| Acronym | Meaning |
| LRTBAP | Long-range Trans-boundary Air Pollution |
| SERS | Surface Enhanced Raman Spectroscopy |
| IRGL | Interagency Regulatory Liaison Group |
| RT | Reverse Transcriptase |
| RQDO | Relativistic Quantum Defect Orbital (method In Calcns. Of Oscillator Strengths) |
| UASBR | Upflow Anaerobic Sludge Blanket Reactor |
| CEARC | Canadian Environmental Assessment Research Council |
| SWSA | Solid Waste Storage Area |
| LIESA | Laser Induced Emission Spectral Analysis |
| LT2ESWTR | Long-Term 2 Enhanced Surface Water Treatment Rule [of US EPA] |