Subpart A General

Subpart B General Interpretations

Subpart C General Safety and Health Provisions

Subpart D Occupational Health and Environmental Controls

Subpart E Personal Protective and Life Saving Equipment

Subpart F Fire Protection and Prevention

Subpart G Signs, Signals, and Barricades

Subpart H Materials Handling, Storage, Use, and Disposal

Subpart I Tools - Hand and Power

Subpart J Welding and Cutting

Subpart K Electrical

Subpart L Scaffolds

Subpart M Fall Protection

Subpart N Helicopters, Hoists, Elevators, and Conveyors

Subpart O Motor Vehicles, Mechanized Equipment, and Marine Operations

Subpart P Excavations

Subpart Q Concrete and Masonry Construction

Subpart R Steel Erection

Subpart S Underground Construction, Caissons, Cofferdams, and Compressed Air

Subpart T Demolition

Subpart U Blasting and the Use of Explosives

Subpart V Electric Power Transmission and Distribution

Subpart W Rollover Protective Structures; Overhead Protection

Subpart X Stairways and Ladders

Subpart Y Commercial Diving Operations

Subpart Z Toxic and Hazardous Substances

Subpart AA Confined Spaces in Construction

Subpart BB [Reserved]

Subpart CC Cranes & Derricks in Construction

Authority: 40 U.S.C. 3704; 29 U.S.C. 653, 655, 657; Secretary of Labor's Order No. 12-71 (36 FR 8754), 8-76 (41 FR 25059), 9-83 (48 FR 35736), 1-90 (55 FR 9033), 6-96 (62 FR 111), 3-2000 (65 FR 50017), 5-2002 (67 FR 65008), 5-2007 (72 FR 31160), 4-2010 (75 FR 55355), or 1-2012 (77 FR 3912); 29 CFR part 1911; and 5 U.S.C. 553, as applicable.

Section 1926.61 also issued under 49 U.S.C. 5101 et seq.

Section 1926.62 also issued under 42 U.S.C. 4853

Section 1926.65 also issued under 126 of Public Law 99-499, 100 Stat. 1613.

[55 FR 50687, Dec. 10, 1990; 57 FR 49272, Oct. 30, 1992; 58 FR 26627, May 4, 1993; 58 FR 34218, June 24, 1993; 58 FR 35310, June 30, 1993; 59 FR 6170, Feb. 9, 1994; 59 FR 17479, April 13, 1994; 59 FR 36695, July 19, 1994; 59 FR 43268, Aug. 22, 1994; 59 FR 65947, Dec. 22, 1994; 61 FR 9227, March 7, 1996; 61 FR 31427, June 20, 1996; 62 FR 1493, Jan. 10, 1997; 63 FR 1152, Jan. 8, 1998; 63 FR 33450, June 18, 1998; 70 FR 1143, Jan. 5, 2005; 71 FR 16674, April 3, 2006; 71 FR 50191, August 24, 2006; 73 FR 75588, Dec. 12, 2008; 76 FR 33611, June 8, 2011; 76 FR 80740, Dec. 27, 2011; 77 FR 17889, March 26, 2012; 78 FR 9315, Feb. 8, 2013; 81 FR 16875, March 25, 2016; 81 FR 60273, September 1, 2016; 82 FR 2750, Jan. 9, 2017]
The employer shall ensure the availability of medical personnel for advice and consultation on matters of occupational health.
Provisions shall be made prior to commencement of the project for prompt medical attention in case of serious injury.
In the absence of an infirmary, clinic, hospital, or physician, that is reasonably accessible in terms of time and distance to the worksite, which is available for the treatment of injured employees, a person who has a valid certificate in first-aid training from the U.S. Bureau of Mines, the American Red Cross, or equivalent training that can be verified by documentary evidence, shall be available at the worksite to render first aid.
-
First aid supplies shall be easily accessible when required.
The contents of the first aid kit shall be placed in a weatherproof container with individual sealed packages for each type of item, and shall be checked by the employer before being sent out on each job and at least weekly on each job to ensure that the expended items are replaced.
Proper equipment for prompt transportation of the injured person to a physician or hospital, or a communication system for contacting necessary ambulance service, shall be provided.
In areas where 911 is not available, the telephone numbers of the physicians, hospitals, or ambulances shall be conspicuously posted.
Where the eyes or body of any person may be exposed to injurious corrosive materials, suitable facilities for quick drenching or flushing of the eyes and body shall be provided within the work area for immediate emergency use.

[44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979, as amended at 49 FR 18295, Apr. 30, 1984; 58 FR 35084, June 30, 1993; 61 FR 5507, Feb. 13, 1996; 63 FR 33450, June 18, 1998]
Appendix A to § 1926.50 -- First aid Kits (Non-Mandatory)

First aid supplies are required to be easily accessible under paragraph Sec. 1926.50(d)(1). An example of the minimal contents of a generic first aid kit is described in American National Standard (ANSI) Z308.1-1978 "Minimum Requirements for Industrial Unit-Type First-aid Kits". The contents of the kit listed in the ANSI standard should be adequate for small work sites. When larger operations or multiple operations are being conducted at the same location, employers should determine the need for additional first aid kits at the worksite, additional types of first aid equipment and supplies and additional quantities and types of supplies and equipment in the first aid kits.

In a similar fashion, employers who have unique or changing first-aid needs in their workplace may need to enhance their first-aid kits. The employer can use the OSHA 300 log, OSHA 301 log, or other reports to identify these unique problems. Consultation from the local fire/rescue department, appropriate medical professional, or local emergency room may be helpful to employers in these circumstances. By assessing the specific needs of their workplace, employers can ensure that reasonably anticipated supplies are available. Employers should assess the specific needs of their worksite periodically and augment the first aid kit appropriately.

If it is reasonably anticipated employees will be exposed to blood or other potentially infectious materials while using first-aid supplies, employers should provide personal protective equipment (PPE). Appropriate PPE includes gloves, gowns, face shields, masks and eye protection (see "Occupational Exposure to Blood borne Pathogens", 29 CFR 1910.1030(d)(3)) (56 FR 64175).

