CONSTRUCTION OF INTERNAL ROADS FOR THE

COMMERCIAL DISTRICT AT DUQM

METHOD STATEMENT FOR REROUTING EXISTING

LIVE WATER LINE HDPE PIPE LINE AS PER THE
PROPOSED LEVEL AND REMOVAL OF EXISTING
LINES.
REVISION /APPROVAL STATUS
PREPARED BY REVIEWED BY APPROVAL APPROVED
REV DATE DESCRIPTION
AL-HADAD AHAR AAW DATE

0 01-04-2023 FIRST ISSUE ASIM ANWAR

Contents
1. Location & Description of the project..............................................................................................3
2. Scope of works Covered....................................................................................................................3
3. Reference Documents........................................................................................................................4

C142-2022 CONSTRUCTION OF INTERNAL ROADS FOR THE COMMERCIAL DISTRICT AT DUQM

4. Definitions and Abbreviations..........................................................................................................4
5. Personnel Required and Designated Responsibilities.....................................................................5
6. Subcontractors Utilized.....................................................................................................................6
7. Tools and Equipment Required........................................................................................................6
8. Prior activities to be completed........................................................................................................7
8.1 General.......................................................................................................................................7
Survey Works And Marking....................................................................................................................7
9. Methodology.......................................................................................................................................7
10. Quality Control and Quality Assurance:.........................................................................................9
11. Hazard Identification, Risk Assessment & Determining Controls (HIRADC):..........................10
12. Emergency Procedure.....................................................................................................................10
13. Appendix..........................................................................................................................................11

1. Location & Description of the project

The Public Authority for Special Economic Zones and Free Zones assigned
the project to construct and improve the internal roads of the commercial
district in the Special Economic Zone at Duqm.
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 The project serves the commercial district through 10 connections,
distributed in three sides of the district and connected to the road of the rock
garden district, Sayy Road from the south, and National Road 32 from the
west. The commercial district is located 9 km southwest of Duqm Port and 13
km north of Duqm Airport. This document covers the methodology and
techniques to be implemented for the utilities trench, Structure, Road way
excavation.

2. Scope of works Covered

This method statement describes the REROUTING
OF EXISTING LIVE WATER LINE HDPE PIPE LINE AS PER THE
PROPOSED LEVEL AND REMOVAL OF EXISTING LINES.

The scope of works covers the following:

 Existing HDPE 355- PN -16 transmission HDPE pipe live line cutting
and removing.
 Removing of AIR Valve chamber No.01 for HDPE 355mm
 Installation of New pipeline HDPE 355 MM of PN-16
 Construction of reinforced concrete gate Valve chamber (3x3x1.8) of
DN 300mm PN-16 GATE VALV
 Providing hard barriers around the excavated area.
 Bedding preparation for Pipe Laying.
 Pipe shifting from Store area to Excavated trench area.
 Pipe Laying in excavated trench.
 Jointing.
 Air testing
 Surrounding.

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C142-2022 CONSTRUCTION OF INTERNAL ROADS FOR THE COMMERCIAL DISTRICT AT DUQM
  Warning tape laying.
 Final dressing and Formation Level Preparation.

3. Reference Documents
 Contract Documents
 Construction Drawings / Shop Drawings
 Project Schedule / Construction Program
 Project Special Specification

4. Definitions and Abbreviations

 PQP - Project Quality Plan
 QA/QC - Quality Assurance & Quality Control
 QEHS - Quality, Environment, Health &Safety
 S/C - Sub-Contractor
 ITP - Inspection and Test Plan
 HIRADC - Hazard Identification, Risk Assessment & Determining Controls
 SME - Small & Medium Enterprises
 PE - Polyethylene
 MAS - Material Approval Submittal
 MRIR - Material Receipt Inspection Report

5. Personnel Required and Designated Responsibilities

 Project Manager (PM) - Organize & manage all resources and field activities to achieve
an efficient and effective completion of the contract, within the agreed time and cost,
whilst paying due regard to safety and meeting Quality requirements.
Ensure the construction activity as per approved construction & work methods.
 Site Engineer (Civil) - Prepare construction method statements, work methods and
obtain approval for the same for civil works.
 Site Engineer (Utilities & Pipeline) - Co-ordination with the construction team for safe
excavation procedure to existing utilities and liaison with relevant authorities when
required.
 Land Surveyor - To establish control points as per survey plan.
 Construction Superintendent - Front line supervision of the workman.
 QA/QC Engineer - Set up and monitor QA/QC activities at site.
 HSE Officer - Implementation of the project HSE plan.
 Flagmen/Banksman – To indicate the operator to hold and proceed with the work.

