A&I

Alternative and Innovative (Wastewater Treatment System)

AA

Accountable Area; Adverse Action; Advices of Allowance; Assistant Administrator; Associate Administrator; Atomic Absorption

AAEE

American Academy of Environmental Engineers

AANWR

Alaskan Arctic National Wildlife Refuge

AAP

Asbestos Action Program

AAPCO

American Association of Pesticide Control Officials

AARC

Alliance for Acid Rain Control

ABEL

EPA's computer model for analyzing a violator's ability to pay a civil penalty.

ABES

Alliance for Balanced Environmental Solutions

AC

Actual Commitment. Advisory Circular

A&C

Abatement and Control

ACA

American Conservation Association

ACBM

Asbestos-Containing Building Material

ACE

Alliance for Clean Energy

ACE

Any Credible Evidence

ACEEE

American Council for an Energy Efficient Economy

ACFM

Actual Cubic Feet Per Minute

ACL

Alternate Concentration Limit. Analytical Chemistry Laboratory

ACM

Asbestos-Containing Material

ACP

Agriculture Control Program (Water Quality Management)

Air Carcinogen Policy

ACQUIRE

Aquatic Information Retrieval

ACQR

Air Quality Control Region

ACS

American Chemical Society

ACT

Action

ACTS

Asbestos Contractor Tracking System

ACWA

American Clean Water Association

ACWM

Asbestos-Containing Waste Material

ADABA

Acceptable Data Base

ADB

Applications Data Base

ADI

Acceptable Daily Intake

ADP

AHERA Designated Person; Automated Data Processing

ADQ

Audits of Data Quality

ADR

Alternate Dispute Resolution

ADSS

Air Data Screening System

ADT

Average Daily Traffic

AEA

Atomic Energy Act

AEC

Associate Enforcement Counsels

AEE

Alliance for Environmental Education

AEERL

Air and Energy Engineering Research Laboratory

AEM

Acoustic Emission Monitoring

AERE

Association of Environmental and Resource Economists

AES

Auger Electron Spectrometry

AFA

American Forestry Association

AFCA

Area Fuel Consumption Allocation

AFCEE

Air Force Center for Environmental Excellence

AFS

AIRS Facility Subsystem

AFUG

AIRS Facility Users Group

AH

Allowance Holders

AHERA

Asbestos Hazard Emergency Response Act

AHU

Air Handling Unit

AI

Active Ingredient

AIC

Active to Inert Conversion

AICUZ

Air Installation Compatible Use Zones

AID

Agency for International Development

AIHC

American Industrial Health Council

AIP

Auto Ignition Point

AIRMON

Atmospheric Integrated Research Monitoring Network

AIRS

Aerometric Information Retrieval System

AL

Acceptable Level

ALA

Delta-Aminolevulinic Acid

ALA-O

Delta-Aminolevulinic Acid Dehydrates

ALAPO

Association of Local Air Pollution Control Officers

ALARA

As Low As Reasonably Achievable

ALC

Application Limiting Constituent

ALJ

Administrative Law Judge

ALMS

Atomic Line Molecular Spectroscopy

ALR

Action Leakage Rate

AMBIENS

Atmospheric Mass Balance of Industrially Emitted and Natural Sulfur

AMOS

Air Management Oversight System

AMPS

Automatic Mapping and Planning System

AMSA

Association of Metropolitan Sewer Agencies

ANC

Acid Neutralizing Capacity

ANPR

Advance Notice of Proposed Rulemaking

ANRHRD

Air, Noise, & Radiation Health Research Division/ORD

ANSS

American Nature Study Society

AOAC

Association of Official Analytical Chemists

AOC

Abnormal Operating Conditions

AOD

Argon-Oxygen Decarbonization

AOML

Atlantic Oceanographic and Meteorological Laboratory

AP

Accounting Point

APA

Administrative Procedures Act

APCA

Air Pollution Control Association

APCD

Air Pollution Control District

APDS

Automated Procurement Documentation System

APHA

American Public Health Association

APRAC

Urban Diffusion Model for Carbon Monoxide from Motor Vehicle Traffic

APTI

Air Pollution Training Institute

APWA

American Public Works Association

AQ-7

Non-reactive Pollutant Modelling

AQCCT

Air-Quality Criteria and Control Techniques

AQCP

Air Quality Control Program

AQCR

Air-Quality Control Region

AQD

Air-Quality Digest

AQDHS

Air-Quality Data Handling System

AQDM

Air-Quality Display Model

AQMA

Air-Quality Maintenance Area

AQMD

Air Quality Management District

AQMP

Air-Quality Maintenance Plan; Air-Quality Management Plan

AQSM

Air-Quality Simulation Model

AQTAD

Air-Quality Technical Assistance Demonstration

AR

Administrative Record

A&R

Air and Radiation

ARA

Assistant Regional Administrator; Associate Regional Administrator

ARAC

Acid Rain Advisory Committee

ARAR

Applicable or Relevant and Appropriate Standards, Limitations, Criteria, and Requirements

ARB

Air Resources Board

ARC

Agency Ranking Committee

ARCC

American Rivers Conservation Council

ARCS

Alternative Remedial Contract Strategy

ARG

American Resources Group

ARIP

Accidental Release Information Program

ARL

Air Resources Laboratory

ARM

Air Resources Management

ARNEWS

Acid Rain National Early Warning Systems

ARO

Alternate Regulatory Option

ARRP

Acid Rain Research Program

ARRPA

Air Resources Regional Pollution Assessment Model

ARS

Agricultural Research Service

ARZ

Auto Restricted Zone

AS

Area Source

ASC

Area Source Category

ASDWA

Association of State Drinking Water Administrators

ASHAA

Asbestos in Schools Hazard Abatement Act

ASHRAE

American Society of Heating, Refrigerating, and Air-Conditioning Engineers

ASIWCPA

Association of State and Interstate Water Pollution Control Administrators

ASMDHS

Airshed Model Data Handling System

ASRL

Atmospheric Sciences Research Laboratory

AST

Advanced Secondary (Wastewater) Treatment

ASTHO

Association of State and Territorial Health Officers

ASTM

American Society for Testing and Materials

ASTSWMO

Association of State and Territorial Solid Waste Management Officials

AT

Advanced Treatment. Alpha Track Detection

ATERIS

Air Toxics Exposure and Risk Information System

ATS

Action Tracking System; Allowance Tracking System

ATSDR

Agency for Toxic Substances and Disease Registry

ATTF

Air Toxics Task Force

AUSM

Advanced Utility Simulation Model

A/WPR

Air/Water Pollution Report

AWRA

American Water Resources Association

AWT

Advanced Wastewater Treatment

AWWA

American Water Works Association

AWWARF

American Water Works Association Research Foundation.

