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668 HAZWOPER for General Site Workers IX
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General Safety Practices

Follow these general safety practices below when working in and around excavations:

  • Keep heavy equipment away from trench edges.
Unsafe: Working under heavy equipment. Class C soil.
  • Identify other sources that might affect trench stability.
  • Keep excavated soil (spoils) and other materials at least 2 feet (0.6 meters) from trench edges.
  • Know where underground utilities are located before digging.
  • Test for atmospheric hazards such as low oxygen, hazardous fumes, and toxic gases when greater than 4 feet deep.
  • Do not work under suspended or raised loads and materials.
  • Ensure personnel wear high visibility or other suitable clothing when exposed to vehicular traffic.
  • Do not cross over an excavation unless approved walkways or bridges are provided. Do not use ladders to cross over excavations.
  • Check for the possibility of hazardous atmospheres such as a lack of oxygen or the accumulation of combustible gas concentrations.
  • Do not let standing water accumulate in or around the trench.

Knowledge Check Choose the best answer for the question.

5-6. Construction workers should keep excavated soil (spoils) and other materials at least _____ from trench edges.