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Permissible Exposure Limits (PELs) Establishing PELs Approximately 500 PELs have been established. Existing PELs are contained in 29 CFR 1910.1000, the air contaminants standard. Most PELs are listed in 29 CFR 1910.1000 Table Z-1. 29 CFR 1910.1000 Table Z-2 contains PELs for the following substances:   benzene beryllium and beryllium compounds cadmium – dust and fumes (see 29 CFR 1910.1027) carbon disulfide carbon tetrachloride chromic acid and chromates (see 29 CFR 1910.26 and corrections) ethylene dibromide ethylene dichloride fluoride as dust formaldehyde (see 29 CFR 1910.1048) hydrogen fluoride hydrogen sulfide methylene chloride (see 29 CFR 1910.1052) mercury organo(alkyl)mercury styrene tetrachloroethylene toluene trichloroethylene PELs for exposure to mineral dusts can be found in 29 CFR 1910.1000 Table Z-3. Mineral dusts listed include silica (crystalline and amorphous), silicates, graphite, coal dusts and inert or nuisance dusts. The following references provide additional information regarding establishing PELs. AIHA's Position on Permissible Exposure Limits (PELs). American Industrial Hygiene Association (AIHA), (1998, January 2). AIHA's White Paper on Permissible Exposure Limits (PELs). American Industrial Hygiene Association (AIHA), (1993, January 19). OSHA has not been able to set up-to-date PELs for every chemical of concern in the workplace, these comments suggest what employers and industrial hygienists may do to fill the need.  Safety and  Health Topics     Permissible Exposure Limits (PELs)   OSHA Standards   Establishing PELs   Exposure Evaluation and Control   Additional Information   Credits   Content Reviewed 10/30/2006

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