assigned protection factors for the revised respiratory protection

Assigned Protection Factorsfor the Revised Respiratory

Protection Standard

OSHA 3352-02 2009

Employers are responsible for providing a safe andhealthy workplace for their employees. OSHA’s roleis to promote the safety and health of America’sworking men and women by setting and enforcingstandards; providing training, outreach and education;establishing partnerships; and encouraging continualimprovement in workplace safety and health.

This publication provides a general overview of aparticular standards-related topic. This publicationdoes not alter or determine compliance responsibili-ties which are set forth in OSHA standards, and theOccupational Safety and Health Act. Moreover, be-cause interpretations and enforcement policy maychange over time, for additional guidance on OSHAcompliance requirements the reader should consultcurrent administrative interpretations and decisionsby the Occupational Safety and Health Review Com-mission and the courts.

Material contained in this publication is in the publicdomain and may be reproduced, fully or partially,without permission. Source credit is requested butnot required.

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Assigned Protection Factorsfor the

Revised Respiratory Protection Standard

Occupational Safety and HealthAdministrationU.S. Department of Labor

OSHA 3352-022009

Original cover Illustrations created by Attiliis & Associates

ContentsIntroduction 3

The Audience for this Guide 3

How to Use this Guide 3

History 3

Assigned Protection Factors (APFs)and Maximum Use Concentrations(MUCs) 3

How to Use APFs and MUCs 4

Major Types of Respirators 5

Attachment AGlossary 7

Attachment BRegulatory Text of theRespiratory Protection Standard 10

Permissible practice 10

Definitions 10

Respiratory protection program 12

Selection of respirators 13

Table I: Assigned Protection Factors 14

Table II: Oxygen Deficient Atmospheres 15

Medical evaluation 15

Fit testing 17

Use of respirators 17

Maintenance and care of respirators 19

Breathing air quality and use 20

Identification of filters, cartridges,and canisters 21

Training and information 21

Program evaluation 22

Recordkeeping 22

Effective date 23

Appendices 23

Appendix A to §1910.134:FitTesting Procedures (Mandatory) 24

Appendix B-1 to §1910.134:User Seal Check Procedures(Mandatory) 37

Appendix B-2 to §1910.134:Respiratory Cleaning Procedures(Mandatory) 38

Appendix C to §1910.134:OSHA Respiratory Medical EvaluationQuestionnaire (Mandatory) 39

Appendix D to §1910.134:Information for Employees UsingRespirators When Not Required Underthe Standard (Mandatory) 43

OSHAAssistance 44

OSHA Regional Offices 47

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Occupational Safety andHealth Administration

Introduction

In a final rule on Assigned Protection Factors (APFs),OSHA revised its existing Respiratory Protectionstandard to add definitions and requirements for APFsand Maximum Use Concentrations (MUCs). (See 63FR 1152; 29 CFR 1910.134; 71 FR 50122, August 24,2006.) This guidance document focuses on themandatory selection provisions of the APFs, MUCs,and Table I 1 at page 14 and their role in the overallRespiratory Protection standard. The provisions canonly be used when respirators are properly selectedand used in compliance with the full Respiratory Pro-tection standard. The final Respiratory Protectionstandard (29 CFR 1910.134 and 29 CFR 1926.103) ap-plies to general industry, construction, longshoring,shipyard, and marine terminal workplaces.

The Agency developed the final APFs after thor-oughly reviewing the available literature, includingworkplace protection factor studies, comments sub-mitted to the record, and hearing testimony. Thefinal APFs provide employers with critical informa-tion to use when selecting respirators for employeesexposed to atmospheric contaminants found in in-dustry. Proper respirator selection is an importantcomponent of an effective respiratory protection pro-gram. Accordingly, the final APFs are necessary toprotect employees who must use respirators to pro-tect them from airborne contaminants.

The Audience for this Guide

The employer should read this guide if it is likely thatyou will need to establish and implement a respira-tory protection program.

How to Use this Guide

This guide is divided into sections that correspond tothe recently updated respirator selection provisionsunder section (d) of the Respiratory Protection stan-dard. Specifically, these provisions are (d)(3)(i)(A)and (d)(3)(i)(B). This guide provides information thatanswers the following questions: What are AssignedProtection Factors (APFs)?; What are Maximum UseConcentrations (MUCs)?; and How to Use APFs andMUCs?

Two attachments are provided. Attachment A is theglossary of the final APF rule; and, Attachment B isthe complete final Respiratory Protection standard.The brown colored type denotes that the provisionsof the final Respiratory Protection standard are beingused.

History

In a final rule on OSHA’s Respiratory Protection stan-dard, OSHA reserved the provisions incorporatingAPFs, MUCs, and the APF Table, for further rulemak-ing. (See 63 FR 1152; 29 CFR 1910.134; 71 FR 50122,August 24, 2006.) The APF final standard went intoeffect on November 22, 2006 (71 FR 50122).

OSHA’s methodology for assigning protection fac-tors to classes of respirators was twofold: first,OSHA analyzed all the data, and second, OSHA re-viewed all the literature. By analyzing all availablestatistical data and literature, OSHA is assured thatthe Agency is measuring and observing the out-comes that are of concern to OSHA. That is, OSHA isobserving and measuring the outcomes achievedwhen employers are in compliance with the full Res-piratory Protection standard. Thus, OSHA has actedin a rigorous manner in establishing the APFs.

Assigned Protection Factors (APFs)and Maximum Use Concentrations(MUCs)

The rulemaking on the reserved sections of the Res-piratory Protection standard have now been com-pleted (71 FR 50122; August 24, 2006). These coverprovisions for APFs and MUCs, as well as Table I.

The definitions of APFs and MUCs are:

Assigned Protection Factor (APF) means the work-place level of respiratory protection that a respiratoror class of respirators is expected to provide to em-ployees when the employer implements a continu-ing, effective respiratory protection program asspecified by this section.

Maximum Use Concentration (MUC) means themaximum atmospheric concentration of a hazardoussubstance from which an employee can be expectedto be protected when wearing a respirator, and is de-termined by the assigned protection factor of the res-pirator or class of respirators and the exposure limitof the hazardous substance. The MUC usually can bedetermined mathematically by multiplying the as-signed protection factor specified for a respirator bythe permissible exposure limit (PEL), short-term ex-posure limit, ceiling limit, peak limit, or any other ex-posure limit used for the hazardous substance.

The MUC for respirators is calculated by multiplyingthe APF for the respirator by the PEL. The MUC is

A S S I G N E D P R O T E C T I O N F A C T O R S F O R T H ER E V I S E D R E S P I R A T O R Y P R O T E C T I O N S T A N D A R D

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the upper limit at which the class of respirator is ex-pected to provide protection. Whenever the expo-sures approach the MUC, then the employer shouldselect the next higher class of respirators for the em-ployees.

Employers must not apply MUCs to conditions thatare immediately dangerous to life or health (IDLH);instead, they must use respirators listed for IDLHconditions in paragraph (d)(2) of this standard.When the calculated MUC exceeds the IDLH level fora hazardous substance, or the performance limits ofthe cartridge or canister, then employers must setthe maximum MUC at that lower limit.

How to use APFs and MUCsUnder the Respiratory Protection standard, APFsand MUCs are used specifically in selecting properequipment under section (d)(3), which addresses theselection of respiratory protection equipment fornon-IDLH atmospheres. In this provision, under(d)(3)(i), employers must provide respirators that areadequate to protect employee health and ensurecompliance with all other OSHA requirements underroutine, and reasonably foreseeable, emergency sit-uations.

Under paragraph (d)(3)(i)(A), employers must selectrespirators according to APFs, using Table I: AssignedProtection Factors. Under paragraph (d)(3)(i)(B), em-ployers must select respirators after considering theMUCs in their workplace under which respirators areto be used.

APFs are used to select the appropriate class of res-pirators that will provide the necessary level of pro-tection. The airborne hazardous exposure can befrom a particulate or a gas or vapor. The APF for theclass of respirators will remain the same. The APFvalue can only be applied to a class of respiratorswhen the respirators are properly selected and usedin compliance with the Respiratory Protection stan-dard (29 CFR 1910.134), with properly selected filtersor canisters, as needed.

The new APF table is on page 14.

Under paragraph (d)(3)(ii), employers must selectrespirators (using APFs as well) that are appropriatefor the chemical state and physical form of the con-

taminant. You need different types of filters, car-tridges, and canisters depending on whether dusts,fumes, mists, vapors, or gases are present in yourworkplace and depending on the kinds and concen-trations of the substances present.

Respiratory hazards may be present in the workplacewhenever an atmosphere does not contain sufficientoxygen, or if it contains chemical, biological, or radi-ological contaminants in sufficient quantity to harmthe health of employees. Respiratory hazards may bepresent in the workplace in the following physicalforms:

Dusts and fibers are solid particles that are formedor generated from solid materials through mechani-cal processes such as crushing, grinding, drilling,abrading or blasting. Examples are lead, silica, andasbestos.

Fumes are solid particles that are formed when ametal or other solid vaporizes and the moleculescondense (or solidify) in cool air. Examples are metalfumes from smelting or welding. Fumes also may beformed from processes such as plastic injection orextrusion molding.

Mists are tiny droplets of liquid suspended in the air.Examples are oil mist produced from lubricants usedin metal cutting operations, acid mists from electro-plating, and paint spray mist from spraying opera-tions.

Gases are materials that exist as individual moleculesin the air at room temperature. Examples are weld-ing gases, such as acetylene and nitrogen, and car-bon monoxide produced from internal combustionengines.

Vapors are the gaseous form of substances that arenormally in the solid or liquid state at room tempera-ture and pressure. They are formed by evaporation.Most solvents produce vapors. Examples includetoluene and methylene chloride.

Biological hazards include bacteria, viruses, fungi,and other living organisms that are respirable andcan cause acute and chronic infections. Examples in-clude Legionnaire’s Disease and animal waste prod-ucts (e.g., feces).

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Major Types of RespiratorsAir-purifying respirators,which remove contaminants from the air.

Full facepiece (Elastomeric)APF=50Needs to be fit tested

Half mask/Dust maskAPF=10Needs to be fit tested

Half mask (Elastomeric)APF=10Needs to be fit tested

Loose-Fitting PoweredAir-Purifying Respirator (PAPR)APF= 25

Hood PoweredAir-PurifyingRespirator (PAPR)APF= 25

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Atmosphere-supplying respirators, which provide clean air from an uncontaminated source.

Full Facepiece Supplied-Air Respirator (SAR)with an auxiliary Escape BottleAPF=1,000APF = 10,000 (if used in “escape” mode)Needs to be fit tested

Full Facepiece Self-ContainedBreathingApparatus (SCBA)Pressure demand mode is APF=10,000Needs to be fit tested

Full FacepieceAbrasive BlastingContinuous FlowAPF=1,000Needs to be fit tested

Attachment AGlossary

At the beginning of the final rule for Assigned Pro-tection Factors (APF), in a separate glossary, thereare lists for both acronyms and common terms usedthroughout the preamble to the final APF rule. (See63 FR 1152; 29 CFR 1910.134; 71 FR 50122, August24, 2006). The glossary is provided as an auxiliary listfor terms used both in the APF rulemaking as well asthroughout the preamble to the APF final rule. Thisglossary is in addition to the definitions in the APFrulemaking for Assigned Protection Factor and Maxi-mum Use Concentration (MUC). The glossary con-tains legally defined terms from the final RespiratoryProtection standard (29 CFR 1910.134 and 29 CFR1926.103) each of which is highlighted with an as-terisk (*). The purpose of this glossary and list ofacronyms is to provide the terms that have alreadybeen defined by the Respiratory Protection standard,in one place, along with the terms from the final APFrule in order to facilitate their use and review.

This glossary specifies the terms represented byacronyms and provides definitions of other termsused frequently in the preamble to the final rule.This glossary does not change the legal require-ments in this final rule nor is it intended to imposenew regulatory requirements on the regulated com-munity.

Acronyms

ACGIH American Conference of GovernmentalIndustrial Hygienists

AIHA American Industrial Hygiene Association

ANSI American National Standards Institute

APF Assigned Protection Factor

APR Air-purifying respirator

Ci Concentration measured inside therespirator facepiece

Co Concentration measured outside therespirator

DOP Dioctylphthalate (see definition at page 8)

DFM Dust, fume, and mist filter

EPF Effective Protection Factor (see definitionat page 9)

HEPA High efficiency particulate air filter (seedefinition at page 8)

IDLH Immediately dangerous to life or health(see definition at page 8, and under theRespiratory Protection standard)

LANL Los Alamos National Laboratory

LASL Los Alamos Scientific Laboratory

LLNL Lawrence Livermore National Laboratory

MSHA Mine Safety and Health Administration

MUC Maximum Use Concentration

NFPA National Fire Protection Association

NIOSH National Institute for Occupational Safetyand Health

NRC Nuclear Regulatory Commission

OSHA Occupational Safety and HealthAdministration

OSH Act Occupational Safety and Health Act of1970 (29 U.S.C. 655, 657, 665).

PAPR Powered air-purifying respirator (seedefinition in the standard below)

PEL Permissible Exposure Limit

PPF Program Protection Factor (see definitionat page 8)

QLFT Qualitative fit test (see definition at page 9)

QNFT Quantitative fit test (see definition at page9)

RDL Respirator Decision Logic (see definitionat page 9)

REL Recommended Exposure Limit (seedefinition at page 9)

SAR Supplied-air (or airline) respirator (seedefinition at page 9)

SCBA Self-contained breathing apparatus (seedefinition at page 9)

WPF Workplace Protection Factor (seedefinition at page 9)

TLV Threshold Limit Value (see definitionat page 9)

SWPF Simulated Workplace Protection Factor(see definition at page 9)


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DefinitionsTerms preceded by an asterisk (*) refer to definitionsthat can be found in paragraph (b) (“Definitions”) ofOSHA’s Respiratory Protection standard (29 CFR1910.134).

*Air-purifying respirator: A respirator with an air-pu-rifying filter, cartridge, or canister that removes spe-cific air contaminants by passing ambient airthrough the air-purifying element.

*Atmosphere-supplying respirator: A respirator thatsupplies the respirator user with breathing air from asource independent of the ambient atmosphere, andincludes SARs and SCBA units.

*Canister or cartridge: A container with a filter, sor-bent, or catalyst, or combination of these items,which removes specific contaminants from the airpassed through the container.

Continuous flow respirator: An atmosphere-supply-ing respirator that provides a continuous flow ofbreathable air to the respirator facepiece.

*Demand respirator: An atmosphere-supplying res-pirator that admits breathing air to the facepiece onlywhen a negative pressure is created inside the face-piece by inhalation.

Dioctylphthalate (DOP): An aerosolized agent usedfor quantitative fit testing.

Elastomeric: A respirator facepiece made of a natu-ral or synthetic elastic material such as natural rub-ber, silicone, or EPDM rubber.

*Filter or air-purifying element: A component usedin respirators to remove solid or liquid aerosols fromthe inspired air.

*Filtering facepiece (or dust mask): A negative pres-sure particulate respirator with a filter as an integralpart of the facepiece or with the entire facepiececomposed of the filtering medium.

*Fit factor: A quantitative estimate of the fit of a par-ticular respirator to a specific individual and typicallyestimates the ratio of the concentration of a sub-stance in ambient air to its concentration inside therespirator when worn.

*Fit test: The use of a protocol to qualitatively orquantitatively evaluate the fit of a respirator on an in-dividual.

*Helmet: A rigid respiratory inlet covering that alsoprovides head protection against impact and pene-tration.

*High efficiency particulate air filter (HEPA): A filterthat is at least 99.97% efficient in removing monodis-perse particles of 0.3 micrometers in diameter. Theequivalent NIOSH 42 CFR 84 particulate filters are theN100, R100, and P100 filters.

*Hood: A respiratory inlet covering that completelycovers the head and neck and may also cover por-tions of the shoulders and torso.

*Immediately dangerous to life or health (IDLH): Anatmosphere that poses an immediate threat to life,would cause irreversible adverse health effects, orwould impair an individual’s ability to escape from adangerous atmosphere.

*Loose-fitting facepiece: A respiratory inlet coveringthat is designed to form a partial seal with the face.

*Negative pressure respirator (tight-fitting): A respi-rator in which the air pressure inside the facepiece isnegative during inhalation with respect to the ambi-ent air pressure outside the respirator.

Permissible Exposure Limit (PEL): An occupationalexposure limit specified by OSHA.

*Positive pressure respirator: A respirator in whichthe pressure inside the respiratory inlet covering ex-ceeds the ambient air pressure outside the respirator.

*Powered air-purifying respirator (PAPR): An air-puri-fying respirator that uses a blower to force the ambi-ent air through air-purifying elements to the inletcovering.

*Pressure demand respirator: A positive pressure at-mosphere-supplying respirator that admits breathingair to the facepiece when the positive pressure is re-duced inside the facepiece by inhalation.

