| Acronym | Meaning |
| IFAS | Integrated Fixed-film Activated Sludge |
| ELI | Extra Low Interstitial |
| CEIS | Center For Environmental Information And Statistics (EPA) |
| MEP | Multiple Extraction Procedure |
| IMCL | Intramyocellular Lipid |
| LTTS | Low-Temperature Thermal Separation (for Waste Soil Treatment) |
| AQAM | Air Quality Assessment Model |
| ERCS | Elastic Recoil Coincidence Spectroscopy |
| LNA | Locked Nucleic Acid |
| EDD | Enforcement Decision Document |