INTEGRATED HSEC MANAGEMENT SYSTEM

TITLE CONFINED SPACES

TYPE OF DOCUMENT Standard for high-risk activity

UNIT Tintaya - Antapaccay

CODE TAN-EAR-SEG-003

VERSION 01

DATE OF PREPARATION 12/08/2013 REVIEW DATE 09/07/2014

Name Cargo Company

PREPARED BY Erick Horna HS Advisor

Superintendent of
Operations -
REVIEWED BY Juan Velarde
Processes
Standard Leader

Security Manager
APPROVED BY Andrés Miranda
and Occupational Health

CHANGE HISTORY

Version Date Modification Description

Update of the Standard: Work in Confined Spaces (CSS-
00 12/08/2013
SS-019, v_01, 01-05-10.
01 09/07/2014 Update to the new EAR format.

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 CONFINED SPACES
STANDARD FOR HIGH RISK ACTIVITY

I. OBJECTIVE

Establish guidelines to prevent, eliminate, or minimize injuries and

occupational diseases derived from risks associated with the entry of personnel
to confined spaces and their work in them.

II. SCOPE

This standard applies to all tasks carried out within the scope of the
operations of Antapaccay associated with work requiring entry to
confined spaces and it is strictly binding for all personnel, whether they are
own employees, workers from contracting companies, visitors, etc. Each
The worker must understand and apply this standard, familiarize themselves and operate accordingly.
to what it stipulates.

III. LEGAL REFERENCES AND OTHER REGULATIONS

• Supreme Decree No. 055-2010-EM "Regulation on Occupational Safety and Health and others
complementary measures in mining" Art. 121° and 123°.
• D.S. No. 015-2005-SA "Regulation on Permissible Limit Values for Agents"
Chemicals in the Work Environment
• R.M. No. 161-2007-MEM/DM "Regulation on Safety and Health at Work of the
Electrical Activities Article 34 - Work in confined spaces.
• Law No. 29783 'Law on Occupational Safety and Health'.
• ANSI/ASSE Z117.1-2009 "Safety Requirements for Confined Spaces".
• ANSI/ASSE Z359.1-2007 "Safety Requirements for Personal Fall Arrest Systems"
Subsystems and Components.
• OSHA 1910.146 'Permit-required confined spaces.'
• The National Institute for Occupational Safety and Health (NIOSH).

IV. KEY ACTIONS

• A risk assessment must be carried out before any entry for

identify high risks associated with confined spaces and unbreathable atmospheres
/ harmful.
• An action plan derived from the risk assessment must be implemented.
to control the high risks identified
• Specialized external personnel should be hired to work in spaces.
confined, when skills, equipment or conditions are not available
can be controlled at an internal level
• All confined spaces must be identified and documented.
• The signature protocol and monitoring specific to the permit must be complied with.
the entry to confined spaces.
• Audits must be conducted on the controls specific to the corresponding tasks.
confined spaces

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 CONFINED SPACES
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• Action plans must be developed and implemented for compliance

legal requirements.
• Training will be provided to all employees, contractors, and visitors.
that they attempt to enter a confined space for some reason.
• The supervision will effectively control thorough monitoring of tasks in
confined spaces.

V. ZERO TOLERANCE RULES

It is prohibited to report to work under the influence of alcohol or illicit drugs.

2. The use of appropriate personal protective equipment (PPE) is mandatory for the
homework.
4. It is prohibited to operate equipment or vehicles if not properly trained.
respective authorization.
It is mandatory to comply with the isolation and lockout procedure when
I worked with energy sources.
6. Safety protection devices must be respected, being
forbidden to remove them, avoid them or nullify them.
9. It is prohibited to enter restricted areas or confined spaces without authorization.
with due authorization.
It is mandatory, before starting a task, to identify hazards, control the
risks and having the required permits; as well as complying with the regulations,
established procedures and standards for the execution of these tasks.
12. It is mandatory to report all incidents that occur immediately.
workday.
VI. RESPONSIBILITIES

6.1 Area Managers

• Manage the necessary resources for the compliance with this standard.
• Ensure that investigations are conducted and necessary corrective actions are taken
in the event of an incident.
• Inspect on-site the compliance and application of this standard.

6.2 Security and Health Manager

• Generate the guidelines for the present standard.