Protection factor study: A study that determines theprotection provided by a respirator during use. Thisdetermination generally is accomplished by measur-ing the ratio of the concentration of an airborne con-taminant (e.g., hazardous substance) outside therespirator (Co) to the concentration inside the respi-rator (Ci) (i.e., Co/Ci). Therefore, as the ratio betweenCo and Ci increases, the protection factor increases,indicating an increase in the level of protection pro-

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vided to employees by the respirator. Four types ofprotection factor studies are:

Effective Protection Factor (EPF) study - a study,conducted in the workplace, that measures theprotection provided by a properly selected, fittested, and functioning respirator when used in-termittently for only some fraction of the totalworkplace exposure time (i.e., sampling is con-ducted during periods when respirators are wornand not worn). EPFs are not directly comparableto WPF values because the determinations in-clude both the time spent in contaminated atmos-pheres with and without respiratory protection;therefore, EPFs usually underestimate the protec-tion afforded by a respirator that is used continu-ously in the workplace.

Program Protection Factor (PPF) study - a studythat estimates the protection provided by a respi-rator within a specific respirator program. Like theEPF, it is focused not only on the respirator’s per-formance, but also the effectiveness of the com-plete respirator program. PPFs are affected by allfactors of the program, including respirator selec-tion and maintenance, user training and motiva-tion, work activities, and program administration.

Workplace Protection Factor (WPF) study - astudy, conducted under actual conditions of usein the workplace, that measures the protectionprovided by a properly selected, fit tested, andfunctioning respirator, when the respirator isworn correctly and used as part of a comprehen-sive respirator program that is in compliance withOSHA’s Respiratory Protection standard at 29CFR 1910.134. Measurements of Co and Ci areobtained only while the respirator is being wornduring performance of normal work tasks (i.e.,samples are not collected when the respirator isnot being worn). As the degree of protection af-forded by the respirator increases, the WPF in-creases.

SimulatedWorkplace Protection Factor (SWPF)study - a study, conducted in a controlled labora-tory setting and in which Co and Ci sampling isperformed while the respirator user performs aseries of set exercises. The laboratory setting isused to control many of the variables found inworkplace studies, while the exercises simulatethe work activities of respirator users. This typeof study is designed to determine the optimumperformance of respirators by reducing the im-pact of sources of variability through maintenanceof tightly controlled study conditions.

*Qualitative fit test (QLFT): A pass/fail fit test to as-sess the adequacy of respirator fit that relies on theindividual’s response to the test agent.

*Quantitative fit test (QNFT): An assessment of theadequacy of respirator fit by numerically measuringthe amount of leakage into the respirator.

Recommended Exposure Limit (REL): An occupa-tional exposure level recommended by NIOSH.

Respirator Decision Logic (RDL): Respirator selectionguidance developed by NIOSH that contains a set ofrespirator protection factors.

*Self-contained breathing apparatus (SCBA): An at-mosphere-supplying respirator for which the breath-ing air source is designed to be carried by the user.

*Supplied-air respirator (or airline) respirator (SAR):An atmosphere-supplying respirator for which thesource of breathing air is not designed to be carriedby the user.

Threshold LimitValue (TLV): An occupational expo-sure level recommended by ACGIH.

*Tight-fitting facepiece: A respiratory inlet coveringthat forms a complete seal with the face.


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Attachment BRegulatoryText of the RespiratoryProtection Standard

For additional information about proper selectionand use of respiratory protection, see the final Respi-ratory Protection standard (29 CFR 1910.134), below.

1910.134(a)Permissible practice.

1910.134(a)(1)In the control of those occupational diseases causedby breathing air contaminated with harmful dusts,fogs, fumes, mists, gases, smokes, sprays, or vapors,the primary objective shall be to prevent atmos-pheric contamination. This shall be accomplished asfar as feasible by accepted engineering controlmeasures (for example, enclosure or confinement ofthe operation, general and local ventilation, and sub-stitution of less toxic materials). When effective engi-neering controls are not feasible, or while they arebeing instituted, appropriate respirators shall beused pursuant to this section.

1910.134(a)(2)Respirators shall be provided by the employer whensuch equipment is necessary to protect the health ofthe employee. The employer shall provide the respi-rators which are applicable and suitable for the pur-pose intended. The employer shall be responsible forthe establishment and maintenance of a respiratoryprotection program which shall include the require-ments outlined in paragraph (c) of this section.

1910.134(b)Definitions.The following definitions are important terms usedin the respiratory protection standard in this section.

Air-purifying respirator means a respirator with anair-purifying filter, cartridge, or canister that removesspecific air contaminants by passing ambient airthrough the air-purifying element.

Assigned protection factor (APF) means the work-place level of respiratory protection that a respiratoror class of respirators is expected to provide to em-ployees when the employer implements a continu-ing, effective respiratory protection program asspecified by this section.

Atmosphere-supplying respirator means a respiratorthat supplies the respirator user with breathing airfrom a source independent of the ambient atmos-

phere, and includes supplied-air respirators (SARs)and self-contained breathing apparatus (SCBA) units.

Canister or cartridge means a container with a filter,sorbent, or catalyst, or combination of these items,which removes specific contaminants from the airpassed through the container.

Demand respirator means an atmosphere-supplyingrespirator that admits breathing air to the facepieceonly when a negative pressure is created inside thefacepiece by inhalation.

Emergency situation means any occurrence such as,but not limited to, equipment failure, rupture of con-tainers, or failure of control equipment that may ordoes result in an uncontrolled significant release ofan airborne contaminant.

Employee exposure means exposure to a concentra-tion of an airborne contaminant that would occur ifthe employee were not using respiratory protection.

End-of-service-life indicator (ESLI) means a systemthat warns the respirator user of the approach of theend of adequate respiratory protection, for example,that the sorbent is approaching saturation or is nolonger effective.

Escape-only respirator means a respirator intendedto be used only for emergency exit.

Filter or air purifying element means a componentused in respirators to remove solid or liquid aerosolsfrom the inspired air.

Filtering facepiece (dust mask) means a negativepressure particulate respirator with a filter as an inte-gral part of the facepiece or with the entire facepiececomposed of the filtering medium.

Fit factor means a quantitative estimate of the fit of aparticular respirator to a specific individual, and typi-cally estimates the ratio of the concentration of asubstance in ambient air to its concentration insidethe respirator when worn.

Fit test means the use of a protocol to qualitativelyor quantitatively evaluate the fit of a respirator on anindividual. (See also Qualitative fit test QLFT andQuantitative fit test QNFT.)

Helmet means a rigid respiratory inlet covering thatalso provides head protection against impact andpenetration.

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High efficiency particulate air (HEPA) filter means afilter that is at least 99.97% efficient in removingmonodisperse particles of 0.3 micrometers in diame-ter. The equivalent NIOSH 42 CFR 84 particulate fil-ters are the N100, R100, and P100 filters.

Hood means a respiratory inlet covering that com-pletely covers the head and neck and may also coverportions of the shoulders and torso.

Immediately dangerous to life or health (IDLH)means an atmosphere that poses an immediatethreat to life, would cause irreversible adverse healtheffects, or would impair an individual’s ability to es-cape from a dangerous atmosphere.

Interior structural firefighting means the physicalactivity of fire suppression, rescue or both, inside ofbuildings or enclosed structures which are involvedin a fire situation beyond the incipient stage. (See 29CFR 1910.155)

Loose-fitting facepiece means a respiratory inletcovering that is designed to form a partial seal withthe face.

Maximum use concentration (MUC) means the max-imum atmospheric concentration of a hazardoussubstance from which an employee can be expectedto be protected when wearing a respirator, and is de-termined by the assigned protection factor of the res-pirator or class of respirators and the exposure limitof the hazardous substance. The MUC can be deter-mined mathematically by multiplying the assignedprotection factor specified for a respirator by the re-quired OSHA permissible exposure limit, short-termexposure limit, or ceiling limit. When no OSHA expo-sure limit is available for a hazardous substance, anemployer must determine an MUC on the basis ofrelevant available information and informed profes-sional judgment.

Negative pressure respirator (tight fitting) means arespirator in which the air pressure inside the face-piece is negative during inhalation with respect tothe ambient air pressure outside the respirator.

Oxygen deficient atmosphere means an atmospherewith an oxygen content below 19.5% by volume.

Physician or other licensed healthcare professional(PLHCP) means an individual whose legally permit-ted scope of practice (i.e., license, registration, orcertification) allows him or her to independently pro-vide, or be delegated the responsibility to provide,

some or all of the healthcare services required byparagraph (e) of this section.

Positive pressure respirator means a respirator inwhich the pressure inside the respiratory inlet cover-ing exceeds the ambient air pressure outside the res-pirator.

Powered air-purifying respirator (PAPR) means anair-purifying respirator that uses a blower to forcethe ambient air through air-purifying elements to theinlet covering.

Pressure demand respirator means a positive pres-sure atmosphere-supplying respirator that admitsbreathing air to the facepiece when the positive pres-sure is reduced inside the facepiece by inhalation.

Qualitative fit test (QLFT) means a pass/fail fit test toassess the adequacy of respirator fit that relies onthe individual’s response to the test agent.

Quantitative fit test (QNFT) means an assessment ofthe adequacy of respirator fit by numerically measur-ing the amount of leakage into the respirator.

Respiratory inlet covering means that portion of arespirator that forms the protective barrier betweenthe user’s respiratory tract and an air-purifying de-vice or breathing air source, or both. It may be afacepiece, helmet, hood, suit, or a mouthpiece respi-rator with nose clamp.

Self-contained breathing apparatus (SCBA) meansan atmosphere-supplying respirator for which thebreathing air source is designed to be carried by theuser.

Service life means the period of time that a respira-tor, filter or sorbent, or other respiratory equipmentprovides adequate protection to the wearer.

Supplied-air respirator (SAR) or airline respiratormeans an atmosphere-supplying respirator forwhich the source of breathing air is not designed tobe carried by the user.

This section means this Respiratory Protection stan-dard.

Tight-fitting facepiece means a respiratory inlet cov-ering that forms a complete seal with the face.

User seal check means an action conducted by therespirator user to determine if the respirator is prop-erly seated to the face.


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1910.134(c)Respiratory protection program.This paragraph requires the employer to developand implement a written respiratory protection pro-gram with required worksite-specific procedures andelements for required respirator use. The programmust be administered by a suitably trained programadministrator. In addition, certain program elementsmay be required for voluntary use to prevent poten-tial hazards associated with the use of the respirator.

Note: The Small Entity Compliance Guidecontains criteria for the selection of a programadministrator and a sample program that meetsthe requirements of this paragraph.

1910.134(c)(1)In any workplace where respirators are necessary toprotect the health of the employee or whenever res-pirators are required by the employer, the employershall establish and implement a written respiratoryprotection program with worksite-specific proce-dures. The program shall be updated as necessary toreflect those changes in workplace conditions that af-fect respirator use. The employer shall include in theprogram the following provisions of this section, asapplicable:

1910.134(c)(1)(i)Procedures for selecting respirators for use in theworkplace;

1910.134(c)(1)(ii)Medical evaluations of employees required to userespirators;

1910.134(c)(1)(iii)Fit testing procedures for tight-fitting respirators;

1910.134(c)(1)(iv)Procedures for proper use of respirators in routineand reasonably foreseeable emergency situations;

1910.134(c)(1)(v)Procedures and schedules for cleaning, disinfecting,storing, inspecting, repairing, discarding, and other-wise maintaining respirators;

1910.134(c)(1)(vi)Procedures to ensure adequate air quality, quantity,and flow of breathing air for atmosphere-supplyingrespirators;

1910.134(c)(1)(vii)Training of employees in the respiratory hazards towhich they are potentially exposed during routineand emergency situations;

1910.134(c)(1)(viii)Training of employees in the proper use of respira-tors, including putting on and removing them, anylimitations on their use, and their maintenance; and

1910.134(c)(1)(ix)Procedures for regularly evaluating the effectivenessof the program.

1910.134(c)(2)Where respirator use is not required:

1910.134(c)(2)(i)An employer may provide respirators at the requestof employees or permit employees to use their ownrespirators, if the employer determines that such res-pirator use will not in itself create a hazard. If the em-ployer determines that any voluntary respirator useis permissible, the employer shall provide the respi-rator users with the information contained in Appen-dix D to this section (“Information for EmployeesUsing Respirators When Not Required Under theStandard”); and

1910.134(c)(2)(ii)In addition, the employer must establish and imple-ment those elements of a written respiratory protec-tion program necessary to ensure that any employeeusing a respirator voluntarily is medically able to usethat respirator, and that the respirator is cleaned,stored, and maintained so that its use does not pres-ent a health hazard to the user. Exception: Employersare not required to include in a written respiratoryprotection program those employees whose onlyuse of respirators involves the voluntary use of filter-ing facepieces (dust masks).

1910.134(c)(3)The employer shall designate a program administra-tor who is qualified by appropriate training or experi-ence that is commensurate with the complexity ofthe program to administer or oversee the respiratoryprotection program and conduct the required evalua-tions of program effectiveness.

1910.134(c)(4)The employer shall provide respirators, training, andmedical evaluations at no cost to the employee.

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1910.134(d)Selection of respirators.This paragraph requires the employer to evaluaterespiratory hazard(s) in the workplace, identify rele-vant workplace and user factors, and base respiratorselection on these factors. The paragraph also speci-fies appropriately protective respirators for use inIDLH atmospheres, and limits the selection and useof air-purifying respirators.

1910.134(d)(1General requirements.

1910.134(d)(1)(i)The employer shall select and provide an appropri-ate respirator based on the respiratory hazard(s) towhich the worker is exposed and workplace and userfactors that affect respirator performance and relia-bility.

1910.134(d)(1)(ii)The employer shall select a NIOSH-certified respira-tor. The respirator shall be used in compliance withthe conditions of its certification.

1910.134(d)(1)(iii)The employer shall identify and evaluate the respira-tory hazard(s) in the workplace; this evaluation shallinclude a reasonable estimate of employee expo-sures to respiratory hazard(s) and an identification ofthe contaminant’s chemical state and physical form.Where the employer cannot identify or reasonablyestimate the employee exposure, the employer shallconsider the atmosphere to be IDLH.

1910.134(d)(1)(iv)The employer shall select respirators from a suffi-cient number of respirator models and sizes so thatthe respirator is acceptable to, and correctly fits, theuser.

1910.134(d)(2)Respirators for IDLH atmospheres.

1910.134(d)(2)(i)The employer shall provide the following respiratorsfor employee use in IDLH atmospheres:

1910.134(d)(2)(i)(A)A full facepiece pressure demand SCBA certified byNIOSH for a minimum service life of thirty minutes,or

1910.134(d)(2)(i)(B)A combination full facepiece pressure demand sup-plied-air respirator (SAR) with auxiliary self-con-tained air supply.

1910.134(d)(2)(ii)Respirators provided only for escape from IDLH at-mospheres shall be NIOSH-certified for escape fromthe atmosphere in which they will be used.

1910.134(d)(2)(iii)All oxygen-deficient atmospheres shall be consid-ered IDLH. Exception: If the employer demonstratesthat, under all foreseeable conditions, the oxygenconcentration can be maintained within the rangesspecified in Table II of this section (i.e., for the alti-tudes set out in the table), then any atmosphere-sup-plying respirator may be used.

1910.134(d)(3)Respirators for atmospheres that are not IDLH.

1910.134(d)(3)(i)The employer shall provide a respirator that is ade-quate to protect the health of the employee and en-sure compliance with all other OSHA statutory andregulatory requirements, under routine and reason-ably foreseeable emergency situations.

1910.134(d)(3)(i)(A)Assigned Protection Factors (APFs) Employers mustuse the assigned protection factors listed in Table I toselect a respirator that meets or exceeds the requiredlevel of employee protection. When using a combi-nation respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that theassigned protection factor is appropriate to the modeof operation in which the respirator is being used.


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1910.134(d)(3)(i)(B)Maximum Use Concentration (MUC)

1910.134(d)(3)(i)(B)(1)The employer must select a respirator for employeeuse that maintains the employee’s exposure to thehazardous substance, when measured outside therespirator, at or below the MUC.

1910.134(d)(3)(i)(B)(2)Employers must not apply MUCs to conditions thatare immediately dangerous to life or health (IDLH);instead, they must use respirators listed for IDLHconditions in paragraph (d)(2) of this standard.

1910.134(d)(3)(i)(B)(3)When the calculated MUC exceeds the IDLH level fora hazardous substance, or the performance limits ofthe cartridge or canister, then employers must setthe maximum MUC at that lower limit.

1910.134(d)(3)(ii)The respirator selected shall be appropriate for thechemical state and physical form of the contaminant.

