[Federal Register Volume 85, Number 72 (Tuesday, April 14, 2020)]
[Rules and Regulations]
[Pages 20598-20611]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-07804]


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DEPARTMENT OF HEALTH AND HUMAN SERVICES

42 CFR Part 84

[Docket No. CDC-2020-0036; NIOSH-335]
RIN 0920-AA69


Approval Tests and Standards for Air-Purifying Particulate 
Respirators

AGENCY: Centers for Disease Control and Prevention, HHS.

ACTION: Interim final rule with comment.

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SUMMARY: The Department of Health and Human Service (HHS) is publishing 
this interim final rule to update the regulatory requirements used by 
the Centers for Disease Control and Prevention's (CDC) National 
Institute for Occupational Safety and Health (NIOSH) to test and 
approve air-purifying particulate respirators for use in the ongoing 
public health emergency. With this rulemaking, parallel performance 
standards are added to existing regulatory requirements for PAPRs to 
allow for the approval of respirators in a new class, PAPR100, that may 
be better suited to the needs of workers in the healthcare and public 
safety sectors currently experiencing a shortage of air-purifying 
particulate respirators due to Coronavirus Disease 2019 (COVID-19), the 
disease caused by severe acute respiratory syndrome coronavirus 2 
(SARS-CoV-2). This rulemaking also consolidates the technical standards 
for all types of air-purifying particulate respirators into one 
subpart, and standards pertaining to obsolete respirators designed for 
dust, fume, and mist; pesticide; and paint spray are removed from the 
regulation entirely. This rulemaking will have no substantive impact on 
the continued certification testing and approval by the NIOSH National 
Personal Protective Technology Laboratory of existing PAPR class HE 
(high-efficiency series) respirators or non-powered air-purifying 
particulate respirators, including N95 filtering facepiece respirators, 
currently in demand by healthcare workers and emergency responders. 
NIOSH expects

[[Page 20599]]

that the addition of PAPR100 devices to the marketplace will help to 
relieve the current high demand for possibly hundreds of thousands of 
additional particulate filtering facepiece respirators needed 
specifically for healthcare and emergency medical response settings.

DATES: This rule is effective on April 14, 2020. Comments must be 
received by August 12, 2020.

ADDRESSES: 
    Written comments: Comments may be submitted by any of the following 
methods:
     Federal eRulemaking Portal: http://www.regulations.gov. 
Follow the instructions for submitting comments to the docket.
     Mail: NIOSH Docket Office, Robert A. Taft Laboratories, 
MS-C34, 1090 Tusculum Avenue, Cincinnati, OH 45226.
    Instructions: All submissions received must include the agency name 
(Centers for Disease Control and Prevention, HHS) and docket number 
(CDC-2020-0036; NIOSH-335) or Regulation Identifier Number (0920-AA69) 
for this rulemaking. All relevant comments, including any personal 
information provided, will be posted without change to http://www.regulations.gov. For detailed instructions on submitting public 
comments, see the ``Public Participation'' heading of the SUPPLEMENTARY 
INFORMATION section of this document.

FOR FURTHER INFORMATION CONTACT: Jeffrey Palcic, NIOSH National 
Personal Protective Technology Laboratory (NPPTL), Pittsburgh, PA, 
(412) 386-5247 (this is not a toll-free number). Information requests 
can also be submitted by email to [email protected].

SUPPLEMENTARY INFORMATION: 

I. Public Participation

    Interested parties may participate in this rulemaking by submitting 
written views, opinions, recommendations, and data. Comments received, 
including attachments and other supporting materials, are part of the 
public record and subject to public disclosure. Any information in 
comments or supporting materials that is not intended to be disclosed 
should not be included. Comments may be submitted on any topic related 
to this interim final rulemaking, including the following:
    [ssquf] What operational and/or functional characteristics should 
be considered in establishing a standard for a healthcare PAPR?
    [ssquf] Should there be more than one class of healthcare PAPR, for 
example, surgical versus non-surgical?

II. Statutory Authority

    Pursuant to the Occupational Safety and Health (OSH) Act of 1970 
(Pub. L. 91-596), the Organic Act of 1910 (Pub. L. 179), and the 
Federal Mine Safety and Health Act of 1977 (Pub. L. 91-173 (codified at 
30 U.S.C. 842(h), 844, 957)), NIOSH is authorized to approve 
respiratory equipment used in mines and other workplaces for the 
protection of employees potentially exposed to hazardous breathing 
atmospheres. The Occupational Safety and Health Administration (OSHA) 
requires U.S. employers to supply NIOSH-approved respirators to their 
employees whenever the employer requires the use of a respirator. (29 
CFR 1910.134(d))

III. Background

A. Introduction

    Air-purifying respirators use either filters, cartridges, or 
canisters (or combinations of filters and cartridges or filters and 
canisters), to protect users from gases; vapors; aerosols, including 
viruses capable of being transmitted by aerosolized droplets; and other 
contaminants in the air. Since these respirators simply purify the 
ambient atmosphere and do not provide an independent supply of 
breathing air to the wearer, most types cannot be used in atmospheres 
that are immediately dangerous to life and health (IDLH).\1\ Air-
purifying particulate respirators, a subclass of air-purifying 
respirators, are approved by NIOSH pursuant to 42 CFR part 84. 
Currently, testing and performance standards for non-powered air-
purifying particulate respirators are codified in part 84, subpart K; 
standards for powered air-purifying particulate respirators are 
codified in subpart KK.
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    \1\ With the exception of gas masks designed for escape from 
IDLH atmospheres. See 42 CFR 84, subpart I--Gas Masks.
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    Non-powered air-purifying particulate respirators include filtering 
facepiece respirators and elastomeric half- and full-facepiece 
respirators, and are used in a very wide variety of work settings.
    Powered air-purifying particulate respirators (PAPRs) are used in 
many similar work settings and are distinguished from the non-powered 
type by the powered blower that moves air through the attached filters, 
canisters, and/or cartridges. This respirator type comes in a variety 
of sizes, weights, and mounting configurations. PAPRs play an integral 
role in respiratory protection programs across multiple sectors, 
including general industry, healthcare, and police operations.
    Current regulatory standards provide for the NIOSH approval of 
high-efficiency (HE) particulate filters which are incorporated into 
PAPRs. The NIOSH National Personal Protective Technology Laboratory has 
determined the need for increasing the utility of PAPRs in the 
workplace and offering a wider array of options for today's work 
practices. Although the current PAPR approval program has proven 
protections, these interim requirements offer the potential to extend 
the same proven level of protection to smaller, lighter systems which 
may be more comfortable to wear, as discussed below.

B. PAPR Certification and Approval

    NIOSH currently approves PAPRs under 42 CFR part 84, Approval of 
Respiratory Protective Devices. Within part 84, subpart KK, Dust, Fume 
and Mist; Pesticide; Paint Spray; Powered Air-Purifying High Efficiency 
Respirators and Combination Gas Masks, specifies testing and 
certification requirements for PAPRs with high-efficiency particulate 
filters. NIOSH reviews and approves such respirators for use, for 
example, by industrial, healthcare, and public safety workers.

C. Scope of the Rulemaking

    This rulemaking applies to air-purifying particulate respirators 
and gas and vapor respirators which also incorporate a particulate 
filter. NIOSH is (1) consolidating all air-purifying, particulate 
respirator requirements, whether powered or non-powered, into subpart 
K; (2) eliminating unneeded and archaic parts of the standard related 
to PAPRs which were left in place since the 1995 promulgation of part 
84; and (3) better aligning PAPR particulate filter testing for a new 
class of PAPR with the requirements for non-powered particulate 
respirators which were established in the 1995 rulemaking.
    With this rulemaking, a new class of PAPR is established, PAPR100, 
in parallel with the current PAPR class HE, to open opportunities for 
designs offering the characteristics desired by many end-users, as 
revealed through user-sector input following the public meetings in 
2003-2008 and a 2014 Institute of Medicine workshop, discussed below. 
PAPRs tested to the current requirements relocated from subpart KK are 
designated series ``HE''; those requirements are otherwise unchanged. 
PAPR100s tested to the new alternative testing and approval 
requirements are designated either series ``PAPR100-N,'' which is not 
for use against oil-based aerosols, or

[[Page 20600]]

``PAPR100-P,'' which is strongly resistant to oil aerosols.
    Requirements for the current class HE are unchanged because those 
devices have a proven track record and widespread use. The existing HE 
requirements result in the approval of PAPRs that are well-suited to 
heavy industry settings where the particulates of concern may be dense 
in terms of their airborne concentration. In those settings, the PAPR 
is often unavoidably challenged to remove a large quantity of larger, 
non-respirable particles while it is doing the important work of 
removing the much smaller, but much more hazardous, respirable-sized 
particles. While the existing silica dust test specified in subpart KK 
demonstrates a portion of the unit's ability to remove the respirable-
sized particles, it is a very good test to demonstrate the PAPR's 
ability to provide ongoing filtration across the wider aerosol size 
spectrum in these ``dirtier'' industrial settings. With this 
rulemaking, NIOSH is promulgating a new standard for the new class 
PAPR100, which replaces the silica dust test with a sodium chloride 
aerosol when testing PAPR100-N series filters, and with a dioctyl 
phthalate aerosol when testing PAPR100-P series filters. NIOSH will not 
designate either class specifically for industrial or non-industrial 
use, but it is thought that the PAPR class HEs will continue to be the 
design of choice in industrial settings. Since protections provided by 
the current class HE respirators are considered equivalent to the 
protections expected by the new PAPR100 devices, respiratory safety 
continues to be assured, regardless of the setting.
    This rulemaking also eliminates the requirements for other obsolete 
types of respirators, including dust, fume, and mist; pesticide; and 
paint spray respirators identified in current subpart KK. Subpart KK is 
removed from part 84 in its entirety.

