82 FR 34699 - Petitions for Modification of Application of Existing Mandatory Safety Standards

DEPARTMENT OF LABOR
Mine Safety and Health Administration

Federal Register Volume 82, Issue 142 (July 26, 2017)

Page Range		34699-34701
FR Document		2017-15673
This notice is a summary of petitions for modification submitted to the Mine Safety and Health Administration (MSHA) by the parties listed below.
Federal Register, Volume 82 Issue 142 (Wednesday, July 26, 2017)
[Federal Register Volume 82, Number 142 (Wednesday, July 26, 2017)]
[Notices]
[Pages 34699-34701]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2017-15673]


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DEPARTMENT OF LABOR

Mine Safety and Health Administration


Petitions for Modification of Application of Existing Mandatory 
Safety Standards

AGENCY: Mine Safety and Health Administration, Labor.

ACTION: Notice.

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SUMMARY: This notice is a summary of petitions for modification 
submitted to the Mine Safety and Health Administration (MSHA) by the 
parties listed below.

DATES: All comments on the petitions must be received by MSHA's Office 
of Standards, Regulations, and Variances on or before August 25, 2017.

ADDRESSES: You may submit your comments, identified by ``docket 
number'' on the subject line, by any of the following methods:
    1. Electronic Mail: [email protected]. Include the docket 
number of the petition in the subject line of the message.
    2. Facsimile: 202-693-9441.
    3. Regular Mail or Hand Delivery: MSHA, Office of Standards, 
Regulations, and Variances, 201 12th Street South, Suite 4E401, 
Arlington, Virginia 22202-5452, Attention: Sheila McConnell, Director, 
Office of Standards, Regulations, and Variances. Persons delivering 
documents are required to check in at the receptionist's desk in Suite 
4E401. Individuals may inspect copies of the petitions and comments 
during normal business hours at the address listed above.
    MSHA will consider only comments postmarked by the U.S. Postal 
Service or proof of delivery from another delivery service such as UPS 
or Federal Express on or before the deadline for comments.

FOR FURTHER INFORMATION CONTACT: Barbara Barron, Office of Standards, 
Regulations, and Variances at 202-693-9447 (Voice), 
[email protected]

[[Page 34700]]

(Email), or 202-693-9441 (Facsimile). [These are not toll-free 
numbers.]

SUPPLEMENTARY INFORMATION: Section 101(c) of the Federal Mine Safety 
and Health Act of 1977 and Title 30 of the Code of Federal Regulations 
Part 44 govern the application, processing, and disposition of 
petitions for modification.

I. Background

    Section 101(c) of the Federal Mine Safety and Health Act of 1977 
(Mine Act) allows the mine operator or representative of miners to file 
a petition to modify the application of any mandatory safety standard 
to a coal or other mine if the Secretary of Labor determines that:
    1. An alternative method of achieving the result of such standard 
exists which will at all times guarantee no less than the same measure 
of protection afforded the miners of such mine by such standard; or
    2. That the application of such standard to such mine will result 
in a diminution of safety to the miners in such mine.
    In addition, the regulations at 30 CFR 44.10 and 44.11 establish 
the requirements and procedures for filing petitions for modification.