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C142-2022 CONSTRUCTION OF INTERNAL ROADS FOR THE COMMERCIAL DISTRICT AT DUQM
  Electrician - To prepare required power connection and illumination.
 Foreman- To direct work for the workman.
 Operators-To operate excavators, Dozer, Etc.
 Drivers -To drive the vehicles required for excavation operation
 Helper - To help the skilled workman.
 Riggers- To align pipe
 Welders-For welding

The detail responsibilities of above-mentioned personnel are mentioned in the approved

Project Quality Plan.

6. Subcontractors Utilized
The Criteria for fixing the subcontractor will be mainly as per the requirement of
Project. The Sub Contractors will be analysed according to their previous work experience
of the similar nature, their Company profile, their ability to execute the work as per the
project specification and up to the satisfaction of the Client. More weightage will be given to
the Subcontractors who are registered with the SME.

Before the deployment of every Subcontractor, we shall submit their relevant document to the
Client for their approval. We shall also insist the Subcontractor to get themselves registered
with Salalah Free Zone Company S.A.O.C. Once the subcontractor is approved by the Client,
the necessary HSE induction will be given to them to understand them the requirement of the
Client as well as ours.

7. Tools and Equipment Required

 Excavator
 Plate compactor
 JCB
 Hand saw / Hack saw
 Files round/flat
 Measuring tape
 Sprit level, Plumb, Chalk line
 Grinding Machine.
 HDPE (High Density Polyethylene) butt fusion welding machine

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 8. Prior activities to be completed

8.1 General
Request for Inspection form will be raised to Client before commencing of
work. All necessary documents such as checklist, key plan, approved
relevant drawing as reference, survey report, etc. will be attached in the
Request of Inspection before submitting. Plastic barriers will be placed
around the area to be excavated. Access to the excavation area will be
restricted and controlled by Foreman during all activities.
Survey Works and Marking
The surveyor shall set-out the approved levels at site before
commencement of works, the same shall be checked and verified by the
engineer’s representative to site.

9. Methodology
1.1 Receiving materials:
 The material received is as per approved MAS.
 The quantities are correct as per the purchase order and delivery note.
 The materials are in the manufacturer’s original packing.
 Once the material is received at the site, MIR shall be raised for material inspection
and obtain approval to use at site.
 If material observed to be not as per approved MAS, the same will be removed from
site within 24hrs.
1.2 Handling / Storage and Transportation of materials at Site:
 Prior to unloading, it shall be ensured that the stack area is free from sharp
projections, stones or other protuberances.
 Pipes may be off-loaded from the vehicles manually.
 Care shall be taken to avoid damage of spigot and socket during transit, holding and
storage. Pipes shall never be dragged on bare ground.
 Pipes shall not be stacked in large random piles.
 Socket pipes and those with anchor seal joints shall be stacked in layers with sockets
placed at alternate ends of the stack and with the sockets protruding apart.
 For ideal storage, pipes shall be uniformly supported and properly protected with
Tarpaulin sheets around to prevent direct exposure to sunlight.
 Each layer of pipe stack shall not exceed 1.5 meters in height.

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  When loading pipes on to vehicles, care shall be taken not to allow them to come in to
contact with any sharp corners such as loose nail heads as pipes may be damaged by
being rubbed against these during transit.

1.3 Pre-Installation:
1.3.1 Trench Preparation and Removal of Existing Pipeline & Air Valve Chamber
 Centerline marking and excavation dimensions shall be done as per the Approved
drawing including clearance from the face of any structure For Removal of Existing Pipe
Line and within necessary working space.
 Adequate signage shall be placed near the excavation.
 Remove the existing Pipeline from the Trench.
 Removing of Air Valve Chamber.
 Trench inspection shall be carried out as Per approved Excavation MST&ITP
 The trench bottom shall be carefully examined for the presence of hard objects, rocky
projections or large tree roots and shall be trimmed to an even finish.
 Depth of bedding shall be as per approved drawing.
 It shall be ensured that the Bedding material is free from large stones and granular
material crushed stone (Aggregate)
 Initial filling material shall be crushed stone (Aggregate)

1.3.2 Installation Procedure:

 Check the availability of latest approved IFC and shop drawing.

