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[Cover - Selected Construction Regulations for the Home Building Industry] Selected Construction
Regulations for the Home
Building Industry



U.S. Department of Labor
Occupational Safety and Health Administration

1997








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[Seal - US Department of Labor]
Selected Construction
Regulations for the Home
Building Industry
U.S. Department of Labor
Alexis M. Herman, Secretary Occupational Safety and Health Administration
Gregory R. Watchman, Acting Assistant Secretary



Note: This publication, developed to assist residential construction employers in providing safe and healthful workplaces, contains Federal OSHA standards most applicable to this industry. The 23 states that operate OSHA-approved state plans have equivalent construction standards but also may have some different or additional requirements. For information on state requirements, please contact the specific state in question. See the listing of OSHA-approved state plans at www.osha.gov/dcsp/osp/states.html for addresses, telephone numbers, and links to state websites.



SELECTED CONSTRUCTION REGULATIONS (SCOR)
FOR THE HOME BUILDING INDUSTRY
(29 CFR 1926)


Contents
Preface Subpart A - General
§ 1926.1 - Purpose and scope
§ 1926.2 - Variances from safety and health standards
§ 1926.3 - Inspections - right of entry
§ 1926.4 - Rules of practice for administrative adjudications for enforcement of safety and health standards
Subpart B - General Interpretations
§ 1926.10 - Scope of subpart
§ 1926.11 - Coverage under section 103 of the act distinguished
§ 1926.13 - Interpretation of statutory terms
§ 1926.14 - Federal contract for "mixed" types of performance
§ 1926.15 - Relationship to the Service Contract Act; Walsh-Healey Public Contracts Act
§ 1926.16 - Rules of construction
Subpart C - General Safety and Health Provisions
§ 1926.20 - General safety and health provisions
§ 1926.21 - Safety training and education
§ 1926.23 - First aid and medical attention
§ 1926.24 - Fire protection and prevention
§ 1926.25 - Housekeeping
§ 1926.26 - Illumination
§ 1926.27 - Sanitation
§ 1926.28 - Personal protective equipment
§ 1926.31 - Incorporation by reference
§ 1926.32 - Definitions
§ 1926.33 - Access to employee exposure and medical records
§ 1926.34 - Means of egress
Subpart D - Occupational Health and Environmental Controls
§ 1926.50 - Medical services and first aid
§ 1926.51 - Sanitation
§ 1926.52 - Occupational noise exposure
§ 1926.54 - Nonionizing radiation
§ 1926.55 - Gases, vapors, fumes, dusts, and mists
§ 1926.55 - Appendix A - Gases, vapors, fumes, dusts, and mists
§ 1926.56 - Illumination
§ 1926.57 - Ventilation
§ 1926.59 - Hazard communication
§ 1926.62 - Lead
Subpart E - Personal Protective and Life Saving Equipment
§ 1926.95 - Criteria for personal protective equipment
§ 1926.96 - Occupational foot protection
§ 1926.100 - Head protection
§ 1926.101 - Hearing protection
§ 1926.102 - Eye and face protection
§ 1926.103 - Respiratory protection
§ 1926.104 - Safety belts, lifelines, and lanyards
Subpart F - Fire Protection and Prevention
§ 1926.150 - Fire protection
§ 1926.151 - Fire prevention
§ 1926.152 - Flammable and combustible liquids
§ 1926.153 - Liquefied petroleum gas (LP-Gas)
§ 1926.154 - Temporary heating devices
§ 1926.155 - Definitions applicable to this subpart
Subpart G - Signs, Signals, and Barricades
§ 1926.200 - Accident prevention signs and tags
§ 1926.203 - Definitions applicable to this subpart
Subpart H - Materials Handling, Storage, Use, and Disposal
§ 1926.251 - Rigging equipment for material handling
§ 1926.252 - Disposal of waste materials
Subpart I - Tools - Hand and Power
§ 1926.300 - General requirements
§ 1926.301 - Hand tools
§ 1926.302 - Power-operated hand tools
§ 1926.304 - Woodworking tools
Subpart J - Welding and Cutting
§ 1926.350 - Gas welding and cutting
§ 1926.352 - Fire prevention
Subpart K - Electrical
§ 1926.400 - Electrical - General
§ 1926.402 - Applicability
§ 1926.403 - General requirements
§ 1926.404 - Wiring design and protection
§ 1926.405 - Wiring methods, components, and equipment for general use
§ 1926.416 - General requirements
§ 1926.417 - Lockout and tagging of circuits
§ 1926.432 - Environmental deterioration of equipment
§ 1926.449 - Definitions applicable to this subpart
Subpart L - Scaffolds
§ 1926.450 - Scope, application and definitions applicable to this subpart
§ 1926.451 - General requirements
§ 1926.452 - Additional requirements applicable to specific types of scaffolds
§ 1926.454 - Training requirements
Subpart L Appendix A - Scaffold Specifications
Subpart L Appendix C - List of National Consensus Standards
Subpart L Appendix D - List of Training Topics for Scaffold Erectors and Dismantlers
Subpart M - Fall Protection
§ 1926.500 - Scope, application, and definitions applicable to this subpart
§ 1926.501 - Duty to have fall protection
§ 1926.502 - Fall protection systems criteria and practices
§ 1926.503 - Training requirements
Subpart M Appendix A - Determining Roof Widths - Non-mandatory Guidelines for Complying with 1926.501(b)(10)
Subpart M Appendix B - Guardrail Systems - Non-Mandatory Guidelines for Complying with 1926.502(b)
Subpart M Appendix C - Personal Fall Arrest Systems - Non-Mandatory Guidelines for Complying with 1926.502(d)
Subpart M Appendix D - Positioning Device Systems - Non-Mandatory Guidelines for Complying with 1926.502(e)
Subpart M Appendix E - Sample Fall Protection Plan - Non-Mandatory Guidelines for Complying with 1926.502(k)
Subpart N - Cranes, Derricks, Hoists, Elevators, and Conveyors
§ 1926.550 - Cranes and derricks
Subpart O - Motor Vehicles, Mechanized Equipment, and Marine Operations
§ 1926.601 - Motor vehicles
§ 1926.602 - Material handling equipment
§ 1926.604 - Mechanized equipment, and marine operations
Subpart P - Excavations
§ 1926.650 - Scope, application, and definitions applicable to this subpart
§ 1926.651 - Specific excavation requirements
§ 1926.652 - Requirements for protective systems
Subpart P Appendix A - Soil Classification
Subpart P Appendix B - Sloping and Benching
Subpart Q - Concrete and Masonry Construction
§ 1926.700 - Scope, application, and definitions applicable to this subpart
§ 1926.701 - General requirements
§ 1926.702 - Requirements for equipment and tools
§ 1926.703 - Requirements for cast-in-place concrete
§ 1926.706 - Requirements for masonry construction
Subpart T - Demolition
§ 1926.850 - Preparatory operations
Subpart W - Rollover Protective Structures; Overhead Protection
§ 1926.1000 - Rollover protective structures (ROPS) for material handling equipment
Subpart X - Stairways and Ladders
§ 1926.1050 - Scope, application, and definitions applicable to this subpart
§ 1926.1051 - General requirements
§ 1926.1052 - Stairways
§ 1926.1053 - Ladders
§ 1926.1060 - Training requirements
Subpart Z - Toxic and Hazardous Substances
§ 1926.1101 - Asbestos
§ 1926.1148 - Formaldehyde
§ 1926.1152 - Methylene chloride



