80_FR_44529 80 FR 44386 - Traylor Bros., Inc., Application for Permanent Variance and Interim Order; Grant of Interim Order; Request for Comments

80 FR 44386 - Traylor Bros., Inc., Application for Permanent Variance and Interim Order; Grant of Interim Order; Request for Comments

DEPARTMENT OF LABOR
Occupational Safety and Health Administration

Federal Register Volume 80, Issue 143 (July 27, 2015)

Page Range44386-44398
FR Document2015-18319

In this notice, OSHA announces the application of Traylor Bros., Inc., for a permanent variance and interim order from the provisions of OSHA standards that regulate work in compressed-air environments at 29 CFR 1926.803 and presents the Agency's preliminary finding to grant the permanent variance. OSHA also announces its grant of an interim order in this notice. OSHA invites the public to submit comments on the variance application to assist the Agency in determining whether to grant the applicant a permanent variance based on the conditions specified in this application.

Federal Register, Volume 80 Issue 143 (Monday, July 27, 2015)
[Federal Register Volume 80, Number 143 (Monday, July 27, 2015)]
[Notices]
[Pages 44386-44398]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2015-18319]


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DEPARTMENT OF LABOR

Occupational Safety and Health Administration

[Docket No. OSHA-2012-0035]


Traylor Bros., Inc., Application for Permanent Variance and 
Interim Order; Grant of Interim Order; Request for Comments

AGENCY: Occupational Safety and Health Administration (OSHA), Labor.

ACTION: Notice.

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SUMMARY: In this notice, OSHA announces the application of Traylor 
Bros., Inc., for a permanent variance and interim order from the 
provisions of OSHA standards that regulate work in compressed-air 
environments at 29 CFR 1926.803 and presents the Agency's preliminary 
finding to grant the permanent variance. OSHA also announces its grant 
of an interim order in this notice. OSHA invites the public to submit 
comments on the variance application to assist the Agency in 
determining whether to grant the applicant a permanent variance based 
on the conditions specified in this application.

DATES: Submit comments, information, documents in response to this 
notice, and request for a hearing on or before August 26, 2015. The 
interim order specified by this notice becomes effective on July 27, 
2015, and shall remain in effect until the interim order is modified or 
revoked.

ADDRESSES: Submit comments by any of the following methods:
    1. Electronically: Submit comments and attachments electronically 
at http://www.regulations.gov, which is the Federal eRulemaking Portal. 
Follow the instructions online for making electronic submissions.
    2. Facsimile: If submissions, including attachments, are not longer 
than 10 pages, commenters may fax them to the OSHA Docket Office at 
(202) 693-1648.
    3. Regular or express mail, hand delivery, or messenger (courier) 
service: Submit comments, requests, and any attachments to the OSHA 
Docket Office, Docket No. OSHA-2012-0035, Technical Data Center, U.S. 
Department of Labor, 200 Constitution Avenue NW., Room N-2625, 
Washington, DC 20210; telephone: (202) 693-2350 (TDY number: (877) 889-
5627). Note that security procedures may result in significant delays 
in receiving comments and other written materials by regular mail. 
Contact the OSHA Docket Office for information about security 
procedures concerning delivery of materials by express mail, hand 
delivery, or messenger service. The hours of operation for the OSHA 
Docket Office are 8:15 a.m.-4:45 p.m., e.t.
    4. Instructions: All submissions must include the Agency name and 
the OSHA docket number (OSHA-2012-0035). OSHA places comments and other 
materials, including any personal information, in the public docket 
without revision, and these materials will be available online at 
http://www.regulations.gov. Therefore, the Agency cautions commenters 
about submitting statements they do not want made available to the 
public, or submitting comments that contain personal information 
(either about themselves or others) such as Social Security numbers, 
birth dates, and medical data.
    5. Docket: To read or download submissions or other material in the 
docket, go to http://www.regulations.gov or the OSHA Docket Office at 
the address above. All documents in the docket are listed in the http://www.regulations.gov index; however, some information (e.g., 
copyrighted material) is not publicly available to read or download 
through the Web site.\1\ All submissions, including copyrighted 
material, are available for inspection at the OSHA Docket Office. 
Contact the OSHA Docket Office for assistance in locating docket 
submissions.
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    \1\ Traylor indicated that the decompression tables it intends 
to use for decompression with trimix are proprietary. Therefore, 
these tables are not available in the docket.
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    6. Extension of Comment Period: Submit requests for an extension of 
the comment period on or before August 26, 2015 to the Office of 
Technical Programs and Coordination Activities, Variance Program, 
Directorate of Technical Support and Emergency Management, Occupational 
Safety and Health Administration, U.S. Department of Labor, 200 
Constitution Avenue NW., Room N-3655, Washington, DC 20210, or by fax 
to (202) 693-1644.

FOR FURTHER INFORMATION CONTACT: Information regarding this notice is 
available from the following sources:
    Press inquiries: Contact Mr. Frank Meilinger, Director, OSHA Office 
of Communications, U.S. Department of Labor, 200 Constitution Avenue 
NW., Room N-3647, Washington, DC 20210; telephone: (202) 693-1999; 
email: [email protected].
    General and technical information: Contact Mr. Kevin Robinson, 
Director, Office of Technical Programs and Coordination Activities, 
Directorate of Technical Support and Emergency Management, Occupational 
Safety and Health Administration, U.S. Department of Labor, 200 
Constitution Avenue NW., Room N-3655, Washington, DC 20210; telephone: 
(202) 693-2110; email: [email protected]. OSHA's Web page includes 
information about the Variance Program (see http://www.osha.gov/dts/otpca/variances/index.html).

SUPPLEMENTARY INFORMATION: 
    Copies of this Federal Register notice. Electronic copies of this 
Federal Register notice are available at http://www.regulations.gov. 
This Federal Register notice, as well as news releases and other 
relevant information, also are available at OSHA's Web page at http://www.osha.gov.
    Hearing Requests. According to 29 CFR 1905.15, hearing requests 
must include: (1) A short and plain statement detailing how the 
proposed variance would affect the requesting party; (2) a 
specification of any statement or representation in the variance 
application that the commenter denies, and a concise summary of the 
evidence adduced in support of each denial; and (3) any views or 
arguments on any issue of fact or law presented in the variance 
application.

I. Notice of Application

    On April 26, 2012, Traylor Bros., Inc., 835 N. Congress Ave., 
Evansville, IN 47715, and Traylor/Skanska/Jay Dee Joint Venture, Blue 
Plains Tunnel, 5000 Overlook SW., Washington, DC 20032, submitted under 
Section 6(d) of the Occupational Safety and Health Act of 1970 (``OSH 
Act''; 29 U.S.C. 655) and 29 CFR 1905.11 (``Variances and other relief 
under section 6(d)''), an application for a permanent variance from 
several provisions of the OSHA standard that regulates work in 
compressed air at 29 CFR 1926.803. OSHA is addressing this request as 
two separate applications: (1) Traylor Bros., Inc. (``Traylor'' or 
``the applicant'') request for a permanent variance for future 
tunneling projects; and (2) Traylor/Skanska/Jay Dee Joint Venture, Blue 
Plains Tunnel (``Traylor JV''). This notice only addresses the Traylor 
application for an interim order and permanent variance for future 
tunneling projects. This notice does not address

[[Page 44387]]

the Traylor JV application for the Blue Plains Tunnel Project, which 
OSHA granted on March 27, 2015 (80 FR 16440).
    Specifically, this notice addresses Traylor's application for a 
permanent variance and interim order, applicable to future tunneling 
projects, from the provisions of the standard that: (1) Prohibit 
compressed-air worker (CAW) exposure to pressures exceeding 50 pounds 
per square inch (p.s.i.) except in an emergency (29 CFR 
1926.803(e)(5)); \2\ (2) require the use of the decompression values 
specified in decompression tables in Appendix A of the compressed-air 
standard for construction (29 CFR 1926.803(f)(1)); and (3) require the 
use of automated operational controls and a special decompression 
chamber (29 CFR 1926.803(g)(1)(iii) and .803(g)(1)(xvii), 
respectively).
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    \2\ The decompression tables in Appendix A of subpart S express 
the maximum working pressures as pounds per square inch gauge 
(p.s.i.g.), with a maximum working pressure of 50 p.s.i.g. 
Therefore, throughout this notice, OSHA expresses the 50 p.s.i. 
value specified by Sec.  1926.803(e)(5) as 50 p.s.i.g., consistent 
with the terminology in Appendix A, Table 1 of subpart S.
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    The applicant is a contractor that works on complex tunnel projects 
using recently developed equipment and procedures for soft-ground 
tunneling. The applicant's workers engage in the construction of 
tunnels using advanced shielded mechanical excavation techniques in 
conjunction with an earth pressure balanced tunnel boring machine 
(EPBTBM).
    According to its application, Traylor is likely to be the sole 
contractor, as well as the general contractor in association with 
future Joint Venture partners for the construction of future tunnels at 
various sites throughout the nation. Traylor asserts that generally, it 
bores tunnels (i.e., Blue Plains, as well as future tunnels) below the 
water table through soft soils consisting of clay, silt, and sand.
    Traylor employs specially trained personnel for the construction of 
the tunnel, and states that this construction will use shielded 
mechanical-excavation techniques. Traylor asserts that its workers 
perform hyperbaric interventions at pressures greater than 50 p.s.i.g. 
in the excavation chamber of the EPBTBM; these interventions consist of 
conducting inspections and maintenance work on the cutter-head 
structure and cutting tools of the EPBTBM.
    Traylor asserts that innovations in tunnel excavation, specifically 
with EPBTBMs, have, in most cases, eliminated the need to pressurize 
the entire tunnel. This technology negates the requirement that all 
members of a tunnel-excavation crew work in compressed air while 
excavating the tunnel. These advances in technology modified 
substantially the methods used by the construction industry to excavate 
subaqueous tunnels compared to the caisson work regulated by the 
current OSHA compressed-air standard for construction at 29 CFR 
1926.803. Such advances reduce the number of workers exposed, and the 
total duration of exposure to hyperbaric pressure during tunnel 
construction.
    Using shielded mechanical-excavation techniques, in conjunction 
with precast concrete tunnel liners and backfill grout, EPBTBMs provide 
methods to achieve the face pressures required to maintain a stabilized 
tunnel face through various geologies, and isolate that pressure to the 
forward section (the working chamber) of the EPBTBM. Interventions in 
the working chamber (the pressurized portion of the EPBTBM) take place 
only after halting tunnel excavation and preparing the machine and crew 
for an intervention. Interventions occur to inspect or maintain the 
mechanical-excavation components located in the working chamber. 
Maintenance conducted in the working chamber includes changing 
replaceable cutting tools and disposable wear bars, and, in rare cases, 
repairing structural damage to the cutter head.
    In addition to innovations in tunnel-excavation methods, Traylor 
asserts that innovations in hyperbaric medicine and technology improve 
the safety of decompression from hyperbaric exposures. According to 
Traylor, the use of decompression protocols incorporating oxygen is 
more efficient, effective, and safer for tunnel workers than compliance 
with the decompression tables specified by the existing OSHA standard 
(29 CFR 1926, subpart S, Appendix A decompression tables). These 
hyperbaric exposures are made safe by advances in technology, a better 
understanding of hyperbaric medicine, and the development of a project-
specific Hyperbaric Operations Manual (HOM) that requires specialized 
medical support and hyperbaric supervision to provide assistance to a 
team of specially trained man lock attendants and hyperbaric workers or 
CAWs.
    OSHA initiated a technical review of the Traylor's variance 
application and developed a set of follow-up questions that it sent to 
Traylor on September 17, 2012 (Ex. OSHA-2012-0035-0003). On October 26, 
2012, Traylor submitted its response and a request for an interim order 
for the Blue Plains Tunnel Project, as well as future projects (Ex. 
OSHA-2012-0035-0013). In its response to OSHA's follow-up questions, 
Traylor indicated that the maximum pressure to which it is likely to 
expose workers during future project interventions is 75 p.s.i.g and 
may involve the use of trimix breathing gas (composed of a mixture of 
oxygen, nitrogen, and helium in varying concentrations used for 
breathing by divers and CAWs for compression and decompression when 
working at pressures exceeding 73 p.s.i.g.). Therefore, to work 
effectively on future projects, Traylor must perform hyperbaric 
interventions in compressed air at pressures higher than the maximum 
pressure specified by the existing OSHA standard, 29 CFR 
1926.803(e)(5), which states: ``No employee shall be subjected to 
pressure exceeding 50 p.s.i.g. except in emergency'' (see footnote 2).
    On July 11, 2013, OSHA granted Traylor JV a project-specific 
interim order for the completion of the Blue Plains Tunnel in order to 
permit the applicant to begin work while OSHA continued to consider its 
application for a permanent variance (for Traylor JV's completion of 
the Blue Plains Tunnel, as well as Traylor's future tunneling 
projects). On December 11, 2014, OSHA published a Federal Register 
notice announcing Traylor JV's application for permanent variance and 
interim order, grant of an interim order, and request for comments (79 
FR 73631). The comment period expired on January 12, 2015. OSHA did not 
receive any comments on the proposed variance. As noted above, on March 
27, 2015, OSHA published the Federal Register notice announcing the 
grant of a permanent variance to Traylor JV for completion of the Blue 
Plains Tunnel (80 FR 16440).
    During its consideration of the Blue Plains variance, OSHA 
continued its technical review of the Traylor's variance application 
focusing on the proposed use of trimix breathing gas (proposed for use 
in future tunneling projects at pressures exceeding 73 p.s.i.g.) and 
developed a second set of follow-up questions that it sent to Traylor 
on December 18, 2013 (Ex. OSHA-2012-0035-0002). On January 21, 2014, 
Traylor submitted its response (Ex. OSHA-2012-0035-0009). In its 
response to OSHA's follow-up questions, Traylor provided additional 
technical and scientific information concerning successful trimix use 
on tunneling projects throughout the United States, as well as in 
Europe and Asia. Additionally, Traylor reaffirmed that the maximum 
pressure to which it is likely to expose workers during interventions 
for future tunneling

[[Page 44388]]

projects is 75 p.s.i.g. and may involve the use of trimix breathing 
gas.
    In reviewing Traylor's application for future tunneling projects, 
OSHA focused on the following important considerations:

     Variances are granted only to specific employers that 
submitted a properly completed and executed variance application. 
Traylor has met this requirement (for the single employer 
application);
     This notice announces only Traylor's (single employer) 
application for a variance dealing with future projects. It does not 
address Traylor's future hyperbaric tunneling projects in 
association with unnamed joint venture partners;
     Proposed variance conditions require Traylor to submit 
for OSHA's review and approval a project-specific HOM at least one 
year prior to the start of work on any future project;
     The proposed variance conditions require the HOM to 
demonstrate that the EPBTBM to be used on the project is designed, 
fabricated, inspected, tested, marked, and stamped in accordance 
with the requirements of ASME PVHO-1.2012 (or most recent edition of 
Safety Standards for Pressure Vessels for Human Occupancy) for the 
TBM's hyperbaric chambers.
     This condition ensures that each proposed future 
tunneling project can be comprehensively reviewed on a case-by-case 
basis prior to OSHA granting its approval to Traylor to proceed with 
its new project;
     Traylor may not begin hyperbaric interventions at 
pressures exceeding 50 p.s.i.g. until OSHA completes its review of 
the project-specific HOM and determines that the safety and health 
instructions and measures it specifies would be appropriate, would 
comply with the conditions of the variance, would adequately protect 
the safety and health of CAWs, and so notifies the applicant; and
     Traylor will be required to submit new applications 
requesting modification of its single employer variance and approval 
of its project-specific HOM [with sufficient lead time (at least one 
year prior to start of work on any future project), to allow OSHA to 
complete the variance modification process], upon forming any future 
joint ventures.

    Further, on December 6, 2012, OSHA published a Federal Register 
notice (77 FR 72781) announcing a request for information (RFI) for its 
continuing regulatory reviews named standards improvement projects 
(SIPs). The Agency conducted similar regulatory reviews of its existing 
standards previously and issued this latest RFI to initiate another of 
these regulatory reviews, and naming this review the Standards 
Improvement Project--Phase IV (SIP-IV). The purpose of SIP-IV is to 
improve and streamline OSHA standards by removing or revising 
requirements that are confusing or outdated, or that duplicate, or are 
inconsistent with other standards. Additionally, the regulatory review 
also is designed to reduce regulatory burden while maintaining or 
enhancing employees' safety and health. SIP-IV will focus primarily on 
OSHA's construction standards.
    As part of SIP-IV, OSHA is considering updating the decompression 
tables in Appendix A (1926.803(f)(1)) (77 FR 72783). This proposed 
action would permit employers to use decompression procedures and 
updated decompression tables that take advantage of new hyperbaric 
technologies used widely in extreme hyperbaric exposures. If the 
planned SIP-IV revises Appendix A, Traylor (and similar tunneling 
contractors previously granted a variance) will still require 
hyperbaric tunneling variances to address portions of the standard not 
covered by SIP-IV (i.e., 29 CFR 1926.803(e)(5); .803(g)(1)(iii) and 
.803(g)(1)(xvii)).
    If SIP-IV is completed (including the update of the decompression 
tables in Appendix A (1926.803(f)(1)), OSHA will modify Traylor's 
(single employer) and similar variances granted to other employers to 
include the applicable SIP-IV provisions as appropriate.
    OSHA considered Traylor's application for a permanent variance and 
interim order for future tunneling projects. OSHA determined that 
Traylor proposed an alternative that will provide a workplace at least 
as safe and healthful as that provided by the standard.

II. The Variance Application

A. Background

    Traylor asserts that the advances in tunnel excavation technology 
described in Section I of this notice modified significantly the 
equipment and methods used by contractors to construct subaqueous 
tunnels, thereby making several provisions of OSHA's compressed-air 
standard for construction at 29 CFR 1926.803 inappropriate for this 
type of work. These advances reduce both the number of workers exposed, 
and the total duration of exposure to the hyperbaric conditions 
associated with tunnel construction.
    Using shielded mechanical-excavation techniques, in conjunction 
with pre-cast concrete tunnel liners and backfill grout, EPBTBMs 
provide methods to achieve the face pressures required to maintain a 
stabilized tunnel face, through various geologies, while isolating that 
pressure to the forward section (working or excavation chamber) of the 
EPBTBM.
    Interventions involving the working chamber (the pressurized 
chamber at the head of the EPBTBM) take place only after the applicant 
halts tunnel excavation and prepares the machine and crew for an 
intervention. Interventions occur to inspect or maintain the 
mechanical-excavation components located in the forward portion of the 
working chamber. Maintenance conducted in the forward portion of the 
working chamber includes changing replaceable cutting tools, disposable 
wear bars, and, in rare cases, repairs to the cutter head due to 
structural damage.
    In addition to innovations in tunnel-excavation methods, research 
conducted after OSHA published its compressed-air standard for 
construction in 1971, resulted in advances in hyperbaric medicine. In 
this regard, the applicant asserts that the use of decompression 
protocols incorporating oxygen and trimix is more efficient, effective, 
and safer for tunnel workers than compliance with the existing OSHA 
standard (29 CFR 1926, subpart S, Appendix A decompression tables). 
According to the applicant, contractors routinely and safely expose 
employees performing interventions in the working chamber of EPBTBMs to 
hyperbaric pressures up to 75 p.s.i.g., which is 50% higher than 
maximum pressure specified by the existing OSHA standard (see 29 CFR 
1926.803(e)(5)).
    The applicant contends that the alternative safety measures 
included in its application provide its workers with a place of 
employment that is at least as safe and healthful as they would obtain 
under the existing provisions of OSHA's compressed-air standard for 
construction. The applicant certifies that it provided employee 
representatives of affected workers with a copy of the variance 
application.\3\ The applicant also certifies that it notified its 
workers of the variance application by posting at prominent locations 
where it normally posts workplace notices, a summary of the application 
and information specifying where the workers can examine a copy of the 
application. In addition, the applicant informed its workers and their 
representatives of their rights to petition the Assistant Secretary of 
Labor for Occupational Safety and Health for a hearing on the variance 
application.
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    \3\ See the definition of ``Affected employee or worker'' in 
section III. D.
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B. Variance From Paragraph (e)(5) of 29 CFR 1926.803, Prohibition of 
Exposure to Pressure Greater Than 50 p.s.i.g. (see Footnote 1)

    The applicant states that it may perform hyperbaric interventions 
at

[[Page 44389]]

pressures greater than 50 p.s.i.g. in the working chamber of the 
EPBTBM; this pressure exceeds the pressure limit of 50 p.s.i.g. 
specified for nonemergency purposes by 29 CFR 1926.803(e)(5). The 
EPBTBM has twin man locks, with each man lock having two compartments. 
This configuration allows workers to access the man locks for 
compression and decompression, and medical personnel to access the man 
locks if required in an emergency.
    EPBTBMs are capable of maintaining pressure at the tunnel face, and 
stabilizing existing geological conditions, through the controlled use 
of propel cylinders, a mechanically driven cutter head, bulkheads 
within the shield, ground-treatment foam, and a screw conveyor that 
moves excavated material from the working chamber. As noted earlier, 
the forward-most portion of the EPBTBM is the working chamber, and this 
chamber is the only pressurized segment of the EPBTBM. Within the 
shield, the working chamber consists of two sections: the staging 
chamber and the forward working chamber. The staging chamber is the 
section of the working chamber between the man lock door and the entry 
door to the forward working chamber. The forward working chamber is 
immediately behind the cutter head and tunnel face.
    The applicant will pressurize the working chamber to the level 
required to maintain a stable tunnel face. Pressure in the staging 
chamber ranges from atmospheric (no increased pressure) to a maximum 
pressure equal to the pressure in the working chamber. The applicant 
asserts that most of the hyperbaric interventions will be around 14.7 
p.s.i.g. However, the applicant maintains that they may have to perform 
interventions at pressures up to 75 p.s.i.g.
    During interventions, workers enter the working chamber through one 
of the twin man locks that open into the staging chamber. To reach the 
forward part of the working chamber, workers pass through a door in a 
bulkhead that separates the staging chamber from the forward working 
chamber. The maximum crew size allowed in the forward working chamber 
is three. At certain hyperbaric pressures (i.e., when decompression 
times are greater than work times), the twin man locks allow for crew 
rotation. During crew rotation, one crew can be compressing or 
decompressing while the second crew is working. Therefore, the working 
crew always has an unoccupied man lock at its disposal.
    Further, the applicant asserts that it will develop a project-
specific HOM for each future tunnel project that describes in detail 
the hyperbaric procedures and required medical examinations used during 
the planned tunnel-construction project. The HOM will be project-
specific, and will discuss standard operating procedures and emergency 
and contingency procedures. The procedures will include using 
experienced and knowledgeable man-lock attendants who have the training 
and experience necessary to recognize and treat decompression illnesses 
and injuries. The attendants will be under the direct supervision of 
the hyperbaric supervisor and attending physician. In addition, 
procedures will include medical screening and review of prospective 
CAWs. The purpose of this screening procedure is to vet prospective 
CAWs with medical conditions (e.g., deep vein thrombosis, poor vascular 
circulation, and muscle cramping) that could be aggravated by sitting 
in a cramped space (e.g., a man lock) for extended periods or by 
exposure to elevated pressures and compressed gas mixtures. A 
transportable recompression chamber (shuttle) will be available to 
extract workers from the hyperbaric working chamber for emergency 
evacuation and medical treatment; the shuttle attaches to the topside 
medical lock, which is a large recompression chamber. The applicant 
believes that the procedures included in the variance application and 
in its project-specific HOM will provide safe work conditions when 
interventions are necessary, including interventions above 50 p.s.i.g. 
OSHA will comprehensively review the project-specific HOM for each of 
Traylor's future projects prior to granting its approval for Traylor to 
proceed with its new project. Therefore, Traylor may not begin 
hyperbaric interventions at pressures exceeding 50 p.s.i.g. until OSHA 
completes its review of the project-specific HOM and determines that 
the safety and health instructions and measures it specifies would be 
appropriate, would conform with the conditions in the variance, and 
would adequately protect the safety and health of the CAWs. OSHA will 
notify the applicant that: (1) Its project-specific HOM was found to be 
acceptable; and (2) the applicant may begin hyperbaric interventions at 
pressures exceeding 50 p.s.i.g. by complying fully with the conditions 
of the interim order or proposed variance (as an alternative to 
complying with the requirements of the standard).

