Black lung, farmer's lung, asbestosis, silicosis... You've probably heard of these work-related respiratory diseases and know of their consequences. These are just a few of the medical conditions that result when workers breathe contaminated air. Protecting workers can be difficult, because there are so many types of contaminants and there is no single method for controlling them in all workplaces. Your workplace, like most, may contain one or more of the following hazards in the form of harmful:
If hazardous atmospheres are generated by any of the above, it must be controlled to prevent disease to workers. What makes a substance harmful depends on its toxicity, chemical state, physical form, concentration, and the period of time one is exposed. Examples include particulates, gases and vapors, and biological organisms. Harmful effects are wide ranging and may occur immediately or take years to develop.
When the oxygen concentration in normal breathing air drops below 19.5 percent by volume, the air becomes oxygen deficient - a significant concern for those who work in confined spaces. Harmful effects include impaired thinking and coordination, unconsciousness, and death.
If it is possible, be sure to first try to eliminate the hazard, or substitute a hazardous substance with a less hazardous substance, to reduce the severity of exposure. If you can eliminate the source of a hazardous atmosphere, that's the best plan. If elimination is not feasible, using material that creates a less toxic atmosphere is required.
If elimination or substitution is not possible, the next best hazard control strategy is to design or redesign equipment and machinery to isolate or reduce the sources of the hazardous atmospheres.
In fact, OSHA standards mandate that employers use engineering controls whenever possible to control occupational diseases caused by breathing contaminated air in their workplaces.
Examples of acceptable engineering controls to isolate or reduce atmospheric hazards include:
It's important to know that when effective engineering controls are not feasible, or while they are being instituted, the employer must provide appropriate respirators to protect the health of the employee and establish and maintain an effective respiratory protective program. And, the employee must use respiratory protection according to their employer's instructions and training.
The employer must develop and implement a written respiratory protection program with required worksite-specific procedures and elements for required respirator use. The program must be administered by a suitably trained program administrator. In addition, certain program elements may be required for voluntary use to prevent potential hazards associated with the use of the respirator.
OSHA's CPL 02-02-054 - Respiratory Protection Program Guidelines will give you insight into the OSHA inspection protocol for respiratory protection. Design your own audits with these strategies in mind.
You can't just hand out respirators and expect employees to use them properly. If respirators are necessary to protect your employees, you must have a written program that describes how you will accomplish the following:
These are the critical elements of a respiratory protection program. An effective program ensures that employees are medically able to use respirators, that their respirators fit properly, and that they know how to use and care for them.
Respiratory protection is no better than the respirator in use, even though it is worn correctly. Frequent random inspections must be conducted by a qualified individual to assure that respirators are properly selected, used, cleaned, and maintained.
Follow the important points below when inspecting respirators.
Inspecting the work area: Make sure appropriate surveillance of work area conditions and degree of employee exposure or stress is conducted.
Inspecting the program: Regularly inspect and evaluate the program to determine its continued effectiveness.
For an effective respirator program, it's essential that supervisors and workers be properly instructed by a competent person in:
In your initial and annual respirator training, be sure to include both an educational component and a training component. The educational component increases the learner's understanding of the importance of using respirators. The training component establishes or improves the skills needed to use the respirator.
Make sure students wear the respirator in normal air for a long familiarity period and then in a test atmosphere.
It's important to select and provide an appropriate respirator based on the respiratory hazard(s) to which the worker is exposed, and workplace and user factors that affect respirator performance and reliability. The employer must select a NIOSH-certified respirator. The respirator must be used in compliance with the conditions of its certification.
The employer must identify and evaluate the respiratory hazard(s) in the workplace. This evaluation must include a reasonable estimate of employee exposures to respiratory hazard(s) and an identification of the contaminant's chemical state and physical form.
Where the employer cannot identify or reasonably estimate the employee exposure, the employer must consider the atmosphere to be Immediately Dangerous to Life or Health (IDLH). Immediately dangerous to life or health means an atmosphere that poses an immediate threat to life, would cause irreversible adverse health effects, or would impair an individual's ability to escape from a dangerous atmosphere.
