Draft Handbook (DOE) 16.6.2022 (UPDATE)

• Good and bad practices to be included after all BMP

IMPLEMENTATION OF BEST MANAGEMENT PLAN (

Bill No. BMPs Do

1 Silt Fence

116

(BMPS) DO AND DON’T

Don’t

2 Erosion Control
Blanket (ECB)

117



118



3 Silt Trap
119



120



4 ST Maintenance
121



122



5 ATS (Anionic
Polymer)

123



6 Scheduled
Waste

124



7 Open Burning
125



9 Culvert and
Crossings

10 Stockpile

126



127



Slope Stabilization & Protection – put under item erosion

Purpose Impact Controlled
To control soil erosion on hill slopes and reduce slope
surface water run-off/effluent velocity especially during rain. Slope failure, water pollution
and tower collapse, access road
If the water run-off/effluent velocity on the slope surface is failure and landslide
high, erosion will occur and can cause the slope to collapse.

In addition, it can also result in mud deposits being brought
into the river which can cause pollution to water quality.

Determination of slope protection design, type and
application could be referred to Appendix 3

Method Statement for slope cutting spec: -refer Geotex unit

Close Turfing (Erosion)

Application of Close • There are two methods of close turfing which are natural grass and
Turfing hydroseed with Erosion Control Blanket (ECB)

1) • Normally natural grass has been used for flat area surface while
hydroseeding with ECB has been implemented in hilly area

• Stabilizing and maintaining ground structure and minimize soil erosion

Figure 4. 4: Erosion Control Figure 4. 5:: Natural Grass
Blanket

128

Mitigation Figure 4. 6: Hydroseed with ECB
Measures (Left) & Natural Grass (Right)
&
Monitoring Ensure all the grass is fully grown and function as a slope protection. Additional drainage
shall be constructed to discharge surface water away from the site quickly.

During monitoring if there are series of slope failures still occur upon reimplementation of
the same methods, permanent slope protection shall take place [eg. soil nailing, guniting
and etc.]

Soil Nailing & Guniting (Erosion : Permanent)

1) Definition
2) Purpose
3) General/typical specification, BMPs drawing
4) Application (as per application below)
5) Good & Bad Practices

Application of Soil • Suitable for undulating slope or curves due to slope failure
Nailing & Guniting
• Prevent water infiltration and seepage
• For soil nailing, drill 12 m length of nail into ground, grouting of grade 30.

• Spray concrete of grade 30 with thickness of 100mm with double layer of
reinforcement A6

129

Figure 4. 8: Guniting Figure 4. 7: Guniting

Mitigation Figure 4. 9: Soil Nailing with Guniting
Measures &
Monitoring Regular physical monitoring

Hydroseeding with Steel Grid Netting (Erosion : Permanent)

Application Steel Grid • Reduce velocity or surface runoff
Netting with
Hydroseeding • Steel grid netting will protect the seedings and roots of young
vetiver grasses from being washed away by surface runoff or burnt
by hot sun

• Permeable slope surface that will reduce pore water pressure
develop behind the slope Environmentally friendly (aesthetic value)

130

Figure 4. 10: Steel Grid Netting Figure 4. 11: Steel Grid Netting

Figure 4. 13: Steel Grid Netting with Figure 4. 12: Grid Netting
Hydroseeding

Mitigation Regular site monitoring on the growth of the hydroseeding grass. Repeat the
Measures & hydroseeding process if the growth of the hydroseeding is not as per desired outcome.
Monitoring

131

Mechanical Stabilize Earth (MSE) Wall & Retaining Wall System (i.e
R.C Wall, Keystone) (Erosion : Permanent)

Application of • To reinforce the earth/soil using high tensile geogrid by providing
Mechanical lateral support to the embankment

Stabilize Earth • MSE Wall is flexible and susceptible to elastic deformation
(MSE) Wall • Suitable for new fill/ embankment slope design
• To decreasing water velocity and protecting slopes from erosion
• Permeability to water (Good drainage)

Mitigation Figure 4. 14: Mechanical Stabilize
Measures & Earth (MSE) Wall
Monitoring
MSE wall shall be located at stable ground

132

Drainage (Run-Off) Impact Controlled
Soil erosion
Purpose
Drainage is intended to discharge the surface water fast to the
proper channel without causing soil erosion and water seepage
into under the ground

Cascaded Drain

Application of Cascade • The functions of cascade drain are to control and channel surface
Drain runoff water from upstream to downstream at the slope.