The Occupational Safety and Health Administration (OSHA) has published this document to assist residential construction employers and employees in providing safe and healthful workplaces. This publication identifies OSHA standards applicable to the hazards most commonly found at work sites in the residential construction industry and those most likely to have a significant positive impact on the safety and health practices of contractors within this industry.
This publication does not itself alter or determine compliance responsibilities as contained in OSHA standards and the Occupational Safety and Health Act of 1970. Consequently, OSHA notes that other standards not included in this document remain applicable to the residential construction industry and abatement actions must be implemented by the contractor.
For the complete text of all OSHA standards for the construction industry, please see Title 29 of the Code of Federal Regulations (CFR) Part 1926. The CFR is sold by and available from the U.S. Government Printing Office, Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250-7954, (202)512-1800 (phone), or (202)512-2250 (fax). All OSHA regulations are also available online at http://www.osha.gov/.






§ 1926.1 - Purpose and scope.
(a) This part sets forth the safety and health standards promulgated by the Secretary of Labor under section 107 of the Contract Work Hours and Safety Standards Act. The standards are published in Subpart C of this part and following subparts.

(b) Subpart B of this part contains statements of general policy and interpretations of section 107 of the Contract Work Hours and Safety Standards Act having general applicability.

§ 1926.2 - Variances from safety and health standards.
(a) Variances from standards which are, or may be, published in this part may be granted under the same circumstances whereunder variances may be granted under section 6(b)(A) or 6(d) of the Williams-Steiger Occupational Safety and Health Act of 1970 (29 U.S.C. 65). The procedures for the granting of variances and for related relief under this part are those published in Part 1905 of this title.

