May 24, 2016
- MEMORANDUM FOR:
- REGIONAL ADMINISTRATORS
- THROUGH:
- DOROTHY DOUGHERTY,
Deputy Assistant Secretary
- FROM:
- DEAN MCKENZIE, Acting Director
Directorate of Construction
- SUBJECT:
- Confined Spaces Litigation Settlement
This memorandum sets forth guidance regarding the application of 29
CFR 1926 Subpart AA to residential construction work. The following
Frequently Asked Questions (FAQs) clarify the scope of the standard, as
well as how the standard will apply to attics, crawl spaces, basements,
and other potential confined space or permit-required confined space
exposures that may occur during the course of residential construction
work. Finally, these FAQs address the standard's multi-employer
communication requirements and several questions regarding general
applicability of the rule.
These FAQs will be posted to the OSHA website and will be included in
any enforcement directive for the confined spaces in construction
standard.
Confined Spaces in Construction Qs and As
SCOPE
Question 1: What is a confined space?
A: A confined space means a space that (1) is large enough and so
configured that an employee can bodily enter it; (2) has limited or
restricted means for entry and exit; and (3) is not designed for
continuous employee occupancy (see 29 C.F.R. 1926.1202). All three
criteria must be met in order for a space to be considered a confined
space and covered by the Confined Spaces in Construction Standard
(hereinafter "Confined Spaces in Construction Standard" or "Standard").
Question 2: What is a permit-required confined space?
A: A permit-required confined space or permit space means a confined
space that has one or more of the following characteristics: (1)
contains or has the potential to contain a hazardous atmosphere; (2)
contains a material that has the potential for engulfing an entrant; (3)
has an internal configuration such that an entrant could be trapped or
asphyxiated by inwardly converging walls or by a floor which slopes
downward and tapers to a smaller cross-section; or (4) contains any
other recognized serious safety or health hazard (see 1926.1202).1
Question 3: Paragraph 1926.1203(a) requires that each
employer ensure that a competent person identifies all confined spaces
in which one or more of the employees it directs may work, and
identifies each space that is a permit space, through consideration and
evaluation of the elements of that space, including testing as
necessary. If the competent person must enter the space to assess its
characteristics and potential hazards, must the competent person treat
the space as a permit-required confined space?
A: If the competent person can reasonably foresee the presence of a
hazard or potential hazard that would make the space a permit-required
confined space (see response to Question 2), the competent person must
treat the space as a permit-required confined space when entering the
space to assess it. However, if the competent person cannot reasonably
foresee the presence of such a hazard, the competent person would not
need to treat the space as a permit-required confined space when
entering the space to assess it. Of course, if the competent person
encounters such a hazard when assessing the space, whether or not the
hazard was reasonably foreseeable, the competent person must treat the
space as a permit-required space after identifying the hazard.
Question 4: Does the Standard impose additional requirements
on "permit-required confined spaces" beyond those imposed for "confined
spaces"?
A: Yes. In fact, the vast majority of the Standard's requirements
only apply to permit-required confined spaces, and attics, basements,
and crawl spaces in a residential home will not typically trigger these
requirements. Once the employer's competent person2
performs an initial evaluation and determines that a confined space
does not require a permit (1926.1203(a)), the employer's only further
obligations under the Standard are to have a competent person reevaluate
the space and, if necessary, reclassify it as a permit-required
confined space if changes in the use or configuration of the space occur
that could increase the hazards or potential hazards to entrants or if
the employer has any indication that the initial evaluation may have
been inadequate (1926.1203(f)).
If the employer's competent person determines that the space is a
permit-required confined space, the following provisions also apply:
entry communication and coordination (1926.1203(h)), permit-required
confined space program (1926.1204), permitting process (1926.1205),
entry permit (1926.1206), training (1926.1207), duties of authorized
entrants, attendants, and entry supervisors (1926.1208-1210), and rescue
and emergency services (1926.1211).
Question 5: Does the characteristic "contains or has the
potential to contain a hazardous atmosphere" in the definition of
"permit-required confined space" refer only to those atmospheres which
pose an acute hazard?