Figure 4. 156: Cascaded Figure 4.17: Berm drain
Drain

Figure 4. 16: Stream crossing using culvert

Mitigation Install series of check dam to reduce velocity and peaks flows
Measures
& The size and capacity of the drains must be sufficient to cater at least a storm of 10 year
Monitoring ARI event

Cascade and berm drain need to be maintained periodically.

133

Check dam & Earthdrain

*to use natural resources (mulching/biomass protection) inside rentice
e.g. by using branch of tree for wood stack silt fence, check dam
(application check dam & silt fence)

Application of Check • Check dam normally small, sometimes temporary and constructed
Dam & Earthdrain across drainage, or waterway to counteract erosion by reducing
water flow velocity

• Check dams are typically, though not always, implemented in a
system of several dams situated at regular intervals across the area of
interest

• Earth drain is used to divert runoff or channel runoff to silt trap,
thereby reducing the potential for erosion and off-site sedimentation.

• Small dams built across drains / drains to reduce surface water flow
velocity especially when it rains.

• Low water flow velocity will reduce soil erosion and allow sediment to
settle at the bottom of drains / drains.

• It can be built from stone / gabion or sandbags

Figure 4. 19: Earthdrain with check dam and
covered with geotextile to reduce gullie

Figure 4. 17 Checkdam in Figure 4. 18: Constructions of
earthdrain. checkdam

134

Mitigation Check dam and earthdrain need to be maintained periodically by inspection on the
Measures following items:
&
Monitoring 1. Check dam and earthdrain in place n functioning to prevent muddy water from being
discharged into nearby waterways/drain or encroach public road

2. Regular desilting of the check dam and earth drain

3. Inspection all the erosion control device clean and functioning properly

Silt Trap

Application of Silt Trap • This method works by allowing water to accumulate in the trap for
some time and causing the suspended sediment to settle to the
bottom of the trap so that it is isolated from the water.

• The water that passes through the mud trap will be filtered and the
water that comes out through it has a low mud / silt content

Figure 4. 20: Silt Trap Figure 4. 21: Silt Trap

Mitigation Silt trap to be maintained periodically by inspection by following items:
Measures
& 1. Ensure silt trap adequately size to cater the surface run off during rains
Monitoring
2. Silt traps in place n functioning to prevent muddy water from being discharged
into nearby waterways/drain or encroach public road

3. Regular desilting of the silt trap

135

Sediment Pond

Application of • Sedimentation pond is a constructed pool, used to slow down water
Sediment Pond flow in a ditch.

• The purpose is to get suspended solids and particle bond nutrients to
settle from the water.

• It can be established by damming a natural depression or by
excavating.

• Sedimentation ponds works as silt trap at bigger site area

Figure 4. 22: Sediment Pond Figure 4. 23 Sediment Pond

136

Figure 4. 24: On Site Sedimentation Pond (OSD)

Mitigation Sedimentation pond must be maintained periodically by inspection by following items:
Measures &
Monitoring

137

Stream crossings Impact Controlled
Water pollution
Purpose

Construction of temporary crossings using bridges or culverts to
cross rivers/waterways

Gabion and culvert bridge

Application of Gabion • Gabions are flexible double-layer wire mesh systems.
and Culvert Bridge
• It stop the movement of soil from erosion caused by heavy rains

• Gabion walls control land sliding on road sides, erosion and scouring
on the rivers banks during flood and high velocity river streams and
prevent the water logged areas from further damaging.

• A culvert is a tunnel that carries a stream beneath a street.

