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814 Heavy Equipment Safety
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Silica, Nuisance Dust, Dried Mud, or Silt

N95 respirators are a type of personal protective equipment (PPE) designed to provide a high level of protection against airborne particles, including dust.

NIOSH N95 Facepiece
N-95 dust masks

Use the following personal protective equipment as necessary:

  • At a minimum, use respirators with N, R, or P95 filters for work with crystalline silica-containing materials (e.g., concrete, brick, tile, mortar). The use of N, R, or P100 filters may provide additional protection. Higher levels of respiratory protection may be needed for some operations (e.g., cutting concrete, sandblasting, mixing concrete).
  • N, R, or P95 respirators may be used for nuisance dusts (e.g., dried mud, dirt, or silt) and mold (except mold remediation). Filters with a charcoal layer may be used for odors.

Knowledge Check Choose the best answer for the question.

3-5. At a minimum, what type of filters should you use for work with crystalline silica-containing materials?