1.
Drainage Services Department (DSD) has awarded the contract for the
Design and Construction of Tsuen Wan Drainage Tunnel (hereafter referred to as
the “Project”) to Maeda-CREC-SELI Joint Venture (MCSJV). MCSJV has appointed Hyder Consulting
Limited (HCL) as the Environmental Team (ET) to undertake the Environmental
Monitoring and Audit (EM&A) works in accordance with the Environmental
Monitoring and Audit Manual (EM&A Manual) and Environmental Permit
(EP). Commencement of the
construction work had been notified to the Environmental Protection Department
(EPD) in January 2008. This
Monthly EM&A Report summarises the EM&A works undertaken in January
2009.
2.
According to the EM&A Manual, there are four designated air quality
monitoring locations, five designated noise monitoring locations and four water
quality monitoring locations during the construction phase: (i) Sik Sik Yuen Ho
Fung College (ASR 1, NSR 1 and Intake I-1); (ii) Hong Hoi Chee Hong Temple (ASR
3, NSR 3 and Intake I-2); (iii) Squatters (NSR 6 and Intake I-3); (iv) Beach
Tower (Long Beach Gardens) (ASR 8, NSR 8 and Outfall O-1); and (v) Greenview
Terrace (Block 1) (ASR 9, NSR 9 and Outfall O-1).
3.
During the non restricted hours, major construction activities
undertaken by the Contractor at TWDT included site clearance at I-1, I-2, I-3
and Outfall; hoarding & fencing erection at I-3 and Outfall; tree
transplanting at I-1, I-3 and Outfall; slope stabilization at Outfall; soil
nailing at I-3 and Outfall; pipe pile at I-1; mini pipe pile at I-2, relocation
of verified boulder at Outfall; formation of access road at Outfall, pre-bore
H-piling at I-3 and construction of air vent shaft at I-2.
4.
No exceedance has been recorded for air quality and noise monitoring during the reporting month.
Detail interpretation of the result could be referred
to Section 4.1 and 4.2 of this report.
5.
Exceedances for water quality monitoring are summarized in the following
table:
|
Parameter
|
Action Level Exceedance
|
Limit Level Exceedance
|
|
DO
|
Nil
|
Nil
|
|
Turbidity
|
Nil
|
Nil
|
|
SS
|
§
Two
recorded at I-2 and I-3 on 9 January
|
Nil
|
6.
These exceedances
were considered not to be
project-related as no direct disturbance was observed contributed by the
project construction activities. Detail interpretation could be referred to
Section 4.3 of this report.
7.
The status of waste generation in the reporting month are:
§
A total of 911.4 m3 C&D material was disposed of to
public fill at Tuen Mun and 515 m3 inert C&D materials were
reused in KDB 400, a line extension project of MTR Corportaion at Tai Kok Tsui;
§
About 20.1m3 general waste was disposed of to NENT Landfill;
§
Approximately 250 kg of paper/cardboard packaging was recycled;
§
No plastic waste was disposed of in the reporting month;
§
No chemical waste was disposed of in the reporting month; and
§
Approximately 5 kg of metal was generated in the reporting month.
8.
In this reporting month, two site inspections and one monthly site audit
were carried out by ET and Independent Environmental Checker (IEC)
respectively, to ensure proper implementation of environmental mitigation
measures specified in the EM&A Manual and compliance with environmental
legislation. All observations,
which were recorded on the inspection checklists, were passed to the Contractor
together with the ET’s recommendations.
9.
As advised by the Contractor and verified by ET:
§
No non-compliance was received in the reporting month;
§
No environmental complaint was received during the reporting month; and
§
No summons and prosecution was received in this reporting month.
10.
The major construction works for the upcoming three months will be:
§
Site clearance at I-1, I-2, I-3 and Outfall;
§
Hoarding & fencing erection at I-3;
§
Tree transplanting at I-1, I-3 and Outfall;
§
Slope stabilization at Outfall;
§
Soil nailing at Outfall;
§
Relocation of verified boulder at Outfall;
§
Formation of access road at Outfall;
§
Construction of air vent shaft at I-2;
§
Excavation and Lateral Support (ELS) at I-1;
§
Construction of skin wall at I-3
1.1.1
The Drainage Services Department (DSD) proposes to construct a tunnel
with an internal diameter of 6.5m and a length of 5.13km, with the purpose to
alleviate the flooding risk in Tsuen Wan and Kwai Chung.
1.1.2
This project is a Designated Project under Schedule 2 Part I Category Q, of the Environmental
Impact Assessment Ordinance (EIAO) as part of the proposed Tsuen Wan Drainage
Tunnel (TWDT) passes underneath the existing Tai Mo Shan Country Park. An Environmental Impact
Assessment (EIA) Study has therefore been undertaken to provide information on
the nature and extent of environmental impacts arising from the construction
and operation of the proposed designed project and related activities taking
place concurrently. From the EIA
the recommendations for monitoring contained herein, are made.
1.1.3
The Maeda
- CREC - SELI Joint Venture (MCSJV) was awarded by DSD with
the Contract – Design and Construction of Tsuen Wan Drainage Tunnel.
1.1.4
Hyder was commissioned by the MCSJV as the Environmental Team (ET) to
implement an EM&A program in accordance with the EM&A Manual. The proposed tunnel section flows from
the junction of Shing Mun Road and Wo Yi Hop Road and discharges to south of
Yau Kom Tau underneath Castle Peak Road as shown in Appendix A.
1.1.5
The construction works of the Project was commenced in January 2008. This is
the tenth monthly EM&A report summarising the impact monitoring results and
audit findings of the EM&A program in January 2009.
2.1
Project Organization and
Management Structure
2.1.1
The organization chart and lines of communication with respect to the
on-site environmental management are shown in Appendix B.
2.2
Construction Progress
2.2.1
The overall project programme from the detail design to completion of
all civil works shall take approximately 54 months. The construction programme is presented
in Appendix C.
2.2.2
The major construction activities undertaken in the
reporting month were:
§
Site clearance at I-1, I-2, I-3 and Outfall;
§
Hoarding & fencing erection at I-3 and Outfall;
§
Tree transplanting at I-1, I-3 and Outfall;
§
Slope stabilization at Outfall;
§
Soil nailing at Outfall;
§
Pipe pile at I-1;
§
Mini pipe pile at I-2,
§
Relocation of verified boulder at Outfall;
§
Formation of access road at Outfall,
§
Pre-bore H-piling at I-3; and
§
Construction of air vent shaft at I-2.
2.2.3
No construction activities were undertaken for TWDT during the
restricted hours.
2.3
Mitigation Measures
2.3.1
The implemented environmental mitigation measures and their statuses are
given in Appendix D.
2.4
Status of License and
Permit
2.4.1
A summary of relevant permits and licences for the Project is given in
Appendix E.
3
Summary of EM&A
Requirement
3.1
Air Quality
3.1.1
1-hour Total Suspended Particulates (TSP) levels are measured at the
designated air monitoring locations in accordance with the EM&A
Manual. Information such as date
of monitoring, duration, weather condition, equipment used and monitoring
results were recorded on the field data sheet developed for the Project. The monitoring results are presented in
Section 4.