 Check the size and class of the pipes & fittings as per drawing / Material submittal.
 On ensuring the work front availability, required quantity of pipes and fittings for
installation (as per approved shop drawing and site conditions) shall be shifted
from stores to site.
 The pipes will be laid with temporary supports flush
 Wherever necessary, suitable bends will be provided according to manufacturer /
project specifications. Bending of pipes will not be done in such cases.
 Slope of pipe shall be maintained as per the approved shop drawing
 We shall provide the flexible joints where pipes are built into structures.
 We shall place the first joint not more than one pipe diameter from face of structure
and second not more than the following distances away from first:
i. Pipelines not exceeding 450 mm: 2 pipe diameters.
ii. Pipelines over 450 mm and not exceeding 1000
iii. Pipelines over 1000 mm: 1.8 m.

13.3.3 Pipe Welding

Butt heat fusion welding of HDPE pipes shall be in accordance with DVS 2207-1.

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The butt-welding method is the most commonly used method of joining HDPE pipes. No extra
material is used instead the surface to be joined is heated by means of a heating plate.

The melted surfaces are then pressed together and will fuse into each other forming a strong
joint. The strength of the material is based on the fusion of atoms.

Welding beads shall not be removed and are usually kept as a visual reference for the
welding quality.

Welding machines (heat fusion machines) have strong body frames, guide rods for the pipes,
a pipe end planer, and an electric heater plate.

The compressive thrust is produced hydraulically or by means of a lever or spring

mechanism. To achieve a good welding result, it is better to use a proprietary heat fusion
machine.

Generally, the butt-welding operation is divided into the following steps.

 Create permissible working conditions.

 Connect the welding device to the mains or to the alternating current generator and
check its function.
 Clean the joining faces beyond the welding area with a cleaning agent and unused,
absorbent, non-dyed paper.
 Align and scrape hdpe pipe ends with the planer.
 Close the hdpe pipe ends against draughts.
 Check the alignment.
 Check the heating tool temperature.
 Clean the tool with a cleaning agent.
 Heat up surfaces to be welded.
 At the end of the heating cycle, detach the joining faces to be welded from the tool and
move the latter out of the welding position.
 Drive the pipe ends together by applying the correct fusion pressure as indicated in the
welding table, while monitoring the welding bead formation.
 Unclamp the welded parts (hdpe pipes, hdpe pipes fittings, etc.) when the cooling time
has elapsed.
 Inspect visually for any visible anomalies.

13.3.4 Measures Before Welding

The welding area shall be protected from unfavorable weathering influences (e.g., wind, rain,
high humidity levels, etc.).

The preferred ambient working temperature for welding is in the range of +5°C to +45°C. If
necessary, protecting the welding area with a tent or similar arrangement shall be arranged to
maintain a constant environment in the working area.

13.3.5 Conducting Survey and Laying Out the HDPE Piping

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All pipes shall be laid in trenches at the required depth below the surface as per approved
shop drawing and road details.

Pipes crossing the roads shall be protected fully and embedded in the sand.

All pipes, fitting etc. shall be carefully lowered into the trench with suitable equipment in a
manner that will prevent damage.

When work is not in progress, the open ends of the laid pipeline shall be securely plugged.

Install all pipes in accordance with the manufacturer’s recommendation, fixing each item
firmly in position, level, plumb, and properly joined.

If necessary, special foundations or other fixing supports/blocks must be provided.

To prevent the pipeline from floating, the backfill must be sufficient to prevent the pipe from
being exposed to foreign objects.

Any pipe that has floated must be removed from the trench and reinstalled in a dry trench.

After the various system components have been installed, all of the equipment and

surrounding areas should be adequately cleaned before final
closing. Any foreign material that is still on the equipment and in the surrounding areas should
be removed.

13.3.5 Cleaning

The joining faces of the HDPE pipes, hdpe pipes fittings, tools, and the heating element must
be clean and free from contaminations (oils, fats, grease, chipping, etc.). The paper used for
cleaning must be unused, absorbent, non-fraying, and undyed.

The element must be cleaned with paper before every welding operation. No residues of
cleaning agent or paper shall remain on the element.