6.3 Area Superintendent:

• Ensure that all employees who perform tasks or participate within
of their area of responsibility in activities related to spaces
confined individuals have received the appropriate training and instruction
for the prevention of incidents associated with this type of tasks. Without
this requirement will not allow entry to the confined space.
• Inspect on-site the compliance and application of this regulation.
• Verify through planned and behavioral observations, the
strict compliance with this standard.

6.4 Contract Owner or Area Supervisor:

• Verify that all confined spaces are identified, labeled, and
registered.

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 CONFINED SPACES
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• Update the IPERC of the specific task.

• In the case that the work is carried out by a contractor, the contract owner
he/she has the obligation to inform him/her of this regulation, leaving
written confirmation of their training and approval of it.
• Identify the possible gases that may exist or be produced before and during
of carrying out the tasks.
• Elaborate and jointly review with the workers who will intervene in
the labor, the AST, and the corresponding work permit. Likewise, it will request
the support of the HS advisor for the review and signing of them.
• Facilitates and coordinates the necessary resources to ensure safe work.
• Validate (signature) to track compliance with the information
contained in the permit.
• Ensure that all energies involved in the confined space have been
blocked in the correct way drained and evacuated the residual energies.
• Verify through planned and behavioral observations, the
strict compliance with this regulation.
• At the end of the work shift, he will cancel the Work Permit and verify.
that the Confined Space is properly delimited and signposted (lock
out, hard barriers, etc.).
• Ensure that when the work is finished, the tasks have been completed properly.
efficient, safe. Check the removal of tools, accessories, etc.
Inspect that the devices removed from their place have been replaced
before putting the equipment into service or enabling the confined area.
• Work permits must be filed for a period of 3 months.

6.5 HS Advisor
• Advise the contract owner or area supervisor to comply with the
requested data in the work permit. Verify that this has been
completed with the necessary information before allowing the entry of the
authorized workers.
• Maintain the annual certification, calibrated and in good condition of
conservation of the gas detection equipment.
• Carry out the measurement/monitoring of gases depending on the class of
confined space as many times as necessary and record the values
obtained in the work permit, when it comes to work performed
by staff from Antapaccay. In the case of contracting companies, the Advisor of
security will verify the monitoring or measurements made by supervision
trained and equipped in gas measurement in confined spaces of the
contracting company.
• Keep updated and record all training documentation
related to confined spaces and inform about the
HS Training Coordinator.

6.6 The Worker

• Having received the training and approval of the course; you will only be able to enter if
it has the authorization or permission signed by:
• Supervisor of the contracting company
• Task supervisor
• Area Supervisor
• Security advisor.

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 CONFINED SPACES
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• If the working conditions are not safe, the worker can refuse to
enter the closed area until the supervision in charge or owner of
improve the said conditions.
• Comply with the requirements of the work permit.
• Recognize the risks they may face in a Confined Space and
understand the consequences of exposure to the risks that may be
presents.
• Understand that they should not carry out tasks other than those indicated in the
work permit.
• Prevent unauthorized workers from entering the premises
Confined.
• If during the performance of work inside the confined space
Activate the gas detector alarm, evacuation will proceed.
immediately and communicate what happened to the supervisor for evaluation and
reassess the working conditions.

6.7 Watchman
• Have received and approved the confined space watcher training,
Be familiar with the dangers of confined spaces during entry,
including exposure routes (inhalation, absorption, etc.) signs,
symptoms, consequences.
• Keep an exact count of all entries and exits
workers who enter at any time inside the space
confined.
• It must be out of the confined space and only monitoring a space.
confined at the same time.
• Knowing the emergency communication procedure of
Antapaccay.
• Monitor the activities and the jobs inside and outside of space
confined to determine if it is safe for workers to stay in
inside.
• Maintain continuous and effective communication with the workers who
stay inside confined space and never enter the space
confined.
• Activate the emergency procedure as soon as you determine that
there is an emergency and authorized workers must evacuate the
confined space.

