MC-SC-HSE-HIRA-000 Installation of Sanitary waste and venting piping system.docx

Saudi Constructioneers Ltd.
Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
OHSE Management System Page
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HIRA
No.: HIRA - 0 RISK ASSESSMENT: AREA / PROJECT: Mohammed Bin Salman City – Al Mishraq
THIS RISK ASSESSMENT MUST BE COMMUNICATED TO ALL EMPLOYEES INVOLVED IN THE ACTIVITY RECORD OF COMMUNICATION TO BE KEPT
TASK / OPERATION /
ACTIVITY DESCRIPTION: Installation Of Sanitary Waste and Vent Piping System
TOOLS &
EQUIPMENT IN
USE:
Crane, lifting gears, boom trucks, forklift, chain block, welding
machine, Threading/ Grooving Machine
Grinding Machine, Hole saw cutter, Drill machine, Pressure
gauge, Water and Spirit Level, Step ladder, Measuring tape,
Scaffolding, Forklift, Hand pallet trolley & various hand tools.
CLIENT: Mohammed Bin Salman City
IMPL. DATE: 2024.01.16
Risk Assessment Committee (To consist of OHS&E
Manager, CM, Site Engineer and representative for
workforce) RISK RATING =
LIKELIHOOD x
CONSEQUENCE
CONSEQUENCE (C)
The purpose of this Risk Assessment is to identify all possible hazards and risks associated with the works
and to identify mitigation and preventative control measures.
Name Signature 5 4 3 2 1
Nidhal Thiyab Al
Masri
LIKELIHOOD
OF
EXPOSURE
(L)
5 25 20 15 10 5
Johan Lessing 4 20 16 12 8 4
Rajesh Marath 3 15 12 9 6 3
CJ Dempers 2 10 8 6 4 2
Hazem Aldiri 1 5 4 3 2 1
Approved By Project
Manager
Signature
Omar Balkhi
LIKELIHOOD OF EXPOSURE CONSEQUENCE
5 CONTINUOUSLY (DAILY) 5 DISASTER MORE THAN ONE DEATH LOSS OR INJURY ≥ SR 100K
4 FREQUENTLY (WEEKLY) 4 VERY SERIOUS ONE FATALITY
SR 50K ≤ LOSS OR INJURY
< SR 100K
3 FROM TIME TO TIME / REPEATEDLY (MONTHLY) 3 SERIOUS
DISABILITY / PERMANENT
INJURY
SR 10K ≤ LOSS OR INJURY
< SR 50K
2 SOMETIMES / OCCASIONAL (AT LEAST ANNUAL) 2 SIGNIFICANT INJURY WITH LOST TIME
SR 1K ≤ LOSS OR INJURY <
SR 10K
1 RARELY (LESS THAN ONCE PER YEAR) 1 MINIMAL
MINOR INJURY WITHOUT
LOST TIME
LOSS OR INJURY < SR 1K

