| Acronym | Meaning |
| EPS | Emission Preprocessor System |
| NESHAP | National Emission Standards For Hazardous Air Pollutants |
| TPE | Thermoplastic Polyester Elastomer |
| RNS | Reactive Nitrogen Species |
| TRI | Toxic Release Inventory |
| EGRIS | Emissive Gamma-ray Imaging And Spectroscopy |
| EIIP | Emission Inventory Improvement Program |
| LLS | Linear-least Squares |
| QCR | Quartz Crystal Resonator |
| NWSIA | National Water Supply Improvement Association |