3.1.2
1-hour TSP monitoring is carried out under typical weather conditions
(with no adverse weather such as typhoon signal or rain storm warning) three
times every six days using High Volume Air Samplers (HVASs). Monitoring should be conducted in
accordance with the standard sampling method as set out in High Volume Method
for Total Suspended Particulates, Part 50 Chapter 1 Appendix B, Title 40 of the
Code of Federal Regulations of the USEPA.
3.1.3
After each sampling, the filter paper loaded with dust is kept in a
clean and tightly sealed plastic bag. The filter paper is then re-conditioned
in desiccators for 24 hours before obtaining the weight under laboratory
conditions.
3.1.4
The average concentrations of the TSP are calculated based on the
following information obtained from monitoring:
·
Flow rate;
·
Weight of the filter paper before and after
sampling; and
·
Sampling period indicated by the elapsed-time
meter.
3.1.5
All samples should be kept in good condition (i.e. stored in sealed
plastic bags, with brief description of the monitoring dates and locations) for
a period of 6 months before disposal. Sample analysis is carried out by ALS Technichem (HK) Pty
Limited (HOKLAS Registration Number 066).
3.1.6
High Volume Air Samplers (HVASs) are used for 1-hour TSP monitoring to
comply with the USEPA specifications in Appendix B Part 5 - Reference Method
for the Determination of Suspended Particulate matter in the Atmosphere
(High-Volume Method) of the Code of Federal Regulation dated June 1, 1991.
3.1.7
All HVASs are calibrated before commencement of monitoring using
standard orifice 5-points calibration method with orifice calibrator to
determine the actual flow rate of each HVAS. This shall be used for the calculation of the TSP level. Calibration Kit Model - TE5025A is used for calibration of the HVAS. Recalibration of the HVAS shall be carried out after motor
maintenance, at least once every six months, which is about the expected life
of carbon brush. The air quality monitoring equipment used during the reporting
month is shown in Table
3‑1 below.
The calibration certificates are included in Appendix F.
|
Equipment Type
|
Model
|
Serial Number
|
Calibration Orifice Number
|
Location
|
|
HVAS
|
BM2000HX
|
4994
|
517N
|
ASR 1
|
|
HVAS
|
BM2000HX
|
5875
|
517N
|
ASR 3
|
|
HVAS
|
TE5005X
|
0390
|
517N
|
ASR 8
|
|
HVAS
|
TE5005X
|
0646
|
517N
|
ASR 9
|
Table 3‑1 Air
Quality Monitoring Equipment
3.1.8
Four designated air quality-monitoring locations were identified in the
contract specific EM&A manual.
They are listed in Table
3‑2 below and shown in Appendix G.
|
Monitoring Station ID
|
|
|
|
ASR1
|
Sik Sik
Yuen Ho Fung College
|
G/F
|
|
ASR3
|
Hong Hoi
Chee Hong Temple
|
Podium
|
|
ASR8
|
Beach Tower
(Long Beach Gardens)
|
G/F
|
|
ASR9
|
Greenview
Terrace (Block 1)
|
G/F
|
Table 3‑2 Air
Quality Monitoring Locations
Action and Limit Levels
3.1.9
The Action and Limit Levels for the 1-hour TSP monitoring is shown in Table 3‑3. In case
exceedances of Action and/or Limit levels for air quality occur, Event
Contingency Plans (ECPs) would be implemented. The ECPs for Action and Limit levels exceedances are shown
in Table
3‑4.
|
Station
|
1-hr TSP Level in μg/m3
|
|
Action Level
|
Limit Level
|
|
ASR 1
|
307
|
500
|
|
ASR 3
|
327
|
500
|
|
ASR 8
|
337
|
500
|
|
ASR 9
|
329
|
500
|
Table 3‑3 Action
& Limit Levels for Air Quality
|
EVENT
|
ACTION
|
|
ET
|
IEC
|
SOR
|
CONTRACTOR
|
|
ACTION LEVEL
|
|
Exceedance for one sample
|
·
Identify source,
investigate the causes of exceedance and propose remedial measures;
·
Inform IEC and SOR;
·
Repeat measurement to
confirm finding;
·
Increase monitoring frequency
to daily.
|
·
Check monitoring data
submitted by ET;
·
Check Contractor’s working
method.
|
·
Notify Contractor.
|
·
Rectify any unacceptable
practice;
·
Amend working methods if
appropriate.
|
|
Exceedance for two or more consecutive samples
|
·
Identify source;
·
Inform IEC and SOR;
·
Advise SOR on the
effectiveness of the proposed remedial measures;
·
Repeat measurements to
confirm findings;
·
Increase monitoring
frequency to daily;
·
Discuss with IEC and
Contractor on remedial actions required;
·
If exceedance continues,
arrange meeting with IEC and SOR;
·
If exceedance stops, cease
additional monitoring.
|
·
Check monitoring data
submitted by ET;
·
Check Contractor’s working
method;
·
Discuss with ET and
Contractor on possible remedial measures;
·
Advise the ET on the
effectiveness of the proposed remedial measures;
·
Supervise Implementation of
remedial measures.
|
·
Confirm receipt of
notification of exceedance in writing;
·
Notify Contractor;
·
Ensure remedial measures
properly implemented.
|
·
Submit proposals for
remedial to SOR within 3 working days of notification;
·
Implement the agreed
proposals;
·
Amend proposal if
appropriate.
|
|
LIMIT LEVEL
|
|
Exceedance for one sample
|
·
Identify source,
investigate the causes of exceedance and propose remedial measures;
·
Inform IEC, SOR, Contractor
and EPD;
·
Repeat measurement to
confirm finding;
·
Increase monitoring
frequency to daily;
·
Assess effectiveness of
Contractor’s remedial actions and keep IEC, EPD and SOR informed of the
results.
|
·
Check monitoring data
submitted by ET;
·
Check Contractor’s working
method;
·
Discuss with ET and
Contractor on possible remedial measures;
·
Advise SOR on the
effectiveness of the proposed remedial measures;
·
Supervise implementation of
remedial measures.
|
·
Confirm receipt of
notification of exceedance in writing;
·
Notify Contractor;
·
Ensure remedial measures
properly implemented.
|
·
Take immediate action to
avoid further exceedance;
·
Submit proposals for
remedial actions to IEC within 3 working days of notification;
·
Implement the agreed
proposals;
·
Amend proposal if appropriate.
|
|
Exceedance for two or more consecutive samples
|
·
Notify IEC, SOR, Contractor
and EPD;
·
Identify source;
·
Repeat measurement to
confirm findings;
·
Increase monitoring
frequency to daily;
·
Carry out analysis of
Contractor’s working procedures to determine possible mitigation to be
implemented;
·
Arrange meeting with IEC
and SOR to discuss the remedial actions to be taken;
·
Assess effectiveness of
Contractor’s remedial actions and keep IEC, EPD and SOR informed of the
results;
·
If exceedance stops, cease
additional monitoring.
