| Cleaners and health care workers |
chloride, ammonia, disinfectants, hydrochloric acid, organic solvents |
| Aluminum smelting |
fluorides, sulfur dioxide, aluminum oxide |
| Pulp and paper mills |
sulfur dioxide |
| Swine and dairy production |
aerosols from endotoxins and organic dusts; manure gases |
| Dark-room environment |
acetic acid |
| Welding |
nitrogen oxides, fluorides, ozone, metals |
| Biocides |
ethylene oxide, formalin, insecticides (organophosphates, organochlorines, and carbamates) |
| Construction work |
spray paints, cement dust, calcium oxide (lime), floor sealant (aromatic hydrocarbons) |
| Firefighters, first responders, security agents |
smoke (fires), fumes released by chemical spills |
| Mechanics, highway workers, and railroad workers |
diesel exhaust, organic solvents |
