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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| 304 | Sara Title III 304 Reporting | |
| 319 | Section 319 Nonpoint Source Program | |
| 401 | Section 401 of the Clean Water Act | |
| 404 | Section 404 of the Clean Water Act | |
| 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 | Administrative Assistant | |
| AA | Accountable Area | |
| AA | Associate Administrator | |
| AA | Advices of Allowance | |
| AA | Adverse Action | |
| AA | Assistant 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 | Alternating Current | |
| AC | Advisory Circular | |
| AC | Actual Commitment | |
| ACA | American Conservation Association | |
| ACBM | Asbestos-Containing Building Material | |
| ACE | Any Credible Evidence | |
| ACE | Alliance for Clean Energy | |
| ACEEE | American Council for an Energy Efficient Economy | |
| ACFM | Actual Cubic Feet Per Minute | |
| ACIC | American Committee for International Conservation | |
| ACL | Analytical Chemistry Laboratory | |
| ACL | Alternate Concentration Limit | |
| ACM | Asbestos-Containing Materia | |
| ACM | Assessment of Corrective Measures | |
| ACP | Air Carcinogen Policy | |
| ACP | Agriculture Control Program (Water Quality Management) | |
| 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 | Automated Data Processing | |
| ADP | AHERA Designated Person | |
| 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 | Associate Enforcement Counsels | |
| AEC | U.S. Army Environmental Center | |
| 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 | Active Ingredient | |
| AI | Artificial Intelligence | |
| 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 | Action Level | |
| 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 | |
| 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 | Agreed Order | |
| AO | Adminstrative Order (on consent) | |
| AO | Administrators Office | |
| AO | Administrative Officer | |
| AOAC | Association of Official Analytical Chemists | |
| AOC | Area of Concern | |
| AOC | Abnormal Operating Conditions | |
| AOC | Approximate Original Contour | |
| 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 Management Plan | |
| AQMP | Air-Quality Maintenance Plan | |
| AQRD | Air-Quality Control Region | |
| AQSM | Air-Quality Simulation Model | |
| AQTAD | Air-Quality Technical Assistance Demonstration | |
| AR | Administrative Record | |
| ARA | Associate Regional Administrator | |
| ARA | Assistant 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 Sparge | |
| AS | Air Stripper | |
| AS | Area Source | |
| 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 | Alpha Track Detection | |
| AT | Advanced Treatment | |
| ATERIS | Air Toxics Exposure and Risk Information System | Air Toxics |
| ATS | Allowance Tracking System | |
| ATS | Action 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 | |
| BAA | Board of Assistance Appeals | |
| BAA | Broad Agency Announcement | |
| BAC | Biotechnology Advisory Committee | |
| BAC | Bioremediation Action 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 | |
| BC | Branch Chief (IDEM) | |
| BCPCT | Best Conventional Pollutant Control Technology | |
| BCT | Best Control Technology | |
| BDAT | Best Demonstrated Achievable Technology | |
| BDCT | Best Demonstrated Control Technology | |
| BDT | Best Demonstrated Technology | |
| BEA | Brownfields Environmental Assessment | IDEM Guide for Citizen Participation |
| BEJ | Best Engineering Judgment | |
| BEJ | Best Expert Judgment | |
| BF | Bonafide Notice of Intent to Manufacture or Import (IMD/OTS) | |
| BF | Brownfields (IDEM) | |
| BGS | Below Ground Surface | |
| BGS | Below Ground Service | |
| BID | Background Information Document | |
| BID | Buoyancy Induced Dispersion | |
| BIOPLUME | Model to Predict the Maximum Extent of Existing Plumes | |
| BLM | U.S. Bureau of Land Management | |
| BLS | Bureau of Labor Statistics | |
| BMP | Best Management Practice(s) | |
| BMR | Baseline Monitoring Report | |
| BMT | Best Management Technique (or technology) | |
| BO | Budget Obligations | |
| BOA | Basic Ordering Agreement (Contracts) | |
| BOD | Biological Oxygen Demand | |
| BOD | Biochemical Oxygen Demand | |
| BOF | Basic Oxygen Furnace | |
| BOH | Board of Health | Indiana State Department of Health |
| BOP | Basic Oxygen Process | |
| BOPF | Basic Oxygen Process Furnace | |
| BOYSNC | Beginning of Year Significant Non-Compliers | |
| BP | Boiling Point | |
| BP | Burn Pit | |
| BPJ | Best Professional Judgment | |
| BPT | Best Practicable Treatment | |
| BPT | Best Practicable Technology | |
| BPWTT | Best Practical Wastewater Treatment Technology | |
| BRAC | Base Realignment and Closure | |
| BRI | Building-Related Illness | |
| BRS | Bibliographic Retrieval Service | |
| BSI | British Standards Institute | |
| BSO | Benzene Soluble Organics | |
| BTEX | Benzene, Toluene, Ethylbenzene, Xylene | |
| BTU | British Thermal Unit | |
| BTZ | Below the Treatment Zone | |
| BUN | Blood Urea Nitrogen | |
| BuSET | Bureau of Safety Education and Training (part of the IN Dept. of Labor) | INsafe - Indiana's Worker Safety Initiative |
| C | Celsius | |
| C/D | Construction/Demolition Site | |
| C/E | Compliance and Enforcement | |
| C/MI | Grams per mile | |
| C/PC | Closure/Post Closure | |
| CA | Citizen Act | |
| CA | Competition Advocate | |
| CA | Cooperative Agreements | |
| CA | Corrective Action | |
| CAA | Competition in Contracting Act | |
| CAA | Clean Air Act | |
| CAA | Compliance Assurance Agreement | |
| CAAA | Clean Air Act Amendments | |
| CAATS | Computer Assisted Approval and Tracking System | |
| CAER | Community Awareness and Emergency Response | |
| CAFE | Corporate Average Fuel Economy | |
| CAFO | Concentrated Animal Feeding Operation | |
| CAFO | Consent Agreement/Final Order | |
| CAG | Carcinogenic Assessment Group | |
| CAIR | Comprehensive Assessment of Information Rule | |
| CAIR | Clean Air Interstate Rule | |
| CAM | Compliance Assurance Monitoring Rule | |
| CAM | Compliance Assurance Monitoring | |
| CAMP | Continuous Air Monitoring Program | |
| CAMU | Corrective Action Management Unit | |
| CAN | Common Account Number | |
| CAO | Corrective Action Order | |
| CAP | Community Assistance Program | |
| CAP | Compliance Advisory Panel | |
| CAP | Corrective Action Plan | |
| CAP | Corrective Action Program | |
| CAP | Cost Allocation Procedure | |
| CAP | Criteria Air Pollutant | |
| CAR | Corrective Action Report | |
| CAS | Center for Automotive Safety | |
| CAS | Chemical Abstract Service | |
| CAS# | Chemical Abstract Service Number | |
| 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 | |
| CAU | Command Arithmetic Unit | |
| CB | Continuous Bubbler | |
| CBA | Cost Benefit Analysis | |
| CBD | Central Business District | |
| CBED | Community Based Environmental Project | |
| CBI | Confidential Business Information | |
| CBI | Compliance Biomonitoring Inspection | |
| CBO | Congressional Budget Office | |
| CBOD | Carbonaceous Biochemical Oxygen Demand | |
| CBP | County Business Patterns | |
| CC/RTS | Chemical Collection/ Request Tracking System | |
| CCAP | Center for Clean Air Policy | |
| CCAP | Climate Change Action Plan | |
| CCBP | Coal Combustion By Products | |
| 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 | Coal Combustion Products | |
| CCP | Composite Correction Plan | |
| CCR | Consumer Confidence Report | |
| CCS | Clear, Consistent, and Speedy | |
| CCT | Clean Coal Technology | |
| CCTP | Clean Coal Technology Program | |
| CD | Consent Decree | |
| CD | Compact Disk | |
| CD | Climatological Data | |
| CDB | Consolidated Data Base | |
| CDBA | Central Data Base Administrator | |
| CDBG | Community Development Block Grant | |
| CDC | Centers for Disease Control | |
| CDD | Chlorinated dibenzo-p-dioxin | |
| CDF | Chlorinated dibenzofuran | |
| CDF | Confined Disposal Facility | |
| CDHS | Comprehensive Data Handling System | |
| CDI | Chronic Daily Intake | |
| CDI | Case Development Inspection | |
| CDM | Climatological Dispersion Model | |
| CDM | 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 | Compliance and Enforcement | |
| CE | Conditionally Exempt Generator | |
| CE | Categorical Exclusion | |
| CEA | Cost and Economic Assessment | |
| CEA | Cooperative Enforcement Agreement | |
| CEAT | Contractor Evidence Audit Team | |
| CEB | Chemical Element Balance | |
| CEC | Commission for Environmental Cooperation | |
| CEC | Cation Exchange Capacity | |
| CECATS | CSB Existing Chemicals Assessment Tracking System | |
| CEE | Center for Environmental Education | |
| CEEM | Center for Energy and Environmental Management | |
| CEEP | Center for Energy and Environmental Policy | |
| CEI | Compliance Evaluation Inspection | |
| CEM | Compliance/Enforcement Management System | |
| CEM | Continuous Emission Monitoring | |
| CEMS | Continuous Emission Monitoring System | |
| 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 | |
| CERFA | Community Environmental Response Facilitation Act | |
| CERT | Certificate of Eligibility | |
| CESQG | Conditionally Exempt Small Quantity Generator | |
| CEST | Community Environmental Service Teams | |
| CF | Conservation Foundation | |
| CFC | Chlorofluorocarbons | |
| CFM | Chlorofluoromethanes | |
| CFM | Cubic Feet per Minute | |
| CFO | Concentrated Feeding Operation | |
| CFO | Confined Feeding Operation | |
| CFR | Code of Federal Regulations | |
| CFS | Cubic Feet per Second | |
| 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 | Confidence Interval | |
| CI | Contour Interval | |
| CI | Compression Ignition | |
