Safety Standards for Agriculture


Respirators
Chapter 296-307 WAC, Part Y-5

WAC

296-307-594 Scope.
296-307-596 Respirator program administrator.
296-307-59605 Designate a program administrator.
296-307-598 Voluntary respirator use requirements.
296-307-59805 Make sure voluntary use of respirators is safe.
296-307-59810 Keep voluntary use program records.
296-307-600 Written respirator program and recordkeeping.
296-307-60005 Develop and maintain a written program.
296-307-60010 Keep respirator program records.
296-307-602 Respirator selection.
296-307-60205 Select and provide appropriate respirators.
296-307-604 Medical evaluations.
296-307-60405 Provide medical evaluations.
296-307-606 Fit testing.
296-307-60605 Conduct fit testing.
296-307-608 Training.
296-307-60805 Provide effective training.
296-307-610 Maintenance.
296-307-61005 Maintain respirators in a clean and reliable condition.
296-307-61010 Store respirators properly.
296-307-61015 Inspect and repair respirators.
296-307-612 Safe use and removal of respirators.
296-307-61205 Prevent sealing problems with tight-fitting respirators.
296-307-61210 Make sure employees leave the use area before removing respirators.
296-307-614 Standby requirements for immediately dangerous to life of health (IDLH) conditions.
296-307-61405 Provide standby assistance in immediately dangerous to life or health (IDLH) conditions.
296-307-616 Air quality for self-contained breathing apparaatus (SCBA) and air-line respirators.
296-307-61605 Make sure breathing air and oxygen meet established specifications.
296-307-61610 Prevent conditions that could create a hazardous breathing air supply.
296-307-61615 Make sure compressors do not create a hazardous breathing air supply.
296-307-618 Labeling of air-purifying respirator filters, cartridges, and canisters.
296-307-61805 Keep labels readable on respirator filters, cartridges, and canisters.
296-307-620 Required procedures for respiratory protection program.
296-307-62005 Use this medical questionnaire for medical evaluations.
296-307-62010 Follow these fit-testing procedures for tight-fitting respirators.
296-307-62015 Follow procedures established for cleaning and disinfecting respirators.
296-307-62020 Follow procedures established for seal checking respirators.
296-307-622 Definitions.

WAC 296-307-594

Scope

This part applies to all use of respirators at work.

Important:

Before you decide to use respirators, you are required to evaluate respiratory hazards and implement control methods as outlined in WAC 296-307-624 through 296-307-628, Respiratory hazards.

The term “respiratory hazards” will be used throughout this part to refer to oxygen deficient conditions and harmful airborne hazards.

Definition:

Respirators are a type of personal protective equipment designed to protect the wearer from respiratory hazards.

You can use Table 1 for general guidance on which sections apply to you.

Table 1
Sections that apply to your workplace

If employees...

Then the sections marked with an “X” apply...
 
596
598
600
602-618
620
622

Request and are permitted to voluntarily use filtering-facepiece respirators, and are not exposed to a respiratory hazard

 
X
     
X

Request and are permitted to voluntarily use respirators that are not filtering-facepiece respirators, and are not exposed to a respiratory hazard

X
X
   
X
X

Are required to use any respirator by WISHA or the employer

X
 
X
X
X
X

Would use an escape respirator in an emergency

X
 
X
X
X
X

 

Reference: See WAC 296-307-100, Personal protective equipment (PPE) to find requirements for other types of personal protective equipment (PPE), such as eye, hand, and head protection.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-594, filed 12/21/04, effective 04/02/05.]

WAC 296-307-596

Respirator program administrator

Your responsibility:

To make sure a capable individual is in charge of respirator program development and management.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-596, filed 12/21/04, effective 04/02/05.]

WAC 296-307-59605

Designate a program administrator

Exemption: You don’t need to designate a program administrator if employees use only filtering-facepiece respirators and do so only as voluntary use.

Definition:

Voluntary use is respirator use that is requested by the employee and permitted by the employer when NO respiratory hazard exists.

You must

Designate a program administrator who has overall responsibility for your program and has sufficient training or experience to:

- Oversee program development and coordinate implementation

- Conduct required evaluations of program effectiveness outlined in WAC 296-307-60005.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-59605, filed 12/21/04, effective 04/02/05.]

WAC 296-307-598

Voluntary respirator use requirements.

Your responsibility:

To make sure voluntary use of respirators by employees doesn’t create job safety or health hazards.

You must

Make sure voluntary use of respirators is safe

WAC 296-307-59805

Keep voluntary use respirator program records

WAC 296-307-59810

Important:

  • Respirator use is NOT voluntary if a respiratory hazard, such as exposure to a substance over the permissible exposure limit (PEL) or hazardous exposure to an airborne biological hazard, is present.
  • To evaluate respiratory hazards in your workplace, see WAC 296-307-624, Respiratory hazards.
  • Some requirements in this section don’t apply if only filtering-facepiece respirators are used voluntarily. Some filtering-facepiece respirators are equipped with a sorbent layer for absorbing “nuisance” organic vapors. These can be used for voluntary use, but are not NIOSH certified for protection against hazardous concentrations of organic vapor.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-598, filed 12/21/04, effective 04/02/05.]

WAC 296-307-59805

Make sure voluntary use of respirators is safe.

Definition:

Voluntary use is respirator use that is requested by the employee AND permitted by the employer when no respiratory hazard exists.

Important:

If you choose to require respirator use, use is NOT voluntary and the required use sections of this part apply.

You must

(1) Make sure voluntary respirator use does NOT:

  • Interfere with an employee's ability to work safely, such as restricting necessary vision or radio communication

    OR

  • Create health hazards.

Note: Examples of health hazards include:

  • Skin irritation, dermatitis, or other health effects caused by using a dirty respirator
  • Illness created by sharing contaminated respirators
  • Health effects caused by use of an unsafe air supply, such as carbon monoxide poisoning.

You must

(2) Provide all voluntary respirator users with the advisory information in Table 2 at no cost to them.

Note: If you have provided employees with the advisory information required in the previous section, WAC 296-307-598, you don’t need to provide the additional information in Table 2 to those employees.

You must

(3) Develop and maintain a written program that includes the following:

  • Medical evaluation provisions as specified in WAC 296-307-604.
  • Procedures to properly clean and disinfect respirators, according to WAC 296-307-62015, if they are reused.
  • How to properly store respirators, according to WAC 296-307-61010, so that using them doesn’t create hazards.
  • Procedures to make sure there is a safe air supply, according to WAC 296-307-616, when using air-line respirators and SCBAs.
  • Training according to WAC 296-307-608 when necessary to ensure respirator use does NOT create a hazard.

Note:

  • Pay for medical evaluations, training, travel related costs, and wages. You do NOT need to pay for respirators employees use only voluntarily.
  • If you have both voluntary and required respirator users, you may choose to treat voluntary users as required users. Doing this exceeds the requirements in this section.

Exemption: If employees use only filtering-facepiece respirators and do so only voluntarily, you don’t need to develop and maintain a written program.

Use Table 2 to provide information to employees who voluntarily use any type of respirator.

Table 2

Advisory Information for Employees Who Voluntarily Use Respirators
  • Respirators protect against airborne hazards when properly selected and used. WISHA recommends voluntary use of respirators when exposure to substances is below WISHA permissible exposure limits (PELs) because respirators can provide you an additional level of comfort and protection.
  • If you choose to voluntarily use a respirator (whether it's provided by you or your employer) be aware that respirators can create hazards for you, the user. You can avoid these hazards if you know how to use your respirator properly AND how to keep it clean. Take these steps:
    • - Read and follow all instructions provided by the manufacturer about use, maintenance (cleaning and care), and warnings regarding the respirator's limitation.
    • - Choose respirators that have been certified for use to protect against the substance of concern. The National Institute for Occupational Safety and Health (NIOSH) certifies respirators. If a respirator is not certified by NIOSH, you have no guarantee that it meets miminum design and performance standards for workplace use.
      • A NIOSH approval label will appear on or in the respirator packaging. It will tell you what protection the respirator provides.
    • - Keep track of your respirator so you don't mistakenly use someone else's.
    • - DO NOT wear your respirator into:
      • Atmospheres containing hazards that your respirator isn't designed to protect against.
        For example, a respirator designed to filter dust particles won't protect you against solvent vapor, smoke or oxygen deficiency.
      • Situations where respirator use is required.
 

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-59805, filed 12/21/04, effective 04/02/05.]

WAC 296-307-59810

Keep voluntary use program records.

Exemption: If employees use only filtering-facepiece respirators voluntarily, you don’t need to follow these recordkeeping requirements.

You must

  • Keep copies of:

    - Your current written respirator program

    - Written recommendations from the LHCP

  • Allow records required by this section to be examined and copied by affected employees and their representatives.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-59810, filed 12/21/04, effective 04/02/05.]

WAC 296-307-600

Written respirator program and recordkeeping.

Your responsibility:

To develop, implement, and maintain a written program that provides clear instruction for safe and reliable respirator use.

You must

Develop and maintain a written program

WAC 296-307-60005

Keep respirator program records

WAC 296-307-60010.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-600, filed 12/21/04, effective 04/02/05.]

WAC 296-307-60005

Develop and maintain a written program.

Exemption: This section does NOT apply to respirator use that is voluntary. See WAC 296-307-59805 for voluntary use program requirements.

You must

(1) Develop a complete worksite-specific written respiratory protection program that includes the applicable elements listed in Table 3.

Note: Pay for respirators, medical evaluations, fit testing, training, maintenance, travel costs and wages.

You must

(2) Keep your program current and effective by evaluating it and making corrections. Do ALL of the following:

  • Make sure procedures and program specifications are followed and appropriate.
  • Make sure selected respirators continue to be effective in protecting employees. For example:

    - If changes in work area conditions, level of employee exposure, or employee physical stress have occurred, you need to reevaluate your respirator selection.

  • Have supervisors periodically monitor employee respirator use to make sure employees are using them properly.
  • Regularly ask employees required to use respirators about their views concerning program effectiveness and whether they have problems with:
    • - Respirator fit during use
    • - Any effects of respirator use on work performance
    • - Respirators being appropriate for the hazards encountered
    • - Proper use under current worksite conditions
    • - Proper maintenance.

When developing your written program include applicable elements listed in Table 3.

Table 3

Required Elements for Required-Use Respirator Programs
  • Selection

    - Procedures for respirator selection

    - A list specifying the appropriate respirator for each respiratory hazard in your workplace

    - Procedures for issuing the proper type of respirator, if appropriate

  • Medical evaluation provisions
  • Fit-test provisions and procedures, if tight-fitting respirators are selected
  • Training provisions that address:

    - Respiratory hazards encountered during:

    • Routine activities
    • Infrequent activities, for example, bimonthly cleaning of equipment
    • Reasonable foreseeable emergencies, for example, rescue, spill response, or escape situations
    - Proper use of respirators, for example, how to put on or remove respirators, and use limitations.

Note:

You do NOT need to repeat training on respiratory hazards if employees have been trained on this in compliance with other rules such as 296-307-550, employer chemical hazard communication.

  • Respirator use procedures for:

    - Routine activities

    - Infrequent activities

    - Reasonably foreseeable emergencies

  • Maintenance:

    - Procedures and schedules for respiratory maintenance covering:

    • Cleaning and disinfecting
    • Storage
    • Inspection and repair
    • When to discard respirators

    - A cartridge or canister change schedule IF air-purifying respirators are selected for use against gas or vapor contaminants AND and end-of-service-life-indicator (ESLI) isn't available. In addition, provide:

    • The data and other information you relied on to calculate change schedule values (for example, highest contaminant concentration estimates, duration of employee respirator use, expected maximum humidity levels, user breathing rates, and safety factors)
  • Procedures to ensure a safe air quantity and qualify IF atmosphere-supplying respirators (air-line or SCBA) are selected.
  • Procedures for evaluating program effectiveness on a regular basis.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60005, filed 12/21/04, effective 04/02/05.]

WAC 296-307-60010

Keep respirator program records.

