U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 63Subpart XX - Subpart XX—National Emission Standards for Ethylene Manufacturing Process Units: Heat Exchange Systems and Waste Operations

INTRODUCTION
§ 63.1080 - What is the purpose of this subpart?
§ 63.1081 - When must I comply with the requirements of this subpart?

DEFINITIONS
§ 63.1082 - What definitions do I need to know?

APPLICABILITY FOR HEAT EXCHANGE SYSTEMS
§ 63.1083 - Does this subpart apply to my heat exchange system?
§ 63.1084 - What heat exchange systems are exempt from the requirements of this subpart?

HEAT EXCHANGE SYSTEM REQUIREMENTS
§ 63.1085 - What are the general requirements for heat exchange systems?

MONITORING REQUIREMENTS FOR HEAT EXCHANGE SYSTEMS
§ 63.1086 - How must I monitor for leaks to cooling water?

REPAIR REQUIREMENTS FOR HEAT EXCHANGE SYSTEMS
§ 63.1087 - What actions must I take if a leak is detected?
§ 63.1088 - In what situations may I delay leak repair, and what actions must I take for delay of repair?

RECORDKEEPING AND REPORTING REQUIREMENTS FOR HEAT EXCHANGE SYSTEMS
§ 63.1089 - What records must I keep?
§ 63.1090 - What reports must I submit?

BACKGROUND FOR WASTE REQUIREMENTS
§ 63.1091 - What do the waste requirements do?
§ 63.1092 - What are the major differences between the requirements of 40 CFR part 61, subpart FF, and the waste requirements for ethylene production sources?

APPLICABILITY FOR WASTE REQUIREMENTS
§ 63.1093 - Does this subpart apply to my waste streams?
§ 63.1094 - What waste streams are exempt from the requirements of this subpart?

WASTE REQUIREMENTS
§ 63.1095 - What specific requirements must I comply with?
§ 63.1096 - What requirements must I comply with if I transfer waste off-site?

IMPLEMENTATION AND ENFORCEMENT
§ 63.1097 - Who implements and enforces this subpart?
Appendix - Table 1 to Subpart XX of Part 63—Hazardous Air Pollutants
Appendix - Table 2 to Subpart XX of Part 63—Requirements of 40 CFR Part 61, Subpart FF, Not Included in the Requirements for This Subpart and Alternate Requirements
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