[63 FR 33450, June 18, 1998; 76 FR 80740, Dec. 27, 2011]
An adequate supply of potable water shall be provided in all places of employment.
Portable containers used to dispense drinking water shall be capable of being tightly closed, and equipped with a tap. Water shall not be dipped from containers.
Any container used to distribute drinking water shall be clearly marked as to the nature of its contents and not used for any other purpose.
The common drinking cup is prohibited.
Where single service cups (to be used but once) are supplied, both a sanitary container for the unused cups and a receptacle for disposing of the used cups shall be provided.
Potable water means water that meets the standards for drinking purposes of the State or local authority having jurisdiction, or water that meets the quality standards prescribed by the U.S. Environmental Protection Agency's National Primary Drinking Water Regulations (40 CFR part 141).
Outlets for nonpotable water, such as water for industrial or firefighting purposes only, shall be identified by signs meeting the requirements of Subpart G of this part, to indicate clearly that the water is unsafe and is not to be used for drinking, washing, or cooking purposes.
There shall be no cross-connection, open or potential, between a system furnishing potable water and a system furnishing nonpotable water.
Toilets shall be provided for employees according to the following table:

Table D-1
Number of
employees
Minimum number of facilities
20 or less 1
20 or more 1 toilet seat and 1 urinal per 40 workers.
200 or more 1 toilet seat and 1 urinal per 50 workers.
Under temporary field conditions, provisions shall be made to assure not less than one toilet facility is available.
Job sites, not provided with a sanitary sewer, shall be provided with one of the following toilet facilities unless prohibited by local codes:
Privies (where their use will not contaminate ground or surface water);
Chemical toilets;
Recirculating toilets;
Combustion toilets.
The requirements of this paragraph (c) for sanitation facilities shall not apply to mobile crews having transportation readily available to nearby toilet facilities.
All employees' food service facilities and operations shall meet the applicable laws, ordinances, and regulations of the jurisdictions in which they are located.
All employee food service facilities and operations shall be carried out in accordance with sound hygienic principles. In all places of employment where all or part of the food service is provided, the food dispensed shall be wholesome, free from spoilage, and shall be processed, prepared, handled, and stored in such a manner as to be protected against contamination.
When temporary sleeping quarters are provided, they shall be heated, ventilated, and lighted.
The employer shall provide adequate washing facilities for employees engaged in the application of paints, coating, herbicides, or insecticides, or in other operations where contaminants may be harmful to the employees. Such facilities shall be in near proximity to the worksite and shall be so equipped as to enable employees to remove such substances.
Washing facilities shall be maintained in a sanitary condition.
Lavatories shall be made available in all places of employment. The requirements of this subdivision do not apply to mobile crews or to normally unattended work locations if employees working at these locations have transportation readily available to nearby washing facilities which meet the other requirements of this paragraph.
Each lavatory shall be provided with hot and cold running water, or tepid running water.
Hand soap or similar cleansing agents shall be provided.
Individual hand towels or sections thereof, of cloth or paper, air blowers or clean individual sections of continuous cloth toweling, convenient to the lavatories, shall be provided.
Whenever showers are required by a particular standard, the showers shall be provided in accordance with paragraphs (f)(4)(ii) through (v) of this section.
One shower shall be provided for each 10 employees of each sex, or numerical fraction thereof, who are required to shower during the same shift.
Body soap or other appropriate cleansing agents convenient to the showers shall be provided as specified in paragraph (f)(3)(iii) of this section.
Showers shall be provided with hot and cold water feeding a common discharge line.
Employees who use showers shall be provided with individual clean towels.
No employee shall be allowed to consume food or beverages in a toilet room nor in any area exposed to a toxic material.
Every enclosed workplace shall be so constructed, equipped, and maintained, so far as reasonably practicable, as to prevent the entrance or harborage of rodents, insects, and other vermin. A continuing and effective extermination program shall be instituted where their presence is detected.
Whenever employees are required by a particular standard to wear protective clothing because of the possibility of contamination with toxic materials, change rooms equipped with storage facilities for street clothes and separate storage facilities for the protective clothing shall be provided.

[44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979, as amended at 58 FR 35084; June 30, 1993; 76 FR 33611, June 8, 2011]
Protection against the effects of noise exposure shall be provided when the sound levels exceed those shown in Table D-2 of this section when measured on the A-scale of a standard sound level meter at slow response.
When employees are subjected to sound levels exceeding those listed in Table D-2 of this section, feasible administrative or engineering controls shall be utilized. If such controls fail to reduce sound levels within the levels of the table, personal protective equipment as required in Subpart E, shall be provided and used to reduce sound levels within the levels of the table.
If the variations in noise level involve maxima at intervals of 1 second or less, it is to be considered continuous.
-
In all cases where the sound levels exceed the values shown herein, a continuing, effective hearing conservation program shall be administered.

TABLE D-2 - PERMISSIBLE NOISE EXPOSURES
Duration per day,
hours
Sound level dBA
slow response
8 90
6 92
4 95
3 97
2 100
112 102
1 105
12 110
14 or less 115
When the daily noise exposure is composed of two or more periods of noise exposure of different levels, their combined effect should be considered, rather than the individual effect of each. Exposure to different levels for various periods of time shall be computed according to the formula set forth in paragraph (d)(2)(ii) of this section.
Fe = (T1/L1) (T2/L2) · · · (Tn/Ln)
where:

Fe = The equivalent noise exposure factor.
T = The period of noise exposure at any essentially constant level.
L = The duration of the permissible noise exposure at the constant level (from Table D-2).


If the value of Fe exceeds unity (1) the exposure exceeds permissible levels.
A sample computation showing an application of the formula in paragraph (d)(2)(ii) of this section is as follows. An employee is exposed at these levels for these periods:

110 db A 14 hour.
100 db A 12 hour.
90 db A 112 hours.

Fe = (14 divided by 12)+(12 divided by 2)+(112 divided by 8)
Fe = 0.500+0.25+0.188
Fe = 0.938


Since the value of Fe does not exceed unity, the exposure is within permissible limits.
Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level.
In construction and related activities involving the use of sources of ionizing radiation, the pertinent provisions of the Nuclear Regulatory Commission Standards for Protection Against Radiation (10 CFR Part 20), relating to protection against occupational radiation exposure, shall apply.
Any activity which involves the use of radioactive materials or X-rays, whether or not under license from the Nuclear Regulatory Commission, shall be performed by competent persons specially trained in the proper and safe operation of such equipment. In the case of materials used under Commission license, only persons actually licensed, or competent persons under direction and supervision of the licensee, shall perform such work.
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]
[Reserved]

Note: The requirements applicable to construction work under paragraphs (c) through (r) of this section are identical to those set forth at paragraphs (a) through (p) of 1910.1096 of this chapter.