The hdpe pipe ends to be joined shall be scraped immediately before the beginning of the
welding.

Any chips must be removed prior to welding of hdpe pipes.

13.3.6 Preparation for the Welding

The heating element temperature shall be checked before the start of the welding pipe work.
A high-speed thermometer shall be used to control the element temperature prior to each
welding process.

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Control measurement must happen within the area of the heating element which corresponds
to the pipe surface. In order to achieve a thermal balance, the element should be used not
before 10 minutes after reaching the required temperature.

For optimal welding, the element shall be cleaned with unused, absorbent, non-fraying, and
undyed paper prior to the start of every welding process. The non-stick coating of the element
must be undamaged in the working area.

In addition, during the HDPE pipe work welding process by slow movement of the workpieces
occurs a movement pressure or movement power which can be seen on the indicator of the
welding heat fusion machine and should be added to the first determined joining power of
joining pressure.

The nominal wall thickness of the parts to be welded must correspond to the joining area.
Before clamping the pipes in the welding heat fusion machine, they must be aligned axially.

The areas to be welded should be cleaned immediately before the welding process with a
clean, fat-free planner tool so that surfaces are aligned in the clamped position. The following
table provides the permissible gap widths under adapting pressure:

Pipe diameter, d
Permissible gap width (mm)
(mm)

≤355 ≤0.5

400 <630 ≤1.0

630 <800 ≤1.3

800 <1000 ≤1.5

1000 ≤2.0

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Together with the control of the gap width, any misalignment of HDPE pipes should also be
checked.

The misalignment of the joining areas to one another should not overstep the permissible
degree of 0.1 x wall thickness on the pipe outside or on the table respectively.

Prepared and cleaned welding surfaces shall not be left open for an extended time, nor shall
they be touched by hands otherwise a renewed preparation (cleaning, scraping, etc.) is
necessary.

13.3.7 Welding of HDPE Pipes

 Place the heat fusion machine on even, horizontal, and dry ground.
 Check that the right sizes of clamps are fitted into the machine.
 Place the supports line up by eye.
 Pull the pipe into fixed clamp, longer pipes always should be on the fixed pipe clamp
side.
 The pipe end should be 50mm outside of the pipe clamp to allow trimming and
heating.
 Adjust supports to ensure the pipe is in line both vertically and horizontally with the
machine.
 Lift upper pipe clamp onto the machine. Screw-on pipe clamp nuts. Upper bolts
protrude through holes in the upper pipe clamp, bottom then aligns automatically.
 Tighten the pipe clamps nuts by hand or socket spanner.
 Load shorter pipe into movable pipe clamp side. The pipe must be aligned so that
when ends are not straight, they initially are loaded into the machine point to
facilitate straight trimming.
 Check the position of the movable pipe clamp. The clamp should be in a fully open.
 position to allow proper heating and welding, if the clamp is in a closed or nearly
closed position the moving range of the clamp (hydraulic cylinders) is not enough
and the forces during welding will load the body frame of the machine only.
 Adjust supports to ensure the pipe is in line both vertically and horizontally with the
heat fusion machine.
 Tighten pipe clamp nuts. Pipe clamp nuts should be tightened to give coarse
alignment of pipe ends. Bottom nuts will move pipe end up. Top nuts will move pipe
end down.
 Adjust pipe ends for fine alignment with the centering blocks.

13.3.8 Trimming of HDPE Pipe Ends

 Clean planer disc on both sides.

 Clean pipe ends of each pipe (20mm) using lint-free cloth and fluid (Ethanol).
 Align gear in the center of the gap.

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  Place planer into the machine. Ensure planer is the incorrect rotating direction to cut.
 Lock planer into place with planer holder.
 Start the planer motor.
 Move movable pipe clamp until it touches the planer’s face.
 Trim the pipe ends (Safety measures while trimming are included in the health and
safety section).
 Allow hydraulic pressure to fall to “0” zero. Planer will be rotating freely.
 Open hydraulic valve.
 Open the machine.
 Turn off the planer motor.
 Remove the planer.
 Remove cuttings from pipe ends. Only use a cloth to remove cuttings from inside the
pipes.
 Close machine and check alignment of end faces.
 Repeat trimming if pipes faces are not properly aligned face to face.
 Close movable pipe clamp side.
 Note and record friction force (also called “drag force”).

