NEW - OH Part 301 Air Contaminants in GI; OH Part 601 Air Contaminants in CS; OH Part 590 Silica in GI; and OH Part 690 Silica in CS were amended, effective March 1, 2017

NEW Amendments – the following four standards are effective March 1, 2017

  • Occupational Health Standard Part 301 Air Contaminants for General Industry

  • Occupational Health Standard Part 590 Silica in General Industry

  • Occupational Health Standard Part 601 Air Contaminants for Construction

  • Occupational Health Standard Part 690 Silica in Construction

OH Part 301 and OH Part 601 gives direction to employers and employees on protecting Michigan employees from health and safety hazards in the workplace when using air contaminants.

OH Part 590 and OH Part 690 gives direction to employers and employees on protecting Michigan employees from health and safety hazards in the workplace when using silica.

OSHA created 1910.1053 Respirable crystalline silica, therefore we created a new standard, Occupational Health Standard Part 590 Silica in General Industry to regulate silica in general industry work.  OH Part 590 adopts the federal rules by reference.

OSHA created 1926.1153 Respirable crystalline silica, therefore we created a new standard, Occupational Health Standard Part 690 Silica in Construction to regulate silica in construction work.  OH Part 690 adopts the federal rules by reference.

OSHA amended 1910.1000 Gases, vapors, fumes, dusts, and mists, to revise Silica to match the new 1910.1053 Respirable crystalline silica standard.  Therefore, MIOSHA has revised OH Part 301 to match the changes that OSHA made.  In addition, minor editorial and formatting changes were made.

OSHA amended 1926.55 Gases, vapors, fumes, dusts, and mists, to revise Silica to match the new 1926.1153 Respirable crystalline silica standard.  Therefore, MIOSHA has revised OH Part 601 to match the changes that OSHA made.  In addition, minor editorial and formatting changes were made.

A copy of the new standards are available on the MIOSHA Standards website and here:

A copy of the strike-bold drafts are available here: