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This document remains the property of McConnell Dowell. Its contents are confidential and shall not be reproduced, destroyed or given away without the express, written permission of McConnell Dowell. The electronic version of this document is the master copy and is a controlled document. Unless specifically noted thereon, hard copies of this document are uncontrolled.

McConnell Dowell (Malaysia) Sdn Bhd

CLIENT: ONE IFC RESIDENCE SDN BHD

PROJECT: PROPOSED TUNNEL LINK BETWEEN MRT STATION AT MUZIUM NEGARA

AND ST REGIS HOTEL

LOCATION: KUALA LUMPUR, MALAYSIA

PROJECT NO: 2641

CONSTRUCTION EXECUTION PROCEDURE

DRILLING AND INSTALLATION OF INSTRUMENTS

Document Number: 600-V011-2641 Revision History

Rev Date Description By Checked Approved

0 13 May 2014 Issued for Approval NL SS

Based on J001-600-100 Rev4 of 6

TABLE OF CONTENTS

1.0 PURPOSE & SCOPE .................................................................................................................. 3

2.0 REFERENCES ............................................................................................................................ 3

2.1 STATUTORY REQUIREMENTS/DRAWINGS ......................................................................... 3

3.0 CONSTRUCTION METHODOLOGY .......................................................................................... 3

3.1 SUMMARY ................................................................................................................................ 3

3.2 WORK METHOD ...................................................................................................................... 3

3.2.1 DRILLING BOREHOLE ....................................................................................................... 3

3.2.2 INSTALLATION OF INSTRUMENTS .................................................................................. 4

3.2.2.1 INCLINOMETER ............................................................................................................. 4

3.2.2.2 VIBRATING WIRE PIEZOMETER .................................................................................. 4

3.3 PERMITS .................................................................................................................................. 5

4.0 CONSTRUCTION RESOURCES ................................................................................................ 5

4.1 PERSONNEL ............................................................................................................................ 5

4.2 PLANT & EQUIPMENT ............................................................................................................. 5

4.3 SURVEY & SETTING OUT ....................................................................................................... 5

4.4 SITE ACCESS .......................................................................................................................... 5

5.0 INSPECTION & TESTING .......................................................................................................... 6

5.1 INCLINOMETER ......................................................................................................................... 6

5.2 VIBRATING WIRE PIEZOMETER .............................................................................................. 6

6.0 HAZARD IDENTIFICATION, RISK ASSESSMENT & CONTROL ............................................ 7

APPENDIX A: DRAWING FOR INSTALLATION DETAILS .............................................................. 8

APPENDIX B: JOB SAFETY AND ENVIRONMENTAL ANALYSIS ................................................. 9


1.0 PURPOSE & SCOPE

The purpose of this Construction Execution Procedure (CEP) is to identify typical standard

works procedure for drilling and installation of Inclinometer and Vibrating Wire Piezometer for

the Proposed Tunnel Link between MRT Station at Muzium Negara and St. Regis Hotel,

Kuala Lumpur, Malaysia. This procedure will ensure that those work to be carried out in

accordance to the standards, local regulations and codes.

The CEP covers the following scope of works:

• Drilling borehole

• Installation of instruments

2.0 REFERENCES

2.1 STATUTORY REQUIREMENTS/DRAWINGS

The drawing for installation details of instruments is attached on Appendix A.

3.0 CONSTRUCTION METHODOLOGY

3.1 SUMMARY

This method statement outlines the general working method for drilling borehole and

installation of Inclinometer and Vibrating Wire Piezometer. Those works to be mentioned in

the item 3.2 Work Method.

3.2 WORK METHOD

3.2.1 DRILLING BOREHOLE

One (1) unit of Rotary Wash Boring machine will be utilised to carry out the Soil Investigation

works. The scopes of works consist of four numbers of deep boreholes, estimated to a

maximum depth of 14m. The borehole positions shall be determined at the site by the client/

consultant engineer.

The diameter of the drilled borehole is 115mm and the borehole will be lined with casing

(HW/NW size) to prevent the collapse of the borehole wall. A piston pump powered by a

diesel engine will be used in circulating water into the borehole. The working area to be

barricaded.


3.2.2 INSTALLATION OF INSTRUMENTS

3.2.2.1 INCLINOMETER

The first section of casing is lowered into the borehole, with the cap on the lower end and the

coupling at the top end. A casing clamp is used to prevent the casing from falling into the

hole. The next section of casing is inserted into the top coupling, the grooves aligned and

secured to the bottom section of the casing with AV adhesive. The casing ends are butted

together for proper fit. More sections of casing are added as described until the casing reach

at the required level. Pour clean water into the inclinometer casing to ensure the casing sinks

to the bottom of the borehole since there is drilling mud or water in the borehole. The stick up

portion of the casing, if any, is then cut off at a suitable height with a hacksaw, and a

removable cap inserted to prevent foreign material entering casing.