[44 FR 8577, Feb. 9, 1979; 44 FR 20940, Apr. 6, 1979, as amended at 58 FR 35084 & 35310; June 30, 1993; 61 FR 5507, Feb. 13, 1996; 61 FR 31427, June 20, 1996]
Only qualified and trained employees shall be assigned to install, adjust, and operate laser equipment.
Proof of qualification of the laser equipment operator shall be available and in possession of the operator at all times.
Employees, when working in areas in which a potential exposure to direct or reflected laser light greater than 0.005 watts (5 milliwatts) exists, shall be provided with antilaser eye protection devices as specified in Subpart E of this part.
Areas in which lasers are used shall be posted with standard laser warning placards.
Beam shutters or caps shall be utilized, or the laser turned off, when laser transmission is not actually required. When the laser is left unattended for a substantial period of time, such as during lunch hour, overnight, or at change of shifts, the laser shall be turned off.
Only mechanical or electronic means shall be used as a detector for guiding the internal alignment of the laser.
The laser beam shall not be directed at employees.
When it is raining or snowing, or when there is dust or fog in the air, the operation of laser systems shall be prohibited where practicable; in any event, employees shall be kept out of range of the area of source and target during such weather conditions.
Laser equipment shall bear a label to indicate maximum output.
Employees shall not be exposed to light intensities above:
Direct staring: 1 micro-watt per square centimeter;
Incidental observing: 1 milliwatt per square centimeter;
Diffused reflected light: 2 ½ watts per square centimeter.
Laser unit in operation should be set up above the heads of the employees, when possible.
Employees shall not be exposed to microwave power densities in excess of 10 milliwatts per square centimeter.
Exposure of employees to inhalation, ingestion, skin absorption, or contact with any material or substance at a concentration above those specified in the "Threshold Limit Values of Airborne Contaminants for 1970" of the American Conference of Governmental Industrial Hygienists, shall be avoided. See appendix A to this section.
To achieve compliance with paragraph (a) of this section, administrative or engineering controls must first be implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in this section. Any equipment and technical measures used for this purpose must first be approved for each particular use by a competent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with §1926.103.
Paragraphs (a) and (b) of this section do not apply to the exposure of employees to airborne asbestos, tremolite, anthophyllite, or actinolite dust. Whenever any employee is exposed to airborne asbestos, tremolite, anthophyllite, or actinolite dust, the requirements of §1910.1101 or §1926.58 of this title shall apply.
Paragraphs (a) and (b) of this section do not apply to the exposure of employees to formaldehyde. Whenever any employee is exposed to formaldehyde, the requirements of §1910.1048 of this title shall apply.

[39 FR 22801, June 24, 1974, as amended at 51 FR 37007, Oct. 17, 1986; 52 FR 46312, Dec. 4, 1987; 58 FR 35089; June 30, 1993]
Appendix A to § 1926.55—1970 American Conference of Governmental Industrial Hygienists' Threshold Limit Values of Airborne Contaminants

