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We all know that government officials and technoids love to use acronyms for everything! IAC (in any case), here is a list of the most common EHS acronyms. If we missed one or you have a list to suggest, contact us by the feedback form !
IF YOU DON'T FIND IT IN THE LIST BELOW, TRY THIS MASSIVE EPA GLOSSARY OF TERMS AND PHRASES . JUST CLICK ON THE LETTER BELOW THAT THE TERM BEGINS WITH:
And if you're looking for our massive environmental & safety guidance web pages, click here !
| Acronym | Description |
| AA | Attainment Area |
| ACL | Alternative Concentration Limit |
| ACM | Asbestos-Containing Material |
| ANSI | American National Standards Institute |
| AOC | Area of Contamination |
| API | American Petroleum Institute |
| AQCR | Air Quality Control Region |
| ARAR | Applicable Relevant and Appropriate Requirements (Cleanup Standards) |
| ASHRAE | American Society of Heating, Refrigeration and Air Conditioning Engineers |
| ASTM | American Society for Testing and Materials |
| ATSDR | Agency for Toxic Substances and Disease Registry |
| BACM | Best Available Control Measure |
| BACT | Best Available Control Technology |
| BAT | Best Available Technology |
| BATEA | Best Available Technology Economically Achievable |
| BCT | Best Conventional Technology |
| BDAT | Best Demonstrational Achievable Technology (also "Available") |
| BDT | Best Demonstrational Technology |
| BEJ | Best Engineering Judgment |
| BIF | Boiler and Industrial Furnace |
| BMP | Best Management Practice |
| BOD | Biological Oxygen Demand |
| BPJ | Best Professional Judgment |
| BPT | Best Practical Control Technology |
| BRS | Biennial Reporting System |
| BTU | British Thermal Units |
| C&D | Construction and Demolition |
| CAA | Clean Air Act |
| CAAA | Clean Air Act Amendments
|
| CBI | Confidential Business Information |
| CAIR | Comprehensive Assessment Information Rule |
| CAMU | Corrective Action Management Unit |
| CAS | Chemical Abstract Service |
| CCP | Commercial Chemical Product |
| CDC | Centers for Disease Control |
| CDD | Chlorodibenzodioxin |
| CDF | Chlorodibenzofuran |
| CEM | Continuous Emission Monitoring |
| CEQ | Council on Environmental Quality |
| CERCLA | Comprehensive Environmental Response Compensation Liability Act of 1980 (amended in 1984 and later) |
| CESQG | Conditionally Exempt Small Quantity Generator of hazardous wastes |
| CFC | Chlorofluorocarbon - an ozone-depleting refrigerant |
| CFR | Code of Federal Regulations |
| CHEMTREC | Chemical Transportation Emergency Center |
| CHIPS | Chemical Hazards Information Profiles (EPA |
| COD | Chemical Oxygen Demand |
| CPSC | Consumer Product Safety Commission (16 CFR) |
| CTG | Control Techniques Guidelines |
| CWA | Clean Water Act |
| DCO | Delayed Compliance Order |
| DDT | Dichlorodiphenyltrichloroethane - a toxic pesticide |
| DMR | Discharge Monitoring Reports |
| DO | Dissolved Oxygen |
| DOD | Department of Defense |
| DOE | Department of Energy |
| DOJ | Department of Justice |
| DOT | Department of Transportation |
| DRE | Destruction and Removal Efficiency |
| EIS | Environmental Impact Statement |
| EMS | Environmental Management System (also see ISO14000) |
| EP | Extraction Procedure |
| EPA | Environmental Protection Agency |
| EPR | Extended Product Responsibility |
| ESA | Environmental Site Assessment |
| EPCRA | Emergency Planning and Community Right-to-Know Act |
| ESP | Electrostatic Precipitor |
| FDA | Food and Drug Administration(21 CFR) |
| EUP | Exceptional Use Permits |
| FFCA | Federal Facility Compliance Act |
| FIFRA | Federal Insecticide, Fungicide and Rodenticide Act |