C. Variance From Paragraph (f)(1) of 29 CFR 1926.803, Requirement To 
Use OSHA Decompression Tables

    OSHA's compressed-air standard for construction requires 
decompression in accordance with the decompression tables in Appendix A 
of 29 CFR 1926, subpart S (see 29 CFR 1926.803(f)(1)). As an 
alternative to the OSHA decompression tables, the applicant proposes to 
use newer decompression schedules that supplement breathing air used 
during decompression with air, nitrox, or trimix (as appropriate). The 
applicant asserts decompression protocols using the 1992 French 
Decompression Tables for air, nitrox, or trimix as specified by the HOM 
are safer for tunnel workers than the decompression protocols specified 
in Appendix A of 29 CFR 1926, subpart S.
    Accordingly, the applicant proposes to use the 1992 French 
Decompression Tables to decompress CAWs after they exit the hyperbaric 
conditions in the working chamber. Also, Traylor proposes to decompress 
with trimix gas, under certain conditions specific to and described in 
detail in the project-specific HOM associated with each future 
tunneling project. Depending on the maximum working pressure and 
exposure times, the 1992 French Decompression Tables provide for air 
decompression with or without oxygen or trimix. Traylor asserts that 
using the 1992 French Decompression Tables for air, nitrox, or trimix 
decompression has many benefits, including (1) keeping the partial 
pressure of nitrogen in the lungs as low as possible; (2) keeping 
external pressure as low as possible to reduce the formation of bubbles 
in the blood; (3) removing nitrogen from the lungs and arterial blood 
and increasing the rate of elimination of nitrogen; (4) improving the 
quality of breathing during decompression stops so that workers are 
less tired and to prevent bone necrosis; (5) reducing decompression 
time by about 33 percent as compared to air decompression; and (6) 
reducing inflammation. Traylor asserts that the 1992 French 
Decompression Tables, Appendix B provide for air decompression with 
trimix supplementation for staged decompression for pressures ranging 
from 58 to 75 p.s.i.g. As described in Section IV of this notice, 
OSHA's review of the use of air, nitrox, or trimix in several major 
tunneling projects completed in the past indicates that it contributed 
significantly to the reduction of decompression illness (DCI) and other 
associated adverse effects observed and reported among CAWs.

[[Page 44390]]

    In addition, the project-specific HOM will require a physician 
certified in hyperbaric medicine to manage the medical condition of 
CAWs during hyperbaric exposures and decompression. A trained and 
experienced man-lock attendant also will be present during hyperbaric 
exposures and decompression. This man lock attendant will operate the 
hyperbaric system to ensure compliance with the specified decompression 
table. A hyperbaric supervisor (competent person), trained in 
hyperbaric operations, procedures, and safety, will directly oversee 
all hyperbaric interventions, and ensures that staff follow the 
procedures delineated in the HOM or by the attending physician.
    The applicant asserts that at higher hyperbaric pressures, 
decompression times exceed 75 minutes. The variance application and the 
project-specific HOMs will establish protocols and procedures that 
provide the basis for alternate means of protection for CAWs under 
these conditions. Accordingly, based on these protocols and procedures, 
the applicant requests to use the 1992 French Decompression Tables for 
hyperbaric interventions up to 75 p.s.i.g. for future projects. The 
applicant is committed to follow the decompression procedures described 
in its application and the project-specific HOM during these 
interventions.

D. Variance From Paragraph (g)(1)(iii) of 29 CFR 1926.803, 
Automatically Regulated Continuous Decompression

    According to the applicant, breathing air under hyperbaric 
conditions increases the amount of nitrogen gas dissolved in a CAW's 
tissues. The greater the hyperbaric pressure under these conditions, 
and the more time spent under the increased pressure, the greater the 
amount of nitrogen gas dissolved in the tissues. When the pressure 
decreases during decompression, tissues release the dissolved nitrogen 
gas into the blood system, which then carries the nitrogen gas to the 
lungs for elimination through exhalation. Releasing hyperbaric pressure 
too rapidly during decompression can increase the size of the bubbles 
formed by nitrogen gas in the blood system, resulting in DCI, commonly 
referred to as ``the bends.'' This description of the etiology of DCI 
is consistent with current scientific theory and research on the issue 
(see footnote 12 in this notice discussing a 1985 NIOSH report on DCI).
    The 1992 French Decompression Tables proposed for use by the 
applicant provide for stops during worker decompression (i.e., staged 
decompression) to control the release of nitrogen gas from tissues into 
the blood system. Studies show that staged decompression, in 
combination with other features of the 1992 French Decompression Tables 
such as the use of oxygen, result in a lower incidence of DCI than the 
OSHA decompression requirements of 29 CFR 1926.803, which specify the 
use of automatically regulated continuous decompression (see footnotes 
10 through 18 in this notice for references to these studies).\4\ In 
addition, the applicant asserts that staged decompression is at least 
as effective as an automatic controller in regulating the decompression 
process because:
---------------------------------------------------------------------------

    \4\ In the study cited in footnote 10, starting at page 338, Dr. 
Eric Kindwall notes that the use of automatically regulated 
continuous decompression in the Washington State safety standards 
for compressed-air work (from which OSHA derived its decompression 
tables) was at the insistence of contractors and the union, and 
against the advice of the expert who calculated the decompression 
table and recommended using staged decompression. Dr. Kindwall then 
states, ``Continuous decompression is inefficient and wasteful. For 
example, if the last stage from 4 psig . . . to the surface took 1 
h, at least half the time is spent at pressures less than 2 psig . . 
., which provides less and less meaningful bubble suppression . . . 
.'' In addition, the report referenced in footnote 5 under the 
section titled, ``Background on the Need for Interim Decompression 
Tables'' addresses the continuous-decompression protocol in the OSHA 
compressed-air standard for construction, noting that ``[a]side from 
the tables for saturation diving to deep depths, no other widely 
used or officially approved diving decompression tables use straight 
line, continuous decompressions at varying rates. Stage 
decompression is usually the rule, since it is simpler to control.''
---------------------------------------------------------------------------

    1. A hyperbaric supervisor (a competent person experienced and 
trained in hyperbaric operations, procedures, and safety) directly 
supervises all hyperbaric interventions and ensures that the man-lock 
attendant, who is a competent person in the manual control of 
hyperbaric systems, follows the schedule specified in the decompression 
tables, including stops; and
    2. The use of the 1992 French Decompression Tables for staged 
decompression offers an equal or better level of management and control 
over the decompression process than an automatic controller and results 
in lower occurrences of DCI.
    Accordingly, the applicant is applying for a permanent variance 
from the OSHA standard at 29 CFR 1926.803(g)(1)(iii), which requires 
automatic controls to regulate decompression. As noted above, the 
applicant is committed to conduct the staged decompression according to 
the 1992 French Decompression Tables under the direct control of the 
trained man-lock attendant and under the oversight of the hyperbaric 
supervisor.

E. Variance From Paragraph (g)(1)(xvii) of 29 CFR 1926.803, Requirement 
of Special Decompression Chamber

    The OSHA compressed-air standard for construction requires 
employers to use a special decompression chamber of sufficient size to 
accommodate all CAWs being decompressed at the end of the shift when 
total decompression time exceeds 75 minutes (see 29 CFR 
1926.803(g)(1)(xvii)). Use of the special decompression chamber enables 
CAWs to move about and flex their joints to prevent neuromuscular 
problems during decompression.
    As an alternative to using a special decompression chamber, the 
applicant notes that since only the working chamber of the EPBTBM is 
under pressure, and only a few workers out of the entire crew are 
exposed to hyperbaric pressure, the man locks (which, as noted earlier, 
connect directly to the working chamber) and the staging chamber are of 
sufficient size to accommodate the exposed workers during 
decompression. In addition, space limitations in the EPBTBM do not 
allow for the installation and use of an additional special 
decompression lock or chamber. Again, the applicant uses the existing 
man locks, each of which adequately accommodates a three-member crew 
for this purpose when decompression lasts up to 75 minutes. When 
decompression exceeds 75 minutes, crews can open the door connecting 
the two compartments in each man lock (during decompression stops) or 
exit the man lock and move into the staging chamber where additional 
space is available. The applicant asserts that this alternative 
arrangement is as effective as a special decompression chamber in that 
it has sufficient space for all the CAWs at the end of a shift and 
enables the CAWs to move about and flex their joints to prevent 
neuromuscular problems.

F. Previous Tunnel Construction Variances

    OSHA notes that on May 23, 2014, it granted a sub-aqueous tunnel 
construction permanent variance to Tully/OHL USA Joint Venture (79 FR 
29809) from the same provisions of the standard that regulates work in 
compressed air (at 29 CFR 1926.803(e)(5), (f)(1), (g)(1)(iii), and 
(g)(1)(xvii)) that are the subject of the present application. 
Additionally, as previously stated in this notice, on March, 27, 2015, 
OSHA also granted a sub-aqueous tunnel construction permanent variance 
to Traylor JV for the

[[Page 44391]]

completion of the Blue Plains Tunnel (80 FR 16440).
    Generally, the proposed alternate conditions in this notice are 
based on and very similar to the alternate conditions of the previous 
permanent variances.

G. Multi-State Variance

    Traylor stated that it performs construction of sub-aqueous tunnels 
using EPBTBM in compressed-air environments in a number of states that 
operate safety and health plans that have been approved by OSHA under 
Section 18 of the Occupational Safety and Health (OSH) Act of 1970 (29 
U.S.C. 651 et seq.) and 29 CFR part 1952 (``Approved State Plans for 
Enforcement of State Standards''). Because Traylor performs tunnel 
construction work nationwide, OSHA will process Traylor's application 
as one for a permanent, multi-state variance covering all states.
    Twenty-seven state safety and health plans have been approved by 
OSHA under Section 18 of the OSH Act.\5\ As part of the permanent 
variance process, the Directorate of Cooperative and State Programs 
will notify the State Plans of Traylor's variance application and grant 
of the interim order, and the states will have the opportunity to 
comment.
---------------------------------------------------------------------------

    \5\ Five State Plans (Connecticut, Illinois, New Jersey, New 
York, and the Virgin Islands) limit their occupational safety and 
health authority to state and local employers only. State Plans that 
exercise their occupational safety and health authority over both 
public- and private-sector employers are: Alaska, Arizona, 
California, Hawaii, Indiana, Iowa, Kentucky, Maryland, Michigan, 
Minnesota, Nevada, New Mexico, North Carolina, Oregon, Puerto Rico, 
South Carolina, Tennessee, Utah, Vermont, Virginia, Washington, and 
Wyoming.
---------------------------------------------------------------------------

    Additionally, in consideration of Traylor's application for a 
permanent multi-state variance and interim order, OSHA noted that four 
states have previously granted sub-aqueous tunnel construction 
variances and imposed different or additional requirements and 
conditions (California, Nevada, Oregon, and Washington). California 
also promulgated a new standard \6\ for similar sub-aqueous tunnel 
construction work. In these states that previously granted variances, 
Traylor would have to continue to meet state-specific requirements, 
should OSHA grant Traylor a permanent multi-state variance. Traylor 
must be prepared to apply separately to these states for a variance for 
tunnel construction work addressing the conditions specified by this 
proposed variance.
---------------------------------------------------------------------------

    \6\ See California Code of Regulations, Title 8, Subchapter 7, 
Group 26, Article 154, available at http://www.dir.ca.gov/title8/sb7g26a154.html.
---------------------------------------------------------------------------

    Five State Plans (Connecticut, Illinois, New Jersey, New York, and 
the U.S. Virgin Islands) cover only public-sector workers and have no 
authority over the private-sector workers addressed in this variance 
application (i.e., that authority continues to reside with Federal 
OSHA).

III. Description of the Conditions Specified by the Application for a 
Permanent Variance

    This section describes the alternative means of compliance with 29 
CFR 1926.803(e)(5), (f)(1), (g)(1)(iii), and (g)(1)(xvii) and provides 
additional detail regarding the proposed conditions that form the basis 
of Traylor's application for a permanent variance.

Proposed Condition A: Scope

    The scope of the permanent variance would limit coverage to the 
work situations specified under this proposed condition. Clearly 
defining the scope of the proposed permanent variance provides Traylor, 
Traylor's employees, potential future applicants, other stakeholders, 
the public, and OSHA with necessary information regarding the work 
situations in which the proposed permanent variance would apply.
    As previously indicated in this notice, according to 29 CFR 
1905.11, an employer (or class or group of employers \7\) may request a 
permanent variance for a specific workplace or workplaces (multiple 
sites). If granted, the variance would apply to the specific 
employer(s) that submitted the application. In this instance, if OSHA 
were to grant a permanent variance, it would apply to the applicant 
only. As a result, it is important to understand that if OSHA were to 
grant Traylor a permanent variance, the interim order and proposed 
variance would not apply to any other employers such as other joint 
ventures the applicant may undertake in the future. However, the 
variance rules of practice do contain provisions for future 
modification of permanent variances. Under the provisions of 29 CFR 
1905.13, an applicant may submit an application to modify or amend a 
permanent variance to add or include additional employers (i.e., when 
future joint ventures are established).
---------------------------------------------------------------------------

    \7\ A class or group of employers (such as members of a trade 
alliance or association) may apply jointly for a variance provided 
an authorized representative for each employer signs the application 
and the application identifies each employer's affected facilities.
---------------------------------------------------------------------------

Proposed Condition B: Application

    The proposed condition specifies the circumstances under which the 
proposed permanent variance would be in effect, notably only for 
hyperbaric work performed during interventions. The proposed condition 
places clear limits on the circumstances under which the applicant can 
expose its employees to hyperbaric pressure.

Proposed Condition C: List of Abbreviations

    This proposed condition defines a number of abbreviations used in 
the proposed permanent variance. OSHA believes that defining these 
abbreviations serves to clarify and standardize their usage, thereby 
enhancing the applicant's and its employees' understanding of the 
conditions specified by the proposed permanent variance.

Proposed Condition D: Definitions

    The proposed condition defines a series of terms, mostly technical 
terms, used in the permanent variance to standardize and clarify their 
meaning. Defining these terms serves to enhance the applicant's and its 
employees' understanding of the conditions specified by the proposed 
permanent variance.

Proposed Condition E: Safety and Health Practices

    The proposed condition requires the applicant to develop and submit 
to OSHA a project-specific HOM at least one year before using the 
EPBTBM for tunneling operations. The HOM will have to demonstrate that 
the EPBTBM planned for use in tunneling operations is designed, 
fabricated, inspected, tested, marked, and stamped in accordance with 
the requirements of ASME PVHO-1.2012 (or most recent edition of Safety 
Standards for Pressure Vessels for Human Occupancy) for the TBM's 
hyperbaric chambers. These requirements ensure that the applicant 
develops hyperbaric safety and health procedures suitable for each 
specific project. The HOM enables OSHA to determine that the safety and 
health instructions and measures it specifies would be appropriate to 
the field conditions of the proposed tunnel (including expected 
geological conditions), would conform to the conditions of the 
variance, and will adequately protect the safety and health of the 
CAWs. It also enables OSHA to enforce these instructions and measures. 
Additionally, the proposed condition includes a series of related 
hazard prevention and control requirements and methods (e.g., 
decompression tables, job hazard analysis (JHA), operations and 
inspections checklists, investigation, recording and notification to 
OSHA of recordable hyperbaric injuries and illnesses, etc.) designed to

[[Page 44392]]

ensure the continued effective functioning of the hyperbaric equipment 
and operating system.
    Review of the project-specific HOM would enable OSHA to: (1) 
Determine that the safety and health instructions and measures it 
specifies would be appropriate, would conform to the conditions of the 
variance, and would adequately protect the safety and health of CAWs; 
and (2) request the applicant to revise or modify the HOM if it finds 
that the hyperbaric safety and health procedures are not suitable for 
the specific project and would not adequately protect the safety and 
health of the CAWs. The applicant may not begin hyperbaric 
interventions at pressures exceeding 50 p.s.i.g. until OSHA completes 
its review of the project-specific HOM and determines that the safety 
and health instructions and measures it specifies would be appropriate, 
would conform to the conditions of the variance, and will adequately 
protect the safety and health of the CAWs. OSHA will notify the 
applicant that: (1) Its project-specific HOM was found to be 
acceptable; and (2) the applicant may begin hyperbaric interventions at 
pressures exceeding 50 p.s.i.g. by complying fully with the conditions 
of the interim order or proposed permanent variance (if, or until the 
permanent variance is granted as an alternative to complying with the 
requirements of the standard).
    Once approved, the project-specific HOM would become part of the 
variance, thus enabling OSHA to enforce its safety and health 
procedures and measures.

Proposed Condition F: Communication

    The proposed condition would require the applicant to develop and 
implement an effective system of information sharing and communication. 
Effective information sharing and communication ensures that affected 
workers receive updated information regarding any safety-related 
hazards and incidents, and corrective actions taken, prior to the start 
of each shift. The proposed condition also requires the applicant to 
ensure that reliable means of emergency communications are available 
and maintained for affected workers and support personnel during 
hyperbaric operations. Availability of such reliable means of 
communications would enable affected workers and support personnel to 
respond quickly and effectively to hazardous conditions or emergencies 
that may develop during EPBTBM operations.

Proposed Condition G: Worker Qualification and Training

    The proposed condition would require the applicant to develop and 
implement an effective qualification and training program for affected 
workers. The proposed condition specifies the factors that an affected 
worker must know to perform safely during hyperbaric operations, 
including how to enter, work in, and exit from hyperbaric conditions 
under both normal and emergency conditions. Having well-trained and 
qualified workers performing hyperbaric intervention work ensures that 
they recognize, and respond appropriately to, hyperbaric safety and 
health hazards. These qualification and training requirements enable 
affected workers to cope effectively with emergencies, as well as the 
discomfort and physiological effects of hyperbaric exposure, thereby 
preventing injury, illness, and fatalities.
    Paragraph (2)(e) of this proposed condition also would require the 
applicant to provide affected workers with information they can use to 
contact the appropriate healthcare professionals if it is suspected 
that they are developing hyperbaric-related health effects. This 
requirement provides for early intervention and treatment of DCI and 
other health effects resulting from hyperbaric exposure, thereby 
reducing the potential severity of these effects.

Proposed Condition H: Inspections, Tests, and Accident Prevention

    The proposed condition would require the applicant to develop, 
implement, and operate a program of frequent and regular inspections of 
the EPBTBM's hyperbaric equipment and support systems, and associated 
work areas. This proposed condition would help to ensure the safe 
operation and physical integrity of the equipment and work areas 
necessary to conduct hyperbaric operations. The proposed condition 
would also enhance worker safety by reducing the risk of hyperbaric-
related emergencies.
    Paragraph (3) of this proposed condition would require the 
applicant to document tests, inspections, corrective actions, and 
repairs involving the EPBTBM, and maintain these documents at the job 
site for the duration of the job. This requirement would provide the 
applicant with information needed to schedule tests and inspections to 
ensure the continued safe operation of the equipment and systems, and 
to determine that the actions taken to correct defects in hyperbaric 
equipment and systems were appropriate, prior to returning them to 
service.

Proposed Condition I: Compression and Decompression

    The proposed condition would require the applicant to consult with 
its designated medical advisor regarding special compression or 
decompression procedures appropriate for any unacclimated CAW. This 
proposed provision would ensure that the applicant consults with the 
medical advisor, and involves the medical advisor in the evaluation, 
development, and implementation of compression or decompression 
protocols appropriate for any CAW requiring acclimation to the 
hyperbaric conditions encountered during EPBTBM operations. 
Accordingly, CAWs requiring acclimation would have an opportunity to 
acclimate prior to exposure to these hyperbaric conditions. OSHA 
believes this proposed condition would prevent or reduce adverse 
reactions among CAWs to the effects of compression or decompression 
associated with the intervention work they perform in the EPBTBM.

