Abbreviations
| APF | — assigned protection factor |
| CFR | — Code of Federal Regulations |
| DFM | — dust, fume, and mist |
| DHHS | — U.S. Department of Health and Human Services |
| DM | — dust and mist |
| DOP | — dioctyl phthalate |
| HEPA filter | — high-efficiency particulate air filter |
| HR | — hazard ratio |
| IDLH | — immediately dangerous to life and health |
| MMAD | — mass median aerodynamic diameter |
| MSHA | — Mine Safety and Health Administration |
| NaCl | — sodium chloride |
| NIOSH | — National Institute for Occupational Safety and Health |
| OSHA | — Occupational Safety and Health Administration |
| PAPR | — powered air-purifying respirator |
| PEL | — permissible exposure limit |
| REL | — recommended exposure limit |
| SCBA | — self-contained breathing apparatus |
| TB | — tuberculosis |
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