You must

  • Keep the following records:

    - Your current respirator program

    - Each employee's current fit test record, if fit testing is conducted. Fit test records must include:

    • Employee name
    • Test date
    • Type of fit-test performed
    • Description (type, manufacturer, model, style, and size) of the respirator tested
    • Results of fit tests, for example, for quantitative fit tests include the overall fit factor AND a print out, or other recording of the test.
    - Training records that include employee's names and the dates trained
    - Written recommendations from the LHCP.
  • Allow records required by this section to be examined and copied by affected employees and their representatives.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60010, filed 12/21/04, effective 04/02/05.]

WAC 296-307-602

Respirator selection.

Your responsibility:

To select and provide respirators that are appropriate for the hazard, user, and worksite conditions.

Exemption: This section does NOT apply to voluntary respirator use. See WAC 296-307-598 of this part for voluntary use program requirements.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-602, filed 12/21/04, effective 04/02/05.]

WAC 296-307-60205

Select and provide appropriate respirators.

Important:

See WAC 296-307-624, Respiratory hazards, for:

  • Hazard evaluation requirements. Evaluation results are necessary for respirator selection.
  • A list of substance-specific rules that may also apply to you. Those listed rules have additional respirator selection requirements.

You must

  • Select and provide, at no cost to employees, appropriate respirators for routine use, infrequent use, and reasonably foreseeable emergencies (such as escape, emergency, and spill response situations) by completing the following process:

Respirator Selection Process

Step 1: If your only respirator use is for escape, skip to Step 8 to select appropriate respirators.

Step 2: If the respiratory hazard is a biological aerosol, such as TB (tuberculosis), anthrax, psittacosis (parrot fever), or hanta virus, select a respirator appropriate for nonemergency activities recognized to present a health risk to workers and skip to Step 8.

  • If respirator use will occur during emergencies, skip to Step 8 and document the analysis used to select the appropriate respirator.
  • Use Centers for Disease Control (CDC) selection guidance for exposures to specific biological agents when this guidance exists. Visit http://www.cdc.gov.

Step 3: If the respiratory hazard is a pesticide, follow the respirator specification on the pesticide label AND skip to Step 9.

Step 4: Determine the expected exposure concentration for each respiratory hazard of concern. Use the results from the evaluation required by WAC 296-307-624, Respiratory hazards.

Step 5: Determine if the respiratory hazard is classified as IDLH; if it is NOT IDLH skip to Step 7.

  • The respiratory hazard IS classified as IDLH if:

    - The atmosphere is oxygen deficient or oxygen enriched

    OR

    - You CANNOT measure or estimate your expected exposure concentration

    OR

    - Your measured or estimated expected exposure concentration is greater or equal to the IDLH value in the NIOSH Pocket Guide to Chemical Hazards

Note:

  • WISHA uses the IDLH values in the 1990 edition of the NIOSH Pocket Guide to Hazardous Chemicals to determine the existence of IDLH conditions. You may use more recent editions of this guide. Visit www.cdc.gov/niosh for more information.
  • If your measured or estimated expected exposure concentration is below NIOSH's IDLH values, proceed to Step 7.

Step 6: Select an appropriate respirator from one of the following respirators for IDLH conditions and skip to Step 8:

  • Full-facepiece, pressure demand, self-contained breathing apparatus (SCBA) certified by NIOSH for a minimum service life of thirty minutes

    OR

  • Full-facepiece, pressure demand air-line respirator equipped with an auxiliary self-contained air supply

Exception: If the respiratory hazard is oxygen deficiency AND you can show oxygen concentrations can be controlled within the ranges llisted in Table 4 under ALL foreseeable conditions, you are allowed to select ANY type of SCBA or air-line respirator.

Table 4
Concentration Ranges for Oxygen Deficiency

Altitude
(as ft. above sea level)
Oxygen Concentration Range
(as percent oxygen)
Below 3,001
16.0 - 19.5
3,001 - 4,000
16.4 - 19.5
4,001 - 5,000
17.1 - 19.5
5,001 - 6,000
17.8- 19.5
6,001 - 8,000
19.3- 19.5
Above 8,000 feet the exception doesn’t apply.

Step 7: Identify respirator types with assigned protection factors (APFs) from Table 5 that are appropriate to protect employees from the expected exposure concentration.

Step 8: Consider hazards that could require selection of specific respirator types.

For example, select full-facepiece respirators to prevent eye irritation or abrasive blasting helmets to provide particle rebound protection.

Step 9: Evaluate user and workplace factors that might compromise respirator performance, reliability or safety.

  • If the respiratory hazard is a pesticide, follow the requirements on the pesticide label and skip to Step 11.

Examples:

  • High humidity or temperature extremes in the workplace.
  • Necessary voice communication.
  • High traffic areas and moving machinery
  • Time or distance for escape.

Step 10: Follow Table 6 requirements to select an air-purifying respirator.

  • If Table 6 requirements can’t be met, you must select an air-line respirator or an SCBA.

Step 11: Make sure respirators you select are certified by the National Institute for Occupational Safety and Health (NIOSH).

  • To maintain certification, make sure the respirator is used according to cautions and limitations specified on the NIOSH approval label.

Note: While selecting respirators, you will need to select a sufficient number of types, models or sizes to provide for fit testing. You can also consider other respirator use issues, such as accommodating facial hair with a loose fitting respirator.

Use Table 5 to identify the assigned protection factor for different types of respirators

Table 5
Assigned Protection Factors (APF) for Respirator Types

If the respirator is a(n) . . .
Then the APF is . . .

Air-purifying respirator with a:

  • Half-facepiece
  • Full-facepiece

Note: Half-facepiece includes 1/4 masks, filtering facepieces, and elastomeric facepieces.

 

10

100

Powered air-purifying respirator (PAPR) with a:

  • Loose-fitting facepiece
  • Half-facepiece
  • Full-facepiece, equipped with HEPA filters, chemical cartridges or canisters
  • Hood or helmet, equipped with HEPA filters, chemical cartridges or canisters

 

25

50

1000

1000

Air-line respirator with a:

  • Half-facepiece and designed to operate in demand mode
  • Loose-fitting facepiece and designed to operate in continuous flow mode
  • Half-facepiece and designed to operate in continuous-flow, or pressure-demand mode
  • Full-facepiece and designed to operate in demand mode
  • Full-facepiece and designed to operate in continuous-flow or pressure-demand mode
  • Helmet or hood and designed to operate in continuous-flow mode

 

 

10

25

50

 

100

1000

1000

 

Self-contained breathing apparatus (SCBA) with a tight fitting:

  • Half-facepiece and designed to operate in demand mode
  • Full-facepiece and designed to operate in demand mode
  • Full-facepiece and designed to operate in pressure-demand mode

 

 

10

100

10,000

Combination respirators:

  • Find the APF for each type of respirator in the combination.
  • Use the lower APF to represent the combination.

 

The lowest value

Use Table 6 to select air-purifying respirators for particle, vapor, or gas contaminants.

Table 6
Requirements for Selecting Any Air-purifying Respirator

If the contaminant is a . . .
Then . . .
  • Gas or vapor
  • Provide a respirator with canisters or cartridges equipped with a NIOSH-certified, end-of-service-life indicator (ESLI)
    OR
  • If a canister or cartridge with an ESLI is NOT available, develop a cartridge change schedule to make sure the canisters or cartridges are replaced before they are no longer effective

    OR

  • Select an atmosphere-supplying respirator
  • Particle, such as a dust, spray, mist, fog, fume, or aerosol
  • Select respirators with filters certified to be at least 95% efficient by NIOSH
    – For example, N95s, R99s, P100s, or High Efficiency Particulate Air filters (HEPA)

OR

  • You may select respirators NIOSH certified as “dust and mist,” “dust, fume, or mist,” or “pesticides.” You can only use these respirators if particles primarily have a mass median aerodynamic diameter of at least 2 micrometers.
Note: These respirators are no longer sold for occupational use.

 

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60205, filed 12/21/04, effective 04/02/05.]

WAC 296-307-604

Medical evaluations.

Your responsibility:

To make sure a respirator used under your specific worksite conditions isn’t a health risk to employees.

Exemption: This section does NOT apply to employees who only use:

  • Filtering-facepiece respirators voluntarily. See WAC 296-307-598 of this part for voluntary use requirements

    OR

  • Escape-only respirators that are mouthpiece, loose-fitting, or hooded respirators.

Important:

  • Using a respirator can create physical risks for an employee each time it's worn. The extent of these risks depends on these factors:

    - Type of respirator

    - Environmental conditions at the worksite

    - Physical demands of the work

    - Use of other protective clothing

    - Employee's health status.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-604, filed 12/21/04, effective 04/02/05.]

WAC 296-307-60405

Provide medical evaluations.

Important:

If you have provided an employee with a medical evaluation addressing respirator use, as required by another chapter, that evaluation will meet the requirements of this section.

You must

  • Follow the medical evaluation process, Steps 1 through 7 in this section, to provide medical evaluations for employees at no cost to them.

Medical Evaluation Process

Step 1: Identify employees who need medical evaluations AND determine the frequency of evaluations from Table 7. Include employees who:

  • Are required to use respirators

    OR

  • Voluntarily use respirators that are not filtering-facepiece respirators

Note: You may use a previous employer's medical evaluation for an employee if you can:

  • Show the employee's previous work and use conditions were substantially similar to yours

    AND

  • Obtain a copy of the licensed healthcare professional's (LHCP's) written recommendation approving the employee's use of the respirator chosen by you.

Step 2: Identify a licensed healthcare professional (LHCP) to perform your medical evaluations.

Note: If you select a different LHCP, you don’t need to have new medical evaluations done.

Step 3: Make sure your LHCP has the following information before the evaluation is completed:

  • Information describing the respirators employees may use, including the weight and type.
  • How the respirators will be used, including:

    - How often the respirator will be used, for example, daily, or once a month

    - The duration of respirator use, for example, a minimum of one hour, or up to twelve hours

    - The employee's expected physical work effort

    - Additional personal protective clothing and equipment to be worn

    - Temperature and humidity extremes expected during use

  • A copy of your written respiratory protection program and this part.

Note:

  • You may choose to send the questionnaire to the LHCP ahead of time, giving time to review it and add any necessary questions
  • The LHCP determines what questions to add to the questionnaire, if any; however, questions in Parts 1-3 may not be deleted or substantially altered.

Step 4: Administer the medical questionnaire in WAC 296-307-61605 to employees, OR provide them a medical exam that obtains the same information.

Note: You may use on-line questionnaires if the questions are the same and requirements of this section are met.

  • Administer the examination or questionnaire at no cost to employees:

    - During the employee's normal working hours

    OR

    - At a time and place convenient to the employee

  • Maintain employee confidentiality during examination or questionnaire administration:
  • - Do not view employee's answers on the questionnaire

    - Do not act in a manner that may be considered a breach of confidentiality

Note: Providing confidentiality is important for securing successful medical evaluations. It helps make sure the LHCP gets complete and dependable answers on the questionnaire.

  • Make sure employees understand the content of the questionnaire.
  • Provide the employee with an opportunity to discuss the questionnaire or exam results with the LHCP.

Step 5: Provide follow-up evaluation for employees when:

  • The LHCP needs more information to make a final recommendation

    OR

  • An employee gives any positive response to questions 1-8 in Part 2 OR to questions 1-6 in Part 3 of the WISHA medical evaluation questionnaire in WAC 296-307-61605.

Note: Follow-up may include:

  • Employee consultation with the LHCP such as a telephone conversation to evaluate positive questionnaire responses
  • Medical exams
  • Medical tests or other diagnostic procedures.

Step 6: Obtain a written recommendation from the LHCP that contains only the following medical information:

  • Whether or not the employee is medically able to use the respirator
  • Any limitations of respirator use for the employee
  • What future medical evaluations, if any, are needed
  • A statement that the employee has been provided a copy of the written recommendation.

Step 7: Provide a powered, air-purifying respirator (PAPR) when the LHCP determines the employee shouldn't wear a negative-pressure air-purifying respirator AND is able to wear a PAPR.