Proposed Condition J: Recordkeeping

    The proposed condition would require the applicant to maintain 
records of specific factors associated with each hyperbaric 
intervention. The information gathered and recorded under this 
provision, in concert with the information provided under proposed 
condition K (using OSHA 301 Incident Report form to investigate, 
record, and provide notice to OSHA of hyperbaric recordable injuries as 
defined by 29 CFR 1904.4, 1904.7, 1904.8 through 1904.12), would enable 
the applicant and OSHA to determine the effectiveness of the permanent 
variance in preventing DCI and other hyperbaric-related effects.\8\
---------------------------------------------------------------------------

    \8\ See 29 CFR 1904 Recording and Reporting Occupational 
Injuries and Illnesses (http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9631); recordkeeping 
forms and instructions (http://www.osha.gov/recordkeeping/RKform300pkg-fillable-enabled.pdf); and updates to OSHA's 
recordkeeping rule and Web page ((79 FR 56130); http://www.osha.gov/recordkeeping2014/index.html).
---------------------------------------------------------------------------

Proposed Condition K: Notifications

    Under the proposed condition, the applicant would be required, 
within specified periods, to notify OSHA of: (1) Any recordable injury, 
illness, in-patient hospitalization, amputation, loss of an eye, or 
fatality that occurs as a result of hyperbaric exposures during EPBTBM 
operations; (2) provide OSHA with a copy of the hyperbaric exposures 
incident investigation report (using

[[Page 44393]]

OSHA 301 form) of these events within 24 hours of the incident; (3) 
include on the 301 form information on the hyperbaric conditions 
associated with the recordable injury or illness, the root-cause 
determination, and preventive and corrective actions identified and 
implemented; (4) provide its certification that it informed affected 
workers of the incident and the results of the incident investigation; 
(5) notify the Office of Technical Programs and Coordination Activities 
(OTPCA) and the OSHA Area Office closest to the tunnel project site 
within 15 working days should the applicant need to revise its HOM to 
accommodate changes in its compressed-air operations that affect its 
ability to comply with the conditions of the proposed permanent 
variance; and (6) provide OTPCA and the OSHA Area Office closest to the 
tunnel project site, at the end of the project, with a report 
evaluating the effectiveness of the decompression tables.
    It should be noted that the requirement of completing and 
submitting the hyperbaric exposure-related (recordable) incident 
investigation report (OSHA 301 form) would be more restrictive than the 
current recordkeeping requirement of completing the OSHA 301 form 
within 7 calendar days of the incident (1904.29(b)(3)). This modified 
and more stringent incident investigation and reporting requirement 
would be restricted to intervention-related hyperbaric (recordable) 
incidents only. Providing notification would be essential because time 
is a critical element in OSHA's ability to determine the continued 
effectiveness of the variance conditions in preventing hyperbaric 
incidents, and the applicant's identification and implementation of 
appropriate corrective and preventive actions.
    Further, these notification requirements also would enable the 
applicant, its employees, and OSHA to determine the effectiveness of 
the permanent variance in providing the requisite level of safety to 
the applicant's workers and, based on this determination, whether to 
revise or revoke the conditions of the proposed permanent variance. 
Timely notification would permit OSHA to take whatever action may be 
necessary and appropriate to prevent further injuries and illnesses. 
Providing notification to employees would inform them of the 
precautions taken by the applicant to prevent similar incidents in the 
future.
    Additionally, this proposed condition also would require the 
applicant to notify OSHA if it ceases to do business, has a new address 
or location for its main office, or transfers the operations covered by 
the proposed permanent variance to a successor company. In addition, 
the condition specifies that OSHA must approve the transfer of the 
permanent variance to a successor company. These requirements would 
allow OSHA to communicate effectively with the applicant regarding the 
status of the proposed permanent variance, and expedite the Agency's 
administration and enforcement of the permanent variance. Stipulating 
that an applicant would be required to have OSHA's approval to transfer 
a variance to a successor company would provide assurance that the 
successor company has knowledge of, and will comply with, the 
conditions specified by proposed permanent variance, thereby ensuring 
the safety of workers involved in performing the operations covered by 
the proposed permanent variance.

IV. Grant of Interim Order

    As noted earlier, the applicant requested an interim order. Based 
on Traylor's assertions in its application, the interim order addresses 
CAWs performing interventions in hyperbaric conditions exceeding 50 
p.s.i.g. that involve proposed use of the 1992 French Decompression 
Tables for air, nitrox, or trimix as specified by the HOM for staged 
decompression with pressures ranging from 58 to 75 p.s.i.g. During the 
period starting with the publication of this notice until the Agency 
modifies or revokes the interim order or makes a decision on its 
application for a permanent variance, the applicant is required to 
comply fully with the conditions of the interim order (as an 
alternative to complying with the requirements of 29 CFR 1926.803 
(hereafter, ``the standard'')) that:
    A. Prohibit employers using compressed air under hyperbaric 
conditions from subjecting workers to pressure exceeding 50 p.s.i.g., 
except in an emergency (29 CFR 1926.803(e)(5));
    B. Require the use of decompression values specified by the 
decompression tables in Appendix A of the compressed-air standard (29 
CFR 1926.803(f)(1)); and
    C. Require the use of automated operational controls and a special 
decompression chamber (29 CFR 1926.803(g)(1)(iii) and .803(g)(1)(xvii), 
respectively).
    After reviewing the proposed alternatives OSHA preliminarily 
determined that:
    A. Traylor developed, and proposed to implement, effective 
alternative measures to the prohibition of using compressed air under 
hyperbaric conditions exceeding 50 p.s.i.g. The alternative measures 
include use of engineering and administrative controls of the hazards 
associated with work performed in compressed-air conditions exceeding 
50 p.s.i.g. while engaged in the construction of a subaqueous tunnel 
using advanced shielded mechanical-excavation techniques in conjunction 
with an EPBTBM. Prior to conducting interventions in the EPBTBM's 
pressurized working chamber, the applicant halts tunnel excavation and 
prepares the machine and crew to conduct the interventions. 
Interventions involve inspection, maintenance, or repair of the 
mechanical-excavation components located in the working chamber.
    B. Traylor developed, and proposed to implement, safe hyperbaric 
work procedures, emergency and contingency procedures, and medical 
examinations for future tunneling projects' CAWs. The applicant will 
compile these standard operating procedures into a project-specific 
HOM. The HOM will discuss the procedures and personnel qualifications 
for performing work safely during the compression and decompression 
phases of interventions. The HOM will also specify the decompression 
tables the applicant proposes to use. Depending on the maximum working 
pressure and exposure times during the interventions, the tables 
provide for decompression using the 1992 French Decompression Tables 
for air, nitrox, or trimix as specified by the HOM. The decompression 
tables also include delays or stops for various time intervals at 
different pressure levels during the transition to atmospheric pressure 
(i.e., staged decompression). In all cases, a physician certified in 
hyperbaric medicine will manage the medical condition of CAWs during 
decompression. In addition, a trained and experienced man-lock 
attendant, experienced in recognizing decompression sickness or 
illnesses and injuries will be present. Of key importance, a hyperbaric 
supervisor (competent person), trained in hyperbaric operations, 
procedures, and safety, will directly supervise all hyperbaric 
operations to ensure compliance with the procedures delineated in the 
project-specific HOM or by the attending physician.
    C. Traylor developed, and proposed to implement, a training program 
to instruct affected workers in the hazards associated with conducting 
hyperbaric operations.
    D. Traylor developed, and proposed to implement, an effective 
alternative to the use of automatic controllers that continuously 
decrease pressure to

[[Page 44394]]

achieve decompression in accordance with the tables specified by the 
standard. The alternative includes using: (1) The 1992 French 
Decompression Tables for guiding staged decompression to achieve lower 
occurrences of DCI; (2) decompression protocols of air, nitrox, or 
trimix again to achieve lower occurrences of DCI; (3) a trained and 
competent attendant for implementing appropriate hyperbaric entry and 
exit procedures, and (4) a competent hyperbaric supervisor and 
attending physician certified in hyperbaric medicine, to oversee all 
hyperbaric operations.
    E. Traylor developed, and proposed to implement, an effective 
alternative to the use of the special decompression chamber required by 
the standard. EPBTBM technology permits the tunnel's work areas to be 
at atmospheric pressure, with only the face of the EPBTBM (i.e., the 
working chamber) at elevated pressure during interventions. The 
applicant would limit interventions conducted in the working chamber to 
performing required inspection, maintenance, and repair of the cutting 
tools on the face of the EPBTBM. The EPBTBM's man lock and working 
chamber provide sufficient space for the maximum crew of three CAWs to 
stand up and move around, and safely accommodate decompression times up 
to 360 minutes. Therefore, OSHA preliminarily determined that the 
EPBTBM's man lock and working chamber function as effectively as the 
special decompression chamber required by the standard.
    OSHA conducted a review of the scientific literature regarding 
decompression to determine whether the alternative decompression method 
(i.e., the 1992 French Decompression Tables) Traylor proposed would 
provide a workplace as safe and healthful as that provided by the 
standard. Based on this review, OSHA determined that tunneling 
operations performed with these tables \9\ resulted in a lower 
occurrence of DCI than the decompression tables specified by the 
standard.10 11 12
---------------------------------------------------------------------------

    \9\ In 1992, the French Ministry of Labour replaced the 1974 
French Decompression Tables with the 1992 French Decompression 
Tables, which differ from OSHA's decompression tables in Appendix A 
by using: (1) Staged decompression as opposed to continuous (linear) 
decompression; (2) decompression tables based on air or both air and 
pure oxygen; and (3) emergency tables when unexpected exposure times 
occur (up to 30 minutes above the maximum allowed working time).
    \10\ Kindwall, EP (1997). Compressed-air tunneling and caisson 
work decompression procedures: Development, problems, and solutions. 
Undersea and Hyperbaric Medicine, 24(4), pp. 337-345. This article 
reported 60 treated cases of DCI among 4,168 exposures between 19 
and 31 p.s.i.g. over a 51-week contract period, for a DCI incidence 
of 1.44% for the decompression tables specified by the OSHA 
standard.
    \11\ Sealey, JL (1969). Safe exit from the hyperbaric 
environment: Medical experience with pressurized tunnel operations. 
Journal of Occupational Medicine, 11(5), pp. 273-275. This article 
reported 210 treated cases of DCI among 38,600 hyperbaric exposures 
between 13 and 34 p.s.i.g. over a 32-month period, for an incidence 
of 0.54% for the decompression tables specified by the Washington 
State safety standards for compressed-air work, which are similar to 
the tables in the OSHA standard. Moreover, the article reported 51 
treated cases of DCI for 3,000 exposures between 30 and 34 p.s.i.g., 
for an incidence of 1.7% for the Washington State tables.
    \12\ In 1985, the National Institute for Occupational Safety and 
Health (NIOSH) published a report entitled ``Criteria for Interim 
Decompression Tables for Caisson and Tunnel Workers;'' this report 
reviewed studies of DCI and other hyperbaric-related injuries 
resulting from use of OSHA's tables. This report is available on 
NIOSH's Web site: http://www.cdc.gov/niosh/topics/decompression/default.html.
---------------------------------------------------------------------------

    The review conducted by OSHA focused on the use of the 1992 French 
Decompression Tables with air, nitrox, or trimix and found several 
research studies supporting the determination that such use resulted in 
a lower rate of DCI than the decompression tables specified by the 
standard. For example, H. L. Anderson studied the occurrence of DCI at 
maximum hyperbaric pressures ranging from 4 p.s.i.g. to 43 p.s.i.g. 
during construction of the Great Belt Tunnel in Denmark (1992-1996); 
\13\ this project used the 1992 French Decompression Tables to 
decompress the workers during part of the construction. Anderson 
observed 6 decompression sickness (DCS) cases out of 7,220 
decompression events, and reported that switching to the 1992 French 
Decompression tables reduced the DCI incidence to 0.08%. The DCI 
incidence in the study by H. L. Andersen is substantially less than the 
DCI incidence reported for the decompression tables specified in 
Appendix A. OSHA found no studies in which the DCI incidence reported 
for the 1992 French Decompression Tables were higher than the DCI 
incidence reported for the OSHA decompression tables, nor did OSHA find 
any studies indicating that the 1992 French Decompression Tables were 
more hazardous to employees than the OSHA decompression tables.\14\
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    \13\ Anderson HL (2002). Decompression sickness during 
construction of the Great Belt Tunnel, Denmark. Undersea and 
Hyperbaric Medicine, 29(3), pp. 172-188.
    \14\ Le P[eacute]chon JC, Barre P, Baud JP, Ollivier F 
(September 1996). Compressed-air work--French Tables 1992--
operational results. JCLP Hyperbarie Paris, Centre Medical 
Subaquatique Interentreprise, Marseille: Communication a l'EUBS, pp. 
1-5 (see Ex. OSHA-2012-0036-0005).
---------------------------------------------------------------------------

    OSHA also reviewed the use of trimix in tunneling operations. In 
compressed-air atmospheres greater than 73 p.s.i.g., it becomes 
increasingly more difficult to work due to increased breathing 
resistance, increased risk of DCI, and the adverse effects of the 
increased partial pressures of nitrogen and oxygen. Nitrogen narcosis 
occurs when a diver or CAW breathes a gas mixture with a nitrogen 
partial pressure greater than 2.54 ATA (i.e., 73 p.s.i.g.). Nitrogen 
narcosis compromises judgment, performance, and reaction time of divers 
and CAWs and can lead to loss of consciousness.\15\ There is concern 
that nitrogen narcosis may impair CAWs leading to possible safety 
issues.\16\ Exposure to oxygen at partial pressures greater than normal 
daily living may be toxic to the lungs and central nervous system under 
certain conditions. The higher the partial pressure of oxygen and the 
longer the exposure, the more severe the toxic effects. One way to 
reduce oxygen exposure is to alter the percentage of oxygen in the 
breathing mixture (see footnote 15). Trimix is a mixture of the inert 
gas helium, oxygen and nitrogen. Because helium is less dense than air, 
use of helium in compressed atmospheres decreases breathing resistance 
and allows for adjustment of the partial pressures of oxygen and 
nitrogen to reduce the incidence of nitrogen narcosis and oxygen 
toxicity.
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    \15\ United States Navy. (2011) U.S. Navy Diving Manual, 
Revision 6. Department of the Navy.
    \16\ Van Rees, Vellinga T, Verhoevan A, Jan Dijk F, Sterk W 
(November-December 2006) Health and efficiency in trimix versus air 
breathing in CAWs. Undersea Hyperbaric Medicine 33 (6), pp 419-427. 
This article reported that during construction of the Western 
Scheldt Tunneling Project, there were 52 exposures to trimix at 
81.2-84.1 p.s.i. with no reported cases of DCI. Three of 318 
exposures to compressed air resulted in DCI in this study.
---------------------------------------------------------------------------

    Trimix has been successfully used in deep caisson work and 
tunneling projects including the construction of the Meiko West 
Bridge,\17\ the Western Scheldt Tunnel (see footnote 16), and in the 
Seattle Brightwater Tunneling Project.\18\ During the construction of 
the Western Scheldt Tunnel, there were fewer reported cases of DCIs in 
CAWs using trimix than in other CAWs using just compressed air, despite 
working at higher pressures (see footnotes 16 and 17). Additionally, 
the use of compressed air during the construction of the Western 
Scheldt Tunnel was also

[[Page 44395]]

associated with a slower working pace and operational errors that the 
authors associated with the adverse effects of nitrogen at high 
pressure ((i.e., nitrogen narcosis) (see footnote 16)). Trimix 
decompression tables are proprietary so large studies of workers with 
specific pressure exposure for specific trimix schedules are not 
available. Additional concerns include the lack of a defined 
recompression protocol in the case of DCI and some studies have found 
evidence of cardiopulmonary strain in divers using trimix but at 
pressures greater than those submitted for this variance (see footnote 
15).
---------------------------------------------------------------------------

    \17\ Takishima R, Sterk W, Nashimoto T (1996) Trimix breathing 
in deep caisson work for the construction of Pier (P2) for the Meiko 
West Bridge. Undersea and Hyperbaric Medical Society Meeting 
Abstract. During construction of the Meiko West Bridge, there were 
11 cases of DCI in 2059 trimix exposures for a reported DCI rate of 
1%.
    \18\ Hamilton R, Kay E (November 2008) Boring deep tunnels. 
Proceedings, 3rd of U.S.-Japan Panel on Aerospace-Diving Physiology 
and Technology, and Hyperbaric Medicine.
---------------------------------------------------------------------------

    Review of the literature and reports from presentations to 
professional societies support that the incidence of DCI with this 
technique is lower than the incidence of DCIs reported with the use of 
OSHA tables. In addition, use of trimix reduces the risk of impairment 
from nitrogen narcosis and allows for the adjustment of oxygen partial 
pressure to reduce exposure to elevated oxygen partial pressures (see 
footnotes 16 and 18). Therefore, OSHA preliminarily concludes that the 
proposed use of the 1992 French Decompression Tables would protect 
workers at least as effectively as the OSHA decompression tables.
    Based on a review of available evidence, the experience of State 
Plans that either granted variances (Nevada, Oregon, and Washington) 
\19\ or promulgated a new standard (California) \20\ for hyperbaric 
exposures occurring during similar subaqueous tunnel-construction work, 
and the information provided in the applicant's variance application, 
OSHA is granting an interim order for future tunneling projects and 
announces the application for the permanent variance.
---------------------------------------------------------------------------

    \19\ These state variances are available in the docket: Exs. 
OSHA-2012-0035-0006 (Nevada), OSHA-2012-0035-0007 (Oregon), and 
OSHA-2012-0035-0008 (Washington).
    \20\ See California Code of Regulations, Title 8, Subchapter 7, 
Group 26, Article 154, available at http://www.dir.ca.gov/title8/sb7g26a154.html.
---------------------------------------------------------------------------

    Under section 6(d) of the Occupational Safety and Health Act of 
1970 (29 U.S.C. 655(d)), and based on the record discussed above, the 
Agency preliminarily finds that when the employer complies with the 
conditions of the proposed variance, the working conditions of the 
employer's workers would be at least as safe and healthful as if the 
employer complied with the working conditions specified by paragraphs 
(e)(5), (f)(1), (g)(1)(iii), and (g)(1)(xvii) of 29 CFR 1926.803. 
Therefore, Traylor will: (1) Comply with the conditions listed in the 
future tunnel projects interim order for the period starting with the 
grant of the interim order until the Agency modifies or revokes the 
interim order or makes a decision on its application for a permanent 
variance); (2) comply fully with the specific conditions of the 
variance, if granted; (3) comply fully with all other applicable 
provisions of 29 CFR part 1926; and (4) provide a copy of this Federal 
Register notice to all employees affected by the proposed conditions, 
including the affected employees of other employers, using the same 
means it used to inform these employees of its application for a 
permanent variance.

V. Specific Conditions of the Interim Order and the Application for a 
Permanent Variance

    The following conditions apply to the interim order OSHA is 
granting to Traylor. These conditions specify the alternative means of 
compliance with the requirements of paragraphs 29 CFR 1926.803(e)(5), 
(f)(1), (g)(1)(iii), and (g)(1)(xvii). In addition, these conditions 
are the conditions that specify the alternative means of compliance 
with the requirements of paragraphs 29 CFR 1926.803(e)(5), (f)(1), 
(g)(1)(iii), and (g)(1)(xvii) that OSHA is proposing for Traylor's 
permanent variance. The conditions/proposed conditions would apply to 
all employees of Traylor exposed to hyperbaric conditions. These 
conditions/proposed conditions would be: \21\
---------------------------------------------------------------------------

    \21\ In these conditions, OSHA is using the future conditional 
form of the verb (e.g., ``would''), which pertains to the 
application for a permanent variance (designated as ``permanent 
variance'') but the conditions also apply to the interim order.
---------------------------------------------------------------------------

A. Scope

    The permanent variance would apply only to work:
    1. That occurs in conjunction with construction of future 
subaqueous tunnels using advanced shielded mechanical-excavation 
techniques and involving operation of an EPBTBM;
    2. Performed under compressed-air and hyperbaric conditions up to 
75 p.s.i.g;
    3. In the EPBTBM's forward section (the working chamber) and 
associated hyperbaric chambers used to pressurize and decompress 
employees entering and exiting the working chamber;
    4. Except for the requirements specified by 29 CFR 1926.803(e)(5), 
(f)(1), (g)(1)(iii), and (g)(1)(xvii), Traylor would be required to 
comply fully with all other applicable provisions of 29 CFR part 1926; 
and
    5. The interim order granted to Traylor for future tunnel projects 
will remain in effect until OSHA modifies or revokes this interim order 
or grants Traylor's request for a permanent variance in accordance with 
29 CFR 1905.13.

B. Application

    The permanent variance would apply only when Traylor stops the 
tunnel-boring work, pressurizes the working chamber, and the CAWs 
either enter the working chamber to perform interventions (i.e., 
inspect, maintain, or repair the mechanical-excavation components), or 
exit the working chamber after performing interventions.

C. List of Abbreviations

    Abbreviations used throughout this proposed permanent variance 
would include the following:

1. ATA--Atmosphere Absolute
2. CAW--Compressed-air worker
3. CFR--Code of Federal Regulations
4. DCI--Decompression Illness
5. DCS--Decompression Sickness (or the bends)
6. EPBTBM--Earth Pressure Balanced Tunnel Boring Machine
7. HOM--Hyperbaric Operations and Safety Manual
8. JHA--Job hazard analysis
9. OSHA--Occupational Safety and Health Administration
10. OTPCA--Office of Technical Programs and Coordination Activities

D. Definitions

    The following definitions would apply to this proposed permanent 
variance. These definitions would supplement the definitions in each 
project-specific HOM.
    1. Affected employee or worker--an employee or worker who is 
affected by the conditions of this proposed permanent variance, or any 
one of his or her authorized representatives. The term ``employee'' has 
the meaning defined and used under the Occupational Safety and Health 
Act of 1970 (29 U.S.C. 651 et seq.).
    2. Atmospheric pressure--the pressure of air at sea-level, 
generally, 14.7 p.s.i.a., 1 atmosphere absolute, or 0 p.s.i.g.
    3. Compressed-air worker--an individual who is specially trained 
and medically qualified to perform work in a pressurized environment 
while breathing air at pressures up to 75 p.s.i.g.
    4. Competent person--an individual who is capable of identifying 
existing and predictable hazards in the surroundings or working 
conditions that are unsanitary, hazardous, or dangerous to employees, 
and who has

[[Page 44396]]

authorization to take prompt corrective measures to eliminate them.\22\
---------------------------------------------------------------------------

    \22\ Adapted from 29 CFR 1926.32(f).
---------------------------------------------------------------------------

    5. Decompression illness--an illness (also called decompression 
sickness (DCS) or the bends) caused by gas bubbles appearing in body 
compartments due to a reduction in ambient pressure. Examples of 
symptoms of decompression illness include (but are not limited to): 
Joint pain (also known as the `bends' for agonizing pain or the 
`niggles' for slight pain); areas of bone destruction (termed dysbaric 
osteonecrosis); skin disorders (such as cutis marmorata, which causes a 
pink marbling of the skin); spinal cord and brain disorders (such as 
stroke, paralysis, paresthesia, and bladder dysfunction); 
cardiopulmonary disorders, such as shortness of breath; and arterial 
gas embolism (gas bubbles in the arteries that block blood flow).\23\
---------------------------------------------------------------------------

    \23\ See Appendix 10 of ``A Guide to the Work in Compressed-Air 
Regulations 1996,'' published by the United Kingdom Health and 
Safety Executive available from NIOSH at http://www.cdc.gov/niosh/docket/archive/pdfs/NIOSH-254/compReg1996.pdf.

    Note: Health effects associated with hyperbaric intervention but 
not considered symptoms of DCI can include: Barotrauma (direct 
damage to air-containing cavities in the body such as ears, sinuses 
and lungs); nitrogen narcosis (reversible alteration in 
consciousness that may occur in hyperbaric environments and is 
caused by the anesthetic effect of certain gases at high pressure); 
and oxygen toxicity (a central nervous system condition resulting 
from the harmful effects of breathing molecular oxygen 
---------------------------------------------------------------------------
(O2) at elevated partial pressures).