| First Third | August 17, 1988, Federal Register (53 FR 31138) - the first of the hazardous waste land disposal restrictions |
| FR | Federal Register |
| GLP | Good Laboratory Practices |
| GNP | Good Manufacturing Procedures |
| GPO | Government Printing Office |
| GRAS | Generally Recognized as Safe |
| GLPS | Good Laboratory Practice Standards |
| HAP | Hazardous Air Pollutant |
| HazWoper | 29 CFR 1910.120 - the OSHA / EPA requirement to have all employees trained if they will be handling, managing or shipping hazardous wastes. |
| HRS | Hazard Ranking System |
| HCFC | Hydrochlorofluorocarbon |
| HHW | Household Hazardous Waste |
| HM | Hazardous Material |
| HW | Hazardous Waste |
| HSWA | Hazardous and Solid Waste Amendments of 1984 |
| HWM | Hazardous Waste Management |
| ID | (as in ID number) - Hazardous Waste Identification Number assigned to RCRA generators, transporters, and TSDFs |
| Implementing Agency | refers to the State or Regional office implementing RCRA |
| INUR | Inventory Update Rule |
| ISO | International Organization for Standardization |
| ISO14000 | The ISO standard for environmental management systems |
| ITC | Interagency Testing Committee |
| LAER | Lowest Achievable Emission Rate |
| LCA | Life Cycle Analysis/ Assessment |
| LDR | Land Disposal Restrictions (40 CFR Part 268) |
| LEPC | Local Emergency Planning Committee |
| Limit | |
| LOEL | Lowest Observed Effect Level |
| LQG | Large Quantity Generator of hazardous wastes - this term has a specific definition under RCRA! |
| LUST | Leaking Underground Storage Tanks |
| MACT | Maximum Achievable Control Technology |
| MARPOL | International Convention on the Prevention of Pollution from Ships |
| MCL | Maximum Concentration Limit or Level |
| LQHUW | Large Quantity Handlers of Universal Waste (haz wastes) |
| LSF | Liquid Scintillation Fluid (rad waste) |
| MRQ | Monthly Hotline Report Q&A, The Hotline prepares a monthly report that contains questions and answers on common or difficult RCRA topics. EPA publishes this report. The questions and answers can be usually used as EPA guidance. Beware: the hotline is run by an EPA contractor and their answers are often erratic and not legally binding. |
| MSDS | Material Safety Data Sheet (under OSHA) |
| MSW | Municipal Solid Waste (trash, nonhazwaste, etc.) |
| NAA | Non-Attainment Area |
| NAAQS | National Ambient Air Quality Standards |
| NCP | National Contingency Plan |
| NEPA | National Environmental Policy Act |
| NESHAP | National Emissions Standard for Hazardous Air Pollutants |
| NIOSH | National Institute of Occupational Safety and Health |
| NIPDWR | National Interim Primary Drinking Water Regulation |
| NPDES | National Pollutantion Discharge Elimination System |
| NPL | National Priorities List - the list of Superfund sites |
| NRC | National Response Center |
| NFPA | National Fire Protection Act |
| NIH | National Institute for Health |
| NORM | Naturally Occurring Radioactive Material |
| NRC | Several possibilities: Nuclear Regulatory Commission, National Response Center, or National Research Council |
| NSDWR | National Secondary Drinking Water Regulation |
| NSPS | New Source Performance Standards |
| NSR | New Source Review |
| NTIS | National Technical Information Service (usually charges you for the same information that we provide free...) |
| ODS | Ozone Depleting Substances (air emissions) |
| OPM | Operation and Maintenance |
| ORD | Office of Research and Development |
| OSHA | Occupational Safety and Health Administration (29 CFR) |
| OSW | Office of Solid Waste |
| OSWER | Office of Solid Waste and Emergency Response |
| P2 | Pollution Prevention |
| PAIR | Preliminary Assessment Information Rule |
