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Now Accepting Public Comments

The Occupational Safety and Health Administration (OSHA) is seeking public comment on its draft Weight of Evidence guidance document (OSHA-2016-0004).
The comment period closed on May 2, 2016

Guidance on Data Evaluation for Weight of Evidence Determination

The draft document is intended to help employers consider all available information in relation to the classification of a hazard. The approach, known as "weight of evidence (WoE)" assists manufacturers, importers and employers to evaluate scientific studies on the potential health hazards of a chemical and determine what information must be disclosed on the label and safety data sheet for compliance with the Hazard Communication Standard (HCS). The draft complements a recently posted hazard classification document [8 MB PDF*, 432 pages].

This guidance document is not a standard or regulation, and it creates no new legal obligations. It contains recommendations as well as descriptions of mandatory safety and health standards. The recommendations are advisory in nature, informational in content, and are intended to assist employers in providing a safe and healthful workplace. The Occupational Safety and Health Act requires employers to comply with safety and health standards and regulations promulgated by OSHA or by a state with an OSHA-approved state plan. In addition, the Act’s General Duty Clause, Section 5(a)(1), requires employers to provide their employees with a workplace free from recognized hazards likely to cause death or serious physical harm.


*Accessibility Assistance: Contact OSHA's Directorate of Standards and Guidance at (202) 693-1950 for assistance accessing PDF materials.

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