EAF: Electric Arc Furnaces

EAG: Exposure Assessment Group

EAO: Emergency Administrative Order

EAP: Environmental Action Plan

EAR: Environmental Auditing Roundtable

EASI: Environmental Alliance for Senior Involvement

EB: Emissions Balancing

EC: Emulsifiable Concentrate; Environment Canada; Effective Concentration

ECA: Economic Community for Africa

ECAP: Employee Counselling and Assistance Program

ECD: Electron Capture Detector

ECHH: Electro-Catalytic Hyper-Heaters

ECHO: Enforcement and Compliance History Online

ECL: Environmental Chemical Laboratory

ECOS: Environmental Council of the States

ECR: Enforcement Case Review

ECRA: Economic Cleanup Responsibility Act

ED: Effective Dose

EDA: Emergency Declaration Area

EDB: Ethylene Dibromide

EDC: Ethylene Dichloride

EDD: Enforcement Decision Document

EDF: Environmental Defense Fund

EDRS: Enforcement Document Retrieval System

EDS: Electronic Data System; Energy Data System

EDTA: Ethylene Diamine Triacetic Acid

EDX: Electronic Data Exchange

EDZ: Emission Density Zoning

EEA: Energy and Environmental Analysis

EECs: Estimated Environmental Concentrations

EER: Excess Emission Report

EERL: Eastern Environmental Radiation Laboratory

EERU: Environmental Emergency Response Unit

EESI: Environment and Energy Study Institute

EESL: Environmental Ecological and Support Laboratory

EETFC: Environmental Effects, Transport, and Fate Committee

EF: Emission Factor

EFO: Equivalent Field Office

EFTC: European Fluorocarbon Technical Committee

EGR: Exhaust Gas Recirculation

EH: Redox Potential

EHC: Environmental Health Committee

EHS: Extremely Hazardous Substance

EI: Emissions Inventory

EIA: Environmental Impact Assessment. Economic Impact Assessment

EIL: Environmental Impairment Liability

EIR: Endangerment Information Report; Environmental Impact Report

EIS: Environmental Impact Statement; Environmental Inventory System

EIS/AS: Emissions Inventory System/Area Source

EIS/PS: Emissions Inventory System/Point Source

EJ: Environmental Justice

EKMA: Empirical Kinetic Modeling Approach

EL: Exposure Level

ELI: Environmental Law Institute

ELR: Environmental Law Reporter

EM: Electromagnetic Conductivity

EMAP: Environmental Mapping and Assessment Program

EMAS: Enforcement Management and Accountability System

EMR: Environmental Management Report

EMS: Enforcement Management System

EMSL: Environmental Monitoring Support Systems Laboratory

EMTS: Environmental Monitoring Testing Site; Exposure Monitoring Test Site

EnPA: Environmental Performance Agreement

EO: Ethylene Oxide

EOC: Emergency Operating Center

EOF: Emergency Operations Facility (RTP)

EOP: End Of Pipe

EOT: Emergency Operations Team

EP: Earth Protectors; Environmental Profile; End-use Product; Experimental Product;  Extraction Procedure

EPAA: Environmental Programs Assistance Act

EPAAR: EPA Acquisition Regulations

EPCA: Energy Policy and Conservation Act

EPACT: Environmental Policy Act

EPACASR: EPA Chemical Activities Status Report

EPCRA: Emergency Planning and Community Right to Know Act

EPD: Emergency Planning District

EPI: Environmental Policy Institute

EPIC: Environmental Photographic Interpretation Center

EPNL: Effective Perceived Noise Level

EPRI: Electric Power Research Institute

EPTC: Extraction Procedure Toxicity Characteristic

EQIP: Environmental Quality Incentives Program

ER: Ecosystem Restoration; Electrical Resistivity

ERA: Economic Regulatory Agency

ERAMS: Environmental Radiation Ambient Monitoring System

ERC: Emergency Response Commission. Emissions Reduction Credit, Environmental Research Center

ERCS: Emergency Response Cleanup Services

ERDA: Energy Research and Development Administration

ERD&DAA: Environmental Research, Development and   Demonstration Authorization Act

