- Part Number:1910
- Part Number Title:Occupational Safety and Health Standards
- Subpart:1910 Subpart Z
- Subpart Title:Toxic and Hazardous Substances
- Standard Number:
- GPO Source:
Scope and application.
Definitions: For the purpose of this section, the following definitions shall apply:
Action level means a concentration of airborne BD of 0.5 ppm calculated as an eight (8)-hour time-weighted average.
Assistant Secretary means the Assistant Secretary of Labor for Occupational Safety and Health, U.S. Department of Labor, or designee.
Authorized person means any person specifically designated by the employer, whose duties require entrance into a regulated area, or a person entering such an area as a designated representative of employees to exercise the right to observe monitoring and measuring procedures under paragraph (d)(8) of this section, or a person designated under the Act or regulations issued under the Act to enter a regulated area.
1,3-Butadiene means an organic compound with chemical formula CH2 = CH-CH = CH2 that has a molecular weight of approximately 54.15 gm/mole.
Business day means any Monday through Friday, except those days designated as federal, state, local or company specific holidays.
Complete Blood Count (CBC) means laboratory tests performed on whole blood specimens and includes the following: White blood cell count (WBC), hematocrit (Hct), red blood cell count (RBC), hemoglobin (Hgb), differential count of white blood cells, red blood cell morphology, red blood cell indices, and platelet count.
Day means any part of a calendar day.
Director means the Director of the National Institute for Occupational Safety and Health (NIOSH), U.S. Department of Health and Human Services, or designee.
Emergency situation means any occurrence such as, but not limited to, equipment failure, rupture of containers, or failure of control equipment that may or does result in an uncontrolled significant release of BD.
Employee exposure means exposure of a worker to airborne concentrations of BD which would occur if the employee were not using respiratory protective equipment.
Objective data means monitoring data, or mathematical modelling or calculations based on composition, chemical and physical properties of a material, stream or product.
Permissible Exposure Limits, PELs means either the 8 hour Time Weighted Average (8-hr TWA) exposure or the Short-Term Exposure Limit (STEL).
Physician or other licensed health care professional is an individual whose legally permitted scope of practice (i.e., license, registration, or certification) allows him or her to independently provide or be delegated the responsibility to provide one or more of the specific health care services required by paragraph (k) of this section.
Regulated area means any area where airborne concentrations of BD exceed or can reasonably be expected to exceed the 8-hour time weighted average (8-hr TWA) exposure of 1 ppm or the short-term exposure limit (STEL) of 5 ppm for 15 minutes.
This section means this 1,3-butadiene standard.
Permissible exposure limits (PELs) -
Time-weighted average (TWA) limit. The employer shall ensure that no employee is exposed to an airborne concentration of BD in excess of one (1) part BD per million parts of air (ppm) measured as an eight (8)-hour time-weighted average.
Short-term exposure limit (STEL). The employer shall ensure that no employee is exposed to an airborne concentration of BD in excess of five parts of BD per million parts of air (5 ppm) as determined over a sampling period of fifteen (15) minutes.
Exposure monitoring -
Periodic monitoring and its frequency.
Termination of monitoring.
Accuracy of monitoring. Monitoring shall be accurate, at a confidence level of 95 percent, to within plus or minus 25 percent for airborne concentrations of BD at or above the 1 ppm TWA limit and to within plus or minus 35 percent for airborne concentrations of BD at or above the action level of 0.5 ppm and below the 1 ppm TWA limit.
Employee notification of monitoring results.
Observation of monitoring -
Employee observation. The employer shall provide affected employees or their designated representatives an opportunity to observe any monitoring of employee exposure to BD conducted in accordance with paragraph (d) of this section.
Observation procedures. When observation of the monitoring of employee exposure to BD requires entry into an area where the use of protective clothing or equipment is required, the employer shall provide the observer at no cost with protective clothing and equipment, and shall ensure that the observer uses this equipment and complies with all other applicable safety and health procedures.
Methods of compliance -
Engineering controls and work practices.
Exposure Goal Program.
Respiratory protection -
The employer must select appropriate respirators from Table 1 of this section.
