EXECUTIVE SUMMARY
I.
Introduction
This
is the 7th Monthly EM&A Report prepared by Fugro Technical
Services Limited for the Contract no. HY/2018/08 Central Kowloon Route ¡V
Central Tunnel. The Contract no. HY/2018/08 commenced on 19 September 2019. This
report summarized the monitoring results and audits findings of the EM&A
programme under the issued EP (EP No.: EP-457/2013/C) and in accordance with
the EM&A Manual during the reporting period from 01/03/2020 to 31/03/2020.
II.
Summary of Main Works Undertaken and Key Measures Implemented
The
main construction works carried out in the reporting period were as follow:
¡P
Prebored H piling for ventilation shaft;
¡P
Formation of site haul road leading to Chung Hau Street;
¡P
Drill and Blast excavation for construction adit;
¡P
Mucking out from tunnel;
¡P
Construction of spoil basin;
¡P
Site installation and utilities diversion;
¡P
Erection of blast doors at construction adits;
¡P
Removal of oversize tree T143;
¡P
Trial grouting.
III.
Summary of Exceedances, Investigation and Follow-up
No
Action and Limit Level exceedance was recorded for construction dust monitoring
in the
reporting
month. No Limit Level exceedance was recorded for construction noise monitoring
in
the
reporting month.
Three
(3) Action Level exceedances were recorded for construction noise due to the
noise-related complaints received in the reporting month.
IV.
Complaint Handling, Prosecution and Public Engagement
No
notification of summons and prosecutions were received in the reporting period.
No
public engagement activities were conducted in the reporting period.
V.
Reporting Change
There
were no reporting changes during the reporting month.
VI.
Future Key Issues
The
main works will be anticipated in the next reporting period are as follow:
¡P
Formation of site haul road
leading to Chung Hau Street;
¡P
Drill and Blast excavation for
construction adit;
¡P
Mucking out from tunnel;
¡P
Construction of spoil basin;
¡P
Erection of blast doors at
construction adits;
¡P
Site installation and utilities
diversion;
¡P
Removal of oversize tree T143;
¡P
Trial grouting.
The recommended
mitigation measures corresponding to the main works in the next reporting
period are listed as follow:
¡P
Mitigation measures in form of regular watering under a good site
practice should be adopted, particularly for the earthwork and breaking activities;
¡P
Any excavated, stockpile of dusty material or load of dusty
materials on a vehicle leaving a construction site should be covered entirely
by impervious sheeting;
¡P
All construction plants / machineries should be checked / serviced
on a regular basis during the courses of construction to minimize the emission
of noise generation and eliminate dark smoke emission;
¡P
All C&D materials generated should be transported and stored at
temporary storage area. Suitable materials should be sorted for reuse on-site;
¡P
Wastewater generated from drilling shall be properly collected for
reuse or treated by wastewater treatment facilities before discharge;
¡P
Provision of drip trays for equipment likely cause spillage of
chemical / fuel, and provide routine maintenance;
¡P
Erecting temporary noise barrier for noisy Powered Mechanical
Equipment (PME) and deployment of Quality Powered Mechanical Equipment (QPME)
as many as practicable;
¡P
Mitigation measures recommended in the Landscape Mitigation Plan
shall be implemented for felling trees;
¡P
Conditions in the Environmental Permit and License should be
followed;
¡P
All recommended mitigation measures specified in the approved EIA
Report and EM&A Manual shall be implemented.