|
·
Discuss amongst SOR, ET,
and Contractor on the potential remedial actions;
·
Review Contractor’s
remedial actions whenever necessary to assure their effectiveness and advise
SOR accordingly;
·
Supervise the
implementation of remedial measures.
|
·
Confirm receipt of
notification of exceedance in writing;
·
Notify Contractor;
·
In consultation with the
IEC, agree with the Contractor on the remedial measures to be implemented;
·
Ensure remedial measures
properly implemented;
·
If exceedance continues,
consider what portion of the work is responsible and instruct the Contractor
to stop that portion of work until the exceedance is abated.
|
·
Take immediate action to
avoid further exceedance;
·
Submit proposals for
remedial actions to IEC within 3 working days of notification;
·
Implement the agreed
proposals;
·
Resubmit proposals if
problem still not under control;
·
Stop the relevant portion
of works as determined by SOR until the exceedance is abated.
|
Table 3‑4 Event/Action
Plan for Air Quality
3.2
Noise
3.2.1
The construction
noise level is measured in terms of equivalent A-weighted sound pressure level
(Leq) measured in decibels (dB(A)). Monitoring of Leq(30 min) is carried out at the
noise monitoring locations on a weekly basis during normal construction working
hours (0700-1900 hours from Monday to Saturday except public holidays). For all other time periods (i.e.
restricted hours), Leq(5 min) would be employed for comparison with
the Noise Control Ordinance (NCO) criteria if necessary.
3.2.2
The two statistical
sound levels L10 and L90: the level exceeded for 10 and
90 percent of the time respectively, are also recorded during monitoring. Major noise sources observed, both
on-site and off-site, are recorded on the field data sheet. All measurements are recorded to the
nearest 0.1 dB(A) and presented in round numbers in this report. Results are presented in Section 4.
3.2.3
Sound level meters,
which comply with the International Electrotechnical Commission Publication
651: 1979 (Type 1) and 804: 1985 (Type 1) specifications as referred to the
Technical Memorandum (TM) issued under the Noise Control Ordinance, are
used. Noise levels for the
A-weighted levels Leq(30min), L10 and L90 are
measured throughout the impact monitoring. Average, by sound power, of six consecutive 5 minutes
readings is used to provide Leq(30 min) for non-restricted hours
(07:00-19:00 hours from Monday to Saturday except public holidays). A facade correction of 3dB(A) is
applied to the measurements that are carried out under free field conditions.
3.2.4
During the impact
monitoring, parameters such as dates, weather condition, equipment used,
measurement results and major noise sources are recorded on the field data
record sheet. Monitoring would not
be carried out in the presence of fog, rain or strong wind with a steady speed
exceeding 5 m/s. In relation to
the monitored noise levels, other noise sources such as road traffic might make
a significant contribution to the overall noise environment. Therefore, noise monitoring activities
would take into account such influencing factors, which were not present during
the baseline monitoring period.
Monitoring Equipment and Calibration
3.2.5
Bruel & Kjaer
(B&K) Precision Integrating Sound Level Meters of Type 2238 in compliance
with the International Electrotechnical Commission Publication 651: 1979 (Type
1) and 804: 1985 (Type 1) Specifications, stated in the Technical Memorandum
(TM) issued under the NCO, are used for noise monitoring.
3.2.6
Prior to and
following each noise measurement, the accuracy of the sound level meter is
checked using an acoustic calibrator (B&K Type 4230, (S/N 1639065)
generating a known sound pressure level at a known frequency. Measurements are considered as valid
only if the calibration levels from before and after the noise measurement
agrees to within 1.0 dB(A). The
sound level meters and the calibrator are calibrated annually to ensure they
perform to the same level of accuracy as stated in the manufacturer’s
specifications. The noise
monitoring equipment used during the reporting month is shown in Table 3‑5 below.
The calibration certificates are included in Appendix F.
|
Equipment Type
|
Manufacturer
|
Type Number
|
Serial Number
|
Location
|
|
Sound Level Meter
|
Bruel & Kjaer
|
2238
|
2448529
|
NSR1, NSR3, NSR6, NSR8 and NSR9
|
|
Sound Level Calibrator
|
Bruel & Kjaer
|
4230
|
1639065
|
NSR1, NSR3, NSR6, NSR8 and NSR9
|
Table 3‑5 Noise
Monitoring Equipment
3.2.7
Five designated
noise monitoring locations were identified in the contract specific EM&A
manual. They are listed in Table 3‑6 below and shown in Appendix G.
|
Monitoring Station ID
|
Name of Premises
|
Floor Level
|
|
NSR1
|
Sik Sik Yuen Ho Fung College
|
G/F
|
|
NSR3
|
Hong Hoi Chee Hong Temple
|
Podium
|
|
NSR6
|
Squatters
|
G/F
|
|
NSR8
|
Beach Tower (Long Beach Gardens)
|
G/F
|
|
NSR9
|
Greenview Terrace (Block 1)
|
G/F
|
Table 3‑6 Noise
Monitoring Locations
3.2.8
Prediction of
construction groundborne noise indicates the criteria will be achieved at most
NSRs except exceedances are predicted at Hong Hoi Chee Hong Temple (NSR3) and
Squatters (NSR6). It is
recommended to restrict the TBM operation in non-restricted period (i.e. 0700 -
1900) at these NSRs. In order to
ensure proper control of groundborne noise is executed by the contractor, a
monitoring requirement is recommended at the Hong Hoi Chee Hong Temple at
Intake 2 and Squatters at Intake 3 for compliance checking. According to the monitoring schedule,
TBM operation will be carried out for about 3 months in the vicinity of Hong
Hoi Chee Hong Temple at Intake 2 and Squatters at Intake 3. If groundborne noise criterion is
exceeded, the monitoring shall continue daily until acceptance has been
restored against the criterion.
Otherwise the monitoring can be discontinued.
3.2.9
The criteria
including Technical Memorandum for the Assessment of Noise from Places other
than Domestic Premises, Public Places or Construction Sites (TM-Places) under
the NCO stipulates that noise transmitted primarily through the structural
elements of building, or buildings, shall be 10 dB(A) less than the relevant
ANLs. Daytime groundborne
construction noise criterion of 60 dB(A) therefore applies with reference to
TM-EIAO 70 dB(A) criterion for schools and taking account of the minus 10 dB(A)
requirement under the NCO TM-Places.
Following the same principle for groundborne noise criteria, groundborne
construction noise levels inside domestic premises relying on opened window for
ventilation will be limited to 65 dB(A), with reference to the daytime airborne
noise criterion of 75 dB(A) in accordance with TM-EIAO.
3.2.10
The Action and
Limit levels for construction noise are defined in Table 3‑7. If
non-compliance of the criteria occurs, actions in accordance with the Action
Plan in Table
3‑8 would be carried out.
|
Time Period
|
Action
|
Limit
|
|
0700 – 1900 hrs on normal weekdays
|
When one documented complaint is
received
|
75 dB(A)*
|
* For
educational establishments the limit level shall be 70dB(A) and reduced to 65dB(A)
during examination periods between 0700-1900 hrs on normal weekdays.