|Concentration of airborne BD (ppm) or condition of use||Minimum required respirator|
|Less than or equal to 5 ppm (5 times PEL)||(a) Air-purifying half mask or full facepiece respirator equipped with approved BD or organic vapor cartridges or canisters. Cartridges or canisters shall be replaced every 4 hours.|
|Less than or equal to 10 ppm (10 times PEL)||(a) Air-purifying half mask or full facepiece respirator equipped with approved BD or organic vapor cartridges or canisters. Cartridges or canisters shall be replaced every 3 hours.|
|Less than or equal to 25 ppm (25 times PEL)||(a) Air-purifying full facepiece respirator equipped with approved BD or organic vapor cartridges or canisters. Cartridges or canisters shall be replaced every 2 hours.|
|(b) Any powered air-purifying respirator equipped with approved BD or organic vapor cartridges. PAPR cartridges shall be replaced every 2 hours.|
|(c) Continuous flow supplied air respirator equipped with a hood or helmet.|
|Less than or equal to 50 ppm (50 times PEL)||(a) Air-purifying full facepiece respirator equipped with approved BD or organic vapor cartridges or canisters. Cartridges or canisters shall be replaced every (1) hour.|
|(b) Powered air-purifying respirator equipped with a tight-fitting facepiece and an approved BD or organic vapor cartridges. PAPR cartridges shall be replaced every (1) hour.|
|Less than or equal to 1,000 ppm (1,000 times PEL)||(a) Supplied air respirator equipped with a half mask of full facepiece and operated in a pressure demand or other positive pressure mode.|
|Greater than 1000 ppm unknown concentration, or firefighting||(a) Self-contained breathing apparatus equipped with a full facepiece and operated in a pressure demand or other positive pressure mode.|
|(b) Any supplied air respirator equipped with a full facepiece and operated in a pressure demand or other positive pressure mode in combination with an auxiliary self-contained breathing apparatus operated in a pressure demand or other positive pressure mode.|
|Escape from IDLH conditions||(a) Any positive pressure self-contained breathing apparatus with an appropriate service life.|
|(b) A air-purifying full facepiece respirator equipped with a front or back mounted BD or organic vapor canister.|
NOTES: Respirators approved for use in higher concentrations are permitted to be used in lower concentrations. Full facepiece is required when eye irritation is anticipated.
Protective clothing and equipment. Where appropriate to prevent eye contact and limit dermal exposure to BD, the employer shall provide protective clothing and equipment at no cost to the employee and shall ensure its use. Eye and face protection shall meet the requirements of 29 CFR 1910.133.
Emergency situations. Written plan. A written plan for emergency situations shall be developed, or an existing plan shall be modified, to contain the applicable elements specified in 29 CFR 1910.38 and 29 CFR 1910.39, "Emergency action plans" and "Fire prevention plans," respectively, and in 29 CFR 1910.120, "Hazardous Waste Operations and Emergency Response," for each workplace where there is the possibility of an emergency.
Medical screening and surveillance -
Employees covered. The employer shall institute a medical screening and surveillance program as specified in this paragraph for:
Frequency of medical screening activities. The employer shall make medical screening available on the following schedule:
For each employee covered under paragraphs (j)(1) (i)-(ii) of this section, a health questionnaire and complete blood count with differential and platelet count (CBC) every year, and a physical examination as specified below:
Content of medical screening.
Medical screening for employees covered by paragraphs (j)(1) (i)-(ii) of this section shall include:
A baseline health questionnaire that includes a comprehensive occupational and health history and is updated annually. Particular emphasis shall be placed on the hematopoietic and reticuloendothelial systems, including exposure to chemicals, in addition to BD, that may have an adverse effect on these systems, the presence of signs and symptoms that might be related to disorders of these systems, and any other information determined by the examining physician or other licensed health care professional to be necessary to evaluate whether the employee is at increased risk of material impairment of health from BD exposure. Health questionnaires shall consist of the sample forms in appendix C to this section, or be equivalent to those samples;
Additional medical evaluations and referrals.
Information provided to the physician or other licensed health care professional. The employer shall provide the following information to the examining physician or other licensed health care professional involved in the evaluation:
The written medical opinion.
Note: However, this provision does not negate the ethical obligation of the physician or other licensed health care professional to transmit any other adverse findings directly to the employee.
Communication of BD hazards to employees -
Hazard communication - general.
Employee information and training.
Access to information and training materials.
Objective data for exemption from initial monitoring.
Name and exposure of the employees whose exposures are represented.
Medical screening and surveillance.
The name of the employee;
Transfer of records. The employer shall transfer medical and exposure records as set forth in 29 CFR 1910.1020(h).
The employer shall transfer medical and exposure records as set forth in 29 CFR 1910.1020(h).
appendix E to this section is mandatory.
Appendices A, B, C, D, and F to this section are informational and are not intended to create any additional obligations not otherwise imposed or to detract from any existing obligations.
[61 FR 56746, Nov. 4, 1996; 63 FR 1152, Jan. 8, 1998; 67 FR 67965, Nov. 7, 2002; 70 FR 1143, Jan. 5, 2005; 71 FR 16672 and 16674, April 3, 2006; 73 FR 75586, Dec. 12, 2008; 76 FR 33609, June 8, 2011; 77 FR 17785, March 26, 2012; 78 FR 9313, Feb. 8, 2013; 84 FR 21597, May 14, 2019]