II. Petitions for Modification

    Docket Number: M-2017-013-C.
    Petitioner: Texas Westmoreland Coal Company, P.O. Box 915, Jewett, 
Texas 75846.
    Mine: Jewett Mine, MSHA I.D. No. 41-03164, located in Leon County, 
Texas.
    Regulation Affected: 30 CFR 77.803 (Fail safe ground check circuits 
on high-voltage resistance grounded systems).
    Modification Request: The petitioner requests a modification of the 
existing standard for use of a special procedure when the dragline 
boom/mast is raised or lowered during necessary repairs/dismantling. 
The petitioner states that:
    (1) Texas Westmoreland Coal Company realizes that some stages of 
assembly/disassembly of draglines require special consideration when 
the boom/mast is raised/lowered into position. The boom is raised/
lowered utilizing the on board motor generator sets. This is critical 
because, during the process, power to the machine must not be 
interrupted. Power loss conditions may result in the boom becoming 
uncontrolled, falling, and resulting in possible injuries to workers. 
To address this condition, the following guidelines will be implemented 
to help prevent loss of power to the machine. This procedure only 
addresses raising/lowering the boom on draglines utilizing the machines 
electrical onboard motor generator sets. It does not replace other 
mechanical precautions or the requirements of 30 CFR 77.803 that are 
necessary to safely secure booms/masts during construction or 
maintenance procedures.
    (2) The following is a procedure for ``boom raising'' or ``boom 
lowering'' at Texas Westmoreland Coal Company's Jewett Mine. During 
this period of construction/maintenance, the machine will not be 
performing mining operations. This procedure would also be applicable 
in instances of disassembly or maj9or maintenance which requires the 
boom to be raised/lowered. The following guidelines will be followed to 
minimize the potential for electrical power loss during this critical 
boom procedure.
    (3) The procedure would most likely only be used during disassembly 
or major maintenance. Major maintenance requiring the raising/lowering 
of the boom/mast would only be performed on an as-needed basis, which 
could span long periods of time. Therefore, training and review of the 
procedure would only be conducted prior to this need. At such time, all 
persons involved in the procedure would be trained or retrained.
    (a) Texas Westmoreland Coal Company employees, its contractors, and 
affected persons will be trained on the requirements of the procedure 
at the Jewett Mine.
    (b) The procedure will be coordinated by Texas Westmoreland Coal 
Company's Production Superintendent and, if present, the contractor's 
representative will assist. Two (2) MSHA qualified electricians will be 
present at all times during the procedure.
    (c) The procedure will limit the number of persons required on 
board the machine. An MSHA-qualified electrician, dragline operator, 
and the dragline oiler will be permitted on the machine. Texas 
Westmoreland Coal Company's production Superintendent and contractor's 
representative may either be on board or at a location on the ground to 
assist in the coordination.
    (d) The affected area under the boom will be secured to prevent 
persons from entering and/or contacting the frame of the machine during 
the boom raising/lowering. The area will be secured and only those 
persons identified in paragraph 3 above will be permitted inside the 
secured area. At no time will anyone be permitted under the boom or 
close to the boom.
    (e) Communication between the dragline operator, the MSHA-qualified 
electrician at the dragline, the MSHA-qualified electrician at the 
substation, Texas Westmoreland Coal Company's Production 
Superintendent, and the contractor's representative, if present, will 
be by a dedicated channel on the company's two-way radio.
    (f) An MSHA-qualified electrician will complete an examination of 
all electrical components that will be energized. The examination will 
be done within two (2) hours prior to the boom raising/lowering 
process. A record of this examination will be made and available to 
interested parties. The machine will be de-energized to perform this 
examination.
    (g) After the examination has been completed, the electrical 
components necessary to complete the boom raising/lowering process will 
be energized to ensure they are operating properly as determined by an 
MSHA-qualified electrician. When the above is completed, the machine 
will be de-energized and locked out.
    (h) The ground fault and ground check circuits will be disabled 
provided:
    1. The internal ground conductor of the trailing cable has been 
tested and is continuous from the frame of the dragline to the 
grounding resistor located at the substation. Utilizing the ground 
check circuit and disconnecting the pilot circuit at the machine frame 
and verifying the circuit breaker cannot be closed will be an 
acceptable test. Resistance measurements can also be used to test the 
ground conductor. The grounding resistor will be tested to assure it is 
properly connected, is not open, or is not shorted.
    2. Normal short circuit protection will be provided at all times. 
The over current relay setting may be increased up to 100 percent above 
its normal setting.
    (i) During the boom raising/lowering procedure, an MSHA-qualified 
electrician will be positioned at the substation to monitor the 
grounding circuit. The MSHA- qualified electrician at the substation 
will at all times maintain communications with an MSHA qualified 
electrician at the dragline. If a grounded phase condition or an open 
ground wire should occur during the process, the MSHA-qualified 
electrician at the substation will notify the MSHA-qualified 
electrician at the dragline. All persons on board the machine must be 
aware of the condition and must remain on board the machine. The boom 
must be lowered to the ground or controlled and the electrical circuit 
de-energized, locked and tagged out. The circuit must remain de-
energized until the condition is corrected. The ground fault and ground 
check circuits will be reinstalled prior