(b) Any requests for variances under this section shall also be considered requests for variances under the Williams-Steiger Occupational Safety and Health Act of 1970, and any requests for variances under Williams-Steiger Occupational Safety and Health Act with respect to construction safety or health standards shall be considered to be also variances under the Construction Safety Act. Any variance from a construction safety or health standard which is contained in this part and which is incorporated by reference in Part 1910 of this title shall be deemed a variance from the standard under both the Construction Safety Act and the Williams-Steiger Occupational Safety and Health Act of 1970.

§ 1926.3 - Inspections - right of entry.
(a) It shall be a condition of each contract which is subject to section 107 of the Contract Work Hours and Safety Standards Act that the Secretary of Labor or any authorized representative shall have a right of entry to any site of contract performance for the following purposes:

(a)(1) To inspect or investigate the matter of compliance with the safety and health standards contained in Subpart C of this part and following subparts; and

(a)(2) To carry out the duties of the Secretary under section 107(b) of the Act.

(b) For the purpose of carrying out his investigative duties under the Act, the Secretary of Labor may, by agreement, use with or without reimbursement the services, personnel, and facilities of any State or Federal agency. Any agreements with States under this section shall be similar to those provided for under the Walsh-Healey Public Contracts Act under 41 CFR Part 50-205.

§ 1926.4 - Rules of practice for administrative adjudications for enforcement of safety and health standards.
(a) The rules of practice for administrative adjudications for the enforcement of the safety and health standards contained in Subpart C of this part and the following subparts shall be the same as those published in Part 6 of this title with respect to safety and health violations of the Service Contract Act of 1965 (69 Stat. 1035), except as provided in paragraph (b) of this section.

(b) In the case of debarment, the findings required by section 107(d) of the Act shall be made by the hearing examiner or the Assistant Secretary of Labor for Occupational Safety and Health, as the case may be. Whenever, as provided in section 107(d)(2), a contractor requests termination of debarment before the end of the 3-year period prescribed in that section, the request shall be filed in writing with the Assistant Secretary of Labor for Occupational Safety and Health who shall publish a notice in the FEDERAL REGISTER that the request has been received and afford interested persons an opportunity to be heard upon the request, and thereafter the provisions of Part 6 of this title shall apply with respect to prehearing conferences, hearings and related matters, and decisions and orders.

Subpart B - General
Interpretations


§ 1926.10 - Scope of subpart.
(a) This subpart contains the general rules of the Secretary of Labor interpreting and applying the construction safety and health provisions of section 107 of the Contract Work Hours and Safety Standards Act (83 Stat. 96). Section 107 requires as a condition of each contract which is entered into under legislation subject to Reorganization Plan Number 14 of 1950 (64 Stat. 1267), and which is for construction, alteration, and/or repair, including painting and decorating, that no contractor or subcontractor contracting for any part of the contract work shall require any laborer or mechanic employed in the performance of the contract to work in surroundings or under working conditions which are unsanitary, hazardous, or dangerous to his health or safety, as determined under construction safety and health standards promulgated by the Secretary by regulation.

§ 1926.11 - Coverage under section 103 of the act distinguished.
(a) Coverage under section 103. It is important to note that the coverage of section 107 differs from that for the overtime requirements of the Contract Work Hours and Safety Standards Act. The application of the overtime requirements is governed by section 103, which subject to specific exemptions, includes:

(1) Federal contracts requiring or involving the employment of laborers or mechanics (thus including, but not limited to, contracts for construction), and

(2) contracts assisted in whole or in part by Federal loans, grants, or guarantees under any statute "providing wage standards for such work." The statutes "providing wage standards for such work" include statutes for construction which require the payment of minimum wages in accordance with prevailing wage findings by the Secretary of Labor in accordance with the Davis-Bacon Act. A provision to section 103 excludes from the overtime requirements work where the Federal assistance is only in the form of a loan guarantee or insurance.

(b) Coverage under section 107. To be covered by section 107 of the Contract Work Hours and Safety Standards Act, a contract must be one which

(1) is entered into under a statute that is subject to Reorganization Plan No. 14 of 1950 (64 Stat. 1267); and

(2) is for "construction, alteration, and/or repair, including painting and decorating."

§ 1926.13 - Interpretation of statutory terms.
(a) The terms construction, alteration, and repair used in section 107 of the Act are also used in section 1 of the Davis-Bacon Act (40 U.S.C. 276a), providing minimum wage protection on Federal construction contracts, and section 1 of the Miller Act (40 U.S.C. 270a), providing performance and payment bond protection on Federal construction contracts. Similarly, the terms contractor and subcontractor are used in those statutes, as well as in Copeland (Anti-Kickback) Act (40 U.S.C. 276c) and the Contract Work Hours and Safety Standards Act itself, which apply concurrently with the Miller Act and the Davis-Bacon Act on Federal construction contracts and also apply to most federally assisted construction contracts. The use of the same or identical terms in these statutes which apply concurrently with section 107 of the Act have considerable precedential value in ascertaining the coverage of section 107.