The
following EP submissions (EP-457/2013/C) were submitted during the reporting
month:
Table I Status of Required
Submission under Environmental Permit
EP Condition |
Submission |
Submission Date |
3.4 |
Monthly EM&A Report (February 2020) |
13 March 2020 |
Contents
1.3 Construction Programme and Activities
1.4 Works undertaken during the month
1.5 Status of Environmental Licences, Notification and Permits
2.1 Construction Dust and Noise Monitoring Location
2.2 Construction Dust Monitoring
2.3 Construction Noise Monitoring
2.4 Construction Dust and Noise Monitoring Schedule
2.5 The Action and Limit Levels
3.1 Construction Dust Monitoring
3.2 Construction Noise Monitoring
5.1 Complaint Handling, Prosecution and Public Engagement
5.2 Summary of Environmental Non-Compliance
Tables
Table
I ¡V Status of Required Submission under Environmental Permit
Table 1.1 ¡V Contact Information of Key Personnel
Table 1.2 ¡V Environmental Licenses, Notification
and Permits Summary
Table 2.1 ¡V Construction Dust and Noise
Monitoring Location
Table 2.2 ¡V Construction Dust Monitoring
Equipment
Table 2.3 ¡V Construction Noise Monitoring
Parameters, Frequency and Duration
Table 2.4 ¡V Construction Noise Monitoring
Equipment
Table 3.1 ¡V Summary of 1-hour TSP Monitoring
Results in the Reporting Period
Table 3.2 ¡V Summary of 24-hour TSP Monitoring
Results in the Reporting Period
Table 3.3 ¡V Summary of Construction Noise
Monitoring Results in the Reporting Period
Table 4.1 ¡V Observations and Recommendation of
Site Inspection in the Reporting Period
Table 6.1 ¡V Status of Required Submission under
Environmental Permit
Figures
Figure 1 The Site Layout Plan of the Contract
Figure 2 The Location of the Construction
Dust and Noise Monitoring Station
Appendices
Appendix A Construction Programme
Appendix
B Project Organization Chart
Appendix
C Calibration Certificate for
Construction Dust Monitoring Equipment
Appendix
D Calibration Certificate for Construction
Noise Monitoring Equipment
Appendix
E Environmental Monitoring Schedule
Appendix
F Action and Limit Levels for
Construction Dust and Noise Monitoring
Appendix G Construction
Dust Monitoring Results and Meteorological Observations
Appendix H Construction
Noise Monitoring Results
Appendix
I Event and Action Plan
Appendix
J Implementation Status of
Environment Mitigation Measures (Construction Phase)
1.
INTRODUCTION
Table 1.1 Contact
Information of Key Personnel
Party |
Position |
Name |
Telephone |
Highways Department (HyD) |
E13/CKR |
Mr. Joe Lam |
2762 3380 |
Arup-Mott MacDonald Joint Venture (AMMJV) |
Senior Resident Engineer |
Mr. Ben Poon |
3619 5967 |
ERM-Hong Kong, Limited (ERM) |
Independent Environmental
Checker (IEC) |
Ms. Mandy To |
2271 3000 |
Bouygues Travaux Publics (BTP) |
Environmental Manager |
Mr. Simon Wong |
9281 4346 |
Fugro Technical Services Limited |
ET Leader |
Mr. David Hung |
3565 4371 |
¡P
Prebored H piling for ventilation shaft;
¡P
Formation of site haul road leading to Chung Hau Street;
¡P
Drill and Blast excavation for construction adit;
¡P
Mucking out from tunnel;
¡P
Construction of spoil basin;
¡P
Site installation and utilities diversion;
¡P
Erection of blast doors at construction adits;
¡P
Removal of oversize tree T143;
¡P
Trial grouting.
Table 1.2 Environmental
Licenses, Notification and Permits Summary
Permit/ Notification/ License |
Reference No |
Valid From |
Valid Till |
Form NB |
448930,
448970, 448971 |
Mid-Sep
2019 |
NA |
Billing Account for Disposal of C&D
waste |
Account
no. 7034790 |
6 Aug 2019 |
NA |
Chemical Waste Producer Registration |
5111-236-B2557-02 |
25
Sep 2019 |
NA |
Construction Noise Permit |
GW-RE1081-19 |
6 Jan 2020 |
1 Jun 2020 |
Construction Noise Permit |
GW-RE0124-20 |
6 Mar 2020 |
31 Mar 2020 |
Water Discharge License |
WT00034873-2019 |
22 Nov 2019 |
30 Nov 2024 |
Table 2.1
Construction Dust and Noise Monitoring Location
Dust Monitoring Station ID |
Noise Monitoring Station ID |
Monitoring Location |
M-A3 |
M-N3 |
SKH Tsoi Kung Po Secondary School |
Notes:
1. The dust and noise
monitoring station proposed in the EM&A Manual (i.e. Ko Fai House, Kwun Fai
Court with ID: M-A6/ M-N6) was not available for impact dust and noise monitoring,
therefore impact monitoring was conducted at M-A3/M-N3 as an alternative which
was agreed by the ER, IEC and EPD;
2. The coordinates of SKH
Tsoi Kung Po Secondary School can be represented as follow:
Latitude: 22.314719,
Longitude: 114.180694 (HK80 Geographical Coordinates)
Monitoring Requirement
Monitoring Equipment
Table 2.2 Construction
Dust Monitoring Equipment
Equipment |
Brand |
Model |
Serial No. |
High
Volume Sampler (24-hour TSP) |
Tisch |
TE-5170 |
4388 |
Portable direct reading dust meter (1-hour TSP) |
Sibata |
Model LD-3B |
647594 |
Monitoring Methodology
for HVS
¡P
Sufficient support is provided to secure the samplers against gusty
wind.