| 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 | Contracts Information System | |
| CIS | Chemical Information System | |
| CITES | Central Indiana Technical and Environmental Societies | |
| CKD | Cement Kiln Dust | |
| CKRC | Cement Kiln Recycling Coalition | |
| CL | Closure Level | |
| 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 | |
| CMS | Corrective Measures Study | |
| CMTB | Clean Manufacturing Technology Board | |
| CMTI | Clean Manufacturing Technology and Safe Materials Institute | |
| CNG | Compressed Natural Gas | |
| CNTS | Covenant Not To Sue | |
| CO | Carbon Monoxide | |
| CO | Commissioner's Order | |
| CO2 | Carbon Dioxide | |
| COC | Chain of Custody | |
| COC | Chemical of Concern | |
| COC | Contaminant of Concern | |
| COC | Certificate of Completion | |
| COC | Constituent of Concern | |
| COCO | Contractor-Owned/ Contractor-Operated | |
| COD | Chemical Oxygen Demand | |
| COE | Corps of Engineers | |
| COG | Coefficient Of Haze | |
| COI | Constituent of Interest | |
| COMS | Continuous Emissions Monitoring System | |
| COP | Current Operating Procedure | |
| COPAS | Coastal Ocean Pollution Assessment | |
| CP | Construction Permit | |
| cPAH | Carcinagenic Polynuclear Aromatic Hydrocarbons | |
| CPDA | Chemical Producers and Distributor Association | |
| CPE | Comprehensive Performance Evaluation | |
| CPF | Carcinogenic Potency Factor | |
| CPM | Core Performance Measure | |
| CPO | Certified Project Officer | |
| CPT | Cone Penetrometer Technology | |
| CQA | Construction Quality Assurance | |
| CR | Continuous Radon Monitoring | |
| CRAI | Completeness request for Additional Information | |
| CRDL | Contract Required Detection Limit | |
| CRL | Central Regional Laboratory | |
| CROP | Consolidated Rules of Practice | |
| CRP | Community Relations Plan | |
| CRP | Conservation Reserve Program | |
| CRP | Child-Resistant Packaging | |
| CRQL | Contract Required Quantitation Limit | |
| 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 | |
| CSI | Compliance Sampling Inspection | |
| CSI | Conversion Systems Incorporated | |
| CSIN | Chemical Substances Information Network | |
| CSM | Conceptual Site Model | |
| CSMA | Chemical Specialties Manufacturers Association | |
| CSO | Combined Sewer Overflow | |
| CSPA | Council of State Planning Agencies | |
| CSRL | Center for the Study of Responsive Law | |
| CSS | Combined Sewer System | |
| CT | Product of Residual Disinfectant Concentration and Corresponding Disinfectant Contact Time | |
| CTAP | Compliance and Technical Assistance Program (IDEM) | |
| CTARC | Chemical Testing and Assessment Research Commission | |
| CTE | Central Tendency Exposure | |
| CTG | Control Techniques Guidelines | |
| CTSA | Cleaner Technologies Substitutes Assessment | |
| CTV | Critical Toxicity Value | |
| CV | Coefficient of Variation | |
| CV | Chemical Vocabulary | |
| CVS | Constant Volume Sampler | |
| CW | Continuous working-level monitoring | |
| CWA | Clean Water Action | |
| CWA | Clean Water Act (aka FWPCA) | |
| CWAP | Clean Water Action Project | |
| CWOP | Construction Without a Permit | |
| CWS | Community Water System | |
| CWTC | Chemical Waste Transportation Council | |
| CZARA | Coastal Zone Management Act Reauthorization Amendments | |
| CZMA | Coastal Zone Management Act | |
| D | Disqualified Parcel (CERFA specific) | |
| DAF | Dilution Attenuation Factor | |
| DAG | Deputy Attorney General | |
| DAPSS | Document and Personnel Security System (IMD) | |
| DB | Decibel | |
| DBP | Disinfection By-Product | |
| DC | District of Columbia | |
| DCI | Data Call-In | |
| DCO | Delayed Compliance Order | |
| DCO | Document Control Officer | |
| DCPA | Directorate of Personnel and Community Activities | |
| DDT | 4,4-DichloroDiphenylTrichloroethane | |
| DEM | Department of Environmental Management (Indiana) | |
| DERP | Defense Environmental Restoration Program | |
| DERs | Data Evaluation Records | |
| DES | Diethylstilbestrol | |
| DfE | Design for the Environment | |
| DHS | U.S. Department of Homeland Security | |
| DI | Diagnostic Inspection | |
| Dir. | Director (IDEM) | |
| DIS | Directorate of Installation Support | |
| DIY | Do-it-yourselfer (Those who change their own motor oil and take the oil to a used oil collection site) | |
| DMR | Discharge Monitoring Report | |
| DMS | Document Management System | |
| DNA | Deoxyribonucleic acid | |
| DNAPL | Dense Non-Aqueous Phase Liquid | |
| DNR | Indiana Department of Natural Resources | |
| DO | Dissolved Oxygen | |
| DOC | U.S Department of Commerce | |
| DOC | Demonstration of Capability | |
| DOD | U.S. Department of Defense | |
| DOE | U.S. Department of Energy | |
| DOI | U.S. Department of Interior | |
| DOJ | U.S. Department of Justice | |
| DOL | U.S. Department of Labor | |
| DOR | Indiana Department of Revenue | |
| DOT | U.S. Department of Transportation | |
| DOW | Defenders Of Wildlife | |
| DP | Drip Pad | |
| DPA | Deepwater Ports Act | |
| DPCA | Directorate of Personnel and Community Activities | |
| DPD | Method of Measuring Chlorine Residual in Water | |
| DPE | Dual Phase Extraction | |
| DPT | Direct Push Technologies | |
| DQA | Data Quality Assessment | |
| DQO(S) | Data Quality Objective(s) | |
| DRE | Destruction and Removal Efficiency | |
| DRES | Dietary Risk Evaluation System | |
| DRMO | Defense Reutilization and Marketing Office | |
| DRMS | Defense Reutilization and Marketing Service | |
| DRR | Data Review Record | |
| DS | Direct Push Soil | |
| DS | Dichotomous Sampler | |
| DSAP | Data Self Auditing Program | |
| DSCF | Dry Standard Cubic Feet | |
| DSCM | Dry Standard Cubic Meter | |
| DSS | Decision Support System | |
| DSS | Domestic Sewage Study | |
| DT | Detectors (radon) damaged or lost | |
| DT | Detention Time | |
| DTW | Depth To Water | |
| DU | Dobson Unit | |
| DU | Ducks Unlimited | |
| DU | Decision Unit | |
| DUC | Decision Unit Coordinator | |
| DW | Direct Push Water | |
| DW | Drinking Water | |
| DWB | Drinking Water Branch (IDEM) | |
| DWEL | Drinking Water Equivalent Level | |
| DWS | Drinking Water Standard | Contaminants & MCLs (EPA) |
| DWSRF | Drinking Water State Revolving Fund | |
| E | Excluded Parcel (CERFA specific) | |
| EA | Endangerment Assessment | |
| EA | Enforcement Agreement | |
| EA | Environmental Action | |
| EA | Environmental Assessment | |
| EA | Environmental Audit | |
| EAF | Electric Arc Furnaces | |
| EAG | Exposure Assessment Group | |
| EAP | Environmental Action Plan | |
| EAPCASR | EPA Chemical Activities Status Report | |
| EAPM | Early Action Project Manager | |
| EAR | Environmental Auditing Roundtable | |
| EASI | Environmental Alliance for Senior Involvement | |
| EB | Emissions Balancing | |
| EC | Effective Concentration | |
| EC | Emulsifiable Concentrate | |
| 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 | |
| ECOTOX | ECOTOXicology | |
| 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 | |
| EDI | Enterprise Data Initiative (IDEM) | |
| EDRS | Enforcement Document Retrieval System | |
| EDS | Electronic Data System | |
| EDS | 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 | |
| EGR | Exhaust Gas Recirculation | |
| EH | Redox Potential | |
| EHC | Environmental Health Committee | |
| EHS | Extremely Hazardous Substance | |
| EI | Emissions Inventory | |
| EI | Environmental Investigation(s) | |
| EIA | Environmental Impact Assessment | |
| EIA | Economic Impact Assessment | |
| EID | Energy Isolating Devices | |
| EIL | Environmental Impairment Liability | |
| EIR | Environmental Impact Report | |
| EIR | Endangerment Information Report | |
| EIS | Environmental Inventory System | |
| EIS | Environmental Impact Statement | |
| EIS/AS | Emissions Inventory System/Area Source | |
| EIS/PS | Emissions Inventory System/Point Source | |
| EKMA | Empirical Kinetic Modeling Approach | |
| EL | Exposure Level | |
| ELF | Excess Liability Fund | |
| ELI | Environmental Law Institute | |
| ELR | Environmental Law Reporter | |
| ELTF | Excess Liability Trust Fund | |
| EM | Electromagnetic | |
| EM | Electromagnetic Conductivity | |
| EMA | Environmental Management Act | |
| EMAP | Environmental Mapping and Assessment Program | |
| EMAS | Enforcement Management and Accountability System | |
| EMB | Environmental Management Board | |
| EMI | Environmental Management Institute | |
| EMPACT | Environmental Monitoring for Public Access and Community Tracking | |
| EMR | Environmental Management Report | |
| EMS | Enforcement Management System | |
| EMS | Environmental Management System | |
| EMS | Emergency Response System | |
| EMSL | Environmental Monitoring Support Systems Laboratory | |
| EMTS | Environmental Monitoring Testing Site | |
| EMTS | Exposure Monitoring Test Site | |
| EnPA | Environmental Performance Agreement | |
| EnPPA | Environmental Performance Partnership Agreement | |
| ENSR | Enhanced New Source Review | |
| EO | Ethylene Oxide | |
| EOC | Emergency Operating Center | |
| EOD | Explosive ordnance disposal | |
| EOF | Emergency Operations Facility (RTP) | |
| EOP | End Of Pipe | |
| EOT | Emergency Operations Team | |
| EP | Earth Protectors | |
| EP | Environmental Profile | |
| EP | End-use Product | |
| EP | Experimental Product | |
| EP | Extraction Procedure | |
| EP tox | Extraction Procedure Toxicity Characteristic | |
| EPA | Environmental Protection Agency | |
| EPA | U.S. Environmental Protection Agency | |
| EPAA | Environmental Programs Assistance Act | |
| EPAAR | EPA Acquisition Regulations | Business & Industry |
| EPACT | Environmental Policy Act | |
| EPC | Exposure Point Concentration | |