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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Ser
No.
TASK
(What one does in logical
steps)
HAZARDS ASSOCIATED
WITH EACH TASK
(What can cause harm?)
WHO CAN BE AFFECTED BY
THE RISKS (per hazard and
risks identified)
WITHOUT CONTROLS
WITH CONTROLS
RESIDUAL RISK
HARM / CONSEQUENCE
(What can happen / go
wrong?)
A B C
RISK
RATING
A B C
RISK
RATING
LIKELIHOOD
CONSEQUENCE
RISK
SCORE
LIKELIHOOD
CONSEQUENCE
RISK
SCORE
1.
Planning
Inadequate training,
consultation and
improvisation.
Saudico / Client /
Supplier / Supervision /
Skilled & Unskilled
Labour
Time delays, financial
loss, re-work, minor
to serious injuries.
4 5 20
High
 Method of work to be communicated.
 Planning of work to include input from the foreman and site engineer responsible for the
operations. Works to be supervised by a competent foreman / supervisor.
 Planning of works to include equipment to be used.
 Documented procedures to be handed to the responsible foreman.
 Method of operation to be communicated to all employees involved in the task.
 The responsible foreman is to complete the daily STARRT card prior to start of task and
communicate any additional hazards and controlled mentioned in STARRT card.
 Arrange training for threading/grooving machine, power tools or any additional
equipment from manufacturer.
 Internal training to be arranged for work at height, manual handling, LOTO awareness,
pallet trolley operation and fire prevention.
1 5 5
Low
2.
Delivery of pipes and
fittings and
offloading.
Arrangement for
materials loading and
offloading not in
place.
Saudico / Client /
Skilled & Unskilled
Labour
loss, re-work, minor
to serious injuries.
4 5 20
High
 Store keeper must coordinate with site team for storage area and stacking must be done
properly with secured stillage to keep the pipes intact.
 Arrange suitable plants & equipment such tele handler, boom trucks or cranes for
offloading materials.
 Truck driver must be inducted at gate and signed on driver’s instruction document.
 Allocate banks man for controlling delivery trucks and other equipment operation.
 Offloading area to be barricaded and control trespassing.
1 5 5
Low
Poor management of
plant and traffic
movement leading to
Run over by vehicle
and plant;
Hit by reversing
equipment;
Overhead
obstruction
Vehicle break down
Saudico / Client /
Skilled & Unskilled
Labour
Property damage,
minor to serious
injuries.
5 5 25 High
 Delivery vehicle drivers shall be subjected to induction regarding traffic plan
 Ensure vehicle complete documentation is available with the driver.
 Pedestrian should use pedestrian accesses provided
 Appoint full time flagman provided with lighted batons at night
 No vehicle should reverse on site without the reverse light on and flagman on board.
 Never allow anyone to stay next to the moving plant and keep distance from materials
being offloaded.
 Barricade 3 meter around equipment operation area.
 Allocate effective supervision to monitor the offloading.
 Stack pipes on rigid stillages to avoid slip and rolling down.
 Barricade location and ensure dunnage provided.
 Follow the supervisor’s instruction.
1 5 5
Low

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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3.
Materials shifting by
means of cranes,
boom truck,
telehandler.
Uncontrolled
operation. Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
minor to serious
injuries
5 5 25
High
 Ensure the riggers are trained and certified, and all the lifting gears intact (after
inspection by the rigger) before operations commences.
 Proper hitches must be employed during lifting of pipes and use slings appropriate to
the lifting operation. Lifting supervisor must advise.
 When moving, the load should not be raised more than necessary to maintain
reasonable clearance from the ground.
 Comply lifting procedures and use of cranes/boom truck.
 MC-SC-HSE-HIRA-007 Boom Truck- HIAB Lifting operations/ MC-SC-HSE-HIRA-008
Mobile Crane Operations/ MC-SC-HSE-HIRA-076- Tower Crane Operations to be
implemented and maintained at site.
1 5 5
Low
Failure to secure the
load; hit by the falling
load or object
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
minor to serious
injuries
5 4 20
High
 Secure the load with strap and use boxes to shift loose items.
 All webbing slings and lifting boxes must be inspected and certified by approved 3rd
party service provider.
1 5 5
Low
Open pits/excavation
in the work area, fall
from height.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
minor to serious
injuries
5 4 20
High
 All open pits/excavations must be demarcated, sign posted and barricaded.
 Excavations to be illuminated during night.
 LED string line shall be fitted on the barrier for night shift operation.
 Safe access and egress must be provided to excavations and pits.
1 5 5
Low
4.
means of hand pallet
trolleys.
Uncontrolled
movement of hand
pallet trolley.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
Severe crush injuries
5 4 20
High
 Hand pallet trolley must be inspected prior to use and ensure fit for use.
 Trolley operators must be trained on safe use. Never use on inclined areas.
 Load should be secured on trolley and allocate sufficient number of employees to
support the load.
 Avoid pinch points whilst moving.
 Defectives trolleys must be transferee in to quarantine area.
2 3 6
Low
Horse play
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
5 4 20
High
 Never horseplay on pallet trolley, responsible supervisor to retrain all operators to
avoid horse play on it.
2 3 6
Low
5.
means of vertical
stillage trolleys.
Uncontrolled
movement of stillage
trolleys.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
5 4 20
High
 Only use vertical stillage trolleys where pallet trolley not possible to shift materials.
 Load calculation to be acknowledged for scaffold tube stillage trolleys and ensure its
not exceeding the safe working load.
 Check the wheel and ensure in good condition.
 Allocate sufficient number of employees to support the stillage.
 Mechanical support to be made at inclined area.
2 3 6
Low

