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Direct-Reading Instruments

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OSHA Standards

State Standards

There are twenty-eight OSHA-approved State Plans, operating state-wide occupational safety and health programs. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements.

This section highlights OSHA standards, letters of interpretation (official letters of interpretation of the standards), and other resources related to direct-reading instruments in the workplace.

General Industry (29 CFR 1910)

  • 1910 Subpart H, Hazardous materials
    • 1910.120, Hazardous waste operations and emergency response. Direct-reading instruments are an important element of the monitoring program outlined by this standard. [related topic page]
  • 1910 Subpart J, General environmental controls
    • 1910.146, Permit-required confined spaces. Confined spaces must be tested before entry with a direct-reading instrument for oxygen content, flammable gases and vapors, and toxic contaminants. [related topic page]
  • 1910 Subpart R, Special industries
    • 1910.269, Electric power generation, transmission, and distribution. Direct-reading instruments are required to test for oxygen-deficient atmospheres and flammable gases and vapors. [related topic page]
    • 1910.272, Grain handling facilities. Requires that the atmospheres of bins, silos, and tanks are tested before entry. [related topic page]
      • Appendix A, Grain handling facilities. It specifically states that direct-reading instruments should be used to periodically monitor atmospheres in bins, silos, and tanks.

Shipyard Employment (29 CFR 1915)

  • 1915 Subpart B, Confined and enclosed spaces and other dangerous atmospheres
    • 1915.12, Precautions and the order of testing before entering confined and enclosed spaces and other dangerous atmospheres. Includes similar requirements to 29 CFR 1910.146.

Construction Industry (29 CFR 1926)

  • 1926 Subpart D, Occupational health and environmental controls
    • 1926.65, Hazardous waste operations and emergency response. Contains requirements identical to 29 CFR 1910.120 regarding direct-reading instruments used in construction.
Letters of Interpretation
Other Resources
State Standards

There are twenty-eight OSHA-approved State Plans, operating state-wide occupational safety and health programs. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements.

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