Reference: See WAC 296-307-602 for requirements regarding selection of air-purifying respirators.

Note:

  • You may discontinue medical evaluations for an employee when the employee no longer uses a respirator.
  • If you have staff conducting your medical evaluations, they may keep completed questionnaires and findings as confidential medical records, if they are maintained separately from other records.

Use Table 7 to determine medical evaluation frequency.

Table 7
Evaluation Frequency

Type of Evaluation:
When required:
Initial medical evaluations
  • Before respirators are fit-tested or used in the workplace.
Subsequent medical evaluations
  • If any of these occur:

    – Your licensed healthcare professional (LHCP) recommends them; for example, periodic evaluations at specified intervals.

    – A respirator program administrator or supervisor informs you that an employee needs reevaluation.

    – Medical signs or symptoms (such as breathing difficulties) are:

    • Observed during fit-testing or program evaluation

    OR

    • Reported by the employee

    - Changes in worksite conditions such as physical work effort, personal protective clothing, or temperature that could substantially increase the employee's physiological stress.

 

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60405, filed 12/21/04, effective 04/02/05.]

WAC 296-307-606

Fit testing.

Your responsibility:

To make sure negative and positive-pressure tight-fitting respirators can provide an adequate fit and acceptable level of comfort to employees.

Exemption: This section does NOT apply to any respirators that are:

  • Voluntarily used. See WAC 296-307-598 for voluntary use requirements.
  • Mouthpiece respirators.

Important:

  • Fit testing is an activity where the seal of a respirator is tested to determine if it is adequate.
  • This section covers general requirements for fit testing. Fit-testing procedures are covered in WAC 296-307-62010 of this part.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-606, filed 12/21/04, effective 04/02/05.]

WAC 296-307-60605

Conduct fit testing.

You must

  • Provide, at no cost to the employee, fit tests for ALL tight fitting respirators on the following schedule:

    - Before employees are assigned duties that may require the use of respirators

    - At least every twelve months after initial testing

    - Whenever any of the following occurs:

    • A different respirator facepiece is chosen such as a different type, model, style, or size
    • You become aware of a physical change in an employee that could affect respirator fit. For example, you may observe, or be told about, facial scarring, dental changes, cosmetic surgery, or obvious weight changes
    • An employee notifies you, or your LHCP, that the respirator fit is unacceptable. During the retest, you must give an employee reasonable opportunity to select a different respirator facepiece (size, model, etc.).

Note: You may accept a fit test completed by a previous employer IF:

  • You obtain written documentation of the fit test

    AND

  • The results of the fit test are not more than twelve months old

    AND

  • The employee will use the same respirator (the same type, model, style, and size)

    AND

  • The fit test was conducted in a way that meets the requirements of WAC 296-307-606 and 296-307-62010.

You must

  • Select an appropriate fit-testing procedure from WAC 296-307-62010 of this part

    AND

    - Use quantitative fit-test methods when a negative pressure respirator will be used in concentrations requiring a protection factor greater than 10. This includes:

    • Full facepiece air-purifying respirators
    • SCBAs operated in demand (negative pressure) mode
    • Air-line respirators operated in demand mode.

    - Make sure PAPRs, SCBAs, or air-line respirators are fit tested in negative-pressure mode.

  • Make sure the person conducting fit testing is able to do all of the following:

    - Prepare test solutions if required

    - Make sure equipment works properly

    - Perform tests properly

    - Recognize invalid tests

    - Calculate fit factors properly if required.

Note:

  • No specific training program or certification is required for those who conduct fit tests.
  • You should consider evaluating these individuals to determine their proficiency in the fit-testing method to be used.
  • You can use an evaluation form such as the form included in the American National Standard for Respirator Fit Testing Methods, ANSI/AIHA Z88.10-2001 to determine if the individual meets these requirements. Visit www.ansi.org or www.aiha.org.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60605, filed 12/21/04, effective 04/02/05.]

WAC 296-307-608

Training.

Your responsibility:

To make sure employees who are required to use respirators understand and can demonstrate proper respirator use and maintenance.

Important:

This section applies to employees who voluntarily use respirators only when training is necessary to prevent the respirator from creating a hazard. See WAC 296-307-598 for voluntary use requirements.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-608, filed 12/21/04, effective 04/02/05.]

WAC 296-307-60805

Provide effective training.

You must

  • Train employees, based on their duties, if they do any of the following:

    - Use respirators

    - Supervise respirator users

    - Issue, repair, or adjust respirators

  • Present effective training in a way that employees understand.

Note:

  • Training may be provided using audiovisuals, slide presentations, formal classroom instruction, informal discussions during safety meetings, training programs conducted by outside sources, or a combination of these methods.
  • You may want to have instructors available when using video or automated training methods to:
    • - Encourage and provide responses to questions for the benefit of employees
    • - Evaluate employees' understanding of the material
    • - Provide other instructional interaction to employees.

You must

  • Make sure a qualified instructor provides training
  • Provide training, at no cost to the employee, at these times:

    - Initially, before worksite respirator use begins

    - Periodically, within twelve months of the previous training

    - Additionally, when the following occur:

    • The employee hasn’t retained knowledge or skills

      OR

    • Changes in the worksite, or type of respirator make previous training incomplete or obsolete.

Note:

  • You may accept an employee's previous training, such as training provided by another employer, to satisfy the initial training requirement if:

    - You can demonstrate the employee received training within the past twelve months

    AND

    - The employee can demonstrate the knowledge and skills to use required respirators effectively.

  • If you accept an employee's previous training to satisfy the initial training requirement, you are still responsible for providing periodic, and additional training when needed. Periodic training would need to be provided within 12 months of the employee's previous training.

You must

  • Make sure employees can demonstrate the following knowledge and skills as required by their duties:
    • - Why the respirator is necessary. Include, for example, information identifying respiratory hazards such as hazardous chemicals, the extent of the employee's exposure, and potential health effects and symptoms
    • - The respirator's capabilities and limitations. Include, for example, how the respirator provides protection and why air-purifying respirators can’t be used in oxygen-deficient conditions
    • - How improper fit, use, or maintenance can compromise the respirator's effectiveness and reliability
    • - How to properly inspect, put on, seal check, use, and remove the respirator
    • - How to clean, disinfect, repair, and store the respirator, or how to get this done by someone else
    • - How to use the respirator effectively in emergency situations; including what to do when a respirator fails and where emergency respirators are stored
    • - Medical signs and symptoms that may limit or prevent the effective use of respirators such as shortness of breath or dizziness
    • - The employer's general obligations under this part. For example, developing a written program, selecting appropriate respirators, and providing medical evaluations.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60805, filed 12/21/04, effective 04/02/05.]

WAC 296-307-610

Maintenance.

Your responsibility:

To make sure respirators are maintained so they will function properly and not create health hazards such as skin irritation.

You must

Maintain respirators in a clean and reliable condition

WAC 296-307-61005

Store respirators properly

WAC 296-307-61010

Inspect and repair respirators

WAC 296-307-61015

Important:

This section applies to employees who voluntarily use respirators only when maintenance is necessary to prevent the respirator from creating a hazard. See WAC 296-307-598 for voluntary use requirements.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-610, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61005

Maintain respirators in a clean and reliable condition.

You must

  • Make sure respirators are kept, at no cost to the employee, clean, sanitary and in good working order. Do at least the following:

    - Clean and disinfect respirators as often as specified in Table 8 of this section.

Note:

  • Use required cleaning and disinfecting procedures in WAC 296-307-62015, or the manufacturer's procedures that:

    - Result in a clean and sanitary respirator

    - Do not damage the respirator

    - Do not harm the user

  • Automated cleaning and disinfecting are permitted

  • Cleaning and disinfecting may be done by a central facility as long as you make sure respirators provided are clean, sanitary, and function properly.

You must

  • Make sure respirators are assembled properly after cleaning or disinfecting.

Use Table 8 to determine how often to clean and disinfect respirators.

Table 8
Required Frequencies for Cleaning and Disinfecting Respirators

If, the respirator will be...
Then, clean and disinfect the respirator...
  • Used exclusively by one employee
  • As often as needed to:

    - Keep it clean and functional

    AND

    - To prevent health hazards such as skin irritation

  • Shared for nonemergency use

    OR

  • Used for fit-testing or training
  • Before it is worn by another employee
  • Shared for emergency use
  • After each use so the respirator is immediately ready for use at all times

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-60105, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61010

Store respirators properly.

You must

  • Store respirators to protect them from ALL of the following:

    - Deformation of the facepiece or exhalation valve

    - Sunlight or extreme temperatures or other conditions

    - Contamination such as dust or damaging chemicals

    - Excessive moisture.

Note: Use coffee cans, sealable plastic bags, or other suitable means of protection.

You must

  • Follow these additional requirements for emergency respirators:

    - Keep respirators accessible to the work area

    - Store respirators in compartments or with covers clearly marked as containing emergency respirators

    - Follow additional storage instructions from the respirator manufacturer

    - Store an adequate number of emergency respirators in each area where they may be needed.

Note: Emergency respirators include mouthpiece respirators and other respirators that are limited to escape-only use by their NIOSH certification.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61010, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61015

Inspect and repair respirators.

You must

  • Conduct respirator inspections as often as specified in Table 9.
  • Make sure respirator inspections cover all of the following:

    - Respirator function

    - Tightness of connections

    - The condition of the facepiece, head straps, valves, connecting tubes, and cartridge, canisters or filters

    - Pliability and deterioration of elastomeric parts

    - Maintenance of air or oxygen cylinders

    - Making sure SCBA air cylinders are at 90y percent of the manufacturer's recommended pressure level

    - Proper functioning of SCBA regulators when air-flow is activated

    - Proper functioning of SCBA low-pressure warning devices when activated

  • Certify inspections for emergency respirators by documenting the following:

- Inspection date

- Serial number of each respirator or other identifying information

- Inspector's name or signature

- Inspection findings

- Required action, if problems are found.

Note:

  • When documenting inspections you may either:

    - Provide the information on a tag or label and attach it to the respirator compartment

    OR

    - Include the information in an inspection report stored in paper or electronic files accessible to employees.

You must

  • Repair or replace any respirator that isn’t functioning properly before the employee returns to a situation where respirators are required.

    - If respirators fail inspection or are not functioning properly during use due to problems such as leakage, vapor or gas breakthrough, or increased breathing resistance, ALLof the following apply:

    • Do NOT permit such respirators to be used until properly repaired or adjusted
    • Use only NIOSH-certified parts
    • Make sure repairs and adjustments are made by appropriately trained individuals

    - Use the manufacturer or a technician trained by the manufacturer to repair or adjust reducing and admission valves, regulators, and warning devices on SCBAs or air-line respirators.

Follow the manufacturer's recommendations and specifications for the type and extent of repairs.

Use Table 9 to determine how often to inspect respirators.

Table 9
Required Frequencies for Respirator Inspections

If the respirator is...
Then inspect...
A SCBA in any use
  • Before each use

    AND

  • During cleaning

    OR

  • Monthly is NOT used
Used for nonemergencies, including day-to-day or infrequent use
  • Inspect before each use

    AND

  • During cleaning
Used only for emergencies
  • Check for proper function before and after each use

    AND

  • Inspect at least monthly as instructed by the manufacturer
Used for escape-only purposes
  • Before carrying into a work place for use

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61015, filed 12/21/04, effective 04/02/05.]

WAC 296-307-612

Safe use and removal of respirators.

Your responsibility:

To make sure respirator use and removal is safe.

Exemption: These sections do NOT apply to employees who voluntarily use any type of respirator. See WAC 296-307-598 for voluntary use requirements.

You must

Prevent sealing problems with tight-fitting respirators

WAC 296-307-61205

Make sure employees leave the use area before removing respirators

WAC 296-307-61210.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-612, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61205

Prevent sealing problems with tight-fitting respirators.