Table 3‑7 Action
& Limit Levels for Noise
|
Event
|
Action
|
|
ET Leader
|
IEC
|
SOR
|
Contractor
|
|
Action Level
|
1.
Notify IEC and the Contractor.
2.
Carry out investigation.
3.
Report the results of investigation to IEC and the Contractor.
4.
Discuss with the Contractor and formulate remedial measures.
5.
Increase monitoring frequency to check mitigation measures.
|
1.
Review with analysed results submitted by ET.
2.
Review the proposed remedial measures by the Contractor and
advise SOR accordingly.
3.
Supervise the implement of remedial measures.
|
1.
Confirm receipt of notification of exceedance in writing.
2.
Notify the Contractor.
3.
Require the Contractor to propose remedial measures for the
analysed noise problem.
4.
Ensure remedial measures are properly implemented.
|
1.
Submit noise mitigation proposals to IEC.
2.
Implement noise mitigation proposals.
|
|
Limit Level
|
1.
Identify the source.
2.
Notify IEC, SOR, EPD and the Contractor.
3.
Repeat measurement to confirm findings.
4.
Increase monitoring frequency.
5.
Carry out analysis of Contractor’s working procedures to
determine possible mitigation to be implemented.
6.
Inform IEC, SOR, and EPD the causes & actions taken for the
exceedances.
7.
Assess effectiveness of the Contractor’s remedial actions and
keep IEC, EPD and SOR informed of the results.
8.
If exceedance stops, cease additional monitoring.
|
1.
Discuss amongst SOR, ET Leader and the Contractor on the
potential remedial actions.
2.
Review the Contractor’s remedial actions whenever necessary to
assure their effectiveness and advise SOR accordingly.
3.
Supervise the implementation of remedial measures.
|
1.
Confirm receipt of notification of exceedance in writing.
2.
Notify the Contractor.
3.
Require the Contractor to propose remedial measures for the
analysed noise problem.
4.
Ensure remedial measures are properly implemented.
5.
If exceedance continues, consider what activity of the work is
responsible and instruct the Contractor to stop that activity of work until
the exceedance is abated.
|
1.
Take immediate action to avoid further exceedance.
2.
Submit proposals for remedial actions to IEC within 3 working
days of notification.
3.
Implement the agreed proposals.
4.
Resubmit proposals if problem still not under control.
5.
Stop the relevant activity of works as determined by the SOR
until the exceedance is abated.
|
Table 3‑8 Event/Action
Plan for Noise
3.3
Water Quality
3.3.1
As there is no dredging or reclamation required for the project, the
water quality impact would be insignificant with the protection measures
recommended in Section 5.6 of the EIA report. However in view of the sensitive nature of the
rivers/streams and bathing beaches in the Study Area, it
is suggested that a programme of monitoring should be established to confirm
the mitigation measures are protecting these water bodies.
Water Quality Parameters
3.3.2
Monitoring for Dissolved
Oxygen (DO), temperature, turbidity, pH and suspended solids (SS) should be
undertaken at designated monitoring locations. It should be noted that DO, temperature, turbidity and pH
should be measured in-situ whereas SS is assayed in a laboratory.
3.3.3
In association with the water
quality parameters, other relevant data should also be measured, such as
monitoring location/position, time, weather conditions, and any special phenomena and description of work underway at the construction site
etc.
3.3.4
In accordance with the EM&A Manual, the water quality monitoring for all specified
parameters shall be measured at all designated monitoring locations including
control points at an interval of 3 days per week. DO, temperature,
turbidity, pH and SS shall be undertaken at designated monitoring locations.
3.3.5
It should be
noted that water samples for all monitoring parameters should be
collected, stored, preserved and analysis according to Standard Methods, APHA
17 ed. and/or methods agreed by the Director of Environmental Protection.
3.3.6
Each sample shall be analysed in accordance with the APHA Standard
Methods for the Examination of Water and Wastewater, 18th edition, or an
equivalent method approved by the EPD.
If an in-house or non-standard method is proposed, details of the method
verification may require to be submitted to the EPD. In any circumstance, the sample testing should comply with a
comprehensive quality assurance and quality control programme. The laboratory should be prepared to
demonstrate the quality programmes to the EPD when requested.
Monitoring Equipment and
Calibration
3.3.7
All the water samples
collected should be transferred to clearly labelled and pre-cleaned sample containers with necessary
preservatives immediately after collection. The sample containers should be provided by a HOKLAS
accredited laboratory. Sufficient
quantity of samples should be collected for all laboratory analyses. Following sampling, samples should be stored in a cool box at temperature of
between 0 and 4oC, and transported to the laboratory within the
sample retention time as advised by the laboratory under proper chain-of-custody
system. The water quality monitoring equipment
used during the reporting month is shown in Table
3‑9 below.
|
Equipment Type
|
Manufacturer
|
Model
|
Quantity
|
|
DO /
Temperature Meter
|
YSI
|
YSI85
|
1
|
|
pH Meter
|
WTW
|
PH/Oxi 340i
|
1
|
|
Tuibidimeter
|
EUTECH
|
TN-100
|
1
|
Table 3‑9 Water
Quality Monitoring Equipment
3.3.8
All pH meters, DO meters and turbidimeters shall be checked and
calibrated prior to use. DO meters
and turbidimeters shall be calibrated by a laboratory accredited under HOKLAS
or any other international accreditation scheme, and subsequently re-calibrated
at 3 monthly intervals throughout all stages of the water quality
monitoring. Responses of sensors
and electrodes shall be checked with certified standard solutions before each
use. Wet bulb calibrations for all
DO meters shall be carried out before measurement at each monitoring location. For the on site calibration of field
equipment, BS 127:1993, "Guide to field and on-site test methods for the
analysis of waters" should be observed. The calibration certificates are included in Appendix
F.
3.3.9
Four
designated monitoring locations were identified in the contract specific EM&A Manual for water quality monitoring. While the construction of the outfall does
not require dredging or reclamation, monitoring of water quality is only
required during which the rip rap is placed. These four monitoring stations are listed
in Table 3‑10 below and shown in Appendix G.
|
Monitoring Station ID
|
Name of Premises
|
|
I-1
|
Intake I-1
|
|
I-1-C
|
Control of Intake I-1
|
|
I-2
|
Intake I-2
|
|
I-2-C
|
Control of Intake I-2
|
|
I-3
|
Intake I-3
|
|
I-3-C
|
Control of Intake I-3
|
|
O-1 (FT)
|
Outfall 1During Flood Tide
|
|
O-1 (ET)
|
Outfall 1During Ebb Tide
|
|
O-1-C (FT)
|
Control of Outfall O-1 During Flood
Tide
|
|
O-1-C (ET)
|
Control of Outfall O-1 During Ebb
Tide
|
Table 3‑10 Water
Quality Monitoring Locations
3.3.10
Note that there are two control stations for
Outfall O-1, one for sampling during flood tide and one for sampling during ebb
tide. Only one of those control
stations for Outfall O-1 shall be sampled during each sampling. Control station to be sampled will be
determined based on the tidal information provided by the Hong Kong
Observatory.
