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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| A | Asbestos (CERFA specific) | |
| A&C | Abatement and Control | |
| A&I | Alternative and Innovative (Wastewater Treatment System) | |
| A&R | Air and Radiation | |
| A/WPR | Air/Water Pollution Report | |
| AA | Accountable Area | |
| AA | Administrative Assistant | |
| AA | Adverse Action | |
| AA | Advices of Allowance | |
| AA | Assistant Administrator | |
| AA | Associate Administrator | |
| AA | Atomic Absorption | |
| AAA | Administrative Adjudication Act | Establishment of Division of Hearings: |
| AAAS | American Association for the Advancement of Science | |
| AAE | American Academy of Environmental Engineers | |
| AAEE | American Academy of Environmental Engineers | |
| AAFES | Army and Air Force Exchange Service | |
| AAP | Asbestos Action Program | |
| AAPCO | American Association of Pesticide Control Officials | |
| AARC | Alliance for Acid Rain Control | Acid Rain (See: acid deposition) |
| AAS | Atomic Absorption Spectrophotometer | |
| ABEL | EPA's computer model for analyzing a violator's ability to pay a civil penalty | |
| ABES | Alliance for Balanced Environmental Solutions | |
| AC | Assistant Commissioner (IDEM) | |
| AC | Advisory Circular | |
| AC | Actual Commitment | |
| AC | Alternating Current | |
| 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 | |
| ACIC | American Committee for International Conservation | |
| ACL | Alternate Concentration Limit | |
| ACL | Analytical Chemistry Laboratory | |
| ACM | Assessment of Corrective Measures | |
| ACM | Asbestos-Containing Materia | |
| ACP | Agriculture Control Program (Water Quality Management) | |
| ACP | Air Carcinogen Policy | |
| ACQR | Air Quality Control Region | |
| ACQUIRE | Aquatic Information Retrieval | |
| 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 | |
| ADMINCEN | U.S. Army Administrative Center | |
| ADP | AHERA Designated Person | |
| ADP | Automated Data Processing | |
| ADQ | Audits of Data Quality | |
| ADR | Alternate Dispute Resolution | |
| ADSS | Air Data Screening System | |
| ADT | Average Daily Traffic | |
| AE | Acute Effect | |
| AE | Assessment Endpoint | |
| AEA | Atomic Energy Act | U.S. Nuclear Regulatory Commission |
| AEC | U.S. Army Environmental Center | |
| AEC | Associate Enforcement Counsels | |
| AEE | Alliance for Environmental Education | |
| AEERL | Air and Energy Engineering Research Laboratory | |
| AEL | Active Exceptions List | |
| AEM | Acoustic Emission Monitoring | |
| AERE | Association of Environmental and Resource Economists | |
| AES | Auger Electron Spectrometry | |
| AFA | American Forestry Association | |
| AFS | AIRS Facility Subsystem | |
| AFUG | AIRS Facility Users Group | |
| AG | Attorney General | |
| AGC | Associate Generals Counsels | |
| AGNET | Agricultural and Forestry Network | |
| AGO | Attorney General's Office | |
| AH | Allowance Holders | |
| AHERA | Asbestos Hazard Emergency Response Act | |
| AHU | Air Handling Unit | |
| AI | Artificial Intelligence | |
| AI | Active Ingredient | |
| AIC | Active to Inert Conversion | |
| AICE | American Institute of Chemical Engineers | |
| AICUZ | Air Installation Compatible Use Zones | |
| AID | Agency for International Development | |
| AIG | Assistance Inspector General | |
| AIHA | American Industrial Hygiene Association | |
| AIHA | American Industrial Hygiene Association | American Academy of Industrial Hygiene |
| AIHC | American Industrial Health Council | American Industrial Hygiene Association |
| AIP | Auto Ignition Point | |
| AIRMON | Atmospheric Integrated Research Monitoring Network | |
| AIRS | Aerometric Information Retrieval System | Air Data |
| AL | Acceptable Level | |
| AL | Action 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 | |
| ALF | Abandoned Landfill Facility | |
| ALJ | Administrative Law Judge | |
| ALMS | Atomic Line Molecular Spectroscopy | |
| ALR | Action Leakage Rate | |
| AMBIENS | Atmospheric Mass Balance of Industrially Emitted and Natural Sulfur | |
| AMD | Acid Mine Drainage | |
| AML | Abandon Mine Lands | |
| 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 | |
| ANSI | American National Standards Institute | |
| ANSS | American Nature Study Society | |
| AO | Area Office | |
| AO | Administrative Officer | |
| AO | Administrators Office | |
| AO | Adminstrative Order (on consent) | |
| AO | Agreed Order | |
| AOAC | Association of Official Analytical Chemists | |
| AOC | Approximate Original Contour | |
| AOC | Area of Concern | |
| AOC | Abnormal Operating Conditions | |
| AOD | Argon-Oxygen Decarbonization | |
| AOML | Atlantic Oceanographic and Meteorological Laboratory | |
| AP | Accounting Point | |
| APA | Administrative Procedures Act | |
| APC | Air Pollution Control | |
| APCA | Air Pollution Control Association | |
| APCB | Air Pollution Control Board | Title 326 Air Pollution Control Board |
| APCD | Air Pollution Control District | |
| APDS | Automated Procurement Documentation System | |
| APHA | American Public Health Association | |
| API | American Petroleum Institute | |
| 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 Regtion (CAA) | |
| 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 | |
| AQMP | Air-Quality Management Plan | |
| AQRD | Air-Quality Control Region | |
| AQSM | Air-Quality Simulation Model | |
| AQTAD | Air-Quality Technical Assistance Demonstration | |
| AR | Administrative Record | |
| ARA | Assistant Regional Administrator | |
| ARA | 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 | |
| ARCA | Area Fuel Consumption Allocation | |
| ARCC | American Rivers Conservation Council | |
| ARCEE | Air Force Center for Environmental Excellence | |
| ARCOM | Army Reserve Command | |
| ARCS | Alternative Remedial Contract Strategy | |
| AREE | Area Requiring Environmental Evaluation | |
| 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 | Air Stripper | |
| AS | Area Source | |
| AS | Air Sparge | |
| ASAP | As Soon As Possible | |
| ASC | Area Source Category | |
| ASCE | American Society of Civil Engineers | |
| ASDWA | Association of State Drinking Water Administrators | |
| ASHAA | Asbestos in Schools Hazard Abatement Act | |
| ASHRAE | American Society of Heating, Refrigerating, and Air-Conditioning Engineers | ASHRAE History |
| ASIWCPA | Association of State and Interstate Water Pollution Control Administrators | |
| ASMDHS | Airshed Model Data Handling System | |
| ASQC | American Society for Quality Control | |
| ASRL | Atmospheric Sciences Research Laboratory | |
| AST | Advanced Secondary (Wastewater) Treatment | |
| AST | Aboveground Storage Tank | |
| 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 | |
| AT | Alpha Track Detection | |
| ATERIS | Air Toxics Exposure and Risk Information System | Air Toxics |
| ATS | Action Tracking System | |
| ATS | Allowance Tracking System | |
| ATSDR | Agency for Toxic Substances and Disease Registry | |
| ATTF | Air Toxics Task Force | |
| ATV | All Terrain Vehicle | |
| AUSM | Advanced Utility Simulation Model | |
| AVCM | Assessment of Various Corrective Measures (Ground Water Solid Waste) | |
| AWMA | Air and Waste Management Association | |
| AWRA | American Water Resources Association | |
| AWT | Advanced Wastewater Treatment | |
| AWWA | American Water Works Association | |
| AWWARF | American Water Works Association Research Foundation |
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