You must

  • Make sure employees use the procedure in WAC 296-307-62020 to perform a user seal check each time they put on their tight-fitting respirator.
  • Make sure you do NOT permit respirator use if employees have a characteristic that interferes with the respirator facepiece seal or valve function. For example, stubble, moustaches, sideburns, bangs, hairlines, or scars between the face and the sealing surface of the respirator will affect the seal.
  • Make sure corrective glasses or personal protective equipment (PPE) do NOT interfere with the facepiece seal. Examples of PPE include safety glasses, goggles, faceshields, clothing, and hard hats.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61205, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61210

Make sure employees leave the use area before removing respirators.

You must

  • Make sure employees leave the use area for any of these reasons:

    - To replace air-purifying filters, cartridges, or canisters

    - When they smell or taste (detect) vapor or gas leakage from, for example, cartridges, canister, or the facepiece seal

    - When they detect changes in breathing resistance

    - To readjust their respirators

    - To wash their faces and respirators as necessary to prevent skin or eye irritation

    - If they become ill

    - If they experience sensations of dizziness, nausea, weakness, breathing difficulty, coughing, sneezing, vomiting, fever, or chills.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61210, filed 12/21/04, effective 04/02/05.]

WAC 296-307-614

Standby requirements for immediately dangerous to life or health (IDLH) conditions.

Your responsibility:

To provide adequate assistance to employees using respirators in conditions immediately dangerous to life or health (IDLH).

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-614, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61405

Provide standby assistance in immediately dangerous to life or health (IDLH) conditions.

Important:

WISHA currently uses the IDLH values in the 1990 NIOSH Pocket Guide to Chemical Hazards to determine the existence of IDLH conditions. You may use more recent editions of this guide. Visit www.cdc.gov/niosh for more information.

You must

  • Provide at least two standby employees outside the IDLH area.

Note: You need only one standby employee if the IDLH condition is well characterized, will remain stable AND you can show one employee can adequately do ALL of the following:

  • Monitor employees in the IDLH area
  • Implement communication
  • Initiate rescue duties.
  • Train and equip standby employees to provide effective emergency rescue. Equip them with:
    • - A pressure-demand SCBA or a pressure-demand air-line respirator with an auxiliary SCBA, for each standby employee
    • - Appropriate retrieval equipment, when it would help with the effective rescue of the entrant, or an equivalent means of rescue
  • Make sure standby employees maintain visual, voice, or signal line communication with employees in the IDLH area
  • Make sure that in the event of an emergency:
    • - Standby employees notify you or your designee before they enter the IDLH area to provide emergency rescue
    • - You provide necessary assistance when notified.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61405, filed 12/21/04, effective 04/02/05.]

WAC 296-307-616

Air quality for self-contained breathing apparatus (SCBA) and air-line respirators.

Your responsibility:

To provide employees who use SCBAs or air-line respirators with an acceptable air supply.

You must

Make sure breathing air and oxygen meet established specifications

WAC 296-307-61605

Prevent conditions that could create a hazardous breathing air supply

WAC 296-307-61610

Make sure compressors don’t create a hazardous breathing air supply

WAC 296-307-61615.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-616, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61605

Make sure breathing air and oxygen meet established specifications.

You must

  • Make sure that all SCBAs and air-line respirators are provided with safe breathing air and oxygen according to the following:
    • - Compressed breathing air must meet the following specifications for Grade D air:
  • Oxygen (volume/volume) within 19.5-23.5%
  • Hydrocarbon (condensed): NO MORE than five milligrams per cubic meter of air
  • Carbon monoxide (CO): NO MORE than ten parts per million (ppm)
  • Carbon dioxide (CO2): NO MORE than 1,000 ppm
  • No noticeable odor

Reference: See the American National Standards Institute Compressed Gas Association Commodity Specification for Air (G-7.1.1989) for more information. Contact your local library to access a copy.

You must

  • Make sure the moisture content of the air supplied meets the following:
    • - Air supplied to respirators from cylinders must NOT exceed a dew point of -50°F (or -45.6°C) at 1 atmospheric pressure.
    • - Compressor supplied air must not exceed a dew point of 10°F (or 5.56°C) BELOW the use temperature at 1 atmospheric pressure.
  • Cylinders obtained from a supplier of breathing air must have a certificate of analysis that verifies each cylinder's contents meet Grade D and dew point standards.
  • Compressed and liquid oxygen must meet the United States Pharmacopoeia requirements for medical or breathing oxygen.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61605, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61610

Prevent conditions that could create a hazardous breathing air supply.

You must

  • Use SCBA and air-line respirators safely:
    • - Do NOT supply compressed oxygen to SCBAs or air-line respirators that previously used compressed air.

Note: Compressed air leaves residues containing hydrocarbons such as oil or grease. Fire or explosion can occur if compressed oxygen makes contact with these residues.

You must

  • Use breathing air couplings on air-line respirators that are NOT compatible with couplings for nonrespirable air or other gas systems, for example, utility air used for manufacturing purposes.
  • Do NOT allow asphyxiating substances to enter breathing air lines; for example, don’t flush nitrogen through worksite air lines also used for breathing air.
  • Use equipment specifically designed for oxygen service or distribution IF oxygen concentrations greater than 23.5% are used.

Note: Respiratory equipment NOT designed for oxygen service or distribution can create fire or explosion hazards in oxygen concentrations higher than 23.5%.

You must

  • Make sure cylinders used to supply breathing air for SCBAs or air-line respirators are tested and maintained as described in the federal Department of Transportation's (DOT) Shipping Container Specification Regulations, Title 49 CFR Parts 173 and 178.

Note:

  • Use only cylinders marked (with serial number, cylinder pressure, DOT exemption number, and test dates) according to these DOT regulations
  • To find any Code of Federal Regulations (CFR) visit: www.access.gpo.gov.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61610, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61615

Make sure compressors do not create a hazardous breathing air supply.

Important:

  • Ambient-air movers (or pumps) used to supply air to respirators must be used according to the manufacturer's instructions.
  • Respirators used with ambient-air movers must be approved by NIOSH to operate within the pressure ranges of the air mover.

You must

(1) Locate or modify compressor intakes so they won’t pick up contaminated air OR exhaust gases such as carbon monoxide from:

  • Fuel-powered vehicles

    OR

  • The internal combustion motor of the compressor

    OR

  • Other contaminant sources in the area, for example, a ventilation system discharge.

Note:

  • You may need to reposition or extend the compressor's intake or engine exhaust pipe or outlet, especially if they are located near each other.
  • Be aware that exhaust gases may not adequately disperse when the compressor is operated in:
    • - An enclosed space such as a small room, a corner, or near a wall
    • OR
    • - In turbulent wind conditions.

You must

(2) Equip compressors with suitable air-purifying filters, water traps, and sorbents (such as charcoal beds) and maintain them as follows:

  • Periodically change or clean them according to the manufacturer or supplier's instructions
  • Keep a tag at the compressor with the following information:
    • - When the sorbent and filters were last replaced or cleaned
    • - The date of the most recent changes or cleaning
    • - The signature of the person authorized by the employer to perform changes or cleaning.

Note: To be sure you are providing the recommended operating pressure for respirators, you may need to install a delivery pressure gauge at the point where the manifold respirator hose is attached.

You must

(3) Make sure the carbon monoxide (CO) level in breathing air from compressors does NOT exceed ten parts per million (ppm).

Note: If you don’t have a reliable CO-free area available for locating your compressor intake, consider these examples of methods to prevent CO contamination of the air supply:

  • Use of continuous and effective carbon monoxide alarms and filters
  • Conduct frequent monitoring of air quality
  • Use a CO converter (converts CO to carbon dioxide).

You must

  • Maintain CO levels in oil lubricated compressors by using at least one of the following:
    • - An effective CO alarm
    • - An effective high temperature alarm AND testing the air supply often enough to see if CO levels exceed ten ppm.

Note:

  • How often to test depends on a number of considerations, for example:
    • - Compressor age
    • - Maintenance history of the compressor
    • - Stability of CO readings
  • If the CO or high temperature alarm can’t be heard by the employee, a flashing light or other effective alternative to an audio alarm needs to be used
  • Safeguards, such as alarms, are necessary to prevent CO contamination resulting from compressor overheating
  • Any type of oil-lubricated compressor, such as screw or piston types, may produce dangerous levels of CO if overheating occurs
    • - Old compressors are known to leak oil due to worn parts, increasing the possibility for overheating. Newer compressors may also overheat if maintenance practices are poor. For example, poor maintenance practices may lead to disconnected or incorrectly set alarms, inoperative shut-offs, or an impaired cooling system
  • You need to instruct employees to move to a safe area when the alarm sounds AND to stop using respirators.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61615, filed 12/21/04, effective 04/02/05.]

WAC 296-307-618

Labeling of air-purifying respirator filters, cartridges, and canisters.

Your responsibility:

To make sure employees, their supervisors, and program administrators can easily check for the correct air-purifying filters, cartridges, and canisters on respirators.

Exemption: This section does NOT apply to filtering-facepiece respirators when used voluntarily. See WAC 296-307-598 for voluntary use requirements.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-618, filed 12/21/04, effective 04/02/05.]

WAC 296-307-61805

Keep labels readable on respirator filters, cartridges, and canisters during use.

You must

  • Make sure the NIOSH certification labeling and color-coding on air-purifying respirator filters, cartridges, and canisters remains readable and intact during use.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-61805, filed 12/21/04, effective 04/02/05.]

WAC 296-307-620

Required procedures for respiratory protection program.

Your responsibility:

To use the procedures and questionnaire provided in this section when implementing your respiratory protection program.

You must

Use this medical questionnaire for medical evaluations
WAC 296-307-62005

Follow these fit-testing procedures for tight-fitting respirators
WAC 296-307-62010

Follow procedures established for cleaning and disinfecting respirators
WAC 296-307-62015

Follow procedures established for seal checking respirators
WAC 296-307-62020.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-620, filed 12/21/04, effective 04/02/05.]

WAC 296-307-62005

Use this medical questionnaire for medical evaluations.

You must

  • Use the medical questionnaire in Table 10 when conducting medical evaluations.

Note:

  • You may use a physical exam instead of this questionnaire if the exam covers the same information as the questionnaire.
  • You may use on-line questionnaires if the questions are the same and the requirements in WAC 296-307-604 of this part are met.
  • You may choose to send the questionnaire to the LCHP ahead of time, giving time to review it and add any necessary questions.
  • The LHCP determines what quesions to add to the questionnaire, if any; however, questions in Parts 1-3 may not be deleted or substantiallh altered.

Table 10

WISHA Medical Evaluation Questionnaire
Employer instructions:
  • You may use on-line questionnaire if the requirements in WAC 296-307-60405 are met.
  • You must tell your employer how to deliver or send the completed questionnaire to the healthcare provider you have selected.
  • You must NOT review employees' questionnaire.
Healthcare provider's instructions:
  • Review the information in this questionnaire and any additional information provided to you by the employer.
  • You may add questions to this questionnaire at your discretion, HOWEVER, questions in Parts 1-3 may not be deleted or substantially altered.
  • Follow-up evaluation is required for any positive response to questions 1-8 in Part 2, or questions 1-6 in Part 3. This might include: Phone consultations to evaluate positive responses, medical tests, and diagnostic procedures.
  • When your evaluation is complete, send a copy of your written recommendation to the employer AND employee.
Employee information and instructions:
  • Your employer must allow you to answer this questionnaire during normal working hours, or at a time and place that's convenient to you.
  • Your employer or supervisor must not look at or review your answers at any time.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-62005, filed 12/21/04, effective 04/02/05.]

Part 1 - Employee Background Information

 

WAC 296-307-62010

Follow these fit-testing procedures for tight-fitting respirators.

Important:

  • This section contains procedural requirements that apply during actual fit testing.
  • See WAC 296-307-606 of this part for fit-testing requirements that apply to your overall program.

Exemptions: This section does NOT apply to employees who:

  • Voluntarily use respirators
    OR
  • Are required to use mouthpiece respirators.