1910.134(d)(3)(iii)For protection against gases and vapors, the em-ployer shall provide:

1910.134(d)(3)(iii)(A)An atmosphere-supplying respirator, or

1910.134(d)(3)(iii)(B)An air-purifying respirator, provided that:

1910.134(d)(3)(iii)(B)(1)The respirator is equipped with an end-of-service-lifeindicator (ESLI) certified by NIOSH for the contami-nant; or

1910.134(d)(3)(iii)(B)(2)If there is no ESLI appropriate for conditions in theemployer’s workplace, the employer implements achange schedule for canisters and cartridges that isbased on objective information or data that will en-sure that canisters and cartridges are changed beforethe end of their service life. The employer shall de-scribe in the respirator program the information anddata relied upon and the basis for the canister and

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Table I: Assigned Protection Factors5

Type of Respirator1, 2 Quarter Half Full Helmet/Hood Loose-fittingmask mask facepiece facepiece

1. Air-Purifying Respirator 5 103 50 — —

2. Powered Air-Purifying Respirator (PAPR) — 50 1,000 25/1,0004 25

3. Supplied-Air Respirator (SAR)or Airline Respirator• Demand mode — 10 50 — —• Continuous flow mode — 50 1,000 25/1,0004 25• Pressure-demand or other — 50 1,000 — —

positive-pressure mode

4. Self-Contained Breathing Apparatus (SCBA)• Demand mode — 10 50 50 —• Pressure-demand or other positive- — — 10,000 10,000 —

pressure mode (e.g., open/closed circuit)

Notes:1 Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance foruse at lower concentrations of that substance, or when required respirator use is independent of concentration.

2 The assigned protection factors in Table I are only effective when the employer implements a continuing, effectiverespirator program as required by this section (29 CFR 1910.134), including training, fit testing, maintenance, and userequirements.

3 This APF category includes filtering facepieces, and half masks with elastomeric facepieces.4 The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstratesperformance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best bedemonstrated by performing a WPF or SWPF study or equivalent testing. Absent such testing, all other PAPRs andSARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.

5 These APFs do not apply to respirators used solely for escape. For escape respirators used in association with specificsubstances covered by 29 CFR 1910 subpart Z, employers must refer to the appropriate substance-specific standards inthat subpart. Escape respirators for other IDLH atmospheres are specified by 29 CFR 1910.134(d)(2)(ii).

cartridge change schedule and the basis for relianceon the data.

1910.134(d)(3)(iv)For protection against particulates, the employershall provide:

1910.134(d)(3)(iv)(A)An atmosphere-supplying respirator; or

1910.134(d)(3)(iv)(B)An air-purifying respirator equipped with a filter cer-tified by NIOSH under 30 CFR part 11 as a high effi-ciency particulate air (HEPA) filter, or an air-purifyingrespirator equipped with a filter certified for particu-lates by NIOSH under 42 CFR part 84; or

1910.134(d)(3)(iv)(C)For contaminants consisting primarily of particleswith mass median aerodynamic diameters (MMAD)of at least 2 micrometers, an air-purifying respiratorequipped with any filter certified for particulates byNIOSH.

1910.134(e)Medical evaluation.Using a respirator may place a physiological burdenon employees that varies with the type of respiratorworn, the job and workplace conditions in which therespirator is used, and the medical status of the em-ployee. Accordingly, this paragraph specifies theminimum requirements for medical evaluation thatemployers must implement to determine the em-ployee’s ability to use a respirator.

1910.134(e)(1)General. The employer shall provide a medical eval-uation to determine the employee’s ability to use a

respirator, before the employee is fit tested or re-quired to use the respirator in the workplace. Theemployer may discontinue an employee’s medicalevaluations when the employee is no longer re-quired to use a respirator.

1910.134(e)(2)Medical evaluation procedures.

1910.134(e)(2)(i)The employer shall identify a physician or other li-censed health care professional (PLHCP) to performmedical evaluations using a medical questionnaireor an initial medical examination that obtains thesame information as the medical questionnaire.

1910.134(e)(2)(ii)The medical evaluation shall obtain the informationrequested by the questionnaire in Sections 1 and 2,Part A of Appendix C of this section.

1910.134(e)(3)Follow-up medical examination.

1910.134(e)(3)(i)The employer shall ensure that a follow-up medicalexamination is provided for an employee who givesa positive response to any question among ques-tions 1 through 8 in Section 2, Part A of Appendix Cor whose initial medical examination demonstratesthe need for a follow-up medical examination.

1910.134(e)(3)(ii)The follow-up medical examination shall include anymedical tests, consultations, or diagnostic proce-dures that the PLHCP deems necessary to make afinal determination.

1910.134(e)(4)Administration of the medical questionnaire andexaminations.

1910.134(e)(4)(i)The medical questionnaire and examinations shallbe administered confidentially during the employee’snormal working hours or at a time and place conven-ient to the employee. The medical questionnaireshall be administered in a manner that ensures thatthe employee understands its content.

1910.134(e)(4)(ii)The employer shall provide the employee with anopportunity to discuss the questionnaire and exami-nation results with the PLHCP.


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Table II: Oxygen Deficient Atmospheres

Altitude (ft.) Oxygen deficient atmospheres(% O2) for which the employermay rely on atmosphere-supplying respirators

Less than 3,001 16.0-19.53,001-4,000 16.4-19.54,001-5,000 17.1-19.55,001-6,000 17.8-19.56,001-7,000 18.5-19.57,001-8,0001 19.3-19.5

1 Above 8,000 feet the exception does not apply. Oxygen-enriched breathing air must be supplied above 14,000 feet.

1910.134(e)(5)Supplemental information for the PLHCP.

1910.134(e)(5)(i)The following information must be provided to thePLHCP before the PLHCP makes a recommendationconcerning an employee’s ability to use a respirator:

1910.134(e)(5)(i)(A)(A) The type and weight of the respirator to be usedby the employee;

1910.134(e)(5)(i)(B)The duration and frequency of respirator use (includ-ing use for rescue and escape);

1910.134(e)(5)(i)(C)The expected physical work effort;

1910.134(e)(5)(i)(D)Additional protective clothing and equipment to beworn; and

1910.134(e)(5)(i)(E)Temperature and humidity extremes that may be en-countered.

1910.134(e)(5)(ii)Any supplemental information provided previouslyto the PLHCP regarding an employee need not beprovided for a subsequent medical evaluation if theinformation and the PLHCP remain the same.

1910.134(e)(5)(iii)The employer shall provide the PLHCP with a copy ofthe written respiratory protection program and acopy of this section.

Note to Paragraph (e)(5)(iii): When the employer re-places a PLHCP, the employer must ensure that thenew PLHCP obtains this information, either by pro-viding the documents directly to the PLHCP or hav-ing the documents transferred from the formerPLHCP to the new PLHCP. However, OSHA does notexpect employers to have employees medicallyreevaluated solely because a new PLHCP has beenselected.

1910.134(e)(6)Medical determination. In determining the em-ployee’s ability to use a respirator, the employershall:

1910.134(e)(6)(i)Obtain a written recommendation regarding the em-ployee’s ability to use the respirator from the PLHCP.

The recommendation shall provide only the follow-ing information:

1910.134(e)(6)(i)(A)Any limitations on respirator use related to the med-ical condition of the employee, or relating to theworkplace conditions in which the respirator will beused, including whether or not the employee is med-ically able to use the respirator;

1910.134(e)(6)(i)(B)The need, if any, for follow-up medical evaluations;and

1910.134(e)(6)(i)(C)A statement that the PLHCP has provided the em-ployee with a copy of the PLHCP’s written recom-mendation.

1910.134(e)(6)(ii)If the respirator is a negative pressure respirator andthe PLHCP finds a medical condition that may placethe employee’s health at increased risk if the respira-tor is used, the employer shall provide a PAPR if thePLHCP’s medical evaluation finds that the employeecan use such a respirator; if a subsequent medicalevaluation finds that the employee is medically ableto use a negative pressure respirator, then the em-ployer is no longer required to provide a PAPR.

1910.134(e)(7)Additional medical evaluations. At a minimum, theemployer shall provide additional medical evalua-tions that comply with the requirements of this sec-tion if:

1910.134(e)(7)(i)An employee reports medical signs or symptomsthat are related to ability to use a respirator;

1910.134(e)(7)(ii)A PLHCP, supervisor, or the respirator program ad-ministrator informs the employer that an employeeneeds to be reevaluated;

1910.134(e)(7)(iii)Information from the respiratory protection program,including observations made during fit testing andprogram evaluation, indicates a need for employeereevaluation; or

1910.134(e)(7)(iv)A change occurs in workplace conditions (e.g., physi-cal work effort, protective clothing, temperature) thatmay result in a substantial increase in the physiologi-cal burden placed on an employee.

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1910.134(f)Fit testing.This paragraph requires that, before an employeemay be required to use any respirator with a nega-tive or positive pressure tight-fitting facepiece, theemployee must be fit tested with the same make,model, style, and size of respirator that will be used.This paragraph specifies the kinds of fit tests al-lowed, the procedures for conducting them, and howthe results of the fit tests must be used.

1910.134(f)(1)The employer shall ensure that employees using atight-fitting facepiece respirator pass an appropriatequalitative fit test (QLFT) or quantitative fit test(QNFT) as stated in this paragraph.

1910.134(f)(2)The employer shall ensure that an employee using atight-fitting facepiece respirator is fit tested prior toinitial use of the respirator, whenever a different res-pirator facepiece (size, style, model or make) is used,and at least annually thereafter.

1910.134(f)(3)The employer shall conduct an additional fit testwhenever the employee reports, or the employer,PLHCP, supervisor, or program administrator makesvisual observations of, changes in the employee’sphysical condition that could affect respirator fit.Such conditions include, but are not limited to, facialscarring, dental changes, cosmetic surgery, or an ob-vious change in body weight.

1910.134(f)(4)If after passing a QLFT or QNFT, the employee sub-sequently notifies the employer, program adminis-trator, supervisor, or PLHCP that the fit of therespirator is unacceptable, the employee shall begiven a reasonable opportunity to select a differentrespirator facepiece and to be retested.

1910.134(f)(5)The fit test shall be administered using an OSHA-ac-cepted QLFT or QNFT protocol. The OSHA-acceptedQLFT and QNFT protocols and procedures are con-tained in Appendix A of this section.

1910.134(f)(6)QLFT may only be used to fit test negative pressureair-purifying respirators that must achieve a fit factorof 100 or less.

1910.134(f)(7)If the fit factor, as determined through an OSHA-ac-cepted QNFT protocol, is equal to or greater than 100for tight-fitting half facepieces, or equal to or greater

than 500 for tight-fitting full facepieces, the QNFT hasbeen passed with that respirator.

1910.134(f)(8)Fit testing of tight-fitting atmosphere-supplying res-pirators and tight-fitting powered air-purifying respi-rators shall be accomplished by performingquantitative or qualitative fit testing in the negativepressure mode, regardless of the mode of operation(negative or positive pressure) that is used for respi-ratory protection.

1910.134(f)(8)(i)Qualitative fit testing of these respirators shall beaccomplished by temporarily converting the respi-rator user’s actual facepiece into a negative pres-sure respirator with appropriate filters, or by usingan identical negative pressure air-purifying respira-tor facepiece with the same sealing surfaces as a sur-rogate for the atmosphere-supplying or poweredair-purifying respirator facepiece.

1910.134(f)(8)(ii)Quantitative fit testing of these respirators shall beaccomplished by modifying the facepiece to allowsampling inside the facepiece in the breathing zoneof the user, midway between the nose and mouth.This requirement shall be accomplished by installinga permanent sampling probe onto a surrogate face-piece, or by using a sampling adapter designed totemporarily provide a means of sampling air from in-side the facepiece.

1910.134(f)(8)(iii)Any modifications to the respirator facepiece for fittesting shall be completely removed, and the face-piece restored to NIOSH-approved configuration, be-fore that facepiece can be used in the workplace.

1910.134(g)Use of respirators.This paragraph requires employers to establish andimplement procedures for the proper use of respira-tors. These requirements include prohibiting condi-tions that may result in facepiece seal leakage,preventing employees from removing respirators inhazardous environments, taking actions to ensurecontinued effective respirator operation throughoutthe work shift, and establishing procedures for theuse of respirators in IDLH atmospheres or in interiorstructural firefighting situations.

1910.134(g)(1)Facepiece seal protection.1910.134(g)(1)(i)The employer shall not permit respirators with tight-fitting facepieces to be worn by employees who have:


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1910.134(g)(1)(i)(A)Facial hair that comes between the sealing surface ofthe facepiece and the face or that interferes withvalve function; or

1910.134(g)(1)(i)(B)Any condition that interferes with the face-to-face-piece seal or valve function.

1910.134(g)(1)(ii)If an employee wears corrective glasses or gogglesor other personal protective equipment, the em-ployer shall ensure that such equipment is worn in amanner that does not interfere with the seal of thefacepiece to the face of the user.

1910.134(g)(1)(iii)For all tight-fitting respirators, the employer shall en-sure that employees perform a user seal check eachtime they put on the respirator using the proceduresin Appendix B-1 or procedures recommended by therespirator manufacturer that the employer demon-strates are as effective as those in Appendix B-1 ofthis section.

1910.134(g)(2)Continuing respirator effectiveness.1910.134(g)(2)(i)Appropriate surveillance shall be maintained of workarea conditions and degree of employee exposure orstress. When there is a change in work area condi-tions or degree of employee exposure or stress thatmay affect respirator effectiveness, the employershall reevaluate the continued effectiveness of therespirator.

1910.134(g)(2)(ii)The employer shall ensure that employees leave therespirator use area:

1910.134(g)(2)(ii)(A)To wash their faces and respirator facepieces as nec-essary to prevent eye or skin irritation associatedwith respirator use; or

1910.134(g)(2)(ii)(B)If they detect vapor or gas breakthrough, changes inbreathing resistance, or leakage of the facepiece; or

1910.134(g)(2)(ii)(C)To replace the respirator or the filter, cartridge, orcanister elements.

1910.134(g)(2)(iii)If the employee detects vapor or gas breakthrough,changes in breathing resistance, or leakage of thefacepiece, the employer must replace or repair the

respirator before allowing the employee to return tothe work area.

1910.134(g)(3)Procedures for IDLH atmospheres. For all IDLH at-mospheres, the employer shall ensure that:

1910.134(g)(3)(i)One employee or, when needed, more than one em-ployee is located outside the IDLH atmosphere;

1910.134(g)(3)(ii)Visual, voice, or signal line communication is main-tained between the employee(s) in the IDLH atmos-phere and the employee(s) located outside the IDLHatmosphere;

1910.134(g)(3)(iii)The employee(s) located outside the IDLH atmos-phere are trained and equipped to provide effectiveemergency rescue;

1910.134(g)(3)(iv)The employer or designee is notified before the em-ployee(s) located outside the IDLH atmosphere enterthe IDLH atmosphere to provide emergency rescue;

1910.134(g)(3)(v)The employer or designee authorized to do so by theemployer, once notified, provides necessary assis-tance appropriate to the situation;

1910.134(g)(3)(vi)Employee(s) located outside the IDLH atmospheresare equipped with:

1910.134(g)(3)(vi)(A)Pressure demand or other positive pressure SCBAs,or a pressure demand or other positive pressure sup-plied-air respirator with auxiliary SCBA; and either

1910.134(g)(3)(vi)(B)Appropriate retrieval equipment for removing theemployee(s) who enter(s) these hazardous atmos-pheres where retrieval equipment would contributeto the rescue of the employee(s) and would not in-crease the overall risk resulting from entry; or

1910.134(g)(3)(vi)(C)Equivalent means for rescue where retrieval equip-ment is not required under paragraph (g)(3)(vi)(B).

1910.134(g)(4)Procedures for interior structural firefighting. In addi-tion to the requirements set forth under paragraph(g)(3), in interior structural fires, the employer shallensure that:

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1910.134(g)(4)(i)At least two employees enter the IDLH atmosphereand remain in visual or voice contact with one an-other at all times;

1910.134(g)(4)(ii)At least two employees are located outside the IDLHatmosphere; and

1910.134(g)(4)(iii)All employees engaged in interior structural firefight-ing use SCBAs.

Note 1 to paragraph (g):One of the two individualslocated outside the IDLH atmosphere may be as-signed to an additional role, such as incident com-mander in charge of the emergency or safety officer,so long as this individual is able to perform assis-tance or rescue activities without jeopardizing thesafety or health of any firefighter working at the inci-dent.

Note 2 to paragraph (g): Nothing in this section ismeant to preclude firefighters from performingemergency rescue activities before an entire teamhas assembled.

1910.134(h)Maintenance and care of respirators.This paragraph requires the employer to provide forthe cleaning and disinfecting, storage, inspection,and repair of respirators used by employees.

1910.134(h)(1)Cleaning and disinfecting. The employer shall pro-vide each respirator user with a respirator that isclean, sanitary, and in good working order. The em-ployer shall ensure that respirators are cleaned anddisinfected using the procedures in Appendix B-2 ofthis section, or procedures recommended by the res-pirator manufacturer, provided that such proceduresare of equivalent effectiveness. The respirators shallbe cleaned and disinfected at the following intervals:

1910.134(h)(1)(i)Respirators issued for the exclusive use of an em-ployee shall be cleaned and disinfected as often asnecessary to be maintained in a sanitary condition;

1910.134(h)(1)(ii)Respirators issued to more than one employee shallbe cleaned and disinfected before being worn by dif-ferent individuals;

1910.134(h)(1)(iii)Respirators maintained for emergency use shall becleaned and disinfected after each use; and

1910.134(h)(1)(iv)Respirators used in fit testing and training shall becleaned and disinfected after each use.