D. Need for Rulemaking

    PAPRs are often used in high-hazard procedures in the healthcare 
setting because they are designed to filter chemicals, blood-borne 
pathogens, and aerosol-transmissible diseases. However, the size and 
weight of the PAPRs approved under the current regulations has been 
said to limit their widespread adoption in healthcare and by first 
responders. The current requirements for PAPR class HE (high-efficiency 
series) contained in 42 CFR part 84 were established in 1972 primarily 
for more industrial-type uses and exposures, such as mining and milling 
operations. The silica dust loading test is currently incorporated 
among the requirements which determine the PAPR filter efficiency. In 
order to pass the silica dust test, current NIOSH-approved PAPRs must 
provide a high flow of breathing air against a highly loaded filter for 
a duration of 4 hours. This generally results in approved PAPRs having 
blowers and batteries which may be inconveniently large, heavy, or 
both. Respirator designers and end-users have expressed a desire for 
greater latitude in the regulatory requirements in order to reduce the 
bulk and weight of currently approved PAPR class HE devices, given the 
advances in modern battery and sensor technology that would allow for 
smaller, lighter designs with service durations continuously monitored 
by required flow-detection devices.
    During the past 20 years, PAPRs have played an increasing role in 
respiratory protection programs in the United States in sectors beyond 
general industry, including healthcare. PAPRs are also frequently 
considered for public safety and other specialized industrial uses. The 
2002 Severe Acute Respiratory Syndrome (SARS), the 2009 H1N1 influenza, 
and the 2014 Ebola virus outbreaks ushered in more extensive use of 
respiratory protection, and specifically PAPRs, for today's 18 million 
healthcare workers.
    In a 2014 assessment designed to quantify the amount of personal 
protective equipment held in U.S. acute care hospitals, the Association 
of States and Territorial Health Officials (ASTHO) estimated that acute 
care hospitals across the United States had no more than 83,196 PAPRs 
on-hand in 2012 compared with 114,694,159 N95s, demonstrating that the 
currently approved PAPRs are not as widely-used in healthcare as the 
N95s.\2\ However, the Association for Professionals in Infection 
Control and Epidemiology (APIC) reported that healthcare employers are 
expected to increase the relative number of PAPRs used in healthcare as 
the devices become less expensive and lighter.\3\ PAPRs have a number 
of advantages over N95 filtering facepiece respirators, including that 
they are reusable and can be cleaned and disinfected, loose-fitting 
PAPR do not need to be fit tested and often can be worn with facial 
hair, and have a higher assigned protection factor (as determined by 
the Occupational Safety and Health Administration in the Department of 
Labor). Designs not requiring fit testing are expected to be especially 
advantageous in a public health emergency, such as the Coronavirus 
Disease 2019 (COVID-19) response, by saving resources including both 
person-hours and the need to fit test multiple makes and models to find 
the right fit for an individual worker. Loose-fitting PAPR designs are 
also typically equipped with a head covering that delivers filtered air 
over the user's entire head, including the eyes and hair, thus offering 
greater overall protection from contact with any airborne infectious 
agents.
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    \2\ ASTHO, Assessment of Respiratory Personal Protective 
Equipment in U.S. Acute Care Hospitals--2012 (2014).
    \3\ See APIC public comment submitted to NIOSH Docket-272 for 
National Institute for Occupational Safety and Health, CDC, 
Respiratory Protective Devices Used in Healthcare; Notice of Request 
for Information and Comment, 79 FR 14515 [March 14, 2014].
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    Healthcare workers and first responders are on the front line of 
efforts to contain COVID-19, the disease caused by severe acute 
respiratory syndrome coronavirus 2 (SARS-CoV-2). The virus is thought 
to spread primarily by person-to-person contact through respiratory 
droplets produced when an infected person coughs or sneezes; it may 
also spread through contact with contaminated surfaces or objects. The 
ease of SARS-CoV-2 transmission has resulted in a surge in 
hospitalizations in many jurisdictions, resulting in a well-documented 
shortage of personal protective equipment, especially respiratory 
protection, for healthcare workers and emergency responders. An APIC 
survey conducted March 23-24, 2020 found that 20 percent of respondents 
indicated they do not have any respirators and 61 percent of 
respondents indicated they are almost out of respirators. Only 18 
percent of respondents said they have a sufficient number of 
respirators.\4\
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    \4\ APIC, Protecting Healthcare Workers During the COVID-19 
Pandemic: A Survey of Infection Preventionists (March 27, 2020), 
https://apic.org/wp-content/uploads/2020/03/Protecting-Healthcare-Workers-Survey_Report_3_26_20_Final.pdf.
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    Between March 16 and April 3, 2020, five potential approval holders 
seeking to develop PAPRs to support the COVID-19 response solicited 
NIOSH to explore the possibility of producing PAPRs for healthcare and 
emergency responders to increase the inventory of PAPRs across the 
nation. NIOSH expects that PAPR100s will be purchased to replace the 
current inventory of larger class HE devices designed for industrial 
use, as well as to substitute for the use of disposable N95 filtering 
facepiece respirators which require fit testing for effective use. 
NIOSH expects that the addition of PAPR100 devices to the marketplace 
will help to relieve the current high demand for possibly hundreds of

[[Page 20601]]

thousands of additional particulate filtering facepiece respirators 
designed specifically for healthcare settings.

E. History of the PAPR100 Concept

    NIOSH held a series of public meetings from 2003 through 2008 to 
discuss technical issues regarding a new PAPR concept.\5\ Participants 
raised issues regarding the existing PAPR certification requirements 
and offered input on the need to eliminate the silica dust test and 
incorporate warnings for low air flow, pressure, and/or battery life.
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    \5\ Transcripts of the public meetings as well as presentations 
and submissions from interested parties are available in NIOSH 
Dockets 008 and 008a.
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    In response to the growing number of PAPRs in healthcare, NIOSH 
sponsored an Institute of Medicine (IOM) workshop on the ``Use and 
Effectiveness of PAPRs in Healthcare'' in 2014.\6\ The intent of the 
workshop was to assist NIOSH with prioritizing and updating approval 
requirements for NIOSH-approved PAPRs suitable for use in the 
healthcare sector. IOM workshop participants included government 
agencies, healthcare institutions, professional associations, 
respirator manufacturers, and unions representing healthcare workers. A 
general finding from the IOM workshop stated that current PAPR 
requirements are not always suitable for the healthcare work 
environment. Workshop participants indicated that powered air-purifying 
respirators should have the following attributes:
---------------------------------------------------------------------------

    \6\ IOM [2015], The Use and Effectiveness of Powered Air 
Purifying Respirators in Health Care: Workshop Summary (National 
Academies Press: Washington, DC).
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     Suitable for use in sterile field;
     Good visibility and communication;
     Ease of donning, doffing, and cleaning;
     Variable flows based on work rates;
     Smaller and less bulky;
     Sensors and alarms that monitor flow and power; and
     Training materials as part of certification.
    In addition to the IOM workshop, NIOSH reached out to the 
International Safety Equipment Association (ISEA) and 10 manufacturers 
of NIOSH-approved PAPRs in August and September 2016 to better 
understand how current requirements impact PAPR designs and how today's 
technologies are being integrated into PAPR designs. According to the 
input NIOSH received, the aerosol threat in the healthcare setting, as 
compared with the industrial settings the current PAPR class HE 
requirements in part 84 are designed to address, is composed mainly of 
respirable-sized (or smaller) particles, with practically no other 
larger particles in the mix. Therefore, the ability to continue to 
provide needed air flow against high total filter loading is not a 
necessary consideration for PAPRs suitable for use in the healthcare 
setting. These experts indicated the following main areas of concern:

    1. Silica dust testing adds to the size and weight of PAPR 
systems.
    2. Silica dust test equipment is outdated and the test is a 
challenge to reproduce, not representative of today's workplace dust 
conditions, and requires operational safeguards to avoid the test 
operator's hazardous exposure to silica dust.
    3. If the PAPR continuously monitors critical conditions such as 
flow, pressure, and battery life, the silica dust test would not be 
needed since the complete system is also evaluated with a 
quantitative human subject testing (corn oil test).
    4. Technologies such as sensors and alarms for monitoring 
airflow rate, battery life, facepiece pressure, and other critical 
components are being integrated into many of today's PAPR designs. 
The current PAPR requirements prevent these technologies from being 
fully deployed.

    NIOSH presented its new PAPR concept at the 2016 biennial 
International Society for Respiratory Protection (ISRP) conference in 
Yokohama, Japan and the 2017 meetings of the ISRP Americas Section in 
Pittsburgh, Pennsylvania and the National Academies Standing Committee 
on Personal Protective Equipment for Workplace Safety and Health. 
Attendees of these meetings generally supported the concepts presented.
    By modifying and replacing some of the current PAPR requirements, 
NIOSH would enable manufacturers to take advantage of contemporary 
technology that could result in smaller and lighter-weight PAPRs having 
the same effective particulate protections while increasing workplace 
utility for today's diverse workforces. The addition of requirements 
for NIOSH-approved PAPRs intended for healthcare and other settings 
with lower overall particulate presence would allow stakeholders to 
incorporate additional technologies such as integrated circuits, 
sensors, batteries, motors, plastics, and fabrics to improve PAPR 
designs intended to be used in cleaner settings, such as healthcare.

F. Impact on Rulemaking and Other Activities of OSHA

    The interim final rule would not require OSHA to make any changes 
to 29 CFR 1910.134, the OSHA respiratory protection requirements.

