HIRA – Hazard Identification and Risk Analysis. Document No.
HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
Project Name: 50MW SOLAR PRROJECT
Client: SEMBCORP
Discipline: Civil
BLASTING WORK
Activity:
Name
PREPARED BY Mr. MAYA KANNAN
APPROVED BY Mr. SUVETHAR
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
1. HIRA. INTRODUCTION.
HIRA stands for Hazard Identification and Risk Assessment. It is a systematic process used in workplaces to identify potential hazards, assess associated risks, and implement
control measures to minimize or eliminate those risks. HIRA is widely used in industries such as construction, manufacturing, and oil & gas to ensure workplace safety.
2. WHO IS INVOLVED.
The suggested attendance could include Technical Experts (people with knowledge and experience on the execution of the activity), and HSE Personnel (more people could
be involved if it is deemed necessary). The process shall be led by the Technical Experts as the main responsible for the activity being assessed. HSE Personnel shall participate
in the process as “consultants” to ensure the process is deep enough to ensure the accuracy of the results.
3. Benefits of HIRA
Enhances workplace safety
Reduces accidents and injuries
Improves compliance with safety regulations
Boosts productivity by minimizing downtime due to incidents
4.MAIN DEFINITIONS:
The following concepts are the “basic criteria” for common understanding of the process:
Concept Definition
A hazard is any agent that can cause harm or damage to humans, property, or the environment. (NOTE: a hazard poses no risk if there is no exposure to
Hazard
that hazard).
Risk A risk is the probability that exposure to a hazard will lead to a negative consequence.
Process used to determine the rank (or level) of a specific risk or group of risks. The process could be applied to both “un-processed” and “processed”
Risk
risks, meaning it can be used to assess a risk, and to re-assess the same risk after control measures have been set in order to know the effect of those,
Assessment
and/or develop additional controls for the residual risks.
A risk that cannot be eliminated, controlled “at source” or mitigated using design, engineering controls or collective control measures, and therefore
Residual Risk
requires administration controls and/or the use of PPE in order to reduce the effects of its occurrence.
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
5.THE PROCESS:
The steps of the HIRA process are the following:
1. Setting a logic sequence: An activity shall be “broken” in tasks (or steps), assigning a number to each task. Whenever feasible, it is recommended to start from the
preparation of the activity because this approach provides a wider scope of the different tasks involved in certain activity from the very beginning.
2. Name the task: Assign each task a name that makes sense to the entire group.
3. Identification of hazards: The hazards associated with the task must be pointed (for reference, a hazard is the “main event” that could result in the occurrence of
one or more risks if exposure is not addressed properly).
4. Identification of risks: All the foreseeable potential consequences of a hazard must be listed in order to provide an accurate frame of the extent of potential
damages.
5. Risk rating: The potential level of a risk must be determined based on the likelihood of occurrence and the potential consequences resulting from the same
occurrence (this is done multiplying severity times likelihood).
6. Setting control measures (managing the risk): The group shall work on defining the required measures to establish proper control measures for the identified risks.
There are four “levels” to be considered:
a. Eliminate the hazard/risk.
b. Control the hazard/risk at source through the use of engineering controls or organizational measures.
c. Minimize the hazard/risk by the design of safe work systems, which include administrative control measures.
d. Where residual hazards/risks cannot be controlled by collective measures, previsions shall be taken for appropriate personal protective equipment,
including clothing and other resources (e.g.: training).
7. Reassessing the risks: The “processed” risks should be reviewed one more time to reassess their potential after the establishment of control measures.
8. Setting specific remarks: In this process, a “remarks” section has been set to allow the group to set specific comments or additional previsions that should be
considered under specific circumstances (e.g.: compliance, contract requirements, weather conditions, etc.).
6.THE RISK ASSESSMENT CRITERIA:
The table on the following page shows the definitions required to establish common knowledge and standard criterion for risk assessment before starting the HIRA process.
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
Concept Definition Risk assessment table
The probability of occurrence of a specific risk, regardless of the existence of specific controls
VU: Very unlikely
U: Unlikely
Likelihood
P: Possible
L: Likely
V: Very Likely
The expected level of damage the risk could cause if the risk takes place, regardless of the existence of specific controls
L: Low – minor injuries or damages expected (e.g.: first aid / no remedial actions / minor reparations)
M: Medium – medium level injuries or damage expected injuries (e.g.: first aid & treatment / remedial actions /
advanced reparations)
Severity
H: High– serious injuries or damages expected (e.g.: single fatality, major wounds, hospital treatment / high level
remedial actions / major equipment reparations)
V: Very High (severe)– severe injuries or damages expected (e.g.: multiple fatalities, permanent disabilities / high cost
remedial actions, compliance issues / equipment loss)
Numerical method to assign a rank the ranking of an identified risk, resulting from multiplying the severity times the
Ranking
likelihood(s*l).