You must

  • Conduct fit testing according to all of the following:
    • - Follow the procedure in Table 11 to choose a respirator for fit testing:
    • Prior to conducting fit tests
      AND
    • Any time your employee must select a different respirator such as when a previously selected respirator fails a test
    • - Select and follow at least one of the following fit test procedures:
    • Qualitative fit-test procedures:
    • Quantitative fit-test procedures:
      • - Ambient aerosol condensation nuclei counter such as the Portacount™, in Table 16
      • - Controlled negative pressure (CNP) such as the FitTester 3000™, in Table 17
      • - Generated aerosol in Table 18
    • - Make sure employees perform the appropriate fit-test exercises listed in Table 19.
    • - Clean and maintain equipment according to the manufacturer's instructions.
    • - Make sure during fit testing employees wear any safety equipment that could:
        • Interfere with respirator fit
          AND
        • Be worn in the workplace. For example, chemical splash goggles.
    • - Check, prior to fit testing, for conditions that may interfere with the respirator seal or valve functions. If you find such conditions, do NOT conduct fit testing for that individual.

Note: Examples of conditions that may interfere with the respirator seal or valve functions include:

  • Moustache, stubble, sideburns, bangs, hairline, and other types of facial hair in areas where the respirator facepiece seals or that interfere with valve function
  • Temple bars of corrective eyewear or headgear that extend through the face seal area.

Table 11

Procedure for Choosing a Respirator for Fit Testing
  1. Inform the employee
    • To choose the most comfortable respirator that provides an adequate fit
    • That each respirator sample represents a different size and, if more than one model is supplied, a different shape
    • That if fitted and used properly, the respirator chosen will provide adequate protection.
  2. Provide a mirror and show the employee how to:
    • Put on the respirator
    • Position the respirator on the face
    • Set strap tension.

    Note: This instruction does NOT take the place of the employee's formal training since it is only a review.

  3. Review with the employee how to check for a comfortable fit around the nose, cheeks and other areas on the face
    • Tell the employee the respirator should be comfortable while talking or wearing eye protection
  4. Have the employee hold each facepiece against the face, taking enough time to compare the fit of each. The employee can then either:
    • Reject any facepiece that clearly doesn't feel comfortable or fit adequately.

      OR

    • Choose which facepiece is most acceptable and which is less acceptable, if any.

    Note:

    • Supply as many respirator models and sizes as needed to make sure the employee finds a respirator that's acceptable and fits correctly.
    • To save time later, during this step note the more acceptable facepieces in case one chosen fails the fit test or proves unacceptable later.
  5. Have the employee wear the most acceptable respirator for AT LEAST 5 minutes to evaluate comfort and fit. Do ALL of the following during this time:
    • Ask the employee to observe and comment about the comfort and fit:
      • - Around the nose, cheeks, and other areas on the face
      • - When talking or wearing eye protection
    • Have the employee put on the respirator and adjust the straps until they show proficiency.
    • Evaluate the respirator's general fit by checking:
      • - Proper chin placement
      • - Properly tightened straps (do NOT over tighten)
      • - Acceptable fit across the nose bridge
      • - Respirator size; it must span the distance from nose to chin
      • - To see if the respirator stays in position
    • Have the employee complete a successful seal check as specified in WAC 296-307-62020 of this chapter.
      • - Prior to the seal check they must settle the respirataor on their face
        by taking a few slow deep breaths WHILE SLOWLY:

        • Moving their head from side-to-side
        • AND
        • Up and down.
  1. If the employee finds the respirator unacceptable, allow the employee to select another one and return to Step 5. Otherwise, proceed to Step 7.
  2. Before starting the fit test, you must:
    • Describe the fit test including screening procedures, employee responsibilities, and test exercises

      AND

    • Make sure the employee wears the respirator AT LEAST 5 minutes

 

Table 12

Isoamyl Acetate (Banana Oil) Vapor Test Procedure

Important:

  • This is a qualitative fit-test (QLFT) procedure
  • The success of this test depends on preserving the employee's odor sensitivity to isoamyl acetate (IAA) vapor
    • - Vapor accumulations in ambient air can decrease odor sensitivity. To prevent this:
      • Prepare ALL solutions in a location separate from screening and test areas
      • Conduct screening and tests in separate well-ventilated rooms. For example, use an exhaust fan or laboratory hood to prevent IAA vapor from accumulating in the room air
    • - Always use odor-free water, for example, distilled or spring water that's 25°C (77°F).
  • Isoamyl acetate is also known as isopentyl acetate.
Screening Preparations

Important:

Odor threshold screening determines if the employee can detect weak concentrations of IAA vapor.

  1. Choose an appropriate location to conduct screening.
    • Conduct screening and tests in well-ventilated rooms.
  2. Prepare a stock solution AT LEAST weekly as follows:
    • Add one milliliter (ml) of pure IAA to 800 ml of odor-free water in a one-liter glass jar with a metal lid using a measuring dropper or pipette
    • Seal the jar with the lid and shake it for 30 seconds
    • Clean the dropper or pipette
  3. Prepare the odor test solution daily as follows:
    • Add 0.4 ml from the stock solution to 500 ml of water in a one liter glass jar with a metal lid using a clean pipette or dropper
    • Seal the jar with the lid and shake it for 30 seconds
    • Let this solution stand for 2-3 minutes so the IAA concentration above the liquid reaches equilibrium
    • Label this jar so you know the contents but the employee can't know it contents, for example, "1."

Note:

To maintain the integrity of the test, use labels that peel off easily AND periodically switch the labels.

  1. Prepare a "test blank" solution as follows:
    • Add 500 ml of odor-free water to a one liter glass jar with a metal lid
    • Seal the jar
    • Label the jar so you know the contents but the employee can't know its contents.
  2. Type or neatly print the following instructions on a card and place it on the table in front of the two test jars:

    "The purpose of this test is to find out if you can smell banana oil at a low concentration. While both jars contain water, one ALSO contains a small amount of banana oil.

    Make sure the lid is secure then pick up a jar and shake it for two seconds. Open the jar and sniff at the opening. Repeat this for the second jar.

    Tell the individual conducting the fit test which jar contains banana oil."

Test Preparations
  1. Choose an appropriate location to conduct fit testing.
    • Conduct screening and tests in separate well-ventilated rooms.
  2. Assemble the fit test enclosure in the room.
    • Invert a clean 55-gallon drum liner over a circular 2-foot diameter frame made of plywood or other lightweight rigid material OR construct a similar enclosure using plastic sheeting
    • Hang the frame with the plastic covering so the top of the enclosure is about 6 inches above the employee's head
    • Attach a small hook inside top center of the enclosure
    • Tape a copy of the test exercises (see Table 28) to the inside of the test enclosure where the employee can read it.
  3. Have organic vapor cartridges or equivalent on hand for each employee's chosen respirator.
  4. Have ready a 6 x 5-inch piece of paper towel or other porous absorbent single-ply material AND 0.75 ml of pure IAA. Do NOT apply IAA yet.

Note: As an alternative to using the paper towel, you may use an IAA test swab OR ampoule if it has been demonstrated to generate an equivalent test concentration.

Screening
  1. Have the employee, while NOT wearing a respirator, follow the instructions on the card provided.
    • If the employee correctly identifies the jar containing IAA, proceed to conduct testing (Step 11)
    • If the employee is NOT able to correctly identify the jar containing IAA, you must STOP and use a different fit test protocol.
Test
  1. BEFORE entering the fit test room, have the employee attach cartridges, put on, properly adjust, and seal check the respirator. Have the employee enter the test enclosure.
  2. Wet the paper towel with 0.75 ml of pure IAA AND fold it in half.
  3. Pass the paper towel to the employee inside the enclosure AND instruct the employee to hang it on the hook at the top of the enclosure.
  4. Wait 2 minutes for the IAA vapor to fill the enclosure.
    • While waiting, explain the fit test, including the purpose of the test exercises, the importance of cooperation, and that you must be informed if a banana-like odor is detected during the test
    • You may also demonstrate the test exercises.
  5. Have the employee perform the appropriate fit-test exercises in Table 19.
    • If the employee does NOT detect IAA while performing test exercises, the fit test has been PASSED. Proceed as follows:

      - BEFORE leaving the enclosure, have the employee break the respirator seal and inhale. If they detect IAA, the test is valid.

      - When exiting the employee must remove the paper towel and give it to the individual conducting the fit test. This prevents IAA vapor from building up in the enclosure during subsequent tests

      - The individual conducting the fit test must keep used paper towels in a self-sealing plastic bag to prevent area contamination

    • If the employee detects IAA during any test exercise, the fit test has FAILED. STOP and have the employee do the following:

      - Quickly return to the selection room to remove the respirator. This avoids decreasing the employee's odor sensitivity

      - Select another respirator

      - Repeat screening and testing

      • At this stage, if the employee fails the screening part of this procedure, the employee can repeat if AFTER waiting at least 5 minutes for odor sensitivity to return.

       

Table 13

Saccharin Aerosol Test Procedures
Screening Preparations

Important:

  • This is a qualitative fit-test (QLFT) procedure
  • Taste threshold screening determines whether the employee being tested can detect the taste of saccharin
    • - The employee must NOT eat, smoke, chew gum or drink anything but plain water for at least 15 minutes BEFORE the fit test. Sweet foods or drink consumed before the test may make the employee unable to detect saccharin during screening.
    • - Nebulizers must be thoroughly rinsed in water and shaken dry:
    • Each morning and afternoon

      AND

    • At least every 4 hours.
  • You may use commercially prepared solutions if they meet the requirements in this procedure.
  1. Obtain a test enclosure (hood) that meet the following specifications:
    • Twelve inches in diameter by 14 inches tall
    • A clear front portion
    • Enough space inside to allow free movement of the head when a respirator is worn
    • A 3/4 inch (or 1.9 centimeter) hole to accommodate the nebulizer nozzle. The hole must line up in front of the wearer's nose and mouth.

Note:

  • An enclosure similar to the 3M hood assembly, parts #Ft 14 and #FT 15 combined, meets these specifications
  • This enclosure can also be used for testing.
  1. Obtain and assemble two clean De Vilbiss Model 40 Inhalation Medication Nebulizers OR equivalent
  2. Prepare the screening solution as follows:
    • Dissolve 83.0 milligrams of sodium saccharin USP in 100 ml of warm distilled water

      OR

    • IF you have already prepared the fit-test solution, you can make the screening solution by adding 1 ml of this solution to 100 ml of distilled water.
  3. Add about 1 ml of the screening solution to one of the nebulizers.
    • Mark this nebulizer to distinguish it from the one to be used for fit testing.
Test Preparations
  1. Prepare the fit-test solution as follows:
    • Add 83.0 grams of sodium saccharin to 100 ml of warm water.
  2. Add about 1 ml of the test solution to the second nebulizer.
    • Mark this nebulizer to distinguish it from the one used for screening
  3. Have particulate filters ready for the employee's chosen respirator or have filtering-facepiece respirators ready.
Screening
  1. Have the employee, while NOT wearing a respirator, put on the test enclosure.
  2. Instruct the employee to:
    • Breath through a slightly open mouth with tongue extended during screening AND testing
    • Immediately report when a sweet taste is detected.
  3. Insert the nebulizer into the front hole of the test enclosure AND administer saccharin as follows:
    • Direct the nozzle away from the employee's nose and mouth
    • Complete 10 squeezes in rapid succession
    • Each time firmly squeeze the bulb so it collapses completely, then release and allow it to fully expand.
  4. Ask the employee if a sweet taste is detected.
    • If YES, screening is completed. Proceed to conduct testing, Step 14, AFTER you:

      - Ask the employee to remember the taste for reference during the fit test

      - Note the employee's taste threshold as "10" regardless of the number of squeezes actually completed

    • If NO, screening must continue. Proceed to Step 12.
  5. Repeat with 10 more squeezes. Then follow Step 11 again; EXCEPT this time note the employee's taste threshold as "20" IF a sweet taste is reported.
    • If a sweet taste is still NOT detected, repeat with 10 more squeezes and follow Step 11 one last time; EXCEPT this time note "30" for the taste threshold IF a sweet taste is reported.
  6. If NO sweet taste is reported after 30 squeezes, you must STOP and choose a different fit-test protocol for the employee.
Test
Important:
  • Periodically check nebulizers to make sure they don't clog during use. A test is NOT valid if the nebulizer is clogged at the end of the test.
  1. Have the employee attach particulate filters, put on, properly adjust, and seal check the respirator. Have the employee put on the test enclosure (hood).
  2. Instruct the employee to immediately report if a sweet taste is detected.
  3. Insert the nebulizer into the front hole of the test enclosure AND administer the same number of squeezes, either 10, 20, or 30, as noted during screening.
  4. Have the employee perform the appropriate fit-test exercises as described in Table 19. During this step:
    • Replenish the aerosol in the hood EVERY 30 seconds using 1/2 the number of squeezes used in Step 16, either 5, 10, or 15
    • The employee must report if a sweet taste is detected:

      - If NO saccharin is tested, the test has been PASSED

      • If saccharin is tasted the test has FAILED, have the employee select another respirator

        AND

      • Repeat screening and testing.

