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# Standard Interpretations
1 2014 - 02/21/2014 - Field extraction procedure for isocyanate air samples
2 2012 - 01/18/2012 - PEL for cotton dust when exposure is from cotton fibers used in the manufacture of absorbent glass tubes.
3 2011 - 12/20/2011 - Clarification on the applicability of the Hazard Communication standard DEF tank operations.
4 2011 - 11/08/2011 - Use of IOM sampler for inhalable dust.
5 2010 - 01/25/2010 - OSHA requirements for mercury response and clean-up personnel in a number of different site-specific scenarios.
6 2009 - 05/19/2009 - Application of OSHA PEL for nitric oxide as 8-hr TWA to pregnant employees.
7 2008 - 09/16/2008 - OSHA's position on employer performing additional air monitoring that exceeds OSHA requirements.
8 2007 - 12/26/2007 - Clarification of requirements for storage and use of flammable and/or combustible liquids.
9 2007 - 03/22/2007 - Explanation of OSHA's determination of the PEL for amorphous silica.
10 2005 - 04/04/2005 - Potential health hazards from exposures to ammonia and EMF radiation from hair dryers for beauty salon workers.
11 2003 - 06/05/2003 - Employer's responsibility to protect employees from workplace hazards through appropriate hazard control methods.
12 2003 - 02/24/2003 - Reiteration of Existing OSHA Policy on Indoor Air Quality: Office Temperature/Humidity and Environmental Tobacco Smoke.
13 2003 - 01/24/2003 - Enforcement Policy for Respiratory Hazards Not Covered by OSHA Permissible Exposure Limits.
14 2003 - 01/24/2003 - Use of occupational exposure levels (OELs) for substances not covered by an OSHA Permissible Exposure Limit (PEL).
15 2002 - 08/08/2002 - Applicable OSHA standards and safety considerations for microwave device use in a laboratory.
16 2002 - 06/24/2002 - Hierarchy of controls for exposure to air contaminants.
17 2001 - 10/22/2001 - Clarification of minimum face velocity requirements for spray booths.
18 1999 - 04/01/1999 - Appropriate air sampling methods for copper and zinc oxide.
19 1998 - 11/13/1998 - Exposure limits and symptoms of Hydroquinone, acetic acid, and glutaraldehyde exposure.
20 1998 - 10/26/1998 - Worker exposure to tobacco smoke.
21 1997 - 05/15/1997 - OSHA's regulations for chemicals used in the workplace, and in particular, glutaraldehyde.
22 1997 - 05/15/1997 - Permissible Exposure Limits for Nuisance dust.
23 1996 - 08/20/1996 - Railroad workers and their exposure to crystalline silica.
24 1996 - 05/15/1996 - Variance exposure level for silver metal.
25 1995 - 10/06/1995 - 8-hour total weight average (TWA) permissible exposure limit (PEL).
26 1995 - 09/28/1995 - The appropriate method for assessing hydrogen sulfide peak exposure levels.
27 1995 - 05/01/1995 - An error in the 1910.1000 Z-Tables.
28 1995 - 03/22/1995 - Request for a list of all OSHA-regulated air contaminants.
29 1994 - 09/29/1994 - Occupational Safety and Health Administration's (OSHA) regulations for ozone.
30 1994 - 04/27/1994 - Occupational health hazards to veterinarians.
31 1993 - 08/05/1993 - Compliance and Enforcement Activities affected by the PELs Decision.
32 1993 - 04/22/1993 - Wood dust sampling.
33 1993 - 03/11/1993 - Exposures to polychlorinated biphenyls (PCB's) in lighting equipment.
34 1992 - 07/28/1992 - Spray painting relating to vehicle maintenance operations.
35 1991 - 05/10/1991 - Regulations For Cotton Waste Operations.
36 1991 - 04/08/1991 - Enforcement of the Chromate and Chromic Acid PEL
37 1990 - 06/13/1990 - Ventilation for an anhydrous ammonia refrigeration system.
38 1989 - 06/06/1989 - Regulating employee exposure to wood dust.
39 1989 - 02/21/1989 - Metal cyclones Supplied by SKC Inc. are not to be used for sampling respirable dust.
40 1989 - 02/21/1989 - Request for a regulatory clarification concerning commercial carbon black.
41 1988 - 03/29/1988 - Response to Freedom of Information Act request for standards and guidelines related to working around aircraft.
42 1988 - 03/03/1988 - Inquiry on monitoring device for cigarette smoke in buildings.
43 1988 - 02/25/1988 - Response to a request for information concerning the OSHA standard for carbon monoxide.
44 1988 - 02/11/1988 - Information on the health hazard of ozone produced by common office copiers and on radon gas testing devices.
45 1987 - 07/10/1987 - Advertisement on cleaning up mercury spills from glass thermometers.
46 1986 - 04/07/1986 - Benzo(a)pyrene regulated with coal tar pitch volatiles.; Response to request for information on benzo(a)pyrene.
47 1986 - 01/17/1986 - Standard for exposure to tetrahydrofuran; Respirators may be worn only if engineering and administrative controls are not feasible.
48 1985 - 11/08/1985 - Hazardous components of diesel engine emissions.
49 1985 - 06/21/1985 - OSHA standards do not include surface contamination criteria or quantifications for skin absorption.
50 1985 - 06/03/1985 - General overview of safe handling of arsenic containing compounds.
51 1984 - 10/10/1984 - Information on hazards of dry photocopiers
52 1983 - 10/04/1983 - Nuisance dust standard applies to grain dust exposures.
53 1983 - 05/31/1983 - Hazardous exposures to pesticides may be cited under the general duty clause.
54 1983 - 04/08/1983 - Petroleum asphalt removed from coverage under the Coal Tar Pitch Volatiles Standard.
55 1983 - 01/24/1983 - Status and applicability of Thiram standards in Washington and Oregon.
56 1976 - 06/30/1976 - Allowable Airborne Concentrations of Mercury.

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