| Acronym | Meaning |
| AU | Absorbance Units |
| IFD | Industrial Facilities Discharge File (file Within STORET) |
| AIPI | Ab Initio Perturbed Ion (calcn. Method) |
| WSD | Water Saturation Deficit |
| FAM | Friable Asbestos-containing Material |
| OFA | Oil Fly Ash |
| NFP | Neurofilament Protein |
| SOD | Sediment Oxygen Demand |
| PSOM | Pseudostate Optical Model |
| LCGTO-MCP-LS | Linear Combination Of Gaussian-type Orbitals-model Core Potential-local Spin Density |