Backfilling of the annular space between the borehole (or borehole casing) and the outside of

the inclinometer casing can be next carried out, using cement grout for a depth 1 m as

anchor, and then by using cement-bentonite grout (2:1) up to ground level.

3.2.2.2 VIBRATING WIRE PIEZOMETER

The VW Piezometer tip is immersed in cooled boiled water (de-aired water) for at least 24

hours to saturate the filter. It is then placed in a geotextile bag filled with clean sieved sand

(passing 1.18mm, retained on 600micrometer).

The use of the geotextile bag filled with sand is to prevent the clogging up of the filter of the

piezometer during installation, and also it provides a minimum thickness of clean sand

between the filter and the soil should the assembly for some reason cannot be placed in the

center of the borehole (this system in fact allows the piezometer to be placed more accurately

in the center of the borehole).

Ten to fifteen minutes after the piezometer has been lowered to the required depth, a reading

is taken using the VW Data Recorder to check whether the piezometer is functioning or not.

Clean sieve sand (passing 1.18mm) is poured into the borehole until a layer of sand about

0.5m thick is obtained at the bottom of the borehole. The piezometer is lowered into the

borehole and placed on that layer of sand. More sand is poured in until the piezometer is

covered by a layer of sand about 0.5m thick.

The bentonite plug is formed above this layer and this sand layer by slowly dropping bentonite

pellets. The thickness of this plug will be about 0.5m thick. The rest of the borehole is then

grouted to ground level with a pump-able cement-bentonite mix (4:1).

The thickness of the various layers is measured using a measuring tape weighted down with

a heavy weight, and lowered into the borehole periodically. Each borehole will have only one

piezometer and the piezometers will be marked at the end of the signal cable at ground level

with a tape bearing identification numbers.


3.3 PERMITS

Permit to work for piling to be apply before commence the work.

4.0 CONSTRUCTION RESOURCES

4.1 PERSONNEL

The Supervisor and Project Coordinator will oversee for the drilling and installation works and

any related activities.

The Supervisor shall ensure that the method statement is followed also responsible for the

safe performance and operation of the machineries and they are trained to perform the tasks.

Workers should be possess adequate skills to ensure the quality of works.

4.2 PLANT & EQUIPMENT

The following plants and equipment are required for the drilling and installation works:

• Diesel Engine Boring Plant

• Diesel Engine Piston Pump

• Triplex Pump

• Drilling accessories – HW Casing & AW Rod

• Tripod

• Chain Block

• Tool Box

• Inclinometer Casing

• PVC Pipe

4.3 SURVEY & SETTING OUT

The setting out of the instruments to be determined by the surveyor.

4.4 SITE ACCESS

The construction work site is located at the Lot 86 (Lot C), Jalan Damansara (opposite of

Muzium Negara), Kuala Lumpur, Malaysia.


4.5 TEMPORARY SERVICES

Red and white warning tape shall be placed and surround the drilling area (5m x 7m).

5.0 INSPECTION & TESTING

5.1 INCLINOMETER

The inclinometer torpedo is connected to the readout unit and is lowered to the bottom of the

borehole.

Biaxial readings are taken up to the hole at 0.5m increments until the top of the casing is

reached. This procedure is repeated by removing the inclinometer torpedo from the casing,

turning it 180 degrees and lowering it down to the bottom of the borehole.

The frequency of monitoring is daily manual monitoring (Monday to Saturday except Public

Holiday).

5.2 VIBRATING WIRE PIEZOMETER

To read the pressure, the signal cable of the piezometer is attached to the indicator box, and

the pressure or frequency read from the digital gauge.

The frequency of monitoring is daily manual monitoring (Monday to Saturday except Public

Holiday).


6.0 HAZARD IDENTIFICATION, RISK ASSESSMENT & CONTROL

Hazard identification, risk assessment and control are detailed in a specific Job Safety and

Environmental Analysis (JSEA) number 020-X010-2641 for the Drilling and Installation of the

Instruments. The JSEA is attached in Appendix B.

JSEA are provided as attachment to this CEP and these are regularly reviewed to ensure that

all hazards have been identified and adequate control measures are in place.