[[Page 34701]]

to re-energizing and testing the machine. Once circuits have been 
tested and no adverse conditions are present, the boom raising/lowering 
procedure as outlined above will be resumed.
    (j) During this construction/maintenance procedure, persons cannot 
get on/off the dragline while the ground fault ground check circuits 
are disabled unless the circuit to the dragline is de-energized, locked 
and tagged out as verified by the MSHA-qualified electrician at the 
substation.
    (k) After the boom raising/lowering is completed, the MSHA-
qualified electrician at the substation will restore all the protective 
devices to their normal state. When this has been completed, the MSHA-
qualified electrician at the substation will notify the MSHA-qualified 
electrician at the dragline that all circuits are in their normal 
state. At this time, normal work procedures can begin.
    The petitioner asserts that the proposed alternative method will 
always guarantee the miners affected no less than the same measure of 
protection afforded by the existing standard.
    Docket Number: M-2017-002-M.
    Petitioner: Martin Marietta Materials, Midwest Division, 11252 
Aurora Avenue, Des Moines, Iowa 50322.
    Mine: Fort Calhoun Underground Mine, 5765 County Road P 30, Fort 
Calhoun, Nebraska 68023, MSHA I.D No. 25-01300, located in Washington 
County, Nebraska.
    Regulation Affected: 30 CFR 57.11052(d) (Refuge areas).
    Modification Request: The petitioner requests a modification of the 
existing standard to permit an alternative method of compliance to 
permit use of bottled water in refuge areas in lieu of waterlines. The 
petitioner states that:
    (1) The Fort Calhoun Underground Mine will soon be developing two 
parallel decline tunnels to access an identified limestone reserve near 
Fort Calhoun, Nebraska. The decline tunnels will each be approximately 
3,200 feet in length. The tunnels will be spaced roughly 155 feet 
horizontally between tunnel center lines. Two cross passages are 
planned to connect the two parallel tunnels during development. The 
Fort Calhoun Underground Mine will provide a portable prefabricated 
refuge chamber in each of the two decline tunnels for the purpose of 
barricading in the event of a mine emergency.
    (2) The petitioner seeks modification of 30 CFR 57.11052(d) 
specifically with the standard's directive that refuge areas be 
provided with waterlines. The Fort Calhoun Underground Mine will 
provide waterlines to each of the two aforementioned refuge chambers; 
however, the installed waterlines will not support a potable water 
supply.
    (3) In lieu of a plumbed potable water supply, potable water will 
be provided in each of the two refuge chambers in the form of 
commercially purchased bottled water in sealed bottles.
    (4) The two planned portable refuge chambers to be used underground 
at the Fort Calhoun Underground Mine are each designed to sustain 20 
miners for a period of 36 hours under battery backup power. These 
prefabricated refuge chambers will, at all times, be equipped with 
waterlines being directly fed from the surface. The waterline supplied 
to the refuge chamber will not be a source of potable water for miners 
taking refuge. The reliability of source water quality and volume being 
fed to the chambers is jeopardized considering water transmission line 
will be installed in a mining environment and inherently susceptible to 
mechanical damage or restriction in the event of a mine emergency. 
Sourcing of water from a surface reservoir to the refuge chambers is 
affected by climate conditions on the surface. Adversely cold surface 
temperatures could restrict or cut off the supply of water to the 
refuge chambers resulting in a diminution of safety. Add-in 
contaminants (industrial or bacteria) in piped-in water results in a 
diminution of safety for the miners.
    (5) Potable water will be provided in each of the chambers in the 
form of commercially purchased bottled water in sealed bottles. Each of 
the two chambers will be provided with a minimum of 2.25 quarts of 
potable drinking water per person, per day. Considering that each of 
the chambers are designed to support 20 miners for a period of 36 
hours, each chamber will be outfitted with a minimum of 67.5 quarts or 
2160 ounces of commercially purchased potable drinking water in sealed 
bottles. Provisioned water will have a maximum shelf life of 2 years. 
The condition and quantity of stored water will be confirmed by monthly 
inspections. Written instructions for conservation of water will also 
be provided within the refuge chambers for reference.
    The petitioner asserts that the proposed alternative method will at 
all times guarantee no less than the same measure of protection 
afforded by the existing standard.