ERL: Environmental Research Laboratory

ERNS: Emergency Response Notification System

ERP: Enforcement Response Policy

ERT: Emergency Response Team

ERTAQ: ERT Air Quality Model

ES: Enforcement Strategy

ESA: Endangered Species Act. Environmentally Sensitive Area

ESC: Endangered Species Committee

ESCA: Electron Spectroscopy for Chemical Analysis

ESCAP: Economic and Social Commission for Asia and the Pacific

ESECA: Energy Supply and Environmental Coordination Act

ESH: Environmental Safety and Health

ESP: Electrostatic Precipitators

ET: Emissions Trading

ETI: Environmental Technology Initiative

ETP: Emissions Trading Policy

ETS: Emissions Tracking System; Environmental Tobacco Smoke

ETV: Environmental Technology Verification Program

EUP: End-Use Product; Experimental Use Permit

EWCC: Environmental Workforce Coordinating Committee

EXAMS: Exposure Analysis Modeling System

ExEx: Expected Exceedance

FACA: Federal Advisory Committee Act

FAN: Fixed Account Number

FATES: FIFRA and TSCA Enforcement System

FBC: Fluidized Bed Combustion

FCC: Fluid Catalytic Converter

FCCC: Framework Convention on Climate Change

FCCU: Fluid Catalytic Cracking Unit

FCO: Federal Coordinating Officer (in disaster areas); Forms Control Officer

FDF: Fundamentally Different Factors

FDL: Final Determination Letter

FDO: Fee Determination Official

FE: Fugitive Emissions

FEDS: Federal Energy Data System

FEFx: Forced Expiratory Flow

FEIS: Fugitive Emissions Information System

FEL: Frank Effect Level

FEPCA: Federal Environmental Pesticide Control Act; enacted as amendments to FIFRA.

FERC: Federal Energy Regulatory Commission

FES: Factor Evaluation System

FEV: Forced Expiratory Volume

FEV1: Forced Expiratory Volume--one second; Front End Volatility Index

FF: Federal Facilities

FFAR: Fuel and Fuel Additive Registration

FFDCA: Federal Food, Drug, and Cosmetic Act

FFEO: Federal Facilities Enforcement Office

FFF: Firm Financial Facility

FFFSG: Fossil-Fuel-Fired Steam Generator

FFIS: Federal Facilities Information System

FFP: Firm Fixed Price

FGD: Flue-Gas Desulfurization

FID: Flame Ionization Detector

FIFRA: Federal Insecticide, Fungicide, and Rodenticide Act

FIM: Friable Insulation Material

FINDS: Facility Index System

FIP: Final Implementation Plan

FIPS: Federal Information Procedures System

FIT: Field Investigation Team

FLETC: Federal Law Enforcement Training Center

FLM: Federal Land Manager

FLP: Flash Point

FLPMA: Federal Land Policy and Management Act

FMAP: Financial Management Assistance Project

F/M: Food to Microorganism Ratio

FML: Flexible Membrane Liner

FMP: Facility Management Plan

FMP: Financial Management Plan

FMS: Financial Management System

FMVCP: Federal Motor Vehicle Control Program

FOE: Friends Of the Earth

FOIA: Freedom Of Information Act

FOISD: Fiber Optic Isolated Spherical Dipole Antenna

FONSI: Finding Of No Significant Impact

FORAST: Forest Response to Anthropogenic Stress

FP: Fine Particulate

FPA: Federal Pesticide Act

FPAS: Foreign Purchase Acknowledgement Statements

FPD: Flame Photometric Detector

FPEIS: Fine Particulate Emissions Information System

FPM: Federal Personnel Manual

FPPA: Federal Pollution Prevention Act

FPR: Federal Procurement Regulation

FPRS: Federal Program Resources Statement; Formal Planning  and Supporting System

FQPA: Food Quality Protection Act

FR: Federal Register. Final Rulemaking

FRA: Federal Register Act

FREDS: Flexible Regional Emissions Data System

FRES: Forest Range Environmental Study

FRM: Federal Reference Methods

FRN: Federal Register Notice. Final Rulemaking Notice

FRS: Formal Reporting System

FS: Feasibility Study

FSA: Food Security Act

FSS: Facility Status Sheet; Federal Supply Schedule

FTP: Federal Test Procedure (for motor vehicles)

FTS: File Transfer Service

FTTS: FIFRA/TSCA Tracking System

FUA: Fuel Use Act

FURS: Federal Underground Injection Control Reporting System

FVMP: Federal Visibility Monitoring Program

FWCA: Fish and Wildlife Coordination Act

FWPCA: Federal Water Pollution and Control Act (aka CWA). Federal Water Pollution and Control Administration