         

Table 14

Bitrex™ Aerosol Test Procedure
Important:
  • This is a qualitative fit-test (QLFT) procedure
  • Bitrex™(denatonium benzoate) is routinely used as a taste aversion agent in household liquids that children shouldn't drink and is endorsed by the American Medical Association, the National Safety Council, and the American Association of Poison Control Centers.
  • The employee must NOT eat, smoke, chew gum or drink anything but plain water for at least 15 minutes BEFORE the fit test.
Screening Preparations
Important:
  • Taste threshold screening determines whether the employee being tested can detect the taste of Bitrex™
  • Nebulizers must be thoroughly rinsed in water and shaken dry:

    - Each morning and afternoon

    OR

    - At least every 4 hours

  • You may use commercially prepared solutions if they meet the requirements in this procedure.
  1. Obtain a test enclosure that meets the following specifications:
    • Twelve inches in diameter by 14 inches tall
    • A clear front portion
    • Enough space inside the front to allow free movement of the head when a respirator is worn
    • 3/4 inch (or 1.9 centimeter) hole to accommodate the nebulizer nozzle. The hole must line up in front of the wearer's nose and mouth.

Note:

  • An enclosure similar to the 3M hood assembly, parts #FT 14 and #FT 15 combined, meet these specifications
  • This enclosure can also be used for testing.
  1. Obtain and assemble two clean De Vilbiss Model 40 Inhalation Medication Nebulizers OR equivalent:
  2. Prepare the screening solution as follows:
    • Make up a 5% salt solution by dissolving 5.0 grams of salt (sodium chloride) into 100 ml of distilled water
    • Dissolve 13.5 milligrams Bitrex™ in the salt solution.
  3. Add about 1 ml of the screening solution to one of the nebulizers.
    • Mark this nebulizer to distinguish it from the one to be used for fit testing
Test Preparation
  1. Prepare the fit test solution.
    • Dissolve 10.0 grams of salt (sodium chloride) into 200 ml of distilled water
    • Add 337.5 milligrams of Bitrex™ to the warmed salt solution.
  2. Add about 1 ml of the test solution to the second nebulizer.
    • Mark this nebulizer to distinguish it from the one used for screening.
  3. Have particulate filters ready for the employee's chosen respirator or have filtering-facepiece respirators ready.
Screening
Important:

The employee must NOT eat, smoke, chew gum or drink anything but plain water for at least 15 minutes BEFORE the screening and test.

  1. Have the employee, while NOT wearing a respirator, put on the test enclosure.
  2. Instruct the employee to:
    • Breath through a slightly opened mouth with tongue extended during screening AND testing
    • Immediately report when a bitter taste is detected.
  3. Insert the nebulizer into the front hole of the test enclosure AND administer Bitrex™as follows:
    • Direct the nozzle away from the employee's nose and mouth
    • Complete 10 squeezes in rapid succession
    • Each time firmly squeeze the bulb so it collapses completely, then release and allow it to fully expand.
  4. Ask the employee whether a bitter taste is detected.
    • If YES, screening is completed. Proceed to conduct testing, Step 14, AFTER you:

      - Ask the employee to remember the taste for reference during the fit test

      - Note the employee's taste threshold as "10," regardless of the number of squeezes actually completed

    • If NO, screening must continue. Proceed to Step 12.
  5. Repeat with 10 more squeezes. Then follow Step 11 again; EXCEPT this time note the employee's taste threshold as "20" IF a bitter taste is reported.
    • If a bitter taste is still NOT detected repeat with 10 more squeezes and follow Step 11 one last time; EXCEPT this time note "30" for the taste threshold IF a bitter taste is reported.
  6. If NO bitter taste is reported after 30 squeezes, you must STOP and choose a different fit-test protocol for the employee.
Test
  1. Have the employee attach particulate filters, put on, properly adjust, and seal check the respirator. Have the employee put on the test enclosure.
  2. Instruct the employee to:
    • Breath through a slightly opened mouth with tongue extended during screening AND testing
    • Immediately report when a bitter taste is detected.
  3. Insert the nebulizer into the front hole of the test enclosure AND administer the same number of squeezes, either 10, 20, or 30, as noted during screening.
  4. Have the employee perform the appropriate fit-test exercises as described in Table 19. During this step:
    • Replenish the aerosol in the hood EVERY 30 seconds using 1/2 the number of squeezes used in Step 16, either 5, 10, or 15
    • The employee must report if a bitter taste is detected:

      - If NO Bitrex™is tasted, the test has been PASSED

      - If Bitrex™ is tasted the test has FAILED.Have the employee:

      • Select another respirator

        AND

      • Repeat all screening and test steps.

 

Table 15

Irritant Smoke (Stannic Chloride) Test Procedure
Important:
  • DO NOT USE A TEST ENCLOSURE OR HOOD FOR THIS FIT TEST!
  • This is a qualitative fit-test (QLFT) procedure
  • During this test an employee is exposed to irritating smoke containing hydrochloric acid produced by stannic chloride ventilation smoke tube to detect leakage. The smoke will irritate eyes, lungs, and nasal passages
  • Employee sensitivity varies, and certain employees may respond more intensely than others exposed to irritant smoke. The individual conducting the fit test must take precautions to minimize the employees' exposure to irritant smoke
  • Conduct fit testing in an area with adequate ventilation to prevent exposure of the individual conducting the fit test and build-up of irritant smoke in the ambient air.
Screening AND Test Preparations
Important:

Sensitivity screening is necessary to determine whether the employee can detect a weak concentration of irritant smoke AND whether any gross facepiece leakage is detected.

  1. Obtain only stannic chloride (ventilation) smoke tubes, AND an aspirator squeeze bulb OR use a low-flow air pump set to deliver 200 milliliters of air flow per minute.
  2. Equip the employee's chosen respirator with P100 series filters if a negative pressure air-purifying respirator will be tested. If a powered air-purifying respirator (PAPR) will be tested equip the respirator with high-efficiency particulate air (HEPA) filters.
Screening
Important!

When performing sensitivity screening checks use only the MINIMUM amount of smoke necessary to elicit a response from the employee.

  1. Advise the employee that the smoke can be irritating to eyes, lungs, and nasal passages AND instruct the employee to keep eyes closed while exposed.
  2. Break both ends of the ventilation smoke tube AND fit a short piece of plastic tubing, for example, 2-to-6 inches of tygon tubing, over one end to prevent exposure to the sharp end of the tube. Connect the other end to an aspirator bulb or a low-flow air pump set to deliver a flow of 200 ml per minute.
  3. While the employee is NOT wearing a respirator, have the employee smell a weak concentration of irritant smoke to become familiar with its irritating properties.
    • Carefully direct a small amount of irritant smoke toward the employee.
Test
  1. Have the employee attach respirator filters, put on, adjust, and seal check the respirator without assistance. The employee must be proficient at these tasks.
  2. Remind the employee to keep eyes closed during testing.
  3. Direct a stream of irritant smoke toward the respirator's face seal area as follows:
    • Begin at least 12 inches from the facepiece AND move the smoke around the whole perimeter of the mask
    • Gradually make two more passes around the perimeter of the facepiece, moving to within 6 inches of the respirator
    • STOP at any time the employee detects smoke in the facepiece. If this occurs a different respirator will need to be chosen and tested, beginning with sensitivity screening.
  4. Have the employee perform appropriate fit-test exercises in Table 19 IF the employee has NOT had an involuntary response such as evidence of coughing, flinching, or other response, OR detected smoke in the facepiece.
    • Continue to direct smoke from a distance of 6 inches around the facepiece perimeter

      - If smoke is detected at any time the test has FAILED.A different respirator must be chosen and tested, starting with sensitivity screening

      - If NO smoke is detected proceed to Step 10

  5. Have the employee remove the respirator AND perform another sensitivity screening check as follows:
    • Continue to use the smoke tube used for fit testing
    • Carefully direct a SMALL amount of irritant smoke toward the employee

      - The test has been PASSED IF the employee responds to the smoke

      - The fit test is VOIDED IF the employee does NOT respond to the smoke.

 

Table 16

Ambient Aerosol Condensation Nuclei Counter

(Portacount™ ) Test Procedure

Important:
  • This is a quantitative (QNFT) fit-test procedure
  • This method uses a particle counting instrument that measures and compares the particle concentration both inside and outside the respirator facepiece while the employee performs a series of test exercises
  • Particles in the ambient air are used as the test aerosol.
Test Preparations
  1. Obtain a test instrument such as Portacount™ .
  2. Have probed respirators available for each respirator model and size the employer uses, OR have a sampling adapter available if the employee's actual or chosen respirator will be tested.

Note:

  • A probed respirator has a special fitting installed on the facepiece designed to connect with the end of the test instrument's plastic sampling tube so that air samples can be taken inside the facepiece. Probed respirators can be obtained from the respirator manufacturer, or distributor, AND can only be used for fit-testing purposes
  • Contact TSI Inc., OR the respirator's manufacturer to obtain probed respirators or facepiece sampling adapters.
  1. Follow the test instrument manufacturer's instructions for the test preparation, including particle, zero, and system checks. Make sure the instrument's pass OR fail criterion is programmed to the following MINIMUM performance levels:
    • For half-facepiece respirators, aon overall minimum fit factor of 100 as a passing level
    • For full-facepiece respirators, an overall minimum fit factor of 500 as a passing level.
  2. Have high-efficiency particulate air (HEPA) filters, OR other respirator filters available that are capable of preventing significant penetration by particles generated by the test instrument such as, P100 or N95 series filters.
    • If you'll use a sampling adapter instead of probed respirators be sure to have the correct type for the respirators chosen.
Test
  1. Properly attach the sampling line to the facepiece probe or sampling adapter.
  2. Have the employee attach respirators filters, put on, properly adjust, and wear the respirator 5 minutes BEFORE the fit test. During this time you and the employee must evaluate the respirator's general fit by checking:
    • Proper chin placement
    • Properly tightened straps (do NOT over tighten)
    • Acceptable fit across the nose bridge
    • Respirator size. It must span the distance from nose to chin
    • To see if the respirator stays in position.

Note:

  • Wearing the respirator for 5 minutes permits the employee to make certain the respirator is comfortable AND allows for purging of ambient particles trapped inside the facepiece.
  1. Have the employee perform a seal check. Make sure the sampling line is crimped to avoid leakage during the seal check. If NO leakage is detected, proceed to Step 8. If leakage is detected:
    • Determine the cause

      AND

    • If leakage is due to a poorly fitting facepiece, have the employee:

      -Choose another respirator size or model

      AND

      - Start again at Step 6.

  2. Start the fit test cycle.
    • Follow the manufacturer's instructions for operating the test instrument
    • Have the employee perform the appropriate fit-test exercises in Table 19

      - The test instrument will automatically stop and calculate the overall fit factor. Use this result to determine whether or not the test is passed

      • The test has been PASSED if the overall fit factor is at least 100 for a half facepiece, OR 500 for a full facepiece
      • The test has FAILED if the overall fit factor is below 100 for a half facepiece or 500 for a full facepiece.

Note:

  • If the test has failed, have the employee select another respirator model or size following Table 11 AND repeat this procedure.