| PBT | Persistent, Bioaccumulative, Toxic |
| PCB | Polychlorinated biphenyl - A toxic cooling oil used in the past in transformers and capacitors |
| PCP | Pentachlorophenol |
| PEL | Permissible Exposure Limit |
| PM-10 | Particulate Matter< 10 Micrometers |
| PNA | Polynuclear Aromatic Compounds |
| PNIN | Premanufacture Notification |
| POTW | Publicly Owned Treatment Works |
| PPB | Parts Per Billion |
| PPM | Parts Per Million |
| PRP | Potentially Responsible Parties |
| PSD | Prevention of Significant Deterioration |
| PPE | Personal Protective Equipment (such as gloves, repirators, etc.) |
| QA/QC | Quality Assurance/Quality Control |
| R&D | Research and Development |
| RACM | Reasonably Available Control Measure |
| RACT | Reasonably Available Control Technique |
| RCRA | Resource Conservation and Recovery Act of 1976 - resulted in hazardous waste regulations - 40 CFR Parts 260 to 280 |
| RGD | Radiation-Generating Devices |
| RI/FS | Remedial Investigation/ Feasibility Study |
| RPCC | Release Prevention, Control and Countermeasure |
| RQ | Reportable Quantity |
| RMP | Risk Management Plan |
| RSO | Radiation Safety Officer |
| RUST | RCRA Underground Storage Tanks |
| SARA | Superfund Amendment Reauthorization Act |
| SBAP | Small Business Assistance Program |
| SBO | Small Business Ombudsman |
| SDWA | Safe Drinking Water Act of 1974 |
| Second Third | June 23, 1989, Federal Register (54 FR 26594) - hazardous waste land disposal restrictions |
| SERC | State Emergency Response Commission |
| SIC | Standard Industrial Classification |
| SIP | State Implementation Plan |
| SMCL | Secondary Maximum Contamination Level |
| SNM | Special Nuclear Material |
| SOC | Schedule of Compliance |
| SPCC | Spill Prevention Control and Countermeasures |
| SPDES | State Pollutant Discharge Elimination |
| SQG | Small Quantity Generator of hazardous wastes (has a specific definition!) |
| SQHUW | Small Quantity Handlers of Universal Waste (haz waste) |
| SW-846 | Test Methods for Evaluating Solid Waste, Physical/Chemical Methods |
| SWMU | Solid Waste Management Unit |
| SSLA | Small Sealed Lead Acid (battery) |
| TAP | Toxic Air Pollutant
|
| TCDD | Tetrachlorodibenzodioxin |
| TCE | Tetrachloroethylene, perchloroethylene |
| TCLP | Toxic Characteristic Leaching Procedure |
| Third Third | June 1, 1990, Federal Register (55 FR 22520) - refers to hazardous wastes "landban" land disposal restrictions |
| TOC | Total Organic Carbon |
| TPQ | Threshold Planning Quantity (CERCLA community right-to-know) |
| TQ | Threshold Quantity (spill reporting) |
| TRI | Toxic Release Inventory (CERCLA community right-to-know) |
| TSCA | Toxic Substances Control Act of 1976 - regulates asbestos, PCBs, new chemicals being deveoped for sale and other chemicals |
| TSDF | Treatment, Storage, or Disposal Facility (permitted hazardous waste facility) |
| TSS | Total Suspended Solids |
| TWA | Time Weighted Average |
| UHC | Underlying Hazardous Constituent |
| UIC | Underground Injection Control |
| USCG | United States Coast Guard |
| USDA | United States Department of Agriculture |
| USDW | Underground Source of Drinking Water |
| USPS | United States Postal Service |
| UST | Underground Storage |
| UTS | Universal Treatment Standards: These are the constituent-specific treatment standards found in 268.48. |
| VOC | Volatile Organic Compounds |
| WAP | Waste Analysis Plan - A plan that outlines the procedures necessary to ensure proper treatment, storage, or disposal of hazardous waste. |
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); 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-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.
