Acronyms, Abbreviations, and Chemical Nomenclature

AIRS	Aerometric Information Retrieval System

Al	Aluminum

AOI	Area of Influence

AOV	Area of Violation

API	American Petroleum Institute

AQSM	Air Quality Simulation Model

BEIS	Biogenic Emission Inventory System

BEIS2	Biogenic Emission Inventory System - Version 2

CAA	Clean Air Act

CASTNET	Clean Air Status and Trends Network

CEMS	Continuous Emissions Monitoring System

CFCl3	Chlorofluorocarbons

CMB	Chemical Mass Balance

CO	Carbon Monoxide

CO2	Carbon Dioxide

DIAL	Differential Absorption Lidars

DNPH	Dinitrophenylhydrazine

DOAS	Differential Optical Absorption Spectrometry

EIIP	Emission Inventory Improvement Program

EOF	Empirical Orthogonal Functions

EPA	Environmental Protection Agency

EPRI	Electric Power Research Institute

FAA	Federal Aviation Administration

FAAED	Federal Aviation Administration Emissions Database

FACA	Federal Advisory Committee Act

FDDA	Four Dimensional Data Assimilation

Fe	Iron

FIRE	EPA's Factor Information Retrieval Data Base

FRM	Federal Reference Method

GC-FID	Gas Chromatography with Flame Ionization Detector

GCVTC	Grand Canyon Visibility Transport Commission

HC	Hydrocarbons

HNO3	Nitric Acid

HONO	Nitrous Acid

HOx	Hydrogen Oxide Radicals

HPLC	High Pressure Liquid Chromatography

HPS	High Pressure System

HPMS	Federal Highway Administration's Highway Performance Monitoring System

IMPROVE	Interagency Monitoring of Protected Visual Environments

ISC3	Industrial Source Complex Model

K	Potassium

LMOS	Lake Michigan Ozone Study

LPS	Low Pressure System

LST	Local Standard Time

MOBILE	EPA Mobile Sources Emission Factor Model

MOHAVE	Measurement of Haze and Visual Effects

NAAQS	National Ambient Air Quality Standards

NAMS	National Air Monitoring Stations

NAPAP	National Acid Precipitation Assessment Program

NARSTO	North American Research Strategy for Tropospheric Ozone

NDDN	National Dry Deposition Network

NEC-OPS	Northeast Corridor-Oxidant and Particulate Study

NESCAUM	Northeast States Coordinated Air Use Management

NEXRAD	Next Generation Weather Radar

NH3	Ammonia

NMHC	Non-Methane Hydrocarbons

NMOC	Non-Methane Organic Compound

NO	Nitric Oxide

NO2	Nitrogen Dioxide

NOx	Oxides of Nitrogen

NOy	Total Available Nitrogen

NOAA	National Oceanic and Atmospheric Administration

NWS	National Weather Service

O3	Ozone

OC	Organic Carbon

OCD	Offshore and Coastal Dispersion Model

OMS	Office of Mobile Sources

OTAG	Ozone Transport Assessment Group

OTC	Ozone Transport Commission

PAMS	Photochemical Assessment Monitoring Stations

PAN	Peroxyacetyl Nitrate

PBL	Planetary Boundary Layer

PCA	Principal Component Analysis

PM	Particulate Matter

PM-2.5	Particles with an Aerodynamic Diameter Less than or Equal to a Nominal 2.5 Micrometers

PM-10	Particles with an Aerodynamic Diameter Less than or Equal to a Nominal 10 Micrometers

ppt	Parts Per Thousand

PREVENT	Pacific Northwest Regional Visibility Experiment Using Natural Tracers

RAMP	Regional Air Management Partnership

RASS	Radio Acoustic Sounding Systems

RADM	Regional Acid Deposition Model

RFP	Reasonable Further Progress

RH	Regional Haze

RMAPS	Receptor Model Applied to Patterns in Space

RO	Regional Offices

RONO2	Organic Nitrates

RPM	Reactive Plume Model

SAMI	Southern Appalachian Mountains Initiative

SARMAP	San Joaquin Valley Air Quality Study/Atmospheric Utilities Signatures, Predictions and Experiments Regional Modeling Adaption Project

SAW	Source Attribution Workshop

SCAQMD	South Coast Air Quality Management Division

SCAQS	Southern California Air Quality Study

SCOS97	Southern California Ozone Study of 1997

Si	Silicon

SIP	State Implementation Plan

SITEOF	Source Identification by Empirical Orthogonal Functions

SLAMS	State and Local Air Monitoring Stations

SO2	Sulfur Dioxide

SOA	Secondary Organic Aerosol

SOS	Southern Oxidant Study

STSWG	Science and Technical Support Work Group

SVOC	Semi-Volatile Organic Compounds

SWS	Synoptic Weather Systems

TDLAS	Tunable Diode Laser Absorption Spectroscopy

UAM	Urban Airshed Model

UV	Ultraviolet

VMT	Vehicle Miles Traveled

VOC	Volatile Organic Compound