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Exposure Limits
National Summary
This section covers the OSHA general industry standards for permissible exposure limits (PELs) to airborne hazardous substances, including excessive noise, that determine how long a worker may be exposed in the workplace to a threshold amount of a substance or noise without adverse effects on health. The standards are predominantly concerned with inhalation and skin absorption hazards. Specifically, the section covers PELs for general air contaminants and PELs and action levels for carcinogens, and it briefly discusses hazardous chemicals in laboratories.
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TypeTitleDateState
Guidance Documents Criteria for a Recommended Standard – Occupational Exposure to Respirable Coal Mine Dust,  National
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Guidance Documents Crystalline Silica Exposure Card for Construction (Spanish version)  National
Guidance Documents Crystalline Silica Exposure Card for General Industry  National
Guidance Documents Crystalline Silica Exposure Card for General Industry (Spanish version)  National
Guidance Documents Ethical Requirements for Human Observational Exposure Studies Conducted and Supported by EPA  National
Questions & Answers How does OSHA set exposure limits? 04/18/2005National
Forms Limits for Air Contaminants Tables and Recommended PEL Standards Form  National
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Handout Metalworking Fluids  National
Training Exercises Metalworking Fluids  National
Training Exercises Metalworking Fluids  National
Speaker's Notes Metalworking Fluids  National
Trainer's Guides Metalworking Fluids  National
Guidance Documents NIOSH Recommendations for Limiting Potential Exposures of Workers to Asbestos Associated with Vermiculite from Libby, Montana, DHHS (NIOSH) Publication No. 2003-141  National
Guidance Documents NIOSH’s Approaches to Safe Nanotechnology  National
Notices Notice of Availability of the External Review Draft of Framework for Human Health Risk Assessment To Inform Decision Making 07/30/2012National
Notices Notification of a Public Teleconference of the Science Advisory Board; Exposure and Human Health Committee 08/28/2012National
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Regulatory Analysis Permissible Exposure Limits  National
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Notices Toxicological Review of Inorganic Arsenic (Cancer and Noncancer Effects): In Support of Summary Information on the Integrated Risk Information System (IRIS) 12/06/2012National
Notices Updates to Protective Action Guides Manual: Protective Action Guides and Planning Guidance for Radiological Incidents 07/15/2013National
Questions & Answers What is considered a safe level (ppm) of carbon dioxide in a room for children to breathe for an 8 hour day? 08/04/2010National
PowerPoints Working Safely with Metalworking Fluids  National
Audio Presentations Working Safely with Metalworking Fluids  National