IV. Issuance of an Interim Final Rule With Immediate Effective Date

    Rulemaking under the Administrative Procedure Act (APA) generally 
requires a public notice and comment period and consideration of the 
submitted comments prior to promulgation of a final rule (5 U.S.C. 
553). However, the APA provides for exceptions to its notice and 
comment procedures when an agency finds that there is good cause for 
dispensing with such procedures on the basis that they are 
impracticable, unnecessary, or contrary to the public interest. In 
accordance with the provisions in 5 U.S.C. 553(b)(B), HHS finds good 
cause to waive the use of prior notice and comment procedures for this 
interim final rule and to make this action effective immediately.
    This interim final rule amends 42 CFR part 84 to allow respirator 
manufacturers to produce an equally protective or equivalent new class 
of PAPR, the PAPR100, including both N-series and P-series particulate 
respirators, designed for use in healthcare or other workplace settings 
that will benefit the most from smaller, lighter devices. HHS has 
determined that it is impracticable to use prior notice and comment 
procedures for this interim final rule because of the ongoing public 
health emergency. As discussed above, respirator manufacturers have 
participated in discussions with NIOSH about the need for these new 
standards and are generally supportive of this effort. Recently, some 
manufacturers have notified NIOSH that they are ready to submit 
approval applications for PAPR100s that would be employable in the 
current public health emergency as soon as the effective date of this 
interim final rule. Thus, HHS is waiving the prior notice and comment 
procedures in the interest of protecting the health of healthcare 
workers and emergency responders who are on the front lines of the 
current public health emergency as soon as possible.
    Under 5 U.S.C. 553(d)(3), HHS also finds good cause to make this 
interim final rule effective immediately. As stated above, in order to 
protect the health of healthcare workers and emergency responders, it 
is necessary that HHS act quickly to amend the existing standards in 42 
CFR part 84 to allow NIOSH to approve a new class of PAPR suitable for 
use in healthcare settings. The addition of this new class of 
respirator to the market will improve safety of healthcare workers 
because it will result in the development of PAPRs that are less bulky, 
less noisy, and more suitable for use in healthcare and emergency 
response settings to meet the

[[Page 20602]]

immediate needs of those treating patients during the COVID-19 
pandemic. The cost of these devices is expected to be lower than the 
costs of PAPRs currently on the market. Loose-fitting PAPRs do not 
require fit testing, and because the devices are reusable and have a 
higher filter efficiency and higher assigned protection factor, thus 
they are a cost-effective alternative to other respiratory protective 
devices currently on the market. Because these PAPRs are reusable, it 
is likely that 1 percent of the stock of PAPRs would be required 
compared to that of single-use items such as the N95 filtering 
facepiece respirator, assuming the ability to reuse a PAPR one hundred 
times. Healthcare organizations using PAPRs in healthcare settings have 
reported cleaning their PAPR filters for several years prior to 
replacement, which is well beyond the 1 percent estimate.
    While amendments to part 84 are effective on the date of 
publication of this interim final rule, we request public comment on 
this rule. After full consideration of public comments, HHS will 
publish a final rule with any necessary changes. (See Section I. Public 
Participation, above.)

V. Summary of Interim Final Rule

    As discussed above, this interim final rule consolidates all air-
purifying particulate respirator requirements in 42 CFR part 84, 
subpart K, and establishes alternative requirements for the testing and 
approval of class PAPR100 respirators designed for use in settings such 
as healthcare, public safety, and other workplaces that require or 
otherwise place a premium on the use of smaller, lighter devices. Other 
existing sections in part 84 that reference subpart KK are updated as 
necessary.
    The table directly below matches the reorganized part 84, subpart 
K, with the originating sections in the current regulation. These 
changes are discussed in full below the table.

                                   Reorganization and Section Title Amendments
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----------------------------------------------------------------------------------------------------------------
Interim final rule section                       Originating section
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84.170(a)....................  Non-powered air-purifying  84.170......................  Non-powered air-
                                particulate respirators                                  purifying particulate
                                (series N, R, and P).                                    respirators;
                                                                                         description.
84.170(b)....................  Powered air-purifying      84.1100(d)..................  Scope and effective
                                particulate respirators                                  dates--powered air-
                                (PAPR classes HE and                                     purifying particulate
                                PAPR100).                                                respirator.
                                                          84.1130(a)(4)...............  Respirators,
                                                                                         description--air-
                                                                                         purifying respirators.
                                                                                        New for PAPR100 class.
84.171.......................  Required components and    84.171......................  Non-powered air-
                                attributes.                                              purifying particulate
                                                                                         respirators; required
                                                                                         components.
                                                          84.1131.....................  Respirators; required
                                                                                         components.
84.171(a)....................  Respiratory inlet          84.175......................  Half-mask facepiece,
                                covering.                                                full facepiece, hoods,
                                                                                         helmets, and
                                                                                         mouthpieces; fit;
                                                                                         minimum requirements.
                                                          84.171(a)...................  Non-powered air-
                                                                                         purifying particulate
                                                                                         respirators; required
                                                                                         components.
                                                          84.1135.....................  Half-mask facepiece,
                                                                                         full facepiece, hoods,
                                                                                         helmets, and
                                                                                         mouthpieces; fit;
                                                                                         minimum requirements.
                                                          84.1136.....................  Facepieces, hoods, and
                                                                                         helmets; eyepieces;
                                                                                         minimum requirements.
84.171(b)(1).................  Filters for non-powered    84.179......................  Non-powered air-
                                respirators.                                             purifying particulate
                                                                                         respirators; filter
                                                                                         identification.
84.171(b)(2).................  Filters for powered        84.1130(a)(4)...............  Respirators;
                                respirators.                                             description--Powered
                                                                                         air-purifying
                                                                                         particulate
                                                                                         respirators; filter
                                                                                         identification.
84.171(c)....................  Valves...................  84.177 84.1137..............  Inhalation and
                                                                                         exhalation valves;
                                                                                         minimum requirements.
84.171(d)....................  Head harness.............  84.178, 84.1138.............  Head harness; minimum
                                                                                         requirements.
84.171(e)....................  Breathing tube...........  84.172 84.1132..............  Breathing tubes; minimum
                                                                                         requirements.
84.171(f)....................  Drink tube...............  ............................  New.
84.171(g)....................  Container................  84.174 84.1134..............  Respirator containers;
                                                                                         minimum requirements.
84.171(h)....................  Harness..................  84.173 84.1133..............  Harnesses; Installation
                                                                                         and construction;
                                                                                         minimum requirements.
84.171(i)....................  Attached blower..........  84.1156(f)..................  Minimum air flows.
84.171(j)....................  Low-flow warning device..  ............................  New.
84.172.......................  Airflow resistance test..  84.180......................  Airflow resistance
                                                                                         tests.
                                                          84.1156(a)(1) and (2).......  Pesticide respirators;
                                                                                         performance
                                                                                         requirements; general--
                                                                                         breathing resistance
                                                                                         test.
                                                          84.1157(a)..................  Chemical cartridge
                                                                                         respirators with
                                                                                         particulate filters;
                                                                                         performance
                                                                                         requirements; general--
                                                                                         breathing resistance
                                                                                         test.
84.173.......................  Exhalation valve leakage   84.182 84.1150..............  Exhalation valve leakage
                                test.                                                    test; minimum
                                                                                         requirements.
84.174.......................  Filter efficiency level    84.181......................  Non-powered air-
                                determination test--non-                                 purifying particulate
                                powered series N, R, and                                 filter efficiency level
                                P filtration.                                            determination.
84.175.......................  Instantaneous filter       84.1151.....................  DOP filter test.
                                efficiency level          84.1156(c)(2)...............  Pesticide respirators;
                                determination test--PAPR                                 performance
                                series HE, PAPR100-N,                                    requirements; general--
                                and PAPR100-P filtration.                                silica dust test.
84.176(a)....................  Isoamyl acetate (IAA) fit  84.1156(b)(5)...............  Pesticide respirators;
                                test.                                                    performance
                                                                                         requirements; general--
                                                                                         isoamyl acetate
                                                                                         tightness test.
84.176(b)....................  Generated Aerosol........  ............................  New.
84.177.......................  Total noise level test--   84.1139.....................  Air velocity and noise
                                PAPR classes HE and                                      levels; hoods and
                                PAPR100.                                                 helmets.

[[Page 20603]]

 
84.178.......................  Breath response type,      ............................  New.
                                airflow resistance test--
                                PAPR classes HE and
                                PAPR100.
84.179.......................  Silica dust loading test-- 84.1144.....................  Silica dust test for
                                PAPR series HE                                           dust, fume, and mist
                                filtration.                                              respirators; single-use
                                                                                         or reusable filters;
                                                                                         minimum requirements.
                                                          84.1152.....................  Silica dust loading
                                                                                         test.
84.180.......................  Particulate loading test-- ............................  New.
                                PAPR series PAPR100-N
                                and PAPR100-P filtration.
84.181.......................  Communication performance  ............................  New.
                                test--class PAPR100.
----------------------------------------------------------------------------------------------------------------

Section 84.2 Definitions

    In this existing section, located in 42 CFR part 84, subpart A, HHS 
adds definitions for the terms ``respiratory inlet covering,'' ``tight 
fitting,'' ``loose fitting,'' and ``warning device.''

Section 84.126 Canister Bench Tests; Minimum Requirements

    In this existing section in subpart I--Gas Masks, a new paragraph 
(f) specifies that PAPRs designed with one or more canisters and 
particulate filters must meet the end-of-service-life requirements both 
as received from the applicant and after being equilibrated at room 
temperature.

Section 84.207 Bench Tests; Gas and Vapor Tests; Minimum Requirements; 
General

    In this existing section in subpart L--Chemical Cartridge 
Respirators, a new paragraph (h) specifies that PAPRs designed with one 
or more canisters and particulate filters must meet the end-of-service-
life requirements both as received from the applicant and after being 
equilibrated at room temperature.

Subpart K--Air-Purifying Particulate Respirators

    Subpart K is retitled from ``Non-Powered Air-Purifying Particulate 
Respirators'' to ``Air-Purifying Particulate Respirators.'' The intent 
of the new title is to properly indicate the broadened scope of the 
subpart, which includes the requirements for both non-powered and 
powered air-purifying particulate respirators.

Section 84.170 Air-Purifying Particulate Respirators; Description

    This section provides a general description of air-purifying 
particulate respirators as a class of respirator. It is intended to 
inform the public and to serve as a legal and practical definition for 
the purposes of the NIOSH respirator approval program.
    Paragraphs (a)(1), (2), and (3), which describe non-powered 
devices, remain substantively unchanged from the existing language. New 
paragraphs (b)(1), (2), and (3) describe PAPRs. Specifically, paragraph 
(b)(1) provides a general description of PAPRs and paragraph (b)(2) 
indicates that PAPRs are classified into one of two PAPR classes, HE or 
PAPR100, and one of three filter series, ``HE,'' ``PAPR100-N,'' and 
``PAPR100-P.'' Paragraph (b)(3) establishes that the minimum efficiency 
level for filters employed as part of powered respirator configurations 
is 99.97 percent for all three filter series, HE (high-efficiency), 
PAPR100-N, or PAPR100-P.
    Requirements for two series of filters have been established for 
the PAPR100 class to give manufacturers greater flexibility in 
designing these devices. The PAPR100-P series filter requirements are 
established to provide a filter that, like the existing PAPR class HE 
(high-efficiency series) filter, is suitable for use against all 
aerosols, including those which are comprised of oils.
    The PAPR100-N series filter, which is not intended to be used 
against oil-based aerosols, has also been added to allow for greater 
use of electrostatic filter media. New filter efficiency requirements 
in Sec.  84.180 are intended to allow manufacturers to optimize 
PAPR100-N series filters for environments with very low concentrations 
of non-oil based (solid- or water-based) aerosols where disposal of the 
filter after each use is preferred over extended use. The minimum 
filtration efficiency for the two new series of PAPR filters is 
maintained at 99.97 percent, the minimum filtration efficiency of the 
existing and ongoing HE series filters.