B

BAA

Board of Assistance Appeals

BAC

Bioremediation Action Committee; Biotechnology Advisory Committee

BACM

Best Available Control Measures

BACT

Best Available Control Technology

BADT

Best Available Demonstrated Technology

BAF

Bioaccumulation Factor

BaP

Benzo(a)Pyrene

BAP

Benefits Analysis Program

BART

Best Available Retrofit Technology

BASIS

Battelle's Automated Search Information System

BAT

Best Available Technology

BATEA

Best Available Treatment Economically Achievable

BCT

Best Control Technology

BCPCT

Best Conventional Pollutant Control Technology

BDAT

Best Demonstrated Achievable Technology

BDCT

Best Demonstrated Control Technology

BDT

Best Demonstrated Technology

BEJ

Best Engineering Judgement. Best Expert Judgment

BF

Bonafide Notice of Intent to Manufacture or Import (IMD/OTS)

BID

Background Information Document. Buoyancy Induced Dispersion

BIOPLUME

Model to Predict the Maximum Extent of Existing Plumes

BMP

Best Management Practice(s)

BMR

Baseline Monitoring Report

BO

Budget Obligations

BOA

Basic Ordering Agreement (Contracts)

BOD

Biochemical Oxygen Demand. Biological Oxygen Demand

BOF

Basic Oxygen Furnace

BOP

Basic Oxygen Process

BOPF

Basic Oxygen Process Furnace

BOYSNC

Beginning of Year Significant Non-Compliers

BP

Boiling Point

BPJ

Best Professional Judgment

BPT

Best Practicable Technology. Pest Practicable Treatment

BPWTT

Best Practical Wastewater Treatment Technology

BRI

Building-Related Illness

BRS

Bibliographic Retrieval Service

BSI

British Standards Institute

BSO

Benzene Soluble Organics

BTZ

Below the Treatment Zone

BUN

Blood Urea Nitrogen

C

CA

Citizen Act. Competition Advocate. Cooperative Agreements. Corrective Action

CAA

Clean Air Act; Compliance Assurance Agreement

CAAA

Clean Air Act Amendments

CAER

Community Awareness and Emergency Response

CAFE

Corporate Average Fuel Economy

CAFO

Concentrated Animal Feedlot; Consent Agreement/Final Order

CAG

Carcinogenic Assessment Group

CAIR

Comprehensive Assessment of Information Rule

CALINE

California Line Source Model

CAM

Compliance Assurance Monitoring rule; Compliance Assurance Monitoring

CAMP

Continuous Air Monitoring Program

CAN

Common Account Number

CAO

Corrective Action Order

CAP

Corrective Action Plan. Cost Allocation Procedure. Criteria Air Pollutant

>CAPMoN

Canadian Air and Precipitation Monitoring Network

CAR

Corrective Action Report

CAS

Center for Automotive Safety; Chemical Abstract Service

CASAC

Clean Air Scientific Advisory Committee

CASLP

Conference on Alternative State and Local Practices

CASTNet

Clean Air Status and Trends Network

CATS

Corrective Action Tracking System

CAU

Carbon Adsorption Unit; Command Arithmetic Unit

CB

Continuous Bubbler

CBA

Chesapeake Bay Agreement. Cost Benefit Analysis

CBD

Central Business District

CBEP

Community Based Environmental Project

CBI

Compliance Biomonitoring Inspection; Confidential Business Information

CBOD

Carbonaceous Biochemical Oxygen Demand

CBP

Chesapeake Bay Program; County Business Patterns

CCA

Competition in Contracting Act

CCAA

Canadian Clean Air Act

CCAP

Center for Clean Air Policy; Climate Change Action Plan

CCEA

Conventional Combustion Environmental Assessment

CCHW

Citizens Clearinghouse for Hazardous Wastes

CCID

Confidential Chemicals Identification System

CCMS/NATO

Committee on Challenges of a Modern Society/North Atlantic Treaty Organization

CCP

Composite Correction Plan

CC/RTS

Chemical Collection/ Request Tracking System

CCTP

Clean Coal Technology Program

CD

Climatological Data

CDB

Consolidated Data Base

CDBA

Central Data Base Administrator

CDBG

Community Development Block Grant

CDD

Chlorinated dibenzo-p-dioxin

CDF

Chlorinated dibenzofuran

CDHS

Comprehensive Data Handling System

CDI

Case Development Inspection

CDM

Climatological Dispersion Model; Comprehensive Data Management

CDMQC

Climatological Dispersion Model with Calibration and Source Contribution

CDNS

Climatological Data National Summary

CDP

Census Designated Places

CDS

Compliance Data System

CE

Categorical Exclusion. Conditionally Exempt Generator

CEA

Cooperative Enforcement Agreement; Cost and Economic Assessment

CEAT

Contractor Evidence Audit Team

CEARC

Canadian Environmental Assessment Research Council

CEB

Chemical Element Balance

CEC

Commission for Environmental Cooperation

CECATS

CSB Existing Chemicals Assessment Tracking System

CEE

Center for Environmental Education

CEEM

Center for Energy and Environmental Management

CEI

Compliance Evaluation Inspection

CELRF

Canadian Environmental Law Research Foundation

CEM

Continuous Emission Monitoring

CEMS

Continuous Emission Monitoring System

CEPA

Canadian Environmental Protection Act

CEPP

Chemical Emergency Preparedness Plan

CEQ

Council on Environmental Quality

CERCLA

Comprehensive Environmental Response, Compensation, and Liability Act (1980)

CERCLIS

Comprehensive Environmental Response, Compensation, and Liability Information System

