40 CFR § 59.685 - What symbols, acronyms, and abbreviations does this subpart use?

---
identifier: "/us/cfr/t40/s59.685"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 59.685 - What symbols, acronyms, and abbreviations does this subpart use?"
title_number: 40
title_name: "Protection of Environment"
section_number: "59.685"
section_name: "What symbols, acronyms, and abbreviations does this subpart use?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "59"
part_name: "NATIONAL VOLATILE ORGANIC COMPOUND EMISSION STANDARDS FOR CONSUMER AND COMMERCIAL PRODUCTS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7414 and 7511b(e)."
regulatory_source: "64 FR 48815, Sept. 11, 1998, unless otherwise noted."
cfr_part: "59"
---


# 59.685 What symbols, acronyms, and abbreviations does this subpart use?

The following symbols, acronyms, and abbreviations apply to this subpart:

CFR Code of Federal Regulations

EPA Environmental Protection Agency

HC hydrocarbon

NIST National Institute of Standards and Technology

THC total hydrocarbon

U.S.C. United States Code