IM240

vehicle emissions test using a dynamometer, which lasts for 240 seconds

IMPROVE

Interagency Monitoring of Protected Visual Environments

IRIS

Integrated Risk Information System

ISTEA

Intermodal Surface Transportation Efficiency Act (1991)

IWG

International Working Group on Environmental Justice


kW

kilowatts


LAER

lowest achievable emissions rate

lb

pounds

LDT

light-duty truck

LDV

light-duty vehicle

LEV

low-emissions vehicle

LPG

liquified petroleum gas

LTER

long-term ecological research

LTM

long-term monitoring


MACT

maximum achievable control technology

MATES

multiple air toxics exposure study

MDN

Mercury Deposition Network

mg/m3

milligrams per cubic meter

μg/m3

micrograms per cubic meter

MOBILE

EPA’s computer program to estimate mobile-source emissions

MPO

Metropolitan Planning Organization

MSA

metropolitan statistical area

MTBE

methyl tert-butyl ether


NAA

nonattainment area

NAAQS

National Ambient Air Quality Standards

NADP

National Atmospheric Deposition Program

NAMS

national air monitoring stations

NAPAP

National Acid Precipitation Assessment Program

NATA

National Air Toxics Assessment

NCLAN

National Crop Loss Assessment Network

NCore

National Core Monitoring Network

NCS

National Children’s Study

NEJAC

National Environmental Justice Advisory Council

NEP

National Estuaries Program

NEPA

National Environmental Policy Act

NERRS

National Estuarine Research Reserve System (NOAA)

NESHAPs

National Emission Standards for Hazardous Air Pollutants

NFS

National Forest System

NHANES

National Health and Nutrition Examination Survey

NHEXAS

National Human Exposure Assessment Survey



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