A: Yes. Where employees are exposed to hazardous atmospheres that do
not present an immediate danger of death or impairment that could impede
the employee's ability to exit the confined space without assistance,
OSHA's health standards for those hazards apply, rather than the
Confined Spaces in Construction Standard (see 1926.1202 definition of
"hazardous atmosphere").
Question 6: In some residential home building3
projects, the home builder constructs multiple homes with the same or
similar basic configuration. If the presence or absence of any potential
hazard in an attic, crawl space, or basement is known, does the
Standard require a competent person to examine each attic, crawl space,
or basement in each home to make a determination as to whether the space
is a permit-required confined space?
A: No. The standard requires a competent person to identify all
permit-required confined spaces in which employees may work "through
consideration and evaluation of the elements of that space, including
testing as necessary." 1926.1203(a). If a competent person can reliably
determine whether attics, crawl spaces, or basements with the same or
similar configuration contain one of the hazards or potential hazards
listed in response to Question 2 without physically inspecting each of
the spaces, the competent person need not physically examine each space
to make the identification required under 1926.1203(a).
GENERAL QUESTIONS ON ATTICS, CRAWL SPACES, AND BASEMENTS
Question 7: Does the mere presence of a physical hazard in an
attic, crawl space, or basement (before steps are installed) make the
space a permit-required confined space under the Standard?
A: No. However, if the attic, crawl space, or basement (before steps
are installed) is a confined space, the presence of a physical hazard in
the space would trigger the permit-required confined space requirements
if the physical hazard is not isolated4
(see 1926.1203(g)) or if there is potential employee exposure to the
physical hazard. Note that not all unsafe conditions constitute
"physical hazards," which the standard defines as only those conditions
that could impede an entrant's ability to exit the space without
assistance.
Question 8: Does the presence of electrical equipment in an
attic, crawl space, or basement (before steps are installed)
automatically make the attic, crawl space, or basement (before steps are
installed) a permit-required confined space?
A: No. Only if an entrant has exposure to a serious hazard associated
with the electrical equipment, such as an exposed live conductor, and
the exposure could impede the entrant's ability to exit the space
without assistance, would the presence of electrical equipment make the
attic, crawl space, or basement (before steps are installed) a
permit-required confined space.
Question 9: Is a dimly lit attic, crawl space, or basement
(before steps are installed) necessarily a permit-required confined
space?
A: No. A confined space with limited lighting alone would not be
considered a permit-required confined space, provided that the limited
lighting could not impede an entrant's ability to exit the space without
assistance.5
Question 10: Does the mere presence of animals in an attic,
crawl space, or basement (before steps are installed) that is a confined
space automatically make the attic, crawl space, or basement (before
steps are installed) a permit-required confined space?
A: No. The presence of animals would only make a confined space a
permit-required confined space if the animals posed a physical hazard,
as defined by the standard.
Question 11: Does the presence of water in an attic, crawl
space, or basement (before steps are installed) that is a confined space
always make the attic, crawl space, or basement (before steps are
installed) a permit-required confined space?
A: No.
Question 12: Are attics, crawl spaces, or basements (before
steps are installed) containing utility service lines (e.g., water,
natural gas, fuel oil, sewage, steam and electric power) that pass
through them always considered to be permit-required confined spaces?
A: No. If utility services pass through attics, crawl spaces, or
basements (before steps are installed) that are confined spaces, the
inherent hazards of the material flowing through the service lines do
not have to be considered in the permit space determination unless it is
reasonably foreseeable that a rupture or leak could occur such that the
contents of the service lines could cause a serious safety or health
hazard that could impede an entrant's ability to exit the space without
assistance.
SPECIFIC QUESTIONS ON ATTICS
Question 13: Are all attics in a residential home considered confined spaces under the Standard?
A: No. A confined space is a space that (1) is large enough and so
configured that an employee can bodily enter it; (2) has limited or
restricted means for entry and exit; and (3) is not designed for
continuous employee occupancy. All three criteria must be met for an
attic to be considered a confined space. In many instances, an attic
will not be considered a confined space because there is not limited or
restricted means for entry and exit. For example, attics with a
permanent, full-size doorway and/or stairwell access would rarely6
meet the definition of a confined space, provided there are no other
impediments to egress. An attic under construction where there is no
drywall in place would also not have limited or restricted means for
entry or exit and would not be considered a confined space.