(b) It should be noted that section 1 of the Davis-Bacon Act limits minimum wage protection to laborers and mechanics "employed directly" upon the "site of the work." There is no comparable limitation in section 107 of the Act. Section 107 expressly requires as a self-executing condition of each covered contract that no contractor or subcontractor shall require "any laborer or mechanic employed in the performance of the contract to work in surroundings or under working conditions which are unsanitary, hazardous, or dangerous to his health or safety" as these health and safety standards are applied in the rules of the Secretary of Labor.

(c) The term subcontractor under section 107 is considered to mean a person who agrees to perform any part of the labor or material requirements of a contract for construction, alteration or repair. Cf. MacEvoy Co. v. United States, 322 U.S. 102, 108-9 (1944). A person who undertakes to perform a portion of a contract involving the furnishing of supplies or materials will be considered a "subcontractor" under this part and section 107 if the work in question involves the performance of construction work and is to be performed:

(1) Directly on or near the construction site, or

(2) by the employer for the specific project on a customized basis. Thus, a supplier of materials which will become an integral part of the construction is a "subcontractor" if the supplier fabricates or assembles the goods or materials in question specifically for the construction project and the work involved may be said to be construction activity. If the goods or materials in question are ordinarily sold to other customers from regular inventory, the supplier is not a "subcontractor." Generally, the furnishing of prestressed concrete beams and prestressed structural steel would be considered manufacturing; therefore a supplier of such materials would not be considered a "subcontractor." An example of material supplied "for the specific project on a customized basis" as that phrase is used in this section would be ventilating ducts, fabricated in a shop away from the construction job site and specifically cut for the project according to design specifications. On the other hand, if a contractor buys standard size nails from a foundry, the foundry would not be a covered "subcontractor." Ordinarily a contract for the supplying of construction equipment to a contractor would not, in and of itself, be considered a "subcontractor" for purposes of this part.

§ 1926.14 - Federal contract for "mixed" types of performance.
(a) It is the intent of the Congress to provide safety and health protection of Federal, federally financed, or federally assisted construction. See, for example, H. Report No. 91-241, 91st Cong., first session, p. 1 (1969). Thus, it is clear that when a Federal contract calls for mixed types of performance, such as both manufacturing and construction, section 107 would apply to the construction. By its express terms, section 107 applies to a contract which is "for construction, alteration, and/or repair." Such a contract is not required to be exclusively for such services. The application of the section is not limited to contracts which permit an overall characterization as "construction contracts." The text of section 107 is not so limited.

(b) When the mixed types of performances include both construction and manufacturing, see also 1926.15(b) concerning the relationship between the Walsh-Healey Public Contracts Act and section 107.

§ 1926.15 - Relationship to the Service Contract Act; Walsh-Healey Public Contracts Act.
(a) A contract for "construction" is one for nonpersonal service. See, e.g., 41 CFR 1-1.208. Section 2(e) of the Service Contract Act of 1965 requires as a condition of every Federal contract (and bid specification therefor) exceeding $2,500, the "principal purpose" of which is to furnish services to the United States through the use of "service employees," that certain safety and health standards be met. See 29 CFR Part 1925, which contains the Department rules concerning these standards. Section 7 of the Service Contract Act provides that the Act shall not apply to "any contract of the United States or District of Columbia for construction, alteration, and/or repair, including painting and decorating of public buildings or public works." It is clear from the legislative history of section 107 that no gaps in coverage between the two statutes are intended.

(b) The Walsh-Healey Public Contracts Act requires that contracts entered into by any Federal agency for the manufacture or furnishing of materials, supplies, articles, and equipment in any amount exceeding $10,000 must contain, among other provisions, a requirement that "no part of such contract will be performed nor will any of the materials, supplies, articles or equipment to be manufactured or furnished under said contract be manufactured or fabricated in any plants, factories, buildings, or surroundings or under working conditions which are unsanitary or hazardous or dangerous to the health and safety of employees engaged in the performance of said contract." The rules of the Secretary concerning these standards are published in 41 CFR Part 50-204, and express the Secretary of Labor's interpretation and application of section 1(e) of the Walsh-Healey Public Contracts Act to certain particular working conditions. None of the described working conditions are intended to deal with construction activities, although such activities may conceivably be a part of a contract which is subject to the Walsh-Healey Public Contracts Act. Nevertheless, such activities remain subject to the general statutory duty prescribed by section 1(e). Section 103(b) of the Contract Work Hours and Safety Standards Act provides, among other things, that the Act shall not apply to any work required to be done in accordance with the provisions of the Walsh-Healey Public Contracts Act.