¡P
No two samplers are placed less than 2 meters apart.
¡P
The distance between the sampler and an obstacle, such as
buildings, is at least twice the height that the obstacle protrudes above the
sampler.
¡P
A minimum of 2 meters of separation from walls, parapets and
penthouses is required for rooftop samples.
¡P
A minimum of 2 meters separation from any supporting structure,
measured horizontally is required.
¡P
No furnaces or incineration flues are nearby.
¡P
Airflow around the samplers is unrestricted.
¡P
The samplers are more than 20 meters from the drip line.
¡P
Any wire fence and gate, to protect the sampler, should not cause
any obstruction during monitoring.
¡P
Permission must be obtained to set up the samplers and to obtain
access to the monitoring stations.
¡P
A secured supply of electricity is needed to operate the samplers.
Maintenance
and Calibration for HVS
Monitoring Methodology
for Direct Reading Dust Meter
a) Pulling up
the air sampling inlet cover
b) Changing the
Mode 0 to BG
c) Pressing
Start/Stop switch
d) Turning the
knob to SENSI.ADJ and press it
e) Pressing
Start/Stop switch again
f) Returning
the knob to the position MEASURE slowly
g) Pressing the
timer set switch to set measuring time
h) Removing the
cap and start the measurement
Maintenance
and Calibration for Direct Reading Dust Meter
Monitoring
Requirement
Table 2.3
Construction Noise Monitoring Parameters, Frequency and Duration
Parameter |
Duration |
Frequency |
A-weighted
equivalent continuous sound pressure level (Leq). L10 and L90 were also recorded |
30 minutes |
At least once
per week |
Monitoring Equipment
Table 2.4 Construction
Noise Monitoring Equipment
Equipment |
Brand |
Model |
Serial No. |
Acoustic Calibrator |
Casella |
CEL-120/1 |
4358443 |
Sound Level Meter |
Casella |
CEL-63X |
4181568 |
Monitoring Methodology
a) Free field
measurements was made at monitoring location M-N3. A correction of +3 dB(A)
shall be made to the free field measurements.
b) The battery
condition should be checked to ensure good functioning of the meter.
c) Parameters
such as frequency weighting, the time weighting and the measurement time should
set as follow:
(i) Frequency
weighting: A
(ii) Time weighting: Fast
(iii) Measurement time: continuous
5 minutes interval
d) Prior to and
after noise measurement, the meter shall be calibrated using the calibrator for
94.0 dB at 1000 Hz. If the difference in the calibration level before and after
measurement is more than 1.0 dB, the measurement will be considered invalid and
repeat of noise measurement is required after re-calibration or repair of the
equipment.
e) The wind
speed at the monitoring station shall be checked with the portable wind meter.
Noise monitoring should be cancelled in the presence of fog, rain, and wind
with a steady speed exceeding 5 m/s, or wind with gusts exceeding 10 m/s.
f) Noise
measurement should be paused during periods of high intrusive noise if possible
and observation shall be recorded when intrusive noise is not avoided.
g) At the end
of the monitoring period, the Leq, L10 and L90 should be recorded. In addition,
site conditions and noise sources should also be recorded on a standard record
sheet.
Maintenance
and Calibration
a) The microphone head of the sound
level meter and calibrator should be cleaned with a soft cloth at quarterly
intervals.
b) The sound level meter and
calibrator should be calibrated annually by a HOKLAS laboratory or the
manufacturer.