Question 14: Are attics that are confined spaces generally considered permit-required confined spaces?
A: No. Attics that are determined to be confined spaces would
generally not be permit-required confined spaces because they typically
do not contain the types of hazards or potential hazards that make a
confined space a permit-required confined space (see response to
Question 2).
Question 15: Does the presence of a fall hazard alone in an attic make an attic a permit-required confined space?
A: No. A fall hazard in an attic - such as falling through the
drywall of the attic - could cause a serious injury. However, fall
hazards within an attic would not generally impede the ability of an
entrant to exit the space without assistance and therefore would not
trigger the permit-required confined space requirements. OSHA notes that
even though permit-required confined space requirements would not be
triggered in this situation, employers would still be obligated to
protect their employees from fall hazards - as appropriate and required -
when they are working in an attic where fall hazards exist.
Question 16: Does the presence of a mechanical fan in an attic automatically make the attic a permit-required confined space?
A: No. The presence of a mechanical fan would only make the attic a
permit-required confined space if it is reasonably foreseeable that the
fan could cause an injury that could impede an entrant's ability to exit
the space without assistance.
Question 17: Does the presence of asbestos in an attic make the attic a permit-required confined space?
A: No. Asbestos would not trigger the permit-required confined space
requirements of the Standard. However, if asbestos were present in an
attic, an employer would need to follow any applicable requirements of
OSHA's asbestos standards.
Question 18: When does an employee perform an "entry" into an attic for purposes of the Standard?
A: The Standard defines "entry" as the action by which any part of a person passes through an opening into a permit-required confined space.
Thus, regardless of whether or not such action is intentional or any
work activities are actually performed in the space, if any body part of
an entrant breaks the plane of an attic opening, that would constitute
an entry under the Standard, provided that the attic also meets the requirements of a permit-required confined space.
Question 19: In the residential home building industry,
frequently an employee will need to perform a final inspection of an
attic before turning over a home to a home owner. This inspection is
often of limited duration. Does this inspection constitute an "entry"
into a permit-required confined space under the Standard if there is no
reasonably foreseeable hazard present?
A: No. A final inspection of an attic would rarely constitute an
"entry" because even if an attic were a confined space, it would not
normally contain any of the hazards or potential hazards that would
trigger the permit-required confined space requirements of the Standard:
(1) contains or has the potential to contain a hazardous atmosphere;
(2) contains a material that has the potential for engulfing an entrant;
(3) has an internal configuration such that an entrant could be trapped
or asphyxiated by inwardly converging walls or by a floor which slopes
downward and tapers to a smaller cross-section; or (4) contains any
other recognized serious safety or health hazard (see 1926.1202). An
entry employer may rely on a competent person's expertise and experience
in determining whether the presence of such a hazard or potential
hazard is reasonably foreseeable during such an inspection or any other
time when it is necessary to enter into an attic that is a confined
space. If the attic is a permit-required confined space, the
employer must comply with the permit-required confined space provisions
of the Standard whenever there is an entry regardless of the duration of
the entry.
The same analysis would apply to other inspections conducted by
employees either at the outset of a construction project or as the
project progresses. If there is no reasonably foreseeable hazard or
potential hazard present in an attic or any other space during the
construction process, the permit-required confined space requirements
would not be triggered.
Question 20: How hot must it be in an attic that is a
confined space for the attic to be considered a permit-required confined
space under the Standard?
A: Extreme heat can be considered a serious physical hazard in attics
such that the attics could be considered permit-required confined
spaces. OSHA has not quantified how hot it must be to trigger the
permit-required confined space requirements. However, the heat must be
so extreme that it could potentially impede an entrant's ability to exit
the attic without assistance. Factors that the Agency would consider
are (1) the temperature of the space while work is performed, (2) the
nature and duration of the tasks performed in the heat, and (3) whether
the entrant is acclimatized to work in extreme heat. A short-duration,
light-duty task performed in a hot attic would typically not constitute a
physical hazard triggering the permit-required confined space
requirements. In addition, measures to control the heat in an attic
(e.g., use of a fan) will be considered by the Agency in determining
whether a serious hazard exists in the first instance.
