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Air Contaminants
National Summary

This topic covers air contaminants, including mold, fiberglass, carbon monoxide, radon, and many other substances that have a Permissible Exposure Limit (PEL).

Employers whose workers are exposed to air contaminants must comply with PELs, ceiling limits, and 8-hour time-weighted averages for the relevant substance. Regulated air contaminants are listed in three tables in 29 CFR 1910 Subpart Z.

For related resources and training materials, refer to the following topics:

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Directives 10/07/1991 - L 2-2.52 CH-1 - Page Changes to OSHA Instruction CPL 2-2.52 07/22/2003National
Directives 10/16/1980 - STD 1-5.16 - Venting LP-Gas to the Atmosphere 07/16/2003National
Regulations 29 CFR § 1910.1000 Air contaminants  National
Regulations 29 CFR § 1910.19 Special provisions for air contaminants  National
Safety Slogans Air Contaminants  National
Interpretations Air monitoring results, citations, and employee exposure records.[1910.1020(e)(1)(i); 1910.1020(c)(5); 1910.1020(c)(6); 1910.1020(g)(1)] 03/27/2002National
Interpretations Appropriate air sampling methods for copper and zinc oxide. 04/01/1999National
Questions & Answers Are we required to operate fans while running an injection molding machine if the SDS for the plastic does not mention noticeable health hazards or a PEL? 12/09/2020National
Checklists Best Practices Checklist for Maintaining HVAC Equipment and Indoor Air Quality  National
Interpretations Calculation methods used under the air contaminants standard for extended work shifts. 01/23/1997National
Case Studies Can a Worker Sue His Employer for Exposure to Mold?  National
Puzzles Carbon Monoxide (PDF)  National
Training Tips Carbon Monoxide Can Be a Killer  National
Handouts Carbon Monoxide Exposure (PDF)  National
Quizzes Carbon Monoxide Exposure (PDF)  National
Guidance Documents Carbon Monoxide Fact Sheet  National
Interpretations Carbon Monoxide or High Temperature Alarm Requirement for Portable Breathing Air Compressors. 07/05/1994National
Interpretations Compliance with NFPA 30-2000 ventilation requirements is considered a deminimus violation. 08/27/2001National
Interpretations Correct placement of air sampling cassettes on abrasive blasters. 01/04/1999National
Interpretations Correct placement of air sampling cassettes on employees performing welding operations. 02/03/1999National
Toolbox Talks Dangers of Carbon Monoxide  National
Employee News Articles Dangers of carbon monoxide  National
Interpretations Determination of airborne concentrations of methylene chloride; protection of employees covered by 1910.1052.[1910.1052; 1910.1052(k); 1910.1200] 05/12/2003National
Interpretations Employees in a cotton yarn manufacturing plant who voluntarily wear cloth over their mouths and noses to prevent lint from sticking to their skin.[1910.134] 03/09/1995National
Guidance Documents Ethylene Oxide Fact Sheet  National
Interpretations Exposure monitoring requirements under the coke oven emissions standard. 12/07/1999National
Interpretations Exposures to polychlorinated biphenyls (PCB's) in lighting equipment.[1910.1000] 03/11/1993National
Guidance Documents Formaldehyde Fact Sheet  National
Cartoons Fracking hazards  National
Guidance Documents Guidelines for the Protection and Training of Workers Engaged in Maintenance and Remediation Work Associated with Mold  National
Interpretations Hierarchy of controls for exposure to air contaminants.[1910.1000; 1910.107(d)(9)] 06/24/2002National
Training Tips Is the Air In Your Workplace Safe to Breathe?  National
Questions & Answers Is there a way to make compressed air safe for workers to clean off fiber glass strands with? 10/09/2019National
7 Minute Safety Trainer Mold  National
Handouts Mold  National
Quizzes Mold  National
Handouts Mold [7-Minute Safety Trainer] - Spanish  National
Quizzes Mold [7-Minute Safety Trainer] - Spanish  National
Guidance Documents Mold [OSHA Fact Sheet]  National
Questions & Answers Mold and aspergillus allergies 04/25/2017National
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