1910.134(h)(2)Storage. The employer shall ensure that respiratorsare stored as follows:

1910.134(h)(2)(i)All respirators shall be stored to protect them fromdamage, contamination, dust, sunlight, extreme tem-peratures, excessive moisture, and damaging chemi-cals, and they shall be packed or stored to preventdeformation of the facepiece and exhalation valve.

1910.134(h)(2)(ii)In addition to the requirements of paragraph (h)(2)(i)of this section, emergency respirators shall be:

1910.134(h)(2)(ii)(A)Kept accessible to the work area;

1910.134(h)(2)(ii)(B)Stored in compartments or in covers that are clearlymarked as containing emergency respirators; and

1910.134(h)(2)(ii)(C)Stored in accordance with any applicable manufac-turer instructions.

1910.134(h)(3)Inspection.

1910.134(h)(3)(i)The employer shall ensure that respirators are in-spected as follows:

1910.134(h)(3)(i)(A)All respirators used in routine situations shall be in-spected before each use and during cleaning;

1910.134(h)(3)(i)(B)All respirators maintained for use in emergency situ-ations shall be inspected at least monthly and in ac-cordance with the manufacturer’s recommendations,and shall be checked for proper function before andafter each use; and

1910.134(h)(3)(i)(C)Emergency escape-only respirators shall be in-spected before being carried into the workplace foruse.

1910.134(h)(3)(ii)The employer shall ensure that respirator inspec-tions include the following:


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1910.134(h)(3)(ii)(A)A check of respirator function, tightness of connec-tions, and the condition of the various parts includ-ing, but not limited to, the facepiece, head straps,valves, connecting tube, and cartridges, canisters orfilters; and

1910.134(h)(3)(ii)(B)A check of elastomeric parts for pliability and signsof deterioration.

1910.134(h)(3)(iii)In addition to the requirements of paragraphs(h)(3)(i) and (ii) of this section, self-contained breath-ing apparatus shall be inspected monthly. Air andoxygen cylinders shall be maintained in a fullycharged state and shall be recharged when the pres-sure falls to 90% of the manufacturer’s recom-mended pressure level. The employer shalldetermine that the regulator and warning devicesfunction properly.

1910.134(h)(3)(iv)For respirators maintained for emergency use, theemployer shall:

1910.134(h)(3)(iv)(A)Certify the respirator by documenting the date the in-spection was performed, the name (or signature) ofthe person who made the inspection, the findings,required remedial action, and a serial number orother means of identifying the inspected respirator;and

1910.134(h)(3)(iv)(B)Provide this information on a tag or label that is at-tached to the storage compartment for the respirator,is kept with the respirator, or is included in inspec-tion reports stored as paper or electronic files. Thisinformation shall be maintained until replaced fol-lowing a subsequent certification.

1910.134(h)(4)Repairs. The employer shall ensure that respiratorsthat fail an inspection or are otherwise found to bedefective are removed from service, and are dis-carded or repaired or adjusted in accordance withthe following procedures:

1910.134(h)(4)(i)Repairs or adjustments to respirators are to be madeonly by persons appropriately trained to performsuch operations and shall use only the respiratormanufacturer’s NIOSH-approved parts designed forthe respirator;

1910.134(h)(4)(ii)Repairs shall be made according to the manufac-turer’s recommendations and specifications for thetype and extent of repairs to be performed; and

1910.134(h)(4)(iii)Reducing and admission valves, regulators, andalarms shall be adjusted or repaired only by themanufacturer or a technician trained by the manu-facturer.

1910.134(i)Breathing air quality and use.This paragraph requires the employer to provideemployees using atmosphere-supplying respirators(supplied-air and SCBA) with breathing gases of highpurity.

1910.134(i)(1)The employer shall ensure that compressed air, com-pressed oxygen, liquid air, and liquid oxygen usedfor respiration accords with the following specifica-tions:

1910.134(i)(1)(i)Compressed and liquid oxygen shall meet the UnitedStates Pharmacopoeia requirements for medical orbreathing oxygen; and

1910.134(i)(1)(ii)Compressed breathing air shall meet at least the re-quirements for Grade D breathing air described inANSI/Compressed Gas Association CommoditySpecification for Air, G-7.1-1989, to include:

1910.134(i)(1)(ii)(A)Oxygen content (v/v) of 19.5-23.5%;

1910.134(i)(1)(ii)(B)Hydrocarbon (condensed) content of 5 milligramsper cubic meter of air or less;

1910.134(i)(1)(ii)(C)Carbon monoxide (CO) content of 10 ppm or less;

1910.134(i)(1)(ii)(D)Carbon dioxide content of 1,000 ppm or less; and

1910.134(i)(1)(ii)(E)Lack of noticeable odor.

1910.134(i)(2)The employer shall ensure that compressed oxygenis not used in atmosphere-supplying respirators thathave previously used compressed air.

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1910.134(i)(3)The employer shall ensure that oxygen concentra-tions greater than 23.5% are used only in equipmentdesigned for oxygen service or distribution.

1910.134(i)(4)The employer shall ensure that cylinders used tosupply breathing air to respirators meet the follow-ing requirements:

1910.134(i)(4)(i)Cylinders are tested and maintained as prescribed inthe Shipping Container Specification Regulations ofthe Department of Transportation (49 CFR part 173and part 178);

1910.134(i)(4)(ii)Cylinders of purchased breathing air have a certifi-cate of analysis from the supplier that the breathingair meets the requirements for Grade D breathing air;and

1910.134(i)(4)(iii)The moisture content in the cylinder does not exceeda dew point of -50 deg.F (-45.6 deg.C) at 1 atmos-phere pressure.

1910.134(i)(5)The employer shall ensure that compressors used tosupply breathing air to respirators are constructedand situated so as to:

1910.134(i)(5)(i)Prevent entry of contaminated air into the air-supplysystem;

1910.134(i)(5)(ii)Minimize moisture content so that the dew point at 1atmosphere pressure is 10 degrees F (5.56 deg.C)below the ambient temperature;

1910.134(i)(5)(iii)Have suitable in-line air-purifying sorbent beds andfilters to further ensure breathing air quality. Sorbentbeds and filters shall be maintained and replaced orrefurbished periodically following the manufacturer’sinstructions.

1910.134(i)(5)(iv)Have a tag containing the most recent change dateand the signature of the person authorized by theemployer to perform the change. The tag shall bemaintained at the compressor.

1910.134(i)(6)For compressors that are not oil-lubricated, the em-

ployer shall ensure that carbon monoxide levels inthe breathing air do not exceed 10 ppm.

1910.134(i)(7)For oil-lubricated compressors, the employer shalluse a high-temperature or carbon monoxide alarm,or both, to monitor carbon monoxide levels. If onlyhigh-temperature alarms are used, the air supplyshall be monitored at intervals sufficient to preventcarbon monoxide in the breathing air from exceed-ing 10 ppm.

1910.134(i)(8)The employer shall ensure that breathing air cou-plings are incompatible with outlets for nonres-pirable worksite air or other gas systems. Noasphyxiating substance shall be introduced intobreathing air lines.

1910.134(i)(9)The employer shall use breathing gas containersmarked in accordance with the NIOSH respirator cer-tification standard, 42 CFR part 84.

1910.134(j)Identification of filters, cartridges, andcanisters.The employer shall ensure that all filters, cartridgesand canisters used in the workplace are labeled andcolor coded with the NIOSH approval label and thatthe label is not removed and remains legible.

1910.134(k)Training and information.This paragraph requires the employer to provide ef-fective training to employees who are required touse respirators. The training must be comprehen-sive, understandable, and recur annually, and moreoften if necessary. This paragraph also requires theemployer to provide the basic information on respi-rators in Appendix D of this section to employeeswho wear respirators when not required by this sec-tion or by the employer to do so.

1910.134(k)(1)The employer shall ensure that each employee candemonstrate knowledge of at least the following:

1910.134(k)(1)(i)Why the respirator is necessary and how improperfit, usage, or maintenance can compromise the pro-tective effect of the respirator;

1910.134(k)(1)(ii)What the limitations and capabilities of the respiratorare;


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1910.134(k)(1)(iii)How to use the respirator effectively in emergencysituations, including situations in which the respira-tor malfunctions;

1910.134(k)(1)(iv)How to inspect, put on and remove, use, and checkthe seals of the respirator;

1910.134(k)(1)(v)What the procedures are for maintenance and stor-age of the respirator;

1910.134(k)(1)(vi)How to recognize medical signs and symptoms thatmay limit or prevent the effective use of respirators;and

1910.134(k)(1)(vii)The general requirements of this section.

1910.134(k)(2)The training shall be conducted in a manner that isunderstandable to the employee.

1910.134(k)(3)The employer shall provide the training prior to re-quiring the employee to use a respirator in the work-place.

1910.134(k)(4)An employer who is able to demonstrate that a newemployee has received training within the last 12months that addresses the elements specified inparagraph (k)(1)(i) through (vii) is not required torepeat such training provided that, as required byparagraph (k)(1), the employee can demonstrateknowledge of those element(s). Previous training notrepeated initially by the employer must be providedno later than 12 months from the date of the previ-ous training.

1910.134(k)(5)Retraining shall be administered annually, and whenthe following situations occur:

1910.134(k)(5)(i)Changes in the workplace or the type of respiratorrender previous training obsolete;

1910.134(k)(5)(ii)Inadequacies in the employee’s knowledge or use ofthe respirator indicate that the employee has not re-tained the requisite understanding or skill; or

1910.134(k)(5)(iii)Any other situation arises in which retraining ap-pears necessary to ensure safe respirator use.

1910.134(k)(6)The basic advisory information on respirators, aspresented in Appendix D of this section, shall be pro-vided by the employer in any written or oral format,to employees who wear respirators when such use isnot required by this section or by the employer.

1910.134(l)Program evaluation.This section requires the employer to conduct evalu-ations of the workplace to ensure that the writtenrespiratory protection program is being properly im-plemented, and to consult employees to ensure thatthey are using the respirators properly.

1910.134(l)(1)The employer shall conduct evaluations of the work-place as necessary to ensure that the provisions ofthe current written program are being effectively im-plemented and that it continues to be effective.

1910.134(l)(2)The employer shall regularly consult employees re-quired to use respirators to assess the employees’views on program effectiveness and to identify anyproblems. Any problems that are identified duringthis assessment shall be corrected. Factors to be as-sessed include, but are not limited to:

1910.134(l)(2)(i)Respirator fit (including the ability to use the respira-tor without interfering with effective workplace per-formance);

1910.134(l)(2)(ii)Appropriate respirator selection for the hazards towhich the employee is exposed;

1910.134(l)(2)(iii)Proper respirator use under the workplace conditionsthe employee encounters; and

1910.134(l)(2)(iv)Proper respirator maintenance.

1910.134(m)Recordkeeping.This section requires the employer to establish andretain written information regarding medical evalua-tions, fit testing, and the respirator program. This in-

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formation will facilitate employee involvement in therespirator program, assist the employer in auditingthe adequacy of the program, and provide a recordfor compliance determinations by OSHA.

1910.134(m)(1)Medical evaluation. Records of medical evaluationsrequired by this section must be retained and madeavailable in accordance with 29 CFR 1910.1020.

1910.134(m)(2)Fit testing.

1910.134(m)(2)(i)The employer shall establish a record of the qualita-tive and quantitative fit tests administered to an em-ployee including:

1910.134(m)(2)(i)(A)The name or identification of the employee tested;

1910.134(m)(2)(i)(B)Type of fit test performed;

1910.134(m)(2)(i)(C)Specific make, model, style, and size of respiratortested;

1910.134(m)(2)(i)(D)Date of test; and

1910.134(m)(2)(i)(E)The pass/fail results for QLFTs or the fit factor andstrip chart recording or other recording of the test re-sults for QNFTs.

1910.134(m)(2)(ii)Fit test records shall be retained for respirator usersuntil the next fit test is administered.

1910.134(m)(3)A written copy of the current respirator programshall be retained by the employer.

1910.134(m)(4)Written materials required to be retained under thisparagraph shall be made available upon request toaffected employees and to the Assistant Secretary ordesignee for examination and copying.

1910.134(n)Effective date.Paragraphs (d)(3)(i)(A) and (d)(3)(i)(B) of this sectionbecome effective November 22, 2006.

1910.134(o)Appendices.

1910.134(o)(1)Compliance with Appendix A, Appendix B-1, Appen-dix B-2, and Appendix C of this section is mandatory.

1910.134(o)(2)Appendix D of this section is non-mandatory and isnot intended to create any additional obligations nototherwise imposed or to detract from any existingobligations.

[63 FR 1152, Jan. 8, 1998; 63 FR 20098, April 23, 1998;71 FR 16672, April 3, 2006; 71 FR 50187, August 24,2006]


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Appendix A to §1910.134:Fit Testing Procedures (Mandatory)

Part I. OSHA-Accepted FitTest Protocols

A. Fit Testing Procedures -- General Requirements

The employer shall conduct fit testing using the fol-lowing procedures. The requirements in this appen-dix apply to all OSHA-accepted fit test methods, bothQLFT and QNFT.

1. The test subject shall be allowed to pick the mostacceptable respirator from a sufficient number ofrespirator models and sizes so that the respirator isacceptable to, and correctly fits, the user.

2. Prior to the selection process, the test subject shallbe shown how to put on a respirator, how it shouldbe positioned on the face, how to set strap tensionand how to determine an acceptable fit. A mirrorshall be available to assist the subject in evaluatingthe fit and positioning of the respirator. This instruc-tion may not constitute the subject’s formal trainingon respirator use, because it is only a review.

3. The test subject shall be informed that he/she isbeing asked to select the respirator that provides themost acceptable fit. Each respirator represents a dif-ferent size and shape, and if fitted and used properly,will provide adequate protection.

4. The test subject shall be instructed to hold eachchosen facepiece up to the face and eliminate thosethat obviously do not give an acceptable fit.

5. The more acceptable facepieces are noted in casethe one selected proves unacceptable; the mostcomfortable mask is donned and worn at least fiveminutes to assess comfort. Assistance in assessingcomfort can be given by discussing the points in thefollowing item A.6. If the test subject is not familiarwith using a particular respirator, the test subjectshall be directed to don the mask several times andto adjust the straps each time to become adept atsetting proper tension on the straps.

6. Assessment of comfort shall include a review ofthe following points with the test subject and allow-ing the test subject adequate time to determine thecomfort of the respirator:

(a) Position of the mask on the nose(b) Room for eye protection(c) Room to talk(d) Position of mask on face and cheeks

7. The following criteria shall be used to help deter-mine the adequacy of the respirator fit:

(a) Chin properly placed;(b) Adequate strap tension, not overly tightened;(c) Fit across nose bridge;(d) Respirator of proper size to span distance fromnose to chin;(e) Tendency of respirator to slip;(f) Self-observation in mirror to evaluate fit andrespirator position.

8. The test subject shall conduct a user seal check, ei-ther the negative and positive pressure seal checksdescribed in Appendix B-1 of this section or thoserecommended by the respirator manufacturer whichprovide equivalent protection to the procedures inAppendix B-1. Before conducting the negative andpositive pressure checks, the subject shall be told toseat the mask on the face by moving the head fromside-to-side and up and down slowly while taking ina few slow deep breaths. Another facepiece shall beselected and retested if the test subject fails the userseal check tests.

9. The test shall not be conducted if there is any hairgrowth between the skin and the facepiece sealingsurface, such as stubble beard growth, beard, mus-tache or sideburns which cross the respirator sealingsurface. Any type of apparel which interferes with asatisfactory fit shall be altered or removed.

10. If a test subject exhibits difficulty in breathingduring the tests, she or he shall be referred to aphysician or other licensed health care professional,as appropriate, to determine whether the test subjectcan wear a respirator while performing her or his du-ties.

11. If the employee finds the fit of the respirator un-acceptable, the test subject shall be given the oppor-tunity to select a different respirator and to beretested.

12. Exercise regimen. Prior to the commencement ofthe fit test, the test subject shall be given a descrip-tion of the fit test and the test subject’s responsibili-ties during the test procedure. The description of theprocess shall include a description of the test exer-cises that the subject will be performing. The respira-tor to be tested shall be worn for at least 5 minutesbefore the start of the fit test.

13. The fit test shall be performed while the test sub-ject is wearing any applicable safety equipment thatmay be worn during actual respirator use whichcould interfere with respirator fit.

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14. Test Exercises.(a) Employers must perform the following test ex-ercises for all fit testing methods prescribed in thisappendix, except for the CNP quantitative fit test-ing protocol and the CNP REDON quantitative fittesting protocol. For these two protocols, employ-ers must ensure that the test subjects (i.e., em-ployees) perform the exercise procedure specifiedin Part I.C.4(b) of this appendix for the CNP quanti-tative fit testing protocol, or the exercise proce-dure described in Part I.C.5(b) of this appendix forthe CNP REDON quantitative fit-testing protocol.For the remaining fit testing methods, employersmust ensure that employees perform the test exer-cises in the appropriate test environment in thefollowing manner:

(1) Normal breathing. In a normal standing posi-tion, without talking, the subject shall breathenormally.