Threshold Limit Values of Airborne Contaminants for Construction
Substance CAS No.d ppma* mg/m3b Skin Designation
Abate; see Temephos
Acetaldehyde 75-07-0 200 360 -
Acetic acid 64-19-7 10 25 -
Acetic anhydride 108-24-7 5 20 -
Acetone 67-64-1 1000 2400 -
Acetonitrile 75-05-8 40 70 -
2-Acetylaminofluorine; see §1926.1114 53-96-3
Acetylene 74-86-2 E
Acetylene dichloride; see 1,2-Dichloroethylene
Acetylene tetrabromide 79-27-6 1 14 -
Acrolein 107-02-8 0.1 0.25 -
Acrylamide 79-06-1 - 0.3 X
Acrylonitrile; see §1926.1145 107-13-1
Aldrin 309-00-2 - 0.25 X
Allyl alcohol 107-18-6 2 5 X
Allyl chloride 107-05-1 1 3 -
Allyl glycidyl ether (AGE) 106-92-3 (C)10 (C)45 -
Allyl propyl disulfide 2179-59-1 2 12 -
alpha-Alumina 1344-28-1
Total dust - -
Respirable fraction - -
Alundum; see alpha-Alumina
4-Aminodiphenyl; see §1926.1111 92-67-1
2-Aminoethanol; see Ethanolamine
2-Aminopyridine 504-29-0 0.5 2 -
Ammonia 7664-41-7 50 35 -
Ammonium sulfamate 7773-06-0
Total dust - 15 -
Respirable fraction - 5 -
n-Amyl acetate 628-63-7 100 525 -
sec-Amyl acetate 626-38-0 125 650 -
Aniline and homologs 62-53-3 5 19 X
Anisidine (o-, p-isomers) 29191-52-4 - 0.5 X
Antimony and compounds (as Sb) 7440-36-0 - 0.5 -
ANTU (alpha Naphthylthiourea) 86-88-4 - 0.3 -
Argon 7440-37-1 E
Arsenic, inorganic compounds (as As); see §1926.1118 7440-38-2 - - -
Arsenic, organic compounds (as As) 7440-38-2 - 0.5 -
Arsine 7784-42-1 0.05 0.2 -
Asbestos; see 1926.58
Azinphos-methyl 86-50-0 - 0.2 X
Barium, soluble compounds (as Ba) 7440-39-3 - 0.5 -
Benzeneg; see §1926.1128 71-43-2
Benzidine; see §1926.1110 92-87-5
p-Benzoquinone; see Quinone
Benzo(a)pyrene; see Coal tar pitch volatiles
Benzoyl peroxide 94-36-0 - 5 -
Benzyl chloride 100-44-7 1 5 -
Beryllium and beryllium compounds (as Be); see 1926.1124 (q) 7440-41-7 - 0.002 -
Biphenyl; see Diphenyl
Bisphenol A; see Diglycidyl ether
Boron oxide 1303-86-2
Total dust - 15 -
Boron tribromide 10294-33-4 1 10 -
Boron trifluoride 7637-07-2 (C)1 (C)3 -
Bromine 7726-95-6 0.1 0.7 -
Bromine pentafluoride 7789-30-2 0.1 0.7 -
Bromoform 75-25-2 0.5 5 X
Butadiene (1,3-Butadiene); see 29 CFR 1910.1051; 29 CFR 1910.19(l) 106-99-0 STEL 1 ppm/5 ppm -
Butanethiol; see Butyl mercaptan
2-Butanone (Methyl ethyl ketone) 78-93-3 200 590 -
2-Butoxyethanol 111-76-2 50 240 X
n-Butyl-acetate 123-86-4 150 710 -
sec-Butyl acetate 105-46-4 200 950 -
tert-Butyl acetate 540-88-5 200 950 -
n-Butyl alcohol 71-36-3 100 300 -
sec-Butyl alcohol 78-92-2 150 450 -
tert-Butyl alcohol 75-65-0 100 300 -
Butylamine 109-73-9 (C)5 (C)15 X
tert-Butyl chromate (as CrO3); see 1926.1126n 1189-85-1
n-Butyl glycidyl ether (BGE) 2426-08-6 50 270 -
Butyl mercaptan 109-79-5 0.5 1.5 -
p-tert-Butyltoluene 98-51-1 10 60 -
Cadmium (as Cd); see 1926.1127 7440-43-9
Calcium carbonate 1317-65-3
Total dust - -
Respirable fraction - -
Calcium oxide 1305-78-8 - 5 -
Calcium sulfate 7778-18-9
Total dust - 15 -
Respirable fraction - 5 -
Camphor, synthetic 76-22-2 - 2 -
Carbaryl (Sevin) 63-25-2 - 5 -
Carbon black 1333-86-4 - 3.5 -
Carbon dioxide 124-38-9 5000 9000 -
Carbon disulfide 75-15-0 20 60 X
Carbon monoxide 630-08-0 50 55 -
Carbon tetrachloride 56-23-5 10 65 X
Cellulose 9004-34-6
Total dust - -
Respirable fraction - -
Chlordane 57-74-9 - 0.5 X
Chlorinated camphene 8001-35-2 - 0.5 X
Chlorinated diphenyl oxide 55720-99-5 - 0.5 -
Chlorine 7782-50-5 1 3 -
Chlorine dioxide 10049-04-4 0.1 0.3
Chlorine trifluoride 7790-91-2 (C)0.1 (C)0.4 -
Chloroacetaldehyde 107-20-0 (C)1 (C)3 -
a-Chloroacetophenone (Phenacyl chloride) 532-27-4 0.05 0.3 -
Chlorobenzene 108-90-7 75 350 -
o-Chlorobenzylidene malononitrile 2698-41-1 0.05 0.4 -
Chlorobromomethane 74-97-5 200 1050 -
2-Chloro-1,3-butadiene; see beta-Chloroprene
Chlorodiphenyl (42% Chlorine) (PCB) 53469-21-9 - 1 X
Chlorodiphenyl (54% Chlorine) (PCB) 11097-69-1 - 0.5 X
1-Chloro,2,3-epoxypropane; see Epichlorohydrin
2-Chloroethanol; see Ethylene chlorohydrin
Chloroethylene; see Vinyl chloride
Chloroform (Trichloromethane) 67-66-3 (C)50 (C)240 -
bis(Chloromethyl) ether; see §1926.1108 542-88-1
Chloromethyl methyl ether; see §1926.1106 107-30-2
1-Chloro-1-nitropropane 600-25-9 20 100 -
Chloropicrin 76-06-2 0.1 0.7 -
beta-Chloroprene 126-99-8 25 90 X
Chromium (II) compounds
(as Cr) 7440-47-3 - 0.5 -
Chromium (III) compounds
(as Cr) 7440-47-3 - 0.5 -
Chromium (VI) compounds; See 1926.1126o