Question 21: Many new residential homes are constructed with
pull down stair access to the attics, often referred to as "disappearing
attic stairways." For attics that use this type of stair access, would
OSHA consider the attics to be confined spaces?
A: Whether an attic with pull down stair access would be considered a
confined space depends on whether the configuration of the stairs
impedes the ability of employees to exit the space. Ladder-like pull
down stairs that require employees to ascend/descend hand-over-hand,
limit egress and could therefore render an attic a confined space. An
attic that can be accessed via pull down stairs that resemble the
structure of a stationary stairway and do not require an employee to
ascend/descend hand-over-hand would not be considered a confined space
if there are no impediments to egress.
Question 22: During some residential home building projects,
employees may be performing work activities in an attic with no
atmospheric or physical hazards present. However, after starting work,
another crew of employees may perform activities outside of the space
(e.g., painting or staining parts of a home outside of the attic) that
could impact conditions in the attic. Does the performance of duties
outside of an attic typically turn a "confined space" into a
"permit-required confined space"?
A: No. The performance of duties outside of an attic would only turn a
"confined space" into a "permit-required confined space" if the work
outside of the attic could create a hazardous atmosphere or physical
hazard in the attic that could impede the ability of an entrant to
safely exit the space without assistance. It would be rare for this to
occur in the residential home building environment. For example, the use
of portable power tools outside of an attic will rarely, if ever,
create a noise hazard such that it would impede the ability of an
entrant to safely exit the attic without assistance. Similarly,
performing painting and staining outside of an attic will rarely create a
hazard that would impede the ability of an entrant to safely exit an
attic without assistance. However, using certain high VOC (volatile
organic compound) solvents in paint thinners or in floor stripping could
potentially create a hazardous atmosphere in an adjacent attic or other
confined space.
Question 23: During remodeling work on residential homes, the
remodelers will often need to enter a confined space to assess certain
aspects of the construction of the home (e.g., electrical wiring,
location of plumbing lines, etc.). Do employees performing this initial
assessment have to follow the permit-required confined space
requirements of the Standard?
A: A competent person must assess these spaces to determine whether
they are permit-required confined spaces prior to any entry. The
employer will only need to follow the requirements of a permit-required
confined space program if, based on the competent person's assessment,
the employer has reason to believe the space is a permit-required
confined space. It would be rare that a remodeler would need to follow
the permit-required confined space requirements in this situation
because most confined spaces in a residential home will not contain the
hazards that would trigger the permit-required confined space
provisions: (1) contains or has the potential to contain a hazardous
atmosphere; (2) contains a material that has the potential for engulfing
an entrant; (3) has an internal configuration such that an entrant
could be trapped or asphyxiated by inwardly converging walls or by a
floor which slopes downward and tapers to a smaller cross-section; or
(4) contains any other recognized serious safety or health hazard (see
1926.1202).
Question 24: If an HVAC unit in an attic that is a confined
space needs repair, requiring a contractor to enter the attic to perform
certain activities to fix the unit, is that entry into the attic
covered by OSHA's Confined Spaces in Construction Standard?
A: No, provided the repair is considered maintenance work on the unit
(covered by the general industry standards) such as adjusting existing
equipment or replacing component parts in kind. However, upgrading the
HVAC system or its component parts would be considered construction work
covered by the Standard.7 This would also be the case for any other piece of equipment in an attic that is a confined space.
Question 25: Some attics in residential homes are accessed
through standard door openings, which include the following dimensions:
24" x 80"
30" x 80"
32" x 78"
32" x 79"
32" x 80"
34" x 80"
36" x 78"
36" x 79"
36" x 80"
38" x 82"
42" x 80"
60" x 80"
64" x 80"
68" x 80"
72" x 80"
74" x 96"
For attics with entry doors of standard dimensions, such as
those listed above, would OSHA consider the attics to be confined spaces
under the Standard, assuming there are no other impediments to
access/egress on or around the entrance?
A: No. Attics with full-sized doors at least two feet in width and
six feet, six inches in height would not meet the definition of a
confined space, provided the path to the entrance and area around the
entrance are kept clear of structural or temporary impediments to
egress.