§ 1926.16 - Rules of construction.

(a) The prime contractor and any subcontractors may make their own arrangements with respect to obligations which might be more appropriately treated on a jobsite basis rather than individually. Thus, for example, the prime contractor and his subcontractors may wish to make an express agreement that the prime contractor or one of the subcontractors will provide all required first-aid or toilet facilities, thus relieving the subcontractors from the actual, but not any legal, responsibility (or, as the case may be, relieving the other subcontractors from this responsibility). In no case shall the prime contractor be relieved of overall responsibility for compliance with the requirements of this part for all work to be performed under the contract.

(b) By contracting for full performance of a contract subject to section 107 of the Act, the prime contractor assumes all obligations prescribed as employer obligations under the standards contained in this part, whether or not he subcontracts any part of the work.

(c) To the extent that a subcontractor of any tier agrees to perform any part of the contract, he also assumes responsibility for complying with the standards in this part with respect to that part. Thus, the prime contractor assumes the entire responsibility under the contract and the subcontractor assumes responsibility with respect to his portion of the work. With respect to subcontracted work, the prime contractor and any subcontractor or subcontractors shall be deemed to have joint responsibility.

(d) Where joint responsibility exists, both the prime contractor and his subcontractor or subcontractors, regardless of tier, shall be considered subject to the enforcement provisions of the Act.

Subpart C - General Safety
and Health Provisions


§ 1926.20 - General safety and health provisions.

(a) Contractor requirements.

(a)(1) Section 107 of the Act requires that it shall be a condition of each contract which is entered into under legislation subject to Reorganization Plan Number 14 of 1950 (64 Stat. 1267), as defined in 1926.12, and is for construction, alteration, and/or repair, including painting and decorating, that no contractor or subcontractor for any part of the contract work shall require any laborer or mechanic employed in the performance of the contract to work in surroundings or under working conditions which are unsanitary, hazardous, or dangerous to his health or safety.

(b) Accident prevention responsibilities.

(b)(1) It shall be the responsibility of the employer to initiate and maintain such programs as may be necessary to comply with this part.

(b)(2) Such programs shall provide for frequent and regular inspections of the job sites, materials, and equipment to be made by competent persons designated by the employers.

(b)(3) The use of any machinery, tool, material, or equipment which is not in compliance with any applicable requirement of this part is prohibited. Such machine, tool, material, or equipment shall either be identified as unsafe by tagging or locking the controls to render them inoperable or shall be physically removed from its place of operation.

(b)(4) The employer shall permit only those employees qualified by training or experience to operate equipment and machinery.

(c) The standards contained in this part shall apply with respect to employments performed in a workplace in a State, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, American Samoa, Guam, Trust Territory of the Pacific Islands, Wake Island, Outer Continental Shelf lands defined in the Outer Continental Shelf Lands Act, Johnston Island, and the Canal Zone.

(d)(1) If a particular standard is specifically applicable to a condition, practice, means, method, operation, or process, it shall prevail over any different general standard which might otherwise be applicable to the same condition, practice, means, method, operation, or process.

(d)(2) On the other hand, any standard shall apply according to its terms to any employment and place of employment in any industry, even though particular standards are also prescribed for the industry to the extent that none of such particular standards applies.

(e) In the event a standard protects on its face a class of persons larger than employees, the standard shall be applicable under this part only to employees and their employment and places of employment.

§ 1926.21 - Safety training and education.

(a) General requirements. The Secretary shall, pursuant to section 107(f) of the Act, establish and supervise programs for the education and training of employers and employees in the recognition, avoidance and prevention of unsafe conditions in employments covered by the act.

(b) Employer responsibility.

(b)(1) The employer should avail himself of the safety and health training programs the Secretary provides.

(b)(2) The employer shall instruct each employee in the recognition and avoidance of unsafe conditions and the regulations applicable to his work environment to control or eliminate any hazards or other exposure to illness or injury.

(b)(3) Employees required to handle or use poisons, caustics, and other harmful substances shall be instructed regarding the safe handling and use, and be made aware of the potential hazards, personal hygiene, and personal protective measures required.

(b)(4) In job site areas where harmful plants or animals are present, employees who may be exposed shall be instructed regarding the potential hazards, and how to avoid injury, and the first aid procedures to be used in the event of injury.

(b)(5) Employees required to handle or use flammable liquids, gases, or toxic materials shall be instructed in the safe handling and use of these materials and made aware of the specific requirements contained in Subparts D, F, and other applicable subparts of this part.

(b)(6)(i) All employees required to enter into confined or enclosed spaces shall be instructed as to the nature of the hazards involved, the necessary precautions to be taken, and in the use of protective and emergency equipment required. The employer shall comply with any specific regulations that apply to work in dangerous or potentially dangerous areas.

