Hazardous 1
Inside an active gasoline-dispensing pump.
Inside the main processing room of a grain elevator.
The storage room of a textile mill where baled cotton is kept.
A commercial spray-paint booth where lacquer is actively misted onto furniture parts.
The outdoor area surrounding an open industrial solvent-mixing tank during normal operations.
A warehouse where sealed bags of starch are stored on pallets.
A woodworking shop where sawdust flies freely but settles quickly into piles on the floor.
An industrial wastewater treatment facility's open-air skimming tank where volatile organic compounds (VOCs) occasionally float to the surface.
An indoor storage room where closed drums of liquid propane are stacked, with standard mechanical ventilation.
A facility that pulverizes and shapes lightweight aluminum parts.
A synthetic nylon fiber manufacturing plant floor where airborne lint is constantly generated.
A major hospital's dedicated cylinder storage room where pressurized oxygen tanks are kept chained to the wall.
The space inside a sealed, underground utility vault where a natural gas pipeline runs through seamless welded pipe.
A commercial bakery's mixing room, directly adjacent to an open flour sifting station.
A facility that processes combustible carbon black dust, completely enclosed in normal operations but susceptible to leaks.
An agricultural fertilizer blending plant where ammonium nitrate dust is mixed and bagged.
A poorly ventilated sewer wet well where domestic waste naturally generates methane gas continuously.
A cleanroom where carbon fiber composites are cut, creating fine, conductive graphite dust in the air during shifts.
An aircraft hangar floor area within three feet of an aircraft's fully enclosed, sealed fuel tank system.
A closed medical laboratory cleanroom where small, sealed vials of flammable ether are stored in an unventilated cabinet.