• It is typically found in a natural flow of water and serves the purpose
of a bridge or a current flow controller.

Mitigation (a) (b)
Measures &
Monitoring Figure 4. 25: (a) & (b) : shows the Gabion and
Culvert for stream crossings purpose.

Gabion and culvert bridge must be maintained periodically by by inspection by following
items:
1. Gabions shall be inspect on regular basis or after heavy rain
2. No blockage inside the culvert
2. Sufficient culvert size to cater the channeled water flow

138

Temporary Road Works Impact Controlled
Soil erosion, water pollution
Purpose

The road is stabilized with crusher run to reduce soil erosion
during rain.

Geotextiles & Crusher Run

Application of • Geotextile fabrics, when used in association with soil, have the ability to
Geotextiles & Crusher separate, filter, reinforce and protect the road surface from soil erosion

Run • Geotextile is a permeable fabric typically made from polypropylene
or polyester.

• Crusher run (gravel) is a loose aggregation of rock fragments use to
stabilize road surface to reduce soil erosion during rain.

Figure 4. 27: Geotextile Figure 4. 26: Crusher Run

Mitigation Geotextiles and crusher run is maintained periodically by inspection by following items:
Measures &
Monitoring 1. Geotextile in good condition and in place

2. Maintain Chrusher run (gravel) thickness as per LD-P2M2 approved drawings in order to
protect the earth surface from precipitation and dry weather.

139

ii) Spillage Control & Monitoring

Spillage Control

Purpose Impact Controlled

To ensure that oil spillage is control by the usage of designated Soil pollution, water pollution &
container such as spill tray, bund wall & oil trap from polluting the illegal dump of waste.
environment.

Spill tray & Bund Wall

Application of Spill Tray • A spill tray is placed under the machine that prevent oil from leaking.
& Bund Wall
• Bund wall is enclosed around the portable genset & transformers to
prevent any oil spillage on the ground.

(a) (b) (c)

Figure 4. 28 shows the spill tray located under the (a)machine,
(b)portable genset & (c)barrel.

Mitigation (a) (b)
Measures &
Monitoring Figure 4. 29: shows bund wall enclosed around the
(a)transformers & (b)portable genset .

Spill Tray & Bund Wall is maintained periodially.

Scheduled waste shall be properly disposed according to waste management practices.

140

Oil Trap/ Oil Pit

Application of Oil • Designated oil trap/pit under grid size transformer to collect any oil
Trap/Oil Pit spillage from polluting the environment

• Construction of bund wall at the grid size transformer compound to
avoid oil spillage into the surrounding area

(a) (b)

Figure 4. 30( a) & (b) shows oil trap around
the transformers.

Mitigation Regularly check the flow of the oil trap.
Measures & Scheduled waste shall be properly disposed according to waste management practices.
Monitoring

141

iii) Environment Control & Monitoring Impact Controlled

Waste Management Soil pollution, water pollution and
illegal dump of waste.
Purpose

To ensure that construction schedule waste is being monitored,
recorded, segregated & kept in designated container, labeled
based on its category, or recycled whenever required

Scheduled Waste Store

Application of • Scheduled waste store (small cabin) with good air ventilation.
Scheduled Waste Store • Designated container to segregate construction waste.

Figure 4. 31: Waste Store (small Figure 4. 32: Waste container
cabin) inside waste stores.

Mitigation Proper waste management control.
Measures & Scheduled waste shall be properly disposed according to waste management practices.
Monitoring

Recycle Bin • Container used to hold recyclables before they are taken to recycling
centers according to its material i.e: glass, paper & plastic
Application of Recylce
Bin

142

Mitigation Figure 4. 33: Recycle Bin
Measures &
Monitoring Proper waste management control.
Rexycled waste shall be properly disposed according to waste management practices.

