Abbreviations and Acronyms

In an exuberant effort at being concise and efficient, various organizations (with the government at the top of the list) have created individualized pseudo languages.

This has created and established recognizable, abbreviated language that can be both intimidating and frustrating for those of us required to use and understand it and those not.

The confusing aspect is that there is no central Organization for the Establishment of Abbreviations and Acronyms or, as it might be transposed in this context, the non-existent OEAA (a lame attempt at getting a point across).

Abbreviations and acronyms do not necessarily cross organizational or company lines. The meaning of an abbreviation for one organization does not necessarily mean it will apply within other companies or organizations.

In the FDA (Food and Drug Administration) the acronym ADR stands for Adverse Drug Reaction. In the EPA (Environmental Protection Agency) that same acronym stands for Alternate Dispute Resolution.
In the EPA, RF stands for Response Factor. In ASME (American Society for Mechanical Engineers) that same abbreviation stands for Raised Face (flange).

What we will attempt to do here is provide you with a listing of the various abbreviations and acronyms, along with their parent terminology, as they apply in their originating organization, if they have one.

Quite a large number of these abbreviations and acronyms have more or less evolved into the industry. Each company, whether it's an engineering firm or a manufacturer, has a tendency to extend and modify industry-excepted abbreviations and create its own library of abbreviations, acronyms and terminology definition. More so for the manufacturer whose incentive is in the hope of maintaining continuity and understanding from project to project.

An industrial facility, throughout its existence, will undergo continuous change through capitol and maintenance projects. These expansions and modifications will be done by an assortment of design and construction firms leaving in their wake project files that contain an assortment of design formats. That is, unless the owner is in a position to provide their own design criteria.

It is with the hope of creating some continuity, with regard to the use of abbreviations and acronyms throughout the industry, that we are providing these lists. Some will be
specific to a particular organization and some will be general to the industry.

Abbreviations & Acronyms
As they pertain to the EPA


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 Add 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
ACP: 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-D: 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
AOID: 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
APIDS: 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 Modeling
AQCCT: Air-Quality Criteria and Control Techniques
AQCP: Air Quality Control Program
AQCR: Air-Quality Control Region
AQID: 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
AIWPR: 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.


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
BATIEA: 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


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; Complianc
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 Treat 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-Accoustics
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 Labeling 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: Compressed 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 Technologies Substitutes 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


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: Diethylsti Ibesterol
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


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 Counseling 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
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
EISIAS: Emissions Inventory System/Area Source
EISIPS: 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
EPAGT: 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
FEVI: 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
FIM: Federal Land Manager
FLP: Flash Point
FLPMA: Federal Land Policy and Management Act
FMAP: Financial Management Assistance Project
FIM: 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
FUS: FIFRAITSCA 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


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 Fitter
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
GIMI: Grams per mile
GOCO: Government-Owned/Contractor-Operated
GOGO: Government-Owned/Government-Operated
GOP: General Operating Procedures
GOPO: Government-Owned/Privately-Operated
GPAD: Gallon-per-acre per-day
GPG: Gram-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 Disinfedtion Rule
GWM: Groundwater Monitoring
GWP: Global Warming Potential
GWPC: Ground Water Protetion 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: Horsepower
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
IMC: 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)
IM: Inspection/Maintenance
IMM: Intersection Mid block 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: Inovative 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


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


(No Abbreviations or Acronyms listed)


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 Aassessment
LCD: Local Climatojogical Data
LCL: Lower Control Limit
LCM: Life Cycle Management
LCRS: Leachate Collection and Removal System
LD: Land Disposal. Light Duty
LDLO: 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
LDAR: 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


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


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
NOM: 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
N20: 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: Naural 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


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


P2: Pollution Prevention
PAG: Pesticide Assignment Guidelines
PAH: Polynuclear Aromatic Hydrocarbons
PAI: 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: PresidenVs 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 Forc
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 l0m and less)
PMI5: 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


(No Abbreviations or Acronyms listed)


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
RID/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 Technlogies
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
RFID: 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
RIFS: Remedial Informationi 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, N02, and 03
ROADWAY: A Model to Predict Pollutant Concentrations Near a Roadway
ROC: Record Of Communication
ROIDS: 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&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-ln-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
SBS: Sick Building Syndrome
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
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
SSID: 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 Assesment 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


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
TMRG: 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: 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


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:       Microgrms 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


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 th 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


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