Service CONTRACT NO: EDO/01/2017
ENVIRONMENTAL TEAM for
DEVELOPMENT OF
ANDERSON ROAD QUARRY SITE -
ROAD IMPROVEMENT WORKS
Under Environmental Permit no. EP-513/2016
Monthly Environmental Monitoring & Audit Report
SEPTEMBER 2019
|
CLIENTS: |
|
Civil Engineering and
Development Department |
Lam Environmental Services Limited 11/F Centre Point 181-185
Gloucester Road, Wanchai, H.K. Telephone:
(852) 2882-3939 Facsimile:
(852) 2882-3331 E-mail:
info@lamenviro.com Website:
http://www.lamenviro.com |
|
|
|
|
|
Certified
by: |
|
Sam Lam Environmental
Team Leader |
|
DATE: |
|
16 October 2019 |
|
|
1.1.......... Scope of the Report
1.2.......... Structure of the Report
2.2.......... Scope of the Project and Site
Description
2.3.......... Project Organization and Contact
Personnel
2.4.......... Construction Activities
3 Status of Regulatory Compliance
3.1.......... Status of Environmental Licensing and
Permitting under the Project
3.2.......... Status of Submission under the
EP-513/2016
4.1.......... Noise Monitoring
4.3.......... Water Quality Monitoring
5.1.......... Noise Monitoring Results
5.2.......... Air Monitoring Results
5.3.......... Water Quality Monitoring Results
5.4.......... Waste Management
6.1.......... Noise
Monitoring
6.2.......... Air Quality Monitoring
6.3.......... Water Quality Monitoring
6.4.......... Review
of the Reasons for and the Implications of Non-compliance
6.5.......... Summary of action taken in the event of
and follow-up on non-compliance
8. Complaints,
Notification of Summons and Prosecution
lIST OF TABLES
Table 2.1 Schedule 2 Designated Projects under this
Project
Table 2.2 Contact Details of Key Personnel
Table 3.2 Summary of submission status under
EP-513/2016
Table 4.1 Noise Monitoring Station
Table 4.2 Noise Monitoring Equipment
Table 4.3 Action and Limit Level for Noise Monitoring
Table 4.4 Air Monitoring Station
Table 4.5 Air Quality Monitoring Equipment
Table 4.6 Action and Limit Level for Air Quality
Monitoring
Table 4.7 Marine Water Quality Stations for Water
Quality Monitoring
Table 4.8 Water Quality Monitoring Equipment
Table 4.9 Action and Limit Level for Water Quality
Monitoring
Table 5.1 Summary of Quantities of Inert C&D
Materials
Table 5.2 Summary of Quantities of C&D Wastes
Table 7.1 Summary of Environmental Inspections
Table 7.2 Summary of Lanscape Inspections
Table 8.1 Cumulative Statistics on Complaints
Table 8.2 Cumulative Statistics on Successful
Prosecutions
Table 9.1 Construction Activities and Recommended
Mitigation Measures in Coming Reporting 2 Months
lIST OF FIGUREs
Figure 2.2 Project Organization Chart
Figure 4.1 Locations
of Noise Monitoring Station (for Road Improvement Work 1 & 2)
Figure 4.2 Locations
of Noise Monitoring Station (for Road Improvement Work 3)
Figure 4.3 Locations
of Air Quality Monitoring Station (for Road Improvement Work 1 & 2)
Figure 4.4 Locations
of Air Quality Monitoring Station (for Road Improvement Work 3)
Figure 4.5 Locations
of Water Quality Monitoring Station (for Road Improvement Work 1 & 2)
Figure 4.6 Locations
of Water Quality Monitoring Station (for Road Improvement Work 3)
lIST OF APPENDIces
Appendix 3.1 Environmental Mitigation Implementation Schedule
Appendix 4.1 Action and Limit Level
Appendix 4.2 Copies of Calibration Certificates
Appendix 4.3 Wind data extracted from HKO Automatic
Weather Station
Appendix 5.1 Monitoring Schedule for Reporting Month
Appendix 5.2 Noise Monitoring Results and Graphical
Presentations
Appendix 5.3 Air Quality Monitoring Results and Graphical
Presentations
Appendix 5.4 Water Quality Monitoring Results and
Graphical Presentations
Appendix 5.5 Monthly Summary Waste Flow Table
Appendix 6.1 Event and Action Plans
Appendix 6.2 Summary for Notification of Exceedance
Appendix 9.1 Construction Programme of Individual Contracts
EXECUTIVE SUMMARY
i.
This
is the Environmental Monitoring and Audit (EM&A) Monthly Report
– September
2019 of Development
of Anderson Road Quarry Site – Road Improvement Works under Environmental
Permit no. EP-513/2016 (Hereafter as “the Project”). The construction works of
the Project was commenced on 2 November 2018 and the tentative completion date
is end of 2023. This is the 11th
EM&A report presenting the environmental monitoring findings and
information recorded during the period of 1 September 2019 to 30 September 2019. The cut-off date of reporting is at the end of each
reporting month.
ii.
In
the reporting month, the principal work activities conducted are as follow:
Works in Road Improvement Works 1 (RIW1)
·
Preparation works for ELS at RWC2 Type 1 and 1a area are in progress;
·
No fine concrete construction at RWC2 area is in progress;
·
Sheetpile installation at KS27 is in progress;
·
Sheetpile installation at FE1 is in progress;
·
Construction of Slip Road 2 drainage works is in progress;
·
Construction of piezometer at RWC2 completed; and
·
Drilling holes for NDT for determination existing bored piles at Lee On
Flyover is in progress.
Works in Road Improvement Works 2 (RIW2)
·
Soil nail installation at Zone 3 and 4 are in
progress; and
·
Site clearance for Portion 5 is in progress
Works in Road Improvement Works 3 (RIW3)
·
Form haul-road & pre-drilling at slope D1 is in-progress;
·
Excavate
trial-pit at Slope D2 are in-progress;
·
Rock excavation works using drill and split method at Slope D3 along Lin
Tak Road are in-progress;
·
Installation of chain link fence and vehicular gates at EPD access road
at Slope D3 is underway
Air Quality
Monitoring
iii.
1-hour Total Suspended Particulates (TSP) monitoring was conducted at
eight monitoring stations. The sampling frequency is 3 times in every 6 days in
the reporting month.
iv.
No action or limit level exceedance was recorded in the reporting
period.
v.