Section 84.171 Required Components and Attributes

    The title of this existing section is revised to describe the 
requirements for components and attributes that apply to both powered 
and non-powered air-purifying particulate respirators. The regulatory 
language itself is revised to replace terminology such as ``facepiece, 
mouthpiece with nose clip, hood, or helmet'' with ``respiratory inlet 
covering''; ``half-mask facepieces and full facepieces'' with ``tight-
fitting respiratory inlet coverings''; and ``hoods and helmets'' with 
``loose-fitting respiratory inlet coverings.'' The entire section is 
revised to not only include a list of the required components, but to 
include the required design attributes of those components.
    Paragraph (a) specifies the required attributes for the respiratory 
inlet covering, currently described in Sec. Sec.  84.175 and 84.1135.
    Paragraph (b)(1) addresses the filter unit, currently described in 
Sec.  84.179 for non-powered devices; paragraph (b)(2) includes new 
provisions specifying that powered devices must be labeled as series HE 
(high-efficiency) or series PAPR100-N or -P.
    Paragraph (c) addresses valves, currently described in Sec. Sec.  
84.177 and 84.1137.
    Paragraph (d) addresses the head harness, currently described in 
Sec. Sec.  84.178 and 84.1138.
    Paragraph (e) addresses the breathing tube, currently described in 
Sec. Sec.  84.172 and 84.1132.
    Paragraph (f) is new, and describes requirements for a drink tube, 
should the design require a drink tube.
    Paragraph (g) addresses the container, currently described in 
Sec. Sec.  84.174 and 84.1134.
    Paragraph (h) addresses the harness, currently described in 
Sec. Sec.  84.173 and 84.1133.
    Paragraph (i) is moved from Sec.  84.1156(f) to describe the 
airflow rate required of PAPR HE class and PAPR100 class tight-fitting 
and loose-fitting respiratory inlet coverings.
    Finally, a new paragraph (j) requires a low-flow warning device for 
the new PAPR100 class respirators only. There are no requirements for 
PAPR warning devices in 42 CFR part 84 for class HE respirators. 
However, if any PAPR system is submitted for approval equipped with a 
warning device, NIOSH verifies that the warning functions

[[Page 20604]]

properly as per the manufacturer's user instructions. In accordance 
with this paragraph, the required PAPR100 warning must alert users to 
breathing air flow that falls below 115 liters per minute for tight-
fitting facepieces or 170 liters per minute for loose-fitting hoods and 
helmets (the minimum required in Sec.  84.175). Warning devices must 
also be able to be heard or otherwise detected by the wearer and must 
also be readily distinguishable from one another. For example, if an 
optional low-battery warning is included in addition to the low-flow 
warning, it needs to be distinguishable from the required low-flow 
warning. The PAPR100 warning system must also not de-energize while the 
unit's blower is energized (i.e., power to the warning system must be 
prioritized), and must not switch off automatically or be able to be 
switched off manually. The warning should remain active until the 
reason for the warning is corrected.

Section 84.172 Airflow Resistance Test

    This section specifies the test criteria and acceptable performance 
criteria for inhalation and exhalation resistance of a complete air-
purifying particulate respirator. The requirements for non-powered air-
purifying particulate respirators are currently specified in Sec.  
84.180 and would be consolidated in Sec.  84.172 with requirements for 
PAPRs, unchanged. The existing requirements for PAPR class HE are moved 
from Sec.  84.1156(a)(1) and (2) and combined into Sec.  84.172, where 
the maximum airflow resistance standard for the new class PAPR100 would 
also be established.
    Paragraph (a) addresses the inhalation and exhalation resistance of 
the complete air-purifying particulate respirator. This paragraph is 
essentially unchanged in meaning but updated from the existing language 
in Sec.  84.180(a) to reflect industry standard terminology, replacing 
``facepiece, mouthpiece, hood, or helmet'' with ``respiratory inlet 
covering.''
    Paragraph (b) indicates that the airflow resistance of tight-
fitting PAPRs is measured with the blower off if the model is designed 
not to be immediately doffed in the event of a blower failure.
    Paragraph (c) maintains the current requirements in Sec.  
84.1157(a) for the maximum inhalation and exhalation resistances of 
complete PAPRs (both classes HE and PAPR100) and the current 
requirements in Sec.  84.180(b) for non-powered air-purifying 
respirators.

Section 84.173 Exhalation Valve Leakage Test

    This section contains the existing requirements in Sec. Sec.  
84.182 and 84.1150 that describe the NIOSH tests for exhalation valve 
leakage. The exhalation valve leakage testing is conducted on both non-
powered and powered devices.

Section 84.174 Filter Efficiency Level Determination Test--Non-Powered 
Series N, R, and P Filtration

    Text from existing section Sec.  84.181 specifies the test criteria 
and acceptable performance criteria for non-powered air-purifying 
particulate filter efficiency levels; it is re-numbered Sec.  84.173. 
This section is also re-named to clarify the content and indicate its 
application for all types of air-purifying particulate respirators. The 
word ``shall'' is replaced with ``will'' throughout the section, to 
clarify intent and reflect plain language principles. No substantive 
changes are made to the testing requirements and technical standards 
for filter efficiency for non-powered devices.

Section 84.175 Instantaneous Filter Efficiency Level Determination 
Test--PAPR Series HE, PAPR100-N, and PAPR100-P Filtration

    This new section describes the NIOSH filter efficiency testing 
requirements for both classes of PAPR and all three particulate series 
filters, HE, PAPR100-N, and PAPR100-P. This instantaneous dioctyl 
phthalate (DOP) test is unchanged from the current Sec.  84.1151. PAPRs 
are tested at the minimum required flow rates specified in Sec.  
84.1156(c)(2).
    Paragraph (a) indicates that three filters from each powered air-
purifying particulate respirator will have their filtration efficiency 
evaluated using DOP.
    Paragraph (b) describes the current atmospheric concentration of 
DOP. The test concentration, 100 milligrams per cubic meter, is 
unchanged. Paragraph (b) also includes the airflow rates for tight- and 
loose-fitting respiratory inlet coverings currently found in Sec.  
84.1156(c)(2).
    Paragraph (c) indicates that PAPRs designed with multiple filters 
will be tested by dividing the specified flow rate by the total number 
of filters.
    Finally, paragraph (d) requires the filters, including holders and 
gaskets, when separable, to be tested while mounted on a test fixture 
in the manner as used on the respirator. This allows NIOSH to test the 
assembly in a configuration as it will actually be used.

Section 84.176 Fit Test--PAPR Classes HE and PAPR100

    This section specifies the test criteria and acceptable performance 
criteria to fit test a complete PAPR. Two options are available to 
assess fit: Isoamyl acetate (IAA) or generated aerosol.
    Paragraph (a) specifies the existing IAA tightness test, originally 
established in subpart KK, Sec.  84.1156(a)(5). The IAA testing 
standard is unchanged.
    Paragraph (b) describes a new generated aerosol (corn oil) test, 
intended as an alternative to the IAA method for those powered devices 
that are equipped solely with particulate filters. The corn oil 
quantitative fit test was developed by NIOSH, at the behest of 
respirator manufacturers, and has been used as a voluntary substitute 
test in place of the qualitative IAA test for series HE PAPRs since 
approximately 2008. This test utilizes a concentration of 20-40 
milligrams per cubic meter of corn oil aerosol with a mass median 
aerodynamic diameter of 0.4 to 0.6 micrometers. Paragraph (b)(1) 
describes the work schedule performed by the wearer during the test. 
The activities that are specified in this paragraph--nodding and 
turning head, calisthenic arm movements, running in place, and pumping 
a tire pump--are used by the agency to test the facepiece fit of 
respirator types by simulating the types of activities workers might 
perform while wearing the respirator.
    Paragraph (b)(2) allows NIOSH to verify that the facepiece is 
capable of adjustment and that the applicant's donning instructions 
should be followed. Paragraph (b)(3) requires that the appropriate fit 
factors for the applicant respirator be exceeded.

Section 84.177 Total Noise Level Test--PAPR Classes HE and PAPR100

    This section replicates the testing standard for PAPR noise levels 
currently found in Sec.  84.1139. The standard requires that the noise 
levels generated by any PAPR (i.e., HE hood or helmet and any PAPR100) 
must not exceed 80 decibels using the A-weighting frequency response 
(dBA) measured at each ear location while the system operates at its 
maximum airflow obtainable. Today, PAPR designs include head-, neck-, 
and face-mounted blowers in closer proximity to the user's ears. 
Additionally, for class HE hood and helmet designs, the provision is 
revised to clarify that the noise level measurement will be taken at 
the entrance to the ear rather than ``inside the hood or helmet'' as 
the standard currently states.

[[Page 20605]]

Section 84.178 Breath Response Type, Airflow Resistance Test--PAPR 
Classes HE and PAPR100

    This new section specifies the minimum test criteria for a breath-
responsive PAPR. Breath-responsive PAPRs are designed to maintain a 
positive pressure in the facepiece to match the user's respiratory 
requirements. Current PAPR requirements in 42 CFR part 84 do not 
address these design features. Therefore, pursuant to 42 CFR 84.60 and 
84.63, these types of PAPRs have been evaluated using the requirements 
of 42 CFR 84.157, which are applicable to certain types of atmosphere-
supplying respirators.
    This section specifies that the breath-responsive PAPR airflow will 
be measured with a breathing machine described in Sec.  84.88(b) and 
(c). Paragraph (a) specifies that the minimum inhalation resistance 
shall be greater than zero. Paragraph (b) specifies that the maximum 
exhalation resistance must be less than 89 millimeters (3.5 inches) of 
water-column height, in accordance with current requirements in Sec.  
84.91(c) and (d).