Sheila McConnell,
Director, Office of Standards, Regulations, and Variances.
[FR Doc. 2017-15673 Filed 7-25-17; 8:45 am]
 BILLING CODE 4520-43-P
Federal Register / Vol. 82, No. 142 / Wednesday, July 26, 2017 / Notices 34699

deficiency, conduct tests of air flow, • Evaluate whether the collection of MSHA Forms: MSHA Form 5000–41,
perform electrical work, repair information is necessary for the proper Safety and Health Activity Certification
energized surface high-voltage lines, performance of the functions of the or Hoisting Engineers Qualification
and perform duties of hoisting engineer. agency, including whether the Request Form.
The recorded information is necessary information has practical utility; Comments submitted in response to
to ensure that only persons who are • Evaluate the accuracy of MSHA’s this notice will be summarized and
properly trained and have the required estimate of the burden of the collection included in the request for Office of
number of years of experience are of information, including the validity of Management and Budget approval of the
permitted to perform these duties. the methodology and assumptions used; information collection request; they will
MSHA does not specify a format for the • Suggest methods to enhance the also become a matter of public record.
recordkeeping; however, it normally quality, utility, and clarity of the
Sheila McConnell,
consists of the names of the certified information to be collected; and
and qualified persons listed in two • Minimize the burden of the Certifying Officer.
columns on a sheet of paper. One collection of information on those who [FR Doc. 2017–15672 Filed 7–25–17; 8:45 am]
column is for certified persons and the are to respond, including through the BILLING CODE 4510–43–P
other is for qualified persons. use of appropriate automated,
Sections 75.100 and 77.100 pertain to electronic, mechanical, or other
the certification of certain persons to technological collection techniques or DEPARTMENT OF LABOR
perform specific examinations and tests. other forms of information technology,
Sections 75.155 and 77.105 outline the e.g., permitting electronic submission of Mine Safety and Health Administration
requirements necessary to be qualified responses. Petitions for Modification of
as a hoisting engineer or hoistman. Also, The information collection request Application of Existing Mandatory
under Sections 75.160, 75.161, 77.107 will be available on http:// Safety Standards
and 77.107–1, the mine operator must www.regulations.gov. MSHA cautions
have an approved training plan the commenter against providing any AGENCY: Mine Safety and Health
developed to train and retrain the information in the submission that Administration, Labor.
qualified and certified persons to should not be publicly disclosed. Full ACTION: Notice.
effectively perform their tasks. comments, including personal
These standards recognize State information provided, will be made SUMMARY: This notice is a summary of
certification and qualification programs. available on www.regulations.gov and petitions for modification submitted to
However, where State programs are not www.reginfo.gov. the Mine Safety and Health
available, MSHA may certify and The public may also examine publicly Administration (MSHA) by the parties
qualify persons. available documents at USDOL-Mine listed below.
Under this program MSHA will Safety and Health Administration, 201 DATES: All comments on the petitions
continue to qualify or certify 12th South, Suite 4E401, Arlington, VA must be received by MSHA’s Office of
individuals as long as these individuals 22202–5452. Sign in at the receptionist’s Standards, Regulations, and Variances
meet the requirements for certification desk on the 4th floor via the East on or before August 25, 2017.
or qualification, fulfill any applicable elevator. ADDRESSES: You may submit your
retraining requirements, and remain Questions about the information
employed at the same mine or by the comments, identified by ‘‘docket
collection requirements may be directed number’’ on the subject line, by any of
same independent contractor. to the person listed in the FOR FURTHER
Applications for Secretarial the following methods:
INFORMATION CONTACT section of this 1. Electronic Mail: zzMSHA-
qualification or certification are notice.
submitted to the MSHA Qualification comments@dol.gov. Include the docket
and Certification Unit in Denver, III. Current Actions number of the petition in the subject
Colorado. MSHA Form 5000–41, Safety line of the message.
This request for collection of
& Health Activity Certification or 2. Facsimile: 202–693–9441.
information contains provisions for
Hoisting Engineer Qualification Request 3. Regular Mail or Hand Delivery:
Certification and Qualification to
provides the coal mining industry with MSHA, Office of Standards,
Examine, Test, Operate Hoists and
a standardized reporting format that Regulations, and Variances, 201 12th
Perform Other Duties. MSHA has
expedites the certification and Street South, Suite 4E401, Arlington,
updated the data with respect to the
qualification process while ensuring Virginia 22202–5452, Attention: Sheila
number of respondents, responses,
compliance with the regulations. MSHA McConnell, Director, Office of
burden hours, and burden costs
uses the form’s information to Standards, Regulations, and Variances.
supporting this information collection
determine if applicants satisfy the Persons delivering documents are
request.
requirements to obtain the certification required to check in at the receptionist’s
Type of Review: Extension, without
or qualification sought. Persons must desk in Suite 4E401. Individuals may
change, of a currently approved
meet certain minimum experience inspect copies of the petitions and
collection.
requirements depending on the type of comments during normal business
Agency: Mine Safety and Health
certification or qualification. hours at the address listed above.
Administration.
OMB Number: 1219–0127. MSHA will consider only comments
II. Desired Focus of Comments postmarked by the U.S. Postal Service or
Affected Public: Business or other for-
mstockstill on DSK30JT082PROD with NOTICES

