix - Table 2 to Subpart GGGGG of Part 63—Control Levels as Required by § 63.7895(a) for Tanks Managing Remediation Material With a Maximum HAP Vapor Pressure Less Than 76.6 kPa
Appendix - Table 3 to Subpart GGGGG of Part 63—Applicability of General Provisions to Subpart GGGGG
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