CERT

Certificate of Eligibility

CESQG

Conditionally Exempt Small Quantity Generator

CEST

Community Environmental Service Teams

CF

Conservation Foundation

CFC

Chlorofluorocarbons

CFM

Chlorofluoromethanes

CFR

Code of Federal Regulations

CHABA

Committee on Hearing and Bio-Acoustics

CHAMP

Community Health Air Monitoring Program

CHEMNET

Chemical Industry Emergency Mutual Aid Network

CHESS

Community Health and Environmental Surveillance System

CHIP

Chemical Hazard Information Profiles

CI

Compression Ignition. Confidence Interval

CIAQ

Council on Indoor Air Quality

CIBL

Convective Internal Boundary Layer

CICA

Competition in Contracting Act

CICIS

Chemicals in Commerce Information System

CIDRS

Cascade Impactor Data Reduction System

CIMI

Committee on Integrity and Management Improvement

CIS

Chemical Information System. Contracts Information System

CKD

Cement Kiln Dust

CKRC

Cement Kiln Recycling Coalition

CLC

Capacity Limiting Constituents

CLEANS

Clinical Laboratory for Evaluation and Assessment of Toxic Substances

CLEVER

Clinical Laboratory for Evaluation and Validation of Epidemiologic Research

CLF

Conservation Law Foundation

CLI

Consumer Labelling Initiative

CLIPS

Chemical List Index and Processing System

CLP

Contract Laboratory Program

CM

Corrective Measure

CMA

Chemical Manufacturers Association

CMB

Chemical Mass Balance

CME

Comprehensive Monitoring Evaluation

CMEL

Comprehensive Monitoring Evaluation Log

CMEP

Critical Mass Energy Project

CNG

Compressedd Natural Gas

COCO

Contractor-Owned/ Contractor-Operated

COD

Chemical Oxygen Demand

COH

Coefficient Of Haze

CPDA

Chemical Producers and Distributor Association

CPF

Carcinogenic Potency Factor

CPO

Certified Project Officer

CQA

Construction Quality Assurance

CR

Continuous Radon Monitoring

CROP

Consolidated Rules of Practice

CRP

Child-Resistant Packaging; Conservation Reserve Program

CRR

Center for Renewable Resources

CRSTER

Single Source Dispersion Model

CSCT

Committee for Site Characterization

CSGWPP

Comprehensive State Ground Water Protection Program

CSI

Common Sense Initiative; Compliance Sampling Inspection

CSIN

Chemical Substances Information Network

CSMA

Chemical Specialties Manufacturers Association

CSO

Combined Sewer Overflow

CSPA

Council of State Planning Agencies

CSRL

Center for the Study of Responsive Law

CTARC

Chemical Testing and Assessment Research Commission

CTG

Control Techniques Guidelines

CTSA

Cleaner TechnologiesSubstitutess Assessment

CV

Chemical Vocabulary

CVS

Constant Volume Sampler

CW

Continuous working-level monitoring

CWA

Clean Water Act (aka FWPCA)

CWAP

Clean Water Action Project

CWTC

Chemical Waste Transportation Council

CZMA

Coastal Zone Management Act

CZARA

Coastal Zone Management Act Reauthorization Amendments

D

DAPSS

Document and Personnel Security System (IMD)

DBP

Disinfection By-Product

DCI

Data Call-In

DCO

Delayed Compliance Order

DCO

Document Control Officer

DDT

DichloroDiphenylTrichloroethane

DERs

Data Evaluation Records

DES

Diethylstilbesterol

DfE

Design for the Environment

DI

Diagnostic Inspection

DMR

Discharge Monitoring Report

DNA

Deoxyribonucleic acid

DNAPL

Dense Non-Aqueous Phase Liquid

DO

Dissolved Oxygen

DOW

Defenders Of Wildlife

DPA

Deepwater Ports Act

DPD

Method of Measuring Chlorine Residual in Water

DQO

Data Quality Objective

DRE

Destruction and Removal Efficiency

DRES

Dietary Risk Evaluation System

DRMS

Defense Reutilization and Marketing Service

DRR

Data Review Record

DS

Dichotomous Sampler

DSAP

Data Self Auditing Program

DSCF

Dry Standard Cubic Feet

DSCM

Dry Standard Cubic Meter

DSS

Decision Support System; Domestic Sewage Study

DT

Detectors (radon) damaged or lost; Detention Time

DU

Decision Unit. Ducks Unlimited; Dobson Unit

DUC

Decision Unit Coordinator

DWEL

Drinking Water Equivalent Level

DWS

Drinking Water Standard

DWSRF

Drinking Water State Revolving Fund

E

EA

Endangerment Assessment; Enforcement Agreement; Environmental Action; Environmental Assessment;. Environmental Audit

EAF

Electric Arc Furnaces

EAG

Exposure Assessment Group

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

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

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

F

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

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

G

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

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

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

H

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

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

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

J

JAPCA

Journal of Air Pollution Control Association

JCL

Job Control Language

JEC

Joint Economic Committee

JECFA

Joint Expert Committee of Food Additives

JEIOG

Joint Emissions Inventory Oversight Group

JLC

Justification for Limited Competition

JMPR

Joint Meeting on Pesticide Residues

JNCP

Justification for Non-Competitive Procurement

JOFOC

Justification for Other Than Full and Open Competition

JPA

Joint Permitting Agreement

JSD

Jackson Structured Design

JSP

Jackson Structured Programming

JTU

Jackson Turbidity Unit

L

LAA

Lead Agency Attorney

LADD

Lifetime Average Daily Dose; Lowest Acceptable Daily Dose

LAER

Lowest Achievable Emission Rate

LAI

Laboratory Audit Inspection

LAMP

Lake Acidification Mitigation Project

LC

Lethal Concentration. Liquid Chromatography

LCA

Life Cycle Assessment

LCD

Local Climatological Data

LCL

Lower Control Limit

LCM

Life Cycle Management

LCRS

Leachate Collection and Removal System

LD

Land Disposal. Light Duty

LD L0

The lowest dosage of a toxic substance that kills test organisms.