| EPCA | Energy Policy and Conservation Act | |
| EPCRA | Emergency Preparadness and Community Right to Know Act (IDEM) | Emergency Preparadness and Community Right to Know Act (EPA) |
| 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 | |
| EQL | Estimated Quantitation Limit | |
| EQSC | Environmental Quality Service Council | |
| ER | Ecosystem Restoration | |
| ER | Electrical Resistivity | |
| ERA | Economic Regulatory Agency | |
| ERAG | Ecological Risk Assessment Guidance | |
| ERAMS | Environmental Radiation Ambient Monitoring System | |
| ERC | Emergency Response Commission | |
| ERC | Emissions Reduction Credit | |
| ERC | Environmental Research Center | |
| ERCS | Emergency Response Cleanup Services | |
| ERD&DAA | Environmental Research, Development and Demonstration Authorization Act | |
| ERDA | Energy Research and Development Administration | |
| EREF | Environmental Research and Education Foundation | |
| ERL | Environmental Research Laboratory | NOAA Research Organizations (formerly under ERL) |
| ERNS | Emergency Response Notification System | National Response Center (formerly ERNS) |
| ERP | Early Reduction Program | |
| ERP | Enforcement Response Policy | |
| ERRIS | Emergency Remedial Response Inventory System | |
| ERT | Emergency Response Team | |
| ERTAQ | ERT Air Quality Model | |
| ES | Enforcement Strategy | |
| ESA | Endangered Species Act | Endangered Species Program |
| ESA | Environmentally Sensitive Area | |
| ESC | Endangered Species Committee | |
| ESCA | Electron Spectroscopy for Chemical Analysis | |
| ESCAP | Economic and Social Commission for Asia and the Pacific | |
| ESE | Environmental Science and Engineering, Inc. | |
| ESECA | Energy Supply and Environmental Coordination Act | |
| ESH | Environmental Safety and Health | |
| ESI | Expanded Site Investigation | |
| ESI/RI | Expanded Site Investigation/Remedial Investigation | |
| ESP | Electrostatic Precipitators | |
| ESRI | Environmental Systems Research Institute | |
| ET | Emissions Trading | |
| ETI | Environmental Technology Initiative | |
| ETP | Emissions Trading Policy | |
| ETS | Emissions Tracking System | |
| ETS | Environmental Tobacco Smoke | |
| ETV | Environmental Technology Verification Program | |
| EUP | End-Use Product | |
| EUP | Experimental Use Permit | |
| EWCC | Environmental Workforce Coordinating Committee | |
| EXAMS | Exposure Analysis Modeling System | |
| ExEx | Expected Exceedance | |
| F | Fehrenheit | |
| F/M | Food to Microorganism Ratio | |
| FAA | Federal Aviation Administration | |
| FACA | Federal Advisory Committee Act | |
| FAN | Fixed Account Number | |
| FAO | Food and Agricultural Organization | |
| FATES | FIFRA and TSCA Enforcement System | |
| FB | Field Blank | |
| FBC | Fluidized Bed Combustion | |
| FBH | Fort Benjamin Harrison | |
| FBI | Federal Bureau of Investigation | |
| FCA | Fish Consumption Advisory | |
| FCC | Fluid Catalytic Converter | |
| FCCC | Framework Convention on Climate Change | |
| FCCU | Fluid Catalytic Cracking Unit | |
| FCO | Federal Coordinating Officer (in disaster areas) | |
| FCO | Forms Control Officer | |
| FDA | Food and Drug Administration | |
| 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 | |
| FEMA | Federal Emergency Management Agency | |
| FEPCA | Federal Environmental Pesticide Control Act; enacted as amendments to FIFRA. | |
| FERC | Federal Energy Regulatory Commission | |
| FES | Factor Evaluation System | |
| FESOP | Federally Enforceable State Operating Permit | |
| FEV | Forced Expiratory Volume | |
| FEV1 | Forced Expiratory Volume--one second | |
| FEV1 | 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 | |
| FFY | Federal Fiscal Year | |
| FGD | Flue-Gas Desulfurization | |
| FI | Facility Information | |
| 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 | |
| FM | Fire Marshal (Office of the State) | |
| FMAP | Financial Management Assistance Project | |
| FML | Flexible Membrane Liner | |
| FMP | Facility Management Plan | |
| FMP | Financial Management Plan | |
| FMS | Financial Management System | |
| FMVCP | Federal Motor Vehicle Control Program | |
| FO | Final Order | |
| 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 | Flash Point | |
| FP | Fine Particulate | |
| FPA | Federal Pesticide Act | |
| FPAS | Foreign Purchase Acknowledgement Statements | |
| FPD | Flame Photometric Detector | |
| FPEIS | Fine Particulate Emissions Information System | |
| FPPA | Federal Pollution Prevention Act | |
| FPR | Federal Procurement Regulation | |
| FQPA | Food Quality Protection Act | |
| FR | Federal Register | |
| FR | 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 | |
| FRN | Final Rulemaking Notice | |
| FRPS | Formal Planning and Supporting System | |
| FRPS | Federal Program Resources Statement | |
| FRS | Facility Registry System (EPA) | |
| FRS | Formal Reporting System | |
| FS | Feasibility Study | |
| FSA | Food Security Act | |
| FSP | Field Sampling Plan | |
| FSR | Financial Status Report | |
| FSS | Fixated Scrubber Sludge | |
| FSS | Facility Status Sheet | |
| FSS | 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 Administration | |
| FWPCA | Federal Water Pollution and Control Act (aka CWA) | |
| FY | Fiscal Year | |
| FYI | For Your Information | |
| G/T | Generator/Transporter | |
| GAAP | Generally Accepted Accounting Principles | |
| GAC | Granular Activated Carbon | |
| GACT | Granular Activated Carbon Treatment | |
| GAFB | Grissom Air Force Base | |
| GAO | General Accounting Office | |
| GAW | Global Atmosphere Watch | |
| GC/MS | Gas Chromatography/Mass Spectrometry | |
| GC/MS | Gas Chromatograph/Mass Spectrograph | |
| GCC | Global Climate Convention | |
| GCWR | Gross Combination Weight Rating | |
| GDE | Generic Data Exemption | |
| GDP | Gross Domestic Product | |
| GEI | Geographic Enforcement Initiative | |
| GEMI | Global Environmental Management Initiative | |
| GEMS | Global Environmental Monitoring System | GEMS Water |
| GEMS | Graphical Exposure Modeling System | |
| GEP | Good Engineering Practice | |
| GFAAS | Graphite Furnace Atomic Adsorption Spectrophometer | |
| GFF | Glass Fiber Filter | |
| GFO | Grant Funding Order | |
| GFS | Government-Furnished Property | |
| GHG | Green House Gas | |
| GICS | Grant Information and Control System | |
| GIS | Geographic Information Systems | |
| GIS | Global Indexing System | |
| GLAD | Great Lakes Atmospheric Deposition Network | |
| GLC | Gas Liquid Chromatography | |
| GLERL | Great Lakes Environmental Research Laboratory | |
| GLISP | Great Lakes International Surveillance Plan | |
| GLNPO | Great Lakes National Program Office | |
| GLP | Good Laboratory Practices | |
| GLPN | Great Lakes Precipitation Network | |
| GLPPR | Great Lakes Pollution Prevention Roundtable | |
| GLWQA | Great Lakes Water Quality Agreement | |
| GMCC | Global Monitoring for Climatic Change | |
| 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 | |
| GPD | Gallons per Day | |
| GPG | Grams-per-Gallon | |
| GPM | Gallons per Minute | |
| GPR | Ground-Penetrating Radar | |
| GPRA | Governmental Performance and Results Act (IDEM) | |
| GPS | Groundwater Protection Strategy | |
| GPS | Global Positioning System | |
| GR | Grab Radon Sampling | |
| GRAS | Generally Recognized as Safe | |
| GRCDA | Government Refuse Collection and Disposal Association | |
| GRGL | Groundwater Residue Guidance Level | |
| GRR | Ground Water Record Review | |
| GSA | Geological Society of America | |
| GT | Gas Turbine | |
| GTN | Global Trend Network | |
| GTR | Government Transportation Request | |
| GVL | Geology Violation Letter (IDEM) | |
| GVP | Gasoline Vapor Pressure | |
| GVW | Gross Vehicle Weight | |
| GVWR | Gross Vehicle Weight Rating | |
| GW | Grab Working-Level Sampling | |
| GW | Ground Water or Groundwater | |
| GWCC | Ground Water Contaminant Concentration | |
| GWDR | Ground Water Disinfection Rule | |
| GWM | Ground Water Monitoring | |
| GWP | Global Warming Potential | |
| GWPC | Ground Water Protection Council | |
| GWPS | Ground Water Protection Strategy | |
| GWPS | Ground Water Protection Standard | |
| GWQS | Ground Water Quality Standard (Indiana) | |
| GWUDI | Ground Water Under the Direct Influence of Surface Water | |
| H2O2 | hydrogen peroxide | |
| HA | Health Advisory | |
| HAA5 | Haloacetic Acids (five) | |
| HAD | Health Assessment Document | |
| HAP | Hazardous Air Pollutant | |
| HAPEMS | Hazardous Air Pollutant Enforcement Management System | |
| HAPPS | Hazardous Air Pollutant Prioritization System | |
| HAS | Hollow Stem Auger | |
| HASP | Health and Safety Plan | |
| HATREMS | Hazardous and Trace Emissions System | |
| HAZMAT | Hazardous Materials | |
| HAZOP | Hazard and Operability Study | |
| HAZWOPER | Hazardous Waste Operations and Emergency Response | |
| HBFC | Hydrobromofluorocarbon | |
| HC | Hazardous Constituents | |
| HC | Hydraulic Conductivity | |
| HC | Hydrocarbon | |
| HCCPD | Hexachlorocyclo-pentadiene | |
| HCFC | Hydrochlorofluorocarbon | |
| HCP | Hypothermal Coal Process | |
| HCS | Hazard Communication Standard | |
| HD | Health Department | |
| HDD | Heavy-Duty Diesel | |
| HDDS | Heavy-Duty Diesel Settlement | |
| 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 | |
| HDT | Heavy-Duty Truck | |
| HDV | Heavy-Duty Vehicle | |
| HEAL | Human Exposure Assessment Location | |
| HEAST | Health Effects Assessment Summary Tables | |
| HEC | Hoosier Environmental Council | |
| HECC | House Energy and Commerce Committee | |
| HEI | Health Effects Institute | |
| HEM | Human Exposure Modeling | |
| HEPA | Highly Efficient Particulate Air Filter | |