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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6.
Materials shifting
manually.
Pinch point and
manual handling,
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage,
musculoskeletal
disorder, hand injury
cut and bruises
5 4 20
High
 All people should be trained for correct manual handling.
 Allocate sufficient number of employees to assist the load.
 Heavy duty hand gloves to be provided.
 Follow manual handling technique and limit load to be 20kg per person.
 Use the correct PPE for the task.
 Ensure full-sleeved coverall is worn by the workers manually handling of Piping
materials to avoid injuries to the arms.
 Ensure excess amount or weights of Piping materials is not handled by individual
workers during manual transport within the site or stores.
 Ensure vision is not blocked by Piping materials placed on shoulders during manual
transport within the site or stores.
 Ensure manual transportation of materials on the staircase is well managed. Where
required, use lifting equipment (slings, pulleys, material baskets etc) to lift pipes unto
building floors.
2 3 6
Low
7. Material storage
Poor house keeping
causing slips trips
and fall.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage,
musculoskeletal
disorder, hand injury
cut and bruises
 Ensure accesses are kept clear
 Housekeeping is regular
 Supervisor ensuring operatives are stacking material correctly
 Adequate lighting provided
 Appropriate space is allowed around storage areas.

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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8.
Installation of
sanitary waste and
venting piping
system.
Work at height,
falling from height,
falling objects,
overloading,
protruding objects
Access and egress
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, Traumatic
brain and spine
injuries, Paralysis,
Broken bones, Organ
damage, Loss of
limbs etc.
4 4 16
High
 STARRT card briefing must be done before work commences
 Ensure PTW is in place
 Ensure proper working platform with fall protection in place
 Ensure full body harness with tie off
 Ensure scaffold platform are properly erected with ok to use tag
 Ensure castor wheels are locked
 Hand tools secured and tethered properly
 Avoid overreaching
 No unauthorised persons to modify scaffold
 Ensure 100% tie off above 1.8 meters.
 Persons not to lean over handrails.
 Maximum of two persons on the scaffold at any time.
 Workers to descend before any movement of the mobile scaffold.
 All materials on the scaffold to be secured – toolbox/containers etc.
 Materials on the ground to be placed away from general workers access/egress routes.
 Do not throw anything from or unto the scaffold- use material bags.
 Ensure free-standing, suspended materials that has not been coupled to larger
suspended materials are secured to the support rods with thick nylon ropes before
insulation commence.
 Never place any material on the top- or mid-rails of scaffolds. Keep pipes on the floor
until you are set to install it at once.
 Correct PPE to be worn at all times.
 Secure step ladder whilst working on it.
 Never over reach on ladder rungs.
 Always ensure 3-point contact.
 Do not carry any materials in hand while climbing and descending.
 Ladder training to be conducted.
1 4 4
Low
No or lack of
competent people to
operate power tools
and poor selection of
power tools.
Saudico / Client /
Skilled & Unskilled
Labour
Minor to Serious
injuries
Amputations
5 4 20
High
 Visually inspect tools before start of each working day.
 Tools to be inspected and colour coded as per procedure.
 Ensure good cable management, avoid tripping hazards.
 Use tools as per manufacturer’s instructions.
 Ensure drill bits are correct for the task.
 Ensure the RPM rating of the drills exceed the RPMs of the drill machine.
 Wear correct PPE for the task e.g. double eye protection when drilling.
 Keep appropriate distance from equipment’s working end when using – use the proper
manual handling techniques.
 Select suitable bit for drill machine.
 All power tool users must be trained from manufacturer.
 Ensure handle and guard is in place whilst using.
 Select suitable disk for grinder.
 Provide power tools appropriate to the task at hand.
 Ensure housekeeping at all times.
1 4 4
Low