FY: Fiscal Year

GAAP: Generally Accepted Accounting Principles

GAC: Granular Activated Carbon

GACT: Granular Activated Carbon Treatment

GAW: Global Atmospheric Watch

GCC: Global Climate Convention

GC/MS: Gas Chromatograph/ Mass Spectograph

GCVTC: Grand Canyon Visibility Transport Commission

GCWR: Gross Combination Weight Rating

GDE: Generic Data Exemption

GEI: Geographic Enforcement Initiative

GEMI: Global Environmental Management Initiative

GEMS: Global Environmental Monitoring System; Graphical Exposure Modeling System

GEP: Good Engineering Practice

GFF: Glass Fiber Filter

GFO: Grant Funding Order

GFP: Government-Furnished Property

GICS: Grant Information and Control System

GIS: Geographic Information Systems; Global Indexing System

GLC: Gas Liquid Chromatography

GLERL: Great Lakes Environmental Research Laboratory

GLNPO: Great Lakes National Program Office

GLP: Good Laboratory Practices

GLWQA: Great Lakes Water Quality Agreement

GMCC: Global Monitoring for Climatic Change

G/MI: Grams per mile

GOCO: Government-Owned/ Contractor-Operated

GOGO: Government-Owned/ Government-Operated

GOP: General Operating Procedures

GOPO: Government-Owned/ Privately-Operated

GPAD: Gallons-per-acre per-day

GPG: Grams-per-Gallon

GPR: Ground-Penetrating Radar

GPRA: Government Performance and Results Act

GPS: Groundwater Protection Strategy

GR: Grab Radon Sampling

GRAS: Generally Recognized as Safe

GRCDA: Government Refuse Collection and Disposal Association

GRGL: Groundwater Residue Guidance Level

GT: Gas Turbine

GTN: Global Trend Network

GTR: Government Transportation Request

GVP: Gasoline Vapor Pressure

GVW: Gross Vehicle Weight

GVWR: Gross Vehicle Weight Rating

GW: Grab Working-Level Sampling. Groundwater

GWDR: Ground Water Disinfection Rule

GWM: Groundwater Monitoring

GWP: Global Warming Potential

GWPC: Ground Water Protection Council

GWPS: Groundwater Protection Standard; Groundwater Protection Strategy

HA: Health Advisory

HAD: Health Assessment Document

HAP: Hazardous Air Pollutant

HAPEMS: Hazardous Air Pollutant Enforcement Management System

HAPPS: Hazardous Air Pollutant Prioritization System

HATREMS: Hazardous and Trace Emissions System

HAZMAT: Hazardous Materials

HAZOP: Hazard and Operability Study

HBFC: Hydrobromofluorocarbon

HC: Hazardous Constituents; Hydrocarbon

HCCPD: Hexachlorocyclo-pentadiene

HCFC: Hydrochlorofluorocarbon

HCP: Hypothermal Coal Process

HDD: Heavy-Duty Diesel

HDDT: Heavy-duty Diesel Truck

HDDV: Heavy-Duty Diesel Vehicle

HDE: Heavy-Duty Engine

HDG: Heavy-Duty Gasoline-Powered Vehicle

HDGT: Heavy-Duty Gasoline Truck

HDGV: Heavy-Duty Gasoline Vehicle

HDPE: High Density Polyethylene

HDT: Highest Dose Tested in a study. Heavy-Duty Truck

HDV: Heavy-Duty Vehicle

HEAL: Human Exposure Assessment Location

HECC: House Energy and Commerce Committee

HEI: Health Effects Institute

HEM: Human Exposure Modeling

HEPA: High-Efficiency Particulate Air

HEPA: Highly Efficient Particulate Air Filter

HERS: Hyperion Energy Recovery System

HFC: Hydrofluorocarbon

HHDDV: Heavy Heavy-Duty Diesel Vehicle

HHE: Human Health and the Environment

HHV: Higher Heating Value

HI: Hazard Index

HI-VOL: High-Volume Sampler

HIWAY: A Line Source Model for Gaseous Pollutants

HLRW: High Level Radioactive Waste

HMIS: Hazardous Materials Information System

HMS: Highway Mobile Source

HMTA: Hazardous Materials Transportation Act

HMTR: Hazardous Materials Transportation Regulations

HOC: Halogenated Organic Carbons

HON: Hazardous Organic NESHAP

HOV: High-Occupancy Vehicle

HP: Horse Power

HPLC: High-Performance Liquid Chromatography

HPMS: Highway Performance Monitoring System

HPV: High Priority Violator

HQCDO: Headquarters Case Development Officer

HRS: Hazardous Ranking System

HRUP: High-Risk Urban Problem

HSDB: Hazardous Substance Data Base

HSL: Hazardous Substance List

HSWA: Hazardous and Solid Waste Amendments

HT: Hypothermally Treated

HTP: High Temperature and Pressure

HVAC: Heating, Ventilation, and Air-Conditioning system

HVIO: High Volume Industrial Organics

HW: Hazardous Waste

HWDMS: Hazardous Waste Data Management System

HWGTF: Hazardous Waste Groundwater Task Force; Hazardous Waste Groundwater Test Facility