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
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 : Clean Air Interstate Rule: 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
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
EA : Endangerment Assessment; Enforcement Agreement; Environmental Action; Environmental Assessment;. Environmental Audit
EAF : Electric Arc Furnaces
EAG : Exposure Assessment Group
EAO : Emergency Administrative Order
EAP : Environmental Action Plan
EAR : Environmental Auditing Roundtable
EASI : Environmental Alliance for Senior Involvement
EB : Emissions Balancing
EC : Emulsifiable Concentrate; Environment Canada; Effective Concentration
ECA : Economic Community for Africa
ECAP : Employee Counselling and Assistance Program
ECD : Electron Capture Detector
ECHH : Electro-Catalytic Hyper-Heaters
ECHO : Enforcement and Compliance History Online
ECL : Environmental Chemical Laboratory
ECOS : Environmental Council of the States
ECR : Enforcement Case Review
ECRA : Economic Cleanup Responsibility Act
ED : Effective Dose
EDA : Emergency Declaration Area
EDB : Ethylene Dibromide
EDC : Ethylene Dichloride
EDD : Enforcement Decision Document
EDF : Environmental Defense Fund
EDRS : Enforcement Document Retrieval System
EDS : Electronic Data System; Energy Data System
EDTA : Ethylene Diamine Triacetic Acid
EDX : Electronic Data Exchange
EDZ : Emission Density Zoning
EEA : Energy and Environmental Analysis
EECs : Estimated Environmental Concentrations
EER : Excess Emission Report
EERL : Eastern Environmental Radiation Laboratory
EERU : Environmental Emergency Response Unit
EESI : Environment and Energy Study Institute
EESL : Environmental Ecological and Support Laboratory
EETFC : Environmental Effects, Transport, and Fate Committee
EF : Emission Factor
EFO : Equivalent Field Office
EFTC : European Fluorocarbon Technical Committee
EGR : Exhaust Gas Recirculation
EH : Redox Potential
EHC : Environmental Health Committee
EHS : Extremely Hazardous Substance
EI : Emissions Inventory
EIA : Environmental Impact Assessment. Economic Impact Assessment
EIL : Environmental Impairment Liability
EIR : Endangerment Information Report; Environmental Impact Report
EIS : Environmental Impact Statement; Environmental Inventory System
EIS/AS : Emissions Inventory System/Area Source
EIS/PS : Emissions Inventory System/Point Source
EJ : Environmental Justice
EKMA : Empirical Kinetic Modeling Approach
EL : Exposure Level
ELI : Environmental Law Institute
ELR : Environmental Law Reporter
EM : Electromagnetic Conductivity
EMAP : Environmental Mapping and Assessment Program
EMAS : Enforcement Management and Accountability System
EMR : Environmental Management Report
EMS : Enforcement Management System
EMSL : Environmental Monitoring Support Systems Laboratory
EMTS : Environmental Monitoring Testing Site; Exposure Monitoring Test Site
EnPA : Environmental Performance Agreement
EO : Ethylene Oxide
EOC : Emergency Operating Center
EOF : Emergency Operations Facility (RTP)
EOP : End Of Pipe
EOT : Emergency Operations Team
EP : Earth Protectors; Environmental Profile; End-use Product; Experimental Product; Extraction Procedure
EPAA : Environmental Programs Assistance Act
EPAAR : EPA Acquisition Regulations
EPCA : Energy Policy and Conservation Act
EPACT : Environmental Policy Act
EPACASR : EPA Chemical Activities Status Report
EPCRA : Emergency Planning and Community Right to Know Act
EPD : Emergency Planning District
EPI : Environmental Policy Institute
EPIC : Environmental Photographic Interpretation Center
EPNL : Effective Perceived Noise Level
EPRI : Electric Power Research Institute
EPTC : Extraction Procedure Toxicity Characteristic
EQIP : Environmental Quality Incentives Program
ER : Ecosystem Restoration; Electrical Resistivity
ERA : Economic Regulatory Agency
ERAMS : Environmental Radiation Ambient Monitoring System