13.3.9 Temperature Setting

The fusion welding process requires the pipe surfaces to be joined, to be warmed up to the
required welding temperature by means of a heating element prior to them being joined
together under pressure. The element temperatures are listed in the following table.

Generally, the aim is to use higher temperatures for smaller wall thicknesses and lower
temperatures for larger wall thicknesses.

PE PP PVDF ECTFE

Heating
Element 200 up to 200 up to
232 up to 248 275 up to 285
Temperature 220 220
(Degrees C)

PE-(Polyethylene), PP- (polypropylene), PVDF-(Polyvinylidene fluoride),ECTFE-

(Ethylenechlorotrifluorethylene)
Heat the plate to the required temperature range of 200-220 °C.

Check the temperature and the spread of temperature over the entire heater plate by means
of a surface thermometer. Variation of the temperature over the surface should not be more
than 10 °C from the set value.

13.3.10 Heating of HDPE Pipe Ends

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  Clean the heater plate surface using a cleaning agent which should be a 100%
vaporizable solvent.
 Place the heater plate into the machine between the pipe surfaces to be welded.
 Move the movable pipe clamp side until trimmed pipe ends touch the heater plate.
 Close the hydraulic valve and apply heating pressure.
 Attach heater plate chains (if applicable) in order to separate pipe ends from the
heater plate and allow removal of the heater plate.
 Observe the formation of beads against the heater plate. The bead should be uniform
around the whole circumference of the pipe. The bead should normally be formed in
a few minutes depending upon the diameter and wall thickness of the pipe. If major
deviation occur, recheck welding conditions and start again.
 When the bead has been formed, reduce the hydraulic pressure (P1) to maintain the
pressure (P0) through the post heating period (t2) to allow deep plasticizing of pipe
wall. If the heating time is too short, the molten material may be totally squeezed out
when pipe ends are pressed together and fusion takes place between un-plasticized
cold surfaces.
 Open the movable pipe clamp so that pipes ends are clearly separated from the heater
plate.
 Remove the heater plate. Do not pull the plate along the pipe ends or twist it because
the plasticized area may be distorted. Check both pipe ends by eye for bead
damage. The removal time of heater plate shall be minimized as specified in
welding parameters cycle (t3).
 Close the movable pipe clamps by means of the hand lever.
 Close the hydraulic valve and apply the welding pressure (t4). Increase the pressure
gradually to the required pressure (P1).
 Observe the size and the shape of the formed welding bead, which should be even on
the entire circumference of the pipe.

13.3.11 Cooling of HDPE Pipes

Maintain the pressure throughout the cooling period (t5). Cooling should not be accelerated
for instance by water or air. Proper cooling time as per welding parameters under pressure
must be ensured to create a strong joint.

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13.3.12 Removal of Pipes

 Open all centering blocks, dismantle fastener if welding a stub end.

 Check that hydraulic pressure is fully released.
 Open the pipe clamps and remove the upper sections from the machine.

13.3.13 Flange Joints

The construction length of the neck must be taken into consideration when welding
necks are joined to the pipe using the butt-welding process.

For short welding necks that do not have sufficiently long cylindrical ends for clamping,
welding machines with a neck holder must be used, if possible. In particular, this applies
whenever, due to constraints, the loose flange has to be pushed over the neck before
welding.

When integral flanges are to be welded, it must be ensured that the bolt holes are
arranged symmetrically to both main axes of the pipe.

When installing butterfly valves in thick-walled thermoplastics pipe system, it must be

ensured that the disc can be opened totally without hitting the inside surface of the pipe.

If possible, butterfly valves that are adapted to plastic pipes and whose disc is adjusted
to the reduced inside diameter of the pipe shall be used.

Loose flange, welding neck, integral flange, seal, and the loose flange shall be aligned
centrally with the pipe axis. When aligning the seal, it must be checked whether the seal
dimensions conform to the outside and inside diameters of the welding neck.

Before the bolts are tightened, gasket faces of the welding neck, neck bush, or the
integral flange must be located parallel to one another and must be in close contact with
the seal.

13.3.14 Joint Numbering and Report

After completing a welded joint, a unique number shall be given for traceability and
recording purposes. The given number shall be clearly visible and must be written
adjacent to the welded joint. This number shall allow the tracing of the welder name and
the date of the weld on the welding log sheet.