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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Failure to obtain
permit to work in
shaft and confined
spaces.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
minor to serious
injuries
5 4 20
High
 Obtain permit for working inside the shaft.
 Lone working not allowed in shaft.
 In & out log should be maintained.
 Ensure overhead is protected. Provide adequate ventilation and lighting.
 Ensure safe working platform and access in place.
 Job rotation to be adopted and allocate watcher outside the shaft.
 Obtain permit to work inside the confined space.
 Gas monitoring to be conducted prior to enter.
 Allocate effective supervisor and trained watcher. Maintain in and out register.
 Ensure adequate ventilation and lighting in place.
 Perform hot work outside the confined space.
 Provide safe access.
1 4 4
Low
Machine operating
by un authorized
employee,
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
minor to serious
injuries
(amputation/crush
injuries)
5 4 20
High
 Only trained person operates the machine.
 The training will be delivered by manufacturer or supplier.
 Display the operator detail and training certificate at workplace.
 No training for unauthorised persons.
1 5 5
Low
8.
Use of lubricant,
solvent and paint
No or lack of spill
control leading to
spillages on site.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
asphyxiation, Minor
to serious injury.
4 4 16
High
 Ensure groups working with hazardous chemical are given internal training before
engaging them on the job task.
 Ensure strict adherence to the lubricants, paint and solvents SDS and ensure workers are
sufficiently familiarized with its content through daily TBT.
 Provide correct fire extinguisher nearby at all times at the work area.
 Ensure correct PPE is used for the task e.g. clear goggle, chemical masks, rubber gloves
etc. Make sure sufficient signage is in place.
 A spill disposal kit shall be kept nearby at the paint workshop/ area/spot.
 Clear plastic sheets shall be placed underneath materials on which paint is being applied
to collect scattered chemicals.
 Never carry out chemical applications simultaneously, or in close proximity to hot works.
 COSHH materials shall not be stored in excess of the quantity required for finishing tasks,
on the site.
 Ensure correct storage of chemicals/paints at the work area.
 Provide adequate drip-trays for paint buckets.
 Ensure hazardous wastes are promptly and correctly disposed of.
 Ensure proper ventilation (forced or natural) is maintained at critical pipe painting
locations.
1 4 4
Low
9.
Cutting and joining
pipes, cutting of
steels to install pipes
Hot work, use of
defective hand tools
and poor selection of
hand tools that can
cause fire.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
fire, ergonomics and
repetitive Strain
injury and maiming.
4 4 16
High
 Hot work permit to be obtained
 Proper access to be provided
 No work without edge protection or fall protection in place
 Supervision mandatory
 Inspection of area before permit to be issued.
1 4 4
Low