(b)(6)(ii) For purposes of paragraph (b)(6)(i) of this section, confined or enclosed space means any space having a limited means of egress, which is subject to the accumulation of toxic or flammable contaminants or has an oxygen deficient atmosphere. Confined or enclosed spaces include, but are not limited to, storage tanks, process vessels, bins, boilers, ventilation or exhaust ducts, sewers, underground utility vaults, tunnels, pipelines, and open top spaces more than 4 feet in depth such as pits, tubs, vaults, and vessels.

§ 1926.23 - First aid and medical attention.

First aid services and provisions for medical care shall be made available by the employer for every employee covered by these regulations. Regulations prescribing specific requirements for first aid, medical attention, and emergency facilities are contained in Subpart D of this part.

§ 1926.24 - Fire protection and prevention.

The employer shall be responsible for the development and maintenance of an effective fire protection and prevention program at the job site throughout all phases of the construction, repair, alteration, or demolition work. The employer shall ensure the availability of the fire protection and suppression equipment required by Subpart F of this part.

§ 1926.25 - Housekeeping.

(a) During the course of construction, alteration, or repairs, form and scrap lumber with protruding nails, and all other debris, shall be kept cleared from work areas, passageways, and stairs, in and around buildings or other structures.

(b) Combustible scrap and debris shall be removed at regular intervals during the course of construction. Safe means shall be provided to facilitate such removal.

(c) Containers shall be provided for the collection and separation of waste, trash, oily and used rags, and other refuse. Containers used for garbage and other oily, flammable, or hazardous wastes, such as caustics, acids, harmful dusts, etc. shall be equipped with covers. Garbage and other waste shall be disposed of at frequent and regular intervals.

§ 1926.26 - Illumination.

Construction areas, aisles, stairs, ramps, runways, corridors, offices, shops, and storage areas where work is in progress shall be lighted with either natural or artificial illumination. The minimum illumination requirements for work areas are contained in Subpart D of this part.

§ 1926.27 - Sanitation.

Health and sanitation requirements for drinking water are contained in Subpart D of this part.

§ 1926.28 - Personal protective equipment.

(a) The employer is responsible for requiring the wearing of appropriate personal protective equipment in all operations where there is an exposure to hazardous conditions or where this part indicates the need for using such equipment to reduce the hazards to the employees.

(b) Regulations governing the use, selection, and maintenance of personal protective and lifesaving equipment are described under Subpart E of this part.

§ 1926.31 - Incorporation by reference.

(a) The specifications, standards and codes of agencies of the U.S. Government and organizations which are not agencies of the U.S. Government, to the extent they are legally incorporated by reference in this part, have the same force and effect as other standards in this part. The locations where these specifications, standards, and codes may be examined are as follows:

(1) Offices of the Occupational Safety and Health Administration, U.S. Department of Labor, Frances Perkins Building, Washington, DC. 20210.

(2) The Regional and Field Offices of the Occupational Safety and Health Administration, which are listed in the U.S. Government Manual.

(b) Any changes in the specifications, standards and codes incorporated by reference in this part and an official historic file of such changes are available at the offices referred to in paragraph (a) of this section. All questions as to the applicability of such changes should also be referred to these offices.

§ 1926.32 - Definitions.

The following definitions shall apply in the application of the regulations in this part:

(a) Act means section 107 of the Contract Work Hours and Safety Standards Act, commonly known as the Construction Safety Act (86 Stat. 96; 40 U.S.C. 333).

(b) ANSI means American National Standards Institute.

(c) Approved means sanctioned, endorsed, accredited, certified, or accepted as satisfactory by a duly constituted and nationally recognized authority or agency.

(d) Authorized person means a person approved or assigned by the employer to perform a specific type of duty or duties or to be at a specific location or locations at the jobsite.

(e) Administration means the Occupational Safety and Health Administration.

(f) Competent person means one who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them.

(g) Construction work. For purposes of this section, "Construction work" means work for construction, alteration, and/or repair, including painting and decorating.

(h) Defect means any characteristic or condition which tends to weaken or reduce the strength of the tool, object, or structure of which it is a part.

(i) Designated person means "authorized person" as defined in paragraph (d) of this section.

(j) Employee means every laborer or mechanic under the Act regardless of the contractual relationship which may be alleged to exist between the laborer and mechanic and the contractor or subcontractor who engaged him. "Laborer and mechanic" are not defined in the Act, but the identical terms are used in the Davis-Bacon Act (40 U.S.C. 276a), which provides for minimum wage protection on Federal and federally assisted construction contracts. The use of the same term in a statute which often applies concurrently with section 107 of the Act has considerable presidential value in ascertaining the meaning of "laborer and mechanic" as used in the Act. Laborer generally means one who performs manual labor or who labors at an occupation requiring physical strength; mechanic generally means a worker skilled with tools. See 18 Comp. Gen. 341.