3.3.11
The Action and
Limit levels for water quality monitoring parameters are defined in Table 3‑11. In case of any exceedance, appropriate
actions will be undertaken in accordance with the Event and Action Plan as
described in Table
3‑12.
|
Parameters
|
Action
|
Limit
|
|
DO in mg/l
(Surface, Middle & Bottom)
|
Surface & Middle
5%-ile of baseline data for surface
and middle layer.
Bottom
5%-ile of baseline data for bottom
layer.
|
Surface & Middle
4mg/l except 5mg/l for FCZ or
1%-ile of baseline data for surface
and middle layer
Bottom
2mg/l or 1%-ile of baseline data for
bottom layer
|
|
SS in mg/l
(depth-averaged)
|
95%-ile of baseline data or 120% of upstream control station’s SS at
the same tide of the same day
|
99%-ile of baseline or 130% of upstream control station’s SS at the
same tide of the same day and specific sensitive receiver water quality
requirements (e.g. required suspended solids levels for concerned sea water
intakes)
|
|
Turbidity (Tby) in NTU (depth-averaged)
|
95%-ile of baseline data or 120% of upstream control station’s Tby at
the same tide of the same day
|
99%-ile of baseline or 130% of upstream control station’s Tby at the
same tide of the same day
|
Notes:
·
For DO, non-compliance of
the water quality limits occurs when monitoring result is lower than the
limits.
·
For SS and Tby,
non-compliance of the water quality limits occurs when monitoring result is
higher than the limits.
·
All the figures given in
the table are used for reference only and the EPD may amend the figures
whenever it is considered as necessary.
Table 3‑11 Action/Limit
Levels for Water Quality
|
Event
|
ET
Leader
|
IEC
|
SOR
|
Contractor
|
|
Action Level being exceeded by one sampling day
|
1. Repeat
in-situ measurement to confirm finding;
2. Identify
source(s) of impact;
3. Inform
IEC and Contractor;
4. Check
monitoring data, all plant, equipment and Contractor’s working methods;
5. Discuss
mitigation measures with IEC and Contractor; and
6. Repeat
measurement on next day of exceedance.
|
1. Discuss
with ET and Contractor on the mitigation measures;
2. Review
proposals on mitigation measures submitted by Contractor and advise the SOR
accordingly; and
3. Assess
the effectiveness of the implemented mitigation measures.
|
1. Discuss
with IEC on the proposed mitigation measures; and
2. Make
agreement on the mitigation measures to be implemented.
|
1. Inform
the SOR and confirm notification of the non-compliance in writing;
2. Rectify
unacceptable practice;
3. Check
all plant and equipment;
4. Consider
changes of working methods;
5. Discuss
with ET and IEC and propose mitigation measures to IEC and SOR; and
6. Implement
the agreed mitigation measures.
|
|
Action Level being exceeded by more than one consecutive sampling day
|
1. Repeat
in-situ measurement to confirm finding;
2. Identify
source(s) of impact;
3. Inform
IEC and Contractor;
4. Check
monitoring data, all plant, equipment and Contractor’s working methods;
5. Discuss
mitigation measures with IEC and Contractor;
6. Ensure
mitigation measures are implemented;
7. Prepare
to increase the monitoring frequency to daily; and
8. Repeat
measurement on next day of exceedance.
|
1. Discuss
with ET and Contractor on the mitigation measures;
2. Review
proposals on mitigation measures submitted by Contractor and advise the SOR
accordingly; and
3. Assess
the effectiveness of the implemented mitigation measures.
|
1. Discuss
with IEC on the proposed mitigation measures;
2. Make
agreement on the mitigation measures to be implemented; and
3. Assess
the effectiveness of the implemented mitigation measures.
|
1. Inform
the Engineer and confirm notification of the non-compliance in writing;
2. Rectify
unacceptable practice;
3. Check
all plant and equipment;
4. Consider
changes of working methods;
5. Discuss
with ET and IEC and propose mitigation measures to IEC and SOR within 3
working days; and
6. Implement
the agreed mitigation measures.
|
|
Limit Level being exceeded by one
sampling day
|
1. Repeat
in-situ measurement to confirm finding;
2. Identify
source(s) of impact;
3. Inform
IEC, Contractor and EPD;
4. Check
monitoring data, all plant, equipment and Contractor’s working methods;
5. Discuss
mitigation measures with IEC, SOR and Contractor;
6. Ensure
mitigation measures are implemented; and
7. Increase
the monitoring frequency to daily until no exceedance of Limit level.
|
1. Discuss
with ET and Contractor on the mitigation measures;
2. Review
proposals on mitigation measures submitted by Contractor and advise the SOR
accordingly; and
3. Assess
the effectiveness of the implemented mitigation measures.
|
1. Discuss
with IEC, ET and Contractor on the proposed mitigation measures; and
2. Request
Contractor to critically review the working methods;
3. Make
agreement on the mitigation measures to be implemented; and
4. Assess
the effectiveness of the implemented mitigation measures.
|
1. Inform
the Engineer and confirm notification of the non-compliance in writing;
2. Rectify
unacceptable practice;
3. Check
all plant and equipment;
4. Consider
changes of working methods;
5. Discuss
with ET and IEC and SOR and propose mitigation measures to IEC and SOR within
3 working days; and
6. Implement
the agreed mitigation measures.
|
|
Limit Level being exceeded by more
than one consecutive sampling day
|
1. Repeat
in-situ measurement to confirm finding;
2. Identify
source(s) of impact;
3. Inform
IEC, Contractor and EPD;
4. Check
monitoring data, all plant, equipment and Contractor’s working methods;
5. Discuss
mitigation measures with IEC, SOR and Contractor;
6. Ensure
mitigation measures are implemented; and
7. Increase
the monitoring frequency to daily until no exceedance of Limit level for two
consecutive days.
|
1. Discuss
with ET and Contractor on the mitigation measures;
2. Review
proposals on mitigation measures submitted by Contractor and advise the SOR
accordingly; and
3. Assess
the effectiveness of the implemented mitigation measures.
|
1. Discuss
with IEC, ET and Contractor on the proposed mitigation measures; and
2. Request
Contractor to critically review the working methods;
3. Make
agreement on the mitigation measures to be implemented;
4. Assess
the effectiveness of the implemented mitigation measures; and
5. Consider
and instruct, if necessary, the Contractor to slow down or to stop all or
part of the marine work until no exceedance of Limit Level.
|
1. Inform
the SOR and confirm notification of the non-compliance in writing;
2. Rectify
unacceptable practice;
3. Check
all plant and equipment;
4. Consider
changes of working methods;
5. Discuss
with ET and IEC and SOR and propose mitigation measures to IEC and SOR within
3 working days;
6. Implement
the agreed mitigation measures; and
7. As
directed by the Engineer, to slow down or to stop all or part of the marine
work or construction activities.
|
Table
3‑12 Event/Action
Plan for Water Quality
4.1
Air Quality
4.1.1
The air quality monitoring schedule of the reporting period is given in
Appendix H.