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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Using chain block
without inspection
and certification.
Being hit by falling
object
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
Minor to serious
injury.
5 4 20
High
 All chain blocks and lifting gears must be inspected and certified by approved 3rd
party.
 SWL must be clearly marked.
 Lifting gears to be stored on hanging position.
 Ensure internal inspection and colour coding completed prior to use on site.
 Any defects on lifting device and gears must be discarded.
 Barricade pipe hoisting area until secure the installation.
1 5 5
Low
Cutting and g
r
i
n
d
i
n
gin
elevated positions.
Falling sparksand
offcuts.
Saudico / Client /
Skilled & Unskilled
Labour
loss, property
damage, re-work,
fire, explosion, Minor
to serious injury.
4 4 16
High
 When working in elevated positions with cutting equipment the use of fire blankets
is compulsory, fire spotters must also be placed at lower levels as to warn others of
the activity above and to extinguish any fires which s
t
a
r
tup as a result of falling
sparks.
 No flammable or combustible materials in vicinity.
 Demarcation shall be erected to prevent persons entering the drop zone.
 A fire watcher shall remain in thework area up to ½ an hour after the task has been
completed.
1 4 4
Low
Fire / Explosion
during electrical
Saudico / Client /
Skilled & Unskilled
Labour
Time delays,
financial loss,
property damage,
re-work, fire,
explosion, Minor
to serious injury.
4 4 16
High
 Hot work permit must be taken and all precautions mentioned in the permit to be
followed.
 Keep combustible materials away (11 meter / 35 feet) from hot work area, if not
possible properly covered with fire resistant clothes / fire blankets.
 Do not carry out any hot work operation on a closed container. (E.g. Paint or
chemical container).
 Battery power shall be disconnected prior to start any welding job on Plants,
equipment’s and vehicles.
 Fire Protection systems / equipment’s to be made available prior to start any hot
work. Protect the affected area with Fire Resistant Cloths to Contain Sparks / Hot
Slag.
 A continues fire watch as recommended in the permit must be carried out after hot
work.
 Connect the welding ground cable clamp to the work piece as close as possible to
the area being welded.
 Keep all electrical cables are in good condition, and ensure all terminals are
fastened properly.
 Do not carry out any hot work operations in confined space before taking adequate
safety measures.
 All hot works to be closely monitored by a competent supervisor. Area HSE officer
to check randomly.
 The electrode to be removed when it was being not used to avoid unintentional
contact.
 A fire-resistant container will be provided for spent electrode stubs.
 Ensure equipment is calibrated as per the required duration.
1 4 4
Low

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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Failure to inspect
electrical equipment
leading to
electrocution.
Saudico / Client /
Skilled & Unskilled
Labour
Time delays,
financial loss,
property damage,
re-work, fire,
burns, cardiac
arrest, seizures
etc. Minor to
serious injury.
5 4 20
High
 Electric in charge to check welding machine, electric cables to ensure they are fit to
use.
 Do not put the cables through wet surface. All electrical equipment’s to be
connected through ELCB and body to be grounded or double insulated.
 Standard industrial type plug & sockets to be used for connection.
 Terminal connection box to be well insulated / covered.
 Do not touch the electrode / metal parts of the electrode holder with skin or wet
cloth.
 Do not touch your body on the electrode and work piece / welding ground clamp at
a time.
 Do not operate the machine with covers removed / opened.
 Connect the welding ground clamp to the work piece as close as possible to the
area being welded.
 PPE (Hand gloves) to be used and ensure it is not wet.
 Ensure equipment inspected by competent person and colour coded.
 Defective equipment will be removed from use and arrangement for repair will be
made.
 Electric welding cables are to be kept as short as possible and routed away from
pedestrian walkway areas. Electric welding operations will only be undertaken with
earth return electrodes connected to the work piece.
 All connections between welding equipment and welding cables will be securely
bolted.
 Pipelines containing electrical cables will not be used as a ground. Welding
machines will be turned off when being moved or when the equipment is not in
use.
1 4 4
Low
No work permit
Saudico / Client /
Skilled & Unskilled
Labour
Property damage,
time delays,
financial loss,
minor injuries,
possibility of
fatality.
4 4 16
High
 The responsible foreman is to ensure that the required work permit has been
obtained and signed prior to start of the work.
 HSE Officer to verify that the required inspections as indicated on the work permit
has been done.
 Work cannot proceed until the PTW has been signed off by a competent person.
 MC-SC-HSE-HIRA-046 Hot Work Operation Day and Night shift works to be
implemented and maintained at site.
1 4 4
Low
Work at Heights
Mobile elevating
work platform
Collision.
Saudico / Client /
Skilled & Unskilled
Labour
Lacerations, cuts,
fracture, disability
and fatality.
Property damage.
5 4 20
High
 All MEWP movement and lifts to be controlled by certified Banks man / Rigger.
 Only Trained WAH personal shall perform the task.
 QC team to ensure any WAH is carried out with site specific safety requirements.
 Area to be demarcated.
 Conduct risk awareness through TBT.
 Conduct TBT training to include the use of MEWP.
 MEWP / platform areas and braces be protected from vehicular movement.
 Restrict the movement of mobile equipment.
1 5 5
Low
Shaves, sharp
objects/edges, etc.
protruding from
pipes.
Saudico / Client /
Skilled & Unskilled
Labour
Laceration, Cuts
and bruises. 4 4 16
High
 Ensure good housekeeping workplace to clean shaves and dust.
 Always use hand gloves while handling pipes.
 Grinding to be done to prevent sharp edges before taking to installation. 1 4 4
Low