Section 84.179 Silica Dust Loading Test--PAPR Series HE Filtration

    This section contains the requirements from existing Sec. Sec.  
84.1144 and 84.1152, which are themselves removed from part 84 in this 
action. This section specifies the test criteria for the silica dust 
loading test of a complete powered PAPR series HE. This test procedure 
is not used to test PAPR100-N or -P series devices, which NIOSH expects 
will allow PAPR100 designs to be smaller and lighter than series HE 
devices. Paragraphs (a) and (f), respectively, specify the test period 
and flowrate as well as the amount of unretained test suspension; these 
testing standards are taken from Sec.  84.1152. Paragraphs (b), (c), 
(d), and (e) establish the test chamber conditions and size and 
concentration of the test particulate.

Section 84.180 Particulate Loading Test--PAPR Series PAPR100-N and 
PAPR100-P Filtration

    This new section adopts the existing particulate loading test for 
non-powered air-purifying respirators in Sec.  84.181, applying it to 
both PAPR100 series filters. Paragraph (a) specifies that NIOSH will 
test the efficiency of 20 filters of each powered air-purifying 
particulate respirator model submitted for a class PAPR100 approval.
    Paragraph (a)(1) specifies that NIOSH will use a sodium chloride 
aerosol when testing PAPR100-N series filters. Paragraph (a)(2) 
specifies that NIOSH will use a dioctyl phthalate or equivalent aerosol 
when testing PAPR100-P series filters.
    Paragraph (b) requires that 20 PAPR100-N series filters be 
preconditioned with humid air prior to being subjected to the 
filtration efficiency loading test specified in paragraph (d)(1).
    Paragraph (c) specifies the continuous test aerosol flow rates for 
the filter efficiency testing. Single filters are to be tested at a 
rate of 85  4 liters per minute; filters used in pairs at a 
rate of 42.5  2 liters per minute through each filter; and 
filters used in threes at a rate of 28.3  1 liters per 
minute through each filter.
    Paragraph (d)(1) specifies the filter efficiency test aerosol for 
series PAPR100-N, sodium chloride or an equivalent solid aerosol. The 
test conditions for the solid aerosol are specified to be at 25  5 degrees Celsius. The sodium chloride aerosol specified to be 
used in these tests is to be neutralized to the Boltzmann equilibrium 
state, and the maximum concentration will not exceed 200 milligrams per 
cubic meter. This paragraph also specifies the particle size, and size 
distribution of the sodium chloride test aerosol at a count median 
diameter of 0.075  0.020 micrometer and a standard 
geometric deviation not exceeding 1.86 at the specified test conditions 
as determined with a scanning mobility particle sizer or equivalent.
    Paragraph (d)(2) specifies the filter efficiency test aerosol for 
series PAPR100-P, DOP or an equivalent oil liquid particulate aerosol. 
The test conditions for the liquid aerosol are specified to be at 25 
 5 degrees Celsius. The DOP aerosol specified to be used in 
these tests is to be neutralized to the Boltzmann equilibrium state, 
and the maximum concentration will not exceed 200 milligrams per cubic 
meter. This paragraph also specifies the particle size, and sized 
distribution of the DOP test aerosol at a count median diameter of 
0.185  0.020 micrometer and a standard geometric deviation 
not exceeding 1.60 at the specified test conditions as determined with 
a scanning mobility particle sizer or equivalent.
    Paragraph (e) specifies that both the solid and the liquid aerosol 
filtration efficiency test must continue until minimum efficiency is 
achieved or until an aerosol mass of 200  5 milligrams has 
contacted the filter. This paragraph further specifies that for 
PAPR100-P series filters, if the filter efficiency is decreasing when 
the 200  5 mg challenge point is reached, the test shall be 
continued until there is no further decrease in efficiency.
    Paragraph (f) requires the efficiency of the filter (i.e., the 
amount of aerosol particles that are removed by the filter) to be 
monitored and recorded throughout the test period by a suitable 
forward-light-scattering photometer or equivalent instrumentation.
    Paragraph (g) requires the minimum filter efficiency for each of 
the 20 filters to be determined and recorded. The minimum efficiency of 
each tested filter must be greater than or equal to 99.97 percent for 
both PAPR100-N and PAPR100-P series filters.

Section 84.181 Communication Performance Test--PAPR Class PAPR100

    This new section specifies testing criteria for PAPR communication 
performance. The 2014 IOM workshop highlighted the limitations posed by 
PAPRs with regard to communication with patients, potentially 
compromising patient safety. This test is intended to address 
healthcare, first responders, and other workers' needs for PAPR100s 
designed and tested to ensure a PAPR's ability to meet a minimum 
communication performance level of speech conveyance and 
intelligibility.
    Paragraph (a) requires that PAPR100s are designed to allow minimum 
communication while being worn.
    Paragraph (b) specifies that the Modified Rhyme Test (MRT) will be 
used to conduct the test. The MRT consists of lists of 50 monosyllabic, 
phonetically-balanced words and evaluates a listener's ability to 
comprehend single words spoken by the respirator wearer.
    Paragraph (c) specifies that for each MRT trial the overall 
performance rating is calculated. The performance rating is the ratio 
of the number of correct responses to the number of incorrect responses 
with and without a respirator being worn. To obtain a passing score, 
the PAPR100 must obtain an average overall performance rating greater 
than or equal to 70 percent.

VI. Regulatory Assessment Requirements

A. Executive Order 12866 (Regulatory Planning and Review) and Executive 
Order 13563 (Improving Regulation and Regulatory Review)

    Executive Orders 12866 and 13563 direct agencies to assess all 
costs and benefits of available regulatory alternatives and, if 
regulation is necessary, to select regulatory approaches that maximize 
net benefits

[[Page 20606]]

(including potential economic, environmental, public health and safety 
effects, distributive impacts, and equity). E.O. 13563 emphasizes the 
importance of quantifying both costs and benefits, of reducing costs, 
of harmonizing rules, and of promoting flexibility.
    This interim final rule has been determined to be a ``significant 
regulatory action'' under section 3(f) of E.O. 12866. The rulemaking is 
considered a deregulatory action because it removes a barrier to the 
manufacturing, labeling as NIOSH-approved, and selling of new PAPR 
designs intended for healthcare and other workplace settings. With the 
promulgation of the interim final requirements, manufacturers have a 
choice to submit approval applications under either the existing PAPR 
class HE standard or the new class PAPR100 standard.
    The new PAPR100 respirators are required to meet most of the 
requirements and testing standards applied to class HE respirators 
except for the silica dust loading test in Sec.  84.179, which requires 
that the device perform for a minimum service time of 4 hours. Three 
new requirements--a low-flow warning device (Sec.  84.171(j)), 
particulate loading test (Sec.  84.180), and communication performance 
testing (Sec.  84.181)--apply to class PAPR100 respirators only. HHS 
requests data that would facilitate quantification of: (a) The 
incremental cost savings resulting from the removal of the silica dust 
loading test requirements, and (b) the incremental costs resulting from 
each of the three new requirements.
    This rule does not impose any mandatory costs on the public and 
benefits manufacturers who choose to develop a product under these new 
technical requirements. Healthcare facilities that currently utilize 
PAPR class HE devices that are designed for industrial use may also see 
a cost saving because class PAPR100 respirators designed for healthcare 
or other workplace settings may be more affordable than the current 
devices. In discussions with NIOSH, manufacturers have indicated that 
the cost of future class PAPR100 respirators is likely to be 
substantially less than the current cost of class HE devices. HHS 
requests data that would facilitate estimation of: (a) The increase in 
PAPR device availability resulting from this likely cost reduction, and 
(b) the timing of such availability relative to the issuance of this 
interim final rule.
    HHS also requests data or other comment relevant to the benefits of 
this rulemaking--including, but not limited to, quantitative evidence 
on the duration of worker exposure to the hazards that class PAPR100 
devices and other respirators protect against.

B. Regulatory Flexibility Act

    The Regulatory Flexibility Act (RFA) does not apply to a rulemaking 
when a general notice of proposed rulemaking is not required. 5 U.S.C. 
603 and 604. As noted previously, the Agencies have determined for good 
cause that it is impracticable and contrary to the public interest to 
publish a general notice of proposed rulemaking for this joint final 
rule. Accordingly, the RFA's requirements relating to an initial and 
final regulatory flexibility analysis do not apply.

C. Paperwork Reduction Act

    The Paperwork Reduction Act (PRA), 44 U.S.C. 3501 et seq., requires 
an agency to invite public comment on, and to obtain OMB approval of, 
any regulation that requires 10 or more people to report information to 
the agency or to keep certain records. The Office of Management and 
Budget (OMB) has already approved the information collection and 
recordkeeping requirements for certification and approval of 
respiratory protective devices under OMB Control Number 0920-0109, 
Information Collection Provisions in 42 CFR part 84--Tests and 
Requirements for Certification and Approval of Respiratory Protective 
Devices (expiration date April 30, 2021). Due to this interim final 
rule, which would allow for the NIOSH approval of respirators in a new 
class, PAPR100, there is likely to be a change in burden in the 
approved collection of information.
    Based on PAPR activity over the last several years and also the 
increased number of related inquiries in response to the COVID-19 
pandemic, NIOSH estimates that up to 5 respirator manufacturers may 
submit approximately 23 applications for PAPR100 approvals to the 
National Personal Protective Technology Laboratory from April 2020 
through April 2021. Each application is expected to require an average 
of 229 hours to complete and maintain.
    Accordingly, NIOSH expects 5,267 burden hours to be attributed to 
applications for PAPR100 approvals. NIOSH estimates an hourly wage rate 
of $79.89 (wage data is the average unspecified manufacturing industry 
engineer wage of $45.68 as reported in the 2016 National Sector NAICS 
Industry-Specific estimates multiplied by 1.06 inflation adjustment and 
1.65 factor for overhead expenses).

----------------------------------------------------------------------------------------------------------------
                                                                      Average     Average burden
            Section                  TitleC          Number of     responses per   per response    Total burden
                                                    respondents     respondent         (hr)            (hr)
----------------------------------------------------------------------------------------------------------------
Sec.   84.170.................  Air-purifying                  5             4.6             229           5,267
                                 particulate
                                 respirators;
                                 description.
----------------------------------------------------------------------------------------------------------------


----------------------------------------------------------------------------------------------------------------
                                                                   Total burden      Estimated
              Section                           Title               hours (from     hourly wage    Total cost of
                                                                      above)           rate         hour burden
----------------------------------------------------------------------------------------------------------------
Sec.   84.170.....................  Air-purifying particulate              5,267           79.89        $420,780
                                     respirators; description.
----------------------------------------------------------------------------------------------------------------

    The agency will submit the adjustment in burden for OMB Control No. 
0920-0109 to OMB for its emergency review and approval.