Applicable McConnell Dowell Safe Work Instruction (SWI) for this CEP is as follow:

SWI No. Description

020-K110-100 Mobile Plant Awareness

020-K132-100 Personal Protective Equipment

020-K004-100 Using Hand Tools

020-K132-100 Personal Protective Equipment

020-K105-100 Height

020-K108-100 Ladder Safety

Applicable McConnell Dowell Safe Environmental Protection Instruction (EPI) for this CEP is

as follow:

EPI No. Description

025-L001-100 Sediment and Erosion

025-L015-100 Management of Contaminated Material


APPENDIX A: DRAWING FOR INSTALLATION

DETAILS

Based on J001-600-100 Rev4 Page 9 of 6

APPENDIX B: JOB SAFETY AND

ENVIRONMENTAL ANALYSIS

] JOB SAFETY & ENVIRONMENTAL ANALYSIS (JSEA)

Document # F001-020-[SIN]

F001-020-[SIN] Rev1 (Based on F001-020-[AUS], Rev 1, 15 Dec 2010) Page 2 of 5

Powered Plant and Equipment required: (e.g. EWP / Crane / Forklift etc) Permit-to-work System Required

Diesel Engine Boring Plant Blasting Operation Y / N Piling Y / N

Diesel Engine Piston Pump Confined Space Entry Y / N Tunnelling Y / N

Triplex Pump Demolition Y / N Work at Height Y / N

Drilling accessories – HW Casing & AW Rod Excavation Y / N Drilling Y / N

Tripod, Chain Block, Tool Box & etc Hot Work Y / N Y / N

Lifting Y / N Y / N

Man Cage Y / N Y / N

Instructions available for information as required: (SWI’s, SOPs, EPI’s etc):

K115-Compressed Air K052-Stacking & Storage of Materials L001-Soil Erosion Sediment & Surface Run-0ff

K126-Concrete Pumping K131-Telehandler L002-Disturbance to Terrestrial Flora & Fauna

K123-Confined Space Entry K038-Thermal Stress-Heat L003-Disturbance to Aquatic Flora & Fauna

K101-Cranes & Lifting K053-Trenching & Excavations L004-Noise Emissions

K119-Driving Vehicles K121-Trenching L005-Atmospheric Emissions

K117-Electric Arc Welding Equipment K122-Underground Services L006-Vibration

K118-Electrical Equipment K032-Work Near Underground Services L007-Storage, Maint. & Refuelling Machinery

K113-Electrically Hand Tools K018-Using a Workbox L008-Storage & Handling of Hazardous Subs.

K134-Engerised Equipments K014-Using Electrical Equipment L009-Social Impact

K010-Erecting & Using Mobile Scaffolding K004-Using Hand tools L012-Infectious Plant, Disease & Weeds

K011-Erecting & Using Fixed Scaffolding K031-Work Near Plant L013-Solid and Liquid Waste

K044-Exposure to Noise K108-Ladder Safety L014-Disturbance to Cultural Heritage

K133-Forklift Operation L015-Land Contamination

K105-Height L016-Visual Amenity

K041-Housekeeping-Access & Egress L017-Energy & Water Consumption

K012-Lifting & Slinging L018-Acid Sulphate Soils

K130-Manual Handling L019-Management of Contaminated Ballast

K110-Mobile Plant Awareness L020-Abrasive Blasting

K111-Mobile Plant Operation L031-Vector Control – Mosquito

K015-Operating Cranes L032-Vector Control – Fly and Rodent

K116-Oxyacetylene L033-Infectious Disease

K132-Personal Protective Equipment L034-Pest Control Company

K112-Powered Small Plant L035-Control of Construction Waste

K107-Scaffolding Fixed Erecting & using L036-Control of Toxic Waste

K106-Scaffolding Mobile Erecting & using




Qualifications required for activities:

(insert specific licensing requirements e.g. Rigger / Crane driver / Scaffolder]

Training required for activities (other than Site Induction, SOC):

Risk Rating ® LOW [ 1-3 ]

Broadly acceptable – Manage by routine procedures

MODERATE [ 4-6 ]

Tolerable – With identified controls fully implemented

HIGH [ 8-12 ]

Undesirable – Additional controls required to reduce risk

VERY HIGH [ 15- 25 ]

Intolerable – Do not start activity

Risk Matrix – Design / Construction / Delivery / Operations / Maintenance:

Disciplines will review likelihood and consequences in line with their specific

parameters as noted

CONSEQUENCE

1 = Insignificant 2 = Minor 3 = Moderate 4 = Major 5 = Catastrophic

PEOPLE – No injuries requiring any treatment.