Document Reference
MC-SC-HSE-HIRA-079
Dated: 2023.02.12
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10. Hydro-testing
Release of
uncontrolled energy.
Saudico / Client /
Skilled & Unskilled
Labour
Property damage,
time delays,
financial loss,
minor injuries,
possibility of
fatality.
5 5 25
High
 Ensure Hydro-Test-specific caution tapes and sufficient signages are placed around
the perimeter of the area being tested.
 Ensure the correct exclusion zone is implemented as per the Hydro-Test
calculations.
 Worker/inspection parties shall keep a safe distance away from all joints during
pre-inspection, and inspection checks for leaks. Ensure gauges have a current
calibration certificate and is correct for the task.
 Mechanical pump shall be manned at all times for the duration of the test. Both
ground level and elevated level tasks involving electric-powered tools/ machineries
etc. shall be moved away from the test area.
 Any temporary DB at location to be covered with plastic sheets during test.
 All works at height (in close proximity to lines being tested) are to be temporarily
stopped once pressure gauge is in the 1bar range, until test is complete and the
water is released, to prevent contact with pressured pipes Note – Hydro-testing: as
a minimum should include the following precautions: A safe working distance to be
established with regards to volume of the line (s) to be filled and the testing
pressure.
 A stored energy (SE) calculation for the system should be prepared including
piping-instrumentation and equipment included in the test.
 All persons involved in the Hydro testing will be fully conversant with all the
requirements of the Method Statement.
 During the test, the exclusion zone will be barricaded off, and warning signs
erected.
 Authorized personnel (wearing correct PPE) only to enter the test areas/exclusion
zone.
 Warning alarm to be given before the test commences. Test schedules to be
advertised on site notice boards.
 No other work allowed in the test areas.
 List of equipment and certifications to be produced.
 Emergency response arrangements must be in place.
 SC-OHSE-FOR-GEN-097 Hydro Pressure testing PTW to be implemented.
1 5 5
Low
11. De-watering Un controlled
Release of water
Saudico / Client /
Skilled & Unskilled
Labour
Property damage,
time delays,
financial loss, minor
injuries, possibility
of fatality.
4 4 16
High
 Ensure pumping (pressuring machine) is turned off prior to de-watering.
 Do not release water directly from the mains valve.
 Insert a channeling hose to direct pressured water flow into the appropriate
collecting tank/ditch etc.
 Hose shall be firmly secured to prevent it from flailing.
 Valve shall be cracked open gradually to release water.
 If ditch is been used to collect and dispose water, ensure they are dug laterally
away from any existing underground cables/utilities.
 Test shall not be considered as completed nor the area cleared for other works
until all pressured lines has been de-pressurized and de-watered.
1 4 4
Low
Std PPE: Hard Hat, Safety Glasses, High Vis Vest, Coverall, Steel-
cap Safety Shoes.
Additional PPE: Apron, welding shield, face shield, ear defenders, ear plug.

MC-SC-HSE-HIRA-000 Installation of Sanitary waste and venting piping system.docx

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