LDC

London Dumping Convention

LDCRS

Leachate Detection, Collection, and Removal System

LDD

Light-Duty Diesel

LDDT

Light-Duty Diesel Truck

LDDV

Light-Duty Diesel Vehicle

LDGT

Light-Duty Gasoline Truck

LDIP

Laboratory Data Integrity Program

LDR

Land Disposal Restrictions

LDRTF

Land Disposal Restrictions Task Force

LDS

Leak Detection System

LDT

Lowest Dose Tested. Light-Duty Truck

LDV

Light-Duty Vehicle

LEL

Lowest Effect Level. Lower Explosive Limit

LEP

Laboratory Evaluation Program

LEPC

Local Emergency Planning Committee

LERC

Local Emergency Response Committee

LEV

Low Emissions Vehicle

LFG

Landfill Gas

LFL

Lower Flammability Limit

LGR

Local Governments Reimbursement Program

LHDDV

Light Heavy-Duty Diesel Vehicle

LI

Langelier Index

LIDAR

Light Detection and Ranging

LIMB

Limestone-Injection Multi-Stage Burner

LLRW

Low Level Radioactive Waste

LMFBR

Liquid Metal Fast Breeder Reactor

LMOP

Landfill Methane Outreach Program

LNAPL

Light Non-Aqueous Phase Liquid

LOAEL

Lowest-Observed-Adverse-Effect-Level

LOD

Limit of Detection

LQER

Lesser Quantity Emission Rates

LQG

Large Quantity Generator

LRTAP

Long Range Transboundary Air Pollution

LUIS

Label Use Information System

M

MAC

Mobile Air Conditioner

MAPSIM

Mesoscale Air Pollution Simulation Model

MATC

Maximum Acceptable Toxic Concentration

MBAS

Methylene-Blue-Active Substances

MCL

Maximum Contaminant Level

MCLG

Maximum Contaminant Level Goal

MCS

Multiple Chemical Sensitivity

MDL

Method Detection Limit

MEC

Model Energy Code

MEI

Maximally (or most) Exposed Individual

MEP

Multiple Extraction Procedure

MHDDV

Medium Heavy-Duty Diesel Vehicle

MOBILE5A

Mobile Source Emission Factor Model

MOE

Margin Of Exposure

MOS

Margin of Safety

MP

Manufacturing-use Product; Melting Point

MPCA

Microbial Pest Control Agent

MPI

Maximum Permitted Intake

MPN

Maximum Possible Number

MPWC

Multiprocess Wet Cleaning

MRF

Materials Recovery Facility

MRID

Master Record Identification number

MRL

Maximum-Residue Limit (Pesticide Tolerance)

MSW

Municipal Solid Waste

MTD

Maximum Tolerated Dose

MUP

Manufacturing-Use Product

MUTA

Mutagenicity

MWC

Machine Wet Cleaning

N

NAA

Nonattainment Area

NAAEC

North American Agreement on Environmental Cooperation

NAAQS

National Ambient Air Quality Standards

NACA

National Agricultural Chemicals Association

NACEPT

National Advisory Council for Environmental Policy and Technology

NADP/NTN

National Atmospheric Deposition Program/National Trends Network

NAMS

National Air Monitoring Stations

NAPAP

National Acid Precipitation Assessment Program

NAPL

Non-Aqueous Phase Liquid

NAPS

National Air Pollution Surveillance

NARA

National Agrichemical Retailers Association

NARSTO

North American Research Strategy for Tropospheric Ozone

NAS

National Academy of Sciences

NASDA

National Association of State Departments of Agriculture

NCAMP

National Coalition Against the Misuse of Pesticides

NCEPI

National Center for Environmental Publications and Information

NCWS

Non-Community Water System

NEDS

National Emissions Data System

NEPI

National Environmental Policy Institute

NEPPS

National Environmental Performance Partnership System

NESHAP

National Emission Standard for Hazardous Air Pollutants

NIEHS

National Institute for Environmental Health Sciences

NETA

National Environmental Training Association

NFRAP

No Further Remedial Action Planned

NICT

National Incident Coordination Team

NIOSH

National Institute of Occupational Safety and Health

NIPDWR

National Interim Primary Drinking Water Regulations

NISAC

National Industrial Security Advisory Committee

NMHC

Nonmethane Hydrocarbons

NMOC

Non-Methane Organic Component

NMVOC

Non-methane Volatile Organic Chemicals

NO

Nitric Oxide

NOA

Notice of Arrival

NOAA

National Oceanographic and Atmospheric Agency

NOAC

Nature of Action Code

NOAEL

No Observable Adverse Effect Level

NOEL

No Observable Effect Level

NOIC

Notice of Intent to Cancel

NOIS

Notice of Intent to Suspend

N2O

Nitrous Oxide

NOx

Nitrogen Oxides

NORM

Naturally Occurring Radioactive Material

NPCA

National Pest Control Association>

NPDES

National Pollutant Discharge Elimination System

NPHAP

National Pesticide Hazard Assessment Program

NPIRS

National Pesticide Information Retrieval System

NPTN

National Pesticide Telecommunications Network

NRD

Natural Resource Damage

NRDC

Natural Resources Defense Council

NSDWR

National Secondary Drinking Water Regulations

NSEC

National System for Emergency Coordination

NSEP

National System for Emergency Preparedness

NSPS

New Source Performance Standards

NSR

New Source Review

NTI

National Toxics Inventory

NTIS

National Technical Information Service

NTNCWS

Non-Transient Non-Community Water System

NTP

National Toxicology Program

NTU

Nephlometric Turbidity Unit

O

O3

Ozone

OCD

Offshore and Coastal Dispersion

ODP

Ozone-Depleting Potential

ODS

Ozone-Depleting Substances

OECD

Organization for Economic Cooperation and Development

OF

Optional Form

OLTS

On Line Tracking System

O&M

Operations and Maintenance

ORM

Other Regulated Material

ORP

Oxidation-Reduction Potential

OTAG

Ozone Transport Assessment Group

OTC

Ozone Transport Commission

OTR

Ozone Transport Region

P

P2

Pollution Prevention

PAG

Pesticide Assignment Guidelines

PAH

Polynuclear Aromatic Hydrocarbons

PAl

Performance Audit Inspection (CWA); Pure Active Ingredient compound

PAM

Pesticide Analytical Manual

PAMS

Photochemical Assessment Monitoring Stations

PAT

Permit Assistance Team (RCRA)