VII. STANDARD SPECIFICATIONS:

1. Definitions:
a) Confined Space
It is defined as anyone who meets one or more of the following
characteristics:
− It has limited means to enter and exit. Limited means is understood as,
to all those who do not allow an entrance or an exit in shape
safe and fast for all its occupants, for example: tanks of

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 CONFINED SPACES
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storage, sewers, spaces whose entry or exit is to

through a ladder, chair or harness with a lifting system.
− It does not have natural ventilation that ensures a suitable atmosphere.
for human life (during the execution of the work).
− Neutralize any possibility of fire and/or explosion (during the
execution of the work).
− It is not designed to be occupied by human beings in shape.
continues, with a risk of accumulation of toxic substances,
inflammable and/or explosive, with a lack of oxygen, (Annex 01).
In addition, confined spaces can be divided into four classes: A, B, C, or D.
according to the degree of danger to the life of the workers:
− Class A: Corresponds to those where there is an imminent danger to the
life.
− Generally atmospheric risks (flammable and/or explosive gases,
toxic, with deficiency or enrichment of oxygen.
− Class B: In this class, the potential risks within the space
confined can be due to injuries and/or illnesses that do not
they do not compromise life or health and can be controlled through the
personal protective equipment. For example: they are classified as
those whose oxygen content, flammable and/or toxic gases, and their
thermal load is within permissible limits.
− Class C: This category corresponds to confined spaces where the
danger situations do not require special modifications to the
normal work procedures or the use of additional PPE. By
example: new and clean tanks, outdoor open ponds larger than
1.5 m. in height, new and clean pipes, etc.
− Class D: This category corresponds to confined spaces where the
dangerous and/or risky situations may arise from development
normal activity, such as the application of products
disinfectants.
b) Watchman.-

Competent and trained person, responsible for determining if the

existing conditions for entering a confined space are acceptable
and safe, and that has been appointed to oversee the operations of
entry into a confined space, which has the authority to authorize and
stop the work if necessary.
c) Lower Explosive Limit (LEL).
It is the minimum concentration of flammable gases, vapors, or mists in the air.
below which the mixture is not explosive.
d) Dangerous Atmosphere.-
It is one that exposes the worker to a risk of death, incapacity,
injuries or acute poisoning. An atmosphere is dangerous when:

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− The oxygen (O2) content is greater than 23.5% or less than 19.5%.
− It has a LIE of 10% or more.
− The concentration of toxic gases exceeds the limits
allowed, (Annex 1).
− The presence of combustible dust in the air contained inside
the Confined Space should be equal to or greater than the LIE.

− The presence of Dust or Vapor prevents or obscures visibility to

a distance of 1.5 m inside the Confined Space.
− Occupational exposure to cold exceeds the Maximum Limits
Exposure time diaries in enclosed spaces.
e) Gas Detector.
Instrument used primarily for detection and measurement of
methane, hydrogen sulfide, carbon monoxide, oxygen among others.
Residual Energy.
They are the potentially hazardous energies that are present in the equipment.
and/or the operating area of the equipment or installation (even after having
a significant amount of time has passed since controlling the energies of
operation) and that can be released, uncontrollably, during the work of
repair or maintenance, causing harm to the people involved
in these jobs. In this classification are the electrical energies,
mechanical, hydraulic, pneumatic, chemical, thermal, and radiant, which
It is necessary to identify and control effectively during the analysis process.
of risk and blockage. (Zero point energy or 'residual energy' is the
lowest energy that a quantum mechanical physical system can possess, and
it is the energy of the ground state of the system.
g) Isolation and Lockout.-
It is the action of ensuring that the operational and/or residual energies (waters
upstream and downstream) cannot be released and are out of control of the
personnel who carry out the inspection, maintenance and/or repair of the equipment or
installation known as confined space.
h) Self-contained breathing apparatus.
It is a personal safety device used for the protection of the
airways during work in contaminated atmospheres and/or with
oxygen deficiency less than 19.5% or oxygen excess greater than 23.5%.
2. Personas:
The work team for entering the confined space will be
composed at a minimum of:
ü Work Supervisor.
ü Trained lookout.
ü Qualified and authorized entrants.

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ü Response and rescue brigade in case of emergency.