HWIR: Hazardous Waste Identification Rule

HWLT: Hazardous Waste Land Treatment

HWM: Hazardous Waste Management

HWRTF: Hazardous Waste Restrictions Task Force

HWTC: Hazardous Waste Treatment Council

I/A: Innovative/Alternative

IA: Interagency Agreement

IAAC: Interagency Assessment Advisory Committee

IADN: Integrated Atmospheric Deposition Network

IAG: Interagency Agreement

IAP: Incentive Awards Program. Indoor Air Pollution

IAQ: Indoor Air Quality

IARC: International Agency for Research on Cancer

IATDB: Interim Air Toxics Data Base

IBSIN: Innovations in Building Sustainable Industries

IBT: Industrial Biotest Laboratory

IC: Internal Combustion

ICAIR: Interdisciplinary Planning and Information Research

ICAP: Inductively Coupled Argon Plasma

ICB: Information Collection Budget

ICBN: International Commission on the Biological Effects of Noise

ICCP: International Climate Change Partnership

ICE: Industrial Combustion Emissions Model. Internal Combustion Engine

ICP: Inductively Coupled Plasma

ICR: Information Collection Request

ICRE: Ignitability, Corrosivity, Reactivity, Extraction

ICRP: International Commission on Radiological Protection

ICRU: International Commission of Radiological Units and Measurements

ICS: Incident Command System. Institute for Chemical Studies; Intermittent Control Strategies.; Intermittent Control System

ICWM: Institute for Chemical Waste Management

IDEA: Integrated Data for Enforcement Analysis

IDLH: Immediately Dangerous to Life and Health

IEB: International Environment Bureau

IEMP: Integrated Environmental Management Project

IES: Institute for Environmental Studies

IFB: Invitation for Bid

IFCAM: Industrial Fuel Choice Analysis Model

IFCS: International Forum on Chemical Safety

IFIS: Industry File Information System

IFMS: Integrated Financial Management System

IFPP: Industrial Fugitive Process Particulate

IGCC: Integrated Gasification Combined Cycle

IGCI: Industrial Gas Cleaning Institute

IIS: Inflationary Impact Statement

IINERT: In-Place Inactivation and Natural Restoration Technologies

IJC: International Joint Commission (on Great Lakes)

I/M: Inspection/Maintenance

IMM: Intersection Midblock Model

IMPACT: Integrated Model of Plumes and Atmosphere in Complex Terrain

IMPROVE: Interagency Monitoring of Protected Visual Environment

INPUFF: Gaussian Puff Dispersion Model

INT: Intermittent

IOB: Iron Ore Beneficiation

IOU: Input/Output Unit

IPCS: International Program on Chemical Safety

IP: Inhalable Particles

IPM: Inhalable Particulate Matter. Integrated Pest Management

IPP: Implementation Planning Program. Integrated Plotting Package; Inter-media Priority Pollutant (document); Independent Power Producer

IPCC: Intergovernmental Panel on Climate Change

IPM: Integrated Pest Management

IRG: Interagency Review Group

IRLG: Interagency Regulatory Liaison Group (Composed of EPA, CPSC, FDA, and OSHA)

IRIS: Instructional Resources Information System. Integrated Risk Information System

IRM: Intermediate Remedial Measures

IRMC: Inter-Regulatory Risk Management Council

IRP: Installation Restoration Program

IRPTC: International Register of Potentially Toxic Chemicals

IRR: Institute of Resource Recovery

IRS: International Referral Systems

IS: Interim Status

ISAM: Indexed Sequential File Access Method

ISC: Industrial Source Complex

ISCL: Interim Status Compliance Letter

ISCLT: Industrial Source Complex Long Term Model

ISCST: Industrial Source Complex Short Term Model

ISD: Interim Status Document

ISE: Ion-specific electrode

ISMAP: Indirect Source Model for Air Pollution

ISO: International Organization for Standardization

ISPF: (IBM) Interactive System Productivity Facility

ISS: Interim Status Standards

ITC:Innovative Technology Council

ITC: Interagency Testing Committee

ITRC: Interstate Technology Regulatory Coordination

ITRD: Innovative Treatment Remediation Demonstration

IUP: Intended Use Plan

IUR: Inventory Update Rule

IWC: In-Stream Waste Concentration

IWS: Ionizing Wet Scrubber