       

 

Table 17

Controlled Negative Pressure (CNP) Test Procedure
Important!
  • This is a quantitative fit-test (QNFT) procedure
  • This method determines respirator fit by measuring how much the facepiece leaks when it's subject to a slight negative pressure AFTER various premeasurement activities
  • Measurements occur while employees remain still AND hold their breath for 10 seconds
  • No test aerosols are used. Respirator cartridges aren't needed for this test.
Test Preparations
  1. Make sure the individual conducting the fit test is thoroughly trained to perform this test.
  2. Obtain a CNP test instrument such as a FitTester 3000™. Make sure:
    • Defaults are set at:

      - -15mm (-0.58 inches) of water test pressure

      AND

      - A modeled inspiratory flow rate of 53.8 liters per minute

    • It has an effective audio warning device that signals when employees fail to hold their breath.

Note:

  • You aren't required to obtain test recording and printing equipment such as computers OR printers. Hand recording results is acceptable
  • To see default settings, check the instrument's 'REDON protocol."
  1. Obtain facepiece adapters appropriate for each test respirator.

Note:

  • Adapters are either a one-piece (for SCBA facepieces), OR 2-piece (for dual cartridge facepieces) device providing a manifold and breathing valve system. For positive pressure respirators, you will need to obtain an additional fitting, available from the respirator manufacturer, to convert the facepiece to negative pressure
  • To obtain adapters, contact the CNP instrument's distributor, Occupational Health Dynamics, OR the respirator manufacturer.
Test
Important!

After the test, you must ask the employee about the comfort of the respirator AND if the respirator has become unacceptable, another size of model must be chosen and tested.

  1. Explain the test procedure to the employee.
  2. Train the employee on how to hold a breath for at least 20 seconds.
  3. Prepare the respirator for the fit test as follows:
    • Remove or prop open the inhalation valves. If a breathing tube is present, disconnect it.
    • Replace cartridges, if present, with the manifold and breathing valve adapter

      - For positive pressure facepieces, mount the manufacturer's additional fitting followed by the manifold-breathing valve adapter

    • Connect the respirator to the CNP device according to the CNP instrument manufacturer's directions.
  4. Have the employee put on, adjust, and seal check the respirator.
  5. Turn on the instrument AND have the employee stand and perform the fit-test exercises in Table 19.
  6. Interpret the test results:
    • The test is PASSED IF the overall fit factor obtained is at least 100 for a half facepiece, or at least 500 for a full facepiece
    • The test has FAILED IF the fit factor is less than 100 for a half facepiece, 500 for a full facepiece

      - If the test has FAILED you must have the employee select another respirator model or size following the steps in Table 11 AND repeat this procedure, starting at Step 6.

 

Table 18

Generated Aerosol Test Procedure
Important:
  • This is a quantitative (QNFT) fit-test procedure
  • In this method, a test aerosol is used to challenge the facepiece seal while aerosol concentrations inside and outside the facepiece are measured during test exercises
  • Special equipment is needed to generate, disperse, and measure test aerosols.
Test Preparations
  1. Test aerosol.
    • Use a particulate, for example, corn oil, polyethylene glycol 400, di-2-ethyl hexyl sebacate, or sodium chloride.
  2. Instrumentation.
    • Do ALL the following:

      - Obtain and use aerosol generation, dilution, and measurement systems appropriate for particulates

      - Use an aerosol-generating instrument that will maintain test concentrations within a 10% variation

      - Select a sampling instrument that allows for a computer record or strip chart record to be created

      • The record must show the rise and fall of the test agent concentration during each inhalation and exhalation at fit factors of at least 2000.

Note:

  • Integrators, or computers that integrate the amount of test agent penetration leakage into the respirator for each exercise, may be used if a record of the readings is made.

    - Minimize the time interval between the activity and the recording of the activity so you can clearly connect what you see to what is being recorded. For example, use a small diameter and length of sampling line.

  1. Test enclosure.
    • Do ALL the following:

    - Make sure the enclosure is equipped and constructed to effectively:

    • Maintain a uniform concentration of the test agent inside the enclosure. For example, the enclosure must be large enough to allow ALL employees freedom of movement during testing WITHOUT disturbing the test concentration or measurement instrument
    • Keep the test agent from contaminating the air outside the enclosure. For example, use a HEPA filter to purify exhausted air
    • Allow the individual conducting the fit test to view the employee during the test

    - Make sure the tubing used to collect samples from the enclosure AND respirator is the same material, diameter, AND length. This makes the effect of aerosol loss caused by deposition in each sample line equal.

    - If sodium chloride is used, relative humidity inside the enclosure must be kept below 50%.

  1. Prepare test respirators.
    • Do ALL the following:

    - Inspect test respirators regularly for missing parts AND damage

    - Keep test respirators in proper working order

    - Make sure in-mask sampling probes are:

    • Designed and installed so the air sample will be drawn from the employee's breathing zone; midway between the nose and mouth

      AND

    • The probe extends inside the facepiece at least 1/4 inch

    - Make sure the sampling ports such as probes, or adapters on respirators are constructed and installed so they do NOT:

    • Block air flow into the sampling line
    • Leak
    • Interfere with the respirator's fit or performance
    • Have high efficiency particulate air (HEPA) filters OR P100 series filters available

    - Replace filters when increased breathing resistance is detected OR when the test agent has altered the filter material's integrity.

Test
Important!
  • Throughout the test, maintain the employee's exposure to any test agent below the established exposure limit. Exposures allowed must be based on exposure time and exposure limit duration
  • If a single peak penetration exceeds 5% for half facepieces OR 1% for full facepieces

    - STOP the test

    AND

    - Have the employee select another respirator for testing.

  1. Have the employee attach filters, put on, adjust, and seal check the respirator.
    • Be sure to crimp the sampling line to avoid pressure leaks during the seal check

      AND

    • Have the employee adjust the respirator straps, without assistance, so the fit is comfortable. Do NOT over tighten.
  2. Optional Step. To save time conduct a screening test to quickly identify poorly fitting respirators.

Note:

  • You may use a qualitative screening test OR an ambient aerosol condensation nuclei counter instrument in the count mode.
  1. Make sure test aerosol concentration is reasonably stable.
    • If a canopy or shower curtain enclosure is used, determine stability of the test aerosol concentration AFTER the employee enters the enclosure.
  2. Have the employee enter the test enclosure and connect the respirator to the sample lines.
  3. Immediately after entering the enclosure measure test aerosol concentration inside the respirator.
    • Make sure the peak penetration does NOT exceed 5% for half facepieces, OR 1% for full facepieces.
  4. Have employee perform the appropriate fit-test exercises in Table 19.
    • Do NOT adjust the respirator once exercises begin.
  5. Calculate the overall fit factor as specified in Steps 12-13. The fit test is:
    • PASSED IF the minimum fit factor of 100 for half facepieces OR 500 for full facepieces is obtained

      OR

    • IF a passing fit factor is NOT obtained, the test has FAILED and you must have the employee select and test another respirator.
Calculations
Important:
  • Do NOT count the grimace exercise measurements during these calculations
  • Take into account the limitations of instrument detection when determining fit factors.
  1. Calculate individual fit factors for EACH exercise by applying the following:

    Exercise fit factor (ffE) = Average test enclosure concentration
    _____________________________________________________
    Test aerosol concentration inside the respirator

  • To determine the average test enclosure concentration use one of the following methods:

    - Arithmetic average of the concentration before and after each test (an average of two values per entire test)

    - Arithmetic average of concentration before and after each exercise (an average of two values per exercise)

    - True average measured continuously during the respirator sample

  • Determine the test aerosol concentration inside the respirator in one of the following ways:
  • - Average peak penetration values. Determine aerosol penetration for each exercise by:

    • Using integrators or computers that calculate the actual test agent penetration
      OR
    • Average peak heights shown on the strip chart recording, graph, or by computer integration

    - Maximum peak penetration. Use strip chart recordings to determine the highest peak penetration for each exercise and use this value

    - Areas under the peaks. Use computerized integration or other appropriate calculations to integrate the area under individual peaks for each exercise.

  1. Using individual exercise fit factors (ffE) calculate the overall fit factor by doing ALL of the following:
    • Convert each exercise fit factor to a penetration value
    • Determine the average penetration value
    • Convert the average penetration value back to a fit factor

      OR

    • Use this equation to calculate the overall fit factor:
  2. Overall fit factor:

    n
    ________________________________

    1/ffE1 + 1/ffE2 + 1/ffE3... + 1/ffEn

 

Table 19

Fit-Test Exercises

Important:

  • This list applies when you use any fit test
  • Employees tested must perform ALL exercises marked with an "X" as described for the fit-test procedure used

    -Once exercises begin, any adjustments made void the test AND you must begin again

    - After test exercises are completed, you must ask the employee about the comfort of the respirator. If it has become unacceptable, have the employee choose another one for fit testing

  • When the controlled negative pressure procedure in used, STOP and repeat the test if the employee adjusts the respirator OR takes a breath and fails to hold it for 10 seconds
  • Controlled negative pressure tests conducted according to the method published in 29 CFR 1910.134, Appendix A are an acceptable alternative to the method outlined below.
Description of Required Fit-Test Exercises
Fit Test Procedures
Qualitative Procedures
Quantitative Procedures; EXCEPT the CNPP
Controlled Negative Pressure Procedure (CNPP)
  • Normal breathing

    - Breathe normally, while standing for one minute

X
X
  • Deep breathing

    - Breathe slowly and deeply while standing for one minute

    - Take caution to avoid hyperventillating

X
X
  • Head side to side

    - Slowly turn head from side to side while standing for one minute, pausing at each extreme position to inhale

    - Be careful NOT bump the respirator

X
X
  • Head up and down

    -Slowly move head up and down while standing for one minute, inhaling in the up position

    - Be careful to NOT bump the respirator

X
X
  • Talking

    - Talk slowly and loud enough to be heard clearly by the individual conducting fit testing for one minute. Choose ONE of the following:

    • Read from a prepared text such as the Rainbow Passage1
    • Count backward from 100
    • Recite a memorized poem or song
X
X
  • Grimace

    - Smile or frown for 15 seconds

X
  • Bending over

    - Bend over to touch toes while standing. Repeat at a comfortable pace for one minute

    OR

    - Jog in place for one minute if the test enclosure, such as a hood, does not permit bending over

X
X
  • Normal breathing

    - Breathe normally while standing for one minute

X
X
  • Face forward

    - Premeasurement activity: Stand and breathe normally, without talking

    - Measurement position: Face forward while holding breath for 10 seconds

   
X
  • Bending over

    - Premeasurement activity: While standing, bend over to touch toes

    - Measurement position: Hold the bending position with face parallel to the floor while holding breath for 10 seconds

X
  • Head shaking

    - Premeasurement activity: Vigorously shake head from side to side for 3 seconds while shouting or making the sound of "BRRRR" loudly

    - MEASUREMENT POSITION: Face forward, while holding breath for 10 seconds

X
  • Redon-1

    - Premeasurement activity: Remove the respirator completely and put it back on

    - Measurement position: Face forward while holding breath for 10 seconds

X
  • Redon-2

    - Repeat the premeasurement activity and measurement position described in Redon-1

X

 

1The Rainbow Passage:

“When the sunlight strikes raindrops in the air, they act like a prism and form a rainbow. The rainbow is a division of white light into many beautiful colors. These take the shape of a long round arch, with its path high above, and its two ends apparently beyond the horizon. There is, according to legend, a boiling pot of gold at one end. People look, but no one ever finds it. When a man looks for something beyond reach, his friends say he is looking for the pot of gold at the end of the rainbow.”

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-62010, filed 12/21/04, effective 04/02/05.]

WAC 296-307-62015

Follow procedures established for cleaning and disinfecting respirators.

You must

• Follow the procedure in Table 20 for cleaning and disinfecting respirators.

Table 20
Respirator Cleaning Procedure

Step
Task
1.

Remove filters, cartridges, canisters, speaking diaphragms, demand and pressure valve assemblies, hoses, or any components recommended by the manufacturer.