3. Equipment/tools/materials:
ü Gas measurement equipment used by the engineer, advisor, or lookout
qualified for the use of these.
ü Appropriate communication equipment (radios, cell phones, or other means)
ü Isolation and locking devices
ü Self-contained air equipment with spare tanks if it were
necessary.
ü Air lines
ü Fans and gas extractors
ü Rescue teams (tripod, rescue winch for people or hoist
with a pulley system with a mechanical advantage of 4 to 1, ropes, equipment
special lighting for confined spaces
ü Safety harness, for works at height and/or to facilitate rescue if necessary
necessary.
4. PPE (personal protective equipment):
ü Helmet
ü chin strap
ü Gloves
ü Respirator type according to risk assessment
ü Hearing protector
ü Safety glasses
ü Safety shoes or boots
ü Work clothes
ü Safety harness with double life line and "D" ring, lines of
security, etc.
5. Specific development
a. PROCEDURE FOR WORKING IN CONFINED SPACES
Work in confined spaces has great risks that must be
correctly assessed and controlled before and during operations
that they are carried out. The presence or generation of toxic gases,
flammable or explosive substances and the deficiency of oxygen are the causes of
many deaths in various productive activities.
The purpose of this procedure is to assist the workers.
establishments and contractors of Antapaccay to comply with the guidelines for
the entrance to the spaces confined (flotation cells, cells
columns, tanks, warehouses, pipes, etc.). This procedure is for
minimize the potential for accidents and injuries that result from

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 CONFINED SPACES
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entry, work, and exit from confined spaces, for this we will proceed
in the following way:
1.Before allowing people to enter confined spaces, the
Supervisor (Antapaccay or of the contracted companies), must
to ascertain the absence of hazardous gases and the presence of oxygen
sufficient, for this it must have the gas detector
being trained in the use of this device will perform the measurement in the
upper, middle and lower part of the confined space in order to have
correct information. If necessary, I would request the presence of the
Security advisor.
Every person who enters and exits confined spaces must
to be visually monitored by the trained lookout in spaces
confined who are outside the space recording the entry and
exit of each worker who is inside.
3. All direct input of gases, solids, liquids through gates,
pipes or ducts must be detected, isolated and blocked before
perform the task with the lock and card, the worker will verify this
blocking following the lock-out rule.
4. If there were equipment or parts (screws, etc.) inside the confined space
quotes, etc.) susceptible to being set in motion with commands
Outdoors, they must be de-energized and the lock-out standard must be applied.

5. Before starting any work in confined spaces, the Supervisor

will appropriately instruct the worker and will check the good condition of
gas presence or deficiency alarm devices
oxygen
6.Before starting the work, the Supervisor will contact Management
Security aims to alert the brigade of
emergency. The Supervisor will ensure that there are near the place to
at least two self-contained breathing apparatus in case of deficiency
of oxygen or the presence of toxic gases according to initial measurement, the
that will be used in every rescue action. Under no circumstances will it
He will attempt the rescue without the use of these autonomous respirators and without
training.
If there were no good ventilation in the confined space or it
detect the presence of toxic gases or oxygen deficiency and only
if the work is of vital importance, all workers who enter,
you must use a self-contained breathing apparatus, for this you must
be trained in its use.
8. If an explosion risk is detected through the meter, action will be taken to
ventilate and/or wash the area until the risk disappears. BY
NO REASON WILL BE ENTERED INTO A VENUE WITH RISK OF
EXPLOSION.
9. While the work lasts, there should be a supervisor who maintains
radio contact with the Hospital (emergency) and will raise the alarm in case of
any anomaly that you observe in the presented work.

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10. Every worker entering a confined space must wear their

