Hazardous Waste Code - toxic
UEL
Upper Explosive Limit
UF
Ultrafiltration
UFC
Uniform Fire Code
UFL
Upper Flammable Limit
g
Microgram (1E-6 Grams)
g/L
Micrograms per Liter (Parts per billion in DI Water)
g/m3
Micrograms per Cubic Meter
UHC
Underlying Hazardous Constituents
UHWM
Uniform Hazardous Waste Manifest
UIC
Underground Injection Control
UL
Underwriters Laboratories
UMTA
Urban Mass Transportation Administration
Universal
waste
Any of the following hazardous wastes that are managed under the universal waste requirements of 40 CFR 273. Examples of universal wastes are: batteries (40 CFR 273.2), pesticides (40 CFR 273.3), thermostats (40 CFR 273.4), etc.
UN
United Nations
UPAC
International Union of Pure and Applied Chemistry
USC
United States Code
USCG
United States Coast Guard
USDA
United States Department of Agriculture
USDW
Underground Source of Drinking Water
Used oil
Any oil that has been refined from crude oil or any synthetic oil, that has been used and as a result of such is contaminated by physical or chemical impurities.
USEPA
United States Environmental Protection Agency
UST
Underground Storage Tank; a tank with greater than 10% of its piping or tankage volume below the grade of the Earth.
UTS
Universal Treatment Standards