MSHA is soliciting comments profit. proof of delivery from another delivery
concerning the proposed information Number of Respondents: 957. service such as UPS or Federal Express
collection related to Certification and Frequency: On occasion. on or before the deadline for comments.
Qualification to Examine, Test, Operate Number of Responses: 4,590. FOR FURTHER INFORMATION CONTACT:
Hoists and Perform Other Duties. MSHA Annual Burden Hours: 465 hours. Barbara Barron, Office of Standards,
is particularly interested in comments Annual Respondent or Recordkeeper Regulations, and Variances at 202–693–
that: Cost: $77. 9447 (Voice), barron.barbara@dol.gov

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Federal Register / Vol. 82, No. 142 / Wednesday, July 26, 2017 / Notices 34701

to re-energizing and testing the however, the installed waterlines will DEPARTMENT OF LABOR
machine. Once circuits have been tested not support a potable water supply.
and no adverse conditions are present, (3) In lieu of a plumbed potable water Mine Safety and Health Administration
the boom raising/lowering procedure as supply, potable water will be provided
outlined above will be resumed. Petitions for Modification of
in each of the two refuge chambers in Application of Existing Mandatory
(j) During this construction/ the form of commercially purchased
maintenance procedure, persons cannot Safety Standards
bottled water in sealed bottles.
get on/off the dragline while the ground AGENCY: Mine Safety and Health
fault ground check circuits are disabled (4) The two planned portable refuge
chambers to be used underground at the Administration, Labor.
unless the circuit to the dragline is de-
energized, locked and tagged out as Fort Calhoun Underground Mine are ACTION: Notice.
verified by the MSHA-qualified each designed to sustain 20 miners for
a period of 36 hours under battery SUMMARY: This notice is a summary of
electrician at the substation. petitions for modification submitted to
(k) After the boom raising/lowering is backup power. These prefabricated
refuge chambers will, at all times, be the Mine Safety and Health
completed, the MSHA-qualified
equipped with waterlines being directly Administration (MSHA) by the parties
electrician at the substation will restore
fed from the surface. The waterline listed below.
all the protective devices to their normal
state. When this has been completed, supplied to the refuge chamber will not DATES: All comments on the petitions
the MSHA-qualified electrician at the be a source of potable water for miners must be received by MSHA’s Office of
substation will notify the MSHA- taking refuge. The reliability of source Standards, Regulations, and Variances
qualified electrician at the dragline that water quality and volume being fed to on or before August 25, 2017.
all circuits are in their normal state. At the chambers is jeopardized considering ADDRESSES: You may submit your
this time, normal work procedures can water transmission line will be installed comments, identified by ‘‘docket
begin. in a mining environment and inherently number’’ on the subject line, by any of
The petitioner asserts that the susceptible to mechanical damage or the following methods:
proposed alternative method will restriction in the event of a mine 1. Electronic Mail: zzMSHA-
always guarantee the miners affected no emergency. Sourcing of water from a comments@dol.gov. Include the docket
less than the same measure of protection surface reservoir to the refuge chambers number of the petition in the subject
afforded by the existing standard. is affected by climate conditions on the line of the message.
Docket Number: M–2017–002–M. surface. Adversely cold surface 2. Facsimile: 202–693–9441.
Petitioner: Martin Marietta Materials, temperatures could restrict or cut off the 3. Regular Mail or Hand Delivery:
Midwest Division, 11252 Aurora supply of water to the refuge chambers MSHA, Office of Standards,
Avenue, Des Moines, Iowa 50322. resulting in a diminution of safety. Add- Regulations, and Variances, 201 12th
Mine: Fort Calhoun Underground in contaminants (industrial or bacteria) Street South, Suite 4E401, Arlington,
Mine, 5765 County Road P 30, Fort in piped-in water results in a Virginia 22202–5452, Attention: Sheila
Calhoun, Nebraska 68023, MSHA I.D diminution of safety for the miners. McConnell, Director, Office of
No. 25–01300, located in Washington (5) Potable water will be provided in Standards, Regulations, and Variances.
County, Nebraska. each of the chambers in the form of Persons delivering documents are
Regulation Affected: 30 CFR required to check in at the receptionist’s
commercially purchased bottled water
57.11052(d) (Refuge areas). desk in Suite 4E401. Individuals may
Modification Request: The petitioner in sealed bottles. Each of the two
chambers will be provided with a inspect copies of the petitions and
requests a modification of the existing
minimum of 2.25 quarts of potable comments during normal business
standard to permit an alternative
drinking water per person, per day. hours at the address listed above.
method of compliance to permit use of
Considering that each of the chambers MSHA will consider only comments
bottled water in refuge areas in lieu of
are designed to support 20 miners for a postmarked by the U.S. Postal Service or
waterlines. The petitioner states that:
(1) The Fort Calhoun Underground period of 36 hours, each chamber will proof of delivery from another delivery
Mine will soon be developing two be outfitted with a minimum of 67.5 service such as UPS or Federal Express
parallel decline tunnels to access an quarts or 2160 ounces of commercially on or before the deadline for comments.
identified limestone reserve near Fort purchased potable drinking water in FOR FURTHER INFORMATION CONTACT:
Calhoun, Nebraska. The decline tunnels sealed bottles. Provisioned water will Barbara Barron, Office of Standards,
will each be approximately 3,200 feet in have a maximum shelf life of 2 years. Regulations, and Variances at 202–693–
length. The tunnels will be spaced The condition and quantity of stored 9447 (Voice), barron.barbara@dol.gov
roughly 155 feet horizontally between water will be confirmed by monthly (Email), or 202–693–9441 (Facsimile).
tunnel center lines. Two cross passages inspections. Written instructions for [These are not toll-free numbers.]
are planned to connect the two parallel conservation of water will also be SUPPLEMENTARY INFORMATION: Section
tunnels during development. The Fort provided within the refuge chambers for 101(c) of the Federal Mine Safety and
Calhoun Underground Mine will reference. Health Act of 1977 and Title 30 of the
provide a portable prefabricated refuge The petitioner asserts that the Code of Federal Regulations part 44
chamber in each of the two decline proposed alternative method will at all govern the application, processing, and
tunnels for the purpose of barricading in times guarantee no less than the same disposition of petitions for modification.
the event of a mine emergency. measure of protection afforded by the
mstockstill on DSK30JT082PROD with NOTICES

