- Safety and Health Topics
This section highlights OSHA standards, directives (instruction to OSHA staff), letters of interpretation (official letters of interpretation of the standards), and recommended exposure limits related to mercury.
General Industry (29 CFR 1910)
- 1910 Subpart H, Hazardous materials
- 1910 Subpart I, Personal protective equipment
- 1910 Subpart Q, Welding, cutting, and brazing
- 1910 Subpart Z, Toxic and hazardous substances [related topic page]
Shipyard Employment (29 CFR 1915)
- 1915 Subpart I, Personal protective equipment
- 1915 Subpart Z, Toxic and hazardous substances
- 1915.1000, Air contaminants
Construction Industry (29 CFR 1926)
- 1926 Subpart D, Occupational health and environmental controls
- 1926 Subpart E, Personal protective and life saving equipment
- 1926.95, Criteria for personal protective equipment
- 1926 Subpart J, Welding and cutting
- 1926.353, Ventilation and protection in welding, cutting, and heating
- Removal of Obsolete Sections. CPL 02-02-006 [CPL 2-2.6 CH-1], (June 3, 1985). Transmits page changes that remove sections containing policies and procedures superseded by guidelines set forth in the Field Operations Manual (FOM), OSHA Instruction CPL 2.45A.
- Inorganic Mercury and its Compounds. CPL 02-02-006 [CPL 2-2.6], (October 30, 1978). Provides guidelines to be followed in inspection, and where necessary, the issuance of citations, regarding exposure to mercury in the workplace.
Letters of Interpretation
- PEL for inorganic mercury is a time weighted average, not a ceiling.
(September 3, 1996). Addresses the permissible exposure limit (PEL) for mercury.
- Hazard Communication Standard (HCS) Labeling Requirements for Industrial Thermometers.
(July 17, 1989). Discusses the fact that industrial thermometers are expected to break during normal conditions of use, exposing employees to mercury.
- Respiratory Protection for Mercury and Chlorine. (March 1, 1989). Provides
a response concerning respiratory protection for mercury and chlorine.
- Advertisement on cleaning up mercury spills from glass thermometers.
(July 10, 1987). Discusses misleading advertising of mercury thermometers.
- Use of Chemical Cartridge Respirators for Protection Against Mercury Vapor.
(November 15, 1985). Describes the chemical cartridge respirators.
- Interpretation of Allowable Airborne Concentrations of Mercury.
(June 30, 1976). States that the allowable airborne concentration of mercury shall be interpreted as 0.1 mg/m3 as determined on the basis of the full shift time-weighted average.
Recommended Exposure Limits
Includes exposure limit information from OSHA, the National Institute for Occupational Safety and Health (NIOSH), and the American Conference of Industrial Hygienists (ACGIH).
|Mercury, Alkyl Compounds||Mercury, Aryl Compounds||Mercury, Inorganic Compounds|
|8-Hour TWA||0.01 mg/m3, Skin||-||-|
|Ceiling||0.04 mg/m3, Skin||0.1 mg/m3||0.1 mg/m3|
|8-Hour TWA||0.01 mg/m3, Skin||0.05 mg/m3, Skin||0.05 mg/m3, Skin|
|ST/Ceiling||0.03 mg/m3, (ST) Skin||0.1 mg/m3, (Ceiling) Skin||0.1 mg/m3, (Ceiling) Skin|
|IDLH||2 mg/m3||10 mg/m3||10 mg/m3|
|8-Hour TWA||0.01 mg/m3, Skin||0.1 mg/m3, Skin||0.025 mg/m3, Skin|
|Short Term||0.03 mg/m3, Skin||-||-|