Question 26: Is the contractor who creates a permit-required
confined space responsible for placing a warning sign on or around the
entrance to the space warning of the existence of a permit-required
confined space?
A: Only an employer that should reasonably anticipate that the
employees it directs may enter a permit-required confined space is
required to post a sign or other equally effective means to warn
employees of the location of and danger posed by the permit-required
confined space. For example, if a contractor affixes drywall to the roof
trusses of a residential home and creates a confined space, that
contractor is not required to post a warning sign that the attic
constitutes a permit-required confined space, unless (1) the attic meets
the criteria of a permit-required confined space, and (2) the
contractor should reasonably anticipate that the employees it directs
may enter the attic.
Question 27: Is the permit for a permit-required confined space required to be posted?
A: No. However, the permit must be "made available" at the time of
entry to all authorized entrants or their authorized representatives.
This requirement to make the permit available could be met by posting
the permit or by "any other equally effective means" (see 1926.1205(c)).
SPECIFIC QUESTIONS ON BASEMENTS
Question 28: Is a basement in a residential home that is
designed for continuous occupancy by a homeowner a confined space under
the Standard?
A: No, provided the basement is configured as designed (e.g., has
permanent stairs, walk-out entry/exit, or egress window installed).
Question 29: Before a set of stairs is installed in a
residential home into a basement, home builders may access the space
through a walk-in door to/from the outside (i.e., walk-out basement).
Under these circumstances, would the basement be considered a confined
space?
A: No. Provided there is a door to/from the outside to the basement,
the basement would not be considered a confined space as there would not
be limited or restricted means of egress.
Question 30: In some homes, before a set of stairs is
installed into a basement, home builders may access the space through a
basement egress window that complies with Section R310 of the 2012 or
2009 International Residential Code. Under these circumstances, would
the basement be considered a confined space?
A: No. If the basement has an egress window that meets the
specifications of Section R310 of the 2012 or 2009 International
Residential Code, the basement would not be considered a confined space
as there would not be limited or restricted means of egress to and from
the basement.
OTHER SPACES IN RESIDENTIAL HOMES
Question 31: There are some spaces in a residential home that
may technically meet the definition of a confined space, but there is
no reasonably foreseeable hazard within the space that could impede an
employee's ability to exit the space without assistance. Examples of
this would be a small pantry or a small space underneath a stairwell in a
home. Are these spaces considered permit-required confined spaces under
the Standard?
A: No. Even if the space is a confined space (see response to
Question 1), if there is no reasonably foreseeable hazard or potential
hazard within a space that could impede an entrant's ability to safely
exit the space without assistance (see response to Question 2), then a
residential home builder would not be required to consider the space a
permit-required confined space under the Standard. A residential home
builder may rely on a competent person's experience and expertise in
determining whether any such hazard or potential hazard in a space is
reasonably foreseeable.
MULTI-EMPLOYER COMMUNICATION PROVISIONS
Question 32: Do the multi-employer communication requirements
of 1926.1203(h)(1) of the Standard apply to host employers that do not
have employees who work on the worksite?
A: No. The requirements only apply to host employers with employees
who work at the worksite, regardless of when those workers are at the
site.
Question 33: Paragraph 1926.1203(h)(1) of the Standard
includes requirements for permit space entry communication and
coordination. It requires that before entry operations begin, the host
employer must provide the following information, if it has it, to the
controlling contractor: (1) the location of each known permit space; (2)
the hazards or potential hazards in each space or the reason it is a
permit space; and (3) any precautions that the host employer or any
previous controlling contractor or entry employer implemented for the
protection of employees in the permit space. Under the Standard, is the
host employer required to perform a separate assessment of all spaces to
gather the information required by this paragraph?
A: No. The Standard only requires the host employer to communicate
the information in paragraph (h)(1) if it is known by the host employer.
The Standard does not require the host employer to perform a separate
assessment to gather the information. In addition, the communication
provisions only require host employers to convey the information to the
controlling contractor through reasonable means. There is no requirement
in the standard for the host employer to verify that the information
has been received by the controlling contractor or transmitted to entry
employers by the controlling contractor. A host employer that has the
information in paragraph (h)(1) need only communicate the information to
the controlling contractor one time to satisfy the requirements of the
Standard. Additional communications will only be required if the host
employer gains additional such information not included in the original
communication.