gas monitor. When any of them sounds, the worker
will immediately abandon the premises and the lookout will not allow entry
until the conditions are suitable.
b. GENERAL CONDITIONS
• The Supervisor of the area on behalf of Antapaccay is responsible for the
work that will be carried out inside the confined space. It
plan the entry and execution of the work by responding and recording
the information requested in the Work Permit for Spaces
Confined, (Annex 2), jointly and always with the advisor of
security and all those involved from other areas if there were any.
• The preparation of the workplace is directly coordinated by the
area supervisor of Antapaccay; where the safety advisor
together with the task supervisor using the detector
of gases you will take air samples with data annotation
obtained, before the entry of personnel monitor the space
confined with some frequency to ensure that the atmosphere of
work is not dangerous.
• Before starting the work, a lookout must be designated.
properly accredited trained in confined spaces who
There will be constant monitoring, and the area must be marked.
I work to prevent unauthorized personnel from accessing the task.
• Only the electrical equipment that is strictly necessary will be used and this
It should not pose an explosion risk, the electrical equipment will be
grounded properly.
c. MONITORING OF CONFINED SPACE ATMOSPHERE
• The task supervisor along with the HS advisor will take measurements beforehand.
to perform the task from the outside and through a probe the
concentrations of Oxygen, Carbon Monoxide, Vapors
Inflammable at the same time as they determine the conditions of
visibility and concentration of gases inside at its three levels
(low, medium, high). These measurements must be recorded in the
Work Permit, carried out periodically according to the values
registered by the instrument. Likewise, according to the criterion of the
that carry out the measurement, the concentration of any must be measured
another substance that could reasonably be present.
• The monitoring parameters will be according to Annex No. 04 of the D.S.
055–2010–EM "Occupational Exposure Limits for agents
Chemicals and Annex No. 01 of D.S. 015-2005-SA:
Type of Gas Measurement Range
Oxygen (O2) 19.5%
Carbon Dioxide (CO2) Maximum 9000 mg/m3 or 5000 ppm
Carbon Monoxide (CO) Maximum 29 mg/m3 or 25 ppm
Hydrogen Sulfide (H2S) Maximum 14 mg/m3 or 10 ppm
• These measurements should be carried out by trained personnel in the
use of the device, periodically (due to temperature changes, shift

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in accordance with the established terms of the Work Permit for

Confined Spaces and record it in the same document.
• In the spaces deemed suitable for carrying out the work,
A worker from the group will be designated to enter the Space.
Confined with individual sound detectors for O2 and CO. This
the requirement must also be recorded in the Work Permit.
• The instrument or instruments used to carry out these measurements must
have a valid quality certification and calibration, and a period
of review established, which must be endorsed by the
Superintendency of Security.
d. PRECAUTIONS BEFORE PERFORMING THE TASK
Before starting the work, the following precautions should be taken:
• Only authorized, accredited, and trained personnel will enter a space.
confined.
• The designated lookout will be a trained and accredited person in
confined spaces and fully understand the communication sequence
and rescue in case of an emergency.
• The cylinders containing oxygen, acetylene, and other gases will not be
accepted within the confined space.
• Oxygen will never be used to ventilate a confined space nor
supplied to the breathing equipment.
• The ladder and scaffolding used will be safe and will comply with the
standards for Stairs, Scaffolds and Elevated Platforms, described in
the standard for work at height.
• As a rescue measure, the workers who have joined the
the enclosure must have a harness and a rope tied at the location where
the lifeline (D-ring) is hooked with the purpose of evacuating the
involved personnel.
• Identification of external factors that could affect during the
labor (energy, equipment, flows, valves, others).
• Clear the surrounding exterior, prevent objects from falling inside.
• Appropriate lighting will be provided that does not pose a source
of danger.
• Only the electrical equipment that is strictly necessary will be used.
it should not pose an explosion risk and must have insulation
appropriate. The equipment used must be suitable for the
atmosphere in which they will be used according to section 100 and
annexes H, I, and J of the National Electricity Code RM 037-2006-
MEM/DM, Annex 04.
• The electrical equipment will be properly grounded.
• Workers must take necessary information from this point.
to perform the respective AST.
e. VENTILATION, CLEANING AND PURGING
• Before allowing workers to enter a Confined Space, the
pipes, tanks, and ducts (except for tanks and water lines) must
wash and flush with plenty of pressurized water and apply ventilation
forced.

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• In qualified cases, for example: if during ventilation, cleaning or