ERC : Emergency Response Commission. Emissions Reduction Credit, Environmental Research Center
ERCS : Emergency Response Cleanup Services
ERDA : Energy Research and Development Administration
ERD&DAA : Environmental Research, Development and Demonstration Authorization Act
ERL : Environmental Research Laboratory
ERNS : Emergency Response Notification System
ERP : Enforcement Response Policy
ERT : Emergency Response Team
ERTAQ : ERT Air Quality Model
ES : Enforcement Strategy
ESA : Endangered Species Act. Environmentally Sensitive Area
ESC : Endangered Species Committee
ESCA : Electron Spectroscopy for Chemical Analysis
ESCAP : Economic and Social Commission for Asia and the Pacific
ESECA : Energy Supply and Environmental Coordination Act
ESH : Environmental Safety and Health
ESP : Electrostatic Precipitators
ET : Emissions Trading
ETI : Environmental Technology Initiative
ETP : Emissions Trading Policy
ETS : Emissions Tracking System; Environmental Tobacco Smoke
ETV : Environmental Technology Verification Program
EUP : End-Use Product; Experimental Use Permit
EWCC : Environmental Workforce Coordinating Committee
EXAMS : Exposure Analysis Modeling System
ExEx : Expected Exceedance
FACA : Federal Advisory Committee Act
FAN : Fixed Account Number
FATES : FIFRA and TSCA Enforcement System
FBC : Fluidized Bed Combustion
FCC : Fluid Catalytic Converter
FCCC : Framework Convention on Climate Change
FCCU : Fluid Catalytic Cracking Unit
FCO : Federal Coordinating Officer (in disaster areas); Forms Control Officer
FDF : Fundamentally Different Factors
FDL : Final Determination Letter
FDO : Fee Determination Official
FE : Fugitive Emissions
FEDS : Federal Energy Data System
FEFx : Forced Expiratory Flow
FEIS : Fugitive Emissions Information System
FEL : Frank Effect Level
FEPCA : Federal Environmental Pesticide Control Act; enacted as amendments to FIFRA.
FERC : Federal Energy Regulatory Commission
FES : Factor Evaluation System
FEV : Forced Expiratory Volume
FEV1 : Forced Expiratory Volume--one second; Front End Volatility Index
FF : Federal Facilities
FFAR : Fuel and Fuel Additive Registration
FFDCA : Federal Food, Drug, and Cosmetic Act
FFEO : Federal Facilities Enforcement Office
FFF : Firm Financial Facility
FFFSG : Fossil-Fuel-Fired Steam Generator
FFIS : Federal Facilities Information System
FFP : Firm Fixed Price
FGD : Flue-Gas Desulfurization
FID : Flame Ionization Detector
FIFRA : Federal Insecticide, Fungicide, and Rodenticide Act
FIM : Friable Insulation Material
FINDS : Facility Index System
FIP : Final Implementation Plan
FIPS : Federal Information Procedures System
FIT : Field Investigation Team
FLETC : Federal Law Enforcement Training Center
FLM : Federal Land Manager
FLP : Flash Point
FLPMA : Federal Land Policy and Management Act
FMAP : Financial Management Assistance Project
F/M : Food to Microorganism Ratio
FML : Flexible Membrane Liner
FMP : Facility Management Plan
FMP : Financial Management Plan
FMS : Financial Management System
FMVCP : Federal Motor Vehicle Control Program
FOE : Friends Of the Earth
FOIA : Freedom Of Information Act
FOISD : Fiber Optic Isolated Spherical Dipole Antenna
FONSI : Finding Of No Significant Impact
FORAST : Forest Response to Anthropogenic Stress
FP : Fine Particulate
FPA : Federal Pesticide Act
FPAS : Foreign Purchase Acknowledgement Statements
FPD : Flame Photometric Detector
FPEIS : Fine Particulate Emissions Information System
FPM : Federal Personnel Manual
FPPA : Federal Pollution Prevention Act
FPR : Federal Procurement Regulation
FPRS : Federal Program Resources Statement; Formal Planning and Supporting System
FQPA : Food Quality Protection Act
FR : Federal Register. Final Rulemaking
FRA : Federal Register Act
FREDS : Flexible Regional Emissions Data System
FRES : Forest Range Environmental Study
FRM : Federal Reference Methods
FRN : Federal Register Notice. Final Rulemaking Notice