  • Discard or repair any defective parts.
2.

Wash components in warm (43°C (110°F) maximum) water with a mild detergent or with a cleaner recommended by the manufacturer

  • A stiff bristle (not wire) brush may be used to help remove the dirt
  • If the detergent or cleaner doesn't contain a disinfecting agent, respirator components should be immersed for 2 minutes in one of the following:

    - A bleach solution (concentration of 50 parts per million of chlorine). Make this by adding approximately one milliliter of laundry bleach to one liter of water at 43°C (110°F)

    - A solution of iodine (50 parts per million iodine). Make this in two steps:

    • First, make a tincture of iodine by adding 6-8 grams of solid ammonium iodide and/or potassium iodide to 100 cc of 45% alcohol approximately
    • Second, add 0.8 millileters of the tincture to one liter of water at 43°C (110°F) to get the final solution.

    - Other commercially available cleansers of equivalent disinfectant quality when used as directed, if their use is recommended or approved by the respirator manufacturer.

3.

Rinse components thoroughly in clean (43°C (110°F) maximum), preferably, running water.

Note:

The importance of thorough rinsing can't be overemphasized. Detergents or disinfectants that dry on facepieces could cause dermatitis. In addition, some disinfectants may cause deterioration of rubber or corrosion of metal parts, if not completely removed

4.
Drain components.
5.
Air-dry components or hand dry components with a clean, lint-free cloth.
6.

Reassemble the facepiece components

  • Replace filters, cartridges, canisters, if necessary (for testing).
7.
Test the respirator to make sure all components work properly.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-62015, filed 12/21/04, effective 04/02/05.]

WAC 296-307-62020

Follow procedures established for seal checking respirators.

Important:

  • User seal checks are NOT a substitute for fit tests. See WAC 296-307-62010 for fit test procedures.
  • You may use a seal check procedure recommended by the respirator manufacturer INSTEAD of the procedure outlined in Table 21 if you can demonstrate the procedure is based on a scientific study that, for example, demonstrates the procedure effectively identifies respirators that fit poorly when put on or adjusted.

You must

  • Make sure employees perform a user seal check as outlined in Table 21, EACH TIME the respirator is worn, to make sure the seal is adequate.

Table 21

User Seal Check Procedure

Important information for employees:

  • You need to conduct a seal check each time you put your respirator on BEFORE you enter the respirator use area. The purpose of a seal check is to make sure your respirator (which has been previously fit tested by your employer) is properly positioned on your face to prevent leakage during use and to detect functional problems
  • The procedure below has two parts; a positive pressure check and a negative pressure check. You must complete both parts each time. It should only take a few seconds to perform, once you learn it

    - If you can't pass both parts, your respirator is NOT functioning properly, see your supervisor for further instruction.

Positive pressure check:

  1. Remove exhalation valve cover, if removable.
  2. Cover the exhalation valve completely with the palm of your hand WHILE exhaling gently to inflate the facepiece slightly.
  3. The respirator facepiece should remain inflated (indicating a build-up of positive pressure and NO outward leakage).
    • If you detect NO leakage, replace the exhalation valve cover (if removed), and proceed to conduct the negative pressure check
    • If you detect evidence of leakage, reposition the respirator (after removing and inspecting it), and try the positive pressure check again.

Negative pressure check:

  1. Completely cover the inhalation opening(s) on the cartridges or canister with the palm(s) of your hands WHILE inhaling gently to collapse the facepiece slightly.
    • If you can't use the palm(s) of your hands to effectively cover the inhalation openings on cartridges or canisters, you may use:

      - Filter seal(s) (if available)

      OR

      - Thin rubber gloves.

  2. Once the facepiece is collapsed, hold your breath for 10 seconds WHILE keeping the inhalation openings covered.
  3. The facepiece should remain slightly collapsed (indicating negative pressure and NO inward leakage).
    • If you detect NO evidence of leakage, the tightness of the facepiece is considered adequate, the procedure is completed, and you may now use the respirator.
    • If you dected leakage, reposition the respirator (after removing and inspecting it) and repeat BOTH the positive and negative fit checks.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-62020, filed 12/21/04, effective 04/02/05.]

WAC 296-307-622

Definitions.

Air-purifying respirator (APR)

A respirator equipped with an air-purifying element such as a filter, cartridge, or canister, OR having a filtering facepiece, for example, a dust mask.

The element or filtering facepiece is designed to remove specific contaminants, such as particles, vapors, or gases, from air that passes through it.

Air-line respirator

An atmosphere-supplying respirator for which breathing air is drawn from a source separate from and not worn by the user, such as:

• A cylinder or a tank

• A compressor

• An uncontaminated environment.

Air supplied respirator

(see air-line respirator)

Assigned protection factor (APF)

Indicates the expected level of workplace respiratory protection WHEN the respirator is:

• Functioning properly

AND

• Fitted to the user

AND

• Worn by trained individuals

AND

• Used with the limitations specified on the NIOSH approval label.

Atmosphere-supplying respirator

A respirator that supplies the user with breathing air from sources, such as:

• A cylinder or a tank

• A compressor

• An uncontaminated environment.

Breathing air

Air supplied to an atmosphere-supplying respirator. This air meets the specifications found in WAC 296-307-616.

Canister or cartridge (air-purifying)

Part of an air-purifying respirator that consists of a container holding materials such as fiber, treated charcoal, or a combination of the two, that removes contaminants from the air passing through the cartridge or canister.

Cartridge respirator (see also air-purifying respirator)

An air-purifying respirator equipped with one or more cartridges. These respirators have a facepiece made from silicone, rubber OR other plastic-like materials.

Demand respirator

An atmosphere-supplying respirator that sends breathing air to the facepiece only when suction (negative pressure) is created inside the facepiece by inhalation. Demand respirators are “negative pressure” respirators.

Dust mask

A name used to refer to filtering-facepiece respirators. Dust masks may or may not be NIOSH certified. See filtering facepiece.

Emergency respirator

Respirators suitable for rescue, escape, or other activities during emergency situations.

Emergency situation

Any occurrence that could OR does result in a significant uncontrolled release of an airborne contaminant. Causes of emergency situations include, but are not limited to, equipment failure, rupture of containers, or failure of control equipment.


End-of-service-life indicator (ESLI)

A system that warns the air-purifying respirator user that cartridges or canisters must be changed. An example of an ESLI is a dot on the respirator cartridge that changes color.

Escape-only respirator

A respirator that can only be used to exit during emergencies. Look for this use limitation on the respirator's NIOSH approval label.

Exposed, or exposure

The contact an employee has with a toxic substance, harmful physical agent, or oxygen deficient condition. Exposure can occur through various routes of entry, such as inhalation, ingestion, skin contact, or skin absorption.

Filter

Fibrous material that removes dust, spray, mist, fume, fog, smoke particles, OR other aerosols from the air.

Filtering-facepiece respirator

A tight-fitting, half-facepiece, negative-pressure, particulate air-purifying respirator with the facepiece MAINLY composed of filter material. These respirators don’t use cartridges or canisters and may have sealing surfaces composed of rubber, silicone or other plastic-like materials. They are sometimes referred to as “dust masks.”

Fit factor

A number providing an estimate of fit for a particular respiratory inlet covering to a specific individual during quantitative fit testing.

Fit test (see also qualitative fit test and quantitative fit test)

Fit testing is an activity where the facepiece seal of a respirator is challenged, using a WISHA accepted procedure, to determine if the respirator provides an adequate seal.

Full-facepiece respirator

A tight-fitting respirator that covers the wearer's nose, mouth, and eyes.

Gas mask

An air-purifying respirator equipped with one or more canisters. These respirators have a facepiece made from silicone, rubber OR other plastic-like materials.

Half-facepiece respirator

A tight-fitting respirator that only covers the wearer's nose and mouth.

Helmet

The rigid part of a respirator that covers the wearer's head AND also provides head protection against impact or penetration.

High-efficiency particulate air filter (HEPA)

A powered air purifying respirator (PAPR) filter that removes at least 99.97% of monodisperse dioctyl phthalate (DOP) particles with a mean particle diameter of 0.3 micrometer from contaminated air.

Note: Filters designated, under 42 CFR Part 84, as an “N100,” “R100,” or “P100” provide the same filter efficiency (99.97%) as HEPA filters.

Hood

The part of a respirator that completely covers the wearer's head and neck and may also cover some or all of the shoulders and torso.

Immediately dangerous to life or health (IDLH)

An atmospheric condition that would:

• Cause an immediate threat to life

OR

• Cause permanent or delayed adverse health effects

OR

• Interfere with an employee's ability to escape.

Licensed healthcare professional (LHCP)

An individual whose legally permitted scope of medical practice allows him or her to provide SOME OR ALL of the healthcare services required for respirator users' medical evaluations.

Loose-fitting facepiece

A respiratory inlet covering that is designed to form a partial seal with the face.

Negative-pressure respirator

Any tight-fitting respirator in which the air pressure inside the facepiece is less than the air pressure outside the respirator during inhalation.

NIOSH

The National Institute for Occupational Safety and Health. NIOSH is the federal agency that certifies respirators for occupational use.

Oxygen deficient

An atmosphere with an oxygen content below 19.5% by volume.

Permissible exposure limit (PEL)

Permissible exposure limits (PELs) are employee exposures to toxic substances or harmful agents that must not be exceeded. PELs are specified in applicable WISHA chapters.

Positive-pressure respirator

A respirator in which the air pressure inside the respiratory-inlet covering is greater than the air pressure outside the respirator.

Powered air-purifying respirators (PAPRs)

An air-purifying respirator equipped with a blower that draws ambient air through cartridges or canisters. These respirators, as a group, are NOT classified as positive pressure respirators and must not be used as such.

Pressure-demand respirator

A positive-pressure atmosphere-supplying respirator that sends breathing air to the respiratory inlet covering when the positive pressure is reduced inside the facepiece by inhalation or leakage.

Qualitative fit test (QLFT)

A test that determines the adequacy of respirator fit for an individual. The test relies on the employee's ability to detect a test substance. Test results are either “pass” or “fail.”

Quantitative fit test (QNFT)

A test that determines the adequacy of respirator fit for an individual. The test relies on specialized equipment that performs numeric measurements of leakage into the respiratory inlet covering. Test results are used to calculate a “fit factor.”

Respiratory hazard

Harmful airborne hazards and oxygen deficiency that are addressed in WAC 296-307-624, Identifying and controlling airborne hazards and oxygen deficiency.

Required use

Respirator use:

• That is necessary to protect employees from respiratory hazards

OR

• That the employer decides to require for his or her own reasons. For example, the employer decides to follow more rigorous exposure limits

• The employer for his or her own reasons. For example, the employer decides to follow more rigorous exposure limits, or the employer is required to follow a medical recommendation.

Respirator

A type of personal protective equipment designed to protect the wearer from harmful airborne hazards, oxygen deficiency, or both.

Respiratory inlet covering

The part of a respirator that forms the protective barrier between the user's respiratory tract and an air-purifying device or breathing air source or both. The respiratory inlet covering may be a facepiece, helmet, hood, suit, or mouthpiece respirator with nose clamp.

Seal check

Actions conducted by the respirator user each time the respirator is put on, to determine if the respirator is properly seated on the face.

Self-contained breathing apparatus (SCBA)

An atmosphere-supplying respirator designed for the breathing air source, to be carried by the user.

Service-life

The period of time that a respirator, filter or sorbent, or other respiratory equipment provides adequate protection to the wearer. For example, the period of time that sorbent cartridge is effective for removing a harmful substance from the air.

Sorbent

Rigid, porous material, such as charcoal, used to remove vapor or gas from the air.

Supplied-air respirator (see air-line respirator)

Tight-fitting facepiece

A respiratory inlet covering forming a complete seal with the face OR neck. Mouthpiece respirators aren't tight-fitting facepieces.

Voluntary use

Respirator use that is requested by the employee AND permitted by the employer when NO respiratory hazard exists.

[Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-01-166 (Order 04-19), § 296-307-622, filed 12/21/04, effective 04/02/05.]

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