Chromium metal and insol. salts (as Cr) 7440-47-3 - 1 -
Chrysene; see Coal tar pitch volatiles
Coal tar pitch volatiles (benzene soluble fraction), anthracene, BaP, phenanthrene, acridine, chrysene, pyrene 65996-93-2 - 0.2 -
Cobalt metal, dust, and fume (as Co) 7440-48-4 - 0.1 -
Coke oven emissions; see §1926.1129
Copper 7440-50-8
Fume (as Cu) - 0.1 -
Dusts and mists (as Cu) - 1 -
Corundum; see Emery
Cotton dust (raw) - 1
Crag herbicide (Sesone) 136-78-7
Total dust - -
Respirable fraction - -
Cresol, all isomers 1319-77-3 5 22 X
Crotonaldehyde 123-73-9; 2 6
4170-30-3
Cumene 98-82-8 50 245 X
Cyanides (as CN) Varies with Compound - 5 X
Cyanogen 460-19-5 10 - -
Cyclohexane 110-82-7 300 1050 -
Cyclohexanol 108-93-0 50 200 -
Cyclohexanone 108-94-1 50 200 -
Cyclohexene 110-83-8 300 1015 -
Cyclonite 121-82-4 - 1.5 X
Cyclopentadiene 542-92-7 75 200 -
DDT, see Dichlorodiphenyltrichloroethane
DDVP, see Dichlorvos
2,4-D (Dichlorophenoxyacetic acid) 94-75-7 - 10 -
Decaborane 17702-41-9 0.05 0.3 X
Demeton (Systox) 8065-48-3 - 0.1 X
Diacetone alcohol (4-Hydroxy-4-methyl-2-pentanone) 123-42-2 50 240 -
1,2-Diaminoethane; see Ethylenediamine
Diazomethane 334-88-3 0.2 0.4 -
Diborane 19287-45-7 0.1 0.1 -
1,2-Dibromo-3-chloropropane (DBCP); see §1926.1144 96-12-8 -
1,2-Dibromoethane; see Ethylene dibromide
Dibutyl phosphate 107-66-4 1 5 -
Dibutyl phthalate 84-74-2 - 5 -
Dichloroacetylene 7572-29-4 (C)0.1 (C)0.4 -
o-Dichlorobenzene 95-50-1 (C)50 (C)300 -
p-Dichlorobenzene 106-46-7 75 450 -
3,3′-Dichlorobenzidine; see §1926.1107 91-94-1
Dichlorodifluoromethane 75-71-8 1000 4950 -
1,3-Dichloro-5,5-dimethyl hydantoin 118-52-5 - 0.2 -
Dichlorodiphenyltrichloroethane (DDT) 50-29-3 - 1 X
1,1-Dichloroethane 75-34-3 100 400 -
1,2-Dichloroethane; see Ethylene dichloride
1,2-Dichloroethylene 540-59-0 200 790 -
Dichloroethyl ether 111-44-4 (C)15 (C)90 X
Dichloromethane; see Methylene chloride
Dichloromonofluoromethane 75-43-4 1000 4200 -
1,1-Dichloro-1-nitroethane 594-72-9 (C)10 (C)60 -
1,2-Dichloropropane; see Propylene dichloride
Dichlorotetrafluoroethane 76-14-2 1000 7000 -
Dichlorvos (DDVP) 62-73-7 - 1 X
Dieldrin 60-57-1 - 0.25 X
Diethylamine 109-89-7 25 75 -
2-Diethylaminoethanol 100-37-8 10 50 X
Diethylene triamine 111-40-0 (C)10 (C)42 X
Diethyl ether; see Ethyl ether
Difluorodibromomethane 75-61-6 100 860 -
Diglycidyl ether (DGE) 2238-07-5 (C)0.5 (C)2.8 -
Dihydroxybenzene; see Hydroquinone
Diisobutyl ketone 108-83-8 50 290 -
Diisopropylamine 108-18-9 5 20 X
4-Dimethylaminoazobenzene; see §1926.1115 60-11-7
Dimethoxymethane; see Methylal
Dimethyl acetamide 127-19-5 10 35 X
Dimethylamine 124-40-3 10 18 -
Dimethylaminobenzene; see Xylidine
Dimethylaniline (N,N-Dimethylaniline) 121-69-7 5 25 X
Dimethylbenzene; see Xylene
Dimethyl-1,2-dibromo- 2,2-dichloroethyl phosphate 300-76-5 - 3 -
Dimethylformamide 68-12-2 10 30 X
2,6-Dimethyl-4-heptanone; see Diisobutyl ketone
1,1-Dimethylhydrazine 57-14-7 0.5 1 X
Dimethylphthalate 131-11-3 - 5 -
Dimethyl sulfate 77-78-3 1 5 X
Dinitrobenzene (all isomers) 1 X
(ortho) 528-29-0
(meta) 99-65-0
(para) 100-25-4
Dinitro-o-cresol 534-52-1 - 0.2 X
Dinitrotoluene 25321-14-6 - 1.5 X
Dioxane (Diethylene dioxide) 123-91-1 100 360 X
Diphenyl (Biphenyl) 92-52-4 0.2 1 -
Diphenylamine 122-39-4 - 10 -
Diphenylmethane diisocyanate; see Methylene bisphenyl isocyanate
Dipropylene glycol methyl ether 34590-94-8 100 600 X
Di-sec octyl phthalate (Di-(2-ethylhexyl) phthalate) 117-81-7 - 5 -
Emery 12415-34-8
Total dust - -
Respirable fraction - -
Endosulfan 115-29-7 - 0.1 X
Endrin 72-20-8 - 0.1 X
Epichlorohydrin 106-89-8 5 19 X
EPN 2104-64-5 - 0.5 X
1,2-Epoxypropane; see Propylene oxide
2,3-Epoxy-1-propanol; see Glycidol
Ethane 74-84-0 E
Ethanethiol; see Ethyl mercaptan
Ethanolamine 141-43-5 3 6 -
2-Ethoxyethanol (Cellosolve) 110-80-5 200 740 X
2-Ethoxyethyl acetate (Cellosolve acetate) 111-15-9 100 540 X
Ethyl acetate 141-78-6 400 1400 -
Ethyl acrylate 140-88-5 25 100 X
Ethyl alcohol (Ethanol) 64-17-5 1000 1900 -
Ethylamine 75-04-7 10 18 -
Ethyl amyl ketone (5-Methyl-3-heptanone) 541-85-5 25 130 -
Ethyl benzene 100-41-4 100 435 -
Ethyl bromide 74-96-4 200 890 -
Ethyl butyl ketone (3-Heptanone) 106-35-4 50 230 -
Ethyl chloride 75-00-3 1000 2600 -
Ethyl ether 60-29-7 400 1200 -
Ethyl formate 109-94-4 100 300 -
Ethyl mercaptan 75-08-1 0.5 1 -
Ethyl silicate 78-10-4 100 850 -