The
calibration certificates for noise monitoring equipment are provided in Appendix D
Table 3.1 Summary
of 1-hour TSP Monitoring Results in the Reporting Period
Station ID |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
M-A3 |
69 |
40-94 |
333 |
500 |
Table 3.2 Summary
of 24-hour TSP Monitoring Results in the Reporting Period
Station ID |
Average (µg/m3) |
Range (µg/m3) |
Action Level (µg/m3) |
Limit Level (µg/m3) |
M-A3 |
54 |
38-74 |
153 |
260 |
Table 3.3 Summary
of Construction Noise Monitoring Results in the Reporting Period
Station ID |
1Measured Noise Level, dB(A), Leq (30 mins) |
Action Level |
3Limit Level dB(A), Leq (30 mins) |
M-N3 |
68.5¡V 70.0 |
When one documented compliant is received |
For Schools: 70dB(A) during normal teaching period and 65 dB(A) during
examination periods |
Notes:
1. Free field noise levels were adjusted
with a correlation of +3 dB(A);
Table 4.1 Observations
and Recommendation of Site Inspection in the Reporting Period
Environmental Aspect |
Date |
Observations and Recommendations |
Follow-up Actions |
Air Quality |
Nil |
Nil |
Nil |
Noise |
Nil |
Nil |
Nil |
Water Quality |
3 March 2020 |
The Contractor
was reminded to wheel wash within the cut off drain area and provide sandbags
near the exit gate to avoid spillage outside site boundary. |
The item was
rectified by the Contractor on 10 Mar 2020. |
31 March 2020 |
The Contractor
was reminded to provide sandbags to prevent construction run off. -All drainage
facilities should be regularly inspected and maintained to ensure proper
operation. |
The item was
rectified by the Contractor on 31 Mar 2020. |
|
Waste Management |
Nil |
Nil |
Nil |
Landscape and
Visual |
3 Mar 2020 |
The tree
protection zone should be enhanced |
The item was
rectified by the Contractor on 10 Mar 2020. |
Permit/ Licenses |
Nil |
Nil |
Nil |
Table 6.1
Status of Required Submission under Environmental Permit
EP Condition |
Submission |
Submission Date |
3.4 |
Monthly EM&A Report (February 2020) |
13 March 2020 |
¡P
Formation of site haul road
leading to Chung Hau Street;
¡P
Drill and Blast excavation for
construction adit;
¡P
Mucking out from tunnel;
¡P
Construction of spoil basin;
¡P
Erection of blast doors at
construction adits;
¡P
Site installation and utilities
diversion;
¡P
Removal of oversize tree T143;
¡P
Trial grouting.
¡P
Mitigation measures in form of regular watering under a good site
practice should be adopted, particularly for the earthwork and breaking
activities;
¡P
Any excavated, stockpile of dusty material or load of dusty
materials on a vehicle leaving a construction site should be covered entirely
by impervious sheeting;
¡P
All construction plants / machineries should be checked / serviced
on a regular basis during the courses of construction to minimize the emission
of noise generation and eliminate dark smoke emission;
¡P
All C&D materials generated should be transported and stored at
temporary storage area. Suitable materials should be sorted for reuse on-site;
¡P
Wastewater generated from drilling shall be properly collected for
reuse or treated by wastewater treatment facilities before discharge;
¡P
Provision of drip trays for equipment likely cause spillage of
chemical / fuel, and provide routine maintenance;
¡P
Erecting temporary noise barrier for noisy Powered Mechanical
Equipment (PME) and deployment of Quality Powered Mechanical Equipment (QPME)
as many as practicable;
¡P
Mitigation measures recommended in the Landscape Mitigation Plan
shall be implemented for felling trees;
¡P
Conditions in the Environmental Permit and License should be
followed;
¡P
All recommended mitigation measures specified in the approved EIA
Report and EM&A Manual shall be implemented.
Air Quality
Impact
¡P
No specific observation was
identified in the reporting month.
Construction
Noise Impact
¡P
No specific observation was
identified in the reporting month.
Water
Quality Impact
¡P
The Contractor was reminded to
wheel wash within the cut off drain area and provide sandbags near the exit
gate area to avoid spillage outside site boundary.
¡P
The Contractor was reminded to
provide sandbags to prevent construction run off.
¡P
All drainage facilities should
be regularly inspected and maintained to ensure proper operation.
Waste
Management
¡P
No specific observation was
identified in the reporting month.
Landscape
and Visual Impact
¡P
The tree protection zone should
be enhanced.
Permit/
Licenses
¡P
No specific observation was
identified in the reporting month.