    6. Earth Pressure Balanced Tunnel Boring Machine--the machinery 
used to excavate the tunnel.
    7. Hot work--any activity performed in a hazardous location that 
may introduce an ignition source into a potentially flammable 
atmosphere.\24\
---------------------------------------------------------------------------

    \24\ Also see 29 CFR 1910.146(b).
---------------------------------------------------------------------------

    8. Hyperbaric--at a higher pressure than atmospheric pressure.
    9. Hyperbaric intervention--a term that describes the process of 
stopping the EPBTBM and preparing and executing work under hyperbaric 
pressure in the working chamber for the purpose of inspecting, 
replacing, or repairing cutting tools and/or the cutterhead structure.
    10. Hyperbaric Operations Manual--a detailed, project-specific 
health and safety plan developed and implemented by Traylor for working 
in compressed air during future hyperbaric tunnel projects.
    11. Job hazard analysis--an evaluation of tasks or operations to 
identify potential hazards and to determine the necessary controls.
    12. Man lock--an enclosed space capable of pressurization, and used 
for compressing or decompressing any employee or material when either 
is passing into or out of a working chamber.
    13. Nitrox--a mixture of oxygen and air and refers to mixtures 
which are more than 21% oxygen.
    14. Pressure--a force acting on a unit area. Usually expressed as 
pounds per square inch (p.s.i.).
    15. p.s.i.--pounds per square inch, a common unit of measurement of 
pressure; a pressure given in p.s.i. corresponds to absolute pressure.
    16. p.s.i.a--pounds per square inch absolute, or absolute pressure, 
is the sum of the atmospheric pressure and gauge pressure. At sea-
level, atmospheric pressure is approximately 14.7 p.s.i. Adding 14.7 to 
a pressure expressed in units of p.s.i.g. will yield the absolute 
pressure, expressed as p.s.i.a.
    17. p.s.i.g.--pounds per square inch gauge, a common unit of 
pressure; pressure expressed as p.s.i.g. corresponds to pressure 
relative to atmospheric pressure. At sea-level, atmospheric pressure is 
approximately 14.7 p.s.i. Subtracting 14.7 from a pressure expressed in 
units of p.s.i.a. yields the gauge pressure, expressed as p.s.i.g.
    18. Qualified person--an individual who, by possession of a 
recognized degree, certificate, or professional standing, or who, by 
extensive knowledge, training, and experience, successfully 
demonstrates an ability to solve or resolve problems relating to the 
subject matter, the work, or the project.\25\
---------------------------------------------------------------------------

    \25\ Adapted from 29 CFR 1926.32(m).
---------------------------------------------------------------------------

    19. Trimix--a mixture of oxygen, nitrogen and helium that is used 
in hyperbaric environments instead of air to reduce nitrogen narcosis 
and the hazards of oxygen toxicity.
    20. Working chamber--an enclosed space in the EPBTBM in which CAWs 
perform interventions, and which is accessible only through a man lock.

E. Safety and Health Practices

    1. Traylor would have to develop and implement a project-specific 
HOM, and submit the HOM to OSHA at least one year before using the 
EPBTBM on the project for which the HOM applies. The HOM would provide 
the governing requirements regarding expected safety and health hazards 
(including anticipated geological conditions) and hyperbaric exposures 
during the tunnel-construction project.
    2. The HOM would be required to demonstrate that the EPBTBM to be 
used on the project is designed, fabricated, inspected, tested, marked, 
and stamped in accordance with the requirements of ASME PVHO-1.2012 (or 
most recent edition of Safety Standards for Pressure Vessels for Human 
Occupancy) for the EPBTBM's hyperbaric chambers.
    3. When submitting the project-specific HOM to OSHA for approval, 
Traylor must demonstrate that it informed its employees of the proposed 
HOM and their right to petition the Assistant Secretary for a variance 
by:
    a. giving a copy of the proposed project-specific HOM to the 
authorized employee representatives;
    b. posting a statement giving a summary of the proposed project-
specific HOM and specifying where its employees may examine a copy of 
the permanent variance application (at the place(s) where the applicant 
normally posts notices to employees or, instead of a summary, posting 
the application itself); or
    c. using other appropriate means.
    4. Traylor may not begin hyperbaric interventions at pressures 
exceeding 50 p.s.i.g. until OSHA completes its review of the project-
specific HOM and determines that the safety and health instructions and 
measures it specifies would be appropriate, would comply with the 
conditions of the variance, and would adequately protect the safety and 
health of CAWs. Traylor would have to receive a written acknowledgement 
from OSHA stating that: (1) OSHA found its project-specific HOM 
acceptable; and (2) OSHA determined that it may begin hyperbaric 
interventions at pressures exceeding 50 p.s.i.g. by complying fully 
with the conditions of the interim order or proposed permanent variance 
(as an alternative to complying with the requirements of the standard). 
Once approved by OSHA, the HOM would become part of this variance for 
the purposes of the project for which it was developed.
    5. Traylor would have to implement the safety and health 
instructions included in the manufacturer's operations manuals for the 
EPBTBM, and the safety and health instructions provided by the 
manufacturer for the operation of decompression equipment.
    6. Traylor would have to use air or trimix as the only breathing 
gas in the working chamber.
    7. Traylor would have to use the 1992 French Decompression Tables 
for air, nitrox, and trimix decompression specified in the HOM, 
specifically, the extracted portions of the 1992 French

[[Page 44397]]

Decompression tables titled, ``French Regulation Air Standard Tables.''
    8. Traylor would have to equip man locks used by its employees with 
an air, nitrox, or trimix-delivery system as specified by the HOM 
approved by OSHA for the project. Traylor would be required to not 
store oxygen or other compressed gases used in conjunction with 
hyperbaric work in the tunnel.
    9. Workers performing hot work under hyperbaric conditions would 
have to use flame-retardant personal protective equipment and clothing.
    10. In hyperbaric work areas, Traylor would have to maintain an 
adequate fire-suppression system approved for hyperbaric work areas.
    11. Traylor would have to develop and implement one or more JHAs 
for work in the hyperbaric work areas, and review, periodically and as 
necessary (e.g., after making changes to a planned intervention that 
affects its operation), the contents of the JHAs with affected 
employees. The JHAs would have to include all the job functions that 
the risk assessment \26\ indicates are essential to prevent injury or 
illness.
---------------------------------------------------------------------------

    \26\ See ANSI/AIHA Z10-2012, American National Standard for 
Occupational Health and Safety Management Systems, for reference.
---------------------------------------------------------------------------

    12. Traylor would have to develop a set of checklists to guide 
compressed-air work and ensure that employees follow the procedures 
required by this proposed permanent variance (including all procedures 
required by the HOM approved by OSHA for the project, which this 
proposed variance would incorporate by reference). The checklists would 
have to include all steps and equipment functions that the risk 
assessment indicates are essential to prevent injury or illness during 
compressed-air work.
    13. Traylor would have to ensure that the safety and health 
provisions of each HOM adequately protect the workers of all 
contractors and subcontractors involved in hyperbaric operations for 
the project to which the HOM applies.\27\
---------------------------------------------------------------------------

    \27\ See ANSI/ASSE A10.33-2011, American National Standard for 
Construction and Demolition Operations--Safety and Health Program 
Requirements for Multi-Employer Projects, for reference.
---------------------------------------------------------------------------

F. Communication

    1. Prior to beginning a shift, Traylor would have to implement a 
system that informs workers exposed to hyperbaric conditions of any 
hazardous occurrences or conditions that might affect their safety, 
including hyperbaric incidents, gas releases, equipment failures, earth 
or rock slides, cave-ins, flooding, fires, or explosions.
    2. Traylor would have to provide a power-assisted means of 
communication among affected workers and support personnel in 
hyperbaric conditions where unassisted voice communication is 
inadequate.
    a. Traylor would have to use an independent power supply for 
powered communication systems, and these systems would have to operate 
such that use or disruption of any one phone or signal location will 
not disrupt the operation of the system from any other location.
    b. Traylor would have to test communication systems at the start of 
each shift and as necessary thereafter to ensure proper operation.

G. Worker Qualifications and Training

    Traylor would have to:
    1. Ensure that each affected worker receives effective training on 
how to safely enter, work in, exit from, and undertake emergency 
evacuation or rescue from, hyperbaric conditions, and document this 
training.
    2. Provide effective instruction, before beginning hyperbaric 
operations, to each worker who performs work, or controls the exposure 
of others, in hyperbaric conditions, and document this instruction. The 
instruction would include:
    a. The physics and physiology of hyperbaric work;
    b. Recognition of pressure-related injuries;
    c. Information on the causes and recognition of the signs and 
symptoms associated with decompression illness, and other hyperbaric 
intervention-related health effects (e.g., barotrauma, nitrogen 
narcosis, and oxygen toxicity).
    d. How to avoid discomfort during compression and decompression;
    e. Information the workers can use to contact the appropriate 
healthcare professionals should the workers have concerns that they may 
be experiencing adverse health effects from hyperbaric exposure; and
    f. Procedures and requirements applicable to the employee in the 
project-specific HOM.
    3. Repeat the instruction specified in paragraph (G)(2) of this 
proposed condition periodically and as necessary (e.g., after making 
changes to its hyperbaric operations).
    4. When conducting training for its hyperbaric workers, make this 
training available to OSHA personnel and notify the OTPCA at OSHA's 
National Office and OSHA's nearest affected Area Office before the 
training takes place.

H. Inspections, Tests, and Accident Prevention

    1. Traylor would have to initiate and maintain a program of 
frequent and regular inspections of the EPBTBM's hyperbaric equipment 
and support systems (such as temperature control, illumination, 
ventilation, and fire-prevention and fire-suppression systems), and 
hyperbaric work areas, as required under 29 CFR 1926.20(b)(2) by:
    a. Developing a set of checklists to be used by a competent person 
in conducting weekly inspections of hyperbaric equipment and work 
areas; and
    b. Ensuring that a competent person conducts daily visual checks 
and weekly inspections of the EPBTBM.
    2. If the competent person determines that the equipment 
constitutes a safety hazard, Traylor would have to remove the equipment 
from service until it corrects the hazardous condition and has the 
correction approved by a qualified person.
    3. Traylor would have to maintain records of all tests and 
inspections of the EPBTBM, as well as associated corrective actions and 
repairs, at the job site for the duration of the job.

I. Compression and Decompression

    Traylor would have to consult with its attending physician 
concerning the need for special compression or decompression exposures 
appropriate for CAWs not acclimated to hyperbaric exposure.

J. Recordkeeping

    Traylor would have to maintain a record of any recordable injury, 
illness, in-patient hospitalization, amputation, loss of an eye, or 
fatality (as defined by 29 CFR part 1904 Recording and Reporting 
Occupational Injuries and Illnesses), resulting from exposure of an 
employee to hyperbaric conditions by completing the OSHA 301 Incident 
Report form and OSHA 300 Log of Work Related Injuries and Illnesses.

    Note:  Examples of important information to include on the OSHA 
301 Incident Report form (along with the corresponding question on 
the form) would have to address the following: the task performed 
(Question (Q) 14); an estimate of the CAW's workload (Q 14); the 
composition of the gas mixture (e.g., air or trimix (Q 14)); the 
pressure worked at (Q 14); temperature in the work and decompression 
environments (Q 14); did something unusual occur during the task or 
decompression (Q 14); time of symptom onset (Q 15); duration of time 
between decompression and onset of symptoms (Q 15); nature and 
duration of symptoms (Q 16); a medical summary of the illness or 
injury (Q 16); duration of the hyperbaric intervention (Q 17); any 
possible contributing factors (Q 17); the number of prior 
interventions completed by injured or ill CAW (Q 17); the number of 
prior interventions completed by injured or ill CAW at that pressure 
(Q 17); the contact information for the treating

[[Page 44398]]

healthcare provider (Q 17); and the date and time of last hyperbaric 
exposure for this CAW.

    In addition to completing the OSHA 301 Incident Report form and 
OSHA 300 Log of Work Related Injuries and Illnesses, Traylor would have 
to maintain records of:
    1. The date, times (e.g., began compression, time spent 
compressing, time performing intervention, time spent decompressing), 
and pressure for each hyperbaric intervention.
    2. The name of each individual worker exposed to hyperbaric 
pressure and the decompression protocols and results for each worker.
    3. The total number of interventions and the amount of hyperbaric 
work time at each pressure.
    4. The post-intervention physical assessment of each individual CAW 
for signs and symptoms of decompression illness, barotrauma, nitrogen 
narcosis, oxygen toxicity or other health effects associated with work 
in compressed air or mixed gasses for each hyperbaric intervention.

K. Notifications

    1. To assist OSHA in administering the conditions specified herein, 
Traylor would have to:
    a. Notify the OTPCA and the nearest affected Area Office of any 
recordable injury, illness, in-patient hospitalization, amputation, 
loss of an eye, or fatality (by submitting the completed OSHA 301 
Incident Report form \28\) resulting from exposure of an employee to 
hyperbaric conditions including those that do not require recompression 
treatment (e.g., nitrogen narcosis, oxygen toxicity, barotrauma), but 
still meet the recordable injury or illness criteria (of 29 CFR 1904). 
The notification would have to be made within 8 hours of the incident, 
or after becoming aware of a recordable injury or illness, and a copy 
of the incident investigation (OSHA 301) would have to be provided 
within 24 hours of the incident, or after becoming aware of a 
recordable injury or illness. In addition to the information required 
by the OSHA 301, the incident-investigation report would have to 
include a root-cause determination, and the preventive and corrective 
actions identified and implemented.
---------------------------------------------------------------------------

    \28\ See footnote 8.
---------------------------------------------------------------------------

    b. Provide certification within 15 days of the incident that it 
informed affected workers of the incident and the results of the 
incident investigation (including the root-cause determination and 
preventive and corrective actions identified and implemented).
    c. Notify the OTPCA and the nearest affected Area Office within 15 
working days and in writing, of any change in the compressed-air 
operations that affects Traylor's ability to comply with the proposed 
conditions specified herein.
    d. Upon completion of each hyperbaric tunnel project, evaluate the 
effectiveness of the decompression tables used throughout the project, 
and provide a written report of this evaluation to the OTPCA and the 
neared affected Area Office.
    Note: The evaluation report would have to contain summaries of: (1) 
the number, dates, durations, and pressures of the hyperbaric 
interventions completed; (2) decompression protocols implemented 
(including composition of gas mixtures (air, oxygen, nitrox, and 
trimix), and the results achieved; (3) the total number of 
interventions and the number of hyperbaric incidents (decompression 
illnesses and/or health effects associated with hyperbaric 
interventions as recorded on OSHA 301 and 300 forms, and relevant 
medical diagnoses and treating physicians' opinions); and (4) root-
causes, and preventive and corrective actions identified and 
implemented.
    e. To assist OSHA in administering the proposed conditions 
specified herein, inform the OTPCA and the nearest affected Area Office 
as soon as possible after it has knowledge that it will:
    i. Cease to do business;
    ii. Change the location and address of the main office for managing 
the tunneling operations specified by the project-specific HOM; or
    iii. Transfer the operations specified herein to a successor 
company.
    f. Notify all affected employees of this interim order/proposed 
permanent variance by the same means required to inform them of its 
application for a variance.
    2. OSHA would have to approve the transfer of the proposed 
permanent variance to a successor company.

Authority and Signature

    David Michaels, Ph.D., MPH, Assistant Secretary of Labor for 
Occupational Safety and Health, 200 Constitution Avenue NW., 
Washington, DC 20210, authorized the preparation of this notice. 
Accordingly, the Agency is issuing this notice pursuant to Section 29 
U.S.C. 655(6)(d), Secretary of Labor's Order No. 1-2012 (77 FR 3912, 
Jan. 25, 2012), and 29 CFR 1905.11.

    Signed at Washington, DC, on July 22, 2015.
David Michaels,
Assistant Secretary of Labor for Occupational Safety and Health.
[FR Doc. 2015-18319 Filed 7-24-15; 8:45 am]
BILLING CODE 4510-26-P



                                              44386                           Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                                Signed at Washington, DC, on July 22,                  of Labor, 200 Constitution Avenue NW.,                   Labor, 200 Constitution Avenue NW.,
                                              2015.                                                    Room N–2625, Washington, DC 20210;                       Room N–3647, Washington, DC 20210;
                                              David Michaels,                                          telephone: (202) 693–2350 (TDY                           telephone: (202) 693–1999; email:
                                              Assistant Secretary of Labor for Occupational            number: (877) 889–5627). Note that                       Meilinger.francis2@dol.gov.
                                              Safety and Health.                                       security procedures may result in                           General and technical information:
                                              [FR Doc. 2015–18320 Filed 7–24–15; 8:45 am]              significant delays in receiving                          Contact Mr. Kevin Robinson, Director,
                                              BILLING CODE 4510–26–P                                   comments and other written materials                     Office of Technical Programs and
                                                                                                       by regular mail. Contact the OSHA                        Coordination Activities, Directorate of
                                                                                                       Docket Office for information about                      Technical Support and Emergency
                                              DEPARTMENT OF LABOR                                      security procedures concerning delivery                  Management, Occupational Safety and
                                                                                                       of materials by express mail, hand                       Health Administration, U.S. Department
                                              Occupational Safety and Health                           delivery, or messenger service. The                      of Labor, 200 Constitution Avenue NW.,
                                              Administration                                           hours of operation for the OSHA Docket                   Room N–3655, Washington, DC 20210;
                                              [Docket No. OSHA–2012–0035]                              Office are 8:15 a.m.–4:45 p.m., e.t.                     telephone: (202) 693–2110; email:
                                                                                                          4. Instructions: All submissions must                 Robinson.kevin@dol.gov. OSHA’s Web
                                              Traylor Bros., Inc., Application for                     include the Agency name and the OSHA                     page includes information about the
                                              Permanent Variance and Interim Order;                    docket number (OSHA–2012–0035).                          Variance Program (see http://
                                              Grant of Interim Order; Request for                      OSHA places comments and other                           www.osha.gov/dts/otpca/variances/
                                              Comments                                                 materials, including any personal                        index.html).
                                                                                                       information, in the public docket                        SUPPLEMENTARY INFORMATION:
                                              AGENCY: Occupational Safety and Health                   without revision, and these materials
                                              Administration (OSHA), Labor.                                                                                       Copies of this Federal Register
                                                                                                       will be available online at http://                      notice. Electronic copies of this Federal
                                              ACTION: Notice.                                          www.regulations.gov. Therefore, the                      Register notice are available at http://
                                                                                                       Agency cautions commenters about                         www.regulations.gov. This Federal
                                              SUMMARY:   In this notice, OSHA                          submitting statements they do not want
                                              announces the application of Traylor                                                                              Register notice, as well as news releases
                                                                                                       made available to the public, or                         and other relevant information, also are
                                              Bros., Inc., for a permanent variance and                submitting comments that contain
                                              interim order from the provisions of                                                                              available at OSHA’s Web page at http://
                                                                                                       personal information (either about                       www.osha.gov.
                                              OSHA standards that regulate work in                     themselves or others) such as Social
                                              compressed-air environments at 29 CFR                                                                               Hearing Requests. According to 29
                                                                                                       Security numbers, birth dates, and                       CFR 1905.15, hearing requests must
                                              1926.803 and presents the Agency’s                       medical data.
                                              preliminary finding to grant the                                                                                  include: (1) A short and plain statement
                                                                                                          5. Docket: To read or download
                                              permanent variance. OSHA also                                                                                     detailing how the proposed variance
                                                                                                       submissions or other material in the
                                              announces its grant of an interim order                                                                           would affect the requesting party; (2) a
                                                                                                       docket, go to http://www.regulations.gov
                                              in this notice. OSHA invites the public                                                                           specification of any statement or
                                                                                                       or the OSHA Docket Office at the
                                              to submit comments on the variance                                                                                representation in the variance
                                                                                                       address above. All documents in the
                                              application to assist the Agency in                                                                               application that the commenter denies,
                                                                                                       docket are listed in the http://
                                              determining whether to grant the                                                                                  and a concise summary of the evidence
                                                                                                       www.regulations.gov index; however,
                                              applicant a permanent variance based                                                                              adduced in support of each denial; and
                                                                                                       some information (e.g., copyrighted
                                              on the conditions specified in this                                                                               (3) any views or arguments on any issue
                                                                                                       material) is not publicly available to
                                              application.                                                                                                      of fact or law presented in the variance
                                                                                                       read or download through the Web site.1
                                                                                                                                                                application.
                                              DATES:   Submit comments, information,                   All submissions, including copyrighted
                                              documents in response to this notice,                    material, are available for inspection at                I. Notice of Application
                                              and request for a hearing on or before                   the OSHA Docket Office. Contact the                         On April 26, 2012, Traylor Bros., Inc.,
                                              August 26, 2015. The interim order                       OSHA Docket Office for assistance in                     835 N. Congress Ave., Evansville, IN
                                              specified by this notice becomes                         locating docket submissions.                             47715, and Traylor/Skanska/Jay Dee
                                              effective on July 27, 2015, and shall                      6. Extension of Comment Period:                        Joint Venture, Blue Plains Tunnel, 5000
                                              remain in effect until the interim order                 Submit requests for an extension of the                  Overlook SW., Washington, DC 20032,
                                              is modified or revoked.                                  comment period on or before August 26,                   submitted under Section 6(d) of the
                                              ADDRESSES: Submit comments by any of
                                                                                                       2015 to the Office of Technical                          Occupational Safety and Health Act of
                                              the following methods:                                   Programs and Coordination Activities,                    1970 (‘‘OSH Act’’; 29 U.S.C. 655) and 29
                                                 1. Electronically: Submit comments                    Variance Program, Directorate of                         CFR 1905.11 (‘‘Variances and other
                                              and attachments electronically at                        Technical Support and Emergency                          relief under section 6(d)’’), an
                                              http://www.regulations.gov, which is                     Management, Occupational Safety and                      application for a permanent variance
                                              the Federal eRulemaking Portal. Follow                   Health Administration, U.S. Department                   from several provisions of the OSHA
                                              the instructions online for making                       of Labor, 200 Constitution Avenue NW.,                   standard that regulates work in
                                              electronic submissions.                                  Room N–3655, Washington, DC 20210,                       compressed air at 29 CFR 1926.803.
                                                 2. Facsimile: If submissions,                         or by fax to (202) 693–1644.                             OSHA is addressing this request as two
                                              including attachments, are not longer                    FOR FURTHER INFORMATION CONTACT:                         separate applications: (1) Traylor Bros.,
                                              than 10 pages, commenters may fax                        Information regarding this notice is                     Inc. (‘‘Traylor’’ or ‘‘the applicant’’)
                                              them to the OSHA Docket Office at (202)                  available from the following sources:                    request for a permanent variance for
                                                                                                         Press inquiries: Contact Mr. Frank
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                                              693–1648.                                                                                                         future tunneling projects; and (2)
                                                 3. Regular or express mail, hand                      Meilinger, Director, OSHA Office of                      Traylor/Skanska/Jay Dee Joint Venture,
                                              delivery, or messenger (courier) service:                Communications, U.S. Department of                       Blue Plains Tunnel (‘‘Traylor JV’’). This
                                              Submit comments, requests, and any                          1 Traylor indicated that the decompression tables
                                                                                                                                                                notice only addresses the Traylor
                                              attachments to the OSHA Docket Office,                   it intends to use for decompression with trimix are
                                                                                                                                                                application for an interim order and
                                              Docket No. OSHA–2012–0035,                               proprietary. Therefore, these tables are not available   permanent variance for future tunneling
                                              Technical Data Center, U.S. Department                   in the docket.                                           projects. This notice does not address