| HEPA | High-Efficiency Particulate Air | |
| HERS | Hyperion Energy Recovery System | |
| HFC | Hydrofluorocarbon | |
| HHDDV | Heavy Heavy-Duty Diesel Vehicle | |
| HHE | Human Health and the Environment | |
| HHS | U.S. Department of Health and Human Services | |
| HHV | Higher Heating Value | |
| HHW | Household Hazardous Waste | |
| 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 | |
| HMTUSA | Hazardous Materials Transportation and Uniform Safety Act | |
| 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 | |
| HPV | High Priority Violation | |
| HQ | Headquarters | |
| HQ | Hazard Quotient | |
| HQCDO | Headquarters Case Development Officer | |
| HR | Hazardous substance disposal or release (CERFA speicifc) | |
| HR | Human Resources | |
| HRC | Hydrogen Release Compound | |
| HRS | Hazardous Ranking System | |
| HRS | Hazard Ranking System | |
| HRUP | High-Risk Urban Problem | |
| HS | Homeland Security | |
| HS | Hazardous substance storage (CERFA specific) | |
| HSA | Hollow Stem Auger | |
| HSDB | Hazardous Substance Data Base | |
| HSL | Hazardous Substance List | |
| HSP | Health and Safety Plan | |
| HSWA | Hazardous and Solid Waste Amendments (IDEM) | |
| HT | Hypothermally Treated | |
| HTP | High Temperature and Pressure | |
| HUD | U. S. Housing and Urban Development | |
| 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 | |
| HWGTF | Hazardous Waste Groundwater Test Facility | |
| HWIR | Hazardous Waste Identification Rule | |
| HWLDF | Hazardous Waste Land Disposal Facility | |
| HWLF | Hazardous Waste Landfill | |
| HWLT | Hazardous Waste Land Treatment | |
| HWM | Hazardous Waste Management | |
| HWRTF | Hazardous Waste Restrictions Task Force | |
| HWSA | Hazardous Waste Site Assessment | |
| HWSU | Hazardous Waste Storage Units | |
| HWTC | Hazardous Waste Treatment Council | |
| I&M | Vehicle Inspection & Maintenance | |
| I/A | Innovative/Alternative | |
| I/M | Inspection/Maintenance | |
| I/SW | Industrial/Special Waste (IDEM) | |
| IA | Integrated Assessment | |
| IA | Interagency Agreement | |
| IAAC | Interagency Assessment Advisory Committee | |
| IAC | Indiana Administrative Code | |
| IACT | Indiana Association of Cities and Towns | |
| IADN | Integrated Atmospheric Deposition Network | |
| IAEA | International Atomic Energy Agency | |
| IAG | Interagency Agreement | |
| IAP | Indoor Air Pollution | |
| IAP | Incentive Awards Program | |
| 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 | Indiana Code | |
| 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 | |
| ICE | Internal Combustion Engine | |
| ICFAR | Indiana Center for Advance Research, Inc. | |
| ICP | Inductively Coupled Plasma | |
| ICR | Information Collection Request | |
| ICRE | Ignitability, Corrosivity, Reactivity, Extraction | |
| ICRP | International Commission on Radiological Protection | |
| ICRU | International Commission on Radiation Units and Measurements | |
| ICS | Intermittent Control System | |
| ICs | Institutional Controls | |
| ICS | Incident Command System | |
| ICS | Institute for Chemical Studies | |
| ICS | Intermittent Control Strategies | |
| ICWM | Institute for Chemical Waste Management | |
| ID | Inner Diameter | |
| IDEM | Indiana Department of Environmental Management | |
| IDETS | Indiana Department of Employee Training Services | |
| IDHS | Indiana Department of Homeland Security | |
| IDLH | Immediately Dangerous to Life and Health | |
| IDNR | Indiana Department of Natural Resources | |
| IEB | International Environment Bureau | |
| IEHA | Indiana Environmental Health Association | |
| IEI | Indiana Environmental Institute | |
| IEMP | Integrated Environmental Management Project | |
| IERC | Indiana Emergency Response Commission | |
| IERC | Indiana Emergency Response Coordination | |
| IES | Institute for Environmental Studies | |
| IESA | Electronic Subscriber Agreement | |
| IFB | Invitation for Bid | |
| IFCAM | Industrial Fuel Choice Analysis Model | |
| IFCS | Intergovernmental Forum on Chemical Safety | |
| IFES | Indiana Forum Environmental Safety | |
| IFIS | Industry File Information System | |
| IFIS | Indiana Facility Information System | |
| IFMO | Indiana Fire Marshall Office | |
| IFMS | Integrated Financial Management System | |
| IFPP | Industrial Fugitive Process Particulate | |
| IFRS | Indiana Facility Registry System (IDEM) | |
| IG | Indiana Geologists | |
| IGCC | Integrated Gasification Combined Cycle | |
| IGCI | Industrial Gas Cleaning Institute | |
| IGCN | Indiana Government Center North | |
| IGCS | Indiana Government Center South | |
| IGIC | Indiana Geographic Information Council | |
| IGISI | Indiana Geographic Information System Initiative | |
| IGS | Indiana Geological Survey | |
| IINERT | In-Place Inactivation and Natural Restoration Technologies | |
| IIOA | Indiana Industrial Operators Association | |
| IIS | Inflationary Impact Statement | |
| IJC | International Joint Commission (on Great Lakes) | |
| IKE | Improving Kids’ Environment | |
| IMA | Indiana Manufacturers’ Association | |
| IMM | Intersection Midblock Model | |
| IMPACT | Integrated Model of Plumes and Atmosphere in Complex Terrain | |
| IMPROVE | Interagency Monitoring of Protected Visual Environment | |
| IN | Indiana | |
| IN | Incinerator | |
| INAAP | Indiana Army Ammunition Plant | |
| INAWDAC | International Agency Water Data Committee | |
| INDOT | Indiana Department of Transportation | |
| INPUFF | Gaussian Puff Dispersion Model | |
| INT | Intermittent | |
| IOB | Iron Ore Beneficiation | |
| IOC | Inorganic Chemicals | |
| IOSHA | Indiana Occupational Safety and Health Administration | |
| IOU | Input/Output Unit | |
| IP | Inhalable Particles | |
| IPCC | Intergovernmental Panel on Climate Change | |
| IPCS | International Program on Chemical Safety | |
| IPECA | Indiana Petroleum Equipment Contractors Association | |
| IPM | Integrated Pest Management | |
| IPM | Inhalable Particulate Matter | |
| IPM | Integrated Pest Management | |
| IPP | Integrated Plotting Package | |
| IPP | Inter-media Priority Pollutant (document) | |
| IPP | Implementation Planning Program | |
| IPP | Independent Power Producer | |
| IR | Indiana Register | IDEM's Guide for Citizen Participation |
| IRATS | Indiana RCRA Activity Tracking System | |
| IRG | Interagency Review Group | |
| IRIS | Integrated Risk Information System | |
| IRIS | Instructional Resources Information System | |
| IRLG | Interagency Regulatory Liaison Group (Composed of EPA, CPSC, FDA, and OSHA) | |
| 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 | |
| IRRF | Indianapolis Resource Recovery Facility | |
| IRS | International Referral Systems | |
| IS | Interim Status | |
| ISAM | Indexed Sequential File Access Method | |
| ISBH | Indiana State Board of Health (Department of Health) | |
| ISBN | International Standard Book Number | |
| ISC | Industrial Source Complex | |
| ISCL | Interim Status Compliance Letter | |
| ISCLT | Industrial Source Complex Long Term Model | |
| ISCO | In-Situ Chemical Oxidation | |
| ISCST | Industrial Source Complex Short Term Model | |
| ISD | Interim Status Document | |
| ISDH | Indiana State Department Health | Board of Health |
| ISE | Ion-specific electrode | |
| ISM | Indiana Scoring Model | |
| ISMAP | Indirect Source Model for Air Pollution | |
| ISO | International Organization for Standardization | |
| ISO | International Standard Organization | |
| ISPF | (IBM) Interactive System Productivity Facility | |
| ISPLS | Indiana Society of Professional Land Surveyors | |
| ISS | Interim Status Standards | |
| I-STEPS | Indiana State Emissions Processing System | |
| IT | Information Technology | |
| ITC | Interagency Testing Committee | |
| ITC | Innovative Technology Council | |
| ITRC | Interstate Technology Regulatory Coordination | |
| ITRC | Interstate Technology Regulating Commission | |
| ITRD | Innovative Treatment Remediation Demonstration | |
| IUP | Intended Use Plan | |
| IUR | Inventory Update Rule | |
| IW | Industrial Waste (IDEM) | |
| IWC | In-Stream Waste Concentration | |
| IWEA | Indiana Water Environment Association | |
| IWPCA | Indiana Water Pollution Control Association | |
| IWPP | Industrial Wastewater Pretreatment Permits | |
| IWRA | Indiana Water Resources Association | |
| IWRA | Indiana Water Resources Association | |
| IWS | Ionizing Wet Scrubber | |
| JAPCA | Journal of Air Pollution Control Association | |
| JAWMA | Journal of Air and Waste Management Association | |
| JCL | Job Control Language | |
| JEC | Joint Economic Committee (Senate) | |
| JEC | Joint Economic Committee (House) | |
| 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 | |
| K | Hydraulic Conductivity | |
| L | Lead –based paint (CERFA specific) | |
| LAA | Lead Agency Attorney | |
| LADCO | Lake Michigan Air Directors Consortium | |
| LADD | Lifetime Average Daily Dose | |
| LADD | Lowest Acceptable Daily Dose | |
| LAER | Lowest Achievable Emission Rate | |
| LAI | Laboratory Audit Inspection | |
| LAMP | Lake Acidification Mitigation Project | |
| LC | Liquid Chromatography | |
| LC | Lethal Concentration | |
| LCA | Life Cycle Assessment | |
| LCD | Local Climatological Data | |
| LCL | Lower Control Limit | |
| LCM | Life Cycle Management | |
| LCRS | Leachate Collection and Removal System | |
| LCS | Laboratory Control Sample | |
| LD | Lethal Dose | |
| LD | Light Duty | |
| LD | Land Disposal | |
| LD L0 | The lowest dosage of a toxic substance that kills test organisms. | |
| 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 | |
| LDT | Lowest Dose Tested | |
