40 CFR § 129.3 - Abbreviations.

---
identifier: "/us/cfr/t40/s129.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 129.3 - Abbreviations."
title_number: 40
title_name: "Protection of Environment"
section_number: "129.3"
section_name: "Abbreviations."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "129"
part_name: "TOXIC POLLUTANT EFFLUENT STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 307, 308, 501, Federal Water Pollution Control Act Amendments of 1972 (Pub. L. 92-500, 86 Stat. 816, (33 U.S.C. 1251 ))."
regulatory_source: "42 FR 2613, Jan. 12, 1977, unless otherwise noted."
cfr_part: "129"
---


# 129.3 Abbreviations.

The abbreviations used in this part represent the following terms:

lb = pound (or pounds)

g = gram

µg/l = micrograms per liter (1 one-millionth gram/liter)

kg = kilogram(s)

kkg = 1000 kilogram(s)