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                                                                              Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices                                           44387

                                              the Traylor JV application for the Blue                  entire tunnel. This technology negates                as well as future projects (Ex. OSHA–
                                              Plains Tunnel Project, which OSHA                        the requirement that all members of a                 2012–0035–0013). In its response to
                                              granted on March 27, 2015 (80 FR                         tunnel-excavation crew work in                        OSHA’s follow-up questions, Traylor
                                              16440).                                                  compressed air while excavating the                   indicated that the maximum pressure to
                                                 Specifically, this notice addresses                   tunnel. These advances in technology                  which it is likely to expose workers
                                              Traylor’s application for a permanent                    modified substantially the methods                    during future project interventions is 75
                                              variance and interim order, applicable                   used by the construction industry to                  p.s.i.g and may involve the use of trimix
                                              to future tunneling projects, from the                   excavate subaqueous tunnels compared                  breathing gas (composed of a mixture of
                                              provisions of the standard that: (1)                     to the caisson work regulated by the                  oxygen, nitrogen, and helium in varying
                                              Prohibit compressed-air worker (CAW)                     current OSHA compressed-air standard                  concentrations used for breathing by
                                              exposure to pressures exceeding 50                       for construction at 29 CFR 1926.803.                  divers and CAWs for compression and
                                              pounds per square inch (p.s.i.) except in                Such advances reduce the number of                    decompression when working at
                                              an emergency (29 CFR 1926.803(e)(5)); 2                  workers exposed, and the total duration               pressures exceeding 73 p.s.i.g.).
                                              (2) require the use of the decompression                 of exposure to hyperbaric pressure                    Therefore, to work effectively on future
                                              values specified in decompression                        during tunnel construction.                           projects, Traylor must perform
                                              tables in Appendix A of the                                 Using shielded mechanical-                         hyperbaric interventions in compressed
                                              compressed-air standard for                              excavation techniques, in conjunction                 air at pressures higher than the
                                              construction (29 CFR 1926.803(f)(1));                    with precast concrete tunnel liners and               maximum pressure specified by the
                                              and (3) require the use of automated                     backfill grout, EPBTBMs provide                       existing OSHA standard, 29 CFR
                                              operational controls and a special                       methods to achieve the face pressures                 1926.803(e)(5), which states: ‘‘No
                                              decompression chamber (29 CFR                            required to maintain a stabilized tunnel              employee shall be subjected to pressure
                                              1926.803(g)(1)(iii) and .803(g)(1)(xvii),                face through various geologies, and                   exceeding 50 p.s.i.g. except in
                                              respectively).                                           isolate that pressure to the forward                  emergency’’ (see footnote 2).
                                                 The applicant is a contractor that                    section (the working chamber) of the                     On July 11, 2013, OSHA granted
                                              works on complex tunnel projects using                   EPBTBM. Interventions in the working                  Traylor JV a project-specific interim
                                              recently developed equipment and                         chamber (the pressurized portion of the               order for the completion of the Blue
                                              procedures for soft-ground tunneling.                    EPBTBM) take place only after halting                 Plains Tunnel in order to permit the
                                              The applicant’s workers engage in the                    tunnel excavation and preparing the                   applicant to begin work while OSHA
                                              construction of tunnels using advanced                   machine and crew for an intervention.                 continued to consider its application for
                                              shielded mechanical excavation                           Interventions occur to inspect or                     a permanent variance (for Traylor JV’s
                                              techniques in conjunction with an earth                  maintain the mechanical-excavation                    completion of the Blue Plains Tunnel,
                                              pressure balanced tunnel boring                          components located in the working                     as well as Traylor’s future tunneling
                                              machine (EPBTBM).                                        chamber. Maintenance conducted in the                 projects). On December 11, 2014, OSHA
                                                 According to its application, Traylor                 working chamber includes changing                     published a Federal Register notice
                                              is likely to be the sole contractor, as                  replaceable cutting tools and disposable              announcing Traylor JV’s application for
                                              well as the general contractor in                        wear bars, and, in rare cases, repairing              permanent variance and interim order,
                                              association with future Joint Venture                    structural damage to the cutter head.                 grant of an interim order, and request
                                              partners for the construction of future                     In addition to innovations in tunnel-              for comments (79 FR 73631). The
                                              tunnels at various sites throughout the                  excavation methods, Traylor asserts that              comment period expired on January 12,
                                              nation. Traylor asserts that generally, it               innovations in hyperbaric medicine and                2015. OSHA did not receive any
                                              bores tunnels (i.e., Blue Plains, as well                technology improve the safety of                      comments on the proposed variance. As
                                              as future tunnels) below the water table                 decompression from hyperbaric                         noted above, on March 27, 2015, OSHA
                                              through soft soils consisting of clay, silt,             exposures. According to Traylor, the use              published the Federal Register notice
                                              and sand.                                                of decompression protocols                            announcing the grant of a permanent
                                                 Traylor employs specially trained                     incorporating oxygen is more efficient,               variance to Traylor JV for completion of
                                              personnel for the construction of the                    effective, and safer for tunnel workers               the Blue Plains Tunnel (80 FR 16440).
                                              tunnel, and states that this construction                than compliance with the                                 During its consideration of the Blue
                                              will use shielded mechanical-                            decompression tables specified by the                 Plains variance, OSHA continued its
                                              excavation techniques. Traylor asserts                   existing OSHA standard (29 CFR 1926,                  technical review of the Traylor’s
                                              that its workers perform hyperbaric                      subpart S, Appendix A decompression                   variance application focusing on the
                                              interventions at pressures greater than                  tables). These hyperbaric exposures are               proposed use of trimix breathing gas
                                              50 p.s.i.g. in the excavation chamber of                 made safe by advances in technology, a                (proposed for use in future tunneling
                                              the EPBTBM; these interventions                          better understanding of hyperbaric                    projects at pressures exceeding 73
                                              consist of conducting inspections and                    medicine, and the development of a                    p.s.i.g.) and developed a second set of
                                              maintenance work on the cutter-head                      project-specific Hyperbaric Operations                follow-up questions that it sent to
                                              structure and cutting tools of the                       Manual (HOM) that requires specialized                Traylor on December 18, 2013 (Ex.
                                              EPBTBM.                                                  medical support and hyperbaric                        OSHA–2012–0035–0002). On January
                                                 Traylor asserts that innovations in                   supervision to provide assistance to a                21, 2014, Traylor submitted its response
                                              tunnel excavation, specifically with                     team of specially trained man lock                    (Ex. OSHA–2012–0035–0009). In its
                                              EPBTBMs, have, in most cases,                            attendants and hyperbaric workers or                  response to OSHA’s follow-up
                                              eliminated the need to pressurize the                    CAWs.                                                 questions, Traylor provided additional
                                                                                                          OSHA initiated a technical review of               technical and scientific information
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                                                2 The decompression tables in Appendix A of            the Traylor’s variance application and                concerning successful trimix use on
                                              subpart S express the maximum working pressures          developed a set of follow-up questions                tunneling projects throughout the
                                              as pounds per square inch gauge (p.s.i.g.), with a       that it sent to Traylor on September 17,              United States, as well as in Europe and
                                              maximum working pressure of 50 p.s.i.g. Therefore,       2012 (Ex. OSHA–2012–0035–0003). On                    Asia. Additionally, Traylor reaffirmed
                                              throughout this notice, OSHA expresses the 50 p.s.i.
                                              value specified by § 1926.803(e)(5) as 50 p.s.i.g.,
                                                                                                       October 26, 2012, Traylor submitted its               that the maximum pressure to which it
                                              consistent with the terminology in Appendix A,           response and a request for an interim                 is likely to expose workers during
                                              Table 1 of subpart S.                                    order for the Blue Plains Tunnel Project,             interventions for future tunneling


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                                              44388                           Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                              projects is 75 p.s.i.g. and may involve                  is designed to reduce regulatory burden               head of the EPBTBM) take place only
                                              the use of trimix breathing gas.                         while maintaining or enhancing                        after the applicant halts tunnel
                                                In reviewing Traylor’s application for                 employees’ safety and health. SIP–IV                  excavation and prepares the machine
                                              future tunneling projects, OSHA                          will focus primarily on OSHA’s                        and crew for an intervention.
                                              focused on the following important                       construction standards.                               Interventions occur to inspect or
                                              considerations:                                             As part of SIP–IV, OSHA is                         maintain the mechanical-excavation
                                                 • Variances are granted only to specific              considering updating the                              components located in the forward
                                              employers that submitted a properly                      decompression tables in Appendix A                    portion of the working chamber.
                                              completed and executed variance                          (1926.803(f)(1)) (77 FR 72783). This                  Maintenance conducted in the forward
                                              application. Traylor has met this requirement            proposed action would permit                          portion of the working chamber
                                              (for the single employer application);                   employers to use decompression                        includes changing replaceable cutting
                                                 • This notice announces only Traylor’s                procedures and updated decompression                  tools, disposable wear bars, and, in rare
                                              (single employer) application for a variance                                                                   cases, repairs to the cutter head due to
                                              dealing with future projects. It does not
                                                                                                       tables that take advantage of new
                                              address Traylor’s future hyperbaric tunneling            hyperbaric technologies used widely in                structural damage.
                                              projects in association with unnamed joint               extreme hyperbaric exposures. If the                     In addition to innovations in tunnel-
                                              venture partners;                                        planned SIP–IV revises Appendix A,                    excavation methods, research conducted
                                                 • Proposed variance conditions require                Traylor (and similar tunneling                        after OSHA published its compressed-
                                              Traylor to submit for OSHA’s review and                  contractors previously granted a                      air standard for construction in 1971,
                                              approval a project-specific HOM at least one             variance) will still require hyperbaric               resulted in advances in hyperbaric
                                              year prior to the start of work on any future                                                                  medicine. In this regard, the applicant
                                              project;
                                                                                                       tunneling variances to address portions
                                                                                                       of the standard not covered by SIP–IV                 asserts that the use of decompression
                                                 • The proposed variance conditions
                                                                                                       (i.e., 29 CFR 1926.803(e)(5);                         protocols incorporating oxygen and
                                              require the HOM to demonstrate that the
                                              EPBTBM to be used on the project is                      .803(g)(1)(iii) and .803(g)(1)(xvii)).                trimix is more efficient, effective, and
                                              designed, fabricated, inspected, tested,                    If SIP–IV is completed (including the              safer for tunnel workers than
                                              marked, and stamped in accordance with the               update of the decompression tables in                 compliance with the existing OSHA
                                              requirements of ASME PVHO–1.2012 (or                     Appendix A (1926.803(f)(1)), OSHA will                standard (29 CFR 1926, subpart S,
                                              most recent edition of Safety Standards for              modify Traylor’s (single employer) and                Appendix A decompression tables).
                                              Pressure Vessels for Human Occupancy) for                similar variances granted to other                    According to the applicant, contractors
                                              the TBM’s hyperbaric chambers.                                                                                 routinely and safely expose employees
                                                 • This condition ensures that each                    employers to include the applicable
                                                                                                       SIP–IV provisions as appropriate.                     performing interventions in the working
                                              proposed future tunneling project can be
                                              comprehensively reviewed on a case-by-case                  OSHA considered Traylor’s                          chamber of EPBTBMs to hyperbaric
                                              basis prior to OSHA granting its approval to             application for a permanent variance                  pressures up to 75 p.s.i.g., which is 50%
                                              Traylor to proceed with its new project;                 and interim order for future tunneling                higher than maximum pressure
                                                 • Traylor may not begin hyperbaric                    projects. OSHA determined that Traylor                specified by the existing OSHA standard
                                              interventions at pressures exceeding 50                  proposed an alternative that will                     (see 29 CFR 1926.803(e)(5)).
                                              p.s.i.g. until OSHA completes its review of              provide a workplace at least as safe and                 The applicant contends that the
                                              the project-specific HOM and determines that                                                                   alternative safety measures included in
                                              the safety and health instructions and
                                                                                                       healthful as that provided by the
                                                                                                       standard.                                             its application provide its workers with
                                              measures it specifies would be appropriate,
                                              would comply with the conditions of the
                                                                                                                                                             a place of employment that is at least as
                                                                                                       II. The Variance Application                          safe and healthful as they would obtain
                                              variance, would adequately protect the safety
                                              and health of CAWs, and so notifies the                  A. Background                                         under the existing provisions of OSHA’s
                                              applicant; and                                                                                                 compressed-air standard for
                                                 • Traylor will be required to submit new                Traylor asserts that the advances in                construction. The applicant certifies
                                              applications requesting modification of its              tunnel excavation technology described                that it provided employee
                                              single employer variance and approval of its             in Section I of this notice modified                  representatives of affected workers with
                                              project-specific HOM [with sufficient lead               significantly the equipment and                       a copy of the variance application.3 The
                                              time (at least one year prior to start of work           methods used by contractors to                        applicant also certifies that it notified its
                                              on any future project), to allow OSHA to                 construct subaqueous tunnels, thereby
                                              complete the variance modification process],                                                                   workers of the variance application by
                                                                                                       making several provisions of OSHA’s                   posting at prominent locations where it
                                              upon forming any future joint ventures.                  compressed-air standard for                           normally posts workplace notices, a
                                                Further, on December 6, 2012, OSHA                     construction at 29 CFR 1926.803                       summary of the application and
                                              published a Federal Register notice (77                  inappropriate for this type of work.                  information specifying where the
                                              FR 72781) announcing a request for                       These advances reduce both the number                 workers can examine a copy of the
                                              information (RFI) for its continuing                     of workers exposed, and the total                     application. In addition, the applicant
                                              regulatory reviews named standards                       duration of exposure to the hyperbaric                informed its workers and their
                                              improvement projects (SIPs). The                         conditions associated with tunnel                     representatives of their rights to petition
                                              Agency conducted similar regulatory                      construction.                                         the Assistant Secretary of Labor for
                                              reviews of its existing standards                          Using shielded mechanical-                          Occupational Safety and Health for a
                                              previously and issued this latest RFI to                 excavation techniques, in conjunction                 hearing on the variance application.
                                              initiate another of these regulatory                     with pre-cast concrete tunnel liners and
                                              reviews, and naming this review the                      backfill grout, EPBTBMs provide                       B. Variance From Paragraph (e)(5) of 29
                                              Standards Improvement Project—Phase                      methods to achieve the face pressures                 CFR 1926.803, Prohibition of Exposure
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                                              IV (SIP–IV). The purpose of SIP–IV is to                 required to maintain a stabilized tunnel              to Pressure Greater Than 50 p.s.i.g. (see
                                              improve and streamline OSHA                              face, through various geologies, while                Footnote 1)
                                              standards by removing or revising                        isolating that pressure to the forward                  The applicant states that it may
                                              requirements that are confusing or                       section (working or excavation chamber)               perform hyperbaric interventions at
                                              outdated, or that duplicate, or are                      of the EPBTBM.
                                              inconsistent with other standards.                         Interventions involving the working                  3 See the definition of ‘‘Affected employee or

                                              Additionally, the regulatory review also                 chamber (the pressurized chamber at the               worker’’ in section III. D.



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                                                                              Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices                                           44389

                                              pressures greater than 50 p.s.i.g. in the                in detail the hyperbaric procedures and               C. Variance From Paragraph (f)(1) of 29
                                              working chamber of the EPBTBM; this                      required medical examinations used                    CFR 1926.803, Requirement To Use
                                              pressure exceeds the pressure limit of                   during the planned tunnel-construction                OSHA Decompression Tables
                                              50 p.s.i.g. specified for nonemergency                   project. The HOM will be project-                        OSHA’s compressed-air standard for
                                              purposes by 29 CFR 1926.803(e)(5). The                   specific, and will discuss standard                   construction requires decompression in
                                              EPBTBM has twin man locks, with each                     operating procedures and emergency                    accordance with the decompression
                                              man lock having two compartments.                        and contingency procedures. The                       tables in Appendix A of 29 CFR 1926,
                                              This configuration allows workers to                     procedures will include using                         subpart S (see 29 CFR 1926.803(f)(1)).
                                              access the man locks for compression                     experienced and knowledgeable man-                    As an alternative to the OSHA
                                              and decompression, and medical                                                                                 decompression tables, the applicant
                                                                                                       lock attendants who have the training
                                              personnel to access the man locks if                                                                           proposes to use newer decompression
                                                                                                       and experience necessary to recognize
                                              required in an emergency.                                                                                      schedules that supplement breathing air
                                                 EPBTBMs are capable of maintaining                    and treat decompression illnesses and
                                                                                                       injuries. The attendants will be under                used during decompression with air,
                                              pressure at the tunnel face, and
                                                                                                       the direct supervision of the hyperbaric              nitrox, or trimix (as appropriate). The
                                              stabilizing existing geological
                                                                                                       supervisor and attending physician. In                applicant asserts decompression
                                              conditions, through the controlled use
                                                                                                       addition, procedures will include                     protocols using the 1992 French
                                              of propel cylinders, a mechanically
                                                                                                       medical screening and review of                       Decompression Tables for air, nitrox, or
                                              driven cutter head, bulkheads within
                                              the shield, ground-treatment foam, and                   prospective CAWs. The purpose of this                 trimix as specified by the HOM are safer
                                              a screw conveyor that moves excavated                    screening procedure is to vet                         for tunnel workers than the
                                              material from the working chamber. As                                                                          decompression protocols specified in
                                                                                                       prospective CAWs with medical
                                              noted earlier, the forward-most portion                                                                        Appendix A of 29 CFR 1926, subpart S.
                                                                                                       conditions (e.g., deep vein thrombosis,                  Accordingly, the applicant proposes
                                              of the EPBTBM is the working chamber,                    poor vascular circulation, and muscle                 to use the 1992 French Decompression
                                              and this chamber is the only pressurized                 cramping) that could be aggravated by                 Tables to decompress CAWs after they
                                              segment of the EPBTBM. Within the                        sitting in a cramped space (e.g., a man               exit the hyperbaric conditions in the
                                              shield, the working chamber consists of                  lock) for extended periods or by
                                              two sections: the staging chamber and                                                                          working chamber. Also, Traylor
                                                                                                       exposure to elevated pressures and                    proposes to decompress with trimix gas,
                                              the forward working chamber. The                         compressed gas mixtures. A
                                              staging chamber is the section of the                                                                          under certain conditions specific to and
                                                                                                       transportable recompression chamber                   described in detail in the project-
                                              working chamber between the man lock
                                                                                                       (shuttle) will be available to extract                specific HOM associated with each
                                              door and the entry door to the forward
                                                                                                       workers from the hyperbaric working                   future tunneling project. Depending on
                                              working chamber. The forward working
                                              chamber is immediately behind the                        chamber for emergency evacuation and                  the maximum working pressure and
                                              cutter head and tunnel face.                             medical treatment; the shuttle attaches               exposure times, the 1992 French
                                                 The applicant will pressurize the                     to the topside medical lock, which is a               Decompression Tables provide for air
                                              working chamber to the level required                    large recompression chamber. The                      decompression with or without oxygen
                                              to maintain a stable tunnel face.                        applicant believes that the procedures                or trimix. Traylor asserts that using the
                                              Pressure in the staging chamber ranges                   included in the variance application                  1992 French Decompression Tables for
                                              from atmospheric (no increased                           and in its project-specific HOM will                  air, nitrox, or trimix decompression has
                                              pressure) to a maximum pressure equal                    provide safe work conditions when                     many benefits, including (1) keeping the
                                              to the pressure in the working chamber.                  interventions are necessary, including                partial pressure of nitrogen in the lungs
                                              The applicant asserts that most of the                   interventions above 50 p.s.i.g. OSHA                  as low as possible; (2) keeping external
                                              hyperbaric interventions will be around                  will comprehensively review the                       pressure as low as possible to reduce the
                                              14.7 p.s.i.g. However, the applicant                     project-specific HOM for each of                      formation of bubbles in the blood; (3)
                                              maintains that they may have to perform                                                                        removing nitrogen from the lungs and
                                                                                                       Traylor’s future projects prior to
                                              interventions at pressures up to 75                                                                            arterial blood and increasing the rate of
                                                                                                       granting its approval for Traylor to
                                              p.s.i.g.                                                                                                       elimination of nitrogen; (4) improving
                                                                                                       proceed with its new project. Therefore,              the quality of breathing during
                                                 During interventions, workers enter
                                                                                                       Traylor may not begin hyperbaric                      decompression stops so that workers are
                                              the working chamber through one of the
                                              twin man locks that open into the                        interventions at pressures exceeding 50               less tired and to prevent bone necrosis;
                                              staging chamber. To reach the forward                    p.s.i.g. until OSHA completes its review              (5) reducing decompression time by
                                              part of the working chamber, workers                     of the project-specific HOM and                       about 33 percent as compared to air
                                              pass through a door in a bulkhead that                   determines that the safety and health                 decompression; and (6) reducing
                                              separates the staging chamber from the                   instructions and measures it specifies                inflammation. Traylor asserts that the
                                              forward working chamber. The                             would be appropriate, would conform                   1992 French Decompression Tables,
                                              maximum crew size allowed in the                         with the conditions in the variance, and              Appendix B provide for air
                                              forward working chamber is three. At                     would adequately protect the safety and               decompression with trimix
                                              certain hyperbaric pressures (i.e., when                 health of the CAWs. OSHA will notify                  supplementation for staged
                                              decompression times are greater than                     the applicant that: (1) Its project-specific          decompression for pressures ranging
                                              work times), the twin man locks allow                    HOM was found to be acceptable; and                   from 58 to 75 p.s.i.g. As described in
                                              for crew rotation. During crew rotation,                 (2) the applicant may begin hyperbaric                Section IV of this notice, OSHA’s review
                                              one crew can be compressing or                           interventions at pressures exceeding 50               of the use of air, nitrox, or trimix in
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                                              decompressing while the second crew is                   p.s.i.g. by complying fully with the                  several major tunneling projects
                                              working. Therefore, the working crew                     conditions of the interim order or                    completed in the past indicates that it
                                              always has an unoccupied man lock at                     proposed variance (as an alternative to               contributed significantly to the
                                              its disposal.                                            complying with the requirements of the                reduction of decompression illness
                                                 Further, the applicant asserts that it                standard).                                            (DCI) and other associated adverse
                                              will develop a project-specific HOM for                                                                        effects observed and reported among
                                              each future tunnel project that describes                                                                      CAWs.