FRS : Formal Reporting System
FS : Feasibility Study
FSA : Food Security Act
FSS : Facility Status Sheet; Federal Supply Schedule
FTP : Federal Test Procedure (for motor vehicles)
FTS : File Transfer Service
FTTS : FIFRA/TSCA Tracking System
FUA : Fuel Use Act
FURS : Federal Underground Injection Control Reporting System
FVMP : Federal Visibility Monitoring Program
FWCA : Fish and Wildlife Coordination Act
FWPCA : Federal Water Pollution and Control Act (aka CWA). Federal Water Pollution and Control Administration
FY : Fiscal Year
GAAP : Generally Accepted Accounting Principles
GAC : Granular Activated Carbon
GACT : Granular Activated Carbon Treatment
GAW : Global Atmospheric Watch
GCC : Global Climate Convention
GC/MS : Gas Chromatograph/ Mass Spectograph
GCVTC : Grand Canyon Visibility Transport Commission
GCWR : Gross Combination Weight Rating
GDE : Generic Data Exemption
GEI : Geographic Enforcement Initiative
GEMI : Global Environmental Management Initiative
GEMS : Global Environmental Monitoring System; Graphical Exposure Modeling System
GEP : Good Engineering Practice
GFF : Glass Fiber Filter
GFO : Grant Funding Order
GFP : Government-Furnished Property
GICS : Grant Information and Control System
GIS : Geographic Information Systems; Global Indexing System
GLC : Gas Liquid Chromatography
GLERL : Great Lakes Environmental Research Laboratory
GLNPO : Great Lakes National Program Office
GLP : Good Laboratory Practices
GLWQA : Great Lakes Water Quality Agreement
GMCC : Global Monitoring for Climatic Change
G/MI : Grams per mile
GOCO : Government-Owned/ Contractor-Operated
GOGO : Government-Owned/ Government-Operated
GOP : General Operating Procedures
GOPO : Government-Owned/ Privately-Operated
GPAD : Gallons-per-acre per-day
GPG : Grams-per-Gallon
GPR : Ground-Penetrating Radar
GPRA : Government Performance and Results Act
GPS : Groundwater Protection Strategy
GR : Grab Radon Sampling
GRAS : Generally Recognized as Safe
GRCDA : Government Refuse Collection and Disposal Association
GRGL : Groundwater Residue Guidance Level
GT : Gas Turbine
GTN : Global Trend Network
GTR : Government Transportation Request
GVP : Gasoline Vapor Pressure
GVW : Gross Vehicle Weight
GVWR : Gross Vehicle Weight Rating
GW : Grab Working-Level Sampling. Groundwater
GWDR : Ground Water Disinfection Rule
GWM : Groundwater Monitoring
GWP : Global Warming Potential
GWPC : Ground Water Protection Council
GWPS : Groundwater Protection Standard; Groundwater Protection Strategy
HA : Health Advisory
HAD : Health Assessment Document
HAP : Hazardous Air Pollutant
HAPEMS : Hazardous Air Pollutant Enforcement Management System
HAPPS : Hazardous Air Pollutant Prioritization System
HATREMS : Hazardous and Trace Emissions System
HAZMAT : Hazardous Materials
HAZOP : Hazard and Operability Study
HBFC : Hydrobromofluorocarbon
HC : Hazardous Constituents; Hydrocarbon
HCCPD : Hexachlorocyclo-pentadiene
HCFC : Hydrochlorofluorocarbon
HCP : Hypothermal Coal Process
HDD : Heavy-Duty Diesel
HDDT : Heavy-duty Diesel Truck
HDDV : Heavy-Duty Diesel Vehicle
HDE : Heavy-Duty Engine
HDG : Heavy-Duty Gasoline-Powered Vehicle
HDGT : Heavy-Duty Gasoline Truck
HDGV : Heavy-Duty Gasoline Vehicle
HDPE : High Density Polyethylene
HDT : Highest Dose Tested in a study. Heavy-Duty Truck
HDV : Heavy-Duty Vehicle
HEAL : Human Exposure Assessment Location
HECC : House Energy and Commerce Committee
HEI : Health Effects Institute
HEM : Human Exposure Modeling
HEPA : High-Efficiency Particulate Air
HEPA : Highly Efficient Particulate Air Filter
HERS : Hyperion Energy Recovery System
HFC : Hydrofluorocarbon
HHDDV : Heavy Heavy-Duty Diesel Vehicle
HHE : Human Health and the Environment
HHV : Higher Heating Value
HI : Hazard Index
HI-VOL : High-Volume Sampler
HIWAY : A Line Source Model for Gaseous Pollutants
HLRW : High Level Radioactive Waste
HMIS : Hazardous Materials Information System