Question 34: Are host employers/controlling contractors
responsible for compliance with the permit-required confined space
program provisions of the Standard if they have no reason to anticipate
that the employees they direct will enter a permit-required confined
space?
A: No. However, these employers must nonetheless (1) take effective
measures to ensure that the employees they direct do not enter any known
permit spaces (see 1926.1203(c)), and (2) comply with 1926.1203(h).
Otherwise, only employers that should reasonably anticipate that the
employees they direct may enter a permit space are responsible for
compliance with the permit-required confined space requirements of the
Standard. For example, employers that will not direct any employees to
enter a confined space are not required to comply with the following
provisions of the rule: permit-required confined space program
(1926.1204), permitting process (1926.1205), entry permit (1926.1206),
training (1926.1207), duties of authorized entrants, attendants, and
entry supervisors (1926.1208-1210), and rescue and emergency services
(1926.1211).
Question 35: Can a residential home builder serving as a host
employer or controlling contractor perform a single communication
(whether from a host employer to a controlling contractor or from a
controlling contractor to an entry employer) to fulfill its obligations
under 1926.1203(h) of the Standard provided there are no expected
deviations in the presence or absence of potential hazards in a confined
space in a home?
A: Yes. The Standard does not require multiple communications of the
information in paragraph (h) between employers on a residential home
building site (whether at a single home building site or a site with
multiple homes being constructed) where the potential hazards of
confined spaces remain the same or substantially the same as long as any
minor differences between the spaces are not relevant to which
provisions of the standard apply to the spaces. However, if a host
employer or controlling contractor learns of new information relevant to
assessing the space under the Standard after an initial communication,
the host employer or controlling contractor would need to convey the new
information in a subsequent communication.
Question 36: Does 1926.1203(h) necessarily require entry
employers to communicate the specified information before and after each
time an employee goes into an attic, basement, or crawl space that is a
permit-required confined space?
A: No. An entry employer must communicate the information required
under 1926.1203(h)(3) before "entry operations" begin, and it must
communicate the information required under 1926.1203(h)(5) after "entry
operations" have ended. Entry employees may go into and out of the space
multiple times while completing the tasks identified on the permit
without making additional communications as long as the entry employer
maintains control over the space between the pre-entry and post-entry
communications required under 1926.1203(h)(3) and (h)(5). In addition, a
single pre-entry communication could address entry operations in
multiple spaces under 1926.1203(h)(3) and a single post-entry
communication could address multiple entry operations under
1926.1203(h)(5), provided each space has its own permit and is addressed
in the communication.
Question 37: Do the communication provisions in 1926.1203(h) apply to non-permit confined spaces?
A: No. These provisions only apply to permit-required
confined spaces. Employers who have confined spaces - but not
permit-required confined spaces - are under no obligation to follow the
communication requirements of the Standard.
Question 38: Does the exchange of information set forth between employers in 1926.1203(h) have to be in writing?
A: No. OSHA does not specify how the information is to be exchanged.
The Agency will deem it sufficient for each employer to provide the
necessary information through any appropriate mechanism. The information
exchange requirements can be oral. There is no requirement in the
Standard for written communications between employers on multi-employer
worksites.
Question 39: If an employer chooses to exchange the required
information in writing under 1926.1203(h), can the written communication
be informal?
A: Yes. While the exchange of information does not have to be in
writing, some employers may choose to establish a mechanism for a
written exchange. The written exchange does not have to be formal. It
can be performed through email, text message, or other informal means,
so long as the required information is provided.
Question 40: Under 1926.1203(h), is the controlling
contractor under any obligation to enter a space to get information to
relay to a host employer or entry employer?
A: No. A controlling contractor only needs to obtain information on
permit-required confined spaces from the host employer and entry
employer(s) and provide this information and other known information on
permit-required confined spaces to a host employer or entry employer.
The Standard does not require a controlling contractor to enter spaces
to gather information.
Question 41: On multi-employer worksites, is every employer
responsible under 1926.1203(a) to assess the worksite to determine the
location and presence of confined spaces and information about
permit-required confined spaces?