One action level exceedance was recorded at Station LTR_AMS-3 (Po Tat
Estate) on 24 August 2019 in the reporting period. Repeat measurement was
conducted on 26 August 2019, and no exceedance was recorded. After investigation,
the exceedance was mainly by the overall poor air quality of the environment
and not project related.
Noise Monitoring
vi.
Noise monitoring was conducted at five noise
monitoring stations once per week in the reporting month.
vii.
No action or limit level exceedance was recorded in the reporting
period.
Water Quality Monitoring
ix.
No water can be collected at Station AC1 on 2, 6, 9, 11, 13, 16, 18, 20,
23, 25, 27 and 30 September 2019 as the station was dried out during the
monitoring scheduled in the reporting month.
x.
No water can be collected at Station E on 18, 20, 23, 25, 27 and 30
September 2019 as the station was dried out during the monitoring scheduled in
the reporting month.
xi.
One (1) suspended solid limit level exceedance was recorded at Station F
on 9 September 2019.
One (1) suspended solid action level
exceedance was recorded at Station F on 6 September 2019.
One (1) suspended solid limit level
exceedance was recorded at Station I on 13 September 2019.
Investigation of the other exceedances
were still in progress and would be reported in the coming report.
For the exceedances in August, after
investigation, the exceedances at Station F on 1, 3, 9, 23, 26, 28 and 30
August 2019 and the exceedances at Station I on 3 and 16 August 2019 were not
related to project activities. Discharge of silty water into the drainage
possibly connecting to station F was observed on 19 October 2019, hence, the
exceedance was project related.
Site Inspections and Audit
xii.
The Environmental Team (ET) conducted weekly site inspections
for the Contract on 6, 13, 19 and 27 September 2019. IEC attended the joint site inspection on 6 September 2019. No non-compliance was found during
the site inspection while reminders on environmental measures were recommended.
Complaints, Notifications of Summons and Successful
Prosecutions
xiii.
No environmental complaint was received in the reporting period.
Reporting Changes
xiv.
There are no particular reporting changes.
Future Key Issues
xv.
In
coming reporting 2 months, the scheduled construction activities and the
recommended mitigation measures are listed as follows:
Recommended Mitigation Measures |
|
·
Site formation and temporary soil nail
installation at RWC2 Type 1 & 1a (RIW1); ·
Site formation and temporary soil nail
installation for RIW2 Type 6,7 & 8 (RIW1); ·
Piling Platform 1 & 2 construction at
RWC2 Type 4-6 area (RIW1); ·
No-fines concrete construction at RWC2 area (RIW1); ·
Construction of drainage works at Slip Road 2 (RIW1); ·
ELS construction at KS27 (RIW1); ·
ELS construction at FE1 (RIW1); ·
Soil nail installation at Slope C1 at Zone 4 and 5 (RIW2); ·
Site clearance and slope profile formation at Slope C1 at Zone 5 &
6 (RIW2); ·
Removal of Lamp posts and erect temporary
lamp posts (RIW2); ·
Piling Platform erection and Sheetpile
installation for Portion 5 (RIW2); ·
Stage 1 rock excavation at Slope D3 (RIW3); ·
Retaining wall construction at Slope D3 (RIW3); ·
Shotcreting works at Slope D1 (RIW3); ·
Pre-drilling works at Slope D1 (RIW3); ·
Mass concrete wall construction at Slope D2 (RIW3). |
·
Dust control during dust generating works; ·
Implementation of proper noise pollution control; and ·
Provision of protection to ensure no runoff out of site area or direct
discharge into public drainage system. |
1.1.1.
Lam Environmental Services Limited (LES) has been appointed to work as
the Environmental Team (ET) under Environmental Permit (EP) no. EP-513/2016 to
implement the Environmental Monitoring and Audit (EM&A) programme as
stipulated in the EM&A Manual of the approved Environmental Impact
Assessment (EIA) Report for Development of Anderson Road Quarry site - Road Improvement
Works (Register No.: AEIAR-195/2016).
1.1.2.
In accordance with Clause 3.4 stated in EP-513/2016, four hard copy and
one electronic copy of the monthly EM&A Report shall be submitted to the
Director within 2 weeks after the end of each reporting month throughout the
entire construction period.
1.1.3.
In accordance with Section 11.3.1 of the Project EM&A Manual, the
first Monthly EM&A Report should be prepared and submitted to EPD within a
month after the major construction works commences with the subsequently Monthly
EM&A Reports due in 10 works day of the end of each reporting month.
Section 1 Introduction – details the scope and structure of the report.
Section 2 Project
Background – summarizes background and
scope of the project, site description, project organization and contact
details of key personnel during the reporting period.
Section 3 Status of Regulatory Compliance – summarizes the status of valid Environmental Permits /
Licenses during the reporting period.
Section 4 Monitoring
Requirements – summarizes all monitoring
parameters, monitoring methodology and equipment, monitoring locations,
monitoring frequency, criteria and respective event and action plan and
monitoring programmes.
Section 5 Monitoring
Results – summarizes the monitoring
results obtained in the reporting period.
Section 6 Compliance Audit – summarizes
the auditing of monitoring results, all exceedances environmental
parameters.
Section 7 Environmental Site Audit – summarizes the findings of weekly site inspections
undertaken within the reporting period, with a review of any relevant follow-up actions within the reporting period.
Section 8 Complaints,
Notification of summons and Prosecution – summarizes the cumulative statistics on complaints, notification of summons and
prosecution
Section 9 Conclusion
2.1.1.
The Development of Anderson Road Quarry (ARQ) Site is to provide land
and the associated infrastructures for the proposed land uses at the existing
ARQ site at the north-eastern of East Kowloon.
2.1.2.
In addition to the site formation and infrastructure works within the
ARQ site, a new bus-to-bus interchange (BBI) at the toll plaza of Tseung Kwan O
Tunnel and a series of associated off-site road improvement works and pedestrian
connectivity facilities are also proposed to mitigate the potential cumulative
traffic impact arising from the proposed ARQ development.
2.1.3.
The Project under Environmental Permit (EP) (EP No. EP-513/2016) is for
the three associated of-site road improvement works which comprises: (i)
improvement of junction of (J/O) Lin Tak Road / Sau Mau Ping Road (RIW3) (ii)
widening and improvement of sections of Clear Water Bay Road and On Sau Road
(RIW2); and (iii) widening and improvement of sections of New Clear Water Bay
Road and Shun Lee Tsuen Road (RIW1). The location of the Project is shown Figure 2.1.
2.2.1.
The project contains various Schedule 2 Designated Projects (DPs) that,
under the EIAO, require EPs to be granted by the DEP before they may be either
constructed or operated. Table 2.1 summarises the DPs under this
Project.
Table 2.1 Schedule 2 Designated Projects under this
Project
Item |
Designated Project |
EIAO Reference |
DP2
|
A
road which is an expressway, trunk road, primary distributor road or district
distributor road including new roads, and major extensions or improvements to
existing road |
Schedule
2, Part I, A.1 |
2.3.1
Civil Engineering and Development Department is the overall project
controllers for the Project. For the construction phase of the Project, Project
Engineer, Contractor(s), Environmental Team and Independent Environmental
Checker are appointed to manage and control environmental issues.
2.3.2
The proposed project organization and lines of communication with
respect to environmental protection works are shown in Figure 2.2. Key personnel and contact
particulars are summarized in Table 2.2:
Table 2.2 Contact
Details of Key Personnel
Party |
Role |
Post |
Name |
Contact
No. |
Contact
Fax |
AECOM |
Engineer’s
Representative |
Senior
Resident Engineer |
Mr. Brad Chan |
5506 0068 |
2473 3221 |
Chun
Wo – China Metallurgical Group Corporation Joint Venture |
Contractor
|
Site
Agent |
Mr. Chris Lam |
9801 9974 |
3965 9854 |
Environmental
Officer |
Miss King Lam |
9570 6187 |
|||
Independent Environmental
Checker (IEC) |
Independent Environmental Checker (IEC) |
Mr. Adi Lee |
|||
Environmental Team (ET) |
Environmental Team Leader (ETL) |
Mr. Sam Lam |
6178 3179 |
2882 3331 |
2.4.1 In the reporting month, the
principal work activities conducted are as follow.
Works in Road
Improvement Works 1 (RIW1)
·
Preparation works for ELS at RWC2 Type 1 and 1a area are in progress;
·
No fine concrete construction at RWC2 area is in progress;
·
Sheetpile installation at KS27 is in progress;
·
Sheetpile installation at FE1 is in progress;
·
Construction of Slip Road 2 drainage works is in progress;
·
Construction of piezometer at RWC2 completed; and
·
Drilling holes for NDT for determination existing bored piles at Lee On
Flyover is in progress.
Works in Road Improvement Works 2
(RIW2)
·
Soil nail installation at Zone 3 and 4 are in
progress; and
·
Site clearance for Portion 5 is in progress
Works in Road Improvement Works 3
(RIW3)
·
Form haul-road & pre-drilling at slope D1 is in-progress;
·
Excavate
trial-pit at Slope D2 are in-progress;
·
Rock excavation works using drill and split method at Slope D3 along Lin
Tak Road are in-progress;
·
Installation of chain link fence and vehicular gates at EPD access road
at Slope D3 is underway
2.4.2
In coming reporting 2 months, the scheduled construction activities are
listed as follows:
·
Site formation and temporary soil nail installation at RWC2 Type 1 &
1a (RIW1);
·
Site formation and temporary soil nail installation for RIW2 Type 6,7
& 8 (RIW1);
·
Piling Platform 1 & 2 construction at RWC2 Type 4-6 area (RIW1);
·
No-fines concrete construction at RWC2 area (RIW1);
·
Construction of drainage works at Slip Road 2 (RIW1);
·
ELS construction at KS27 (RIW1);
·
ELS construction at FE1 (RIW1);
·
Soil nail installation at Slope C1 at Zone 4 and 5 (RIW2);
·
Site clearance and slope profile formation at Slope C1 at Zone 5 & 6
(RIW2);
·
Removal of Lamp posts and erect temporary lamp posts (RIW2);
·
Piling Platform erection and Sheetpile installation for Portion 5
(RIW2);
·
Stage 1 rock excavation at Slope D3 (RIW3);
·
Retaining wall construction at Slope D3 (RIW3);
·
Shotcreting works at Slope D1 (RIW3);
·
Pre-drilling works at Slope D1 (RIW3);
·
Mass concrete wall construction at Slope D2 (RIW3).
·
Laying of lighting cable
(BBI-Toilet).
3.1.1.
A summary of the current status on licences and/or permits on
environmental protection pertinent to the Project is shown in Table 3.1.
Table 3.1 Summary of the
current status on licences and/or permits on environmental protection pertinent
to the Project
Permits and/or Licences |
Permit. No. / Account No. |
Valid
From |
Expiry
Date |
Status |
Notification pursuant to
Air Pollution Control (Construction Dust) Regulation |
Form NA submitted to EPD
on 29 May 2018. |
|||
Environmental Permit |
EP-513/2016 |
20 Jul 2016 |
N/A |
Valid |
Construction
Noise Permit (CNP) |
||||
Nil |
Nil |
Nil |
Nil |
Nil |
Billing Account for Disposal |
||||
Billing
Account for Disposal of Construction Waste |
7031075 |
20
Jul 2018 |
End of the Project |
Valid |
Chemical Waste Registration |
||||
Registration
as a Waste Producer for Sau Mau Ping Road to Lin Tak Road |
5213-294-C4239-04 |
6 Aug 2018 |
N/A |
Valid |
Registration
as a Waste Producer for Sau Mau Ping Area between Him Tat House and Sau Mau
Ping Salt Water Service Reservoir |
5213-293-C4239-05 |
6 Aug 2018 |
N/A |
Valid |
Registration
as a Waste Producer for New Clear Water Bay Road (Start from 46 Clear Water
Bay Road, End at Shun Lee Tsuen Road and San Lee Street |
5213-291-C4239-02 |
13 Aug 2018 |
N/A |
Valid |
Registration
as a Waste Producer for South Part of Hiu Ming Street Playground |
5213-294-C4239-03 |
6 Aug 2018 |
N/A |
Valid |
Registration
as a Waste Producer for Clear Water Bay Road and New Clear Water Bay Road
(From the intersection of Fei Ngo Shan Road to Tai Pan Court) and on Sau Road
(From the intersection of New Clear Water Bay Road to 9 Anderson Road |
5213-831-C4239-08 |
6 Aug 2018 |
N/A |
Valid |
Registration
as a Waste Producer for Sau Mau Ping Area Between Anderson Road and On Sau
Road, next to Oi Tat House |
5213-292-C4239-06 |
6 Aug 2018 |
N/A |
Valid |
Water Discharge Licence |
||||
Water
Pollution Ordinance Licence for Lin Tak Road to Sau Mau Ping Road including
Tseung Kwan O Tunnel Toll Plaza |
WT00032742-2018 |
18
Jan 2019 |
31 Jan 2024 |
Valid |
Water
Pollution Ordinance Licence for Sau Mau Ping Area between Anderson Road and
On Sau Road, next to Oi Tat House |
WT00033223-2019 |
31
Jan 2019 |
31 Jan 2024 |
Valid |
Water
Pollution Ordinance Licence for Sau Mau Ping Area at south part of Hiu Ming
Street playground |
WT00033224-2019 |
21
Mar 2019 |
31 Mar 2024 |
Valid |
Water
Pollution Ordinance Licence for intersection of Fei Ngo Shan Road to Tai Pan
Court and on Sau Road (From the intersection of New Clear Water Bay Road to 9
Anderson Road |
WT00033299-2019 |
5
Mar 2019 |
31 Mar 2024 |
Valid |
Water
Pollution Ordinance Licence for Sau Mau Ping area between Him Tat House and
Sau Mau Ping Salt Water service Reservoir |
WT00033229-2019 |
24 Jun 2019 |
30 Jun 2024 |
Valid |
3.2.1.
A summary of the current status on submission under EP-513/2016 is shown
in Table 3.2.
Table 3.2 Summary of
submission status under EP-513/2016
Submission |
Date of Submission |
|
Condition 1.12 |
Notification
of Commencement Date of Works |
24
September 2018 |
Condition
2.10 |
Management
Organization of Main Construction Companies |
27
September 2018 |
Condition
2.11 |
Submission
of Design Drawing(s) of the Project |
28
September 2018 |
Condition
2.12 |
Submission
of Landscape and Visual Mitigation Plan(s) |
28
September 2018 |
Condition
2.14 (a) and 2.15 |
Submission
of Detailed Vegetation Survey Report (2nd
submission) |
7
December 2018 |
Condition
2.14 (b) and 2.15 |
Submission
of Transplantation Proposal |
7
December 2018 |
Condition
3.3 |
Submission
of Baseline Environmental Monitoring Report (2nd
submission) |
18
December 2018 |
Condition
2.14 (c) |
Transplantation
Completion Report |
3
May 2019 |
Condition
3.4 |
Monthly
EM&A Report (July) |
14
August 2019 |
Noise Monitoring Stations
4.1.1.
The noise monitoring stations for the Project are listed and shown in Table
4.1 and Figure 4.1 & 4.2.
Table 4.1 Noise Monitoring Station
Monitoring Station ID |
Monitoring Location |
Measurement Type |
Level (in terms of no. of floor) |
Kei Shun Special School |
Façade |
G/F |
|
NMC02 |
Shun Lee Disciplined
Services Quarters Block 6 |
Façade |
3/F podium |
NMC03 |
Sienna Garden Block 6 |
Free-field |
G/F |
NMC04 |
Po Tat Estate Tat Kai House |
Free-field |
3/F podium |
NMC05 |
Hong Wah Court Block B Yee
Hong House |
Façade |
G/F |
Noise Monitoring
Parameters, Frequency and Duration
4.1.2.
Noise monitoring shall be carried out at all the designated monitoring
stations. The monitoring frequency shall depend on the scale of the
construction activities. The following is an initial guide on the regular
monitoring frequency for each station on a weekly basis when noise generating
activities are underway:
·
One set of measurements between 0700-1900 hours on
normal weekdays (six consecutive Leq/5min readings);
·
One set of measurements between 1900-2300 hours;
·
One set of measurements between 2300-0700 hours of
next day; and
·
One set of measurements between 0700-2300 hours on
holidays (three consecutive Leq/5min readings).
4.1.3.
For the latter 3 sets of measurements specified in Section 4.1.2 above,
one set of measurements shall at least include 3 consecutive Leq (5min)
results.
4.1.4.
Supplementary information for data auditing, statistical results such as
L10 and L90 shall also be obtained for reference.
4.1.5.
If a school exists near the construction activity, noise monitoring
shall be carried out at the monitoring stations for the schools during the
examination periods. The ET leader shall liaise with the school’s personnel and
the examination authority to ascertain the exact dates and times of all
examination periods during the course of the contract.
Monitoring Equipment
4.1.6.
Noise monitoring was performed
using sound level meter at the
designated monitoring locations.
The sound level meters shall comply with the
International Electrotechnical Commission
Publications 651:1979
(Type
1) and
804:1985 (Type 1)
specifications.
Acoustic calibrator shall
be deployed to check the sound level meters at a known sound pressure level. Brand and model of the equipment is given in Table
4.2.
Table 4.2 Noise
Monitoring Equipment
Equipment |
Brand
and Model |
Series Number |
Integrated
Sound Level Meter |
NTi XL2 |
A2A-15269-E0 |
Larson Davis LxT |
0005098 |
|
Acoustic Calibrator |
Larson Davis CAL200 |
13098 13437 |
4.1.7. The calibration certificates of the noise monitoring
equipment are attached in Appendix 4.2.
Sampling Procedure and
Monitoring Equipment
4.1.8.
Monitoring Procedure
(a)
The monitoring station shall normally
be at a point 1m from the exterior of the sensitive receiver’s building façade
and be at a position 1.2m above the ground.
(b)
Façade measurements were made at the
monitoring locations. For free-field measurement, a correction factor of +3 dB (A)
would be applied.
(c)
The battery condition was checked to
ensure the correct functioning of the meter.
(d)
Parameters such as frequency weighting,
the time weighting and the measurement time were set as follows:
(e)
Frequency weighting: A, Time weighting:
Fast, Measurement time set: continuous 5 mins
(f)
Prior and after to the noise
measurement, the meter was checked using the acoustic calibrator for 94dB (A)
at 1000 Hz. If the difference in the calibration level before and after
measurement was more than ±1 dB (A), the measurement would be considered
invalid and repeat of noise measurement would be required after re-calibration
or repair of the equipment.
(g)
Noise measurements shall not be made in
fog, rain, wind with a steady speed exceeding 5m/s or wind with gusts exceeding
10m/s. The wind speed shall be checked with a portable wind speed meter capable
of measuring the wind speed in m/s.
4.1.9.
Maintenance and Calibration
(a)
The microphone head of the sound level
meter was cleaned with soft cloth at regular intervals.
(b)
The sound level meter and calibrator
were calibrated at yearly intervals.
EVENT and action plan
4.1.10. Noise Standards for Daytime Construction Activities are
specified under EIAO-TM. The Action and Limit levels for construction noise are
defined in Table 4.3 and Appendix 4.1. Should non-compliance of the
criteria occurs, action in accordance with the Event and Action Plan in Appendix 6.1
shall be carried out.
Table 4.3 Action and
Limit Level for Noise Monitoring
Monitoring Station |
Action Level |
Limit Level (dB(A)) |
||
0700-1900 hrs on normal weekdays |
0700-2300 hrs on holidays (including Sundays); and
1900-2300 hrs on all days 2 |
2300-0700 hrs of all days 2 |
||
NMC01 |
When one documented complaint is received |
65 / 70 1 |
60 / 65 / 70 3 |
45 / 50 / 55 3 |
NMC02 |
75 |
|||
NMC03 |
75 |
|||
NMC04 |
75 |
|||
NMC05 |
75 |
Remark 1: Limit level of NMC01 - Kei Shun Special School reduce to 65 dB
(A) during examination periods if any.
Remark 2: Construction noise during restricted hours is under the
control of Noise Control Ordinance Limit Level to be selected based on Area
Sensitivity Rating.
Remark 3: Limit Level for restricted hour monitoring shall act as
reference level only. Investigation would be conducted on CNP compliance if
exceedance recorded during restricted hour noise monitoring period.
Air Quality Monitoring
Stations
4.2.1.
The air monitoring stations for the Project are listed and shown in Table
4.4 and Figure 4.3 & 4.4.
Table 4.4 Air Monitoring
Station
Monitoring
Station ID |
Monitoring Location |
Level (in terms of no. of floor) |
NCWBR_AMS-1 |
Shun Lee Fire Station |
2/F Roof |
NCWBR_AMS-2 |
Shun Lee Estate Lee
Hang House |
G/F |
NCWBR_AMS-3 |
Shun Lee Disciplined
Services Quarters (Block 6) |
4/F podium |
NCWBR_AMS-4 |
Sienna Garden |
G/F |
NCWBR_AMS-5 |
Shun Chi Court Shun
Fung House |
Roof |
LTR_AMS-1 |
St Edward's Catholic
Primary School |
G/F |
LTR_AMS-2 |
Environmental
Protection Department's Restored Landfill Site Office |
G/F |
LTR_AMS-3 |
Po Tat Estate Tat Kai
House |
3/F podium |
Air Monitoring Parameters,
Frequency and Duration
4.2.2.
One-hour TSP levels should be measured to indicate the impacts of
construction dust on air quality.
4.2.3.
The sampling frequency of at least three times in every six-days should
be undertaken when the highest dust impact occurs.
Sampling Procedure and
Monitoring Equipment
4.2.4.
Monitoring Procedures
(a)
Check the calibration period of
portable direct reading dust meter prior to monitoring (The direct reading dust
meter was calibrated at 2-years interval and checked with High Volume Sampler
(HVS) yearly.)
(b)
Record the site condition near / around
the monitoring stations.
(c)
Install the portable direct reading
dust meter to the monitoring location.
(d)
Slide the power switch to turn the
power on.
(e)
Check of portable direct reading dust
meter to ensure the equipment operation in normal condition.
(f)
Select the period of measurement to
60mins.
(g)
Check and set the correct time.
(h)
Select the appropriate unit display for
the equipment.
(i)
Slide the power switch to turn the
power off when the monitoring period ended (3 times 1 hour TSP monitoring per
day).
(j)
Uninstall the portable direct reading
dust meter
(k)
Collected the sampled data for
analysis.
(l)
Remark: Procedures (c) to (h) may be
different subject to the brands and models of portable direct reading dust meter
4.2.5.
Maintenance and Calibration
(a)
The direct reading dust meter was
calibrated at 2-years interval and checked with High Volume Sampler (HVS)
yearly to determine the accuracy and validity of the results measured.
(b)
Checking of direct reading dust meter will
be carried out in order to determine the conversion factor between the direct
reading dust meter and the standard equipment, HVS. The comparison check is to
be considered valid based on correlation coefficient checked by HOKLAS
laboratory.
4.2.6.
The 1-hour TSP air quality monitoring was performed by using portable
direct reading dust meters at each designated monitoring station. The brand and
model of the equipment are given in Table
4.5.
Table 4.5 Air Quality
Monitoring Equipment
Equipment |
Brand
and model |
Series
Number |
Portable
direct reading dust meter |
Met One
BT- 645 |
X19299 X19298 X19297 R22586 R22584 |
Met One
AEROCET 831 |
R14332 W14016 W15448 W15449 |
|
HAL HPC301 |
3011907012 |
4.2.7.
The calibration certificates of the air quality monitoring equipment are
attached in Appendix 4.2.
Wind Data
4.2.8.
The representative wind data from Tate’s Cairn HKO Automatic Weather
Station and Tseung Kwan O HKO Automatic Weather Station were obtained covering
the 1-hr TSP monitoring periods. The wind data were extracted and shown in Appendix 4.3.
EVENT and action plan
4.2.9.
The Action and Limit levels for construction air quality are defined in Table 4.6 and Appendix
4.1. Should non-compliance of the air quality criteria occur, action in
accordance with the Event and Action Plan in Appendix
6.1 shall be carried out.
Table 4.6 Action and
Limit Level for Air Quality Monitoring
Monitoring
Locations |
1-hour TSP Level
in μg/m3 |
|
Action Level |
Limit Level |
|
NCWBR_AMS-1 |
284.4 |
500.0 |
NCWBR_AMS-2 |
282.4 |
500.0 |
NCWBR_AMS-3 |
287.9 |
500.0 |
NCWBR_AMS-4 |
281.6 |
500.0 |
NCWBR_AMS-5 |
270.0 |
500.0 |
LTR_AMS-1 |
272.1 |
500.0 |
LTR_AMS-2 |
281.1 |
500.0 |
LTR_AMS-3 |
285.1 |
500.0 |
WATER QUALITY MONITORING STATIONS
4.3.1.
Water quality monitoring was undertaken at 4 monitoring stations in the
reporting month. The proposed water quality monitoring stations of the Project
are shown in Table 4.7 and Figure 4.5 & 4.6.
Table 4.7 Marine Water Quality Stations for Water
Quality Monitoring
Inland Water |
Stations |
Description |
Easting |
Northing |
Channelized nullah across the Project site |
E |
Upstream Control Station |
841329 |
821753 |
F |
Downstream Impact Station |
841469 |
821635 |
|
Ma Yau Tong Stream |
H |
Upstream Control Station |
843008 |
819880 |
I |
Downstream Impact Station |
842652 |
819573 |
Water Quality Parameters,
Frequency and Duration
4.3.2.
The levels of dissolved oxygen (DO), turbidity and pH shall be measured
in situ while suspended solids (SS) is determined by laboratory analysis at all
the designated monitoring stations.
4.3.3.
In association with the water quality parameters, other relevant data
shall also be recorded, such as monitoring location / position, time, water
temperature, salinity, DO saturation, weather conditions, and any special
phenomena underway near the monitoring station.
4.3.4.
The sampling frequency of at least three days per week should be
undertaken when the highest dust impact occurs. Upon completion of the
construction works, the monitoring exercise at the designated monitoring
locations should be continued for four weeks in the same manner as the impact monitoring.
4.3.5.
The interval between two sets of monitoring should not be less than 36
hours except where there are exceedances of Action and/or Limit Levels, in
which case the monitoring frequency will be increased.
4.3.6.
Replicate in-situ measurements should be carried out in each sampling
event.
Sampling Procedures and
Monitoring Equipment
Dissolved Oxygen And Temperature Measuring
Equipment
4.3.7.
The instrument should be a portable, weatherproof dissolved oxygen
measuring instrument complete with cable, sensor, comprehensive operation
manuals, and use a DC power source. It should be capable of measuring:
·
a
dissolved oxygen level in the range of 0-20 mg/l and 0-200% saturation
·
a
temperature of 0-45 degree Celsius
4.3.8.
It should have a membrane electrode with automatic temperature
compensation complete with a cable. Sufficient stocks of spare electrodes and
cables should be available for replacement where necessary. (e.g. YSI model 59
meter, YSI 5739 probe, YSI 5795A submersible stirrer with reel and cable or an
approved similar instrument).
4.3.9.
Should salinity compensation not be build-in in the DO equipment,
in-situ salinity shall be measured to calibrate the DO equipment prior to each
DO measurement.
Turbidity Measurement Instrument
4.3.10.
The instrument should be a portable, weatherproof turbidity-measuring
instrument complete with comprehensive operation manual. The equipment should
use a DC power source. It should have a photoelectric sensor capable of
measuring turbidity between 0‑1000 NTU and be complete with a cable (e.g. Hach
model 2100P or an approved similar instrument).
Sampler
4.3.11. Due to low water level as mentioned
in Section 6.4.3 of the EIA report, bucket sampler (Approximate 1L) will be use
instead of water sampler in order to obtain surface water sample without
disturb the stream sediment and collect representative results.
Salinity
4.3.12.
A portable salinometer capable of measuring salinity in the range of 0-70
ppt shall be provided for measuring salinity of the water at each of monitoring
location.
Monitoring Methodology
4.3.13.
Monitoring Procedure
(a)
The condition near the monitoring
stations shall be observed and recorded on the data log sheet.
(b)
Check of sensors and electrodes with
certified standard solutions before each use.
(c)
Wet bulb calibration for a DO meter
should be carried out before measurement.
(d)
Sample would be taken using bucket
sampler at surface level.
(e)
Transfer the sampled water carefully
into cleaned water bottles (2x 1000ml) provided by the laboratory at the spot
after the collection of the water sample for the subsequent laboratory
Suspended Solid testing.
(f)
Transfer the sampled water from the
bucket sampler to the rinsed water container for in-situ measurement (In case
of the in-situ measurement cannot be carried at spot due to safety and adverse
weather condition, sampled water from the bucket sampler will be transfer to
cleaned water bottles provided by laboratory. Then, In-situ measurement will be
conducted at a safe location which sampled water inside cleaned water bottle
will be transfer to the rinsed water container for in-situ measurement) In-situ
measurement shall be measured in duplicate.
(g)
Parameters including Water Temperature
(℃), pH (units), Salinity (ppt), DO (mg/L), DO saturation (%) will be measured
by the Multifunctional Meter and Turbidity (NTU) will be measured by turbid
meter. (Water Temperature and Salinity will be measured as reference
parameters)
(h)
Record the result on the data log sheet
and record any special finding during / after in-situ measurement.
(i)
The water sample bottles will be stored
in a cool box (at cooled to 4℃ without being frozen), which shall be delivered
to HOKLAS laboratory (ALS Technichem (HK) Pty Ltd) for further testing to
determine the level of SS.
4.3.14.
Maintenance and Calibration
(a)
The responses of sensors and electrodes
of the water quality monitoring equipment were cleaned and checked at regular
intervals.
(b)
DO meter (Multifunctional Meter) and
turbid meter was certified by a laboratory accredited under HOKLAS or any other
international accreditation scheme, and subsequently re-calibrated at three
monthly intervals.
4.3.15.
Brand and model of the equipment are given in Table 4.8.
Table 4.8 Water Quality Monitoring Equipment
Equipment |
Brand and model |
Series Number |
Multifunctional Meter |
YSI
Professional Plus |
14K100322 14M100277 |
Turbid meter |
Xin Rui WGZ-3B |
1807063 1807069 |
4.3.16.
The calibration certificates of the water quality monitoring equipment
are attached in Appendix 4.2.
Laboratory Measurement /
Analysis
4.3.17.
Analysis of suspended solids has been carried out in a HOKLAS accredited
laboratory, which is ALS Technichem (HK) Pty Ltd.
EVENT and action plan
4.3.18.
The Action and Limit levels for construction water quality are defined
in Table 4.9 and Appendix 4.1.
Should the monitoring results of the water quality parameters at any designated
monitoring station exceed the water quality criteria, action in accordance with
the Event and Action Plan in Appendix 6.1
shall be carried out.
Table 4.9 Action and
Limit Level for Water Quality Monitoring
Monitoring Station |
Surface pH |
Surface DO (mg/L) |
Surface Turbidity (NTU) |
Surface SS (mg/L) |
||||
Action Level |
Limit Level |
Action Level |
Limit Level |
Action Level |
Limit Level |
Action Level |
Limit Level |
|
E |
- |
- |
- |
- |
- |
- |
- |
- |
F |
Beyond
the range of 6.6-8.4 |
Beyond
the range of 6.5-8.5 |
5.8 |
5.5 |
24.4 |
32.7 |
17.0 |
23.8 |
H |
- |
- |
- |
- |
- |
- |
- |
- |
I |
Beyond
the range of 6.6-8.4 |
Beyond
the range of 6.5-8.5 |
5.5 |
5.4 |
206.9 |
214.2 |
172.8 |
201.4 |
*Remarks:
The value of
1.0mg/L was taken as the value for measurement with suspended solid level of
<1.0mg/L for Action and Limit level calculation.
It is
recommended that upstream monitoring station (monitoring station E and H) would
be taken as control reference for exceedance investigation only. Action and
limit level would not be establish using the baseline data.
5.0.1
The environmental monitoring
will be implemented based on the division of works areas of each designed
projects. Overall layout showing work areas and monitoring stations is shown in
Figure 2.1 and Figure 4.1
– 4.6 respectively.
5.0.2
The environment monitoring
schedules for reporting month and coming month are presented in Appendix 5.1.
5.1.1
All noise monitoring was
conducted as scheduled in the reporting month.
5.1.2
On 26 August 2019 at NMC01, the average
noise level was greater than the limit level, but after considering the
baseline level, the construction noise level calculated was lower than the
limit level. Therefore, no action or limit level exceedance was recorded in the
reporting period.
5.1.3
On 7, 13 and 19 August 2019 at NMC03,
the average noise level was greater than the limit level, but after considering
the baseline level, the construction noise level calculated was lower than the
limit level. Therefore, no action or limit level exceedance was recorded in the
reporting period.
5.1.4
There was no examination period for NMC01 during the reporting period.
5.1.5
Noise monitoring results
measured in this reporting period are reviewed and summarized. Details of noise
monitoring results and graphical presentation can be referred in Appendix 5.2.
5.2.1
All 1-hour TSP monitoring was
conducted as scheduled in the reporting month.
5.2.2
No action or limit level
exceedance was recorded in the reporting period.
5.2.3
One action level exceedance was
recorded at Station LTR_AMS-3 (Po Tat Estate) on 24 August 2019 in the
reporting period. Repeat measurement was conducted on 26 August 2019, and no
exceedance was recorded. After investigation, the exceedance was mainly by the
overall poor air quality of the environment and not project related.
5.2.4
Air quality monitoring results
measured in this reporting period are reviewed and summarized. Details of air monitoring results and
graphical presentation can be referred in Appendix 5.3.
5.3.1 All water quality monitoring was
conducted as scheduled in the reporting month.
5.3.2 No water can be
collected at Station AC1 on 2, 6, 9, 11, 13, 16, 18, 20, 23, 25, 27 and 30 September
2019 as the station was dried out during the monitoring scheduled in the
reporting month.
5.3.3 No water can be collected at Station E
on 18, 20, 23, 25, 27 and 30 September 2019 as the station was dried out during
the monitoring scheduled in the reporting month.
One (1) suspended solid limit level exceedance
was recorded at Station F on 9 September 2019.
One (1) suspended solid action level
exceedance was recorded at Station F on 6 September 2019.
One (1) suspended solid limit level
exceedance was recorded at Station I on 13 September 2019.
Investigation of the other exceedances were
still in progress and would be reported in the coming report.
For the exceedances in August, after
investigation, the exceedances at Station F on 1, 3, 9, 23, 26, 28 and 30
August 2019 and the exceedances at Station I on 3 and 16 August 2019 were not
related to project activities. Discharge of silty water into the drainage
possibly connecting to station F was observed on 19 October 2019, hence, the
exceedance was project related.
.
5.3.4
Water quality monitoring results measured in this reporting period are
reviewed and summarized. Details of water quality monitoring results and
graphical presentation can be referred in Appendix 5.4.
5.4.1
The quantities of waste for disposal in the Reporting Period are
summarized in Table 5.1 and Table 5.2. The Monthly Summary Waste
Flow Table is shown in Appendix 5.5. Whenever possible, materials were
reused on-site as far as practicable.
Table 5.1 Summary of Quantities of Inert C&D Materials
Waste Type |
Quantity (this month) |
Quantity (Project commencement to the end of last month) |
Cumulative
Quantity-to-Date |
Disposal Location |
Hard Rock and Large Broken Concrete (Inert) (in ‘000m3) |
0 |
0 |
0 |
Nil |
Reused in this Contract (Inert) (in ‘000m3) |
0.473 |
0 |
0.473 |
Nil |
Reused in other Projects (Inert) (in ‘000m3) |
1.583 |
2.28 |
3.863 |
Nil |
Disposal as Public Fill (Inert) (in ‘000m3) |
1.474 |
10.052 |
11.526 |
TKO137 |
Table 5.2 Summary of Quantities of C&D Wastes
Waste Type |
Quantity (this month) |
Quantity (Project
commencement to the end of last month) |
Cumulative
Quantity-to-Date |
Disposal Location |
Metals (in ‘000kg) |
0.000 |
0.032 |
0.032 |
Nil (waste recycle was arranged) |
Paper / Cardboard Packing (in ‘000kg) |
0.000 |
0.678 |
0.678 |
Nil (waste recycle was arranged) |
Plastics (in ‘000kg) |
0.000 |
0.047 |
0.047 |
Nil (waste
recycle was arranged) |
Chemical Wastes (in ‘000kg) |
0 |
0 |
0 |
Nil |
General Refuses (in ‘000m3) |
0.054 |
0.266 |
0.321 |
SENT |
6.0.1.
The Event Action Plan for construction noise, air quality and water
quality are presented in Appendix 6.1.
6.0.2.
The summary of exceedance is presented in Appendix 6.2.
6.1.1 No action or limit level exceedance was
recorded in the reporting period.
6.2.1
No action or limit level exceedance was recorded in the reporting
period.
6.2.2
One action level exceedance was recorded at Station LTR_AMS-3 (Po Tat
Estate) on 24 August 2019 in the reporting period. Repeat measurement was
conducted on 26 August 2019, and no exceedance was recorded. After investigation,
the exceedance was mainly by the overall poor air quality of the environment
and not project related.
6.3.1
No water can be collected at Station AC1 on 2, 6, 9, 11, 13, 16, 18, 20,
23, 25, 27 and 30 September 2019 as the station was dried out during the
monitoring scheduled in the reporting month.
One (1) suspended solid limit level exceedance
was recorded at Station F on 9 September 2019.