(k) Employer means contractor or subcontractor within the meaning of the Act and of this part.

(l) Hazardous substance means a substance which, by reason of being explosive, flammable, poisonous, corrosive, oxidizing, irritating, or otherwise harmful, is likely to cause death or injury.

(m) Qualified means one who, by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated his ability to solve or resolve problems relating to the subject matter, the work, or the project.

(n) Safety factor means the ratio of the ultimate breaking strength of a member or piece of material or equipment to the actual working stress or safe load when in use.

(o) Secretary means the Secretary of Labor.

(p) SAE means Society of Automotive Engineers.

(q) Shall means mandatory.

(r) Should means recommended.

(s) Suitable means that which fits, and has the qualities or qualifications to meet a given purpose, occasion, condition, function, or circumstance.

§ 1926.33 - Access to employee exposure and medical records.

Note: The requirements applicable to construction work under this section are identical to those set forth at 1910.1020 of this chapter.

§ 1926.34 - Means of egress.

(a) General. In every building or structure exits shall be so arranged and maintained as to provide free and unobstructed egress from all parts of the building or structure at all times when it is occupied. No lock or fastening to prevent free escape from the inside of any building shall be installed except in mental, penal, or corrective institutions where supervisory personnel is continually on duty and effective provisions are made to remove occupants in case of fire or other emergency.

(b) Exit marking. Exits shall be marked by a readily visible sign. Access to exits shall be marked by readily visible signs in all cases where the exit or way to reach it is not immediately visible to the occupants.

(c) Maintenance and workmanship. Means of egress shall be continually maintained free of all obstructions or impediments to full instant use in the case of fire or other emergency.

Subpart D - Occupational
Health and Environmental
Controls
§ 1926.50 - Medical services and first aid.

(a) The employer shall insure the availability of medical personnel for advice and consultation on matters of occupational health.

(b) Provisions shall be made prior to commencement of the project for prompt medical attention in case of serious injury.

(c) 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.

(d)(1) First-aid supplies approved by the consulting physician shall be easily accessible when required.

(d)(2) The first-aid kit shall consist of materials approved by the consulting physician in a weatherproof container with individual sealed packages for each type of item. The contents of the first-aid kit 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.

(e) 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.

(f) The telephone numbers of the physicians, hospitals, or ambulances shall be conspicuously posted.

(g) 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.

§ 1926.51 - Sanitation.

(a) Potable water.

(a)(1) An adequate supply of potable water shall be provided in all places of employment.

(a)(2) 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.

(a)(3) 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.

(a)(4) The common drinking cup is prohibited.

(a)(5) 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.

(a)(6) Potable water means water which meets the quality standards prescribed in the U.S. Public Health Service Drinking Water Standards, published in 42 CFR part 72, or water which is approved for drinking purposes by the State or local authority having jurisdiction.

(b) Nonpotable water.

(b)(1) 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.

(b)(2) There shall be no cross-connection, open or potential, between a system furnishing potable water and a system furnishing nonpotable water.

(c) Toilets at construction jobsites.

(c)(1) 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
(f) Washing facilities.

(f)(1) 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.

(f)(2) General. Washing facilities shall be maintained in a sanitary condition.

§ 1926.52 - Occupational noise exposure.

(a) 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.

(b) 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.

TABLE D-2
Permissible Noise Exposures


Duration per Day, Hours Sound Level
dBA Slow
Response
8, 6, 4, 3, 2, 1 1/2 ,1 ,1/2 ,1/4 or less 90, 92, 95, 97, 100, 102, 105, 110, 115


(c) If the variations in noise level involve maxima at intervals of 1 second or less, it is to be considered continuous.

(d)(1) In all cases where the sound levels exceed the values shown herein, a continuing, effective hearing conservation program shall be administered.

(d)(2)(i) 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.

(d)(2)(ii) 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. (d)(2)(iii) 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 1/4 hour. 100 db A 1/2 hour. 90 db A 1 1/2 hours. Fe = (1/4/1/2) + (1/2/2) + (1 1/2/8) 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.

(e) Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level.

§ 1926.54 - Nonionizing radiation.

(a) Only qualified and trained employees shall be assigned to install, adjust, and operate laser equipment.

(b) Proof of qualification of the laser equipment operator shall be available and in possession of the operator at all times.

(c) 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.

(d) Areas in which lasers are used shall be posted with standard laser warning placards.

(e) 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.