Dust Control Impact Controlled
Air Pollution
Purpose

To manage on-site dust control by eliminating and restrict dust
particles from becoming airborne

Water Bowser

Application of Water • Water Bowser is used for dust control.
bowser
• Dust control by sprinkling the water using water bowser onto soil
surface earth on frequent basis

Mitigation Figure 4. 34: Water Bowser
Measures & Do the water bowsing periodically.
Monitoring Make sure the sight view in site is obvious and clear from dust.

Site Entrance – Wash Trough

h Trough
143

Application of Wash • Any machineries leaving the construction site are required to undergo
Trough - Site Entrance washing at the wash trough.

• The washing includes through washing from mud or soil.

• This is to keep the public road clean from the dirt from the
construction site.

(a) (b)
Figure 4. 35trsohuogwhs a(at)s&ite(b. ) shows wash trough

at site.

Figure 4. 36: Construction of wash trough.

Mitigation Maintain the wash trough periodically by inspection by following items:
Measures & 1. Regular desilting the wash trough
Monitoring 2. Overflows of the wash trough should be directed to a suitable sediment trap

144

Noise Control

Purpose Impact Controlled
Noise Pollution
To ensure noise is controlled not more than 55 dB(A) (7am-10am)
during daytime and 45dB(A) (10pm-7am) during nighttime in the
boundary of project site during earthworks, construction, and
operation.

Noise Control

Application of Noise • To measure and manage noise from constrcution works.
Measurement Kit

(a) (b)

(c)

Mitigation Figure 4. 37 (a), (b) & (c) shows the noise measurement kit.
Measures & Regulation with noise level limits for the noise sources shall be controlled.
Monitoring

Water Quality K.I.V

145

Purpose Impact Controlled
Water quality, Soil erosion
To ensure there is minimum impact to the existing water quality
of the nearby water sources due to the construction activities
carried out.

Water Quality

(a) (b)

(c)

Figure 4. 4 (a), (b) & (c) shows water sampling for water quality

Mitigation
Measures &
Monitoring

146

5

Summary

All mitigation measures identified shall be “Kita tidak mewarisi
bumi ini dari moyang kita,
implemented at site to minimize the
kita meminjam bumi ini
environmental impact during daripada anak-cucu kita”

construction/ operation activities, as per

stipulated in the Environmental Quality

Act 1974. We are committed to

continuously monitor and safeguard the

environment.

147

6

References

• Barrow CJ (2005) Environmental Management and Development. Routledge,
London

• Conditional of Approval, TNB Environmental Impact Assessment Report
• David Ross Brower (1995), Environmentalist, California
• Environmental Quality Act 1974
• Environmental Quality (Prescribed Activities) (Environmental Impact

Assessment) Order 2015
• Environmental Mainstreaming Directive. 2017. DOE Malaysia.
• ISO 14001:2015 Standard
• Stoddart, H. (2011). A Pocket guide to sustainable development governance.

Stakeholder Forum.
• TNB Grid General Procedure, Aspect Impact Register (AIR) (GRID-MGMT-612-01)
• TNB Grid Management System Manual (GRID-GMSM-2019)
• TNB Sustainability Report 2019

148

7 ENVIRONMENT ASPECT & IMPACT IDENTIFICATION ENVIRONMENT IMPACT EVALUATION DECISION CONTROL MEASURE

AppendixOperation / CONSEQUENCES (TABLE 2) NA HSE Requirement for Contractor
Condition (Normal, NA HSE Requirement for Contractor
Appendix 1a/Figure 2.2 – Sample of Aspect Inspect Register (AIR) for OHL Project NA HSE Requirement for Contractor
Abnormal, NA HSE Requirement for Contractor
149 Situation NA HSE Requirement for Contractor
NA HSE Requirement for Contractor
(Past,Current,Future
)

LEGAL APLICABILITY
/ MANAGEMENT
LEGAL /
MANAGEMENT
INSTRUCTION

Severity
Longevit

y&
Reversib
Damage

cost
Sensitivi

ty
RESULT
PROBABILITY (TABLE

3)
SCALE OF ASPECT

(TABLE 4)
DECISION ON
SIGNIFICANT
IMPACT (Y/N)
DECISION ON
SIGNIFICANT
ASPECT (Y/N)
Sub Activity Impact

Rating
Risk

OPPORTUNITY
Procedures/ WI/ OTP/

ERP Manual etc
ASPECT IMPACT

NO Sub Activity Unit

(Interaction with (any adverse or
Environment) beneficial change to

environment)

Pembuangan alat Isu alam sekitar,
A Buangan terbiar C setempat dan Y EQA Sec 24
1 ganti/ aksesori/ drum OHL YYH 
(contoh : palang komuniti

kayu, pengalir

Tanah runtuh,

OHL N hakisan tanah, C Pencemaran tanah Y EQA Sec 24, 25 YYH 
penurunan kualiti air dan air

sungai

2 Pemotongan bukit
dan cerun

hakisan tanah,

OHL A penurunan kualiti air C Pencemaran udara Y EQA Sec 22, 25 YYH 
sungai, pupus flora dan air

fauna

Kebakaran hutan/ LINE E Kebakaran berlaku di F Pencemaran udara Y EQA Sec 22 YYH 
3 semak samun dalam luar kawalan

kawasan rentis

Penebangan pokok di OHL N Penggunaan sumber C Pengurangan sumber N N/A MMMH HMH Y Y M 
semulajadi semulajadi 

4 dalam dan di luar
rentis

OHL A Pengumpulan kayu Kerosakan Surat Akuan Janji Y YM
menjadi 'cheak dam' - C flora fauna N bersama Pejabat
banjir lumpur
Hutan Daerah

Appendix 1b – Sample of Aspect Inspect Register (AIR) for SUB & UGC Project
150
Operation /
Condition
(Normal,
Situation
(Past,Current,Fu

ture)
LEGAL
APLICABILITY /
LEGAL /
MANAGEMENT
INSTRUCTION
Seve
rity
Long
evit
Dya&m
age
Sceosnts
itivit
y
RES
ULT
PROBABILITY
(TABLE 3)
SCALE OF
ASPECT
DE(CTIASIBOLEN4)ON
SIGNIFICANT
IMPACT (Y/N)
DECISION ON
SIGNIFICANT
ASPECT (Y/N)
Sub Activity
Impact Rating

Risk
OPPORTUNITY
Procedures/ WI/
OTP/ ERP Manual

etc
ASPECT IMPACT CONSEQUENCES (TABLE 2)

NO Sub Activity Unit (Interaction with (any adverse or
Environment) beneficial change to

Pembuangan alat SUB A Buangan terbiar C Pencemaran tanah Y EQA Sec 24 YYH  NA HSE Requirement for Contractor
ganti/ aksesori/ drum YYH  NA HSE Requirement for Contractor
1 (contoh : palang
kayu, pengalir, kayu  NA HSE Requirement for Contractor
formwork)  NA HSE Requirement for Contractor
 NA HSE Requirement for Contractor
Pembuangan SUB A Lelehan C Pencemaran tanah Y EQA Sec 24 / 22  NA HSE Requirement for Contractor
2 daripada tangki dan udara  NA HSE Requirement for Contractor
 NA HSE Requirement for Contractor
septik  NA HSE Requirement for Contractor
 NA HSE Requirement for Contractor
Tanah runtuh,

SUB N hakisan tanah, C Pencemaran tanah Y EQA Sec 24, 25 YYH
penurunan kualiti air dan air YYH

3 Pemotongan bukit sungai
dan cerun

SUB A Pupus flora fauna C Isu alam sekitar Y EQA Sec 24

Kebakaran hutan/ SUB E Kebakaran berlaku di F Pencemaran udara Y EQA Sec 22 YYH
4 semak samun dalam luar kawalan

kawasan rentis

Penebangan pokok SUB N Penggunaan sumber C Pengurangan sumber N N/A MMMH H MH Y Y M
SUB semulajadi semulajadi

5 untuk pembersihan
tapak

A Pengumpulan kayu C Kerosakan N Arahan Jabatan Y YM
menjadi 'cheak dam' - flora fauna Hutan Y YM
banjir lumpur

SUB N Pengeluaran habuk / C Pencemaran udara Y Arahan Majlis
SUB debu Tempatan

6 Pengangkutan tanah
keluar masuk tapak

N Air basuhan C Pencemaran air EQ (Industrial Y YM
kenderaan Y Effluents) reg Y YM

2009

7 Pengaliran air hujan SUB Pengaliran air hujan Pencemaran air EQ (Industrial
dari tapak pembinaan yang tercemar ke Y Effluents) reg

A parit/longkang dan C 2009
seterusnya ke

perparitan awam

Appendix 2a – Project Environmental Management Guideline (GRID-GD-INTG-01) – Rev. 1
Published on 25 Jun 2020

The purpose of this document is to describe the guideline for overall Environmental
Management practices in Grid’s Project and to comply with the EQA 1974.

The procedure are as follows:

1. During planning stage, for new projects identified under ATDP and Target Network, Land
Planning GS shall conduct/carry out a Land Identification studies report, including ESA rank,
based on the latest RTD. The best route with least impact to the environment, using Cost Benefit
Analysis (CBA), is proposed.

2 For new substation projects identified under STCP, GD PMO/GD Design shall conduct
FS that includes requirement of EIA prior to project approval.

3 During planning stage, GS shall determine the environmental component requirement and
obtain ESC project approval including cost of EIA/EMP based on identified OHL route and PMU
sites using standard template EIA/EMP cost from GD.

4 If the identified project requires EIA, LM shall proceed with the preparation and approval
of EIA as per work instruction – Arahan Kerja untuk Kelulusan EIA/EMP, LM-WI-01-P04. Design
Team shall review the EIA prepared by consultant before submission to DOE.

5 After approval of EIA, LM is to proceed with the preparation and approval of EMP as per
work instruction – Arahan Kerja untuk Kelulusan EIA/EMP, LM-WI-01-P04. Design Team shall
review the EMP prepared by consultant before submission to DOE.

6 After approval of EIA and EMP from DOE State, LM to forward it to PMO and Design for
BMPs BQ preparation and EIA/EMP/BMP shall be included in the tender document. The
consultant shall present the approved EIA/EMP/BMP to PMO before tendering to ensure it
benefits both TNB & DOE and for smooth implementation of project.

7 If the identified project does not require EIA, an internal environmental screening will be
conducted by Design to determine required BMPs based on checklist EMS-INTG-01-C01.

151

a. If BMPs is required: The environmental screening assessment result will be included in the
tender document. All required BMP based on the checklist EMS-INTG-01-C01.will be listed in
the BQ.

b. If BMPs is not required: project shall be tendered according to the minimal environmental
requirement as stated in EQA Act 1974.

8 During construction work, PE/SS is required to conduct the environmental inspection in
weekly basis as per checklist EMS-INTG-01-C02 to all on-going project.

9 EO/PE/SS need to ensure all EMP/BMP at sites are well maintained and in good condition
at all time. EO/PE to ensure that all EMP/BMP monitoring need to be reported and recorded
during construction period using platform LDP2M2 developed by DOE minimum by monthly or
after drastic changes occurrence at site such as heavy rain, storm or flood.

10 Project with EIA shall be audited at least on quarterly basis by 3rd party audit appointed
by DOE.

11 HSE team will conduct SAFCA and inspection on a regular basis to verify the compliance
on the environmental management system requirements. Management by Walkabout (MBWA)
will be conducted by the GD Management from time to time to ensure the compliance of
environmental requirements at project site.

12 After successful commissioning, all relevant documents related to environmental
management shall be listed in the Project Handing Over checklist (PMO-IIP-WI-01-CO6) to Grid
Maintenance.

13 All records on environmental management after commissioning shall be retained for 7
years.

14 The procedure is illustrated in the following diagram

152

Carta Aliran 1: Pengurusan Alam Sekitar dalam Pengurusan Projek Pembangunan Grid
153