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                                              44390                           Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                                 In addition, the project-specific HOM                 decompression) to control the release of                   man-lock attendant and under the
                                              will require a physician certified in                    nitrogen gas from tissues into the blood                   oversight of the hyperbaric supervisor.
                                              hyperbaric medicine to manage the                        system. Studies show that staged
                                                                                                                                                                  E. Variance From Paragraph (g)(1)(xvii)
                                              medical condition of CAWs during                         decompression, in combination with
                                                                                                                                                                  of 29 CFR 1926.803, Requirement of
                                              hyperbaric exposures and                                 other features of the 1992 French
                                                                                                                                                                  Special Decompression Chamber
                                              decompression. A trained and                             Decompression Tables such as the use
                                              experienced man-lock attendant also                      of oxygen, result in a lower incidence of                     The OSHA compressed-air standard
                                              will be present during hyperbaric                        DCI than the OSHA decompression                            for construction requires employers to
                                              exposures and decompression. This                        requirements of 29 CFR 1926.803,                           use a special decompression chamber of
                                              man lock attendant will operate the                      which specify the use of automatically                     sufficient size to accommodate all
                                              hyperbaric system to ensure compliance                   regulated continuous decompression                         CAWs being decompressed at the end of
                                              with the specified decompression table.                  (see footnotes 10 through 18 in this                       the shift when total decompression time
                                              A hyperbaric supervisor (competent                       notice for references to these studies).4                  exceeds 75 minutes (see 29 CFR
                                              person), trained in hyperbaric                           In addition, the applicant asserts that                    1926.803(g)(1)(xvii)). Use of the special
                                              operations, procedures, and safety, will                 staged decompression is at least as                        decompression chamber enables CAWs
                                              directly oversee all hyperbaric                          effective as an automatic controller in                    to move about and flex their joints to
                                              interventions, and ensures that staff                    regulating the decompression process                       prevent neuromuscular problems during
                                              follow the procedures delineated in the                  because:                                                   decompression.
                                              HOM or by the attending physician.                          1. A hyperbaric supervisor (a                              As an alternative to using a special
                                                 The applicant asserts that at higher                  competent person experienced and                           decompression chamber, the applicant
                                              hyperbaric pressures, decompression                      trained in hyperbaric operations,                          notes that since only the working
                                              times exceed 75 minutes. The variance                    procedures, and safety) directly                           chamber of the EPBTBM is under
                                              application and the project-specific                     supervises all hyperbaric interventions                    pressure, and only a few workers out of
                                              HOMs will establish protocols and                        and ensures that the man-lock                              the entire crew are exposed to
                                              procedures that provide the basis for                    attendant, who is a competent person in                    hyperbaric pressure, the man locks
                                              alternate means of protection for CAWs                   the manual control of hyperbaric                           (which, as noted earlier, connect
                                              under these conditions. Accordingly,                     systems, follows the schedule specified                    directly to the working chamber) and
                                              based on these protocols and                             in the decompression tables, including                     the staging chamber are of sufficient size
                                              procedures, the applicant requests to                    stops; and                                                 to accommodate the exposed workers
                                              use the 1992 French Decompression                           2. The use of the 1992 French                           during decompression. In addition,
                                              Tables for hyperbaric interventions up                   Decompression Tables for staged                            space limitations in the EPBTBM do not
                                              to 75 p.s.i.g. for future projects. The                  decompression offers an equal or better                    allow for the installation and use of an
                                              applicant is committed to follow the                     level of management and control over                       additional special decompression lock
                                              decompression procedures described in                    the decompression process than an                          or chamber. Again, the applicant uses
                                              its application and the project-specific                 automatic controller and results in                        the existing man locks, each of which
                                              HOM during these interventions.                          lower occurrences of DCI.                                  adequately accommodates a three-
                                                                                                          Accordingly, the applicant is applying                  member crew for this purpose when
                                              D. Variance From Paragraph (g)(1)(iii) of                for a permanent variance from the                          decompression lasts up to 75 minutes.
                                              29 CFR 1926.803, Automatically                           OSHA standard at 29 CFR                                    When decompression exceeds 75
                                              Regulated Continuous Decompression                       1926.803(g)(1)(iii), which requires                        minutes, crews can open the door
                                                 According to the applicant, breathing                 automatic controls to regulate                             connecting the two compartments in
                                              air under hyperbaric conditions                          decompression. As noted above, the                         each man lock (during decompression
                                              increases the amount of nitrogen gas                     applicant is committed to conduct the                      stops) or exit the man lock and move
                                              dissolved in a CAW’s tissues. The                        staged decompression according to the                      into the staging chamber where
                                              greater the hyperbaric pressure under                    1992 French Decompression Tables                           additional space is available. The
                                              these conditions, and the more time                      under the direct control of the trained                    applicant asserts that this alternative
                                              spent under the increased pressure, the                                                                             arrangement is as effective as a special
                                              greater the amount of nitrogen gas                          4 In the study cited in footnote 10, starting at page   decompression chamber in that it has
                                              dissolved in the tissues. When the                       338, Dr. Eric Kindwall notes that the use of               sufficient space for all the CAWs at the
                                              pressure decreases during                                automatically regulated continuous decompression
                                                                                                       in the Washington State safety standards for
                                                                                                                                                                  end of a shift and enables the CAWs to
                                              decompression, tissues release the                       compressed-air work (from which OSHA derived its           move about and flex their joints to
                                              dissolved nitrogen gas into the blood                    decompression tables) was at the insistence of             prevent neuromuscular problems.
                                              system, which then carries the nitrogen                  contractors and the union, and against the advice
                                              gas to the lungs for elimination through                 of the expert who calculated the decompression             F. Previous Tunnel Construction
                                              exhalation. Releasing hyperbaric
                                                                                                       table and recommended using staged                         Variances
                                                                                                       decompression. Dr. Kindwall then states,
                                              pressure too rapidly during                              ‘‘Continuous decompression is inefficient and                 OSHA notes that on May 23, 2014, it
                                              decompression can increase the size of                   wasteful. For example, if the last stage from 4 psig       granted a sub-aqueous tunnel
                                              the bubbles formed by nitrogen gas in                    . . . to the surface took 1 h, at least half the time      construction permanent variance to
                                                                                                       is spent at pressures less than 2 psig . . ., which
                                              the blood system, resulting in DCI,                      provides less and less meaningful bubble
                                                                                                                                                                  Tully/OHL USA Joint Venture (79 FR
                                              commonly referred to as ‘‘the bends.’’                   suppression . . . .’’ In addition, the report              29809) from the same provisions of the
                                              This description of the etiology of DCI                  referenced in footnote 5 under the section titled,         standard that regulates work in
                                              is consistent with current scientific                    ‘‘Background on the Need for Interim                       compressed air (at 29 CFR
                                                                                                       Decompression Tables’’ addresses the continuous-
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                                              theory and research on the issue (see                    decompression protocol in the OSHA compressed-
                                                                                                                                                                  1926.803(e)(5), (f)(1), (g)(1)(iii), and
                                              footnote 12 in this notice discussing a                  air standard for construction, noting that ‘‘[a]side       (g)(1)(xvii)) that are the subject of the
                                              1985 NIOSH report on DCI).                               from the tables for saturation diving to deep depths,      present application. Additionally, as
                                                 The 1992 French Decompression                         no other widely used or officially approved diving         previously stated in this notice, on
                                                                                                       decompression tables use straight line, continuous
                                              Tables proposed for use by the applicant                 decompressions at varying rates. Stage
                                                                                                                                                                  March, 27, 2015, OSHA also granted a
                                              provide for stops during worker                          decompression is usually the rule, since it is             sub-aqueous tunnel construction
                                              decompression (i.e., staged                              simpler to control.’’                                      permanent variance to Traylor JV for the


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                                                                              Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices                                              44391

                                              completion of the Blue Plains Tunnel                     Virgin Islands) cover only public-sector                work performed during interventions.
                                              (80 FR 16440).                                           workers and have no authority over the                  The proposed condition places clear
                                                Generally, the proposed alternate                      private-sector workers addressed in this                limits on the circumstances under
                                              conditions in this notice are based on                   variance application (i.e., that authority              which the applicant can expose its
                                              and very similar to the alternate                        continues to reside with Federal OSHA).                 employees to hyperbaric pressure.
                                              conditions of the previous permanent
                                              variances.                                               III. Description of the Conditions                      Proposed Condition C: List of
                                                                                                       Specified by the Application for a                      Abbreviations
                                              G. Multi-State Variance                                  Permanent Variance                                        This proposed condition defines a
                                                 Traylor stated that it performs                          This section describes the alternative               number of abbreviations used in the
                                              construction of sub-aqueous tunnels                      means of compliance with 29 CFR                         proposed permanent variance. OSHA
                                              using EPBTBM in compressed-air                           1926.803(e)(5), (f)(1), (g)(1)(iii), and                believes that defining these
                                              environments in a number of states that                  (g)(1)(xvii) and provides additional                    abbreviations serves to clarify and
                                              operate safety and health plans that                     detail regarding the proposed conditions                standardize their usage, thereby
                                              have been approved by OSHA under                         that form the basis of Traylor’s                        enhancing the applicant’s and its
                                              Section 18 of the Occupational Safety                    application for a permanent variance.                   employees’ understanding of the
                                              and Health (OSH) Act of 1970 (29 U.S.C.                                                                          conditions specified by the proposed
                                              651 et seq.) and 29 CFR part 1952                        Proposed Condition A: Scope                             permanent variance.
                                              (‘‘Approved State Plans for Enforcement                     The scope of the permanent variance
                                              of State Standards’’). Because Traylor                   would limit coverage to the work                        Proposed Condition D: Definitions
                                              performs tunnel construction work                        situations specified under this proposed                  The proposed condition defines a
                                              nationwide, OSHA will process                            condition. Clearly defining the scope of                series of terms, mostly technical terms,
                                              Traylor’s application as one for a                       the proposed permanent variance                         used in the permanent variance to
                                              permanent, multi-state variance                          provides Traylor, Traylor’s employees,                  standardize and clarify their meaning.
                                              covering all states.                                     potential future applicants, other                      Defining these terms serves to enhance
                                                 Twenty-seven state safety and health                  stakeholders, the public, and OSHA                      the applicant’s and its employees’
                                              plans have been approved by OSHA                         with necessary information regarding                    understanding of the conditions
                                              under Section 18 of the OSH Act.5 As                     the work situations in which the                        specified by the proposed permanent
                                              part of the permanent variance process,                  proposed permanent variance would                       variance.
                                              the Directorate of Cooperative and State                 apply.                                                  Proposed Condition E: Safety and
                                              Programs will notify the State Plans of                     As previously indicated in this notice,              Health Practices
                                              Traylor’s variance application and grant                 according to 29 CFR 1905.11, an
                                              of the interim order, and the states will                employer (or class or group of                             The proposed condition requires the
                                              have the opportunity to comment.                         employers 7) may request a permanent                    applicant to develop and submit to
                                                 Additionally, in consideration of                     variance for a specific workplace or                    OSHA a project-specific HOM at least
                                              Traylor’s application for a permanent                    workplaces (multiple sites). If granted,                one year before using the EPBTBM for
                                              multi-state variance and interim order,                  the variance would apply to the specific                tunneling operations. The HOM will
                                              OSHA noted that four states have                         employer(s) that submitted the                          have to demonstrate that the EPBTBM
                                              previously granted sub-aqueous tunnel                    application. In this instance, if OSHA                  planned for use in tunneling operations
                                              construction variances and imposed                       were to grant a permanent variance, it                  is designed, fabricated, inspected,
                                              different or additional requirements and                 would apply to the applicant only. As                   tested, marked, and stamped in
                                              conditions (California, Nevada, Oregon,                  a result, it is important to understand                 accordance with the requirements of
                                              and Washington). California also                         that if OSHA were to grant Traylor a                    ASME PVHO–1.2012 (or most recent
                                              promulgated a new standard 6 for                         permanent variance, the interim order                   edition of Safety Standards for Pressure
                                              similar sub-aqueous tunnel construction                  and proposed variance would not apply                   Vessels for Human Occupancy) for the
                                              work. In these states that previously                    to any other employers such as other                    TBM’s hyperbaric chambers. These
                                              granted variances, Traylor would have                    joint ventures the applicant may                        requirements ensure that the applicant
                                              to continue to meet state-specific                       undertake in the future. However, the                   develops hyperbaric safety and health
                                              requirements, should OSHA grant                          variance rules of practice do contain                   procedures suitable for each specific
                                              Traylor a permanent multi-state                          provisions for future modification of                   project. The HOM enables OSHA to
                                              variance. Traylor must be prepared to                    permanent variances. Under the                          determine that the safety and health
                                              apply separately to these states for a                   provisions of 29 CFR 1905.13, an                        instructions and measures it specifies
                                              variance for tunnel construction work                    applicant may submit an application to                  would be appropriate to the field
                                              addressing the conditions specified by                   modify or amend a permanent variance                    conditions of the proposed tunnel
                                              this proposed variance.                                  to add or include additional employers                  (including expected geological
                                                 Five State Plans (Connecticut, Illinois,              (i.e., when future joint ventures are                   conditions), would conform to the
                                              New Jersey, New York, and the U.S.                                                                               conditions of the variance, and will
                                                                                                       established).
                                                                                                                                                               adequately protect the safety and health
                                                5 Five State Plans (Connecticut, Illinois, New         Proposed Condition B: Application                       of the CAWs. It also enables OSHA to
                                              Jersey, New York, and the Virgin Islands) limit their
                                              occupational safety and health authority to state          The proposed condition specifies the                  enforce these instructions and measures.
                                              and local employers only. State Plans that exercise      circumstances under which the                           Additionally, the proposed condition
                                              their occupational safety and health authority over      proposed permanent variance would be                    includes a series of related hazard
                                              both public- and private-sector employers are:
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                                              Alaska, Arizona, California, Hawaii, Indiana, Iowa,
                                                                                                       in effect, notably only for hyperbaric                  prevention and control requirements
                                              Kentucky, Maryland, Michigan, Minnesota, Nevada,                                                                 and methods (e.g., decompression
                                              New Mexico, North Carolina, Oregon, Puerto Rico,           7 A class or group of employers (such as members      tables, job hazard analysis (JHA),
                                              South Carolina, Tennessee, Utah, Vermont,                of a trade alliance or association) may apply jointly   operations and inspections checklists,
                                              Virginia, Washington, and Wyoming.                       for a variance provided an authorized
                                                6 See California Code of Regulations, Title 8,         representative for each employer signs the
                                                                                                                                                               investigation, recording and notification
                                              Subchapter 7, Group 26, Article 154, available at        application and the application identifies each         to OSHA of recordable hyperbaric
                                              http://www.dir.ca.gov/title8/sb7g26a154.html.            employer’s affected facilities.                         injuries and illnesses, etc.) designed to


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                                              44392                           Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                              ensure the continued effective                           Proposed Condition G: Worker                          appropriate, prior to returning them to
                                              functioning of the hyperbaric equipment                  Qualification and Training                            service.
                                              and operating system.                                                                                          Proposed Condition I: Compression and
                                                                                                          The proposed condition would
                                                Review of the project-specific HOM                     require the applicant to develop and                  Decompression
                                              would enable OSHA to: (1) Determine                      implement an effective qualification and                The proposed condition would
                                              that the safety and health instructions                  training program for affected workers.                require the applicant to consult with its
                                              and measures it specifies would be                       The proposed condition specifies the                  designated medical advisor regarding
                                              appropriate, would conform to the                        factors that an affected worker must                  special compression or decompression
                                              conditions of the variance, and would                    know to perform safely during                         procedures appropriate for any
                                              adequately protect the safety and health                 hyperbaric operations, including how to               unacclimated CAW. This proposed
                                              of CAWs; and (2) request the applicant                   enter, work in, and exit from hyperbaric              provision would ensure that the
                                              to revise or modify the HOM if it finds                  conditions under both normal and                      applicant consults with the medical
                                              that the hyperbaric safety and health                    emergency conditions. Having well-                    advisor, and involves the medical
                                              procedures are not suitable for the                      trained and qualified workers                         advisor in the evaluation, development,
                                              specific project and would not                           performing hyperbaric intervention                    and implementation of compression or
                                              adequately protect the safety and health                 work ensures that they recognize, and                 decompression protocols appropriate for
                                              of the CAWs. The applicant may not                       respond appropriately to, hyperbaric                  any CAW requiring acclimation to the
                                              begin hyperbaric interventions at                        safety and health hazards. These                      hyperbaric conditions encountered
                                              pressures exceeding 50 p.s.i.g. until                    qualification and training requirements               during EPBTBM operations.
                                              OSHA completes its review of the                         enable affected workers to cope                       Accordingly, CAWs requiring
                                              project-specific HOM and determines                      effectively with emergencies, as well as              acclimation would have an opportunity
                                              that the safety and health instructions                  the discomfort and physiological effects              to acclimate prior to exposure to these
                                              and measures it specifies would be                       of hyperbaric exposure, thereby                       hyperbaric conditions. OSHA believes
                                              appropriate, would conform to the                        preventing injury, illness, and fatalities.           this proposed condition would prevent
                                              conditions of the variance, and will                        Paragraph (2)(e) of this proposed                  or reduce adverse reactions among
                                              adequately protect the safety and health                 condition also would require the                      CAWs to the effects of compression or
                                              of the CAWs. OSHA will notify the                        applicant to provide affected workers                 decompression associated with the
                                              applicant that: (1) Its project-specific                 with information they can use to contact              intervention work they perform in the
                                              HOM was found to be acceptable; and                      the appropriate healthcare professionals              EPBTBM.
                                              (2) the applicant may begin hyperbaric                   if it is suspected that they are                      Proposed Condition J: Recordkeeping
                                              interventions at pressures exceeding 50                  developing hyperbaric-related health
                                              p.s.i.g. by complying fully with the                                                                             The proposed condition would
                                                                                                       effects. This requirement provides for
                                              conditions of the interim order or                                                                             require the applicant to maintain
                                                                                                       early intervention and treatment of DCI
                                              proposed permanent variance (if, or                                                                            records of specific factors associated
                                                                                                       and other health effects resulting from               with each hyperbaric intervention. The
                                              until the permanent variance is granted                  hyperbaric exposure, thereby reducing
                                              as an alternative to complying with the                                                                        information gathered and recorded
                                                                                                       the potential severity of these effects.              under this provision, in concert with the
                                              requirements of the standard).
                                                                                                       Proposed Condition H: Inspections,                    information provided under proposed
                                                Once approved, the project-specific                                                                          condition K (using OSHA 301 Incident
                                                                                                       Tests, and Accident Prevention
                                              HOM would become part of the                                                                                   Report form to investigate, record, and
                                              variance, thus enabling OSHA to                             The proposed condition would                       provide notice to OSHA of hyperbaric
                                              enforce its safety and health procedures                 require the applicant to develop,                     recordable injuries as defined by 29 CFR
                                              and measures.                                            implement, and operate a program of                   1904.4, 1904.7, 1904.8 through 1904.12),
                                                                                                       frequent and regular inspections of the               would enable the applicant and OSHA
                                              Proposed Condition F: Communication
                                                                                                       EPBTBM’s hyperbaric equipment and                     to determine the effectiveness of the
                                                 The proposed condition would                          support systems, and associated work                  permanent variance in preventing DCI
                                              require the applicant to develop and                     areas. This proposed condition would                  and other hyperbaric-related effects.8
                                              implement an effective system of                         help to ensure the safe operation and
                                                                                                       physical integrity of the equipment and               Proposed Condition K: Notifications
                                              information sharing and
                                              communication. Effective information                     work areas necessary to conduct                         Under the proposed condition, the
                                              sharing and communication ensures                        hyperbaric operations. The proposed                   applicant would be required, within
                                              that affected workers receive updated                    condition would also enhance worker                   specified periods, to notify OSHA of: (1)
                                              information regarding any safety-related                 safety by reducing the risk of                        Any recordable injury, illness, in-
                                              hazards and incidents, and corrective                    hyperbaric-related emergencies.                       patient hospitalization, amputation, loss
                                              actions taken, prior to the start of each                   Paragraph (3) of this proposed                     of an eye, or fatality that occurs as a
                                              shift. The proposed condition also                       condition would require the applicant                 result of hyperbaric exposures during
                                              requires the applicant to ensure that                    to document tests, inspections,                       EPBTBM operations; (2) provide OSHA
                                              reliable means of emergency                              corrective actions, and repairs involving             with a copy of the hyperbaric exposures
                                              communications are available and                         the EPBTBM, and maintain these                        incident investigation report (using
                                              maintained for affected workers and                      documents at the job site for the
                                                                                                                                                                8 See 29 CFR 1904 Recording and Reporting
                                              support personnel during hyperbaric                      duration of the job. This requirement
                                                                                                                                                             Occupational Injuries and Illnesses (http://
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                                              operations. Availability of such reliable                would provide the applicant with                      www.osha.gov/pls/oshaweb/owadisp.show_
                                              means of communications would enable                     information needed to schedule tests                  document?p_table=STANDARDS&p_id=9631);
                                              affected workers and support personnel                   and inspections to ensure the continued               recordkeeping forms and instructions (http://
                                              to respond quickly and effectively to                    safe operation of the equipment and                   www.osha.gov/recordkeeping/RKform300pkg-
                                                                                                                                                             fillable-enabled.pdf); and updates to OSHA’s
                                              hazardous conditions or emergencies                      systems, and to determine that the                    recordkeeping rule and Web page ((79 FR 56130);
                                              that may develop during EPBTBM                           actions taken to correct defects in                   http://www.osha.gov/recordkeeping2014/
                                              operations.                                              hyperbaric equipment and systems were                 index.html).