PATS

Pesticide Action Tracking System; Pesticides Analytical Transport Solution

Pb

Lead

PBA

Preliminary Benefit Analysis (BEAD)

PCA

Principle Component Analysis

PCB

Polychlorinated Biphenyl

PCE

Perchloroethylene

PCM

Phase Contrast Microscopy

PCN

Policy Criteria Notice

PCO

Pest Control Operator

PCSD

President's Council on Sustainable Development

PDCI

Product Data Call-In

PFC

Perfluorated Carbon

PFCRA

Program Fraud Civil Remedies Act

PHC

Principal Hazardous Constituent

PHI

Pre-Harvest Interval

PHSA

Public Health Service Act

PI

Preliminary Injunction. Program Information

PIC

Products of Incomplete Combustion

PIGS

Pesticides in Groundwater Strategy

PIMS

Pesticide Incident Monitoring System

PIN

Pesticide Information Network

PIN

Procurement Information Notice

PIP

Public Involvement Program

PIPQUIC

Program Integration Project Queries Used in Interactive Command

PIRG

Public Interest Research Group

PIRT

Pretreatment Implementation Review Task Force

PIT

Permit Improvement Team

PITS

Project Information Tracking System

PLIRRA

Pollution Liability Insurance and Risk Retention Act

PLM

Polarized Light Microscopy

PLUVUE

Plume Visibility Model

PM

Particulate Matter

PMAS

Photochemical Assessment Monitoring Stations

PM2.5

Particulate Matter Smaller than 2.5 Micrometers in Diameter

PM10

Particulate Matter (nominally 10m and less)

PM15

Particulate Matter (nominally 15m and less)

PMEL

Pacific Marine Environmental Laboratory

PMN

Premanufacture Notification

PMNF

Premanufacture Notification Form

PMR

Pollutant Mass Rate

PMR

Proportionate Mortality Ratio

PMRS

Performance Management and Recognition System

PMS

Program Management System

PNA

Polynuclear Aromatic Hydrocarbons

PO

Project Officer

POC

Point Of Compliance

POE

Point Of Exposure

POGO

Privately-Owned/ Government-Operated

POHC

Principal Organic Hazardous Constituent

POI

Point Of Interception

POLREP

Pollution Report

POM

Particulate Organic Matter. Polycyclic Organic Matter

POP

Persistent Organic Pollutant

POR

Program of Requirements

POTW

Publicly Owned Treatment Works

POV

Privately Owned Vehicle

PP

Program Planning

PPA

Planned Program Accomplishment

PPB

Parts Per Billion

PPE

Personal Protective Equipment

PPG

Performance Partnership Grant

PPIC

Pesticide Programs Information Center

PPIS

Pesticide Product Information System; Pollution Prevention Incentives for States

PPMAP

Power Planning Modeling Application Procedure

PPM/PPB

Parts per million/ parts per billion

PPSP

Power Plant Siting Program

PPT

Parts Per Trillion

PPTH

Parts Per Thousand

PQUA

Preliminary Quantitative Usage Analysis

PR

Pesticide Regulation Notice; Preliminary Review

PRA

Paperwork Reduction Act; Planned Regulatory Action

PRATS

Pesticides Regulatory Action Tracking System

PRC

Planning Research Corporation

PRI

Periodic Reinvestigation

PRM

Prevention Reference Manuals

PRN

Pesticide Registration Notice

PRP

Potentially Responsible Party

PRZM

Pesticide Root Zone Model

PS

Point Source

PSAM

Point Source Ambient Monitoring

PSC

Program Site Coordinator

PSD

Prevention of Significant Deterioration

PSES

Pretreatment Standards for Existing Sources

PSI

Pollutant Standards Index; Pounds Per Square Inch; Pressure Per Square Inch

PSIG

Pressure Per Square Inch Gauge

PSM

Point Source Monitoring

PSNS

Pretreatment Standards for New Sources

PSU

Primary Sampling Unit

PTDIS

Single Stack Meteorological Model in EPA UNAMAP Series

PTE

Potential to Emit

PTFE

Polytetrafluoroethylene (Teflon)

PTMAX

Single Stack Meteorological Model in EPA UNAMAP series

PTPLU

Point Source Gaussian Diffusion Model

PUC

Public Utility Commission

PV

Project Verification

PVC

Polyvinyl Chloride

PWB

Printed Wiring Board

PWS

Public Water Supply/ System

PWSS

Public Water Supply System

Q

QAC

Quality Assurance Coordinator

QA/QC

Quality Assistance/ Quality Control

QAMIS

Quality Assurance Management and Information System

QAO

Quality Assurance Officer

QAPP

Quality Assurance Program (or Project) Plan

QAT

Quality Action Team

QBTU

Quadrillion British Thermal Units

QC

Quality Control

QCA

Quiet Communities Act

QCI

Quality Control Index

QCP

Quiet Community Program

QL

Quantification Limit

QNCR

Quarterly Noncompliance Report

QUA

Qualitative Use Assessment

QUIPE

Quarterly Update for Inspector in Pesticide Enforcement

R

RA

Reasonable Alternative; Regulatory Alternatives; Regulatory Analysis; Remedial Action; Resource Allocation; Risk Analysis; Risk Assessment

RAATS

RCRA Administrate Action Tracking System

RAC

Radiation Advisory Committee. Raw Agricultural Commodity; Regional Asbestos Coordinator. Response Action Coordinator

RACM

Reasonably Available Control Measures

RACT

Reasonably Available Control Technology

RAD

Radiation Adsorbed Dose (unit of measurement of radiation absorbed by humans)

RADM

Random Walk Advection and Dispersion Model; Regional Acid Deposition Model

RAM

Urban Air Quality Model for Point and Area Source in EPA UNAMAP Series

RAMP

Rural Abandoned Mine Program

RAMS

Regional Air Monitoring System

RAP

Radon Action Program; Registration Assessment Panel; Remedial Accomplishment Plan; Response Action Plan