HMS : Highway Mobile Source
HMTA : Hazardous Materials Transportation Act
HMTR : Hazardous Materials Transportation Regulations
HOC : Halogenated Organic Carbons
HON : Hazardous Organic NESHAP
HOV : High-Occupancy Vehicle
HP : Horse Power
HPLC : High-Performance Liquid Chromatography
HPMS : Highway Performance Monitoring System
HPV : High Priority Violator
HQCDO : Headquarters Case Development Officer
HRS : Hazardous Ranking System
HRUP : High-Risk Urban Problem
HSDB : Hazardous Substance Data Base
HSL : Hazardous Substance List
HSWA : Hazardous and Solid Waste Amendments
HT : Hypothermally Treated
HTP : High Temperature and Pressure
HVAC : Heating, Ventilation, and Air-Conditioning system
HVIO : High Volume Industrial Organics
HW : Hazardous Waste
HWDMS : Hazardous Waste Data Management System
HWGTF : Hazardous Waste Groundwater Task Force; Hazardous Waste Groundwater Test Facility
HWIR : Hazardous Waste Identification Rule
HWLT : Hazardous Waste Land Treatment
HWM : Hazardous Waste Management
HWRTF : Hazardous Waste Restrictions Task Force
HWTC : Hazardous Waste Treatment Council
I/A : Innovative/Alternative
IA : Interagency Agreement
IAAC : Interagency Assessment Advisory Committee
IADN : Integrated Atmospheric Deposition Network
IAG : Interagency Agreement
IAP : Incentive Awards Program. Indoor Air Pollution
IAQ : Indoor Air Quality
IARC : International Agency for Research on Cancer
IATDB : Interim Air Toxics Data Base
IBSIN : Innovations in Building Sustainable Industries
IBT : Industrial Biotest Laboratory
IC : Internal Combustion
ICAIR : Interdisciplinary Planning and Information Research
ICAP : Inductively Coupled Argon Plasma
ICB : Information Collection Budget
ICBN : International Commission on the Biological Effects of Noise
ICCP : International Climate Change Partnership
ICE : Industrial Combustion Emissions Model. Internal Combustion Engine
ICP : Inductively Coupled Plasma
ICR : Information Collection Request
ICRE : Ignitability, Corrosivity, Reactivity, Extraction
ICRP : International Commission on Radiological Protection
ICRU : International Commission of Radiological Units and Measurements
ICS : Incident Command System. Institute for Chemical Studies; Intermittent Control Strategies.; Intermittent Control System
ICWM : Institute for Chemical Waste Management
IDEA : Integrated Data for Enforcement Analysis
IDLH : Immediately Dangerous to Life and Health
IEB : International Environment Bureau
IEMP : Integrated Environmental Management Project
IES : Institute for Environmental Studies
IFB : Invitation for Bid
IFCAM : Industrial Fuel Choice Analysis Model
IFCS : International Forum on Chemical Safety
IFIS : Industry File Information System
IFMS : Integrated Financial Management System
IFPP : Industrial Fugitive Process Particulate
IGCC : Integrated Gasification Combined Cycle
IGCI : Industrial Gas Cleaning Institute
IIS : Inflationary Impact Statement
IINERT : In-Place Inactivation and Natural Restoration Technologies
IJC : International Joint Commission (on Great Lakes)
I/M : Inspection/Maintenance
IMM : Intersection Midblock Model
IMPACT : Integrated Model of Plumes and Atmosphere in Complex Terrain
IMPROVE : Interagency Monitoring of Protected Visual Environment
INPUFF : Gaussian Puff Dispersion Model
INT : Intermittent
IOB : Iron Ore Beneficiation
IOU : Input/Output Unit
IPCS : International Program on Chemical Safety
IP : Inhalable Particles
IPM : Inhalable Particulate Matter. Integrated Pest Management
IPP : Implementation Planning Program. Integrated Plotting Package; Inter-media Priority Pollutant (document); Independent Power Producer
IPCC : Intergovernmental Panel on Climate Change
IPM : Integrated Pest Management
IRG : Interagency Review Group
IRLG : Interagency Regulatory Liaison Group (Composed of EPA, CPSC, FDA, and OSHA)
IRIS : Instructional Resources Information System. Integrated Risk Information System