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                                                                              Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices                                            44393

                                              OSHA 301 form) of these events within                    main office, or transfers the operations              alternative measures include use of
                                              24 hours of the incident; (3) include on                 covered by the proposed permanent                     engineering and administrative controls
                                              the 301 form information on the                          variance to a successor company. In                   of the hazards associated with work
                                              hyperbaric conditions associated with                    addition, the condition specifies that                performed in compressed-air conditions
                                              the recordable injury or illness, the root-              OSHA must approve the transfer of the                 exceeding 50 p.s.i.g. while engaged in
                                              cause determination, and preventive                      permanent variance to a successor                     the construction of a subaqueous tunnel
                                              and corrective actions identified and                    company. These requirements would                     using advanced shielded mechanical-
                                              implemented; (4) provide its                             allow OSHA to communicate effectively                 excavation techniques in conjunction
                                              certification that it informed affected                  with the applicant regarding the status               with an EPBTBM. Prior to conducting
                                              workers of the incident and the results                  of the proposed permanent variance,                   interventions in the EPBTBM’s
                                              of the incident investigation; (5) notify                and expedite the Agency’s                             pressurized working chamber, the
                                              the Office of Technical Programs and                     administration and enforcement of the                 applicant halts tunnel excavation and
                                              Coordination Activities (OTPCA) and                      permanent variance. Stipulating that an               prepares the machine and crew to
                                              the OSHA Area Office closest to the                      applicant would be required to have                   conduct the interventions. Interventions
                                              tunnel project site within 15 working                    OSHA’s approval to transfer a variance                involve inspection, maintenance, or
                                              days should the applicant need to revise                 to a successor company would provide                  repair of the mechanical-excavation
                                              its HOM to accommodate changes in its                    assurance that the successor company                  components located in the working
                                              compressed-air operations that affect its                has knowledge of, and will comply                     chamber.
                                              ability to comply with the conditions of                 with, the conditions specified by                        B. Traylor developed, and proposed to
                                              the proposed permanent variance; and                     proposed permanent variance, thereby                  implement, safe hyperbaric work
                                              (6) provide OTPCA and the OSHA Area                      ensuring the safety of workers involved               procedures, emergency and contingency
                                              Office closest to the tunnel project site,               in performing the operations covered by               procedures, and medical examinations
                                              at the end of the project, with a report                 the proposed permanent variance.                      for future tunneling projects’ CAWs.
                                              evaluating the effectiveness of the                                                                            The applicant will compile these
                                                                                                       IV. Grant of Interim Order                            standard operating procedures into a
                                              decompression tables.
                                                 It should be noted that the                              As noted earlier, the applicant                    project-specific HOM. The HOM will
                                              requirement of completing and                            requested an interim order. Based on                  discuss the procedures and personnel
                                              submitting the hyperbaric exposure-                      Traylor’s assertions in its application,              qualifications for performing work
                                              related (recordable) incident                            the interim order addresses CAWs                      safely during the compression and
                                              investigation report (OSHA 301 form)                     performing interventions in hyperbaric                decompression phases of interventions.
                                              would be more restrictive than the                       conditions exceeding 50 p.s.i.g. that                 The HOM will also specify the
                                              current recordkeeping requirement of                     involve proposed use of the 1992                      decompression tables the applicant
                                              completing the OSHA 301 form within                      French Decompression Tables for air,                  proposes to use. Depending on the
                                              7 calendar days of the incident                          nitrox, or trimix as specified by the                 maximum working pressure and
                                              (1904.29(b)(3)). This modified and more                  HOM for staged decompression with                     exposure times during the interventions,
                                              stringent incident investigation and                     pressures ranging from 58 to 75 p.s.i.g.              the tables provide for decompression
                                              reporting requirement would be                           During the period starting with the                   using the 1992 French Decompression
                                              restricted to intervention-related                       publication of this notice until the                  Tables for air, nitrox, or trimix as
                                              hyperbaric (recordable) incidents only.                  Agency modifies or revokes the interim                specified by the HOM. The
                                              Providing notification would be                          order or makes a decision on its                      decompression tables also include
                                              essential because time is a critical                     application for a permanent variance,                 delays or stops for various time intervals
                                              element in OSHA’s ability to determine                   the applicant is required to comply fully             at different pressure levels during the
                                              the continued effectiveness of the                       with the conditions of the interim order              transition to atmospheric pressure (i.e.,
                                              variance conditions in preventing                        (as an alternative to complying with the              staged decompression). In all cases, a
                                              hyperbaric incidents, and the                            requirements of 29 CFR 1926.803                       physician certified in hyperbaric
                                              applicant’s identification and                           (hereafter, ‘‘the standard’’)) that:                  medicine will manage the medical
                                              implementation of appropriate                               A. Prohibit employers using                        condition of CAWs during
                                              corrective and preventive actions.                       compressed air under hyperbaric                       decompression. In addition, a trained
                                                 Further, these notification                           conditions from subjecting workers to                 and experienced man-lock attendant,
                                              requirements also would enable the                       pressure exceeding 50 p.s.i.g., except in             experienced in recognizing
                                              applicant, its employees, and OSHA to                    an emergency (29 CFR 1926.803(e)(5));                 decompression sickness or illnesses and
                                              determine the effectiveness of the                          B. Require the use of decompression                injuries will be present. Of key
                                              permanent variance in providing the                      values specified by the decompression                 importance, a hyperbaric supervisor
                                              requisite level of safety to the                         tables in Appendix A of the                           (competent person), trained in
                                              applicant’s workers and, based on this                   compressed-air standard (29 CFR                       hyperbaric operations, procedures, and
                                              determination, whether to revise or                      1926.803(f)(1)); and                                  safety, will directly supervise all
                                              revoke the conditions of the proposed                       C. Require the use of automated                    hyperbaric operations to ensure
                                              permanent variance. Timely notification                  operational controls and a special                    compliance with the procedures
                                              would permit OSHA to take whatever                       decompression chamber (29 CFR                         delineated in the project-specific HOM
                                              action may be necessary and                              1926.803(g)(1)(iii) and .803(g)(1)(xvii),             or by the attending physician.
                                              appropriate to prevent further injuries                  respectively).                                           C. Traylor developed, and proposed to
                                              and illnesses. Providing notification to                    After reviewing the proposed                       implement, a training program to
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                                              employees would inform them of the                       alternatives OSHA preliminarily                       instruct affected workers in the hazards
                                              precautions taken by the applicant to                    determined that:                                      associated with conducting hyperbaric
                                              prevent similar incidents in the future.                    A. Traylor developed, and proposed                 operations.
                                                 Additionally, this proposed condition                 to implement, effective alternative                      D. Traylor developed, and proposed
                                              also would require the applicant to                      measures to the prohibition of using                  to implement, an effective alternative to
                                              notify OSHA if it ceases to do business,                 compressed air under hyperbaric                       the use of automatic controllers that
                                              has a new address or location for its                    conditions exceeding 50 p.s.i.g. The                  continuously decrease pressure to


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                                              44394                           Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                              achieve decompression in accordance                        The review conducted by OSHA                          air atmospheres greater than 73 p.s.i.g.,
                                              with the tables specified by the                         focused on the use of the 1992 French                   it becomes increasingly more difficult to
                                              standard. The alternative includes                       Decompression Tables with air, nitrox,                  work due to increased breathing
                                              using: (1) The 1992 French                               or trimix and found several research                    resistance, increased risk of DCI, and the
                                              Decompression Tables for guiding                         studies supporting the determination                    adverse effects of the increased partial
                                              staged decompression to achieve lower                    that such use resulted in a lower rate of               pressures of nitrogen and oxygen.
                                              occurrences of DCI; (2) decompression                    DCI than the decompression tables                       Nitrogen narcosis occurs when a diver
                                              protocols of air, nitrox, or trimix again                specified by the standard. For example,                 or CAW breathes a gas mixture with a
                                              to achieve lower occurrences of DCI; (3)                 H. L. Anderson studied the occurrence                   nitrogen partial pressure greater than
                                              a trained and competent attendant for                    of DCI at maximum hyperbaric                            2.54 ATA (i.e., 73 p.s.i.g.). Nitrogen
                                              implementing appropriate hyperbaric                      pressures ranging from 4 p.s.i.g. to 43                 narcosis compromises judgment,
                                              entry and exit procedures, and (4) a                     p.s.i.g. during construction of the Great               performance, and reaction time of divers
                                              competent hyperbaric supervisor and                      Belt Tunnel in Denmark (1992–1996); 13                  and CAWs and can lead to loss of
                                              attending physician certified in                         this project used the 1992 French                       consciousness.15 There is concern that
                                              hyperbaric medicine, to oversee all                      Decompression Tables to decompress                      nitrogen narcosis may impair CAWs
                                              hyperbaric operations.                                   the workers during part of the                          leading to possible safety issues.16
                                                 E. Traylor developed, and proposed to                 construction. Anderson observed 6                       Exposure to oxygen at partial pressures
                                              implement, an effective alternative to                   decompression sickness (DCS) cases out                  greater than normal daily living may be
                                              the use of the special decompression                     of 7,220 decompression events, and                      toxic to the lungs and central nervous
                                              chamber required by the standard.                        reported that switching to the 1992                     system under certain conditions. The
                                              EPBTBM technology permits the                            French Decompression tables reduced                     higher the partial pressure of oxygen
                                              tunnel’s work areas to be at atmospheric                 the DCI incidence to 0.08%. The DCI                     and the longer the exposure, the more
                                              pressure, with only the face of the                      incidence in the study by H. L.                         severe the toxic effects. One way to
                                              EPBTBM (i.e., the working chamber) at                    Andersen is substantially less than the                 reduce oxygen exposure is to alter the
                                              elevated pressure during interventions.                  DCI incidence reported for the                          percentage of oxygen in the breathing
                                              The applicant would limit interventions                  decompression tables specified in                       mixture (see footnote 15). Trimix is a
                                              conducted in the working chamber to                      Appendix A. OSHA found no studies in                    mixture of the inert gas helium, oxygen
                                              performing required inspection,                          which the DCI incidence reported for                    and nitrogen. Because helium is less
                                              maintenance, and repair of the cutting                   the 1992 French Decompression Tables                    dense than air, use of helium in
                                              tools on the face of the EPBTBM. The                     were higher than the DCI incidence                      compressed atmospheres decreases
                                              EPBTBM’s man lock and working                            reported for the OSHA decompression                     breathing resistance and allows for
                                              chamber provide sufficient space for the                 tables, nor did OSHA find any studies                   adjustment of the partial pressures of
                                              maximum crew of three CAWs to stand                      indicating that the 1992 French                         oxygen and nitrogen to reduce the
                                              up and move around, and safely                           Decompression Tables were more                          incidence of nitrogen narcosis and
                                              accommodate decompression times up                       hazardous to employees than the OSHA                    oxygen toxicity.
                                              to 360 minutes. Therefore, OSHA                          decompression tables.14                                    Trimix has been successfully used in
                                              preliminarily determined that the                          OSHA also reviewed the use of trimix                  deep caisson work and tunneling
                                              EPBTBM’s man lock and working                            in tunneling operations. In compressed-                 projects including the construction of
                                              chamber function as effectively as the                                                                           the Meiko West Bridge,17 the Western
                                                                                                       exposures between 19 and 31 p.s.i.g. over a 51-week     Scheldt Tunnel (see footnote 16), and in
                                              special decompression chamber                            contract period, for a DCI incidence of 1.44% for       the Seattle Brightwater Tunneling
                                              required by the standard.                                the decompression tables specified by the OSHA
                                                                                                       standard.                                               Project.18 During the construction of the
                                                 OSHA conducted a review of the
                                                                                                         11 Sealey, JL (1969). Safe exit from the hyperbaric   Western Scheldt Tunnel, there were
                                              scientific literature regarding
                                                                                                       environment: Medical experience with pressurized        fewer reported cases of DCIs in CAWs
                                              decompression to determine whether                       tunnel operations. Journal of Occupational              using trimix than in other CAWs using
                                              the alternative decompression method                     Medicine, 11(5), pp. 273–275. This article reported
                                                                                                       210 treated cases of DCI among 38,600 hyperbaric
                                                                                                                                                               just compressed air, despite working at
                                              (i.e., the 1992 French Decompression
                                                                                                       exposures between 13 and 34 p.s.i.g. over a 32-         higher pressures (see footnotes 16 and
                                              Tables) Traylor proposed would provide                   month period, for an incidence of 0.54% for the         17). Additionally, the use of compressed
                                              a workplace as safe and healthful as that                decompression tables specified by the Washington        air during the construction of the
                                              provided by the standard. Based on this                  State safety standards for compressed-air work,
                                                                                                                                                               Western Scheldt Tunnel was also
                                              review, OSHA determined that                             which are similar to the tables in the OSHA
                                                                                                       standard. Moreover, the article reported 51 treated
                                              tunneling operations performed with                      cases of DCI for 3,000 exposures between 30 and 34         15 United States Navy. (2011) U.S. Navy Diving
                                              these tables 9 resulted in a lower                       p.s.i.g., for an incidence of 1.7% for the Washington   Manual, Revision 6. Department of the Navy.
                                              occurrence of DCI than the                               State tables.                                              16 Van Rees, Vellinga T, Verhoevan A, Jan Dijk F,
                                                                                                         12 In 1985, the National Institute for Occupational
                                              decompression tables specified by the                                                                            Sterk W (November-December 2006) Health and
                                                                                                       Safety and Health (NIOSH) published a report            efficiency in trimix versus air breathing in CAWs.
                                              standard.10 11 12                                        entitled ‘‘Criteria for Interim Decompression Tables    Undersea Hyperbaric Medicine 33 (6), pp 419–427.
                                                                                                       for Caisson and Tunnel Workers;’’ this report           This article reported that during construction of the
                                                9 In 1992, the French Ministry of Labour replaced      reviewed studies of DCI and other hyperbaric-           Western Scheldt Tunneling Project, there were 52
                                              the 1974 French Decompression Tables with the            related injuries resulting from use of OSHA’s tables.   exposures to trimix at 81.2–84.1 p.s.i. with no
                                              1992 French Decompression Tables, which differ           This report is available on NIOSH’s Web site:           reported cases of DCI. Three of 318 exposures to
                                              from OSHA’s decompression tables in Appendix A           http://www.cdc.gov/niosh/topics/decompression/          compressed air resulted in DCI in this study.
                                              by using: (1) Staged decompression as opposed to         default.html.                                              17 Takishima R, Sterk W, Nashimoto T (1996)
                                              continuous (linear) decompression; (2)                     13 Anderson HL (2002). Decompression sickness         Trimix breathing in deep caisson work for the
                                              decompression tables based on air or both air and        during construction of the Great Belt Tunnel,           construction of Pier (P2) for the Meiko West Bridge.
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                                              pure oxygen; and (3) emergency tables when               Denmark. Undersea and Hyperbaric Medicine,              Undersea and Hyperbaric Medical Society Meeting
                                              unexpected exposure times occur (up to 30 minutes        29(3), pp. 172–188.                                     Abstract. During construction of the Meiko West
                                              above the maximum allowed working time).                   14 Le Péchon JC, Barre P, Baud JP, Ollivier F        Bridge, there were 11 cases of DCI in 2059 trimix
                                                10 Kindwall, EP (1997). Compressed-air tunneling       (September 1996). Compressed-air work—French            exposures for a reported DCI rate of 1%.
                                              and caisson work decompression procedures:               Tables 1992—operational results. JCLP Hyperbarie           18 Hamilton R, Kay E (November 2008) Boring

                                              Development, problems, and solutions. Undersea           Paris, Centre Medical Subaquatique Interentreprise,     deep tunnels. Proceedings, 3rd of U.S.-Japan Panel
                                              and Hyperbaric Medicine, 24(4), pp. 337–345. This        Marseille: Communication a l’EUBS, pp. 1–5 (see         on Aerospace-Diving Physiology and Technology,
                                              article reported 60 treated cases of DCI among 4,168     Ex. OSHA–2012–0036–0005).                               and Hyperbaric Medicine.



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                                                                              Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices                                              44395

                                              associated with a slower working pace                    period starting with the grant of the                   revokes this interim order or grants
                                              and operational errors that the authors                  interim order until the Agency modifies                 Traylor’s request for a permanent
                                              associated with the adverse effects of                   or revokes the interim order or makes a                 variance in accordance with 29 CFR
                                              nitrogen at high pressure ((i.e., nitrogen               decision on its application for a                       1905.13.
                                              narcosis) (see footnote 16)). Trimix                     permanent variance); (2) comply fully
                                                                                                                                                               B. Application
                                              decompression tables are proprietary so                  with the specific conditions of the
                                              large studies of workers with specific                   variance, if granted; (3) comply fully                    The permanent variance would apply
                                              pressure exposure for specific trimix                    with all other applicable provisions of                 only when Traylor stops the tunnel-
                                              schedules are not available. Additional                  29 CFR part 1926; and (4) provide a                     boring work, pressurizes the working
                                              concerns include the lack of a defined                   copy of this Federal Register notice to                 chamber, and the CAWs either enter the
                                              recompression protocol in the case of                    all employees affected by the proposed                  working chamber to perform
                                              DCI and some studies have found                          conditions, including the affected                      interventions (i.e., inspect, maintain, or
                                              evidence of cardiopulmonary strain in                    employees of other employers, using the                 repair the mechanical-excavation
                                              divers using trimix but at pressures                     same means it used to inform these                      components), or exit the working
                                              greater than those submitted for this                    employees of its application for a                      chamber after performing interventions.
                                              variance (see footnote 15).                              permanent variance.
                                                 Review of the literature and reports                                                                          C. List of Abbreviations
                                              from presentations to professional                       V. Specific Conditions of the Interim
                                              societies support that the incidence of                  Order and the Application for a                           Abbreviations used throughout this
                                              DCI with this technique is lower than                    Permanent Variance                                      proposed permanent variance would
                                              the incidence of DCIs reported with the                     The following conditions apply to the                include the following:
                                              use of OSHA tables. In addition, use of                  interim order OSHA is granting to                       1. ATA—Atmosphere Absolute
                                              trimix reduces the risk of impairment                    Traylor. These conditions specify the                   2. CAW—Compressed-air worker
                                              from nitrogen narcosis and allows for                    alternative means of compliance with                    3. CFR—Code of Federal Regulations
                                              the adjustment of oxygen partial                         the requirements of paragraphs 29 CFR                   4. DCI—Decompression Illness
                                              pressure to reduce exposure to elevated                  1926.803(e)(5), (f)(1), (g)(1)(iii), and                5. DCS—Decompression Sickness (or the
                                                                                                                                                                  bends)
                                              oxygen partial pressures (see footnotes                  (g)(1)(xvii). In addition, these conditions             6. EPBTBM—Earth Pressure Balanced Tunnel
                                              16 and 18). Therefore, OSHA                              are the conditions that specify the                        Boring Machine
                                              preliminarily concludes that the                         alternative means of compliance with                    7. HOM—Hyperbaric Operations and Safety
                                              proposed use of the 1992 French                          the requirements of paragraphs 29 CFR                      Manual
                                              Decompression Tables would protect                       1926.803(e)(5), (f)(1), (g)(1)(iii), and                8. JHA—Job hazard analysis
                                              workers at least as effectively as the                   (g)(1)(xvii) that OSHA is proposing for                 9. OSHA—Occupational Safety and Health
                                              OSHA decompression tables.                               Traylor’s permanent variance. The                          Administration
                                                 Based on a review of available                        conditions/proposed conditions would                    10. OTPCA—Office of Technical Programs
                                              evidence, the experience of State Plans                  apply to all employees of Traylor                          and Coordination Activities
                                              that either granted variances (Nevada,                   exposed to hyperbaric conditions. These
                                              Oregon, and Washington) 19 or                                                                                    D. Definitions
                                                                                                       conditions/proposed conditions would
                                              promulgated a new standard                               be: 21                                                     The following definitions would
                                              (California) 20 for hyperbaric exposures                                                                         apply to this proposed permanent
                                              occurring during similar subaqueous                      A. Scope
                                                                                                                                                               variance. These definitions would
                                              tunnel-construction work, and the                           The permanent variance would apply                   supplement the definitions in each
                                              information provided in the applicant’s                  only to work:                                           project-specific HOM.
                                              variance application, OSHA is granting                      1. That occurs in conjunction with
                                              an interim order for future tunneling                    construction of future subaqueous                          1. Affected employee or worker—an
                                              projects and announces the application                   tunnels using advanced shielded                         employee or worker who is affected by
                                              for the permanent variance.                              mechanical-excavation techniques and                    the conditions of this proposed
                                                 Under section 6(d) of the                             involving operation of an EPBTBM;                       permanent variance, or any one of his or
                                              Occupational Safety and Health Act of                       2. Performed under compressed-air                    her authorized representatives. The term
                                              1970 (29 U.S.C. 655(d)), and based on                    and hyperbaric conditions up to 75                      ‘‘employee’’ has the meaning defined
                                              the record discussed above, the Agency                   p.s.i.g;                                                and used under the Occupational Safety
                                              preliminarily finds that when the                           3. In the EPBTBM’s forward section                   and Health Act of 1970 (29 U.S.C. 651
                                              employer complies with the conditions                    (the working chamber) and associated                    et seq.).
                                              of the proposed variance, the working                    hyperbaric chambers used to pressurize                     2. Atmospheric pressure—the
                                              conditions of the employer’s workers                     and decompress employees entering and                   pressure of air at sea-level, generally,
                                              would be at least as safe and healthful                  exiting the working chamber;                            14.7 p.s.i.a., 1 atmosphere absolute, or 0
                                              as if the employer complied with the                        4. Except for the requirements                       p.s.i.g.
                                              working conditions specified by                          specified by 29 CFR 1926.803(e)(5),
                                                                                                       (f)(1), (g)(1)(iii), and (g)(1)(xvii), Traylor             3. Compressed-air worker—an
                                              paragraphs (e)(5), (f)(1), (g)(1)(iii), and                                                                      individual who is specially trained and
                                              (g)(1)(xvii) of 29 CFR 1926.803.                         would be required to comply fully with
                                                                                                       all other applicable provisions of 29                   medically qualified to perform work in
                                              Therefore, Traylor will: (1) Comply with                                                                         a pressurized environment while
                                              the conditions listed in the future                      CFR part 1926; and
                                                                                                          5. The interim order granted to                      breathing air at pressures up to 75
                                              tunnel projects interim order for the                                                                            p.s.i.g.
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                                                                                                       Traylor for future tunnel projects will
                                                19 These state variances are available in the          remain in effect until OSHA modifies or                    4. Competent person—an individual
                                              docket: Exs. OSHA–2012–0035–0006 (Nevada),                                                                       who is capable of identifying existing
                                              OSHA–2012–0035–0007 (Oregon), and OSHA–                    21 In these conditions, OSHA is using the future      and predictable hazards in the
                                              2012–0035–0008 (Washington).                             conditional form of the verb (e.g., ‘‘would’’), which   surroundings or working conditions that
                                                20 See California Code of Regulations, Title 8,        pertains to the application for a permanent variance
                                              Subchapter 7, Group 26, Article 154, available at        (designated as ‘‘permanent variance’’) but the
                                                                                                                                                               are unsanitary, hazardous, or dangerous
                                              http://www.dir.ca.gov/title8/sb7g26a154.html.            conditions also apply to the interim order.             to employees, and who has