RAPS

Regional Air Pollution Study

RARG

Regulatory Analysis Review Group

RAS

Routine Analytical Service

RAT

Relative Accuracy Test

RB

Request for Bid

RBAC

Re-use Business Assistance Center

RBC

Red Blood Cell

RC

Responsibility Center

RCC

Radiation Coordinating Council

RCDO

Regional Case Development Officer

RCO

Regional Compliance Officer

RCP

Research Centers Program

RCRA

Resource Conservation and Recovery Act

RCRIS

Resource Conservation and Recovery Information System

RD/RA

Remedial Design/ Remedial Action

R&D

Research and Development

RD&D

Research, Development and Demonstration

RDF

Refuse-Derived Fuel

RDNA

Recombinant DNA

RDU

Regional Decision Units

RDV

Reference Dose Values

RE

Reasonable Efforts; Reportable Event

REAP

Regional Enforcement Activities Plan

REE

Rare Earth Elements

REEP

Review of Environmental Effects of Pollutants

RECLAIM

Regional Clean Air Initiatives Marker

RED

Reregistration Eligibility Decision Document

REDA

Recycling Economic Development Advocate

ReFIT

Reinvention for Innovative Technologies

REI

Restricted Entry Interval

REM

(Roentgen Equivalent Man)

REM/FIT

Remedial/Field Investigation Team

REMS

RCRA Enforcement Management System

REP

Reasonable Efforts Program

REPS

Regional Emissions Projection System

RESOLVE

Center for Environmental Conflict Resolution

RF

Response Factor

RFA

Regulatory Flexibility Act

RFB

Request for Bid

RfC

Reference Concentration

RFD

Reference Dose Values

RFI

Remedial Field Investigation

RFP

Reasonable Further Programs. Request for Proposal

RHRS

Revised Hazard Ranking System

RI

Reconnaissance Inspection

RI

Remedial Investigation

RIA

Regulatory Impact Analysis; Regulatory Impact Assessment

RIC

Radon Information Center

RICC

Retirement Information and Counseling Center

RICO

Racketeer Influenced and Corrupt Organizations Act

RI/FS

Remedial Information/ Feasibility Study

RIM

Regulatory Interpretation Memorandum

RIN

Regulatory Identifier Number

RIP

RCRA Implementation Plan

RISC

Regulatory Information Service Center

RJE

Remote Job Entry

RLL

Rapid and Large Leakage (Rate)

RMCL

Recommended Maximum Contaminant Level (this phrase being discontinued in favor of MCLG)

RMDHS

Regional Model Data Handling System

RMIS

Resources Management Information System

RNA

Ribonucleic Acid

ROADCHEM

Roadway Version that Includes Chemical Reactions of BI, NO2, and O3

ROADWAY

A Model to Predict Pollutant Concentrations Near a Roadway

ROC

Record Of Communication

RODS

Records Of Decision System

ROG

Reactive Organic Gases

ROLLBACK

A Proportional Reduction Model

ROM

Regional Oxidant Model

ROMCOE

Rocky Mountain Center on Environment

ROP

Rate of Progress; Regional Oversight Policy

ROPA

Record Of Procurement Action

ROSA

Regional Ozone Study Area

RP

Radon Progeny Integrated Sampling. Respirable Particulates. Responsible Party

RPAR

Rebuttable Presumption Against Registration

RPM

Reactive Plume Model. Remedial Project Manager

RQ

Reportable Quantities

RRC

Regional Response Center

RRT

Regional Response Team; Requisite Remedial Technology

RS

Registration Standard

RSCC

Regional Sample Control Center

RSD

Risk-Specific Dose

RSE

Removal Site Evaluation

RTCM

Reasonable Transportation Control Measure

RTDF

Remediation Technologies Development Forum

RTDM

Rough Terrain Diffusion Model

RTECS

Registry of Toxic Effects of Chemical Substances

RTM

Regional Transport Model

RTP

Research Triangle Park

RUP

Restricted Use Pesticide

RVP

Reid Vapor Pressure

RWC

Residential Wood Combustion

S

S&A

Sampling and Analysis. Surveillance and Analysis

SAB

Science Advisory Board

SAC

Suspended and Cancelled Pesticides

SAEWG

Standing Air Emissions Work Group

SAIC

Special-Agents-In-Charge

SAIP

Systems Acquisition and Implementation Program

SAMI

Southern Appalachian Mountains Initiative

SAMWG

Standing Air Monitoring Work Group

SANE

Sulfur and Nitrogen Emissions

SANSS

Structure and Nomenclature Search System

SAP

Scientific Advisory Panel

SAR

Start Action Request. Structural Activity Relationship (of a qualitative assessment)

SARA

Superfund Amendments and Reauthorization Act of 1986

SAROAD

Storage and Retrieval Of Aerometric Data

SAS

Special Analytical Service. Statistical Analysis System

SASS

Source Assessment Sampling System

SAV

Submerged Aquatic Vegetation

SBC

Single Breath Cannister

SC

Sierra Club

SCAP

Superfund Consolidated Accomplishments Plan

SCBA

Self-Contained Breathing Apparatus

SCC

Source Classification Code

SCD/SWDC

Soil or Soil and Water Conservation District

SCFM

Standard Cubic Feet Per Minute

SCLDF

Sierra Club Legal Defense Fund

SCR

Selective Catalytic Reduction

SCRAM

State Consolidated RCRA Authorization Manual

SCRC

Superfund Community Relations Coordinator

SCS

Supplementary Control Strategy/System

SCSA

Soil Conservation Society of America

SCSP

Storm and Combined Sewer Program

SCW

Supercritical Water Oxidation

SDC

Systems Decision Plan

SDWA

Safe Drinking Water Act

SDWIS

Safe Drinking Water Information System

SBS

Sick Building Syndrome

SEA

State Enforcement Agreement

SEA

State/EPA Agreement

SEAM

Surface, Environment, and Mining

SEAS

Strategic Environmental Assessment System

SEDS

State Energy Data System

SEGIP

State Environmental Goals and Improvement Project

SEIA

Socioeconomic Impact Analysis

SEM

Standard Error of the Means

SEP

Standard Evaluation Procedures

SEP

Supplementary Environmental Project

SEPWC

Senate Environment and Public Works Committee

SERC

State Emergency Planning Commission

SES

Secondary Emissions Standard

SETAC

Society for Environmental Toxicology and Chemistry

SETS

Site Enforcement Tracking System

SF

Standard Form. Superfund

SFA

Spectral Flame Analyzers

SFDS

Sanitary Facility Data System

SFFAS

Superfund Financial Assessment System

SFIREG

State FIFRA Issues Research and Evaluation Group

SFS

State Funding Study

SHORTZ

Short Term Terrain Model

SHWL

Seasonal High Water Level

SI

International System of Units. Site Inspection. Surveillance Index. Spark Ignition