(2) Deep breathing. In a normal standing posi-tion, the subject shall breathe slowly anddeeply, taking caution so as not to hyperventi-late.

(3) Turning head side to side. Standing in place,the subject shall slowly turn his/her head fromside to side between the extreme positions oneach side. The head shall be held at each ex-treme momentarily so the subject can inhale ateach side.

(4) Moving head up and down. Standing inplace, the subject shall slowly move his/herhead up and down. The subject shall be in-structed to inhale in the up position (i.e., whenlooking toward the ceiling).

(5) Talking. The subject shall talk out loud slowlyand loud enough so as to be heard clearly bythe test conductor. The subject can read from aprepared text such as the Rainbow Passage,count backward from 100, or recite a memorizedpoem or song.

Rainbow Passage

When the sunlight strikes raindrops in the air,they act like a prism and form a rainbow. Therainbow is a division of white light into manybeautiful colors. These take the shape of a longround arch, with its path high above, and its twoends apparently beyond the horizon. There is,according to legend, a boiling pot of gold at oneend. People look, but no one ever finds it. Whena man looks for something beyond reach, his

friends say he is looking for the pot of gold atthe end of the rainbow.

(6) Grimace. The test subject shall grimace bysmiling or frowning. (This applies only to QNFTtesting; it is not performed for QLFT)

(7) Bending over. The test subject shall bend atthe waist as if he/she were to touch his/her toes.Jogging in place shall be substituted for this ex-ercise in those test environments such asshroud type QNFT or QLFT units that do not per-mit bending over at the waist.

(8) Normal breathing. Same as exercise (1).

(b) Each test exercise shall be performed for oneminute except for the grimace exercise which shallbe performed for 15 seconds. The test subjectshall be questioned by the test conductor regard-ing the comfort of the respirator upon completionof the protocol. If it has become unacceptable, an-other model of respirator shall be tried. The respi-rator shall not be adjusted once the fit testexercises begin. Any adjustment voids the test,and the fit test must be repeated.

B. Qualitative FitTest (QLFT) Protocols

1. General(a) The employer shall ensure that persons admin-istering QLFT are able to prepare test solutions,calibrate equipment and perform tests properly,recognize invalid tests, and ensure that test equip-ment is in proper working order.

(b) The employer shall ensure that QLFT equip-ment is kept clean and well maintained so as tooperate within the parameters for which it was de-signed.

2. Isoamyl Acetate Protocol

Note: This protocol is not appropriate to use for thefit testing of particulate respirators. If used to fit testparticulate respirators, the respirator must beequipped with an organic vapor filter.

(a) Odor Threshold Screening

Odor threshold screening, performed withoutwearing a respirator, is intended to determine ifthe individual tested can detect the odor ofisoamyl acetate at low levels.

(1) Three 1 liter glass jars with metal lids arerequired.


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(2) Odor-free water (e.g., distilled or springwater) at approximately 25 deg. C (77 deg. F)shall be used for the solutions.

(3) The isoamyl acetate (IAA) (also known atisopentyl acetate) stock solution is prepared byadding 1 ml of pure IAA to 800 ml of odor-freewater in a 1 liter jar, closing the lid and shakingfor 30 seconds. A new solution shall be pre-pared at least weekly.

(4) The screening test shall be conducted in aroom separate from the room used for actual fittesting. The two rooms shall be well-ventilatedto prevent the odor of IAA from becoming evi-dent in the general room air where testing takesplace.

(5) The odor test solution is prepared in a sec-ond jar by placing 0.4 ml of the stock solutioninto 500 ml of odor-free water using a cleandropper or pipette. The solution shall be shakenfor 30 seconds and allowed to stand for two tothree minutes so that the IAA concentrationabove the liquid may reach equilibrium. This so-lution shall be used for only one day.

(6) A test blank shall be prepared in a third jar byadding 500 cc of odor-free water.

(7) The odor test and test blank jar lids shall belabeled (e.g., 1 and 2) for jar identification. La-bels shall be placed on the lids so that they canbe peeled off periodically and switched to main-tain the integrity of the test.

(8) The following instruction shall be typed on acard and placed on the table in front of the twotest jars (i.e., 1 and 2): “The purpose of this testis to determine if you can smell banana oil at alow concentration. The two bottles in front ofyou contain water. One of these bottles alsocontains a small amount of banana oil. Be surethe covers are on tight, then shake each bottlefor two seconds. Unscrew the lid of each bottle,one at a time, and sniff at the mouth of the bot-tle. Indicate to the test conductor which bottlecontains banana oil.”

(9) The mixtures used in the IAA odor detectiontest shall be prepared in an area separate fromwhere the test is performed, in order to preventolfactory fatigue in the subject.

(10) If the test subject is unable to correctly iden-tify the jar containing the odor test solution, theIAA qualitative fit test shall not be performed.

(11) If the test subject correctly identifies the jarcontaining the odor test solution, the test sub-ject may proceed to respirator selection and fittesting.

(b) Isoamyl Acetate Fit Test

(1) The fit test chamber shall be a clear 55-gallondrum liner suspended inverted over a 2-foot di-ameter frame so that the top of the chamber isabout 6 inches above the test subject’s head. Ifno drum liner is available, a similar chambershall be constructed using plastic sheeting. Theinside top center of the chamber shall have asmall hook attached.

(2) Each respirator used for the fitting and fittesting shall be equipped with organic vaporcartridges or offer protection against organic va-pors.

(3) After selecting, donning, and properly adjust-ing a respirator, the test subject shall wear it tothe fit testing room. This room shall be separatefrom the room used for odor threshold screen-ing and respirator selection, and shall be well-ventilated, as by an exhaust fan or lab hood, toprevent general room contamination.

(4) A copy of the test exercises and any pre-pared text from which the subject is to readshall be taped to the inside of the test chamber.

(5) Upon entering the test chamber, the test sub-ject shall be given a 6-inch by 5-inch piece ofpaper towel, or other porous, absorbent, single-ply material, folded in half and wetted with 0.75ml of pure IAA. The test subject shall hang thewet towel on the hook at the top of the chamber.An IAA test swab or ampule may be substitutedfor the IAA wetted paper towel provided it hasbeen demonstrated that the alternative IAAsource will generate an IAA test atmospherewith a concentration equivalent to that gener-ated by the paper towel method.

(6) Allow two minutes for the IAA test concen-tration to stabilize before starting the fit test ex-ercises. This would be an appropriate time totalk with the test subject; to explain the fit test,the importance of his/her cooperation, and thepurpose for the test exercises; or to demon-strate some of the exercises.

(7) If at any time during the test, the subject de-tects the banana-like odor of IAA, the test isfailed. The subject shall quickly exit from the

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test chamber and leave the test area to avoid ol-factory fatigue.

(8) If the test is failed, the subject shall return tothe selection room and remove the respirator.The test subject shall repeat the odor sensitivitytest, select and put on another respirator, returnto the test area and again begin the fit test pro-cedure described in (b) (1) through (7) above.The process continues until a respirator that fitswell has been found. Should the odor sensitivitytest be failed, the subject shall wait at least 5minutes before retesting. Odor sensitivity willusually have returned by this time.

(9) If the subject passes the test, the efficiency ofthe test procedure shall be demonstrated byhaving the subject break the respirator face sealand take a breath before exiting the chamber.

(10) When the test subject leaves the chamber,the subject shall remove the saturated toweland return it to the person conducting the test,so that there is no significant IAA concentrationbuildup in the chamber during subsequenttests. The used towels shall be kept in a self-sealing plastic bag to keep the test area frombeing contaminated.

3. Saccharin Solution Aerosol Protocol

The entire screening and testing procedure shall beexplained to the test subject prior to the conduct ofthe screening test.

(a) Taste threshold screening. The saccharin tastethreshold screening, performed without wearing arespirator, is intended to determine whether theindividual being tested can detect the taste of sac-charin.

(1) During threshold screening as well as duringfit testing, subjects shall wear an enclosureabout the head and shoulders that is approxi-mately 12 inches in diameter by 14 inches tallwith at least the front portion clear and that al-lows free movements of the head when a respi-rator is worn. An enclosure substantially similarto the 3M hood assembly, parts # FT 14 and # FT15 combined, is adequate.

(2) The test enclosure shall have a 3/4-inch (1.9cm) hole in front of the test subject’s nose andmouth area to accommodate the nebulizer noz-zle.

(3) The test subject shall don the test enclosure.

Throughout the threshold screening test, thetest subject shall breathe through his/herslightly open mouth with tongue extended. Thesubject is instructed to report when he/she de-tects a sweet taste.

(4) Using a DeVilbiss Model 40 Inhalation Med-ication Nebulizer or equivalent, the test conduc-tor shall spray the threshold check solution intothe enclosure. The nozzle is directed away fromthe nose and mouth of the person. This nebu-lizer shall be clearly marked to distinguish itfrom the fit test solution nebulizer.

(5) The threshold check solution is prepared bydissolving 0.83 gram of sodium saccharin USPin 100 ml of warm water. It can be prepared byputting 1 ml of the fit test solution (see (b)(5)below) in 100 ml of distilled water.

(6) To produce the aerosol, the nebulizer bulb isfirmly squeezed so that it collapses completely,then released and allowed to fully expand.

(7) Ten squeezes are repeated rapidly and thenthe test subject is asked whether the saccharincan be tasted. If the test subject reports tastingthe sweet taste during the ten squeezes, thescreening test is completed. The taste thresholdis noted as ten regardless of the number ofsqueezes actually completed.

(8) If the first response is negative, ten moresqueezes are repeated rapidly and the test sub-ject is again asked whether the saccharin istasted. If the test subject reports tasting thesweet taste during the second ten squeezes, thescreening test is completed. The taste thresholdis noted as twenty regardless of the number ofsqueezes actually completed.

(9) If the second response is negative, ten moresqueezes are repeated rapidly and the test sub-ject is again asked whether the saccharin istasted. If the test subject reports tasting thesweet taste during the third set of ten squeezes,the screening test is completed. The tastethreshold is noted as thirty regardless of thenumber of squeezes actually completed.

(10) The test conductor will take note of thenumber of squeezes required to solicit a tasteresponse.

(11) If the saccharin is not tasted after 30squeezes (step 10), the test subject is unable totaste saccharin and may not perform the sac-


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charin fit test.

Note to paragraph 3. (a): If the test subject eatsor drinks something sweet before the screeningtest, he/she may be unable to taste the weaksaccharin solution.

(12) If a taste response is elicited, the test sub-ject shall be asked to take note of the taste forreference in the fit test.

(13) Correct use of the nebulizer means that ap-proximately 1 ml of liquid is used at a time inthe nebulizer body.

(14) The nebulizer shall be thoroughly rinsed inwater, shaken dry, and refilled at least eachmorning and afternoon or at least every fourhours.

(b) Saccharin solution aerosol fit test procedure.

(1) The test subject may not eat, drink (exceptplain water), smoke, or chew gum for 15 min-utes before the test.

(2) The fit test uses the same enclosure de-scribed in 3. (a) above.

(3) The test subject shall don the enclosurewhile wearing the respirator selected in sectionI. A. of this appendix. The respirator shall beproperly adjusted and equipped with a particu-late filter(s).

(4) A second DeVilbiss Model 40 InhalationMedication Nebulizer or equivalent is used tospray the fit test solution into the enclosure.This nebulizer shall be clearly marked to distin-guish it from the screening test solution nebu-lizer.

(5) The fit test solution is prepared by adding 83grams of sodium saccharin to 100 ml of warmwater.

(6) As before, the test subject shall breathethrough the slightly open mouth with tongueextended, and report if he/she tastes the sweettaste of saccharin.

(7) The nebulizer is inserted into the hole in thefront of the enclosure and an initial concentra-tion of saccharin fit test solution is sprayed intothe enclosure using the same number ofsqueezes (either 10, 20 or 30 squeezes) based onthe number of squeezes required to elicit a taste

response as noted during the screening test. Aminimum of 10 squeezes is required.

(8) After generating the aerosol, the test subjectshall be instructed to perform the exercises insection I. A. 14. of this appendix.

(9) Every 30 seconds the aerosol concentrationshall be replenished using one half the originalnumber of squeezes used initially (e.g., 5, 10 or15).

(10) The test subject shall indicate to the testconductor if at any time during the fit test thetaste of saccharin is detected. If the test subjectdoes not report tasting the saccharin, the test ispassed.

(11) If the taste of saccharin is detected, the fit isdeemed unsatisfactory and the test is failed. Adifferent respirator shall be tried and the entiretest procedure is repeated (taste thresholdscreening and fit testing).

(12) Since the nebulizer has a tendency to clogduring use, the test operator must make peri-odic checks of the nebulizer to ensure that it isnot clogged. If clogging is found at the end ofthe test session, the test is invalid.

4. BitrexTM (Denatonium Benzoate) Solution AerosolQualitative Fit Test Protocol

The BitrexTM (Denatonium benzoate) solutionaerosol QLFT protocol uses the published saccharintest protocol because that protocol is widely ac-cepted. Bitrex is routinely used as a taste aversionagent in household liquids which children should notbe drinking and is endorsed by the American Med-ical Association, the National Safety Council, and theAmerican Association of Poison Control Centers. Theentire screening and testing procedure shall be ex-plained to the test subject prior to the conduct of thescreening test.

(a) Taste Threshold Screening.

The Bitrex taste threshold screening, performedwithout wearing a respirator, is intended to deter-mine whether the individual being tested can de-tect the taste of Bitrex.

(1) During threshold screening as well as duringfit testing, subjects shall wear an enclosureabout the head and shoulders that is approxi-mately 12 inches (30.5 cm) in diameter by 14inches (35.6 cm) tall. The front portion of the en-

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closure shall be clear from the respirator andallow free movement of the head when a respi-rator is worn. An enclosure substantially similarto the 3M hood assembly, parts # FT 14 and # FT15 combined, is adequate.

(2) The test enclosure shall have a 3/4 inch (1.9cm) hole in front of the test subject’s nose andmouth area to accommodate the nebulizer noz-zle.

(3) The test subject shall don the test enclosure.Throughout the threshold screening test, thetest subject shall breathe through his or herslightly open mouth with tongue extended. Thesubject is instructed to report when he/she de-tects a bitter taste

(4) Using a DeVilbiss Model 40 Inhalation Med-ication Nebulizer or equivalent, the test conduc-tor shall spray the Threshold Check Solutioninto the enclosure. This Nebulizer shall beclearly marked to distinguish it from the fit testsolution nebulizer.

(5) The Threshold Check Solution is prepared byadding 13.5 milligrams of Bitrex to 100 ml of 5%salt (NaCl) solution in distilled water.

(6) To produce the aerosol, the nebulizer bulb isfirmly squeezed so that the bulb collapses com-pletely, and is then released and allowed to fullyexpand.

(7) An initial ten squeezes are repeated rapidlyand then the test subject is asked whether theBitrex can be tasted. If the test subject reportstasting the bitter taste during the ten squeezes,the screening test is completed. The tastethreshold is noted as ten regardless of the num-ber of squeezes actually completed.

(8) If the first response is negative, ten moresqueezes are repeated rapidly and the test sub-ject is again asked whether the Bitrex is tasted. Ifthe test subject reports tasting the bitter tasteduring the second ten squeezes, the screeningtest is completed. The taste threshold is notedas twenty regardless of the number of squeezesactually completed.

(9) If the second response is negative, ten moresqueezes are repeated rapidly and the test sub-ject is again asked whether the Bitrex is tasted. Ifthe test subject reports tasting the bitter tasteduring the third set of ten squeezes, the screen-ing test is completed. The taste threshold is

noted as thirty regardless of the number ofsqueezes actually completed.

(10) The test conductor will take note of thenumber of squeezes required to solicit a tasteresponse.

(11) If the Bitrex is not tasted after 30 squeezes(step 10), the test subject is unable to taste Bi-trex and may not perform the Bitrex fit test.

(12) If a taste response is elicited, the test sub-ject shall be asked to take note of the taste forreference in the fit test.

(13) Correct use of the nebulizer means that ap-proximately 1 ml of liquid is used at a time inthe nebulizer body.

(14) The nebulizer shall be thoroughly rinsed inwater, shaken to dry, and refilled at least eachmorning and afternoon or at least every fourhours.

(b) Bitrex Solution Aerosol Fit Test Procedure.

(1) The test subject may not eat, drink (exceptplain water), smoke, or chew gum for 15 min-utes before the test.

(2) The fit test uses the same enclosure as thatdescribed in 4. (a) above.

(3) The test subject shall don the enclosurewhile wearing the respirator selected accordingto section I. A. of this appendix. The respiratorshall be properly adjusted and equipped withany type particulate filter(s).

(4) A second DeVilbiss Model 40 InhalationMedication Nebulizer or equivalent is used tospray the fit test solution into the enclosure.This nebulizer shall be clearly marked to distin-guish it from the screening test solution nebu-lizer.

(5) The fit test solution is prepared by adding337.5 mg of Bitrex to 200 ml of a 5% salt (NaCl)solution in warm water.

(6) As before, the test subject shall breathethrough his or her slightly open mouth withtongue extended, and be instructed to report ifhe/she tastes the bitter taste of Bitrex.