One (1) suspended solid action level
exceedance was recorded at Station F on 6 September 2019.
One (1) suspended solid limit level
exceedance was recorded at Station I on 13 September 2019.
Investigation of the other exceedances were
still in progress and would be reported in the coming report.
For the exceedances in August, after
investigation, the exceedances at Station F on 1, 3, 9, 23, 26, 28 and 30
August 2019 and the exceedances at Station I on 3 and 16 August 2019 were not
related to project activities. Discharge of silty water into the drainage
possibly connecting to station F was observed on 19 October 2019, hence, the
exceedance was project related.
6.4.1
No environmental non-compliance was recorded in the reporting month.
6.5.1
There was no particular action taken since no non-compliance was
recorded in the reporting period.
7.0.1.
Within this reporting month, weekly environmental site audits were
conducted on 6, 13, 19
and 27 September 2019. IEC attended the joint site inspection on 6 September 2019.
7.0.2. No non-compliance was found during
the site inspection while reminders on environmental measures were recommended.
Results and findings of these inspections in this reporting month are
listed below in Table 7.1.
Table 7.1 Summary of
Environmental Inspections
Date |
Item |
Reminder(s)/ Observation(s) |
Action taken by Contractor |
Outcome |
6-9-2019 |
20190906_01 |
Site
boundary shall be protected to prevent site runoff to the nearby gully. |
Sand bags
has been provided. |
Completion
as observed on 19 September 2019. |
6-9-2019 |
20190906_02 |
The
current wastewater treatment facility shall be reviewed to enhance the
treatment efficiency. The pH was found high and shall adjust the pH dosage. |
The pH was
observed within the range around 8 |
Completion
as observed on 19 September 2019. |
19-9-2019 |
20190919_01 |
Silty
water was observed discharging into public drainage. The contractor need to
review the desilting facilities in order to ensure the discharge can meet the
requirement of discharge licence. |
The treatment facilities have been functioned properly. |
Completion
as observed on 25 September 2019. |
27-9-2019 |
20190927_01 |
Drip tray
should be provided to prevent the leakage of chemical. (RIW3 D1 slope) |
Pending |
Pending |
27-9-2019 |
20190927_02 |
The height
of the noise barrier at Lin Tak Road need to be reviewed to cover the working
machines as much as possible. (RIW3) |
Pending |
Pending |
7.0.3.
Within this reporting month, biweekly landscape site audits were
conducted on 11 and 25 September 2019.
7.0.4.
No non-compliance was found during the landscape site inspection. Results
and findings of these inspections in this reporting month are listed below in Table 7.2.
Table 7.1 Summary of
Landscape site inspections
Date |
Item |
Reminder(s)/ Observation(s) |
Action taken by Contractor |
Outcome |
11 Sep 2019 |
20190911_1 |
General weeding should be carried
out within tree planting area to avoid competition with transplanted trees. |
General
weeding has been carried out. |
Completed as observed on 25 September
2019. |
11 Sep 2019 |
20190911_2 |
Construction
materials, machines and any other equipment should not be placed within tree
protection zone (RIW 3). |
Construction
materials/ equipment have been removed. |
Completed
as observed on 25 September 2019. |
11 Sep
2019 |
20190911_3 |
Construction
materials & equipment should not be placed within tree protection zone
(RIW 1). |
Construction
materials/ equipment have been removed. |
Completed
as observed on 25 September 2019. |
8.0.1.
No environmental complaint was received in the reporting period.
8.0.2.
The details of cumulative complaint log and updated summary of
complaints are presented in Appendix 8.1.
8.0.3.
Cumulative statistic on complaints and successful prosecutions are
summarized in Table 8.1 and Table 8.2 respectively.
Table 8.1 Cumulative Statistics
on Complaints
Reporting
Period |
No.
of Complaints |
September
2019 |
0 |
Project
commencement to the end of last reporting month |
0 |
Total |
0 |
Table 8.2 Cumulative
Statistics on Successful Prosecutions
Environmental
Parameters |
Cumulative
No. Brought Forward |
No.
of Successful Prosecutions this month (Offence Date) |
Cumulative
No. Project-to-Date |
Air |
- |
0 |
0 |
Noise |
- |
0 |
0 |
Water |
- |
0 |
0 |
Waste |
- |
0 |
0 |
Total |
- |
0 |
0 |
9.0.1.
The EM&A programme was carried out in accordance with the EM&A
Manual requirements, minor alterations to the programme proposed were made in
response to changing circumstances.
9.0.2.
The performance of the environmental management system of the previous
three months (quarter) was generally satisfied. Mitigation measures according
to the environmental mitigation implementation schedule and the EIA were
generally implemented by the Contractor. Hence, the EM&A programme was
considered effective and shall be maintained. The status of the water quality
station shall be kept in view, as station E usually was dried out.
9.0.3.
The scheduled construction activities and the recommended mitigation
measures for the coming 2 months are listed in Table 9.1. The construction programmes of the Project are provided
in Appendix 9.1.
Table 9.1 Construction Activities and Recommended
Mitigation Measures in Coming Reporting 2
Months
Key Construction Works |
Recommended Mitigation Measures |
·
Site formation and temporary soil nail installation at RWC2 Type 1
& 1a (RIW1); ·
Site formation and temporary soil nail installation for RIW2 Type 6,7
& 8 (RIW1); ·
Piling Platform 1 & 2 construction at RWC2 Type 4-6 area (RIW1); ·
No-fines concrete construction at RWC2 area (RIW1); ·
Construction of drainage works at Slip Road 2 (RIW1); ·
ELS construction at KS27 (RIW1); ·
ELS construction at FE1 (RIW1); ·
Soil nail installation at Slope C1 at Zone 4 and 5 (RIW2); ·
Site clearance and slope profile formation at Slope C1 at Zone 5 &
6 (RIW2); ·
Removal of Lamp posts and erect temporary lamp posts (RIW2); ·
Piling Platform erection and Sheetpile installation for Portion 5
(RIW2); ·
Stage 1 rock excavation at Slope D3 (RIW3); ·
Retaining wall construction at Slope D3 (RIW3); ·
Shotcreting works at Slope D1 (RIW3); ·
Pre-drilling works at Slope D1 (RIW3); ·
Mass concrete wall construction at Slope D2 (RIW3). |
·
Dust control during dust generating works; ·
Implementation of proper noise pollution control; and ·
Provision of protection to ensure no runoff out of site area or direct
discharge into public drainage system. |