4.1.2
Results of 1-hours
TSP level are shown in Table
4‑1. All
measurements were recorded to the nearest 0.1mg/m3 and presented in round numbers in this
report. Detail results including
weather conditions, and graphical presentations are presented in Appendix I.
|
Station
|
Monitoring Date
|
Monitoring Result (mg/m3)
|
Action/Limit Levels (mg/m3)
|
|
ASR 1
|
3-Jan-09
|
58.9
|
307/500
|
|
82.2
|
|
76.0
|
|
9-Jan-09
|
144.7
|
|
84.6
|
|
144.7
|
|
15-Jan-09
|
123.9
|
|
84.6
|
|
89.5
|
|
21-Jan-09
|
69.9
|
|
121.4
|
|
84.6
|
|
24-Jan-09
|
55.2
|
|
69.9
|
|
77.3
|
|
29-Jan-09
|
73.6
|
|
101.8
|
|
141.0
|
|
ASR 3
|
3-Jan-09
|
60.9
|
327/500
|
|
84.8
|
|
63.3
|
|
9-Jan-09
|
72.2
|
|
168.6
|
|
121.9
|
|
15-Jan-09
|
64.5
|
|
77.7
|
|
84.8
|
|
21-Jan-09
|
77.7
|
|
57.4
|
|
63.3
|
|
24-Jan-09
|
76.5
|
|
74.1
|
|
83.7
|
|
29-Jan-09
|
44.2
|
|
76.5
|
|
98.0
|
|
ASR 8
|
3-Jan-09
|
63.5
|
337/500
|
|
86.7
|
|
85.5
|
|
9-Jan-09
|
166.0
|
|
97.7
|
|
152.6
|
|
15-Jan-09
|
168.5
|
|
161.2
|
|
156.3
|
|
21-Jan-09
|
106.2
|
|
105.0
|
|
120.9
|
|
24-Jan-09
|
119.6
|
|
92.8
|
|
107.4
|
|
29-Jan-09
|
114.8
|
|
112.3
|
|
125.8
|
|
ASR 9
|
3-Jan-09
|
55.5
|
329/500
|
|
56.8
|
|
63.4
|
|
9-Jan-09
|
114.9
|
|
63.4
|
|
105.7
|
|
15-Jan-09
|
113.6
|
|
103.1
|
|
108.3
|
|
21-Jan-09
|
67.4
|
|
59.5
|
|
71.3
|
|
24-Jan-09
|
79.3
|
|
68.7
|
|
81.9
|
|
29-Jan-09
|
103.1
|
|
111.0
|
|
114.9
|
Note: Italic indicates the occurrence of
exceedance of Action level
Bold indicates the occurrence of exceedance of Limit Level
Table 4‑1 Air Quality Monitoring Results
4.1.3
No project related
exceedance was recorded in the reporting month.
4.2
Noise
The noise monitoring schedule of the reporting period
is given in Appendix H. Results of
measured noise level, in terms of Leq (30min), during the construction are
shown in Table 4‑2. All measurements including L10 and L90 are recorded
to the nearest 0.1 dB(A) and presented in round numbers in this report. Detail results including weather
conditions and graphical presentation are presented in Appendix I.
|
Station
|
Monitoring Date
|
Leq (30 min) dB(A)
|
Limit Levels dB(A)
|
|
NSR 1
|
9-Jan-09
|
62
|
70
|
|
16-Jan-09
|
63
|
|
21-Jan-09
|
65
|
|
29-Jan-09
|
63
|
|
NSR 3
|
9-Jan-09
|
71
|
75
|
|
16-Jan-09
|
71
|
|
21-Jan-09
|
66
|
|
29-Jan-09
|
60
|
|
NSR 6
|
9-Jan-09
|
64
|
|
16-Jan-09
|
64
|
|
21-Jan-09
|
66
|
|
29-Jan-09
|
60
|
|
NSR 8
|
9-Jan-09
|
64
|
|
16-Jan-09
|
65
|
|
21-Jan-09
|
65
|
|
29-Jan-09
|
59
|
|
NSR 9
|
9-Jan-09
|
61
|
|
16-Jan-09
|
67
|
|
21-Jan-09
|
66
|
|
29-Jan-09
|
52
|
Table 4‑2 Noise
Monitoring Results
4.2.1
No exceedances of
Action / Limit Level were recorded during the reporting month.
4.3
Water Quality Monitoring
4.3.1
The water quality
monitoring schedule of the reporting period is given in Appendix H. In accordance with the monitoring
results, two exceedances were identified. Summaries of exceedances for water
quality monitoring are provided in Tables 4-3 to 4-5.
|
Parameter
|
Action
Level Exceedance
|
Limit
Level Exceedance
|
|
DO
|
Nil
|
Nil
|
|
Turbidity
|
Nil
|
Nil
|
|
SS
|
Nil
|
Nil
|
|
Total
|
Nil
|
Nil
|
Table 4‑3 Summary
of Exceedances for I-1
|
Parameter
|
Action
Level Exceedance
|
Limit
Level Exceedance
|
|
DO
|
Nil
|
Nil
|
|
Turbidity
|
Nil
|
Nil
|
|
SS
|
One recorded on 9 January
|
Nil
|
|
Total
|
One
|
Nil
|
Table 4‑4 Summary
of Exceedances for I-2
|
Parameter
|
Action
Level Exceedance
|
Limit
Level Exceedance
|
|
DO
|
Nil
|
Nil
|
|
Turbidity
|
Nil
|
Nil
|
|
SS
|
One recorded on 9 January
|
Nil
|
|
Total
|
One
|
Nil
|
Table 4‑5 Summary
of Exceedances for I-3
4.3.2
Results of measured
water quality parameters during the reporting month are shown in Table 4‑6 and detailed results including weather conditions and
graphical presentations are enclosed in Appendix I.
4.3.3
The exceedances of
Control Action Level of SS (120% higher than I-2-C and I-3-C respectively)
recorded at I-2 and I-3 on 9 January were below both baseline Action and Limit
Levels and was within the range of baseline SS concentration. No direct
disturbance was observed contributed from project related activities. The
exceedance considered to be contributed by natural variation and no action was
therefore required.