(7) The nebulizer is inserted into the hole in thefront of the enclosure and an initial concentra-


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tion of the fit test solution is sprayed into the en-closure using the same number of squeezes (ei-ther 10, 20 or 30 squeezes) based on thenumber of squeezes required to elicit a taste re-sponse as noted during the screening test.

(8) After generating the aerosol, the test subjectshall be instructed to perform the exercises insection I. A. 14. of this appendix.

(9) Every 30 seconds the aerosol concentrationshall be replenished using one half the numberof squeezes used initially (e.g., 5, 10 or 15).

(10) The test subject shall indicate to the testconductor if at any time during the fit test thetaste of Bitrex is detected. If the test subjectdoes not report tasting the Bitrex, the test ispassed.

(11) If the taste of Bitrex is detected, the fit isdeemed unsatisfactory and the test is failed. Adifferent respirator shall be tried and the entiretest procedure is repeated (taste thresholdscreening and fit testing).

5. Irritant Smoke (Stannic Chloride) Protocol

This qualitative fit test uses a person’s response tothe irritating chemicals released in the “smoke” pro-duced by a stannic chloride ventilation smoke tubeto detect leakage into the respirator.

(a) General Requirements and Precautions

(1) The respirator to be tested shall be equippedwith high efficiency particulate air (HEPA) orP100 series filter(s).

(2) Only stannic chloride smoke tubes shall beused for this protocol.

(3) No form of test enclosure or hood for the testsubject shall be used.

(4) The smoke can be irritating to the eyes,lungs, and nasal passages. The test conductorshall take precautions to minimize the test sub-ject’s exposure to irritant smoke. Sensitivityvaries, and certain individuals may respond to agreater degree to irritant smoke. Care shall betaken when performing the sensitivity screeningchecks that determine whether the test subjectcan detect irritant smoke to use only the mini-mum amount of smoke necessary to elicit a re-sponse from the test subject.

(5) The fit test shall be performed in an area withadequate ventilation to prevent exposure of theperson conducting the fit test or the build-up ofirritant smoke in the general atmosphere.(b) Sensitivity Screening Check

The person to be tested must demonstrate hisor her ability to detect a weak concentration ofthe irritant smoke.(1) The test operator shall break both ends of aventilation smoke tube containing stannic chlo-ride, and attach one end of the smoke tube to alow flow air pump set to deliver 200 millilitersper minute, or an aspirator squeeze bulb. Thetest operator shall cover the other end of thesmoke tube with a short piece of tubing to pre-vent potential injury from the jagged end of thesmoke tube.

(2) The test operator shall advise the test subjectthat the smoke can be irritating to the eyes,lungs, and nasal passages and instruct the sub-ject to keep his/her eyes closed while the test isperformed.

(3) The test subject shall be allowed to smell aweak concentration of the irritant smoke beforethe respirator is donned to become familiar withits irritating properties and to determine ifhe/she can detect the irritating properties of thesmoke. The test operator shall carefully direct asmall amount of the irritant smoke in the testsubject’s direction to determine that he/she candetect it.

(c) Irritant Smoke Fit Test Procedure

(1) The person being fit tested shall don the res-pirator without assistance, and perform the re-quired user seal check(s).

(2) The test subject shall be instructed to keephis/her eyes closed.

(3) The test operator shall direct the stream of ir-ritant smoke from the smoke tube toward thefaceseal area of the test subject, using the lowflow pump or the squeeze bulb. The test opera-tor shall begin at least 12 inches from the face-piece and move the smoke stream around thewhole perimeter of the mask. The operator shallgradually make two more passes around theperimeter of the mask, moving to within sixinches of the respirator.

(4) If the person being tested has not had an in-voluntary response and/or detected the irritant

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smoke, proceed with the test exercises.

(5) The exercises identified in section I.A. 14. ofthis appendix shall be performed by the testsubject while the respirator seal is being contin-ually challenged by the smoke, directed aroundthe perimeter of the respirator at a distance ofsix inches.

(6) If the person being fit tested reports detect-ing the irritant smoke at any time, the test isfailed. The person being retested must repeatthe entire sensitivity check and fit test proce-dure.

(7) Each test subject passing the irritant smoketest without evidence of a response (involuntarycough, irritation) shall be given a second sensi-tivity screening check, with the smoke from thesame smoke tube used during the fit test, oncethe respirator has been removed, to determinewhether he/she still reacts to the smoke. Failureto evoke a response shall void the fit test.

(8) If a response is produced during this secondsensitivity check, then the fit test is passed.

C. Quantitative FitTest (QNFT) Protocols

The following quantitative fit testing procedureshave been demonstrated to be acceptable: Quantita-tive fit testing using a non-hazardous test aerosol(such as corn oil, polyethylene glycol 400 [PEG 400],di-2-ethyl hexyl sebacate [DEHS], or sodium chlo-ride) generated in a test chamber, and employing in-strumentation to quantify the fit of the respirator;Quantitative fit testing using ambient aerosol as thetest agent and appropriate instrumentation (conden-sation nuclei counter) to quantify the respirator fit;Quantitative fit testing using controlled negativepressure and appropriate instrumentation to meas-ure the volumetric leak rate of a facepiece to quantifythe respirator fit.

1. General

(a) The employer shall ensure that persons admin-istering QNFT are able to calibrate equipment andperform tests properly, recognize invalid tests, cal-culate fit factors properly and ensure that testequipment is in proper working order.

(b) The employer shall ensure that QNFT equip-ment is kept clean, and is maintained and cali-brated according to the manufacturer’sinstructions so as to operate at the parameters forwhich it was designed.

2. Generated Aerosol Quantitative Fit Testing Protocol

(a) Apparatus.

(1) Instrumentation. Aerosol generation, dilu-tion, and measurement systems using particu-lates (corn oil, polyethylene glycol 400 [PEG400], di-2-ethyl hexyl sebacate [DEHS] orsodium chloride) as test aerosols shall be usedfor quantitative fit testing.

(2) Test chamber. The test chamber shall belarge enough to permit all test subjects to per-form freely all required exercises without dis-turbing the test agent concentration or themeasurement apparatus. The test chamber shallbe equipped and constructed so that the testagent is effectively isolated from the ambientair, yet uniform in concentration throughout thechamber.

(3) When testing air-purifying respirators, thenormal filter or cartridge element shall be re-placed with a high efficiency particulate air(HEPA) or P100 series filter supplied by thesame manufacturer.

(4) The sampling instrument shall be selected sothat a computer record or strip chart record maybe made of the test showing the rise and fall ofthe test agent concentration with each inspira-tion and expiration at fit factors of at least 2,000.Integrators or computers that integrate theamount of test agent penetration leakage intothe respirator for each exercise may be usedprovided a record of the readings is made.

(5) The combination of substitute air-purifyingelements, test agent and test agent concentra-tion shall be such that the test subject is not ex-posed in excess of an established exposure limitfor the test agent at any time during the testingprocess, based upon the length of the exposureand the exposure limit duration.

(6) The sampling port on the test specimen res-pirator shall be placed and constructed so thatno leakage occurs around the port (e.g., wherethe respirator is probed), a free air flow is al-lowed into the sampling line at all times, andthere is no interference with the fit or perform-ance of the respirator. The in-mask sampling de-vice (probe) shall be designed and used so thatthe air sample is drawn from the breathing zoneof the test subject, midway between the noseand mouth and with the probe extending intothe facepiece cavity at least 1/4 inch.


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(7) The test setup shall permit the person ad-ministering the test to observe the test subjectinside the chamber during the test.

(8) The equipment generating the test atmos-phere shall maintain the concentration of testagent constant to within a 10 percent variationfor the duration of the test.

(9) The time lag (interval between an event andthe recording of the event on the strip chart orcomputer or integrator) shall be kept to a mini-mum. There shall be a clear association be-tween the occurrence of an event and its beingrecorded.

(10) The sampling line tubing for the test cham-ber atmosphere and for the respirator samplingport shall be of equal diameter and of the samematerial. The length of the two lines shall beequal.

(11) The exhaust flow from the test chambershall pass through an appropriate filter (i.e.,high efficiency particulate filter) before release.

(12) When sodium chloride aerosol is used, therelative humidity inside the test chamber shallnot exceed 50 percent.

(13) The limitations of instrument detection shallbe taken into account when determining the fitfactor.

(14) Test respirators shall be maintained inproper working order and be inspected regu-larly for deficiencies such as cracks or missingvalves and gaskets.

(b) Procedural Requirements.

(1) When performing the initial user seal checkusing a positive or negative pressure check, thesampling line shall be crimped closed in orderto avoid air pressure leakage during either ofthese pressure checks.

(2) The use of an abbreviated screening QLFTtest is optional. Such a test may be utilized inorder to quickly identify poor fitting respiratorsthat passed the positive and/or negative pres-sure test and reduce the amount of QNFT time.The use of the CNC QNFT instrument in thecount mode is another optional method to ob-tain a quick estimate of fit and eliminate poor fit-ting respirators before going on to perform afull QNFT.

(3) A reasonably stable test agent concentrationshall be measured in the test chamber prior totesting. For canopy or shower curtain types oftest units, the determination of the test agent’sstability may be established after the test sub-ject has entered the test environment.

(4) Immediately after the subject enters the testchamber, the test agent concentration inside therespirator shall be measured to ensure that thepeak penetration does not exceed 5 percent fora half mask or 1 percent for a full facepiece res-pirator.

(5) A stable test agent concentration shall be ob-tained prior to the actual start of testing.

(6) Respirator restraining straps shall not beover-tightened for testing. The straps shall beadjusted by the wearer without assistance fromother persons to give a reasonably comfortablefit typical of normal use. The respirator shall notbe adjusted once the fit test exercises begin.

(7) The test shall be terminated whenever anysingle peak penetration exceeds 5 percent forhalf masks and 1 percent for full facepiece respi-rators. The test subject shall be refitted andretested.

(8) Calculation of fit factors.

(i) The fit factor shall be determined for thequantitative fit test by taking the ratio of theaverage chamber concentration to the con-centration measured inside the respirator foreach test exercise except the grimace exer-cise.

(ii) The average test chamber concentrationshall be calculated as the arithmetic averageof the concentration measured before andafter each test (i.e., 7 exercises) or the arith-metic average of the concentration measuredbefore and after each exercise or the true av-erage measured continuously during the res-pirator sample.

(iii) The concentration of the challenge agentinside the respirator shall be determined byone of the following methods:

(A) Average peak penetration method meansthe method of determining test agent pene-tration into the respirator utilizing a strip chartrecorder, integrator, or computer. The agent

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penetration is determined by an average ofthe peak heights on the graph or by computerintegration, for each exercise except the gri-mace exercise. Integrators or computers thatcalculate the actual test agent penetration intothe respirator for each exercise will also beconsidered to meet the requirements of theaverage peak penetration method.

(B) Maximum peak penetration methodmeans the method of determining test agentpenetration in the respirator as determined bystrip chart recordings of the test. The highestpeak penetration for a given exercise is takento be representative of average penetrationinto the respirator for that exercise.

(C) Integration by calculation of the areaunder the individual peak for each exerciseexcept the grimace exercise. This includescomputerized integration.

(D) The calculation of the overall fit factorusing individual exercise fit factors involvesfirst converting the exercise fit factors to pen-etration values, determining the average, andthen converting that result back to a fit factor.This procedure is described in the followingequation:

Where ff1, ff2, ff3, etc. are the fit factors forexercises 1, 2, 3, etc.

(9) The test subject shall not be permitted towear a half mask or quarter facepiece respiratorunless a minimum fit factor of 100 is obtained,or a full facepiece respirator unless a minimumfit factor of 500 is obtained.

(10) Filters used for quantitative fit testing shallbe replaced whenever increased breathing re-sistance is encountered, or when the test agenthas altered the integrity of the filter media.

3. Ambient aerosol condensation nuclei counter(CNC) quantitative fit testing protocol.

The ambient aerosol condensation nuclei counter(CNC) quantitative fit testing (Portacount TM ) protocolquantitatively fit tests respirators with the use of aprobe. The probed respirator is only used for quanti-tative fit tests. A probed respirator has a special sam-pling device, installed on the respirator, that allowsthe probe to sample the air from inside the mask. A

probed respirator is required for each make, style,model, and size that the employer uses and can beobtained from the respirator manufacturer or distrib-utor. The CNC instrument manufacturer, TSI Inc., alsoprovides probe attachments (TSI sampling adapters)that permit fit testing in an employee’s own respira-tor. A minimum fit factor pass level of at least 100 isnecessary for a half-mask respirator and a minimumfit factor pass level of at least 500 is required for a fullfacepiece negative pressure respirator. The entirescreening and testing procedure shall be explainedto the test subject prior to the conduct of the screen-ing test.

(a) Portacount Fit Test Requirements.

(1) Check the respirator to make sure the sam-pling probe and line are properly attached to thefacepiece and that the respirator is fitted with aparticulate filter capable of preventing signifi-cant penetration by the ambient particles usedfor the fit test (e.g., NIOSH 42 CFR 84 series 100,series 99, or series 95 particulate filter) per man-ufacturer’s instruction.

(2) Instruct the person to be tested to don therespirator for five minutes before the fit teststarts. This purges the ambient particles trappedinside the respirator and permits the wearer tomake certain the respirator is comfortable. Thisindividual shall already have been trained onhow to wear the respirator properly.

(3) Check the following conditions for the ade-quacy of the respirator fit: Chin properly placed;Adequate strap tension, not overly tightened; Fitacross nose bridge; Respirator of proper size tospan distance from nose to chin; Tendency ofthe respirator to slip; Self-observation in a mir-ror to evaluate fit and respirator position.

(4) Have the person wearing the respirator do auser seal check. If leakage is detected, deter-mine the cause. If leakage is from a poorly fit-ting facepiece, try another size of the samemodel respirator, or another model of respirator.

(5) Follow the manufacturer’s instructions foroperating the Portacount and proceed with thetest.

(6) The test subject shall be instructed to per-form the exercises in section I. A. 14. of this ap-pendix.

(7) After the test exercises, the test subject shallbe questioned by the test conductor regarding


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the comfort of the respirator upon completion ofthe protocol. If it has become unacceptable, an-other model of respirator shall be tried.

(b) Portacount Test Instrument.

(1) The Portacount will automatically stop andcalculate the overall fit factor for the entire set ofexercises. The overall fit factor is what counts.The Pass or Fail message will indicate whetheror not the test was successful. If the test was aPass, the fit test is over.

(2) Since the pass or fail criterion of the Porta-count is user programmable, the test operatorshall ensure that the pass or fail criterion meetthe requirements for minimum respirator per-formance in this Appendix.

(3) A record of the test needs to be kept on file,assuming the fit test was successful. The recordmust contain the test subject’s name; overall fitfactor; make, model, style, and size of respiratorused; and date tested.

4. Controlled negative pressure (CNP) quantitative fittesting protocol.

The CNP protocol provides an alternative to aerosolfit test methods. The CNP fit test method technologyis based on exhausting air from a temporarily sealedrespirator facepiece to generate and then maintain aconstant negative pressure inside the facepiece. Therate of air exhaust is controlled so that a constantnegative pressure is maintained in the respirator dur-ing the fit test. The level of pressure is selected toreplicate the mean inspiratory pressure that causesleakage into the respirator under normal use condi-tions. With pressure held constant, air flow out of therespirator is equal to air flow into the respirator.Therefore, measurement of the exhaust stream thatis required to hold the pressure in the temporarilysealed respirator constant yields a direct measure ofleakage air flow into the respirator. The CNP fit testmethod measures leak rates through the facepieceas a method for determining the facepiece fit fornegative pressure respirators. The CNP instrumentmanufacturer Occupational Health Dynamics ofBirmingham, Alabama also provides attachments(sampling manifolds) that replace the filter cartridgesto permit fit testing in an employee’s own respirator.To perform the test, the test subject closes his or hermouth and holds his/her breath, after which an airpump removes air from the respirator facepiece at apre-selected constant pressure. The facepiece fit isexpressed as the leak rate through the facepiece, ex-

pressed as milliliters per minute. The quality and va-lidity of the CNP fit tests are determined by the de-gree to which the in-mask pressure tracks the testpressure during the system measurement time ofapproximately five seconds. Instantaneous feedbackin the form of a real-time pressure trace of the in-mask pressure is provided and used to determinetest validity and quality. A minimum fit factor passlevel of 100 is necessary for a half-mask respiratorand a minimum fit factor of at least 500 is requiredfor a full facepiece respirator. The entire screeningand testing procedure shall be explained to the testsubject prior to the conduct of the screening test.

(a) CNP Fit Test Requirements.

(1) The instrument shall have a non-adjustabletest pressure of 15.0 mm water pressure.

(2) The CNP system defaults selected for testpressure shall be set at -- 15 mm of water (-0.58inches of water) and the modeled inspiratoryflow rate shall be 53.8 liters per minute for per-forming fit tests.

(Note: CNP systems have built-in capability toconduct fit testing that is specific to unique workrate, mask, and gender situations that mightapply in a specific workplace. Use of system de-fault values, which were selected to representrespirator wear with medium cartridge resist-ance at a low-moderate work rate, will allowinter-test comparison of the respirator fit.)