Ethylene 74-85-1 E
Ethylene chlorohydrin 107-07-3 5 16 X
Ethylenediamine 107-15-3 10 25 -
Ethylene dibromide 106-93-4 (C)25 (C)190 X
Ethylene dichloride (1,2-Dichloroethane) 107-06-2 50 200 -
Ethylene glycol dinitrate 628-96-6 (C)0.2 (C)1 X
Ethylene glycol methyl acetate; see Methyl cellosolve acetate
Ethyleneimine; see §1926.1112 151-56-4
Ethylene oxide; see §1926.1147 75-21-8
Ethylidene chloride; see 1,1-Dichloroethane
N-Ethylmorpholine 100-74-3 20 94 X
Ferbam 14484-64-1
Total dust - 15 -
Ferrovanadium dust 12604-58-9 - 1 -
Fibrous Glass
Total dust -
Respirable fraction - -
Fluorides (as F) Varies with compound - 2.5 -
Fluorine 7782-41-4 0.1 0.2 -
Fluorotrichloromethane (Trichlorofluoromethane) 75-69-4 1000 5600 -
Formaldehyde; see §1926.1148 50-00-0
Formic acid 64-18-6 5 9 -
Furfural 98-01-1 5 20 X
Furfuryl alcohol 98-00-0 50 200 -
Gasoline 8006-61-9 A3 -
Glycerin (mist) 56-81-5
Total dust - -
Respirable fraction - -
Glycidol 556-52-5 50 150 -
Glycol monoethyl ether; see 2-Ethoxyethanol
Graphite, natural, respirable dust 7782-42-5 (2) (2) (2)
Graphite, synthetic
Total dust - -
Respirable fraction - -
Guthion; see Azinphos methyl
Gypsum 13397-24-5
Total dust - -
Respirable fraction - -
Hafnium 7440-58-6 - 0.5 -
Helium 7440-59-7 E
Heptachlor 76-44-8 - 0.5 X
Heptane (n-Heptane) 142-82-5 500 2000 -
Hexachloroethane 67-72-1 1 10 X
Hexachloronaphthalene 1335-87-1 - 0.2 X
n-Hexane 110-54-3 500 1800 -
2-Hexanone (Methyl n-butyl ketone) 591-78-6 100 410 -
Hexone (Methyl isobutyl ketone) 108-10-1 100 410 -
sec-Hexyl acetate 108-84-9 50 300 -
Hydrazine 302-01-2 1 1.3 X
Hydrogen 1333-74-0 E
Hydrogen bromide 10035-10-6 3 10 -
Hydrogen chloride 7647-01-0 (C)5 (C)7 -
Hydrogen cyanide 74-90-8 10 11 X
Hydrogen fluoride (as F) 7664-39-3 3 2 -
Hydrogen peroxide 7722-84-1 1 1.4 -
Hydrogen selenide (as Se) 7783-07-5 0.05 .02 -
Hydrogen sulfide 7783-06-4 10 15 -
Hydroquinone 123-31-9 - 2 -
Indene 95-13-6 10 45 -
Indium and compounds (as In) 7440-74-6 - 0.1 -
Iodine 7553-56-2 (C)0.1 (C)1 -
Iron oxide fume 1309-37-1 - 10 -
Iron salts (soluble) (as Fe) Varies with compound - 1 -
Isoamyl acetate 123-92-2 100 525 -
Isoamyl alcohol (primary and secondary) 123-51-3 100 360 -
Isobutyl acetate 110-19-0 150 700 -
Isobutyl alcohol 78-83-1 100 300 -
Isophorone 78-59-1 25 140 -
Isopropyl acetate 108-21-4 250 950 -
Isopropyl alcohol 67-63-0 400 980 -
Isopropylamine 75-31-0 5 12 -
Isopropyl ether 108-20-3 500 2100 -
Isopropyl glycidyl ether (IGE) 4016-14-2 50 240 -
Kaolin 1332-58-7
Total dust - -
Respirable fraction - -
Ketene 463-51-4 0.5 0.9 -
Lead, inorganic (as Pb); see 1926.62 7439-92-1
Limestone 1317-65-3
Total dust - -
Respirable fraction - -
Lindane 58-89-9 - 0.5 X
Lithium hydride 7580-67-8 - 0.025 -
L.P.G. (Liquefied petroleum gas) 68476-85-7 1000 1800
Magnesite 546-93-0
Total dust - -
Respirable fraction - -
Magnesium oxide fume 1309-48-4
Total particulate 15 - -
Malathion 121-75-5
Total dust - 15 X
Maleic anhydride 108-31-6 0.25
Manganese compounds (as Mn) 7439-96-5 - (C)5 -
Manganese fume (as Mn) 7439-96-5 - (C)5 -
Marble 1317-65-3
Total dust - -
Respirable fraction - -
Mercury (aryl and inorganic)(as Hg) 7439-97-6 0.1 X
Mercury (organo) alkyl compounds (as Hg) 7439-97-6 - 0.01 X
Mercury (vapor) (as Hg) 7439-97-6 - 0.1 X
Mesityl oxide 141-79-7 25 100 -
Methane 74-82-8 E
Methanethiol; see Methyl mercaptan
Methoxychlor 72-43-5
Total dust - 15 -
2-Methoxyethanol (Methyl cellosolve) 109-86-4 25 80 X
2-Methoxyethyl acetate (Methyl cellosolve acetate) 110-49-6 25 120 X
Methyl acetate 79-20-9 200 610 -
Methyl acetylene (Propyne) 74-99-7 1000 1650 -
Methyl acetylene-propadiene mixture (MAPP) 1000 1800 -
Methyl acrylate 96-33-3 10 35 X
Methylal (Dimethoxy-methane) 109-87-5 1000 3100 -
Methyl alcohol 67-56-1 200 260 -
Methylamine 74-89-5 10 12 -
Methyl amyl alcohol; see Methyl isobutyl carbinol
Methyl n-amyl ketone 110-43-0 100 465 -
Methyl bromide 74-83-9 (C)20 (C)80 X
Methyl butyl ketone; see 2-Hexanone
Methyl cellosolve; see 2-Methoxyethanol
Methyl cellosolve acetate; see 2-Methoxyethyl acetate
Methylene chloride; see §1910.1052
Methyl chloroform (1,1,1-Trichloroethane) 71-55-6 350 1900 -
Methylcyclohexane 108-87-2 500 2000 -
Methylcyclohexanol 25639-42-3 100 470 -
o-Methylcyclohexanone 583-60-8 100 460 X
Methylene chloride 75-09-2 500 1740 -
Methylenedianiline (MDA) 101-77-9