| LDV | Light-Duty Vehicle | |
| LEAP | Learning and Environmental Awareness Partnership | |
| LEL | Lowest Effect Level | |
| LEL | Lower Explosive Limit | |
| LEP | Laboratory Evaluation Program | |
| LEPC | Local Emergency Planning Committee | |
| LERC | Local Emergency Response Committee | |
| LEV | Low Emissions Vehicle | |
| LFB | Laboratory Fortified Blank | |
| 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 | |
| LMOP | Landfill Methane Outreach Program | |
| LMRBR | Liquid Metal Fast Breeder Reactor | |
| LMTF | Lake Michigan Task Force | |
| LNAPL | Light Non-Aqueous Phase Liquid | |
| LOAEL | Lowest-Observed-Adverse-Effect-Level | |
| LOD | Limit of Detection | |
| LOD | Letter of Deficiency | |
| LOW | Letter of Warning (IDEM Enforcement) | |
| LPC | Land Pollution Control | |
| LPG | Licensed Professional Geologist | |
| LQER | Lesser Quantity Emission Rates | |
| LQG | Large Quantity Generator | |
| LRTAP | Long Range Transboundary Air Pollution | |
| LSA | Legislative Services Agency | |
| LTF | Land Treatment Facility | |
| LTTD | Low Temperature Themal Desorption | |
| LUIS | Label Use Information System | |
| LUST | Leaking Underground Storage Tank | |
| MAC | Mobile Air Conditioner | |
| MACS | Media and Communication Services (IDEM) | |
| MACT | Maximum Achievable Control Technologies | |
| 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 | |
| MEK | Methyl Ethyl Keytone | |
| MEP | Multiple Extraction Procedure | |
| METS | Multimedia Enforcement Tracking System | |
| MFIS | Municipal Facility Information System | |
| MFL | Millions of Fibers per Liter | |
| mg/L | Milligrams Per Liter | |
| MHDDV | Medium Heavy-Duty Diesel Vehicle | |
| MM | Multimedia | |
| MMSOILS | Multimedia Contaminants Fate, Transport, and Exposure Model | |
| MNA | Monitored Natural Attenuation | |
| MOA | Memorandum of Agreement | |
| MOBILE5A | Mobile Source Emission Factor Model | |
| MOE | Margin Of Exposure | |
| MOS | Margin of Safety | |
| MOS | Measure of Success | |
| MOU | Memorandum of Understanding | |
| MP | Manufacturing-use Product | |
| MP | Melting Point | |
| MPCA | Microbial Pest Control Agent | |
| MPE | Multi Phase Extraction | |
| MPI | Maximum Permitted Intake | |
| MPN | Maximum Possible Number | |
| MPWC | Multiprocess Wet Cleaning | |
| MRDL | Maximum Residual Disinfectant Level | |
| MRDLG | Maximum Residual Disinfectant Level Goal | |
| MRF | Materials Recovery Facility | |
| MRID | Master Record Identification number | |
| MRL | Maximum-Residue Limit (Pesticide Tolerance) | |
| MS/MSD | Matrix Spike/Matrix Spike Duplicate | |
| MSCA | Multi-Site Cooperative Agreement | |
| MSDS | Material Safety Data Sheet | |
| MSL | Mean Sea Level | |
| MSOP | Minor Source Operating Permit | |
| MSOP | Minor State Operating Permit | |
| MSRAS | Midwest States Risk Assessment Symposium | |
| MSW | Municipal Solid Waste | |
| MSWLF | Municipal Solid Waste Landfill Facility | |
| MTBE | Methyltertiary butyl ether | |
| MTD | Maximum Tolerated Dose | |
| MTP | Maximum Total Trihalomethane Potential | |
| MUP | Manufacturing-Use Product | |
| MUTA | Mutagenicity | |
| MVAC | Motor Vehicle Air Conditioning | |
| MW | Monitoring Well | |
| MWC | Machine Wet Cleaning | |
| MWWTP | Municipal Waste-Water Treatment Plant | |
| N/A | Not Applicable | |
| N/A | Not Available | |
| ne | Effective Porosity | |
| N2O | Nitrous Oxide | |
| NA | U.S. National Archives | |
| NA | Nonattainment | |
| NAA | Nonattainment Area | |
| NAAEC | North American Agreement on Environmental Cooperation | |
| NAAQM | National Ambient Air Quality Monitoring | |
| NAAQS | National Ambient Air Quality Standards | |
| NACA | National Agricultural Chemicals Association | |
| NACEPT | National Advisory Council for Environmental Policy and Technology | |
| NACWA | National Association of Clean Water Agencies | |
| NAFSMA | National Association of Flood & Stormwater Management Agencies | |
| NALM | North American Lake Management | |
| NALMS | North American Lake Management Society | |
| NAMA | National Air Monitoring Audits | |
| NAMS | National Air Monitoring Stations | |
| NAPAP | National Acid Precipitation Assessment Program | |
| NAPD/NTN | National Atmospheric Deposition Program/National Trends Network | |
| NAPL | Non-Aqueous Phase Liquid | |
| NAPS | National Air Pollution Surveillance | |
| NAR | National Asbetos Registry | |
| NARA | National Agrichemical Retailers Association | |
| NARA | National Air Resources Act | |
| NARA | U.S. National Archives and Record Administration | |
| NARTSO | North American Research Strategy for Tropospheric Ozone | |
| NAS | National Academy of Sciences | |
| NASDA | National Association of State Departments of Agriculture | |
| NATICH | National Air Toxics Information Clearinghouse | |
| NCAMP | National Coalition Against the Misuse of Pesticides | |
| NCEA | National Center for Environmental Assessment | |
| NCEPI | National Center for Environmental Publications and Information | |
| NCP | National Contigency Plan | |
| NCWS | Non-Community Water System | |
| NEDRES | National Environmental Data Referral Service (NOAA) | |
| NEDS | National Emissions Data System | |
| NEERI | National Environmental Engineering Research Institute | |
| NEHA | National Environmental Health Association | |
| NEPA | National Environmental Policy Act | |
| NEPI | National Environmental Policy Institute | |
| NEPPS | National Environmental Performance Partnership System | |
| NESHAP | National Emission Standard for Hazardous Air Pollutants | |
| NESHTA | National Environmental, Safety, and Health Training Organization | |
| NET | National Environmental Testing | |
| NETA | National Environmental Training Association | |
| NFA | No Further Action | |
| NFRAP | No Further Remedial Action Planned | |
| NGF | U.S. EPA National Functional Guidelines for Organic and Inorganic Data Review | |
| NGVD | National Geodetic Vertical Datum | |
| NGWA | National Ground Water Association | |
| NICT | National Incident Coordination Team | |
| NIEHS | National Institute for Environmental Health Sciences | |
| NIMBY | Not In My Backyard | |
| NIOSH | National Institute of Occupational Safety and Health | |
| NIRPC | Northwest Indiana Regional Plan Commission | |
| NISAC | National Industrial Security Advisory Committee | |
| NIST | National Institute of Standards and Technology | |
| NLM | National Library of Medicine | |
| NMFS | National Marine Fisheries Service | |
| NMHC | Nonmethane Hydrocarbons | |
| NMOC | Non-Methane Organic Component | |
| NMSWLF | Non-Municipal Solid Waste Landfill Facility | |
| NMVOC | Non-methane Volatile Organic Chemicals | |
| NO | Nitric Oxide | |
| NOA | Notice of Arrival | |
| NOAA | National Oceanographic and Atmospheric Agency | |
| NOAC | Nature of Action Code | |
| NOAEL | No Observable Adverse Effect Level | |
| NOD | Natural Oxygen Demand | |
| NOD | Notice of Deficiency | |
| NOD | Notice of Decision | |
| NOEL | No Observable Effect Level | |
| NOI | Notice of Intent | |
| NOIC | Notice of Intent to Cancel | |
| NOIS | Notice of Intent to Suspend | |
| NonMSWLF | Non-Municipal Solid Waste Landfill Facility | |
| NOPH | Notice of Public Hearing | |
| NOR | Notice of Receipt | |
| NORM | Naturally Occurring Radioactive Material | |
| NOV | Notice of Violation | |
| NOx | Nitrogen Oxides | |
| NPCA | National Pest Control Association | |
| NPD | Nonrule Policy Document | |
| NPDES | National Pollutant Discharge Elimination System (State) | |
| NPDES | National Pollutant Discharge Elimination System (Federal) | |
| NPDWR | National Primary Drinking Water Regulation | |
| NPHAP | National Pesticide Hazard Assessment Program | |
| NPIRS | National Pesticide Information Retrieval System | |
| NPL | National Priorities List | |
| NPMP | National Pesticide Monitoring Program | |
| NPPR | National Pollution Prevention Roundtable | |
| NPS | Nonpoint Source | |
| NPS | U.S. National Park Service | |
| NPTN | National Pesticide Telecommunications Network | |
| NRC | National Response Center | |
| NRC | National Recycling Coalition | |
| NRC | U.S. Nuclear Regulatory Commission | |
| NRCS | Natural Resources Conservation Service | |
| NRD | Natural Resource Damage | |
| NRDA | National Recourse Damage Assessment | |
| NRDC | Natural Resources Defense Council | |
| NRMD | National Resources Management Division | |
| NRO | Northern Regional Office | |
| NRWA | National Rural Water Association | |
| NSDWR | National Secondary Drinking Water Regulations | |
| NSEC | National System for Emergency Coordination | |
| NSEP | National System for Emergency Preparedness | |
| NSMP | National Soils Monitoring Program | |
| NSPE | National Society for Professional Engineers | |
| NSPS | New Source Performance Standards | |
| NSR | New Source Review | |
| NSWMA | National Solid Waste Management Association | |
| NTI | National Toxics Inventory | |
| NTIS | National Technical Information Service | |
| NTNCWS | Non-Transient Non-Community Water System | |
| NTP | National Toxicology Program | |
| NTU | nephelometric turbidity units | |
| NW | Northwest | |
| NWA | National Water Alliance | |
| NWF | National Wildlife Federation | |
| NWRO | Northwest Regional Office | |
| NWS | National Weather Service | |
| O&M | Operation and Maintenance | |
| O&M | Operations and Maintenance | |
| O/O | Owner/Operator | |
| O3 | Ozone | |
| OAM | Office of Air Management (IDEM) | |
| OAQ | Office of Air Quality (IDEM) | |
| OBDII | On-Board Diagnostic Testing | |
| OCCT | Optimal Corrosion Control Treatment | |
| OCCTR | Optimal Corrosion Control Treatment Recommendation | |