The welding log sheet is prepared by the qualified welder and checked by the
responsible QC Engineer and/or Project Engineer.

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13.3.15 Inspection of HDPE Piping, Fittings, and Joints

Welding is attended to and inspected visually for the size and evenness of the bead as well
as the matching of pipe ends to each other.

Welding inspection is done as per DVS 2202 standard.

 No bubbles or pores in the welding joint are allowed.

 Joint number is noted and recorded.
 Inspection is visual and based on the respective size and shape of the pipe/fitting
bead.
 V groove depth of bead is also noted.
 Other methods applied are destructive material testing procedures for hdpe involving
bending and tensile tests of sample pieces cut from the weld area of the pipe.
Destructive test will be done on dummy joint on site and as specified under the
welding principles.
 Visually unacceptable joints should be cut out and re-welded using the correct
procedure.
 All parameters shall be maintained as per standard welding tables.
 All actual welding mechanical parameters shall be recorded in the weld log sheet.
 Welding specialist shall follow and record the welding parameters for each joint.
.

1.4 Testing
a) Pre- Testing
Inspection shall be carried out as per the sequence referred in Inspection Test plan for
installation and testing of sewage network system – UPVC Pipe & Fittings during
construction & before backfilling.

b) Air Testing
Air testing shall be done as per clause no 8.2.3.9 of OMAN standard specification volume no
3.
 As soon as practicable after a length of pipe has been completed, it shall be subjected to an
air test to BS EN 1610
 Length of pipe shall be plugged and sealed and air pumped into the pipe by approved
method.
 We shall allow 5 minutes for stabilization of air temperature and adjust pressure to 100 mm,
the section will not be considered satisfactory if the air air pressure fails from 100 mm to 75
mm head of water in 5 minutes or less
 Failure to pass the air test is not conclusive and if no leakage can be traced by externally
application of soapy water to all sealing areas.

c) Inspection & Clearance

 Visual checking of all joints will be done for any leakages.
 Inspection request shall be raised for Engineer’s inspection for Pipe Laying and testing.

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 In case of no leak, clearance shall be obtained from Engineer for top bedding and further
backfilling.

10. Quality Control and Quality Assurance:

Please refer to Appendix 1 for Inspection and Testing Plan &

Checklist.

11. Hazard Identification, Risk Assessment & Determining

Controls (HIRADC):

Please refer to Appendix 2 for Hazard Identification, Risk Assessment

& Determining Controls.

12. Emergency Procedure

 All fatality or series injuries, hospitalization for a period in excess of 24

hours and Partial disability shall be reported to the relevant authority.
 Company shall corporate with investigation team and will take necessary
corrective action which ever will be suggested by the investigation team.

 EMERGENCY SERVICE

SL EMERGENCY SERVICES EMERGENCY CONTACT NUMBER

NO
1 ROYAL OMAN POLICIE 9999
2 CIVIL DEFENCE FIRE SERVICE 9999
3 BADAR AL SAMAA HOSPITAL 22826435
4 FIRE 25222222
5 ELECTRICITY 71210902

 EMERGENCY CONTACT NUMBER

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 SL EMERGENCY CONTACT DEPARTMENT/ CONTACT
NO PERSONS COMPANY NUMBER
1 JULIUS SNCHEZPASIA TATWEER 99286578
2 SAIF AL AMRI TATWEER 98050876
3 PETER AWAD AAW & PARTNERS 96213306
4 SUNIL KUMAR ALHASHEMI & AL 93213580
RAWAS
5 L.K. PRADHAN ALHASHEMI & AL 91772739
RAWAS
6 PRAMODKUMAR ALHASHEMI & AL 93213581
RAWAS
7 HANEEFA ALHASHEMI & AL 93211994
RAWAS
8 DURAI BABU ALHASHEMI & AL 99096569
RAWAS

 PERMIT REQUIREMENTS

DEPARTMENT UTILITY
TANWEER ELECTRICITY
MARAFIQ WATER
OOREDOO TELECOM
ROP TRAFFIC
SEZAD PERMITS
ENVIRONMENT ENVIRONMENT
HERITAGE ARCHEOLOGICAL

13. Appendix
 Hazard Identification, Risk Assessment & Determining Controls
(HIRADC)

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