purga maintains the pollutants or toxic gases, the Space
Confined space must be constantly ventilated.
Localized Forced Mechanics. Never ventilate with oxygen.
the air speed must not be less than 0.5 m/s. This requirement must
to be recorded in the Work Permit.
• For cases where the atmosphere within the confined space presents
there is a high potential that can present an atmosphere
immediately dangerous to the life or health of workers and the
work is highly required, entry into the confined space is
it should be done using Equipment with Auto content or otherwise
with a full face mask with an air line. The air
supplied in this last case will be from a type of air compressor
D, Annex 1, strictly prohibiting the connection of the masks
full face with air line to the industrial air network or compressor type
piston.
• According to the size or conditions present in the space
confined, it will be possible to have a relief staff available, so that
within a specified time, this staff can make the changeover
of those that are inside and allow their oxygenation,
to then repeat the function. The determination of the time will be in
function of the Task Supervisor's criteria and the HS advisor.
f. COMMUNICATIONS FROM THE OUTSIDE TO THE INSIDE IN A CONFINED SPACE
• There should always be eye contact and ongoing communication.
between the person who is outside (lookout) and the
authorized workers inside the Confined Space for
the Watchman in case of emergency immediate notice to ALASKA, to
Supervisor of the area and pull the line connected to the worker's harness in
emergency.
• The lookout must monitor the activities and the environment of the Space.
Confined, but never entering, to assess if it is safe to continue
with the tasks. This is a critical task of the lookout.
• The communication between the lookout and the workers may be through:
− Eye Contact
− Voice
− Signals
− Authorized communication equipment (consider atmospheres
explosive
• The Watchman must periodically check the condition of the workers,
asking simple questions.
• The lookout must have a permanent communication radio.
frequency where the work is being done example if
find in Processes it should be at frequency 12, if you
find oxides at frequency 06, if found in the mine at the
frequency 11, and if it is under maintenance mine in the
frequency 10, in case it is in another place it must be maintained in the

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frequency 02 (ALASKA) 'to give emergency notice' and thus be able to

activate the Rescue Procedure, in case a occurs
emergency. The Supervisor, with HS advisory, must evaluate the presence
at the site of a tripod and winch for personnel rescue that is
find inside, if the conditions of confined space
they were difficult for access in case of a possible emergency.
• The lookout must never enter the interior for the rescue, in the face of a
emergency condition only trained personnel will proceed to the
extraction of personnel at risk; if the lookout were trained for the
use of the tripod and can still communicate with the affected staff
(who will make the connection inside your harness to the winch)
You can start the extraction only if you know how to do it.
g. SPECIFIC PROCEDURES
• IN THE TANK:
• Before any work (except in water ponds) is
will proceed to wash it carefully with plenty of water at
pressure giving it, in addition, the necessary time for an adequate
ventilation. Explosion-proof fans will be used when the
natural ventilation may not be sufficient.
• Once this is completed, the levels of explosiveness must be checked.
toxic gases and presence of oxygen. Engines will not be installed.
internal combustion in closed tanks.
• IN CLOSED WAREHOUSES:
• Special care should be taken when operating combustion equipment
(forklift, bulldozer, front loader) since, along with
generate toxic gases, these devices consume the oxygen in the air
circulating.

VIII. VERIFICATION

Work Permit:
a) Purpose of the Work Permit
The purpose of completing a work permit, Annex 01, encompasses the
following considerations:
− Access restrictions for unauthorized persons.
− Identification, assurance, and communication between people or
departments that could be involved in this work.
− Record of locking and isolation measures.
− Preliminary actions for purging, ventilating, and washing the area of
work.
− Acceptable conditions of the indoor atmosphere and results of the
measurements during the gas test.
− Methods of communication to be used.

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− Identification of PPE applicable for the protection of workers.

− Purpose or reason for admission.
− Date and time of the start of authorization and temporal validity.
− List of authorized persons for access.
− Name and signature of the authorized and trained lookout.
− Persons responsible for the individuals accessing the space.
− Signatures of the individuals who authorize entry and verify compliance
of the conditions to be able to enter.
− Reception and acceptance of the completion of the work by the owner
of contract, area or task supervisor.
When all the Work Permit information has been completed (place
) of work), and all personnel involved are informed (which includes the
reading of the second page of the work permit that contains the
Considerations for carrying out this task) this permission will remain
at the place until the conclusion of the work and will be updated for each
work shift.
Any deviation from the initial conditions under which it was approved
work permit will result in its immediate interruption and
conduct a new risk assessment.
2. Task/Inspection Observations:
Every time work is done in a confined space, it must be carried out
an observation of the task, which must be the responsibility of the area supervisor or
task.

IX. REVIEW AND CONTINUOUS IMPROVEMENT:

1. Audits:
Not applicable.

X. ASSOCIATED DOCUMENTATION (RECORDS AND/OR ANNEXES)

Annex 1: Guide to Breathable Air Quality

Annex 2: Work permit in confined spaces
3. Annex 3: Confined Space Signage

Code: TAN-EAR-SEG-003 Date of Preparation: 12/08/2013

Page 13 of 14
Version: 01 Review Date: September 7, 2014
Uncontrolled Document once printed - For consultation only