Safety

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Across
  1. 4. incidental grounding of a conducting electrical wire
  2. 5. powered by air pressure
  3. 7. narrow excavation made below ground surface
  4. 10. unplanned event that does results in injury
  5. 12. capable of easily igniting and rapidly burning
  6. 13. devices that provide clean, filtered breathing air
Down
  1. 1. a support system designed to prevent a trench cave in
  2. 2. powered by fluid under pressure
  3. 3. unplanned event that does not result in injury
  4. 6. elevated platforms for workers and material
  5. 8. hazardous chemicals on job sites
  6. 9. safety data sheets
  7. 11. personal protective equipment