IRM : Intermediate Remedial Measures
IRMC : Inter-Regulatory Risk Management Council
IRP : Installation Restoration Program
IRPTC : International Register of Potentially Toxic Chemicals
IRR : Institute of Resource Recovery
IRS : International Referral Systems
IS : Interim Status
ISAM : Indexed Sequential File Access Method
ISC : Industrial Source Complex
ISCL : Interim Status Compliance Letter
ISCLT : Industrial Source Complex Long Term Model
ISCST : Industrial Source Complex Short Term Model
ISD : Interim Status Document
ISE : Ion-specific electrode
ISMAP : Indirect Source Model for Air Pollution
ISO : International Organization for Standardization
ISPF : (IBM) Interactive System Productivity Facility
ISS : Interim Status Standards
ITC :Innovative Technology Council
ITC : Interagency Testing Committee
ITRC : Interstate Technology Regulatory Coordination
ITRD : Innovative Treatment Remediation Demonstration
IUP : Intended Use Plan
IUR : Inventory Update Rule
IWC : In-Stream Waste Concentration
IWS : Ionizing Wet Scrubber
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
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.
LDAR : Leak Detection and Repair
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
MAC : Mobile Air Conditioner
MACT : Maximum Achievable Control Technology
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
MRBMA : Mercury-Containing and Rechargeable Battery Management Act
MRF : Materials Recovery Facility
MRID : Master Record Identification number
MRL : Maximum-Residue Limit (Pesticide Tolerance)
MSW : Municipal Solid Waste
MTBE : Methyl tertiary butyl ether
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
NASA : National Aeronautics and Space Administration
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
NEIC : National Enforcement Investigations Center
NEPA : National Environmental Policy Act
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
NO : Nitrogen Dioxide
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
NOV : Notice of Violation
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
NPMS : National Performance Measures Strategy
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
NSR/PSD : National Source Review/Prevention of Significant Deterioration
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
OAQPS : Office of Air Quality Planning and Standards
OCD : Offshore and Coastal Dispersion
ODP : Ozone-Depleting Potential
ODS : Ozone-Depleting Substances
OECA : Office of Enforcement and Compliance Assurance
OECD : Organization for Economic Cooperation and Development
OF : Optional Form
OI : Order for Information
OLC : Office of Legal Counsel
OLTS : On Line Tracking System
O&M : Operations and Maintenance
ORE : Office of Regulatory Enforcement
ORM : Other Regulated Material
ORP : Oxidation-Reduction Potential
OTAG : Ozone Transport Assessment Group
OTC : Ozone Transport Commission
OTIS : Online Tracking Information System
OTR : Ozone Transport Region
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
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
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 Investigation/ 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
RMP : Risk Management Plan
RNA : Ribonucleic Acid
ROADCHEM : Roadway Version that Includes Chemical Reactions of BI, NO 2 , and O 3
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&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
SFIP : Sector Facility Indexing Project
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
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
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
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
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
ZEV : Zero Emissions Vehicle
ZHE : Zero Headspace Extractor
ZOI : Zone Of Incorporation
ZRL : Zero Risk Level