| OCD | Offshore and Coastal Dispersion | |
| OD | Outside Diameter | |
| OD | Open Dump | |
| ODP | Ozone-Depleting Potential | |
| ODS | Ozone-Depleting Substances | |
| OE | Office of Enforcement (IDEM) | |
| OEA | Office of Environmental Adjudication (OEA) | |
| OEA | Office of External Affairs (IDEM) | |
| OECA | Office of Enforcement and Compliance Assurance | |
| OECD | Organization for Economic Cooperation and Development | |
| OEI | Office of Environmental Investigations (IDEM) | |
| OER | Office of Environmental Response (IDEM) | |
| OF | Optional Form | |
| OLC | Office of Legal Council (IDEM) | |
| OLQ | Office of Land Quality (IDEM) | |
| OLTS | On Line Tracking System | |
| OMBA | Office of Management, Budget, and Administration (IDEM) | |
| OPA | Oil Pollution Act | |
| OPA | Office of Planning and Assessment | |
| OPPP | Office of Public Policy and Planning | |
| OPPTA | Office of Pollution Prevention and Technical Assistance (IDEM) | |
| ORC | Oxygen Release Compound | |
| ORM | Other Regulated Material | |
| ORP | Oxidation-Reduction Potential | |
| ORSANCO | Ohio River Sanitation Commission | |
| OSC | On-scene Site Coordinator | |
| OSHA | Occupational Health and Safety Administration | |
| OSHWM | Office of Solid and Hazardous Waste Management (IDEM) | |
| OSM | Office of Surface Mining (Federal) | |
| OSN | On-Site Notifier | |
| OSRW | Outstanding State Resource Water | |
| OSWER | Office of Solid Waste and Emergency Response | |
| OT | Overtime | |
| OTAG | Ozone Transport Assessment Group | |
| OTC | Ozone Transport Commission | |
| OTR | Ozone Transport Region | |
| OVC | Office of Voluntary Compliance (IDEM) | |
| OWM | Office of Water Management (IDEM) | |
| OWQ | Office of Water Quality (IDEM) | |
| P | Probable (CERFA specific) | |
| P | PCB(s) (CERFA specific) | |
| P | Parel (CERFA specific) | |
| P&E | Propellants and Explosives | |
| P&T | Pump and Treat | |
| P2 | Pollution Prevention | |
| P4P2 | Partners for Pollution Prevention | |
| PA | Preliminary Assessment | |
| PA/SI | Preliminary Assessment/Site Invesstigation | |
| PA/VSI | Preliminary Assessment / Visual Site Inspection | |
| PAG | Pesticide Assignment Guidelines | |
| PAH | Polynuclear Aromatic Hydrocarbons | |
| PAI | Pure Active Ingredient compound | |
| PAI | Performance Audit Inspection (CWA) | |
| PAM | Pesticide Analytical Manual | |
| PAMS | Photochemical Assessment Monitoring Stations | |
| PARCC | Precision, Accuracy, Represntiveness, Comparability, Completeness | |
| Part A | Interim Status Permit (EPA RCRA Hazardous Waste) | |
| Part B | Final Approval Permit (EPA RCRA Hazardous Waste) | |
| PAT | Permit Assistance Team (RCRA) | |
| PATS | Pesticide Action Tracking System | |
| PATS | Pesticides Analytical Transport Solution | |
| Pb | Lead | |
| PBA | Preliminary Benefit Analysis (BEAD) | |
| PBB | Polybrominated Biphenyl | |
| PBR | Permit by Rule | |
| PBT | Persistent Bioaccumulative Toxics | |
| PC | Post Closure | |
| PCA | Pentachloroanisole | |
| PCA | Principle Component Analysis | |
| PCB | Polychlorinated Biphenyl(s) | |
| PCCP | Post-Closure Care Period | |
| PCDD | Polychlorinated DiBenzo-P-Dioxin | |
| PCE | Tetrachloroethene (PCE) | |
| PCE | Pollution Control Equipment | |
| PCE | Perchloroethylene | |
| pCi | picocurie | |
| PCM | Phase Contrast Microscopy | |
| PCN | Policy Criteria Notice | |
| PCO | Pest Control Operator | |
| PCP | Pentachlorophenol | |
| PCS | Permit Compliance System | |
| PCSD | President's Council on Sustainable Development | |
| PDCI | Product Data Call-In | |
| Portable, Downloadable File | ||
| PE | Professional Engineer | |
| PE | Performance Evaluation | |
| PEC | Potential Exposure Concentration | |
| PEL | Permissble Exposure Limit | |
| PEMS | Particulate Emission Monitoring System | |
| PFC | Perfluorated Carbon | |
| PFCRA | Program Fraud Civil Remedies Act | |
| PFS | Phased Feasibility Study | |
| PGI | Professional Geologists of Indiana | |
| pH | Hydrogen-ion Activity | |
| PHC | Principal Hazardous Constituent | |
| PHI | Pre-Harvest Interval | |
| PHSA | Public Health Service Act | |
| PI | Program Information | |
| PI | Preliminary Injunction | |
| PIC | Products of Incomplete Combustion | |
| PIC | Public Involvement Coordinator | |
| PID | Photoionization Detector | |
| PIGS | Pesticides in Groundwater Strategy | |
| PIMS | Pesticide Incident Monitoring System | |
| PIN | Pesticide Information Network | |
| PIN | Procurement Information Notice | |
| PIP | Potentially Impacted Parties | |
| 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 | Program Manager | |
| PM | Project Manager | |
| PM | Permit Manager | |
| PM | Particulate Matter | |
| PM10 | Particulate Matter (nominally 10m and less) | |
| PM15 | Particulate Matter (nominally 15m and less) | |
| PM2.5 | Particulate Matter Smaller than 2.5 Micrometers in Diameter | |
| PMAS | Photochemical Assessment Monitoring Stations | |
| 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 | |
| PN | Public Notification | |
| PNA | Polynuclear Aromatic Hydrocarbons | |
| PO | Project Officer | |
| POC | Perimeter of Compliance | |
| POC | Point Of Compliance | |
| POE | Point of Entry | |
| POE | Point of Entry Treatment Device | |
| POE | Point Of Exposure | |
| POGO | Privately-Owned/ Government-Operated | |
| POHC | Principal Organic Hazardous Constituent | |
| POI | Point Of Interception | |
| POL | Petroleum, oil, and lubricants | |
| POLREP | Pollution Report | |
| POM | Particulate Organic Matter | |
| POM | Polycyclic Organic Matter | |
| POP | Persistent Organic Pollutant | |
| POR | Program of Requirements | |
| POTW | Publicly Owned Treatment Works | |
| POU | Point of Use | |
| POU | Point of Use Treatment Device | |
| POV | Privately Owned Vehicle | |
| PP | Program Planning | |
| PPA | Planned Program Accomplishment | |
| PPB | Parts Per Billion | |
| PPC | Personal Protective Clothing | |
| PPE | Personal Protective Equipment | |
| PPG | Performance Partnership Grant | |
| PPIC | Pesticide Programs Information Center | |
| PPIS | Pesticide Product Information System | |
| PPIS | Pollution Prevention Incentives for States | |
| PPLS | Pesticide Product Label System | |
| PPM | Parts Per Million | |
| PPM/PPB | Parts per million/parts per billion | |
| PPMAP | Power Planning Modeling Application Procedure | |
| PPSP | Power Plant Siting Program | |
| PPT | Parts Per Trillion | |
| PPTH | Parts Per Thousand | |
| PQL | Pratical Quantitation Limit | |
| PQUA | Preliminary Quantitative Usage Analysis | |
| PR | Pesticide Registration Notice | |
| PR | Preliminary Review | |
| PR | Petroleum disposal or release (CERFA specific) | |
| PRA | Paperwork Reduction Act | |
| PRA | 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 | Petroleum Storage (CERFA specific) | |
| 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 | |
| PSI | Pounds Per Square Inch | |
| PSI | Pressure Per Square Inch | |
| PSIG | Pressure Per Square Inch Gauge | |
| PSM | Point Source Monitoring | |
| PSNS | Pretreatment Standards for New Sources | |
| PSU | Primary Sampling Unit | |
| PT | Pump and Treat | |
| 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 | |
| PV | Project Verification | |
| PVC | Polyvinyl Chloride | |
| PW | Potable Water | |
| PWB | Printed Wiring Board | |
| PWS | Public Water Supply/System | |
| PWSID | Public Water Supply Identification Number | |
| PWSS | Public Water Supply System | |
| PX | Post exchange | |
| PZ | Piezometer | |
| Q | Qualified parcel (CERFA specific) | |
| QA | Quality Assurance | |
| QA/QC | Quality Assistance / Quality Control | |
| QA/QC | Quality Assurance / Quality Control | |
| QAC | Quality Assurance Coordinator | |
| QAM | Quality Assurance Manager | |
| QAMIS | Quality Assurance Management and Information System | |
| QAO | Quality Assurance Officer | |
| QAPP | Quality Assurance Project Plan | |
| QAPP | Quality Assurance Program Plan | |
| QATT | 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 | |
| QMP | Quality Management Plan | |
| QNCR | Quarterly Noncompliance Report | |
| QPA | Quality Purchase Agreement | |
| QUA | Qualitative Use Assessment | |
| QUIPE | Quarterly Update for Inspector in Pesticide Enforcement | |
| R | Radon (CERFA specific) | |
| R&D | Research and Development | |
| RA | Regional Administrator (USEPA) | |
| RA | Risk Assessment | |
| RA | Risk Analysis | |
| RA | Resource Allocation | |
| RA | Remedial Action | |
| RA | Regulatory Alternatives | |
| RA | Reasonable Alternative | |
| RA | Regulatory Analysis | |
| RAATS | RCRA Administrative Action Tracking System | |
| RAC | Raw Agricultural Commodity | |
| RAC | Radiation Advisory Committee | |
| RAC | Regional Asbestos Coordinator | |
| RAC | 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 | Regional Acid Deposition Model | |
| RADM | Random Walk Advection and Dispersion Model | |
| Rads | Radionuclide | |
| RAGS | Risk Assessment Guidance for Superfund | |
| RAI | Request for Additional Information | |
| RAL | Removal Action Levels | |
| 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 | Remedial Accomplishment Plan | |
| RAP | Response Action Plan | |
| RAP | Registration Assessment Panel | |
| RAP | Radon Action Program | |
| RAP | Remedial 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 | Risk-Based Concentration | |
| RBC | Red Blood Cell | |
| RC | Responsibility Center | |
| RCC | Radiation Coordinating Council | |
| RCDO | Regional Case Development Officer | |
| RCO | Regional Compliance Officer | |
| RCP | Research Centers Program | |
| RCR | Remediation Completion Report | |
| RCRA | Resource Conservation and Recovery Act | |
