| ALAD | delta-aminolevulinic acid dehydratase |
| AMD | acid mine drainage |
| AOC | administrative order on consent or area of contamination |
| ARARs | applicable or relevant and appropriate requirements |
| ARPA | Archeological Resources Protection Act |
| ATSDR | Agency for Toxic Substances and Disease Registry |
| AWQC | ambient water quality criteria (national recommended water quality criteria) |
| BLM | Bureau of Land Management |
| CAC | Citizen's Advisory Committee |
| CDA | Coeur d'Alene |
| CDC | Centers for Disease Control |
| CERCLA | Comprehensive Environmental Response, Compensation, and Liability Act |
| CERCLIS | Comprehensive Environmental Response, Compensation, and Liability Information System |
| CFR | Code of Federal Regulations |
| cfs | cubic feet per second |
| CIA | Central Impoundment Area |
| CIP | community involvement plan |
| COC | chemical of concern |
| COEC | chemical of environmental concern |
| COPC | chemical of potential concern |
| COPEC | chemical of potential environmental concern |
| CSM | conceptual site model |
| CTP | Central Treatment Plant |
| CUA | common use area |
| CV | coefficient of variation |
| cy | cubic yard |
| DA | depositional area |
| DOI | Department of Interior |
| DOJ | Department of Justice |
| ED20 | effective dose (corresponding to a 20% increase in an adverse effect, relative to the control response) |
| EE/CA | engineering evaluation/cost analysis |
| EPA | Environmental Protection Agency |
| EPC | exposure point concentration |
| ESA | Endangered Species Act |
| ESD | explanation of significant differences |
| FS | feasibility study |
| FSPA | field sampling plan amendment |
| HEPA | high efficiency particulate arresting |
| HHRA | human health risk assessment |
| HI | hazard index |
| HQ | hazard quotient |
| ICP | Institutional Controls Program |
| IDAPA | Idaho Administrative Procedures Act |
| IDEQ | Idaho Department of Environmental Quality |
| IDHW | Idaho Department of Health and Welfare |
| IEUBK | integrated exposure uptake biokinetic model |
| LDR | land disposal restriction |
| LHIP | Lead Health Intervention Program |
| LOAEL | lowest observed adverse effects level |
| LOEC | lowest observed effects concentration |
| MBTA | Migratory Bird Treaty Act |
| MCL | maximum contaminant level |
| MCLG | maximum contaminant level goal |
| μg/L | micrograms per liter |
| μg/dL | micrograms per deciliter |
| μm | micrometer |
| mg/kg | milligrams per kilogram |
| MTCA | Model Toxics Control Act |
| NAAQS | National Ambient Air Quality Standards |
| NAGPRA | Native American Graves Protection and Repatriation Act |
| NCP | National Oil and Hazardous Substances Contingency Plan |
| NHANES | National Health and Nutrition Examination Survey |
| NHPA | National Historic Preservation Act |
| NOAEL | no observed adverse effects level |
| NOEC | no observed effects concentration |
| NPDES | National Pollutant Discharge Elimination System |
| NRD | natural resources damage |
| O&M | operation and maintenance |
| ORCR | Office of Resource Conservation and Recovery |
| OSWER | Office of Solid Waste and Emergency Response |
| OU | operable unit |
| PHD | Panhandle Health District |
| PRG | preliminary remediation goal |
| PRP | potentially responsible party |
| RAO | remedial action objective |
| RBC | risk-based criteria |
| RCRA | Resource Conservation and Recovery Act |
| RfD | reference dose |
| RI | remedial investigation |
| RME | reasonable maximum exposure |
| ROD | Record of Decision |
| ROW | right-of-way |
| SAB | Service Advisory Board |
| SARA | Superfund Amendments and Reauthorization Act |
| SCS | Supplemental Control System |
| SVNRT | Silver Valley Natural Resources Trustees |
| TAG | Technical Assistance Grant |
| TBC | to be considered |
| TCD | typical conceptual design |
| TMDL | total maximum daily load |
| TRV | toxicity reference value |
| TT | treatment technique |
| UCL95 | 95 percent upper confidence level |
| UPRR | Union Pacific Railroad |
| USDA | United States Department of Agriculture |
| USFS | United States Forest Service |
| USFWS | United States Fish and Wildlife Service |
| USGS | United States Geological Survey |
| WAC | Washington Administrative Code |