4.3.4
Details of the
above mentioned investigations could be referred to the notifications of
exceedances as enclosed in Appendix J, which have been provided to the IEC for
review.
|
Station
|
Date
|
Temperature
|
DO (mg/L)
|
Action/Limit Level for DO (mg/L)
|
pH
|
Turbidity (NTU)
|
Action/Limit Level for Turbidity (NTU)
|
SS (mg/L)
|
Action/Limit
Level for SS (mg/L)
|
|
I-1
|
2-Jan-09
|
18.50
|
4.76
|
3.42 / 3.34
|
7.77
|
4.17
|
9.75 / 12.47
|
2.0
|
8.85 / 10.17
|
|
|
5-Jan-09
|
18.20
|
4.87
|
|
7.22
|
3.72
|
|
2.0
|
|
|
|
7-Jan-09
|
18.30
|
4.43
|
|
7.75
|
4.20
|
|
2.0
|
|
|
|
9-Jan-09
|
18.15
|
4.25
|
|
7.76
|
4.02
|
|
4.1
|
|
|
|
12-Jan-09
|
15.25
|
5.74
|
|
7.55
|
5.43
|
|
2.0
|
|
|
|
14-Jan-09
|
18.50
|
4.83
|
|
7.54
|
4.65
|
|
4.1
|
|
|
|
16-Jan-09
|
15.40
|
5.32
|
|
7.43
|
5.09
|
|
2.0
|
|
|
|
19-Jan-09
|
17.80
|
4.53
|
|
7.74
|
5.21
|
|
2.0
|
|
|
|
21-Jan-09
|
17.50
|
5.87
|
|
7.52
|
4.23
|
|
2.0
|
|
|
|
23-Jan-09
|
16.50
|
5.55
|
|
7.71
|
5.15
|
|
2.0
|
|
|
|
29-Jan-09
|
16.00
|
6.46
|
|
7.73
|
5.35
|
|
3.6
|
|
|
|
31-Jan-09
|
17.30
|
6.25
|
|
8.03
|
5.13
|
|
4.0
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I-1-C
|
2-Jan-09
|
18.80
|
4.66
|
- / -
|
7.72
|
4.22
|
- / -
|
2.0
|
- / -
|
|
|
5-Jan-09
|
18.00
|
4.92
|
|
7.21
|
3.88
|
|
2.0
|
|
|
|
7-Jan-09
|
18.20
|
4.94
|
|
7.77
|
4.29
|
|
2.0
|
|
|
|
9-Jan-09
|
18.10
|
4.18
|
|
7.73
|
3.97
|
|
3.9
|
|
|
|
12-Jan-09
|
15.30
|
5.85
|
|
7.53
|
5.47
|
|
2.0
|
|
|
|
14-Jan-09
|
18.20
|
4.92
|
|
7.56
|
4.73
|
|
4.0
|
|
|
|
16-Jan-09
|
15.80
|
5.45
|
|
7.42
|
5.15
|
|
2.0
|
|
|
|
19-Jan-09
|
17.70
|
4.63
|
|
7.54
|
5.27
|
|
2.0
|
|
|
|
21-Jan-09
|
17.70
|
5.49
|
|
7.22
|
4.43
|
|
2.0
|
|
|
|
23-Jan-09
|
16.50
|
5.42
|
|
7.73
|
5.27
|
|
2.0
|
|
|
|
29-Jan-09
|
16.00
|
6.53
|
|
7.71
|
5.45
|
|
4.1
|
|
|
|
31-Jan-09
|
17.20
|
6.33
|
|
8.07
|
5.25
|
|
5.5
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I-2
|
2-Jan-09
|
18.30
|
4.74
|
3.66 / 3.63
|
7.73
|
5.24
|
6.63 / 6.99
|
2.0
|
7.68 / 8.34
|
|
|
5-Jan-09
|
18.50
|
4.55
|
|
7.40
|
5.23
|
|
2.0
|
|
|
|
7-Jan-09
|
17.80
|
4.71
|
|
7.44
|
3.69
|
|
2.0
|
|
|
|
9-Jan-09
|
17.30
|
4.66
|
|
7.25
|
3.85
|
|
5.2
|
|
|
|
12-Jan-09
|
15.00
|
5.55
|
|
7.43
|
4.66
|
|
2.0
|
|
|
|
14-Jan-09
|
14.30
|
5.27
|
|
7.63
|
4.09
|
|
2.8
|
|
|
|
16-Jan-09
|
15.25
|
4.83
|
|
7.33
|
4.36
|
|
2.0
|
|
|
|
19-Jan-09
|
19.70
|
4.18
|
|
7.55
|
5.23
|
|
2.0
|
|
|
|
21-Jan-09
|
17.70
|
4.57
|
|
7.55
|
4.24
|
|
2.0
|
|
|
|
23-Jan-09
|
16.50
|
5.23
|
|
7.70
|
5.15
|
|
2.0
|
|
|
|
29-Jan-09
|
16.00
|
6.33
|
|
7.72
|
5.23
|
|
3.7
|
|
|
|
31-Jan-09
|
17.20
|
6.38
|
|
7.82
|
5.45
|
|
2.0
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I-2-C
|
2-Jan-09
|
18.50
|
4.74
|
- / -
|
7.43
|
5.33
|
- / -
|
2.0
|
- / -
|
|
|
5-Jan-09
|
18.25
|
4.70
|
|
7.43
|
5.27
|
|
2.0
|
|
|
|
7-Jan-09
|
18.00
|
4.67
|
|
7.43
|
3.82
|
|
2.0
|
|
|
|
9-Jan-09
|
17.35
|
4.75
|
|
7.24
|
3.83
|
|
4.2
|
|
|
|
12-Jan-09
|
15.20
|
5.60
|
|
7.45
|
4.75
|
|
2.0
|
|
|
|
14-Jan-09
|
14.40
|
5.35
|
|
7.56
|
4.12
|
|
2.9
|
|
|
|
16-Jan-09
|
15.80
|
4.75
|
|
7.33
|
4.29
|
|
2.0
|
|
|
|
19-Jan-09
|
19.60
|
4.06
|
|
7.56
|
5.34
|
|
2.0
|
|
|
|
21-Jan-09
|
17.50
|
4.50
|
|
7.72
|
4.20
|
|
2.0
|
|
|
|
23-Jan-09
|
16.30
|
5.32
|
|
7.71
|
5.19
|
|
2.0
|
|
|
|
29-Jan-09
|
16.20
|
6.39
|
|
7.71
|
5.29
|
|
3.8
|
|
|
|
31-Jan-09
|
17.20
|
6.21
|
|
7.82
|
5.65
|
|
2.0
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I-3
|
2-Jan-09
|
19.30
|
4.35
|
3.65 /
3.51
|
7.52
|
3.43
|
3.99 /
4.18
|
2.0
|
6.13 /
7.23
|
|
|
5-Jan-09
|
18.70
|
4.86
|
|
7.42
|
3.14
|
|
2.0
|
|
|
|
7-Jan-09
|
19.40
|
4.89
|
|
7.80
|
3.57
|
|
2.0
|
|
|
|
9-Jan-09
|
18.95
|
4.65
|
|
7.76
|
3.73
|
|
2.5
|
|
|
|
12-Jan-09
|
15.30
|
5.46
|
|
7.63
|
3.36
|
|
2.0
|
|
|
|
14-Jan-09
|
14.90
|
4.89
|
|
8.02
|
3.46
|
|
2.4
|
|
|
|
16-Jan-09
|
15.20
|
4.36
|
|
7.43
|
3.19
|
|
2.0
|
|
|
|
19-Jan-09
|
18.30
|
4.31
|
|
7.45
|
3.29
|
|
2.0
|
|
|
|
21-Jan-09
|
17.70
|
4.39
|
|
7.55
|
3.34
|
|
2.0
|
|
|
|
23-Jan-09
|
16.70
|
5.48
|
|
7.67
|
3.31
|
|
2.0
|
|
|
|
29-Jan-09
|
16.00
|
6.28
|
|
7.70
|
3.38
|
|
2.0
|
|
|
|
31-Jan-09
|
17.30
|
6.32
|
|
7.42
|
3.41
|
|
2.0
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I-3-C
|
2-Jan-09
|
19.20
|
4.46
|
- / -
|
7.53
|
3.64
|
- / -
|
2.0
|
- / -
|
|
|
5-Jan-09
|
18.50
|
4.67
|
|
7.44
|
3.22
|
|
4.0
|
|
|
|
7-Jan-09
|
19.30
|
4.77
|
|
7.82
|
3.65
|
|
2.0
|
|
|
|
9-Jan-09
|
19.00
|
3.61
|
|
7.77
|
3.61
|
|
2.0
|
|
|
|
12-Jan-09
|
15.20
|
5.41
|
|
7.62
|
3.46
|
|
2.0
|
|
|
|
14-Jan-09
|
14.75
|
5.01
|
|
8.04
|
3.54
|
|
2.1
|
|
|
|
16-Jan-09
|
15.70
|