(f) Only mechanical or electronic means shall be used as a detector for guiding the internal alignment of the laser.

(g) The laser beam shall not be directed at employees.

(h) 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.

(i) Laser equipment shall bear a label to indicate maximum output.

(j) Employees shall not be exposed to light intensities above:

(j)(1) Direct staring: 1 micro-watt per square centimeter;

(j)(2) Incidental observing: 1 milliwatt per square centimeter;

(j)(3) Diffused reflected light: 2 1/2 watts per square centimeter.

(k) Laser unit in operation should be set up above the heads of the employees, when possible.

§ 1926.55 - Gases, vapors, fumes, dusts, and mists.
(a) 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.

(b) 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.

(c) 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.

(d) 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.

§ 1926.55 - Appendix A - Gases, vapors, fumes, dusts, and mists.
NOTE: Because of the length of the table, explanatory Footnotes applicable to all substances are given below. Footnotes specific only to a limited number of substances are also shown within the table.

Footnotes for Appendix A
2See Mineral Dusts Table.
3Use Asbestos Limit 1926.58
4See 1926.58
*The PELs are 8-hour TWAs unless otherwise noted; a (C) designation denotes a ceiling limit.
**As determined from breathing-zone air samples.
aParts of vapor or gas per million parts of contaminated air by volume at 25 degrees C and 760 torr.
bMilligrams of substance per cubic meter of air. When entry is in this column only, the value is exact; when listed with a ppm entry, it is approximate.
dThe CAS number is for information only. Enforcement is based on the substance name. For an entry covering more than one metal compound, measured as the metal, the CAS number for the metal is given - not CAS numbers for the individual compounds.
gFor sectors excluded from 1926.1128 the limit is 10 ppm TWA.
jMillions of particles per cubic foot of air, based on impinger samples counted by light-field techniques.
kThe percentage of crystalline silica in the formula is the amount determined from airborne samples, except in those instances in which other methods have been shown to be applicable.
mCovers all organic and inorganic particulates not otherwise regulated. Same as Particulates Not Otherwise Regulated.
 
The 1970 TLV uses letter designations instead of a numerical value as follows:
 
 
 
A(2)Polytetrafluoroethylene decomposition products. Because these products decompose in part by hydrolysis in alkaline solution, they can be quantitatively determined in air as fluoride to provide an index of exposure. No TLV is recommended pending determination of the toxicity of the products, but air concentrations should be minimal.
A(3)Gasoline and/or Petroleum distillates. The composition of these materials varies gratly and thus a single TLV for all types of these materials is no longer applicable. The content of benzene, other aromatics and additives should be determined to arrive at the appropriate TLV.
ESimple asphyxiants. The limiting factor is the available oxygen which shall be at least 19.5 percent and be within the requirements addressing explosion in part 1926.


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-Acetylaminofluorene; 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
Benzene g; see 1926.1128 71-43-2
Benzidine; see 1926.1110 92-87-5
p-Benzoquinone; see Quinone
Benzo a pyrene; see Coaltarpitch volatiles
Benzoyl peroxide 94-36-0 5
Benzyl chloride 100-44-7 1 5
Beryllium and beryllium compounds (as Be) 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 1910.19 106-99-0 1 ppm/5 ppm STEL
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) 1189-85-1 (C)0.1 X
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 1910.1027 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 percent Chlorine) (PCB) 53469-21-9 1 X
Chlorodiphenyl (54 percent Chlorine) (PCB) 11097-69-1 0.5 X
1-Chloro-2, 3-epoxypropane; See Epichlorohydrin
2-Chloroethanol; See Ethylene chlorohydrin
Chloroethylene; See Vinylchloride
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
Chromic acid and chromates (as CrO3) Varies with compound 0.1
Chromium (II) compounds (as Cr) 7440-47-3 0.5
Chromium (III) compounds (as Cr) 7440-47-3 0.5
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 0.15
Copper 7440-50-8
Fume (as Cu) 0.1
Dusts and mists (as Cu) 1
Corundum; see Emery
Cottondust (raw) 1
Cragherbicide (Sesone) 136-78-7
Total dust
Respirable fraction
Cresol, all isomers 1319-77-3 5 22 X
Crotonaldehyde 123-73-9
4170-30-3
2 6
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 77-78-1 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 butylketone (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-Dichlorethane
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 A(3)
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 (Methylisobutyl 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 0.2
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
Isomyl acetate 123-92-2 100 525
Isomyl 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. (Liquified 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
Methyl chloride 74-87-3 100 210
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
*Methylenechloride; see 1910.1052
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 propylketone; 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
Methyl enedianiline (MDA) 101-77-9
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
1910-42-5
2074-50-2
0.5 X
Parathion