D. Congressional Review Act

    As required by Congress under the Congressional Review Act (5 
U.S.C. 801 et seq.), HHS will report the promulgation of this rule to 
Congress prior to its effective date. This rule is not likely to result 
in an annual effect on the economy of $100,000,000 or more; a major 
increase in costs or prices for consumers, individual industries, 
Federal, State, or local government agencies, or geographic regions; or 
significant adverse effects on competition, employment, investment, 
productivity, innovation, or on the ability of U.S.-based enterprises 
to compete with foreign-based enterprises

[[Page 20607]]

in domestic and export markets. Pursuant to the Congressional Review 
Act (5 U.S.C. 801 et seq.), the Office of Information and Regulatory 
Affairs designated this rule as not a ``major rule,'' as defined by 5 
U.S.C. 804(2).

E. Unfunded Mandates Reform Act of 1995

    Title II of the Unfunded Mandates Reform Act of 1995 (2 U.S.C. 1531 
et seq.) directs agencies to assess the effects of Federal regulatory 
actions on State, local, and Tribal governments, and the private sector 
``other than to the extent that such regulations incorporate 
requirements specifically set forth in law.'' For purposes of the 
Unfunded Mandates Reform Act, this interim final rule does not include 
any Federal mandate that may result in increased annual expenditures in 
excess of $100 million by State, local, or Tribal governments in the 
aggregate, or by the private sector.

F. Executive Order 12988 (Civil Justice Reform)

    This interim final rule has been drafted and reviewed in accordance 
with Executive Order 12988 and will not unduly burden the Federal court 
system. This rule has been reviewed carefully to eliminate drafting 
errors and ambiguities.

G. Executive Order 13132 (Federalism)

    HHS has reviewed this interim final rule in accordance with 
Executive Order 13132 regarding federalism, and has determined that it 
does not have ``federalism implications.'' The rule does not ``have 
substantial direct effects on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.''

H. Executive Order 13045 (Protection of Children From Environmental 
Health Risks and Safety Risks)

    In accordance with Executive Order 13045, HHS has evaluated the 
environmental health and safety effects of this interim final rule on 
children. HHS has determined that the rule would have no environmental 
health and safety effect on children.

I. Executive Order 13211 (Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use)

    In accordance with Executive Order 13211, HHS has evaluated the 
effects of this interim final rule on energy supply, distribution or 
use, and has determined that the rule will not have a significant 
adverse effect.

J. Plain Writing Act of 2010

    Under Public Law 111-274 (October 13, 2010), executive Departments 
and Agencies are required to use plain language in documents that 
explain to the public how to comply with a requirement the Federal 
government administers or enforces. HHS has attempted to use plain 
language in promulgating the interim final rule consistent with the 
Federal Plain Writing Act guidelines but notes that these standards are 
technical in nature.

List of Subjects in 42 CFR Part 84

    Mine safety and health, Occupational safety and health, Personal 
protective equipment, Respirators.

Final Rule

    For the reasons discussed in the preamble, the Department of Health 
and Human Services amends 42 CFR part 84 as follows:

PART 84--APPROVAL OF RESPIRATORY PROTECTIVE DEVICES

0
 1. The authority citation for part 84 continues to read as follows:

    Authority:  29 U.S.C. 651 et seq.; 30 U.S.C. 3, 5, 7, 811, 
842(h), 844.

Subpart A--General Provisions

0
 2. Amend Sec.  84.2 by adding definitions for ``Loose fitting'', 
``Respiratory inlet covering'', ``Tight fitting'', and ``Warning 
device'' in alphabetical order to read as follows:


Sec.  84.2  Definitions.

* * * * *
    Loose fitting means respiratory inlet covering that covers the 
wearer's head and neck, or head, neck, and shoulders, or whole body 
(when integral to the design).
* * * * *
    Respiratory inlet covering means that portion of a respirator that 
forms the protective barrier between the user's respiratory tract and 
an air-purifying device or breathing air source, or both.
* * * * *
    Tight fitting means a respiratory inlet covering that forms a 
complete gas tight or dust tight seal with the face or neck.
* * * * *
    Warning device is a component of a respiratory protective device 
that informs the wearer to take some action.

Subpart G--General Construction and Performance Requirements


Sec.  84.60  [Amended]

0
 3. Amend Sec.  84.60, in paragraph (a), by removing the words 
``subparts H through KK'' and adding in their place the words 
``subparts H through O''.


Sec.  84.63  [Amended]

0
 4. Amend Sec.  84.63, paragraphs (a) through (c) by removing the words 
``subparts H through KK'' and adding in their place the words 
``subparts H through O''.


Sec.  84.64  [Amended]

0
 5. Amend Sec.  84.64, in paragraph (b), by removing the words 
``subparts H through KK'' and adding in their place the words 
``subparts H through O''.


Sec.  84.65  [Amended]

0
 6. Amend Sec.  84.65, in paragraph (a), by removing the words 
``subparts H through KK'' and adding in their place the words 
``subparts H through O''.

Subpart I--Gas Masks


Sec.  84.125  [Amended]

0
7. Amend Sec.  84.125 by removing the words ``Sec. Sec.  84.170 through 
84.183, except for the airflow resistance test of Sec.  84.181'' and 
adding in their place the words ``Sec. Sec.  84.170 through 84.181, 
except for the airflow resistance test of Sec.  84.172''.

0
 8. Amend Sec.  84.126 by adding paragraph (f) to read as follows:


Sec.  84.126  Canister bench tests; minimum requirements.

* * * * *
    (f) Powered air-purifying respirators with a canister(s) and 
particulate filter(s) must meet the as-received minimum service-life 
requirements and half of the equilibrated minimum service-life 
requirements set forth in Tables 5, 6, and 7 of subpart I using the 
flows specified in subpart K, Sec.  84.175(b) and equilibrated in 
accordance with paragraphs (a) through (e) of this section using the 
flows specified in subpart K, Sec.  84.175(b).

Subpart L--Chemical Cartridge Respirators


Sec.  84.206  [Amended]

0
 9. Amend Sec.  84.206, in paragraph (b), by removing the words 
``Sec. Sec.  84.179 through 84.183'' and adding in their place the 
words ``Sec. Sec.  84.170 through 84.181''.

0
 10. Amend Sec.  84.207 by adding paragraph (h) to read as follows:

[[Page 20608]]

Sec.  84.207  Bench tests; gas and vapor tests; minimum requirements; 
general.

* * * * *
    (h) Powered air-purifying respirators with a cartridge(s) and 
particulate filter(s) must meet the as-received minimum service-life 
requirements and half of the equilibrated minimum service-life 
requirements set forth in table 11 of subpart L using the flows 
specified in subpart K, Sec.  84.175(b) and equilibrated in accordance 
with paragraphs (a) through (g) of this section using the flows 
specified in subpart K, Sec.  84.175(b).

0
 11. Subpart K is revised to read as follows:
Subpart K--Air-Purifying Particulate Respirators
Sec.
84.170 Air-purifying particulate respirators; description.
84.171 Required components and attributes.
84.172 Airflow resistance test.
84.173 Exhalation valve leakage test.
84.174 Filter efficiency level determination test--non-powered 
series N, R, and P filtration.
84.175 Instantaneous filter efficiency level determination test--
PAPR series HE, PAPR100-N, and PAPR100-P filtration.
84.176 Fit test--PAPR classes HE and PAPR100.
84.177 Total noise level test--PAPR classes HE and PAPR100.
84.178 Breath response type, airflow resistance test--PAPR classes 
HE and PAPR100.
84.179 Silica dust loading test--PAPR series HE filtration.
84.180 Particulate loading test--PAPR series PAPR100-N and PAPR100-P 
filtration.
84.181 Communication performance test--PAPR class PAPR100.

Subpart K--Air-Purifying Particulate Respirators


Sec.  84.170   Air-purifying particulate respirators; description.

    (a) Non-powered air-purifying particulate respirators (series N, R, 
and P). (1) Non-powered air-purifying particulate respirators utilize 
the wearer's negative inhalation pressure to draw the ambient air 
through the air-purifying filter elements (filters) to remove 
particulates from the ambient air. They are designed for use as 
respiratory protection against atmospheres with particulate 
contaminants at concentrations that are not immediately dangerous to 
life or health and that contain adequate oxygen to support life.
    (2) Non-powered air-purifying particulate respirators are 
classified into three series, N-, R-, and P-series. The N-series 
filters are restricted to use in those workplaces free of oil aerosols. 
The R- and P-series filters are intended for removal of any particulate 
that includes oil-based liquid particulates.
    (3) Non-powered air-purifying particulate respirators are 
classified according to the efficiency level of the filter(s) as tested 
according to the requirements of this part.
    (i) N100, R100, and P100 filters must demonstrate a minimum 
efficiency level of 99.97 percent.
    (ii) N99, R99, and P99 filters must demonstrate a minimum 
efficiency level of 99 percent.
    (iii) N95, R95, and P95 filters must demonstrate a minimum 
efficiency level of 95 percent.
    (b) Powered air-purifying particulate respirators (PAPR classes HE 
and PAPR100). (1) Powered air-purifying particulate respirators utilize 
a blower to move the ambient air through the air-purifying filter 
elements (filters) to remove particulate contaminants and deliver clean 
air to the respiratory inlet covering. They are designed for use as 
respiratory protection against atmospheres considered not immediately 
dangerous to life or health and that contain adequate oxygen to support 
life.
    (2) Powered air-purifying particulate respirators are classified 
into two classes, HE and PAPR100, and three series, HE, PAPR100-N, and 
PAPR100-P. The N-series filters are restricted to use in those 
workplaces free of oil aerosols. The P-series filters are intended for 
removal of any particulate that includes oil-based liquid particulates.
    (3) All three filter series, HE, PAPR100-N, and PAPR100-P, for 
powered air-purifying particulate respirators must demonstrate a 
minimum efficiency level of 99.97 percent.


Sec.  84.171   Required components and attributes.