| RCRA BF | Brownfield Site that falls under RCRA Regulation | |
| RCRIS | Resource Conservation and Recovery Information System | |
| RD | Radionuclides (CERFA specific) | |
| RD&D | Research, Development and Demonstration | |
| RD/RA | Remedial Design/Remedial Action | |
| RDA | Recommended Daily Allowance | |
| RDF | Refuse-Derived Fuel | |
| RDNA | Recombinant DNA | |
| RDT | Remediation Completion Report | |
| RDU | Regional Decision Units | |
| RDV | Reference Dose Values | |
| RE | Reasonable Efforts | |
| RE | Reportable Event | |
| READ | Registry of EPA Applications and Databases | |
| REAP | Regional Enforcement Activities Plan | |
| RECLAIM | Regional Clean Air Initiatives Marker | |
| RED | Reregistration Eligibility Decision Document | |
| REDA | Recycling Economic Development Advocate | |
| REE | Rare Earth Elements | |
| REEP | Review of Environmental Effects of Pollutants | |
| REF | Reference | |
| 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 | |
| RFA | RCRA Facility Assessment | |
| RFB | Request for Bid | |
| RfC | Reference Concentration | |
| RfD | Reference Dose Values | |
| RfD | Reference Dose | |
| RFI | Remedial Field Investigation | |
| RFI | RCRA Facility Investigation | |
| RFP | Reasonable Further Programs | |
| RFP | Request for Proposal | |
| RHRS | Revised Hazard Ranking System | |
| RI | Reconnaissance Inspection | |
| RI | Remedial Investigation | |
| RI/FS | Remedial Investigation/ Feasibility Study | |
| RIA | Regulatory Impact Analysis | |
| RIA | Regulatory Impact Assessment | |
| RIC | Radon Information Center | |
| RICO | Racketeer Influenced and Corrupt Organizations Act | |
| RIM | Regulatory Interpretation Memorandum | |
| RIN | Regulatory Identifier Number | |
| RIP | RCRA Implementation Plan | |
| RISC | Risk Integrated System of Closure | |
| RISC | Regulatory Information Service Center | |
| RJE | Remote Job Entry | |
| RL | Review Letter | |
| 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 | |
| RME | Recommended Maximum Exposure | |
| RMIS | Resources Management Information System | |
| RMSD | Root-Mean-Square Deviation | |
| RNA | Ribonucleic Acid | |
| ROADCHEM | Roadway Version that Includes Chemical Reactions of BI, NO2, and O3 | |
| ROADWAY | A Model to Predict Pollutant Concentrations Near a Roadway | |
| ROC | Record Of Communication | |
| ROD | Record of Decision | |
| RODS | Records Of Decision System | |
| ROG | Reactive Organic Gases | |
| ROI | Radius Of Influence | |
| ROLLBACK | A Proportional Reduction Model | |
| ROM | Regional Oxidant Model | |
| ROP | Regional Oversight Policy | |
| ROP | Rate of Progress | |
| ROPA | Record Of Procurement Action | |
| ROSA | Regional Ozone Study Area | |
| RP | Radon Progeny Integrated Sampling | |
| RP | Respirable Particulates | |
| RP | Responsible Party | |
| RPAR | Rebuttable Presumption Against Registration | |
| RPD | Relative Percent Difference | |
| RPM | Remedial Project Manager | |
| RPM | Reactive Plume Model | |
| RPS | Responsible Party Search | |
| RPTL | Responsible Party (Property) Transfer Law | |
| RQ | Reportable Quantity | |
| RQ | Reportable Quantities | |
| RRC | Regional Response Center | |
| RRR | Reduce, Recycle, and Reuse | |
| RRT | Requisite Remedial Technology | |
| RRT | Regional Response Team | |
| RS | Registration Standard | |
| RSB | Remediation Services Branch | |
| RSCC | Regional Sample Control Center | |
| RSD | Risk-Specific Dose | |
| RSD | Regional Sewer District | |
| RSE | Removal Site Evaluation | |
| RSPA | Research and Special Programs Administration | |
| RSS | Ranked Set Sampling | |
| RTC | Return to Compliance | |
| 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 | |
| RWS | Restricted Waste Site I, II, III, or IV | |
| RWSX | Restricted Waste Site Unclassified | |
| S&A | Sampling and Analysis | |
| S&A | 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 | |
| SampDB | Office of Land Quality Sampling Database | |
| SAMWG | Standing Air Monitoring Work Group | |
| SANE | Sulfur and Nitrogen Emissions | |
| SANSS | Structure and Nomenclature Search System | |
| SAP | Sampling and Analysis Plan | |
| SAP | Scientific Advisory Panel | |
| SAR | Structural Activity Relationship (of a qualitative assessment) | |
| SAR | Start Action Request | |
| SARA | Superfund Amendments and Reauthorization Act of 1986 | |
| SAROAD | Storage and Retrieval Of Aerometric Data | |
| SAS | Special Analytical Service | |
| SAS | Statistical Analysis System | |
| SASS | Source Assessment Sampling System | |
| SAV | Submerged Aquatic Vegetation | |
| SB | Soil Boring | |
| SBC | Single Breath Canister | |
| SBS | Sick Building Syndrome | |
| SC | Section Chief (IDEM) | |
| SC | State Cleanup (IDEM) | |
| SC | Sierra Club | |
| SCAP | Superfund Consolidated Accomplishments Plan | |
| SCAS | Small Communities Advisory Committee | |
| SCBA | Self-Contained Breathing Apparatus | |
| SCC | Sample Control Coordinator (SCC) | |
| SCC | Source Classification Code | |
| SCD/SWCD | Soil or Soil and Water Conservation District | |
| SCDM | Superfund Chemical Data Matrix | |
| SCFM | Standard Cubic Feet Per Minute | |
| SCR | Selective Catalytic Reduction | |
| SCRAM | State Consolidated RCRA Authorization Manual | |
| SCRC | Superfund Community Relations Coordinator | |
| SCS | Supplementary Control Strategy/System | |
| SCS | Soil Conservation Service | |
| SCSA | Soil Conservation Society of America | |
| SCSP | Storm and Combined Sewer Program | |
| SCW | Supercritical Water Oxidation | |
| SD | Sediment | |
| SD | Site Discovery | |
| SDC | Save the Dunes Council | |
| 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 | |
| SEE | Senior Environmental Employment Program | |
| SEGIP | State Environmental Goals and Improvement Project | |
| SEIA | Socioeconomic Impact Analysis | |
| SEM | Standard Error of the Means | |
| SEM | Senior Environmental Manager | |
| SEMA | State Emergency Management Agency | |
| SEP | Supplementary Environmental Project | |
| SEP | Standard Evaluation Procedures | |
| SEPC | State Emergency Planning Commission | |
| SEPWC | Senate Environment and Public Works Committee | |
| SES | Secondary Emissions Standard | |
| SETAC | Society for Environmental Toxicology and Chemistry | |
| SETS | Site Enforcement Tracking System | |
| SF | Superfund | |
| SF | Standard Form | |
| 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 | |
| SFY | State Fiscal Year | |
| SGP | Strategic Goals Program | |
| SHORTZ | Short Term Terrain Model | |
| SHWL | Seasonal High Water Level | |
| SI | Spark Ignition | |
| SI | Site Inspection | |
| SI | Site Investigation | |
| SI | Surveillance Index | |
| SI | Surface Impoundment | |
| SI | International System of Units | |
| SIC | Standard Industrial Code | |
| SIC | Standard Industrial Classification | |
| SICEA | Steel Industry Compliance Extension Act | |
| SIF | Site Investigation Follow-up | |
| SIMS | Secondary Ion-Mass Spectrometry | |
| SIP | State Implementation Plan | |
| SIS | Site Investigation Site | |
| SITE | Superfund Innovative Technology Evaluation | |
| SL | Sanitary Landfill | |
| SLAMS | State/Local Air Monitoring Station | |
| SLN | Special Local Need | |
| 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 | |
| SMOCC | Sample Management Office CLP Coordinator | |
| 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 Noncompliance Action Program | |
| SNAP | Significant New Alternatives Project | |
| SNARL | Suggested No Adverse Response Level | |
| SNC | Significant Noncompliance | |
| SNC | Significant Noncompliers | |
| SNSM | Simple Line Source Model | |
| SNUR | Significant New Use Rule | |
| SOx | Sulfur Oxides | |
| SO2 | Sulfur Dioxide | |
| SOB | State Office Building | |
| SOC | Synthetic Organic Chemicals | |
| SOC | Synthetic Organic Compounds | |
| SOCMI | Synthetic Organic Chemicals Manufacturing Industry | |
| SOFC | Solid Oxide Fuel Cell | |
| SOP(S) | Standard Operating Procedure(s) | |
| SOTDAT | Source Test Data | |
| SOW | Scope Of Work | |
| SP | State Plane | |
| SPA | State Program Approval | |
| SPAR | Status of Permit Application Report | |
| SPCB | Stream Pollution Control Board | |
| SPCC | Spill Prevention, Containment, and Countermeasure | |
| SPD | State Personnel Department (Indiana) | |
| SPE | Secondary Particulate Emissions | |
| SPF | Structured Programming Facility | |
| SPI | Strategic Planning Initiative | |
| SPLMD | Soil-pore Liquid Monitoring Device | |
| SPLP | Synthetic Precipitation Leaching Procedure | |
| SPMS | Strategic Planning and Management System | |
| SPMS | 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 | |
| SRM | Standard Reference Material | |
| SRP | Special Review Procedure | |
| SRR | Submission Review Record | |
| SRR | Second Round Review | |
| SRS | Simple Random Sampling | |
| SRTS | Service Request Tracking System | |
| SS | Settleable Solids | |
| SS | Sanitary Survey | |
| SS | Suspended Solids | |
| SS | Superfund Surcharge | |
| SSA | Sole Source Aquifer | |
| SSAC | Soil Site Assimilated Capacity | |
| SSB | Science Services Branch (IDEM/OLQ) | |
| SSC | State Superfund Contracts | |
| SSD | Standards Support Document | |
| SSEIS | Standard Support and Environmental Impact Statement | |
| SSEIS | Stationary Source Emissions and Inventory System | |
| SSI | Statistically Significant Increase | |
| SSI | Size Selective Inlet | |
| SSMS | Spark Source Mass Spectrometry | |
| SSO | Sanitary Sewer Overflow | |
| SSO | Sanitary Sewer Overflow | |
| SSOA | Source Specific Operating Agreement | |
| 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 | State Acid Rain Projects | |
