Question

additional chemical hazards training must be provided to employees: annually when new hazards are introduced into the workplace when there is an exposure to hazardous chemicals every three years

Explanation:

Additional chemical hazards training is crucial when new workplace hazards emerge to keep employees informed and safe. Annual or tri - annual schedules may not account for sudden changes. Exposure to hazardous chemicals may not always be a clear signal for new training as prevention and awareness before exposure are important. So training when new hazards are introduced is key.

Answer:

When new hazards are introduced into the workplace