    The components of each air-purifying particulate respirator must 
meet the minimum construction requirements set forth in subpart G of 
this part. Each air-purifying particulate respirator described in Sec.  
84.170 must, where its design requires, contain the following component 
parts:
    (a) Respiratory inlet covering. (1) Tight fitting respiratory inlet 
coverings must be designed and constructed to fit persons with various 
facial shapes and sizes either:
    (i) By providing more than one size; or
    (ii) By providing one size which will fit varying facial shapes and 
sizes.
    (2) Full facepieces must provide for optional use of corrective 
spectacles or lenses, which must not reduce the respiratory protective 
qualities of the respirator.
    (3) Loose fitting respiratory inlet coverings must be designed and 
constructed to fit persons with various head sizes, provide for the 
optional use of corrective spectacles or lenses, and insure against any 
restriction of movement by the wearer.
    (4) Mouthpieces must be equipped with noseclips which are securely 
attached to the mouthpiece or respirator and provide an airtight seal.
    (5) Respiratory inlet coverings that incorporate a lens or 
faceshield must be designed to prevent eyepiece fogging.
    (6) Half-mask facepieces must not interfere with the fit of common 
industrial safety spectacles, including corrective safety spectacles.
    (7) Respiratory inlet coverings must be designed and constructed to 
provide adequate vision which is not distorted by the eyepieces.
    (b) Filter unit. The respirator manufacturer, as part of the 
application for certification, must specify the filter series and the 
filter efficiency level (i.e., ``N95,'' ``R95,'' ``P95,'' ``N99,'' 
``R99,'' ``P99,'' ``N100,'' ``R100,'' ``P100,'' ``HE,'' ``PAPR100-N'' 
or ``PAPR100-P'') for which certification is being sought.
    (1) Filters for non-powered respirators (series N, R, and P) must 
be prominently labeled as follows:
    (i) N100 filters must be labeled ``N100 Particulate Filter (99.97% 
filter efficiency level)'' and must be a color other than magenta.
    (ii) R100 filters must be labeled ``R100 Particulate Filter (99.97% 
filter efficiency level)'' and must be a color other than magenta.
    (iii) P100 filters must be labeled ``P100 Particulate Filter 
(99.97% filter efficiency level)'' and must be color coded magenta.
    (iv) N99 filters must be labeled ``N99 Particulate Filter (99% 
filter efficiency level)'' and must be a color other than magenta.
    (v) R99 filters must be labeled ``R99 Particulate Filter (99% 
filter efficiency level)'' and must be a color other than magenta.
    (vi) P99 filters must be labeled ``P99 Particulate Filter (99% 
filter efficiency level)'' and must be a color other than magenta.
    (vii) N95 filters must be labeled as ``N95 Particulate Filter (95% 
filter efficiency level)'' and must be a color other than magenta.
    (viii) R95 filters must be labeled as ``R95 Particulate Filter (95% 
filter efficiency level)'' and must be a color other than magenta.
    (ix) P95 filters must be labeled as ``P95 Particulate Filter (95% 
filter

[[Page 20609]]

efficiency level)'' and must be a color other than magenta.
    (2) Filters for powered respirators (classes HE and PAPR100) must 
be prominently labeled as follows:
    (i) HE filters must be labeled as ``HE Particulate Filter (99.97% 
filter efficiency level)'' and must be color coded magenta.
    (ii) PAPR100-N filters must be labeled as ``PAPR100-N Particulate 
Filter (99.97% filter efficiency level)'' and must be color coded 
magenta.
    (iii) PAPR100-P filters must be labeled as ``PAPR100-P Particulate 
Filter (99.97% filter efficiency level)'' and must be color coded 
magenta.
    (c) Valves. (1) Inhalation and exhalation valves must be protected 
against distortion.
    (2) Inhalation valves must be designed and constructed and provided 
where necessary to prevent excessive exhaled air from adversely 
affecting filters, except where filters are specifically designed to 
resist moisture.
    (3) Exhalation valves must be:
    (i) Provided where necessary;
    (ii) Protected against damage and external influence; and
    (iii) Designed and constructed to prevent inward leakage of 
contaminated air.
    (d) Head harness. (1) All facepieces must be equipped with head 
harnesses designed and constructed to provide adequate tension during 
use and an even distribution of pressure over the entire area in 
contact with the face.
    (2) Facepiece head harnesses, except those employed on filtering 
facepiece respirators, must be adjustable and replaceable.
    (3) Mouthpieces must be equipped, where applicable, with adjustable 
and replaceable harnesses, designed and constructed to hold the 
mouthpiece in place.
    (e) Breathing tube. Flexible breathing tubes used in conjunction 
with respirators must be designed and constructed to prevent:
    (1) Restriction of free head movement;
    (2) Disturbance of the fit of facepieces, mouthpieces, or loose 
fitting respiratory-inlet covering;
    (3) Interference with the wearer's activities; and
    (4) Shutoff of airflow due to kinking, or from chin or arm 
pressure.
    (f) Drink tube. (1) For particulate respirators equipped with a 
drink tube, the respirator must meet all requirements of the standard 
with the drink tube in place.
    (2) Dry drinking tube assembly will be subjected to a suction of 75 
mm water column height while in a normal operating position (closed).
    (3) Leakage through the drinking tube assembly must not exceed 30 
mL per minute.
    (g) Container. (1) Except as provided in paragraph (b) of this 
section, each respirator must be equipped with a substantial, durable 
container bearing markings which show the applicant's name, the type of 
respirator it contains, and all appropriate approval labels.
    (2) Containers for respirators may provide for storage of more than 
one respirator; however, such containers must be designed and 
constructed to prevent contamination of respirators which are not 
removed, and to prevent damage to respirators during transit.
    (h) Harness. (1) Each respirator must, where necessary, be equipped 
with a suitable harness designed and constructed to hold the components 
of the respirator in position against the wearer's body.
    (2) Harnesses must be designed and constructed to permit easy 
removal and replacement of respirator parts, and, where applicable, 
provide for holding a full facepiece in the ready position when not in 
use.
    (i) Attached blower--PAPR classes HE and PAPR100. Blowers must be 
designed to achieve the air flow rates required by the testing 
standards in Sec.  84.175.
    (j) Low-flow warning device--PAPR class PAPR100. (1) The design 
must include a low-flow warning. It must actively and readily indicate 
when flow inside the respiratory inlet covering falls below the minimum 
air flow defined in Sec.  84.175.
    (2) Any warning must be detectable by the wearer without any 
intervention by the wearer.
    (3) Warning devices must be configured so that they may not be de-
energized while the blower is energized.
    (4) During use, warning devices must not switch off automatically 
and must not be capable of being switched off by the wearer.
    (5) Any warnings which require different reactions by the wearer 
must be distinguishable from one another.
    (6) If the warning provided is audible only, or other warnings are 
not readily apparent to the wearer, the minimum sound level must be 80 
dBA.


Sec.  84.172   Airflow resistance test.

    (a) Resistance to airflow will be measured in the tight-fitting 
respiratory inlet covering of a complete particulate respirator mounted 
on a test fixture with air flowing at continuous rate of 85 2 liters per minute, before each test conducted in accordance 
with Sec.  84.173.
    (b) Resistance of a complete tight-fitting powered air-purifying 
particulate respirator system will be measured with the blower off if 
the manufacturer indicates that the respirator should not be doffed in 
the event of a blower failure.
    (c) The maximum allowable resistance requirements for air-purifying 
particulate respirators are as follows:

                                               Maximum Resistance
                                            [mm water-column height]
----------------------------------------------------------------------------------------------------------------
                                                                            Inhalation
                         Respirator type                         --------------------------------   Exhalation
                                                                      Initial          Final
----------------------------------------------------------------------------------------------------------------
Non-Powered (N, R, and P).......................................              35             N/A              25
Powered (tight fitting) (HE class and PAPR100 class)............              50              70              20
----------------------------------------------------------------------------------------------------------------

Sec.  84.173   Exhalation valve leakage test.

    (a) Dry exhalation valves and valve seats will be subjected to a 
suction of 25 mm water-column height while in a normal operating 
position.
    (b) Leakage between the valve and valve seat must not exceed 30 mL 
per minute.


Sec.  84.174   Filter efficiency level determination test--non-powered 
series N, R, and P filtration.

    (a) Twenty filters of each non-powered air-purifying particulate 
respirator model will be tested for filter efficiency against:
    (1) A solid sodium chloride particulate aerosol as per this 
section, if N-series certification is requested by the applicant.
    (2) A dioctyl phthalate (DOP) or equivalent liquid particulate 
aerosol as per this section, if R-series or P-series

[[Page 20610]]

certification is requested by the applicant.
    (b) Filters including holders and gaskets, when separable, will be 
tested for filter efficiency level, as mounted on a test fixture in the 
manner as used on the respirator.
    (c) Prior to filter efficiency testing of 20 N-series filters, the 
20 to be tested will be taken out of their packaging and placed in an 
environment of 85  5 percent relative humidity at 38  2.5 [deg]C for 25 1 hours. Following the pre-
conditioning, filters will be sealed in a gas-tight container and 
tested within 10 hours.
    (d) When the filters do not have separable holders and gaskets, the 
exhalation valves will be blocked so as to ensure that leakage, if 
present, is not included in the filter efficiency level evaluation.
    (e) For non-powered air-purifying particulate respirators with a 
single filter, filters will be tested at a continuous airflow rate of 
85  4 liters per minute. Where filters are to be used in 
pairs, the test-aerosol airflow rate will be 42.5  2 liters 
per minute through each filter.
    (f) Filter efficiency test aerosols:
    (1) When testing N-series filters, a sodium chloride or equivalent 
solid aerosol at 25  5 [deg]C and relative humidity of 30 
 10 percent that has been neutralized to the Boltzmann 
equilibrium state will be used. Each filter will be challenged with a 
concentration not exceeding 200 mg/m\3\.
    (2) When testing R-series and P-series filters, a neat cold-
nebulized dioctyl phthalate (DOP) or equivalent aerosol at 25  5 [deg]C that has been neutralized to the Boltzmann equilibrium 
state will be used. Each filter will be challenged with a concentration 
not exceeding 200 mg/m\3\.
    (3) The test will continue until minimum efficiency is achieved or 
until an aerosol mass of at least 200  5 mg has contacted 
the filter. For P-series filters, if the filter efficiency is 
decreasing when the 200  5 mg challenge point is reached, 
the test will be continued until there is no further decrease in 
efficiency.
    (g) The sodium chloride test aerosol will have a particle size 
distribution with count median diameter of 0.075  0.020 
[mu]m and a standard geometric deviation not exceeding 1.86 at the 
specified test conditions as determined with a scanning mobility 
particle sizer or equivalent. The DOP aerosol will have a particle size 
distribution with count median diameter of 0.185  0.020 
[mu]m and a standard geometric deviation not exceeding 1.60 at the 
specified test conditions as determined with a scanning mobility 
particle sizer or equivalent.
    (h) The efficiency of the filter will be monitored and recorded 
throughout the test period by a suitable forward-light-scattering 
photometer or equivalent instrumentation.
    (i) The minimum efficiency for each of the 20 filters will be 
determined and recorded and must be equal to or greater than the filter 
efficiency criterion listed for each level as follows:

------------------------------------------------------------------------
                      Filter series                       Efficiency (%)
------------------------------------------------------------------------
P100, R100, N100........................................         >=99.97
P99, R99, N99...........................................            >=99
P95, R95, N95...........................................            >=95
------------------------------------------------------------------------

Sec.  84.175   Instantaneous filter efficiency level determination 
test--PAPR series HE, PAPR100-N, and PAPR100-P filtration.

