| Acronym | Meaning |
| GLERL | Great Lakes Environmental Research Laboratory |
| SCCF | Spin-correlated Crystal Field |
| IIRS | Ion Impact Radiation Spectroscopy |
| MSM | Multiple-scattering Model |
| AOS | Alpha Olefin Sulfonate (surfactant) |
| PSES | Pretreatment Standards For Existing Sources |
| CHFEP | Coreless Hartree-Fock Effective Potential |
| BID | Background Information Document |
| RHF SP | Restricted Hartree Fock Spin Polarization |
| GCECD | Gas Chromatography Electron Capture Detector |