A: No. Only employers that should reasonably anticipate that the
employees they direct may enter confined spaces are required to perform
this assessment. For host employers and controlling contractors that
have no reason to anticipate that the employees they direct may enter
confined spaces, there is no obligation to perform this initial
assessment of the worksite.
Question 42: Is a home owner who is not an employer covered by the Standard?
A: No. The Standard only applies to employers.
APPLICATION OF THE STANDARD
Question 43: Can an entry supervisor also serve as an attendant during an entry into a permit-required confined space?
A: Yes. An entry supervisor also may serve as an attendant or as an
authorized entrant, as long as that person is trained and equipped as
required by the Standard for each role he or she fills.
Question 44: The Standard defines isolate or isolation as
"the process by which employees in a confined space are completely
protected against the release of energy and material into the space, and
contact with a physical hazard, by such means as: blanking or blinding;
misaligning or removing sections of lines, pipes, or ducts; a double
block and bleed system; lockout or tagout of all sources of energy;
blocking or disconnecting all mechanical linkages; or placement of
barriers to eliminate the potential for employee contact with a physical
hazard." Is guarding by location an acceptable form of isolation under
the Standard?
A: Yes. Guarding by location-that is, configuring the space or
equipment in the space to eliminate employee exposure to the hazard-is
an acceptable form of isolation under the standard.
Question 45: OSHA has identified "noise" as a potential
physical hazard. What noise level must be reached in order to constitute
a physical hazard such that the permit-required confined space
requirements apply?
A: There is no specific threshold noise level that must be reached in
order for noise to constitute a physical hazard triggering the
permit-required confined space requirements. However, the noise must be
so extreme that it could impede an entrant's ability to safely exit the
space without assistance. In most instances, noise levels below the
eight-hour TWA permissible exposure limit for noise in construction of
90 dBA would not constitute a physical hazard triggering the
permit-required confined space requirements.
Question 46: If engineering and administrative controls
cannot be implemented in a residential homebuilding project to address
potential noise exposures, is it acceptable for a residential home
builder to rely on personal protective equipment to address noise
exposures for purposes of the Standard?
A: Yes. A residential home builder may rely on personal protective
equipment to address a noise hazard for purposes of complying with the
Standard so long as the personal protective equipment itself does not
serve to impede the ability of an entrant to safely exit the space
without assistance.
Question 47: If a competent person determines that a confined
space in a residential home does not contain or have the potential to
contain a hazardous atmosphere, would an entry employer need to conduct
atmospheric testing of the space before an entry and provide for
continuous monitoring of the space during the entry?
A: No. If a confined space does not contain or have the potential to
contain a hazardous atmosphere, an entry employer is not required to
perform atmospheric testing or atmospheric monitoring.
Question 48: In determining whether a space has limited means
of egress such that it would be considered a confined space, does the
size of the entry employee matter?
A: No. Whether a space has limited means of egress is a
fact-dependent determination based on the size of the entrance and the
configuration of the inside of the space. It is not dependent on the
size of an entry employee.
Question 49: Can OSHA cite an employer for not documenting the initial evaluation of the workplace required by 1926.1203(a)?
A: No. The initial evaluation need not be documented. The employer,
however, must be able to explain how the evaluation was conducted and
describe the results. Thus, any citation will be for failure to
evaluate the workplace as required by the Standard, rather than for
failure to create a record of the evaluation.
Question 50: Does the initial evaluation for determining if a
confined space is a permit space, required by 1926.1203(a), mandate a
specific physical survey of each space?
A: No. The evaluation requirement may be met through existing
experience and knowledge of the space, provided this information is
adequate to make the determination required by the Standard. For
example, a competent person may have information which shows that the
hazards or potential hazards of all attics, crawl spaces, and basements
(before steps are installed) will not impede an entrant's ability to
exit the space without assistance. Therefore, these spaces would not
need to be evaluated individually before each entry. This same approach
can be used for any entry employer which has a number of identical
spaces and information to support its determination(s). See the response
to Question 6.
Question 51: Under the Standard, which employer issues the permit for permit-required confined spaces?
A: The permit is issued by the entry employer (see 1926.1205(a) and
the definition of "entry employer" in 1926.1202: the "employer who
decides that an employee it directs will enter a permit space").