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                                              44396                           Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                              authorization to take prompt corrective                    12. Man lock—an enclosed space                            2. The HOM would be required to
                                              measures to eliminate them.22                            capable of pressurization, and used for                  demonstrate that the EPBTBM to be
                                                 5. Decompression illness—an illness                   compressing or decompressing any                         used on the project is designed,
                                              (also called decompression sickness                      employee or material when either is                      fabricated, inspected, tested, marked,
                                              (DCS) or the bends) caused by gas                        passing into or out of a working                         and stamped in accordance with the
                                              bubbles appearing in body                                chamber.                                                 requirements of ASME PVHO–1.2012
                                              compartments due to a reduction in                         13. Nitrox—a mixture of oxygen and                     (or most recent edition of Safety
                                              ambient pressure. Examples of                            air and refers to mixtures which are                     Standards for Pressure Vessels for
                                              symptoms of decompression illness                        more than 21% oxygen.                                    Human Occupancy) for the EPBTBM’s
                                              include (but are not limited to): Joint                    14. Pressure—a force acting on a unit                  hyperbaric chambers.
                                              pain (also known as the ‘bends’ for                      area. Usually expressed as pounds per                       3. When submitting the project-
                                              agonizing pain or the ‘niggles’ for slight               square inch (p.s.i.).                                    specific HOM to OSHA for approval,
                                              pain); areas of bone destruction (termed                   15. p.s.i.—pounds per square inch, a                   Traylor must demonstrate that it
                                              dysbaric osteonecrosis); skin disorders                  common unit of measurement of                            informed its employees of the proposed
                                              (such as cutis marmorata, which causes                   pressure; a pressure given in p.s.i.                     HOM and their right to petition the
                                              a pink marbling of the skin); spinal cord                corresponds to absolute pressure.                        Assistant Secretary for a variance by:
                                              and brain disorders (such as stroke,                       16. p.s.i.a—pounds per square inch                        a. giving a copy of the proposed
                                              paralysis, paresthesia, and bladder                      absolute, or absolute pressure, is the                   project-specific HOM to the authorized
                                              dysfunction); cardiopulmonary                            sum of the atmospheric pressure and                      employee representatives;
                                              disorders, such as shortness of breath;                                                                              b. posting a statement giving a
                                                                                                       gauge pressure. At sea-level,
                                              and arterial gas embolism (gas bubbles                                                                            summary of the proposed project-
                                                                                                       atmospheric pressure is approximately
                                              in the arteries that block blood flow).23                                                                         specific HOM and specifying where its
                                                                                                       14.7 p.s.i. Adding 14.7 to a pressure
                                                                                                                                                                employees may examine a copy of the
                                                 Note: Health effects associated with                  expressed in units of p.s.i.g. will yield
                                                                                                                                                                permanent variance application (at the
                                              hyperbaric intervention but not considered               the absolute pressure, expressed as
                                                                                                                                                                place(s) where the applicant normally
                                              symptoms of DCI can include: Barotrauma                  p.s.i.a.
                                              (direct damage to air-containing cavities in                                                                      posts notices to employees or, instead of
                                                                                                         17. p.s.i.g.—pounds per square inch
                                              the body such as ears, sinuses and lungs);                                                                        a summary, posting the application
                                                                                                       gauge, a common unit of pressure;
                                              nitrogen narcosis (reversible alteration in                                                                       itself); or
                                                                                                       pressure expressed as p.s.i.g.                              c. using other appropriate means.
                                              consciousness that may occur in hyperbaric
                                              environments and is caused by the anesthetic
                                                                                                       corresponds to pressure relative to                         4. Traylor may not begin hyperbaric
                                              effect of certain gases at high pressure); and           atmospheric pressure. At sea-level,                      interventions at pressures exceeding 50
                                              oxygen toxicity (a central nervous system                atmospheric pressure is approximately                    p.s.i.g. until OSHA completes its review
                                              condition resulting from the harmful effects             14.7 p.s.i. Subtracting 14.7 from a                      of the project-specific HOM and
                                              of breathing molecular oxygen (O2) at                    pressure expressed in units of p.s.i.a.                  determines that the safety and health
                                              elevated partial pressures).                             yields the gauge pressure, expressed as                  instructions and measures it specifies
                                                6. Earth Pressure Balanced Tunnel                      p.s.i.g.                                                 would be appropriate, would comply
                                              Boring Machine—the machinery used to                       18. Qualified person—an individual                     with the conditions of the variance, and
                                              excavate the tunnel.                                     who, by possession of a recognized                       would adequately protect the safety and
                                                7. Hot work—any activity performed                     degree, certificate, or professional                     health of CAWs. Traylor would have to
                                              in a hazardous location that may                         standing, or who, by extensive                           receive a written acknowledgement
                                              introduce an ignition source into a                      knowledge, training, and experience,                     from OSHA stating that: (1) OSHA
                                              potentially flammable atmosphere.24                      successfully demonstrates an ability to                  found its project-specific HOM
                                                8. Hyperbaric—at a higher pressure                     solve or resolve problems relating to the                acceptable; and (2) OSHA determined
                                              than atmospheric pressure.                               subject matter, the work, or the                         that it may begin hyperbaric
                                                9. Hyperbaric intervention—a term                      project.25                                               interventions at pressures exceeding 50
                                              that describes the process of stopping                     19. Trimix—a mixture of oxygen,                        p.s.i.g. by complying fully with the
                                              the EPBTBM and preparing and                             nitrogen and helium that is used in                      conditions of the interim order or
                                              executing work under hyperbaric                          hyperbaric environments instead of air                   proposed permanent variance (as an
                                              pressure in the working chamber for the                  to reduce nitrogen narcosis and the                      alternative to complying with the
                                              purpose of inspecting, replacing, or                     hazards of oxygen toxicity.                              requirements of the standard). Once
                                              repairing cutting tools and/or the                         20. Working chamber—an enclosed                        approved by OSHA, the HOM would
                                              cutterhead structure.                                    space in the EPBTBM in which CAWs                        become part of this variance for the
                                                10. Hyperbaric Operations Manual—a                     perform interventions, and which is                      purposes of the project for which it was
                                              detailed, project-specific health and                    accessible only through a man lock.                      developed.
                                              safety plan developed and implemented                    E. Safety and Health Practices                              5. Traylor would have to implement
                                              by Traylor for working in compressed                                                                              the safety and health instructions
                                              air during future hyperbaric tunnel                        1. Traylor would have to develop and                   included in the manufacturer’s
                                              projects.                                                implement a project-specific HOM, and                    operations manuals for the EPBTBM,
                                                11. Job hazard analysis—an                             submit the HOM to OSHA at least one                      and the safety and health instructions
                                              evaluation of tasks or operations to                     year before using the EPBTBM on the                      provided by the manufacturer for the
                                              identify potential hazards and to                        project for which the HOM applies. The                   operation of decompression equipment.
                                              determine the necessary controls.                        HOM would provide the governing                             6. Traylor would have to use air or
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                                                                                                       requirements regarding expected safety                   trimix as the only breathing gas in the
                                                22 Adapted  from 29 CFR 1926.32(f).                    and health hazards (including                            working chamber.
                                                23 See Appendix 10 of ‘‘A Guide to the Work in         anticipated geological conditions) and                      7. Traylor would have to use the 1992
                                              Compressed-Air Regulations 1996,’’ published by          hyperbaric exposures during the tunnel-                  French Decompression Tables for air,
                                              the United Kingdom Health and Safety Executive
                                              available from NIOSH at http://www.cdc.gov/niosh/
                                                                                                       construction project.                                    nitrox, and trimix decompression
                                              docket/archive/pdfs/NIOSH-254/compReg1996.pdf.                                                                    specified in the HOM, specifically, the
                                                24 Also see 29 CFR 1910.146(b).                             25 Adapted   from 29 CFR 1926.32(m).                extracted portions of the 1992 French


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                                                                              Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices                                               44397

                                              Decompression tables titled, ‘‘French                    communication among affected workers                  regular inspections of the EPBTBM’s
                                              Regulation Air Standard Tables.’’                        and support personnel in hyperbaric                   hyperbaric equipment and support
                                                 8. Traylor would have to equip man                    conditions where unassisted voice                     systems (such as temperature control,
                                              locks used by its employees with an air,                 communication is inadequate.                          illumination, ventilation, and fire-
                                              nitrox, or trimix-delivery system as                       a. Traylor would have to use an                     prevention and fire-suppression
                                              specified by the HOM approved by                         independent power supply for powered                  systems), and hyperbaric work areas, as
                                              OSHA for the project. Traylor would be                   communication systems, and these                      required under 29 CFR 1926.20(b)(2) by:
                                              required to not store oxygen or other                    systems would have to operate such that                  a. Developing a set of checklists to be
                                              compressed gases used in conjunction                     use or disruption of any one phone or                 used by a competent person in
                                              with hyperbaric work in the tunnel.                      signal location will not disrupt the                  conducting weekly inspections of
                                                 9. Workers performing hot work                        operation of the system from any other                hyperbaric equipment and work areas;
                                              under hyperbaric conditions would                        location.                                             and
                                              have to use flame-retardant personal                       b. Traylor would have to test                          b. Ensuring that a competent person
                                              protective equipment and clothing.                       communication systems at the start of                 conducts daily visual checks and
                                                 10. In hyperbaric work areas, Traylor                 each shift and as necessary thereafter to             weekly inspections of the EPBTBM.
                                              would have to maintain an adequate                       ensure proper operation.                                 2. If the competent person determines
                                              fire-suppression system approved for                                                                           that the equipment constitutes a safety
                                              hyperbaric work areas.                                   G. Worker Qualifications and Training                 hazard, Traylor would have to remove
                                                 11. Traylor would have to develop                        Traylor would have to:                             the equipment from service until it
                                              and implement one or more JHAs for                          1. Ensure that each affected worker                corrects the hazardous condition and
                                              work in the hyperbaric work areas, and                   receives effective training on how to                 has the correction approved by a
                                              review, periodically and as necessary                    safely enter, work in, exit from, and                 qualified person.
                                              (e.g., after making changes to a planned                 undertake emergency evacuation or                        3. Traylor would have to maintain
                                              intervention that affects its operation),                rescue from, hyperbaric conditions, and               records of all tests and inspections of
                                              the contents of the JHAs with affected                   document this training.                               the EPBTBM, as well as associated
                                              employees. The JHAs would have to                           2. Provide effective instruction, before           corrective actions and repairs, at the job
                                              include all the job functions that the                   beginning hyperbaric operations, to                   site for the duration of the job.
                                              risk assessment 26 indicates are essential               each worker who performs work, or
                                              to prevent injury or illness.                                                                                  I. Compression and Decompression
                                                                                                       controls the exposure of others, in
                                                 12. Traylor would have to develop a                   hyperbaric conditions, and document                      Traylor would have to consult with its
                                              set of checklists to guide compressed-air                this instruction. The instruction would               attending physician concerning the
                                              work and ensure that employees follow                    include:                                              need for special compression or
                                              the procedures required by this                             a. The physics and physiology of                   decompression exposures appropriate
                                              proposed permanent variance                              hyperbaric work;                                      for CAWs not acclimated to hyperbaric
                                              (including all procedures required by                       b. Recognition of pressure-related                 exposure.
                                              the HOM approved by OSHA for the                         injuries;
                                              project, which this proposed variance                                                                          J. Recordkeeping
                                                                                                          c. Information on the causes and
                                              would incorporate by reference). The                     recognition of the signs and symptoms                    Traylor would have to maintain a
                                              checklists would have to include all                     associated with decompression illness,                record of any recordable injury, illness,
                                              steps and equipment functions that the                   and other hyperbaric intervention-                    in-patient hospitalization, amputation,
                                              risk assessment indicates are essential to               related health effects (e.g., barotrauma,             loss of an eye, or fatality (as defined by
                                              prevent injury or illness during                         nitrogen narcosis, and oxygen toxicity).              29 CFR part 1904 Recording and
                                              compressed-air work.                                        d. How to avoid discomfort during                  Reporting Occupational Injuries and
                                                 13. Traylor would have to ensure that                 compression and decompression;                        Illnesses), resulting from exposure of an
                                              the safety and health provisions of each                    e. Information the workers can use to              employee to hyperbaric conditions by
                                              HOM adequately protect the workers of                    contact the appropriate healthcare                    completing the OSHA 301 Incident
                                              all contractors and subcontractors                       professionals should the workers have                 Report form and OSHA 300 Log of Work
                                              involved in hyperbaric operations for                    concerns that they may be experiencing                Related Injuries and Illnesses.
                                              the project to which the HOM applies.27                  adverse health effects from hyperbaric                  Note: Examples of important information
                                              F. Communication                                         exposure; and                                         to include on the OSHA 301 Incident Report
                                                                                                          f. Procedures and requirements                     form (along with the corresponding question
                                                 1. Prior to beginning a shift, Traylor                                                                      on the form) would have to address the
                                                                                                       applicable to the employee in the
                                              would have to implement a system that                                                                          following: the task performed (Question (Q)
                                                                                                       project-specific HOM.
                                              informs workers exposed to hyperbaric                                                                          14); an estimate of the CAW’s workload (Q
                                                                                                          3. Repeat the instruction specified in
                                              conditions of any hazardous                                                                                    14); the composition of the gas mixture (e.g.,
                                                                                                       paragraph (G)(2) of this proposed
                                              occurrences or conditions that might                                                                           air or trimix (Q 14)); the pressure worked at
                                                                                                       condition periodically and as necessary               (Q 14); temperature in the work and
                                              affect their safety, including hyperbaric
                                                                                                       (e.g., after making changes to its                    decompression environments (Q 14); did
                                              incidents, gas releases, equipment
                                                                                                       hyperbaric operations).                               something unusual occur during the task or
                                              failures, earth or rock slides, cave-ins,
                                                                                                          4. When conducting training for its                decompression (Q 14); time of symptom
                                              flooding, fires, or explosions.
                                                 2. Traylor would have to provide a                    hyperbaric workers, make this training                onset (Q 15); duration of time between
                                                                                                       available to OSHA personnel and notify                decompression and onset of symptoms (Q
                                              power-assisted means of                                                                                        15); nature and duration of symptoms (Q 16);
                                                                                                       the OTPCA at OSHA’s National Office
                                                                                                                                                             a medical summary of the illness or injury (Q
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                                                26 See ANSI/AIHA Z10–2012, American National           and OSHA’s nearest affected Area Office
                                                                                                                                                             16); duration of the hyperbaric intervention
                                              Standard for Occupational Health and Safety              before the training takes place.                      (Q 17); any possible contributing factors (Q
                                              Management Systems, for reference.
                                                27 See ANSI/ASSE A10.33–2011, American                 H. Inspections, Tests, and Accident                   17); the number of prior interventions
                                              National Standard for Construction and Demolition        Prevention                                            completed by injured or ill CAW (Q 17); the
                                              Operations—Safety and Health Program                                                                           number of prior interventions completed by
                                              Requirements for Multi-Employer Projects, for             1. Traylor would have to initiate and                injured or ill CAW at that pressure (Q 17);
                                              reference.                                               maintain a program of frequent and                    the contact information for the treating



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                                              44398                             Federal Register / Vol. 80, No. 143 / Monday, July 27, 2015 / Notices

                                              healthcare provider (Q 17); and the date and                  c. Notify the OTPCA and the nearest                  Signed at Washington, DC, on July 22,
                                              time of last hyperbaric exposure for this                  affected Area Office within 15 working                2015.
                                              CAW.                                                       days and in writing, of any change in                 David Michaels,
                                                 In addition to completing the OSHA                      the compressed-air operations that                    Assistant Secretary of Labor for Occupational
                                              301 Incident Report form and OSHA                          affects Traylor’s ability to comply with              Safety and Health.
                                              300 Log of Work Related Injuries and                       the proposed conditions specified                     [FR Doc. 2015–18319 Filed 7–24–15; 8:45 am]
                                              Illnesses, Traylor would have to                           herein.                                               BILLING CODE 4510–26–P
                                              maintain records of:                                          d. Upon completion of each
                                                 1. The date, times (e.g., began
                                                                                                         hyperbaric tunnel project, evaluate the
                                              compression, time spent compressing,                                                                             LEGAL SERVICES CORPORATION
                                                                                                         effectiveness of the decompression
                                              time performing intervention, time
                                              spent decompressing), and pressure for                     tables used throughout the project, and
                                                                                                         provide a written report of this                      Notice of Availability of Calendar Year
                                              each hyperbaric intervention.                                                                                    2016 Competitive Grant Funds for the
                                                 2. The name of each individual                          evaluation to the OTPCA and the neared
                                                                                                         affected Area Office.                                 Veterans Pro Bono Program
                                              worker exposed to hyperbaric pressure
                                              and the decompression protocols and                           Note: The evaluation report would                  AGENCY:  Legal Services Corporation.
                                              results for each worker.                                   have to contain summaries of: (1) the                 ACTION: Solicitation of proposals for the
                                                 3. The total number of interventions                    number, dates, durations, and pressures               provision of pro bono legal services to
                                              and the amount of hyperbaric work time                     of the hyperbaric interventions                       veterans.
                                              at each pressure.                                          completed; (2) decompression protocols
                                                 4. The post-intervention physical                       implemented (including composition of                 SUMMARY:    The Legal Services
                                              assessment of each individual CAW for                      gas mixtures (air, oxygen, nitrox, and                Corporation (LSC) provides grants of
                                              signs and symptoms of decompression                        trimix), and the results achieved; (3) the            federally-appropriated funds for civil
                                              illness, barotrauma, nitrogen narcosis,                    total number of interventions and the                 legal services to low-income individuals
                                              oxygen toxicity or other health effects                    number of hyperbaric incidents                        and families.
                                              associated with work in compressed air                     (decompression illnesses and/or health                   Pursuant to Public Law 102–229, LSC
                                              or mixed gasses for each hyperbaric                        effects associated with hyperbaric                    administers the process of awarding
                                              intervention.                                              interventions as recorded on OSHA 301                 grant funds for the Veterans Pro Bono
                                                                                                         and 300 forms, and relevant medical                   Program for the purpose of furnishing
                                              K. Notifications                                                                                                 effective, efficient and high quality pro
                                                                                                         diagnoses and treating physicians’
                                                 1. To assist OSHA in administering                                                                            bono legal services to eligible veterans
                                                                                                         opinions); and (4) root-causes, and
                                              the conditions specified herein, Traylor                                                                         appearing before the United States Court
                                                                                                         preventive and corrective actions
                                              would have to:                                                                                                   of Appeals for Veterans Claims (Court).
                                                 a. Notify the OTPCA and the nearest                     identified and implemented.
                                                                                                                                                               LSC hereby announces the availability
                                              affected Area Office of any recordable                        e. To assist OSHA in administering                 of competitive grant funds for the
                                              injury, illness, in-patient                                the proposed conditions specified                     Veterans Pro Bono Program for calendar
                                              hospitalization, amputation, loss of an                    herein, inform the OTPCA and the                      year 2016 and solicits grant proposals
                                              eye, or fatality (by submitting the                        nearest affected Area Office as soon as               from interested parties. The exact
                                              completed OSHA 301 Incident Report                         possible after it has knowledge that it               amount of available funds and the date,
                                              form 28) resulting from exposure of an                     will:                                                 terms, and conditions of their
                                              employee to hyperbaric conditions                             i. Cease to do business;                           availability for calendar year 2016 will
                                              including those that do not require                                                                              be determined through the
                                              recompression treatment (e.g., nitrogen                       ii. Change the location and address of
                                                                                                                                                               congressional appropriations process for
                                              narcosis, oxygen toxicity, barotrauma),                    the main office for managing the
                                                                                                                                                               FY 2016. For the past three years,
                                              but still meet the recordable injury or                    tunneling operations specified by the
                                                                                                                                                               Congress has appropriated
                                              illness criteria (of 29 CFR 1904). The                     project-specific HOM; or
                                                                                                                                                               approximately $2.5 million each year.
                                              notification would have to be made                            iii. Transfer the operations specified             DATES: The deadline to submit a Notice
                                              within 8 hours of the incident, or after                   herein to a successor company.                        of Intent to Compete is Friday, August
                                              becoming aware of a recordable injury                         f. Notify all affected employees of this           28, 2015, at 5 p.m. Eastern Time.
                                              or illness, and a copy of the incident                     interim order/proposed permanent                      Notices must be submitted by email to
                                              investigation (OSHA 301) would have to                     variance by the same means required to                veteransprobono@lsc.gov.
                                              be provided within 24 hours of the                         inform them of its application for a                  ADDRESSES: Office of Program
                                              incident, or after becoming aware of a                     variance.                                             Performance, Veterans Pro Bono
                                              recordable injury or illness. In addition
                                                                                                            2. OSHA would have to approve the                  Program Competition, Legal Services
                                              to the information required by the
                                                                                                         transfer of the proposed permanent                    Corporation, 3333 K Street NW., Third
                                              OSHA 301, the incident-investigation
                                                                                                         variance to a successor company.                      Floor, Washington, DC 20007–3522.
                                              report would have to include a root-
                                              cause determination, and the preventive                                                                          FOR FURTHER INFORMATION CONTACT: For
                                                                                                         Authority and Signature
                                              and corrective actions identified and                                                                            questions about the application process,
                                              implemented.                                                  David Michaels, Ph.D., MPH,                        please contact Meredith Horton, Office
                                                 b. Provide certification within 15 days                 Assistant Secretary of Labor for                      of Program Performance, by email at
                                              of the incident that it informed affected                  Occupational Safety and Health, 200                   veteransprobono@lsc.gov.
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                                              workers of the incident and the results                    Constitution Avenue NW., Washington,                  SUPPLEMENTARY INFORMATION: Funds for
                                              of the incident investigation (including                   DC 20210, authorized the preparation of               the Veterans Pro Bono Program are
                                              the root-cause determination and                           this notice. Accordingly, the Agency is               authorized by and subject to Public Law
                                              preventive and corrective actions                          issuing this notice pursuant to Section               102–229, title I, ch. II, 105 Stat. 1701,
                                              identified and implemented).                               29 U.S.C. 655(6)(d), Secretary of Labor’s             1710, as incorporated by reference in
                                                                                                         Order No. 1–2012 (77 FR 3912, Jan. 25,                subsequent appropriations for the
                                                28 See   footnote 8.                                     2012), and 29 CFR 1905.11.                            United States Court of Appeals for


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Document Created: 2018-02-23 09:27:05
Document Modified: 2018-02-23 09:27:05
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionNotices
ActionNotice.
DatesSubmit comments, information, documents in response to this notice, and request for a hearing on or before August 26, 2015. The interim order specified by this notice becomes effective on July 27, 2015, and shall remain in effect until the interim order is modified or revoked.
ContactInformation regarding this notice is available from the following sources:
FR Citation80 FR 44386 

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