ENVIRONMENT – Minor localised environmental harm rectified within hours. No protected habitat or species affected

PEOPLE – First aid treatment.

ENVIRONMENT – Minor transient environmental harm that requires days for recovery. No protected habitat or species affected

PEOPLE – Medical treatment required, Restricted Work Case.

ENVIRONMENT – Significant environmental harm that requires weeks for recovery. Environmental incident involving protected species or habitat

PEOPLE – Injuries resulting in; lost time, permanent disability, amputation, or surgery.

ENVIRONMENT – Very serious long term environmental harm or contamination that takes years to recover. Damage to protected species or habitat as a result

PEOPLE – Single or multiple fatalities.

ENVIRONMENT – Severe environmental harm or contamination resulting in permanent environmental damage. Endangered species and habitat destroyed

LIKELIHOOD

5 =Almost certain Is expected to occur M-5 H -10 VH-15 VH-20 VH-25

4=Likely Will probably occur in most circumstances

M-4 H-8 H-12 VH-16 VH-20

3=Possible Should occur at some time L-3 M-6 H-9 H-12 VH-15

2=Unlikely Could occur at some time L-2 M-4 M-6 H-8 H-10

1=Rare May occur only in exceptional circumstances

L-1 L-2 L-3 M-4 M-5

Likelihood (L) 1 = Rare, 2 = Unlikely, 3 = Possible, 4 = Likely, 5 = Almost Certain Consequence ® 1 = Insignificant, 2 = Minor, 3 = Moderate, 4 = Major, 5 = Catastrophic

Risk Rating ® LOW [ 1-3 ] Broadly acceptable – Manage by routine procedures

MODERATE [ 4-6 ] Tolerable – With identified controls fully implemented

HIGH [ 8-12 ] Undesirable – Additional controls required to reduce risk

VERY HIGH [ 15- 25 ] Intolerable – Do not start activity




Activity

(Basic job steps)

Potential Hazards / Consequences

(What can go wrong)

Initial Risk

[L x C=R]

Control Measures

Residual

Risk

[L x C=R]

Hierarchy of Controls applied

Persons Responsible

L C R L C R

Elimination

Substitution

Isolation

Engineering

Administration

PPE

Mobilisation &

shifting of

equipment &

materials

• Collision or toppling /

damage to property or

bodily injuries

3 3 H9

• Banksman equipped with whistle to guide vehicles movement more effectively.

• Visual inspection on the first day of mobilisation. Any repair to be done (if

required) to be rectified immediately.

• Supervisor to keep a safe distance away from vehicles.

• Supervisor to ensure that driver slow down around bends.

• Only authorised operator can operator the drilling machine

• To follow K110 – Mobile Plant Awareness.

2 2 M4 × ×

-Supervisor/

Safety

Personnel

Borehole

drilling

• Misuse and improper

maintenance / injury or

property damage.

• Handling of casing /

minor injury or property

damage.

• Pinch point / hand injury

or minor injury

• Fall / property damage or

bodily injuries

3 4 H12

• To apply Permit to Work (PTW) accordingly.

• Improper materials to be dispose / remove from site.

• Worker to be trained the proper drilling method.

• To good practice during manual handling of machine materials.

• All work personnel put on their necessary PPE at site.

• To barricade the working area and display warning signage.

• To create small pit to control the flow of bentonite.

• To cover all rotating part.

• To follow SWI K004 – Using Hand Tools

• To follow SWI K105 – Height

• To follow SWI K108 – Ladder Safety

• To follow SWI K132 – Personal Protection Equipment.

• To follow SWI K130 – Manual Handling.

• To follow EPI – Soil Erosion Sediment & Surface Run-Off

• To follow EPI – Land Contamination

3 2 M6 × ×

Supervisor /

Safety

Personnel

Installation

PVC casing

• Slippery or falling / bodily

injuries

• Spark / bodily injury or

property damage 3 4 H12

• Worker to be train the proper installation.

• To ensure the guard is functioning.

• Supervisor to ensure the workers follow the method statement.

• Flammable substances to be keep away from iron / steel tools.

• To follow SWI K130 – Manual Handling.

2 2 M4 × ×

Supervisor /

Safety

Personnel




Sign On: I confirm that the JSEA has been explained and its contents are clearly understood and accepted. I also confirm that my required qualifications to

undertake this activity are current. I clearly understand the controls in this JSEA must be applied as documented; otherwise work is to cease immediately.

Name Qualification Signature Date Employer

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