Question 52: If a rescue service fails to notify an entry
employer that the rescue service is unavailable, will the entry employer
be cited under the Standard?
A: No. So long as the entry employer informed the rescue service that
rescue services may be needed and of the requirement that the rescue
service notify the employer if it is unavailable for rescue, and the
rescue service agreed to provide the notification, no citation will
issue to the entry employer if the rescue service fails to fulfill its
agreement to notify the entry employer that it is unavailable to perform
rescue services.
Question 53: If an employer establishes a policy
prohibiting the employees it directs from working in a permit-required
confined space and effectively communicates the policy to those
employees, does that employer still need to have a rescue harness on
site and train the employees it directs in rescue operations?
A: No. Only employers that can reasonably anticipate that the
employees they direct may enter permit-required confined spaces are
subject to the requirement to develop and implement procedures for
rescue and emergency services under 1926.1204(i) and 1926.1211.
Question 54: In fulfilling the requirements of 1926.1203(a),
can a competent person rely on experience and past practice in terms of
assessing the existence of confined spaces and permit-required confined
spaces?
A: Yes. A competent person can draw from his or her experience and
expertise in making the required assessment under 1926.1203(a).
Question 55: What constitutes serious physical damage under the Standard?
A: Section 1926.1202 defines serious physical damage as an impairment
or illness in which a body part is made functionally useless or is
substantially reduced in efficiency. Injuries involving such impairment
would usually require treatment by a physician or other licensed
health-care professional. In general, injuries requiring only first-aid
treatment would not be considered serious physical damage because they
would not impair an employee's ability to safely exit a confined space
without assistance.
1
Under the Standard, the word "hazard" means either a "physical hazard"
or an "atmospheric hazard" as defined in the Standard. An unsafe
condition that does not meet the definition of "physical hazard" or
"atmospheric hazard" would not be considered a "hazard" under the
Standard or for purposes of this document.
2
A competent person means someone who is capable of identifying existing
and predictable hazards in the surroundings or working conditions which
are unsanitary, hazardous, or dangerous to employees, and who has the
authorization to take prompt corrective measures to eliminate them (see
1926.1202 definition of "competent person").
3
As used in these Qs and As, "residential home building" or "residential
home construction" refers to work on any residence being built using
traditional wood frame construction materials, methods, and procedures
that are typical to single-family home or townhouse construction.
Traditional wood frame construction materials and methods include (1)
framing materials - wood (or equivalent cold-formed sheet metal stud)
framing (not steel or concrete), wooden floor joists and roof
structures; (2) exterior wall structure - wood (or equivalent
cold-formed sheet metal stud) framing or masonry brick or block; and (3)
methods - traditional wood frame construction techniques (see OSHA's
Compliance Guidance for Residential Construction, STD 03-11-002 (June 6,
2011), available on OSHA's website). Work on multi-family residences
may also be considered "residential home building" or "residential home
construction" provided that the work similarly meets the criteria set
forth above.
4
For physical hazards, the Standard defines the term "isolate" as "the
process by which employees are completely protected against . . .
contact with a physical hazard, by means such as Blanking or blinding;
misaligning or removing sections of lines, pipes, or ducts; a double
block and bleed system; lockout or tagout of all sources of energy;
blocking or disconnecting all mechanical linkages; or placement of
barriers to eliminate the potential for employee contact with a physical
hazard." 1926.1202. Guarding by location is also an acceptable means
of isolation under the Standard (see response to Question 44).
5 Note, however, that dimly lit spaces can potentially pose other safety hazards, and lighting must comply with 29 C.F.R 1926.56.
6 See response to Question 21 regarding stairwell access to attics.
7
This response is consistent with OSHA's general policy on
distinguishing between general industry and construction work as
described in a Letter of Interpretation from OSHA to Raymond V. Knobbs
issued on November 18, 2003, available on OSHA's website.
(Ben Lambert/The Register Citizen) An underground heating oil tank at the Sons of Italy Hall, 34 Center St. in Torrington, which overflowed into the Naugatuck River, prompted a hazmat response in Torrington early Monday morning. Above, a team removes a combination of oil and water from the underground tank on Center Street. 