| STAR | Stability Wind Rose | |
| STARS | Strategic Targeted Activities for Results System | |
| STARS | Semi-annual Performance Measure Report | |
| STEL | Short Term Exposure Limit | |
| STEM | Scanning Transmission-Electron Microscope | |
| StEP | Statistical Evaluation Plan | |
| STINET | Scientific and Technical Information Network | |
| STN | Scientific and Technical Information Network | |
| STORET | Storage and Retrieval of Water-Related Data | |
| STP | Standard Temperature and Pressure | |
| STP | Sewage Treatment Plant | |
| StRS | Stratified Random Sampling | |
| STTP | Small Town Task Force (EPA) | |
| SU | Superfund Site (Indiana) | |
| SUP | Standard Unit of Processing | |
| SURE | Sulfate Regional Experiment Program | |
| SUVA | Specific Ultraviolet Adsorption at 254 nanometers | |
| SV | Significant Violator | |
| SV | Sampling Visit | |
| SVE | Soil Vapor Extraction | |
| SVOC | Semi-Volatile Organic Compound | |
| SW | Surface Water | Surface & Groundwater interaction |
| SW | Static Water | |
| SW | Special Waste | |
| SW | Solid Waste | |
| SW | Slow Wave | |
| SWANA | Solid Waste Association of North America | |
| SWAP | Source Water Assessment Program | |
| SWARF | Waste from Metal Grinding Process | |
| SWC | Settlement With Conditions | |
| SWDA | Solid Waste Disposal Act | |
| SWE | Society of Women Engineers | |
| SWL | Static Water Level | |
| SWLDF | Solid Waste Land Disposal Facility | |
| SWMB | Solid Waste Management Board | |
| SWMD | Solid Waste Management District | |
| SWMU | Solid Waste Management Unit | |
| SWP | Storm Water Plan | |
| SWPA | Source Water Protection Area | |
| SWQMS | Surface Water Quality Monitoring Strategy | |
| SWQPPP | Source Water Quality Protection Partnership Petitions | |
| SWRO | Southwest Regional Office | |
| SWTR | Surface Water Treatment Rule | |
| SyGS/rs | Systematic Grid Sampling with a Random Starting Point | |
| SYSOP | Systems Operator | |
| T | Transmissivity | |
| TAD | Technical Assistance Document | |
| TAG | Technical Assistance Grant | |
| TAL | Target Analyte List | |
| 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 | |
| TASO | Training Aids Service Office | |
| TAT | Technical Advisory Team | |
| TBA | To Be Announced | |
| TBD | To Be Determined | |
| TBT | Tributyltin | |
| TC | Toxicity Characteristics | |
| TC | Target Concentration | |
| TC | Technical Center | |
| TC | Toxic Concentration | |
| TCA | Trichloromethane | |
| TCDD | Dioxin (Tetrachlorodibenzo-p-dioxin) | |
| TCDF | Tetrachlorodi-benzofurans | |
| TCE | Trichloroethylene | |
| TCF | Total Chlorine Free | |
| TCL | Target Compound List | |
| TCLP | Total Concentrate Leachate Procedure | |
| TCLP | Toxicity Characteristic Leachate Procedure | |
| TCM | Transportation Control Measure | |
| TCP | Transportation Control Plan | |
| TCP | Trichloropropane | |
| TCRI | Toxic Chemical Release Inventory | |
| TD | Toxic Dose | |
| TDS | Total Dissolved Solids | |
| TEAM | Total Exposure Assessment Model | |
| TEC | Technical Evaluation Committee | |
| TEG | Tetraethylene Glycol | |
| TEGD | Technical Enforcement Guidance Document (USEPA) | |
| TEL | Tetraethyl Lead | |
| TEL | Threshold Effects Level | |
| TEM | Texas Episodic Model | |
| TEMPO | Tools for Environmental Management and Protection Organizations | |
| TEP | Technical Evaluation Panel | |
| TEP | Typical End-use Product | |
| TERA | TSCA Environmental Release Application | |
| TES | Technical Enforcement Support | |
| TGAI | Technical Grade of the Active Ingredient | |
| TGO | Total Gross Output | |
| TGP | Technical Grade Product | |
| THC | Total Hydrocarbons | |
| THM | Trihalomethane | |
| TI | Temporary Intermittent | |
| TI | Therapeutic Index | |
| TIBL | Thermal Internal Boundary Layer | |
| TIC | Tentatively Identified Compounds | |
| TIC | Technical Information Coordinator | |
| 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 | |
| TLF=V | Threshold Limit Value | |
| TLV-C | TLV-Ceiling | |
| TLV-TWA | TLV-Time Weighted Average | |
| TMDL | Total Maximum Daily Load | |
| TMDL | Total Maximum Daily Limit | |
| 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 | |
| TOH | Total Organic Halogens | |
| TOX | Tetradichloroxylene | |
| TP | Technical Product | |
| TP | Total Particulates | |
| TPC | Testing Priorities Committee | |
| TPH | Total Petroleum Hydrocarbons | |
| 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 | |
| TRADOC | U.S. Army Training and Doctrine Command | |
| 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 | |
| TRS | Terminology Reference System | |
| TRV | Toxicity Reference Value | |
| TS | Transfer Station (Solid Waste) | |
| TS | Tank System | |
| TSA | Technical Systems Audit | |
| TSCA | Toxic Substances Control Act | |
| TSCATS | TSCA Test Submissions Database | |
| TSD | Treatment, Storage, and Disposal | |
| TSD | Technical Support Document | |
| TSDF | Treatment, Storage, and Disposal Facility | |
| TSDG | Toxic Substances Dialogue Group | |
| TSDR | Treatment, Storage, Disposal and Reclaiming (facility) | |
| TSE | RCRA Brownfield Prevention Initiative's Targeted Site Effort | |
| TSI | Thermal System Insulation | |
| TSM | Transportation System Management | |
| TSO | Time Sharing Option | |
| TSP | Total Suspended Particulates | |
| TSS | Total Suspended (non-filterable) Solids | |
| TT | Treatment Technique | |
| TTFA | Target Transformation Factor Analysis | |
| TTHM | Total Trihalomethane | |
| TTN | Technology Transfer Network | |
| TTO | Total Toxic Organics | |
| TTY | Teletypewriter | |
| TVL-STEL | TLV-Short Term Exposure Limit | |
| TVOC | Total Volatile Organic Compounds | |
| TVOP | Title 5 Operating Permits | |
| 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 | |
| UCL | Upper Confidence Limit | |
| UDMH | Unsymmetrical Dimethyl Hydrazine | |
| UEL | Upper Explosive Limit | |
| UF | Uncertainty Factor | |
| UFL | Upper Flammability Limit | |
| ug/L | Microgram Per Liter | |
| Ug/m3 | Micrograms Per Cubic Meter | |
| UI | Underground Injection | |
| UIC | Underground Injection Control | |
| ULCERS | Underground Leaking, Community Right-to-Know and Emergency Response System | |
| ULEV | Ultra Low Emission Vehicles | |
| UMTRCA | Uranium Mill Tailings Radiation Control Act | |
| UNAMAP | Users' Network for Applied Modeling of Air Pollution | |
| USAEC | U.S. Army Environmental Center | |
| USAEHA | U.S. Army Environmental Hygiene Agency | |
| USAEHL | U.S. Army Environmental Health Laboratory | |
| USATHAMA | U.S. Army Toxic and Hazardous Materials Agency | |
| USCS | Unified Soil Classification System | |
| USDA | United States Department of Agriculture | |
| USDW | Underground Sources of Drinking Water | |
| USEPA | U.S. Environmental Protection Agency | |
| USFS | United States Forest Service | |
| USGS | US Geographical Service | |
| USGS | U.S. Geological Survey | |
| UST | Underground Storage Tank (IDEM) | |
| UTL | Upper Tolerance Limit | |
| UTM | Universal Transverse Mercator | |
| UTP | Urban Transportation Planning | |
| UV | Ultraviolet | |
| UVA, UVB, UVC | Ultraviolet Radiation Bands | |
| UVB | Ultraviolet Radiation Bands | |
| UVC | Ultraviolet Radiation Bands | |
| UWA | Unified Watershed Assessment | |
| UXO | Unexploded Ordnance | |
| 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 | |
| VFC | Virtual File Cabinet | |
| VHS | Vertical and Horizontal Spread Model | |
| VI | Vapor Intrusion | |
| VISTTA | Visibility Impairment from Sulfur Transformation and Transport in the Atmosphere | |
| VOC | Volatile Organic Compounds | |
| VOS | Vehicle Operating Survey | |
| VOST | Volatile Organic Sampling Train | |
| VP | Vapor Pressure | |
| VRA | Voluntary Remediation Agreement | |
| VRP | Voluntary Remediation Program (IDEM) | EPA guidance for developing Superfund MOA |
| VSD | Virtually Safe Dose | |
| VSI | Visual Site Inspection | |
| VSS | Volatile Suspended Solids | |
| Vx | Average Linear Velocity | |
| 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 | |
| WHPP | Wellhead Protection Plan | |
| WHPP | Wellhead Protection Program | |
| WHWT | Water and Hazardous Waste Team | |
| WICEM | World Industry Conference on Environmental Management | |
| WL | Warning Letter | |
| WL | Working Level (radon measurement) | |
| WL | Water Level | |
| WLA | Waste Load Allocation | |
| WLA/TMDL | Wasteload Allocation/Total Maximum Daily Load | |
| WLE | Water Level Elevation | |
| WMO | World Meteorological Organization | |
| WP | Waste Pile | |
| WP | Wettable Powder | |
| WP | Work Plan | |
| WPCB | Water Pollution Control Board | |
| WPCF | Water Pollution Control Federation | |
| WQBEL | Water Quality Based Effluent Limits | |
| WQM | Water Quality Management | |
| WQS | Water Quality Standard | |
| WRDA | Water Resources Development Act | |
| WRI | World Resources Institute | |
| WRS | Watershed Restoration Strategy | |
| WSF | Water Soluble Fraction | |
| WSRA | Wild and Scenic Rivers Act | |
| WSTB | Water Sciences and Technology Board | |
| WSTP | Wastewater Sewage Treatment Plant | |
| WT | Water Table | |
| WTP | Water Treatment Plant | |
| WW | Waste Water | |
| WWEMA | Waste and Wastewater Equipment Manufacturers Association | |
| WWF | World Wildlife Fund | |
| WWTP | Wastewater Treatment Plant | |
| WWTU | Wastewater Treatment Unit | |
| X | Unexploded ordnance (CERFA specific) | |
| XRF | X-Ray Fluorescence | |
| YTD | Year to Date | |
| ZEV | Zero Emissions Vehicle | |
| ZHE | Zero Headspace Extractor | |
| ZOI | Zone Of Incorporation | |
| ZRL | Zero Risk Level |
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