The employer must select respirators from a sufficient number of respirator models and sizes so that the respirator is acceptable to and correctly fits the user.
The employer must provide the following respirators for employee use in IDLH atmospheres:
Respirators provided only for escape from IDLH atmospheres must be NIOSH-certified for escape from the atmosphere in which they will be used. All oxygen-deficient atmospheres must be considered IDLH.
Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II of the standard (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used.
|Altitude (ft)||Oxygen deficient atmospheres (%O2) for which the employer atmosphere may rely on supplying respirators|
|Less than 3,001||16.0 - 19.5|
|3,0001 - 4,000||16.4 - 19.5|
|4,001 - 5,000||17.1 - 19.5|
|5,001 - 6,000||17.8 - 19.5|
|6,001 - 7,000||18.5 - 19.5|
|7,001 - 8,000*||19.3 - 19.5|
*Above 8,000 feet the exception does not apply. Oxygen-enriched breathing air must be supplied above 14,000 feet.
The employer must provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations.
The respirator selected must be appropriate for the chemical state and physical form of the contaminant.
For protection against gases and vapors, the employer must provide an atmosphere-supplying respirator, or an air-purifying respirator, provided that:
For protection against particulates, the employer must provide:
Written procedures: It's important to develop standard procedures for respirator use. These should include all information and guidance necessary for their proper selection, use, and care. Also include possible emergency and routine uses of respirators.
Physical ability to use: Make sure employees are not assigned to tasks requiring respirators unless they are physically able to adequately perform the work and use the equipment. If there is any question or concern about using the respirator, a local physician must determine what health and physical conditions are pertinent. In such cases, periodically review the respirator user's medical status.
Face seal: Do not wear respirators when conditions prevent a good face seal. Such conditions may be a growth of beard, sideburns, a skull cap that projects under the facepiece, or temple pieces on glasses. Also, the absence of one or both dentures can seriously affect the fit of a facepiece. It's important to conduct periodic evaluation of worker compliance with this requirement. To assure proper protection, the facepiece fit must be checked by the wearer, using the manufacturer's facepiece fittings instructions, each time he or she puts on the respirator.
Using corrective lenses: Providing respiratory protection for individuals wearing corrective glasses is a serious problem. A proper seal is impossible if the temple bars of eye glasses extend through the sealing edge of the full facepiece. As a temporary measure, taping glasses with short temple bars or without temple bars to the wearer's head is acceptable. Systems have been developed for mounting corrective lenses inside full facepieces. When a worker must wear corrective lenses as part of the facepiece, the facepiece and lenses must be fitted by qualified individuals to provide good vision, comfort, and a gas-tight seal.
If corrective spectacles or goggles are required, they must not affect the fit of the facepiece. Proper selection of equipment is important to avoid this problem.
Using contact lenses: OSHA Technical Manual states that OSHA's current standard on respiratory protection, unlike the previous one, allows the use of contact lenses with respirators where the wearer has successfully worn such lenses before.
Equipment must be properly maintained to retain its original effectiveness.
Respirators must be regularly cleaned and disinfected. Those used by more than one worker must be thoroughly cleaned and disinfected after each use.
Respirators must be stored in a convenient, clean, and sanitary location. A program for maintenance and care of respirators must be adjusted to the type of plant, working conditions, and hazards involved, and must include the following basic services:
Routinely used respirators must be collected, cleaned, and disinfected as frequently as necessary to ensure that proper protection is provided for the wearer. Respirators maintained for emergency use must be cleaned and disinfected after each use.
Replacement or repairs must be done only by experienced persons with parts designed for the respirator. No attempt must be made to replace components or to make adjustments or repairs beyond the manufacturer's recommendations. Reducing or admission valves or regulators must be returned to the manufacturer or to a trained technician for adjustment or repair.
