40 CFR § 63.1080 - What is the purpose of this subpart?

---
identifier: "/us/cfr/t40/s63.1080"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.1080 - What is the purpose of this subpart?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.1080"
section_name: "What is the purpose of this subpart?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "63"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "57 FR 61992, Dec. 29, 1992, unless otherwise noted."
cfr_part: "63"
---


# 63.1080 What is the purpose of this subpart?

This subpart establishes requirements for controlling emissions of hazardous air pollutants (HAP) from heat exchange systems and waste streams at new and existing ethylene production units.