Methyl ethyl ketone (MEK); see 2-Butanone
Methyl formate 107-31-3 100 250 -
Methyl hydrazine (Monomethyl hydrazine) 60-34-4 (C)0.2 (C)0.35 X
Methyl iodide 74-88-4 5 28 X
Methyl isoamyl ketone 110-12-3 100 475 -
Methyl isobutyl carbinol 108-11-2 25 100 X
Methyl isobutyl ketone; see Hexone
Methyl isocyanate 624-83-9 0.02 0.05 X
Methyl mercaptan 74-93-1 0.5 1 -
Methyl methacrylate 80-62-6 100 410 -
Methyl propyl ketone; see 2-Pentanone
Methyl silicate 681-84-5 (C)5 (C)30 -
alpha-Methyl styrene 98-83-9 (C)100 (C)480 -
Methylene bisphenyl isocyanate (MDI) 101-68-8 (C)0.02 (C)0.2 -
Mica; see Silicates
Molybdenum (as Mo) 7439-98-7
Soluble compounds - 5 -
Insoluble compounds
Total dust - 15 -
Monomethyl aniline 100-61-8 2 9 X
Monomethyl hydrazine; see Methyl hydrazine
Morpholine 110-91-8 20 70 X
Naphtha (Coal tar) 8030-30-6 100 400 -
Naphthalene 91-20-3 10 50 -
alpha-Naphthylamine; see §1926.1104 134-32-7
beta-Naphthylamine; see §1926.1109 91-59-8 -
Neon 7440-01-9 E
Nickel carbonyl (as Ni) 13463-39-3 0.001 0.007 -
Nickel, metal and insoluble compounds (as Ni) 7440-02-0 - 1 -
Nickel, soluble compounds (as Ni) 7440-02-0 - 1 -
Nicotine 54-11-5 - 0.5 X
Nitric acid 7697-37-2 2 5 -
Nitric oxide 10102-43-9 25 30 -
p-Nitroaniline 100-01-6 1 6 X
Nitrobenzene 98-95-3 1 5 X
p-Nitrochlorobenzene 100-00-5 - 1 X
4-Nitrodiphenyl; see §1926.1103 92-93-3
Nitroethane 79-24-3 100 310 -
Nitrogen 7727-37-9 E
Nitrogen dioxide 10102-44-0 (C)5 (C)9 -
Nitrogen trifluoride 7783-54-2 10 29 -
Nitroglycerin 55-63-0 (C)0.2 (C)2 X
Nitromethane 75-52-5 100 250 -
1-Nitropropane 108-03-2 25 90 -
2-Nitropropane 79-46-9 25 90 -
N-Nitrosodimethylamine; see §1926.1116 62-79-9 -
Nitrotoluene (all isomers) 5 30 X
o-isomer 88-72-2;
m-isomer 99-08-1;
p-isomer 99-99-0
Nitrotrichloromethane; see Chloropicrin
Nitrous oxide 10024-97-2 E
Octachloronaphthalene 2234-13-1 - 0.1 X
Octane 111-65-9 400 1900 -
Oil mist, mineral 8012-95-1 - 5 -
Osmium tetroxide (as Os) 20816-12-0 - 0.002 -
Oxalic acid 144-62-7 - 1 -
Oxygen difluoride 7783-41-7 0.05 0.1 -
Ozone 10028-15-6 0.1 0.2 -
Paraquat, respirable dust 4685-14-7; - 0.5 X
1910-42-5;
2074-50-2
Parathion 56-38-2 - 0.1 X
Particulates not otherwise regulated
Total dust organic and inorganic - 15 -
PCB; see Chlorodiphenyl (42% and 54% chlorine)
Pentaborane 19624-22-7 0.005 0.01 -
Pentachloronaphthalene 1321-64-8 - 0.5 X
Pentachlorophenol 87-86-5 - 0.5 X
Pentaerythritol 115-77-5
Total dust - -
Respirable fraction - -
Pentane 109-66-0 500 1500 -
2-Pentanone (Methyl propyl ketone) 107-87-9 200 700 -
Perchloroethylene (Tetrachloroethylene) 127-18-4 100 670 -
Perchloromethyl mercaptan 594-42-3 0.1 0.8 -
Perchloryl fluoride 7616-94-6 3 13.5 -
Petroleum distillates (Naphtha)(Rubber Solvent) A3 -
Phenol 108-95-2 5 19 X
p-Phenylene diamine 106-50-3 - 0.1 X
Phenyl ether, vapor 101-84-8 1 7 -
Phenyl ether-biphenyl mixture, vapor 1 7 -
Phenylethylene; see Styrene
Phenyl glycidyl ether (PGE) 122-60-1 10 60 -
Phenylhydrazine 100-63-0 5 22 X
Phosdrin (Mevinphos) 7786-34-7 - 0.1 X
Phosgene (Carbonyl chloride) 75-44-5 0.1 0.4 -
Phosphine 7803-51-2 0.3 0.4 -
Phosphoric acid 7664-38-2 - 1 -
Phosphorus (yellow) 7723-14-0 - 0.1 -
Phosphorus pentachloride 10026-13-8 - 1 -
Phosphorus pentasulfide 1314-80-3 - 1 -
Phosphorus trichloride 7719-12-2 0.5 3 -
Phthalic anhydride 85-44-9 2 12 -
Picric acid 88-89-1 - 0.1 X
Pindone (2-Pivalyl-1,3-indandione) 83-26-1 - 0.1 -
Plaster of Paris 26499-65-0
Total dust - -
Respirable fraction - -
Platinum (as Pt) 7440-06-4
Metal - - -
Soluble salts - 0.002 -
Polytetrafluoroethylene decomposition products A2
Portland cement 65997-15-1
Total dust - 15 -
Respirable fraction 5 -
Propane 74-98-6 E
Propargyl alcohol 107-19-7 1 - X
beta-Propriolactone; see §1926.1113 57-57-8
n-Propyl acetate 109-60-4 200 840 -
n-Propyl alcohol 71-23-8 200 500 -
n-Propyl nitrate 627-13-4 25 110 -
Propylene dichloride 78-87-5 75 350 -
Propylene imine 75-55-8 2 5 X
Propylene oxide 75-56-9 100 240 -
Propyne; see Methyl acetylene
Pyrethrum 8003-34-7 - 5 -
Pyridine 110-86-1 5 15 -
Quinone 106-51-4 0.1 0.4 -
RDX; see Cyclonite
Rhodium (as Rh), metal fume and insoluble compounds 7440-16-6 - 0.1 -
Rhodium (as Rh), soluble compounds 7440-16-6 - 0.001 -
Ronnel 299-84-3 - 10 -
Rotenone 83-79-4 - 5 -
Rouge
Total dust - -
Respirable fraction - -
Selenium compounds (as Se) 7782-49-2 - 0.2 -