SIC

Standard Industrial Classification

SICEA

Steel Industry Compliance Extension Act

SIMS

Secondary Ion-Mass Spectrometry

SIP

State Implementation Plan

SITE

Superfund Innovative Technology Evaluation

SLAMS

State/Local Air Monitoring Station

SLN

Special Local Need

SLSM

Simple Line Source Model

SMART

Simple Maintenance of ARTS

SMCL

Secondary Maximum Contaminant Level

SMCRA

Surface Mining Control and Reclamation Act

SME

Subject Matter Expert

SMO

Sample Management Office

SMOA

Superfund Memorandum of Agreement

SMP

State Management Plan

SMR

Standardized Mortality Ratio

SMSA

Standard Metropolitan Statistical Area

SNA

System Network Architecture

SNAAQS

Secondary National Ambient Air Quality Standards

SNAP

Significant New Alternatives Project; Significant Noncompliance Action Program

SNARL

Suggested No Adverse Response Level

SNC

Significant Noncompliers

SNUR

Significant New Use Rule

SO

Sulfur Dioxide

SOC

Synthetic Organic Chemicals

SOCMI

Synthetic Organic Chemicals Manufacturing Industry

SOFC

Solid Oxide Fuel Cell

SOTDAT

Source Test Data

SOW

Scope Of Work

SPAR

Status of Permit Application Report

SPCC

Spill Prevention, Containment, and Countermeasure

SPE

Secondary Particulate Emissions

SPF

Structured Programming Facility

SPI

Strategic Planning Initiative

SPLMD

Soil-pore Liquid Monitoring Device

SPMS

Strategic Planning and Management System; Special Purpose Monitoring Stations

SPOC

Single Point Of Contact

SPS

State Permit System

SPSS

Statistical Package for the Social Sciences

SPUR

Software Package for Unique Reports

SQBE

Small Quantity Burner Exemption

SQG

Small Quantity Generator

SR

Special Review

SRAP

Superfund Remedial Accomplishment Plan

SRC

Solvent-Refined Coal

SRF

State Revolving Fund

SRM

Standard Reference Method

SRP

Special Review Procedure

SRR

Second Round Review. Submission Review Record

SRTS

Service Request Tracking System

SS

Settleable Solids. Superfund Surcharge. Suspended Solids

SSA

Sole Source Aquifer

SSAC

Soil Site Assimilated Capacity

SSC

State Superfund Contracts

SSD

Standards Support Document

SSEIS

Standard Support and Environmental Impact Statement;. Stationary Source Emissions and Inventory System.

SSI

Size Selective Inlet

SSMS

Spark Source Mass Spectrometry

SSO

Sanitary Sewer Overflow; Source Selection Official

SSRP

Source Reduction Review Project

SSTS

Section Seven Tracking System

SSURO

Stop Sale, Use and Removal Order

STALAPCO

State and Local Air-Pollution Control Officials

STAPPA

State and Territorial Air Pollution

STAR

Stability Wind Rose. State Acid Rain Projects

STARS

Strategic Targeted Activities for Results System

STEL

Short Term Exposure Limit

STEM

Scanning Transmission-Electron Microscope

STN

Scientific and Technical Information Network

STORET

Storage and Retrieval of Water-Related Data

STP

Sewage Treatment Plant. Standard Temperature and Pressure

STTF

Small Town Task Force (EPA)

SUP

Standard Unit of Processing

SURE

Sulfate Regional Experiment Program

SV

Sampling Visit; Significant Violater

SW

Slow Wave

SWAP

Source Water Assessment Program

SWARF

Waste from Metal Grinding Process

SWC

Settlement With Conditions

SWDA

Solid Waste Disposal Act

SWIE

Southern Waste Information Exchange

SWMU

Solid Waste Management Unit

SWPA

Source Water Protection Area

SWQPPP

Source Water Quality Protection Partnership Petitions

SWTR

Surface Water Treatment Rule

SYSOP

Systems Operator

T

TAD

Technical Assistance Document

TAG

Technical Assistance Grant

TALMS

Tunable Atomic Line Molecular Spectroscopy

TAMS

Toxic Air Monitoring System

TAMTAC

Toxic Air Monitoring System Advisory Committee

TAP

Technical Assistance Program

TAPDS

Toxic Air Pollutant Data System

TAS

Tolerance Assessment System

TBT

Tributyltin

TC

Target Concentration. Technical Center. Toxicity Characteristics. Toxic Concentration

TCDD

Dioxin (Tetrachlorodibenzo-p-dioxin)

TCDF

Tetrachlorodi-benzofurans

TCE

Trichloroethylene

TCF

Total Chlorine Free

TCLP

Total Concentrate Leachate Procedure. Toxicity Characteristic Leachate Procedure

TCM

Transportation Control Measure

TCP

Transportation Control Plan; Trichloropropane;