(3) The individual who conducts the CNP fit test-ing shall be thoroughly trained to perform thetest.

(4) The respirator filter or cartridge needs to bereplaced with the CNP test manifold. The inhala-tion valve downstream from the manifold eitherneeds to be temporarily removed or proppedopen.

(5) The employer must train the test subject tohold his or her breath for at least 10 seconds.

(6) The test subject must don the test respiratorwithout any assistance from the test administra-tor who is conducting the CNP fit test. The respi-rator must not be adjusted once the fit-testexercises begin. Any adjustment voids the test,and the test subject must repeat the fit test.

(7) The QNFT protocol shall be followed accord-ing to section I. C. 1. of this appendix with an ex-ception for the CNP test exercises.

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(b) CNP Test Exercises.

(1) Normal breathing. In a normal standing posi-tion, without talking, the subject shall breathenormally for 1 minute. After the normal breath-ing exercise, the subject needs to hold headstraight ahead and hold his or her breath for 10seconds during the test measurement.

(2) Deep breathing. In a normal standing posi-tion, the subject shall breathe slowly and deeplyfor 1 minute, being careful not to hyperventilate.After the deep breathing exercise, the subjectshall hold his or her head straight ahead andhold his or her breath for 10 seconds during testmeasurement.

(3) Turning head side to side. Standing in place,the subject shall slowly turn his or her headfrom side to side between the extreme positionson each side for 1 minute. The head shall beheld at each extreme momentarily so the sub-ject can inhale at each side. After the turninghead side to side exercise, the subject needs tohold head full left and hold his or her breath for10 seconds during test measurement. Next, thesubject needs to hold head full right and holdhis or her breath for 10 seconds during testmeasurement.

(4) Moving head up and down. Standing inplace, the subject shall slowly move his or herhead up and down for 1 minute. The subjectshall be instructed to inhale in the up position(i.e., when looking toward the ceiling). After themoving head up and down exercise, the subjectshall hold his or her head full up and hold his orher breath for 10 seconds during test measure-ment. Next, the subject shall hold his or herhead full down and hold his or her breath for 10seconds during test measurement.

(5) Talking. The subject shall talk out loud slowlyand loud enough so as to be heard clearly bythe test conductor. The subject can read from aprepared text such as the Rainbow Passage,count backward from 100, or recite a memorizedpoem or song for 1 minute. After the talking ex-ercise, the subject shall hold his or her headstraight ahead and hold his or her breath for 10seconds during the test measurement.

(6) Grimace. The test subject shall grimace bysmiling or frowning for 15 seconds.

(7) Bending Over. The test subject shall bend atthe waist as if he or she were to touch his or hertoes for 1 minute. Jogging in place shall be sub-

stituted for this exercise in those test environ-ments such as shroud-type QNFT units that pro-hibit bending at the waist. After the bendingover exercise, the subject shall hold his or herhead straight ahead and hold his or her breathfor 10 seconds during the test measurement.

(8) Normal Breathing. The test subject shall re-move and re-don the respirator within a one-minute period. Then, in a normal standingposition, without talking, the subject shallbreathe normally for 1 minute. After the normalbreathing exercise, the subject shall hold his orher head straight ahead and hold his or herbreath for 10 seconds during the test measure-ment. After the test exercises, the test subjectshall be questioned by the test conductor re-garding the comfort of the respirator upon com-pletion of the protocol. If it has becomeunacceptable, another model of a respiratorshall be tried.

(c) CNP Test Instrument.

(1) The test instrument must have an effectiveaudio-warning device, or a visual-warning de-vice in the form of a screen tracing, that indi-cates when the test subject fails to hold his orher breath during the test. The test must be ter-minated and restarted from the beginning whenthe test subject fails to hold his or her breathduring the test. The test subject then may be re-fitted and retested.

(2) A record of the test shall be kept on file, as-suming the fit test was successful. The recordmust contain the test subject’s name; overall fitfactor; make, model, style and size of respiratorused; and date tested.

5. Controlled negative pressure (CNP) REDON quan-titative fit testing protocol.

(a) When administering this protocol to test sub-jects, employers must comply with the require-ments specified in paragraphs (a) and (c) of PartI.C.4 of this appendix (“Controlled negative pres-sure (CNP) quantitative fit testing protocol”), aswell as use the test exercises described below inparagraph (b) of this protocol instead of the testexercises specified in paragraph (b) of Part I.C.4 ofthis appendix.

(b) Employers must ensure that each test subjectbeing fit tested using this protocol follows the ex-ercise and measurement procedures, including theorder of administration, described below in TableA-1 of this appendix.


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(c) After completing the test exercises, the test ad-ministrator must question each test subject regard-ing the comfort of the respirator. When a test subjectstates that the respirator is unacceptable, the em-ployer must ensure that the test administrator re-peats the protocol using another respirator model.

(d) Employers must determine the overall fit factorfor each test subject by calculating the harmonicmean of the fit testing exercises as follows:

Where:N = The number of exercises;FF1 = The fit factor for the first exercise;FF2 = The fit factor for the second exercise; andFFN = The fit factor for the nth exercise.

Part II. New FitTest Protocols

A. Any person may submit to OSHA an applicationfor approval of a new fit test protocol. If the applica-tion meets the following criteria, OSHA will initiate arulemaking proceeding under section 6(b)(7) of theOSH Act to determine whether to list the new proto-col as an approved protocol in this Appendix A.

B. The application must include a detailed descrip-tion of the proposed new fit test protocol. This appli-cation must be supported by either:

1. A test report prepared by an independent govern-ment research laboratory (e.g., Lawrence LivermoreNational Laboratory, Los Alamos National Labora-tory, the National Institute for Standards and Tech-nology) stating that the laboratory has tested theprotocol and had found it to be accurate and reliable;or

2. An article that has been published in a peer-reviewed industrial hygiene journal describing theprotocol and explaining how test data support theprotocol’s accuracy and reliability.

C. If OSHA determines that additional information isrequired before the Agency commences a rulemak-ing proceeding under this section, OSHA will sonotify the applicant and afford the applicant the op-portunity to submit the supplemental information.Initiation of a rulemaking proceeding will be deferreduntil OSHA has received and evaluated the supple-mental information.

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Table A-1. CNP REDON Quantitative Fit Testing Protocol

Exercises(1) Exercise procedure Measurement procedure

Facing Forward Stand and breathe normally, Face forward, while holding breathwithout talking, for 30 seconds. for 10 seconds.

Bending Over Bend at the waist, as if going to touch Face parallel to the floor, whilehis or her toes, for 30 seconds. holding breath for 10 seconds

Head Shaking For about three seconds, shake head Face forward, while holding breathback and forth vigorously several times for 10 seconds.while shouting.

REDON 1 Remove the respirator mask, loosen all Face forward, while holding breathfacepiece straps, and then redon the for 10 seconds.respirator mask.

REDON 2 Remove the respirator mask, loosen all Face forward, while holding breathfacepiece straps, and then redon the for 10 seconds.respirator mask again.

1 Exercises are listed in the order in which they are to be administered.

Appendix B-1 to §1910.134:User Seal Check Procedures(Mandatory)

The individual who uses a tight-fitting respirator is toperform a user seal check to ensure that an adequateseal is achieved each time the respirator is put on. Ei-ther the positive and negative pressure checks listedin this appendix, or the respirator manufacturer’srecommended user seal check method shall be used.User seal checks are not substitutes for qualitative orquantitative fit tests.

I. Facepiece Positive and/or Negative PressureChecks

A. Positive pressure check. Close off the exhalationvalve and exhale gently into the facepiece. The facefit is considered satisfactory if a slight positive pres-sure can be built up inside the facepiece without anyevidence of outward leakage of air at the seal. Formost respirators this method of leak testing requiresthe wearer to first remove the exhalation valve coverbefore closing off the exhalation valve and then care-fully replacing it after the test.

B. Negative pressure check. Close off the inlet open-ing of the canister or cartridge(s) by covering withthe palm of the hand(s) or by replacing the filterseal(s), inhale gently so that the facepiece collapsesslightly, and hold the breath for ten seconds. The de-sign of the inlet opening of some cartridges cannotbe effectively covered with the palm of the hand. Thetest can be performed by covering the inlet openingof the cartridge with a thin latex or nitrile glove. If thefacepiece remains in its slightly collapsed conditionand no inward leakage of air is detected, the tight-ness of the respirator is considered satisfactory.

II. Manufacturer’s Recommended User SealCheck Procedures

The respirator manufacturer’s recommended pro-cedures for performing a user seal check may beused instead of the positive and/or negative pres-sure check procedures provided that the employerdemonstrates that the manufacturer’s procedures areequally effective.


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Appendix B-2 to §1910.134:Respirator Cleaning Procedures(Mandatory)

These procedures are provided for employer usewhen cleaning respirators. They are general in na-ture, and the employer as an alternative may use thecleaning recommendations provided by the manu-facturer of the respirators used by their employees,provided such procedures are as effective as thoselisted here in Appendix B- 2. Equivalent effectivenesssimply means that the procedures used must accom-plish the objectives set forth in Appendix B-2, i.e.,must ensure that the respirator is properly cleanedand disinfected in a manner that prevents damage tothe respirator and does not cause harm to the user.

I. Procedures for Cleaning Respirators

A. Remove filters, cartridges, or canisters. Disassem-ble facepieces by removing speaking diaphragms,demand and pressure-demand valve assemblies,hoses, or any components recommended by themanufacturer. Discard or repair any defective parts.

B. Wash components in warm (43 deg. C [110 deg. F]maximum) water with a mild detergent or with acleaner recommended by the manufacturer. A stiffbristle (not wire) brush may be used to facilitate theremoval of dirt.

C. Rinse components thoroughly in clean, warm (43deg. C [110 deg. F] maximum), preferably runningwater. Drain.

D. When the cleaner used does not contain a disin-fecting agent, respirator components should be im-mersed for two minutes in one of the following:

1. Hypochlorite solution (50 ppm of chlorine) madeby adding approximately one milliliter of laundrybleach to one liter of water at 43 deg. C (110 deg. F);or,

2. Aqueous solution of iodine (50 ppm iodine) madeby adding approximately 0.8 milliliters of tincture ofiodine (6-8 grams ammonium and/or potassium io-dide/100 cc of 45% alcohol) to one liter of water at 43deg. C (110 deg. F); or,

3. Other commercially available cleansers of equiva-lent disinfectant quality when used as directed, iftheir use is recommended or approved by the respi-rator manufacturer.

E. Rinse components thoroughly in clean, warm (43deg. C [110 deg. F] maximum), preferably runningwater. Drain. The importance of thorough rinsingcannot be overemphasized. Detergents or disinfec-tants that dry on facepieces may result in dermatitis.In addition, some disinfectants may cause deteriora-tion of rubber or corrosion of metal parts if not com-pletely removed.

F. Components should be hand-dried with a cleanlint-free cloth or air-dried.

G. Reassemble facepiece, replacing filters, car-tridges, and canisters where necessary.

H. Test the respirator to ensure that all componentswork properly.

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Appendix C to §1910.134:OSHA Respirator MedicalEvaluation Questionnaire(Mandatory)

To the employer: Answers to questions in Section 1,and to question 9 in Section 2 of Part A, do not re-quire a medical examination.

To the employee:

Can you read (circle one): Yes/No

Your employer must allow you to answer this ques-tionnaire during normal working hours, or at a timeand place that is convenient to you. To maintain yourconfidentiality, your employer or supervisor mustnot look at or review your answers, and your em-ployer must tell you how to deliver or send thisquestionnaire to the health care professional whowill review it.

PartA. Section 1. (Mandatory)

The following information must be provided byevery employee who has been selected to use anytype of respirator (please print).

1. Today’s date:___________________________________

2. Your name:____________________________________

3. Your age (to nearest year):______________________

4. Sex (circle one): Male/Female

5. Your height: __________ ft. __________ in.

6. Your weight: ____________ lbs.

7. Your job title:___________________________________

8. A phone number where you can be reached by thehealth care professional who reviews this question-naire (include the Area Code): ____________________

9. The best time to phone you at this number:___________________________

10. Has your employer told you how to contact thehealth care professional who will review this ques-tionnaire (circle one): Yes/No

11. Check the type of respirator you will use (you cancheck more than one category):

a. ______ N, R, or P disposable respirator (filter-mask, non-cartridge type only).b. ______ Other type (for example, half- or full-face-piece type, powered-air purifying, supplied-air, self-contained breathing apparatus).

12. Have you worn a respirator (circle one): Yes/No

If “yes,” whattype(s):_________________________________________________________________________________________________________________________________________

PartA. Section 2. (Mandatory)

Questions 1 through 9 below must be answered byevery employee who has been selected to use anytype of respirator (please circle “yes” or “no”).

1. Do you currently smoke tobacco, or have yousmoked tobacco in the last month: Yes/No

2. Have you ever had any of the following condi-tions?

Seizures (fits): Yes/NoDiabetes (sugar disease): Yes/NoAllergic reactions that interfere with yourbreathing: Yes/NoClaustrophobia (fear of closed-in places): Yes/NoTrouble smelling odors: Yes/No

3. Have you ever had any of the following pulmonaryor lung problems?

Asbestosis: Yes/NoAsthma: Yes/NoChronic bronchitis: Yes/NoEmphysema: Yes/NoPneumonia: Yes/NoTuberculosis: Yes/NoSilicosis: Yes/NoPneumothorax (collapsed lung): Yes/NoLung cancer: Yes/NoBroken ribs: Yes/NoAny chest injuries or surgeries: Yes/NoAny other lung problem that you’ve been toldabout: Yes/No

4. Do you currently have any of the following symp-toms of pulmonary or lung illness?


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Shortness of breath: Yes/NoShortness of breath when walking fast on levelground or walking up a slight hill or incline:Yes/NoShortness of breath when walking with otherpeople at an ordinary pace on level ground:Yes/NoHave to stop for breath when walking at your ownpace on level ground: Yes/NoShortness of breath when washing or dressingyourself: Yes/NoShortness of breath that interferes with your job:Yes/NoCoughing that produces phlegm (thick sputum):Yes/NoCoughing that wakes you early in the morning:Yes/NoCoughing that occurs mostly when you are lyingdown: Yes/NoCoughing up blood in the last month: Yes/NoWheezing: Yes/NoWheezing that interferes with your job: Yes/NoChest pain when you breathe deeply: Yes/NoAny other symptoms that you think may be relatedto lung problems: Yes/No

5. Have you ever had any of the following cardiovas-cular or heart problems?

Heart attack: Yes/NoStroke: Yes/NoAngina: Yes/NoHeart failure: Yes/NoSwelling in your legs or feet (not caused bywalking): Yes/NoHeart arrhythmia (heart beating irregularly): Yes/NoHigh blood pressure: Yes/NoAny other heart problem that you’ve been toldabout: Yes/No

6. Have you ever had any of the following cardiovas-cular or heart symptoms?

Frequent pain or tightness in your chest: Yes/NoPain or tightness in your chest during physicalactivity: Yes/NoPain or tightness in your chest that interferes withyour job: Yes/NoIn the past two years, have you noticed your heartskipping or missing a beat: Yes/NoHeartburn or indigestion that is not related toeating: Yes/ NoAny other symptoms that you think may be relatedto heart or circulation problems: Yes/No

7. Do you currently take medication for any of thefollowing problems?

Breathing or lung problems: Yes/NoHeart trouble: Yes/NoBlood pressure: Yes/NoSeizures (fits): Yes/No

8. If you’ve used a respirator, have you ever had anyof the following problems? (If you’ve never used arespirator, check the following space and go to ques-tion 9:)

Eye irritation: Yes/NoSkin allergies or rashes: Yes/NoAnxiety: Yes/NoGeneral weakness or fatigue: Yes/NoAny other problem that interferes with your use ofa respirator: Yes/No

9. Would you like to talk to the health care profes-sional who will review this questionnaire about youranswers to this questionnaire: Yes/No

Questions 10 to 15 below must be answered byevery employee who has been selected to use eithera full-facepiece respirator or a self-contained breath-ing apparatus (SCBA). For employees who havebeen selected to use other types of respirators, an-swering these questions is voluntary.

10. Have you ever lost vision in either eye (temporar-ily or permanently): Yes/No

11. Do you currently have any of the following visionproblems?

Wear contact lenses: Yes/NoWear glasses: Yes/NoColor blind: Yes/NoAny other eye or vision problem: Yes/No

12. Have you ever had an injury to your ears, includ-ing a broken ear drum: Yes/No

13. Do you currently have any of the following hear-ing problems?

Difficulty hearing: Yes/NoWear a hearing aid: Yes/NoAny other hearing or ear problem: Yes/No

14. Have you ever had a back injury: Yes/No

15. Do you currently have any of the following mus-culoskeletal problems?

Weakness in any of your arms, hands, legs, or feet:Yes/No

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Back pain: Yes/NoDifficulty fully moving your arms and legs: Yes/NoPain or stiffness when you lean forward or back-ward at the waist: Yes/NoDifficulty fully moving your head up or down:Yes/NoDifficulty fully moving your head side to side:Yes/NoDifficulty bending at your knees: Yes/NoDifficulty squatting to the ground: Yes/NoClimbing a flight of stairs or a ladder carryingmore than 25 lbs: Yes/NoAny other muscle or skeletal problem that inter-feres with using a respirator: Yes/No

Part B

Any of the following questions, and other questionsnot listed, may be added to the questionnaire at thediscretion of the health care professional who willreview the questionnaire.