    (a) Three filters from each powered air-purifying particulate 
respirator for efficiency will be tested against a neat cold-nebulized 
dioctyl phthalate (DOP) or equivalent aerosol at 25  5 
[deg]C that has been neutralized to the Boltzmann equilibrium state.
    (b) Single air-purifying particulate respirator filter units will 
be tested in an atmosphere concentration of 100 mg/m\3\ of DOP at the 
following continuous flow rates for a period of 5 to 10 seconds:

------------------------------------------------------------------------
                                                           Airflow rate
           Type of respiratory inlet covering               (liters per
                                                              minute)
------------------------------------------------------------------------
Tight-fitting...........................................             115
Loose-fitting...........................................             170
------------------------------------------------------------------------

    (c) Powered air-purifying particulate respirators with multiple 
filter units will be tested by dividing the flow rate specified in 
paragraph (b) of this section by the total number of filters used.
    (d) The filter will be mounted on a connector in the same manner as 
used on the respirator and the total efficiency must be >=99.97 
percent.


Sec.  84.176   Fit test--PAPR classes HE and PAPR100.

    NIOSH will assess powered air-purifying respirator fit using either 
isoamyl acetate or generated aerosol.
    (a) Isoamyl acetate (IAA) fit test. The applicant must provide a 
charcoal-filled canister or cartridge of a size and resistance similar 
to the filter unit with connectors which can be attached to the 
facepiece in the same manner as the filter unit.
    (1) The canister or cartridge will be used in place of the filter 
unit, and persons will each wear a modified half-mask facepiece for 8 
minutes in a test chamber containing 100 parts (by volume) of isoamyl 
acetate vapor per million parts of air.
    (i) The following work schedule will be performed by each wearer in 
the test chamber:
    (A) Two minutes nodding up and down, and turning head side to side; 
and
    (B) Two minutes calisthenic arm movements.
    (C) Two minutes running in place.
    (D) Two minutes pumping with tire pump.
    (ii) The facepiece must be capable of adjustment, according to the 
applicant's instructions, to each wearer's face, and the odor of 
isoamyl acetate must not be detectable by any wearer during the test.
    (2) Where the respirator is equipped with a full facepiece, hood, 
helmet, or mouthpiece, the canister or cartridge will be used in place 
of the filter unit, and persons will each wear the modified respiratory 
inlet covering for 8 minutes in a test chamber containing 500 parts (by 
volume) of isoamyl acetate vapor per million parts of air, performing 
the work schedule specified in paragraph (b)(2) of this section.
    (b) Generated aerosol fit test. The powered air-purifying 
particulate respirator system is tested in an atmosphere containing 20-
40 mg/m\3\ corn oil aerosol having a mass median aerodynamic diameter 
of 0.4 to 0.6 [mu]m.
    (1) The following activities will be performed by each wearer in 
the test chamber:
    (i) Two minutes, nodding and turning head;
    (ii) Two minutes, calisthenic arm movements;
    (iii) Two minutes, running in place; and
    (iv) Two minutes, pumping with a tire pump into a 28-liter (1 
ft\3\) container.
    (2) The respiratory inlet covering will be adjusted, according to 
the applicant's instructions, to each wearer's face.
    (3) The appropriate fit factor must be exceeded during the entire 
test.


Sec.  84.177   Total noise level test--PAPR classes HE and PAPR100.

    Noise levels generated by any powered air-purifying respirators 
that cover the ears (i.e., hood or helmet) will be measured at the 
entrance to each ear at maximum airflow obtainable and must not exceed 
80 dBA.


Sec.  84.178   Breath response type, airflow resistance test--PAPR 
classes HE and PAPR100.

    Resistance to airflow will be measured with a breathing machine as 
described in Sec.  84.88.
    (a) Minimum inhalation resistance must be greater than zero mm of 
water-column height.

[[Page 20611]]

    (b) Maximum exhalation resistance must be less than 89 mm of water-
column height.


Sec.  84.179   Silica dust loading test--PAPR series HE filtration.

    (a) Three powered air-purifying particulate respirators will be 
tested for a period of 4 hours each at a flowrate not less than 115 
liters per minute for tight-fitting facepieces, and not less than 170 
liters per minute for loose-fitting hoods and helmets.
    (b) The relative humidity in the test chamber will be 20-80 
percent, and the room temperature approximately 25 [deg]C.
    (c) The test suspension in the chamber will not be less than 50 nor 
more than 60 mg of flint (99 + percent free silica) per m\3\ of air.
    (d) The flint in suspension will be 99 + percent through a 270-mesh 
sieve.
    (e) The particle-size distribution of the test suspension will have 
a geometric mean of 0.4 to 0.6 [mu]m and the standard geometric 
deviation will not exceed 2.
    (f) The total amount of unretained test suspension in samples taken 
during testing must not exceed 14.4 mg for a powered air-purifying 
particulate respirator with tight-fitting facepiece, and 21.3 mg for a 
powered air-purifying particulate respirator with loose-fitting hood or 
helmet.


Sec.  84.180   Particulate loading test--PAPR series PAPR100-N and 
PAPR100-P filtration.

    (a) Twenty filters of each powered air-purifying particulate 
respirator design will be tested for filter efficiency against:
    (1) A solid sodium chloride particulate aerosol, in accordance with 
paragraph (d)(1) of this section, if series PAPR100-N approval is 
requested by the applicant.
    (2) A dioctyl phthalate or equivalent liquid particulate aerosol, 
in accordance with paragraph (d)(2) of this section, if series PAPR100-
P approval is requested by the applicant.
    (b) Prior to filter efficiency testing of 20 series PAPR100-N 
filters, the 20 to be tested will be taken out of their packaging and 
placed in an environment of 85 5 percent relative humidity 
at 38 2.5 [deg]C for 25 1 hours. Following the 
pre-conditioning, filters will be sealed in a gas-tight container and 
tested within 10 hours.
    (c) For powered air-purifying particulate respirators with a single 
filter, filters will be tested at a continuous airflow rate of 85 
4 liters per minute. Where filters are to be used in pairs, 
the test-aerosol airflow rate will be 42.5 2 liters per 
minute through each filter.
    (d) Filter efficiency test aerosols:
    (1) Series PAPR100-N filters:
    (i) A sodium chloride or equivalent solid aerosol at 25 5 [deg]C and relative humidity of 30 10 percent that 
has been neutralized to the Boltzmann equilibrium state will be used. 
Each filter will be challenged with a concentration not exceeding 200 
mg/m\3\.
    (ii) The sodium chloride test aerosol will have a particle size 
distribution with count median diameter of 0.075 0.020 
[mu]m and a standard geometric deviation not exceeding 1.86 at the 
specified test conditions as determined with a scanning mobility 
particle sizer or equivalent.
    (2) Series PAPR100-P filters:
    (i) A neat cold-nebulized dioctyl phthalate (DOP) or equivalent 
aerosol at 25  5 [deg]C that has been neutralized to the 
Boltzmann equilibrium state will be used. Each filter will be 
challenged with a concentration not exceeding 200 mg/m\3\.
    (ii) The DOP aerosol shall have a particle size distribution with 
count median diameter of 0.185 0.020 [mu]m and a standard 
geometric deviation not exceeding 1.60 at the specified test conditions 
as determined with a scanning mobility particle sizer or equivalent.
    (e) The test will continue until minimum efficiency is achieved or 
until an aerosol mass of at least 200 5 mg has contacted 
the filter. For PAPR100-P series filters, if the filter efficiency is 
decreasing when the 200 5 mg challenge point is reached, 
the test will be continued until there is no further decrease in 
efficiency.
    (f) The efficiency of the filter will be monitored and recorded 
throughout the test period by a suitable forward-light scattering 
photometer or equivalent instrumentation.
    (g) The minimum efficiency for each of the 20 filters will be 
determined and recorded and must be equal to or greater than the filter 
efficiency criterion for PAPR100-N and PAPR100-P, efficiency >=99.97 
percent, pursuant to Sec.  84.170(b).


Sec.  84.181   Communication performance test--PAPR class PAPR100.

    (a) Powered air-purifying respirators must be designed to allow for 
proper communication while worn.
    (b) A Modified Rhyme Test \7\ will be used to test the wearer's 
ability to communicate efficiently.
---------------------------------------------------------------------------

    \7\ The Modified Rhyme Test is used in speech intelligibility 
experiments. See https://www.nist.gov/ctl/pscr/modified-rhyme-test-audio-library.
---------------------------------------------------------------------------

    (c) The communications requirement is met if the overall 
performance rating is greater than or equal to 70 percent.

Subpart KK [Removed]

0
12. Subpart KK, consisting of Sec. Sec.  84.1100 through 84.1158 and 
the tables, is removed.

     Dated: April 7, 2020.
Eric D. Hargan,
Deputy Secretary, Department of Health and Human Services.
[FR Doc. 2020-07804 Filed 4-9-20; 4:15 pm]
 BILLING CODE 4150-18-P