After inspection, cleaning, and necessary repair, respirators must be stored to protect against dust, sunlight, heat, extreme cold, excessive moisture, or damaging chemicals. Respirators placed at stations and work areas for emergency use should be quickly accessible at all times and should be stored in compartments built for the purpose. The compartments should be clearly marked. Routinely used respirators, such as dust respirators, may be placed in plastic bags. Respirators should not be stored in such places as lockers or tool boxes unless they are in carrying cases or cartons.
Respirators should be packed or stored so that the facepiece and exhalation valve will rest in a normal position and function will not be impaired by the elastomer setting in an abnormal position.
In areas where the wearer, with failure of the respirator, could be overcome by a toxic or oxygen-deficient atmosphere, at least one additional person must be present. Communications (visual, voice, or signal line) must be maintained between both or all individuals present. Planning must be such that one individual will be unaffected by any likely incident and have the proper rescue equipment to be able to assist the other(s) in case of emergency.
When self-contained breathing apparatus or hose masks with blowers are used in atmospheres immediately dangerous to life or health, standby persons must be present with suitable rescue equipment.
Persons using air line respirators in atmospheres immediately hazardous to life or health must be equipped with safety harnesses and safety lines for lifting or removing persons from hazardous atmospheres or other and equivalent provisions for the rescue of persons from hazardous atmospheres must be used. A standby person or persons with suitable self-contained breathing apparatus must be at the nearest fresh air base for emergency rescue.
Using a respirator may place a physiological burden on employees that varies with the type of respirator worn, the job and workplace conditions in which the respirator is used, and the medical status of the employee.
The employer must provide a medical evaluation to determine the employee's ability to use a respirator, before the employee is fit tested or required to use the respirator in the workplace. The employer may discontinue an employee's medical evaluations when the employee is no longer required to use a respirator.
The employer must identify a physician or other licensed health care professional (PLHCP) to perform medical evaluations using a medical questionnaire or an initial medical examination that obtains the same information as the medical questionnaire.
The medical evaluation must obtain the information requested by the questionnaire in Sections 1 and 2, Part A of Appendix C of the standard.
The employer must ensure that a follow-up medical examination is provided for an employee who gives a positive response to any question among questions 1 through 8 in Section 2, Part A of Appendix C of the standard or whose initial medical examination demonstrates the need for a follow-up medical examination.
The follow-up medical examination must include any medical tests, consultations, or diagnostic procedures that the PLHCP deems necessary to make a final determination.
In determining the employee's ability to use a respirator, the employer must obtain a written recommendation regarding the employee's ability to use the respirator from the PLHCP. The recommendation must provide only the following information:
If the respirator is a negative pressure respirator and the PLHCP finds a medical condition that may place the employee's health at increased risk if the respirator is used, the employer must provide a Positive Air Pressure Respirator (PAPR) if the PLHCP's medical evaluation finds that the employee can use such a respirator; if a subsequent medical evaluation finds that the employee is medically able to use a negative pressure respirator, then the employer is no longer required to provide a PAPR.
At a minimum, the employer must provide additional medical evaluations that comply with the requirements of this section if:
The employer must ensure that all filters, cartridges and canisters used in the workplace are labeled and color coded with the NIOSH approval label and that the label is not removed and remains legible.
An employer may provide respirators at the request of employees or permit employees to use their own respirators, if the employer determines that such respirator use will not in itself create a hazard.
If the employer determines that any voluntary respirator use is permissible, the employer must provide the respirator users with the information contained in Appendix D of the standard.
In addition, the employer must establish and implement those elements of a written respiratory protection program necessary to ensure that any employee using a respirator voluntarily is medically able to use that respirator, and that the respirator is cleaned, stored, and maintained so that its use does not present a health hazard to the user. Exception: Employers are not required to include in a written respiratory protection program those employees whose only use of respirators involves the voluntary use of filtering facepieces (dust masks).
OK, that was a lot of information. Remember this was only a brief overview of respirator use. In the next module, we'll be taking a look at requirements for head, hand, and foot personal protective equipment. Well, it's time for the review quiz, so let's do it!
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