1. In your present job, are you working at high alti-tudes (over 5,000 feet) or in a place that has lowerthan normal amounts of oxygen: Yes/No

If “yes,” do you have feelings of dizziness, short-ness of breath, pounding in your chest, or othersymptoms when you’re working under these con-ditions: Yes/No

2. At work or at home, have you ever been exposedto hazardous solvents, hazardous airborne chemicals(e.g., gases, fumes, or dust), or have you come intoskin contact with hazardous chemicals: Yes/No

If “yes,” name the chemicals if you knowthem:__________________________________________________________________________________________________________________________________________________________________________________________

3. Have you ever worked with any of the materials,or under any of the conditions, listed below:

Asbestos: Yes/NoSilica (e.g., in sandblasting): Yes/NoTungsten/cobalt (e.g., grinding or welding thismaterial): Yes/NoBeryllium: Yes/NoAluminum: Yes/NoCoal (for example, mining): Yes/NoIron: Yes/NoTin: Yes/NoDusty environments: Yes/NoAny other hazardous exposures: Yes/No

If “yes,” describe these exposures:_______________________________________________________________________________________________________________________________________________________________

4. List any second jobs or side businesses youhave:_______________________________________________________________________________________________

5. List your previous occupations:______________________________________________________________________________________________________________________

6. List your current and previous hobbies:_______________________________________________________________________________________________________________

7. Have you been in the military services? Yes/NoIf “yes,” were you exposed to biological or chemi-cal agents (either in training or combat): Yes/No

8. Have you ever worked on a HAZMAT team?Yes/No

9. Other than medications for breathing and lungproblems, heart trouble, blood pressure, andseizures mentioned earlier in this questionnaire, areyou taking any other medications for any reason (in-cluding over-the-counter medications): Yes/No

If “yes,” name the medications if you knowthem:__________________________________________

10. Will you be using any of the following items withyour respirator(s)?

HEPA Filters: Yes/NoCanisters (for example, gas masks): Yes/NoCartridges: Yes/No

11. How often are you expected to use the respira-tor(s) (circle “yes” or “no” for all answers that applyto you)?:

Escape only (no rescue): Yes/NoEmergency rescue only: Yes/NoLess than 5 hours per week: Yes/NoLess than 2 hours per day: Yes/No2 to 4 hours per day: Yes/NoOver 4 hours per day: Yes/No

12. During the period you are using the respirator(s),is your work effort:Light (less than 200 kcal per hour): Yes/No

If “yes,” how long does this period last during theaverage shift:____________hrs.____________mins.

Examples of a light work effort are sitting while


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writing, typing, drafting, or performing light as-sembly work; or standing while operating a drillpress (1-3 lbs.) or controlling machines.

Moderate (200 to 350 kcal per hour): Yes/No


Examples of moderate work effort are sitting whilenailing or filing; driving a truck or bus in urban traf-fic; standing while drilling, nailing, performing as-sembly work, or transferring a moderate load(about 35 lbs.) at trunk level; walking on a level sur-face about 2 mph or down a 5-degree grade about3 mph; or pushing a wheelbarrow with a heavyload (about 100 lbs.) on a level surface.

Heavy (above 350 kcal per hour): Yes/No


Examples of heavy work are lifting a heavy load(about 50 lbs.) from the floor to your waist orshoulder; working on a loading dock; shoveling;standing while bricklaying or chipping castings;walking up an 8-degree grade about 2 mph; climb-ing stairs with a heavy load (about 50 lbs.).

13. Will you be wearing protective clothing and/orequipment (other than the respirator) when you’reusing your respirator: Yes/No

If “yes,” describe this protective clothing and/orequipment:_____________________________________________________________________________________

14. Will you be working under hot conditions (tem-perature exceeding 77 deg. F): Yes/No

15. Will you be working under humid conditions:Yes/No

16. Describe the work you’ll be doing while you’reusing your respirator(s)________________________________________________________________________________________________________________________________

17. Describe any special or hazardous conditions youmight encounter when you’re using yourrespirator(s) (for example, confined spaces, life-threatening gases):______________________________________________________________________________________________________________________________________________________________________________________

18. Provide the following information, if you know it,for each toxic substance that you’ll be exposed towhen you’re using your respirator(s):

Name of the first toxic sustance:_________________________________________________________________Estimated maximum exposure level pershift:___________________________________________Duration of exposure pershift:___________________________________________Name of the second toxic sub-stance:_________________________________________Estimated maximum exposure level pershift:___________________________________________Duration of exposure pershift:___________________________________________Name of the third toxic sub-stance:_________________________________________Estimated maximum exposure level pershift:___________________________________________Duration of exposure pershift:___________________________________________The name of any other toxic substances that you’llbe exposed to while using your respirator:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

19. Describe any special responsibilities you’ll havewhile using your respirator(s) that may affect thesafety and well-being of others (for example, rescue,security):________________________________________________________________________________________________________________________________________________________________________________________________________

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Appendix D to §1910.134:Information for Employees UsingRespiratorsWhen Not RequiredUnder the Standard (Mandatory)

Respirators are an effective method of protectionagainst designated hazards when properly selectedand worn. Respirator use is encouraged, even whenexposures are below the exposure limit, to providean additional level of comfort and protection forworkers. However, if a respirator is used improperlyor not kept clean, the respirator itself can become ahazard to the worker. Sometimes, workers may wearrespirators to avoid exposures to hazards, even if theamount of hazardous substance does not exceed thelimits set by OSHA standards. If your employer pro-vides respirators for your voluntary use, or if youprovide your own respirator, you need to take certainprecautions to be sure that the respirator itself doesnot present a hazard.

You should do the following:

1. Read and heed all instructions provided by themanufacturer on use, maintenance, cleaning andcare, and warnings regarding the respirators limita-tions.

2. Choose respirators certified for use to protectagainst the contaminant of concern. NIOSH, the Na-tional Institute for Occupational Safety and Health ofthe U.S. Department of Health and Human Services,certifies respirators. A label or statement of certifica-tion should appear on the respirator or respiratorpackaging. It will tell you what the respirator is de-signed for and how much it will protect you.

3. Do not wear your respirator into atmospheres con-taining contaminants for which your respirator is notdesigned to protect against. For example, a respira-tor designed to filter dust particles will not protectyou against gases, vapors, or very small solid parti-cles of fumes or smoke.

4. Keep track of your respirator so that you do notmistakenly use someone else's respirator.

[63 FR 1152, Jan. 8, 1998; 63 FR 20098, 20099, April23, 1998; assembled at 69 FR 46993, Aug. 4, 2004, 71FR 16672, April 3, 2006; 71 FR 50187, August 24,2006]


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OSHA Assistance

OSHA can provide extensive help through a varietyof programs, including technical assistance about ef-fective safety and health programs, state plans, work-place consultations, voluntary protection programs,strategic partnerships, training and education, andmore. An overall commitment to workplace safetyand health can add value to your business, to yourworkplace, and to your life.

Safety and Health ProgramManagementGuidelinesEffective management of employee safety andhealth protection is a decisive factor in reducing theextent and severity of work-related injuries and ill-nesses and their related costs. In fact, an effectivesafety and health program forms the basis of goodemployee protection, can save time and money, in-crease productivity and reduce employee injuries,illnesses, and related workers’ compensation costs.

To assist employers and employees in developingeffective safety and health programs, OSHA pub-lished recommended Safety and Health ProgramManagement Guidelines (54 Federal Register (16):3904-3916, January 26, 1989). These voluntary guide-lines can be applied to all places of employment cov-ered by OSHA.

The guidelines identify four general elements crit-ical to the development of a successful safety andhealth management system:� Management leadership and employee involve-

ment,� Worksite analysis,� Hazard prevention and control, and� Safety and health training.

The guidelines recommend specific actions,under each of these general elements, to achieve aneffective safety and health program. The FederalRegister notice is available online at www.osha.gov.

State ProgramsThe Occupational Safety and Health Act of 1970(OSH Act) encourages states to develop and operatetheir own job safety and health plans. OSHA ap-proves and monitors these plans. Twenty-four states,Puerto Rico, and the Virgin Islands currently operateapproved state plans: 22 cover both private and pub-lic (state and local government) employment; Con-necticut, New Jersey, New York, and the VirginIslands cover the public sector only. States and terri-tories with their own OSHA-approved occupationalsafety and health plans must adopt standards identi-

cal to, or at least as effective as, the Federal OSHAstandards.

Consultation ServicesConsultation assistance is available on request toemployers who want help in establishing andmaintaining a safe and healthful workplace.Largely funded by OSHA, the service is provided atno cost to the employer. Primarily developed forsmaller employers with more hazardous opera-tions, the consultation service is delivered by stategovernments employing professional safety andhealth consultants. Comprehensive assistance in-cludes an appraisal of all mechanical systems,work practices, and occupational safety and healthhazards of the workplace and all aspects of the em-ployer’s present job safety and health program. Inaddition, the service offers assistance to employersin developing and implementing an effective safetyand health program. No penalties are proposed orcitations issued for hazards identified by the con-sultant. OSHA provides consultation assistance tothe employer with the assurance that his or hername and firm and any information about theworkplace will not be routinely reported to OSHAenforcement staff.

Under the consultation program, certain exem-plary employers may request participation in OSHA’sSafety and Health Achievement Recognition Program(SHARP). Eligibility for participation in SHARP in-cludes receiving a comprehensive consultation visit,demonstrating exemplary achievements in work-place safety and health by abating all identified haz-ards, and developing an excellent safety and healthprogram.

Employers accepted into SHARP may receive anexemption from programmed inspections (notcomplaint or accident investigation inspections) fora period of 1 year. For more information concern-ing consultation assistance, see OSHA’s website atwww.osha.gov.

Voluntary Protection Programs (VPP)Voluntary Protection Programs and on-site consulta-tion services, when coupled with an effective en-forcement program, expand employee protection tohelp meet the goals of the OSH Act. The VPPs moti-vate others to achieve excellent safety and health re-sults in the same outstanding way as they establish acooperative relationship between employers, em-ployees, and OSHA.

For additional information on VPP and how toapply, contact the OSHA regional offices listed at theend of this publication.

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Strategic Partnership ProgramOSHA’s Strategic Partnership Program, the newestmember of OSHA’s cooperative programs, helpsencourage, assist, and recognize the efforts of part-ners to eliminate serious workplace hazards andachieve a high level of employee safety and health.Whereas OSHA’s Consultation Program and VPPentail one-on-one relationships between OSHA andindividual worksites, most strategic partnershipsseek to have a broader impact by building coopera-tive relationships with groups of employers and em-ployees. These partnerships are voluntary,cooperative relationships between OSHA, employ-ers, employee representatives, and others (e.g.,trade unions, trade and professional associations,universities, and other government agencies).

For more information on this and other coopera-tive programs, contact your nearest OSHA office, orvisit OSHA’s website at www.osha.gov.

Alliance ProgramThrough the Alliance Program, OSHA works withgroups committed to safety and health, includingbusinesses, trade or professional organizations,unions and educational institutions, to leverage re-sources and expertise to develop compliance as-sistance tools and resources and shareinformation with employers and employees to helpprevent injuries, illnesses and fatalities in the work-place.

Alliance program agreements have been estab-lished with a wide variety of industries includingmeat, apparel, poultry, steel, plastics, maritime, print-ing, chemical, construction, paper and telecommuni-cations. These agreements are addressing manysafety and health hazards and at-risk audiences, in-cluding silica, fall protection, amputations, immi-grant workers, youth and small businesses. Bymeeting the goals of the Alliance Program agree-ments (training and education, outreach and com-munication, and promoting the national dialogue onworkplace safety and health), OSHA and the AllianceProgram participants are developing and disseminat-ing compliance assistance information and re-sources for employers and employees such aselectronic assistance tools, fact sheets, toolbox talks,and training programs.

OSHATraining and EducationOSHA area offices offer a variety of information serv-ices, such as compliance assistance, technical ad-vice, publications, audiovisual aids, and speakers forspecial engagements. OSHA’s Training Institute inArlington Heights, IL, provides basic and advancedcourses in safety and health for Federal and state

compliance officers, state consultants, Federal agencypersonnel, and private sector employers, employees,and their representatives.

The OSHA Training Institute also has establishedOSHA Training Institute Education Centers to ad-dress the increased demand for its courses from theprivate sector and from other federal agencies.These centers include colleges, universities, andnonprofit training organizations that have been se-lected after a competition for participation in the pro-gram.

OSHA also provides funds to nonprofit organiza-tions, through grants, to conduct workplace trainingand education in subjects where OSHA believesthere is a lack of workplace training. Grants areawarded annually. Grant recipients are expected tocontribute 20 percent of the total grant cost.

For more information on training and education,contact the OSHA Training Institute, Directorate ofTraining and Education, 2020 South ArlingtonHeights Road, Arlington Heights, IL, 60005, (847) 297-4810, or see Training on OSHA’s website atwww.osha.gov. For further information on any OSHAprogram, contact your nearest OSHA regional officelisted at the end of this publication.

InformationAvailable ElectronicallyOSHA has a variety of materials and tools availableon its website at www.osha.gov. These include elec-tronic compliance assistance tools, such as Safetyand HealthTopics Pages, eTools, Expert Advisors;regulations, directives, publications and videos; andother information for employers and employees.OSHA’s software programs and compliance assis-tance tools walk you through challenging safety andhealth issues and common problems to find the bestsolutions for your workplace.

A wide variety of OSHA materials, including stan-dards, interpretations, directives, and more can bepurchased on CD-ROM from the U.S. GovernmentPrinting Office, Superintendent of Documents, toll-free phone (866) 512-1800.

OSHA PublicationsOSHA has an extensive publications program. For alisting of free items, visit OSHA’s website atwww.osha.gov or contact the OSHA PublicationsOffice, U.S. Department of Labor, 200 ConstitutionAvenue, NW, N-3101, Washington, DC 20210; tele-phone (202) 693-1888 or fax to (202) 693-2498.

Contacting OSHATo report an emergency, file a complaint, or seekOSHA advice, assistance, or products, call (800) 321-


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OSHA or contact your nearest OSHA Regional officelisted at the end of this publication. The teletype-writer (TTY) number is (877) 889-5627.

Written correspondence can be mailed to thenearest OSHA Regional or Area Office listed at theend of this publication or to OSHA’s national officeat: U.S. Department of Labor, Occupational Safetyand Health Administration, 200 Constitution Avenue,N.W., Washington, DC 20210.

By visiting OSHA’s website at www.osha.gov, youcan also:� File a complaint online,� Submit general inquiries about workplace safety

and health electronically, and� Find more information about OSHA and occupa-

tional safety and health.

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OSHA Regional Offices

Region I(CT,* ME, MA, NH, RI, VT*)JFK Federal Building, Room E340Boston, MA 02203(617) 565-9860

Region II(NJ,* NY,* PR,* VI*)201 Varick Street, Room 670New York, NY 10014(212) 337-2378

Region III(DE, DC, MD,* PA, VA,* WV)The Curtis Center170 S. Independence Mall WestSuite 740 WestPhiladelphia, PA 19106-3309(215) 861-4900

Region IV(AL, FL, GA, KY,* MS, NC,* SC,* TN*)61 Forsyth Street, SW, Room 6T50Atlanta, GA 30303(404) 562-2300

RegionV(lL, IN,* MI,* MN,* OH, WI)230 South Dearborn StreetRoom 3244Chicago, IL 60604(312) 353-2220

RegionVI(AR, LA, NM,* OK, TX)525 Griffin Street, Room 602Dallas, TX 75202(972) 850-4145

RegionVII(IA,* KS, MO, NE)Two Pershing Square2300 Main Street, Suite 1010Kansas City, MO 64108-2416(816) 283-8745

RegionVIII(CO, MT, NO, SO, UT,* WY*)1999 Broadway, Suite 1690PO Box 46550Denver, CO 80202-5716(720) 264-6550

Region IX(AZ,* CA,* HI,* NV,* and American Samoa,Guam and the Northern Mariana Islands)90 7th Street, Suite 18-100San Francisco, CA 94103(415) 625-2547

Region X(AK,* ID, OR,* WA*)1111 Third Avenue, Suite 715Seattle, WA 98101-3212(206) 553-5930

* These states and territories operate their own OSHA-ap-proved job safety and health programs and cover stateand local government employees as well as private sectoremployees. The Connecticut, New Jersey, New York andVirgin Islands plans cover public employees only. Stateswith approved programs must have standards that areidentical to, or at least as effective as, the Federal OSHAstandards.

Note: To get contact information for OSHA Area Offices,OSHA-approved State Plans and OSHA Consultation Proj-ects, please visit us online at www.osha.gov or call us at 1-800-321-0SHA.

(OOC 02/2009)