Selenium hexafluoride (as Se) 7783-79-1 0.05 0.4 -
Silica, amorphous, precipitated and gel 112926-00-8 (2) (2) (2)
Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica 61790-53-2 (2) (2) (2)
Silica, crystalline, respirable dust
Cristobalite; see 1926.1153 14464-46-1
Quartz; see 1926.11535 14808-60-7
Tripoli (as quartz); see 1926.11535 1317-95-9
Tridymite; see 1926.1153 15468-32-3
Silica, fused, respirable dust 60676-86-0 (2) (2) (2)
Silicates (less than 1% crystalline silica)
Mica (respirable dust) 12001-26-2 (2) (2) (2)
Soapstone, total dust (2) (2) (2)
Soapstone, respirable dust (2) (2) (2)
Talc (containing asbestos); use asbestos limit; see 1926.58
Talc (containing no asbestos), respirable dust 14807-96-6 (2) (2) (2)
Tremolite, asbestiform; see 1926.58
Silicon carbide 409-21-2
Total dust - -
Respirable fraction - -
Silver, metal and soluble compounds (as Ag) 7440-22-4 - 0.01 -
Soapstone; see Silicates
Sodium fluoroacetate 62-74-8 - 0.05 X
Sodium hydroxide 1310-73-2 - 2 -
Starch 9005-25-8
Total dust - -
Respirable fraction - -
Stibine 7803-52-3 0.1 0.5 -
Stoddard solvent 8052-41-3 200 1150 -
Strychnine 57-24-9 - 0.15 -
Styrene 100-42-5 (C)100 (C)420 -
Sucrose 57-50-1
Total dust - -
Respirable fraction - -
Sulfur dioxide 7446-09-5 5 13 -
Sulfur hexafluoride 2551-62-4 1000 6000 -
Sulfuric acid 7664-93-9 - 1 -
Sulfur monochloride 10025-67-9 1 6 -
Sulfur pentafluoride 5714-22-7 0.025 0.25 -
Sulfuryl fluoride 2699-79-8 5 20 -
Systox, see Demeton
2,4,5-T (2,4,5-trichlorophenoxyacetic acid) 93-76-5 - 10 -
Talc; see Silicates-
Tantalum, metal and oxide dust 7440-25-7 - 5 -
TEDP (Sulfotep) 3689-24-5 - 0.2 X
Teflon decomposition products A2
Tellurium and compounds (as Te) 13494-80-9 - 0.1 -
Tellurium hexafluoride (as Te) 7783-80-4 0.02 0.2 -
Temephos 3383-96-8
Total dust - -
Respirable fraction - -
TEPP (Tetraethyl pyrophosphate) 107-49-3 - 0.05 X
Terphenyls 26140-60-3 (C)1 (C)9 -
1,1,1,2-Tetrachloro-2,2-difluoroethane 76-11-9 500 4170 -
1,1,2,2-Tetrachloro-1,2-difluoroethane 76-12-0 500 4170 -
1,1,2,2-Tetrachloroethane 79-34-5 5 35 X
Tetrachloroethylene; see Perchloroethylene
Tetrachloromethane; see Carbon tetrachloride
Tetrachloronaphthalene 1335-88-2 - 2 X
Tetraethyl lead (as Pb) 78-00-2 - 0.1 X
Tetrahydrofuran 109-99-9 200 590 -
Tetramethyl lead, (as Pb) 75-74-1 - 0.15 X
Tetramethyl succinonitrile 3333-52-6 0.5 3 X
Tetranitromethane 509-14-8 1 8 -
Tetryl (2,4,6-Trinitrophenylmethylnitramine) 479-45-8 - 1.5 X
Thallium, soluble compounds (as Tl) 7440-28-0 - 0.1 X
Thiram 137-26-8 - 5 -
Tin, inorganic compounds (except oxides) (as Sn) 7440-31-5 - 2 -
Tin, organic compounds (as Sn) 7440-31-5 - 0.1 -
Tin oxide (as Sn) 21651-19-4 - - -
Total dust - -
Respirable fraction - -
Titanium dioxide 13463-67-7
Total dust - -
Toluene 108-88-3 200 750 -
Toluene-2,4-diisocyanate (TDI) 584-84-9 (C)0.02 (C)0.14 -
o-Toluidine 95-53-4 5 22 X
Toxaphene; see Chlorinated camphene
Tremolite; see Silicates
Tributyl phosphate 126-73-8 - 5 -
1,1,1-Trichloroethane; see Methyl chloroform
1,1,2-Trichloroethane 79-00-5 10 45 X
Trichloroethylene 79-01-6 100 535 -
Trichloromethane; see Chloroform
Trichloronaphthalene 1321-65-9 - 5 X
1,2,3-Trichloropropane 96-18-4 50 300 -
1,1,2-Trichloro-1,2,2-trifluoroethane 76-13-1 1000 7600 -
Triethylamine 121-44-8 25 100 -
Trifluorobromomethane 75-63-8 1000 6100 -
Trimethyl benzene 25551-13-7 25 120 -
2,4,6-Trinitrophenol; see Picric acid
2,4,6-Trinitrophenylmethylnitramine; see Tetryl
2,4,6-Trinitrotoluene (TNT) 118-96-7 - 1.5 X
Triorthocresyl phosphate 78-30-8 - 0.1 -
Triphenyl phosphate 115-86-6 - 3 -
Tungsten (as W) 7440-33-7
Insoluble compounds - 5 -
Soluble compounds - 1 -
Turpentine 8006-64-2 100 560 -
Uranium (as U) 7440-61-1
Soluble compounds - 0.2 -
Insoluble compounds - 0.2 -
Vanadium 1314-62-1
Respirable dust (as V2O5) - (C)0.5 -
Fume (as V2O5) - (C)0.1 -
Vegetable oil mist
Total dust - -
Respirable fraction - -
Vinyl benzene; see Styrene
Vinyl chloride; see §1926.1117 75-01-4
Vinyl cyanide; see Acrylonitrile
Vinyl toluene 25013-15-4 100 480 -
Warfarin 81-81-2 - 0.1 -
Xylenes (o-, m-, p-isomers) 1330-20-7 100 435 -
Xylidine 1300-73-8 5 25 X
Yttrium 7440-65-5 - 1 -
Zinc chloride fume 7646-85-7 - 1 -
Zinc oxide fume 1314-13-2 - 5 -
Zinc oxide 1314-13-2
Total dust - 15 -
Respirable fraction - 5 -
Zirconium compounds (as Zr) 7440-67-7 - 5