U list - Listed Hazardous Waste: Toxic Hazardous Waste when Discarded, Off-Specification, or Spilled
UAC - User Advisory Committee
UAM - Urban Airshed Model
UAO - Unilateral Administrative Order
UAPSP - Utility Acid Precipitation Study Program
UAQI - Uniform Air Quality Index
UARG - Utility Air Regulatory Group
UBC - Uniform Building Code
U/BK - Uptake/Biokinetic
UC - Unauthorized Commitment
UCA - Undefinitized Contractural Action
UCC - Ultra Clean Coal
UCCI - Urea-Formaldehyde Foam Insulation
UCF - Upset Correction Factor
UCL - Upper Control Limit
UCL - Upper Confidence Limit
UCM - Unregulated Contaminant Monitoring
UCR - Upper Confidence Range
UCS - Unconfined Compressive Strength
UDMH - Unsymmetrical Dimethyl Hydrazine
UEL - Upper Explosive Limit
UF - Uncertainty Factor
UFC - Uniform Fire Code
UFL - Upper Flammability Limit
µg - microgram
µg/dl - Micrograms per deciliter
µg/l - Micrograms per Liter
µg/m3 - Micrograms per cubic meter
UHC - Underlying Hazardous Constituent
UIC - Underground Injection Control
UICTS - UIC Tracking System
UL - Underwriters Laboratory
ULEV - Ultra Low Emission Vehicles
ULF - Upper Flammability Limit
ULP - Unfair Labor Practice
um - micrometer
UMP - Upward Mobility Program
UMRA - Unfunded Mandates Reform Act
UMTA - Urban Mass Transportation Administration
UMTRCA - Uranium Mill Tailings Radiation Control Act
UN - United Nations
UNAMAP - User's Network for Applied Modeling of Air Pollution
UNECE - United Nations Economic Commission for Europe
UNEP - United Nations Environment Program
UNESCO - United Nations Educational, Scientific, and Cultural Organization
UNIDO - United Nations Industrial Development Organization
UNIX - Operating System developed by AT&T
UO - Utilization Officer
UORA - Used Oil Recycling Act
UPCONE - Upconing of a Salt-Water/Fresf-Water Interface Below a Pumping Well
UR - Uptake Rate
URF - Inhalation Unit Risk Factor
URIS - Unregulated Contaminant Information System
US - United States of America
USA - United States Army
USA - United States Attorney
USACCE - United States Army Contracting Command, Europe
USACE - United States Army Corp of Engineers
USAO - United States Attorney’s Office
USAREUR - United States Army, Europe
USATHAMA - U.S. Army Toxic and Hazardous Materials Agency
USBM - United States Bureau of Mines
USBS - United States Bureau of Standards
USC - Unified Soil Classification
USC - United States Code
USCA - United States Code Annotated
USCA - Unit- Specific Correlation Approach
USCG - United States Coast Guard
USCP - United States Capitol Police
USDA - United States Department of Agriculture
USDOI - United States Department of the Interior
USDOT - United States Department of Transportation
USDW - Underground Source(s) of Drinking Water
USEPA - United States Environmental Protection Agency
USFS - Untied States Forest Service
USGS - United States Geological Survey
USLE - Universal Soil Loss Equation
USMC - United States Marine Corps
USN - United States Navy
USNRC - United States Nuclear Regulatory Commission
USPHS - United States Public Health Service
USPP - United States Park Police
USPS - United States Postal Service
USSS - United States Secret Service
UST - Underground Storage Tank
USWAG - Utility Solid Waste Activities Group
UTM - Universal Transverse Mercator
UTP - Urban Transportation Planning
UTS - Universal Treatment Standards
UV - Ultraviolet
UVA - Ultraviolet Radiation Band
UVB - Ultraviolet Radiation Band
UVC - Ultraviolet Radiation Band
UZM - Unsaturated Zone Monitoring
RETURN to COA Home Page