(2) The petitioner seeks modification I. Background
existing standard.
of 30 CFR 57.11052(d) specifically with Section 101(c) of the Federal Mine
the standard’s directive that refuge areas Sheila McConnell, Safety and Health Act of 1977 (Mine
be provided with waterlines. The Fort Director, Office of Standards, Regulations, Act) allows the mine operator or
Calhoun Underground Mine will and Variances. representative of miners to file a
provide waterlines to each of the two [FR Doc. 2017–15673 Filed 7–25–17; 8:45 am] petition to modify the application of any
aforementioned refuge chambers; BILLING CODE 4520–43–P mandatory safety standard to a coal or

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Document Created: 2017-07-26 01:30:06
Document Modified: 2017-07-26 01:30:06
Category		Regulatory Information
Collection		Federal Register
sudoc Class		AE 2.7: GS 4.107: AE 2.106:
Publisher		Office of the Federal Register, National Archives and Records Administration
Section		Notices
Action		Notice.
Dates		All comments on the petitions must be received by MSHA's Office of Standards, Regulations, and Variances on or before August 25, 2017.
Contact		Barbara Barron, Office of Standards, Regulations, and Variances at 202-693-9447 (Voice), [email protected] (Email), or 202-693-9441 (Facsimile). [These are not toll-free numbers.]
FR Citation		82 FR 34699
82 FR 34699 - Petitions for Modification of Application of Existing Mandatory Safety Standards

DEPARTMENT OF LABORMine Safety and Health Administration

Federal Register Volume 82, Issue 142 (July 26, 2017)

DEPARTMENT OF LABOR
Mine Safety and Health Administration