TCRI

Toxic Chemical Release Inventory

TD

Toxic Dose

TDS

Total Dissolved Solids

TEAM

Total Exposure Assessment Model

TEC

Technical Evaluation Committee

TED

Turtle Excluder Devices

TEG

Tetraethylene Glycol

TEGD

Technical Enforcement Guidance Document

TEL

Tetraethyl Lead

TEM

Texas Episodic Model

TEP

Typical End-use Product. Technical Evaluation Panel

TERA

TSCA Environmental Release Application

TES

Technical Enforcement Support

TEXIN

Texas Intersection Air Quality Model

TGO

Total Gross Output

TGAI

Technical Grade of the Active Ingredient

TGP

Technical Grade Product

THC

Total Hydrocarbons

THM

Trihalomethane

TI

Temporary Intermittent

TI

Therapeutic Index

TIBL

Thermal Internal Boundary Layer

TIC

Technical Information Coordinator. Tentatively Identified Compounds

TIM

Technical Information Manager

TIP

Technical Information Package

TIP

Transportation Improvement Program

TIS

Tolerance Index System

TISE

Take It Somewhere Else

TITC

Toxic Substance Control Act Interagency Testing Committee

TLV

Threshold Limit Value

TLV-C

TLV-Ceiling

TLV-STEL

TLV-Short Term Exposure Limit

TLV-TWA

TLV-Time Weighted Average

TMDL

Total Maximum Daily Limit; Total Maximum Daily Load

TMRC

Theoretical Maximum Residue Contribution

TNCWS

Transient Non-Community Water System

TNT

Trinitrotoluene

TO

Task Order

TOA

Trace Organic Analysis

TOC

Total Organic Carbon/ Compound

TOX

Tetradichloroxylene

TP

Technical Product; Total Particulates

TPC

Testing Priorities Committee

TPI

Technical Proposal Instructions

TPQ

Threshold Planning Quantity

TPSIS

Transportation Planning Support Information System

TPTH

Triphenyltinhydroxide

TPY

Tons Per Year

TQM

Total Quality Management

T-R

Transformer-Rectifier

TRC

Technical Review Committee

TRD

Technical Review Document

TRI

Toxic Release Inventory

TRIP

Toxic Release Inventory Program

TRIS

Toxic Chemical Release Inventory System

TRLN

Triangle Research Library Network

TRO

Temporary Restraining Order

TSA

Technical Systems Audit

TSCA

Toxic Substances Control Act

TSCATS

TSCA Test Submissions Database

TSCC

Toxic Substances Coordinating Committee

TSD

Technical Support Document

TSDF

Treatment, Storage, and Disposal Facility

TSDG

Toxic Substances Dialogue Group

TSI

Thermal System Insulation

TSM

Transportation System Management

TSO

Time Sharing Option

TSP

Total Suspended Particulates

TSS

Total Suspended (non-filterable) Solids

TTFA

Target Transformation Factor Analysis

TTHM

Total Trihalomethane

TTN

Technology Transfer Network

TTO

Total Toxic Organics

TTY

Teletypewriter

TVA

Tennessee Valley Authority

TVOC

Total Volatile Organic Compounds

TWA

Time Weighted Average

TWS

Transient Water System

TZ

Treatment Zone

U

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

UCC

Ultra Clean Coal

UCCI

Urea-Formaldehyde Foam Insulation

UCL

Upper Control Limit

UDMH

Unsymmetrical Dimethyl Hydrazine

UEL

Upper Explosive Limit

UF

Uncertainty Factor

UFL

Upper Flammability Limit

ug/m3

Micrograms Per Cubic Meter

UIC

Underground Injection Control

ULEV

Ultra Low Emission Vehicles

UMTRCA

Uranium Mill Tailings Radiation Control Act

UNAMAP

Users' Network for Applied Modeling of Air Pollution

UNECE

United Nations Economic Commission for Europe

UNEP

United Nations Environment Program

USC

Unified Soil Classification

USDA

United States Department of Agriculture

USDW

Underground Sources of Drinking Water

USFS

United States Forest Service

UST

Underground Storage Tank

UTM

Universal Transverse Mercator

UTP

Urban Transportation Planning

UV

Ultraviolet

UVA, UVB, UVC

Ultraviolet Radiation Bands

UZM

Unsaturated Zone Monitoring

V

VALLEY

Meteorological Model to Calculate Concentrations on Elevated Terrain

VCM

Vinyl Chloride Monomer

VCP

Voluntary Cleanup Program

VE

Visual Emissions

VEO

Visible Emission Observation

VHS

Vertical and Horizontal Spread Model

VHT

Vehicle-Hours of Travel

VISTTA

Visibility Impairment from Sulfur Transformation and Transport in the Atmosphere

VKT

Vehicle Kilometers Traveled

VMT

Vehicle Miles Traveled

VOC

Volatile Organic Compounds

VOS

Vehicle Operating Survey

VOST

Volatile Organic Sampling Train

VP

Vapor Pressure

VSD

Virtually Safe Dose

VSI

Visual Site Inspection

VSS

Volatile Suspended Solids

W

WA

Work Assignment

WADTF

Western Atmospheric Deposition Task Force

WAP

Waste Analysis Plan

WAVE

Water Alliances for Environmental Efficiency

WB

Wet Bulb

WCED

World Commission on Environment and Development

WDROP

Distribution Register of Organic Pollutants in Water

WENDB

Water Enforcement National Data Base

WERL

Water Engineering Research Laboratory

WET

Whole Effluent Toxicity test

WHO

World Health Organization

WHP

Wellhead Protection Program

WHPA

Wellhead Protection Area

WHWT

Water and Hazardous Waste Team

WICEM

World Industry Conference on Environmental Management

WL

Warning Letter; Working Level (radon measurement)

WLA/TMDL

Wasteload Allocation/Total Maximum Daily Load

WLM

Working Level Months

WMO

World Meteorological Organization

WP

Wettable Powder

WPCF

Water Pollution Control Federation

WQS

Water Quality Standard

WRC

Water Resources Council

WRDA

Water Resources Development Act

WRI

World Resources Institute

WS

Work Status

WSF

Water Soluble Fraction

WSRA

Wild and Scenic Rivers Act

WSTB

Water Sciences and Technology Board

WSTP

Wastewater Sewage Treatment Plant

WWEMA

Waste and Wastewater Equipment Manufacturers Association

WWF

World Wildlife Fund

WWTP

Wastewater Treatment Plant

WWTU

Wastewater Treatment Unit

Z

ZEV

Zero Emissions Vehicle

ZHE

Zero Headspace Extractor

ZOI

Zone Of Incorporation

ZRL

Zero Risk Level












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