4.31
|
|
7.44
|
3.21
|
|
2.0
|
|
|
|
19-Jan-09
|
18.50
|
4.27
|
|
7.43
|
3.43
|
|
2.0
|
|
|
|
21-Jan-09
|
17.40
|
4.57
|
|
7.56
|
3.47
|
|
2.0
|
|
|
|
23-Jan-09
|
16.80
|
5.41
|
|
7.70
|
3.43
|
|
2.0
|
|
|
|
29-Jan-09
|
16.00
|
6.22
|
|
7.70
|
3.42
|
|
2.0
|
|
|
|
31-Jan-09
|
17.50
|
6.43
|
|
7.71
|
3.65
|
|
2.0
|
|
Note: Italic indicates
the occurrence of exceedance of Action level.
Bold
indicates the occurrence of exceedance of Limit level.
Table 4‑6 Water
Quality Monitoring Results
4.4
Summary of Project-Related Exceedances
4.4.1
Table 4‑7 summarises the project-related exceedance results
recorded in January 2009. Note that exceedances that
are considered not related to the construction activities are not included in
this table.
|
Environmental Monitoring
|
Total No. of Measurement
|
Action Level Exceedance
|
% of Action Level Exceedance
|
Limit Level Exceedance
|
% of Limit Level Exceedance
|
|
Air Quality
|
72
|
0
|
0
|
0
|
0
|
|
Noise
|
20
|
0
|
0
|
0
|
0
|
|
Water
|
72
|
0
|
0
|
0
|
0
|
Note: Exceedances that are considered not related to
the construction activities are not included in this table.
Table
4‑7 Summary
of Project-Related Exceedances
5.1.1
The status of waste
management is summarized in Table 5‑1 below.
|
Status of waste management
|
Quantity
|
|
Inert C&D Material Disposed of to
Public Fill at Tuen Mun (m3)
|
911.4
|
|
Inert C&D Material Reused in
other Contracts (m3)
|
515
|
|
Metals Generated (kg)
|
5
|
|
Paper / Cardboard Packaging (kg)
|
250
|
|
Plastics (kg)
|
Nil
|
|
Chemical Waste (kg)
|
Nil
|
|
General Waste Disposed of to NENT Landfill (m3)
|
20.1
|
Table 5‑1 Waste
Generated in January 2009
6
NON-COMPLIANCE AND DEFICIENCY
6.1
Site Audit by ET
6.1.1
ET has carried out
two site inspections in the reporting month. All observations together with the appropriate recommended
mitigation measures where necessary were recorded in the audit checklists that
were passed to the Contractor.
Major environmental deficiencies observed during site inspection/audits
and recommendation, which were made by the ET, are summarised in Table 6‑1 below.
No non-compliance was observed.
|
Inspection
Date
|
Observation
|
Recommendation
|
Status
|
|
Follow up issues
|
During site inspection on 19 December 2008, a pile of
exposed debris was observed at the Intake I-3.
|
The
Contractor was requested to either dispose debris off regularly or cover it
with tarpaulin.
|
No exposed debris was observed at
Intake I-3 on 23 January 2009. (Closed)
|
|
8 January 09
|
Slightly
dry haul roads were observed at Intake I-1, I-2, I-3, Outfall and Portion
I&H.
|
Dust suppression measures were
advised to be implemented.
|
During site inspection on 23 January
2009, no dry haul road was observed. (Closed)
|
|
23 January 09
|
C&D waste debris were observed without tarpaulin sheet
cover near grouting machine at Outfall O-1.
|
The
Contractor was requested to cover debris waste or dispose debris waste
regularly.
|
C&D waste debris had been
disposed on 31 January 2009. (Closed)
|
Table 6‑1 Site Inspection by ET
7.1.1
A complaint hotline at 9850 3241
of the Contractor has been established for the Project.
7.1.2
No complaints were
received during the reporting month.
Cumulative statistics of environmental complaints are shown in Table 7‑1.
|
Complaints Received in the Reporting Month
|
Cumulative Number of Complaints
|
|
0
|
0
|
Table 7‑1 Cumulative Statistic of Environmental Complaint
8
SUMMARY OF NOTIFICATION OF SUMMONS,
SUCCESSFUL PROSECUTIONS AND CORRECTIVE ACTIONS
8.1.1
No summons and successful prosecution
was received during the reporting month.
8.1.2
Cumulative statistics of Notification of Summons, Successful
Prosecutions and Convictions are shown in Table
8‑1.
|
Notification of Summons
|
Successful Prosecution
|
|
January 09
|
Cumulative
|
January 09
|
Cumulative
|
|
0
|
0
|
0
|
0
|
Table 8‑1 Cumulative Statistics of Notification of Summons and
Successful Prosecutions
9.1.1
The forecast of
construction works for the upcoming three months are:
§
Site clearance at I-1, I-2, I-3 and Outfall;
§
Hoarding & fencing erection at I-3;
§
Tree transplanting at I-1, I-3 and Outfall;
§
Slope stabilization at Outfall;
§
Soil nailing at Outfall;
§
Relocation of verified boulder at Outfall;
§
Formation of access road at Outfall;
§
Construction of air vent shaft at I-2;
§
Excavation and Lateral Support (ELS) at I-1; and
§
Construction of skin wall at I-3
|
Appendix D
|
|
Implementation Status of
Environmental Mitigation Measures
|
|
Appendix J
|
|
Interim Notifications of
Environmental Quality Limits Exceedances
|