Low Risk A risk that does not inflict significant damage to people, the environment or assets, nor requires any investment to set
(negligible) controls.
Moderate A risk that could inflict minor damage to people, the environment or assets, and could require minor investment to set
Risk proper controls.
A risk that will inflict damage to people, the environment or assets, and will require mid-level investment and other
High Risk measures (e.g.: specific training, changes in specifications, selection of different equipment, etc.) to set proper
controls.
A risk that, if manifested, could inflict minor damage to people, the environment or assets, and will require major
Very High
investment to set adequate controls
Risk
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
NOTE: the task cannot not start until proper measures are taken and the risks have been reassessed and taken to an
acceptable level. If this is not possible, the activity shall be reassessed as a whole to determine a) if the risk can be
eliminated or mitigated through different design or engineering solutions or b) the possibility to change the execution
method as a whole, choosing a different approach.
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
7.HIRA process sheet available on the next page (the next section must be copied and attached to the corresponding method statement. this document
must remain complete).
General Earth works
HIRA
*Risk management criterion: These must be applied in sequential order for proper “risk processing”.
a. Eliminate the hazard/risk.
b. Control the hazard/risk at source using engineering controls or organizational measures.
c. Minimize the hazard/risk by the design of safe work systems, which include administrative control measures.
d. Where residual hazards/risks cannot be controlled by collective measures, previsions shall be taken for appropriate
personal protective equipment, including clothing, and other resources (e.g.: training).
BLASTING HIRA (HAZARD IDENTIFICATION AND RISK ASSESSMENT)
S Work Hazard Potential Likeliho Severi Risk Risk Existing Control Additional Responsibl
. Activity Identified Consequence od (1- ty (1- Scor Level Measures Controls e Person
N 5) 5) e (L Required
o × S)
1 Drilling Noise, Hearing loss, Eye 3 3 9 Mediu PPE (earplugs, goggles), Routine Site
of blast Vibration, injuries, Structural m Safe drilling techniques machine Supervisor
holes Flying debris damage Hand -Arm Anti - Vibration hand checkups
Musculoskele Vibration, Whole gloves, Ear plug with Job rotation
tal disorder , body Vibration earmuff ( double ear ,intermitten
Hearing loss ,Numbness, Loss of protection) t breaks
sensitivity ,White
hand finger
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
2 Explosive Fire, Injuries, Property 4 5 20 High To be handled only by Supersion Blasting
s Explosion, damage the Authorised by Blasting Engineer
handling Unauthorized Registered and licenced Engineer
access personal
3 Blasting Unauthorized Injuries 3 4 12 Mediu Security personnel, Confinemen Safety
area personnel Unauthorized m Signage, Exclusion zone t of Area Officer
preparati entry, Poor access setup
on barricading
4 Blasting Air Structural damage, 4 5 20 High Pre-blast warnings, Pre-blast Blasting
initiation overpressure Injury, Hearing loss Vibration monitoring public Engineer
, Ground Hearing loss proper housekeeping notification
vibration, and removal of Fire
Flyrock bush vegetation and all suppression
fire combustible and like sand
flammable materials, water FE for
double ear protection small fires
(ear plug and muff) , and fire
decibel monitoring controllers
like fire
service for
huge fires
Fire
suppression
like sand
water FE for
small fires
and fire
controllers
HIRA – Hazard Identification and Risk Analysis. Document No. HSE/HIRA/2024/2
Rev. No. : 2
Date : 05/01/2025
like fire
service for
huge fires
5 Post- Presence of Delayed explosion, 3 4 12 Mediu Site inspection by
Additional Supervisor
blast undetonated Falling debris m trained personnel,
training on
inspectio explosives, Clearance certificate undetonate
n Loose rocks site inspection by
d ordnance
certified and trained handling
bomb handler clearance PPE as per
certificate , regular
MSDS
maintenance, and
inspection of blast
initiation system
6 Waste Environment Soil & water 2 3 6 Low Proper disposal as per Monitoring Environmen
disposal al pollution, contamination, Fire environmental guidelines of disposal tal Officer
Handling hazard sites
explosive
residue
