The expansion of Shek Wu Hui
Sewage Treatment Works (SWHSTW) aims to increase the treatment capacity of the
existing SWHSTW to cope with the increasing wastewater flows and loads as a
result of the population growth in the catchment area of Fanling/Sheung Shui
and the committed extension of sewerage system to unsewered areas. It is considered as
a project constituting a material change to an exempted designated project
under Schedule 2 of EIAO. Thus, the procedures under the
EIAO have been followed and an Environmental Monitoring and Audit (EM&A)
Programme has to be carried out. The present report documents the
outcomes of the EM&A Works undertaken during March 2007.
Breaches of Action and Limit Levels
Noise
No non-compliance of
action/limit level was recorded at all monitoring stations for noise during the
reporting month.
1-hr TSP
No non-compliance of
action/limit level was recorded at all monitoring stations for 1-hr TSP during
the reporting month.
24-hr TSP
No non-compliance of
action/limit level was recorded at all monitoring stations for 24-hr TSP during
the reporting month.
Complaints Log
During this reporting month, no environmental complaint was
received.
Notifications of Any Summons and Successful Prosecutions
During the reporting month, no notification of
summons or successful prosecution was recorded.
Reporting Changes
There was no reporting change during the reporting
month.
Future Key Issues
The construction activities for the coming three months will include
excavation and backfilling, temporary
work including driving of sheet piles, extraction of sheet piles, sub-structure
and superstructure construction, pipe
works, finishing work, steelwork and Fiber Glass Reinforced Plastic
installation.
2.1
Basic
Information
Shek Wu Hui Sewage Treatment
Works (SWHSTW) provides treatment to the wastewater generated from Fanling/Sheung
Shui areas before discharge it into Mai Po Inner Deep Bay Ramsar Site through
River Indus and Shenzhen River, thus helps protecting the water quality of
River Indus, Shenzhen River and Mai Po Inner Deep Bay Ramsar Site. The expansion of SWHSTW aims to expand the
treatment capacity of the existing SWHSTW to cope with the increasing
wastewater flows and loads as a result of the population growth in the
catchment area of Fanling/Sheung Shui and the committed extension of sewerage
system to unsewered areas.
In accordance with Section 9(2)(g) of the
Environmental Impact Assessment Ordinance (EIAO), the SWHSTW is an exempted
designated project as the existing SWHSTW has been in operation before the EIAO
came into effect on 1 April 1998. However, since the proposed
works involve physical expansion and alternation to the existing SWHSTW (hereafter
called “the Project”) and may cause adverse
environmental impacts if mitigation measures are not in place, it shall be
considered as a project constituting a material change to an exempted
designated project under Schedule 2 of EIAO.
Hence the
procedures under the EIAO have been followed.
A Project Profile (PP) for direct
application of the EP (Application No.DIR-121/2005) was approved by
Environmental Protection Department (EPD) in May 2005 and an environmental permit (EP-218/2005)
was obtained prior to the commencement of the expansion
works.
Drainage Services Department (DSD) awarded
the civil contract of the expansion of SWHSTW to Maeda Corporation (Maeda) in
September 2005. Maeda appointed Hyder
Consulting Limited (HCL) as the Contractor’s Environmental Team (ET) during the construction period.
CH2M HILL Hong Kong Limited (formerly known as CH2M-IDC Hong Kong
Limited) is the independent environmental checker (IEC). The construction contract commenced in
September 2005 and the total construction period is approximately 36
months. The notified commencement date
of work to the Director of EPD is 14 December 2005.
2.2
Management
Structure and Project Organisation
The Engineer (DSD) is responsible for overseeing the construction
works and ensuring that they are undertaken by the Contractor (Maeda) in
accordance with the specifications and contractual requirements. The Contractor shall report to the Engineer. The ET is employed by the Contractor and is
responsible for conducting the EM&A programme. The IEC shall advise the Engineer on the environmental issues
related to the Project.
The key personnel contact names and telephone number are summarised
in Table 2-1. The project organisation
is shown in Appendix 1.
|
Party
|
Position
|
Name
|
Telephone number
|
|
Project
Proponent - DSD
|
Project
Manager
|
Raymond
Lee
|
2594 7457
|
|
Engineer’s
Representative
|
Tim Tsoi
|
2594 7460
|
|
Contractor
- Maeda
|
Site
Agent
|
George
Cheung
|
9268 1918
|
|
ET -
Hyder
|
ET Leader
|
Alexi
Bhanja
|
2911 2916
|
|
IEC –
CH2M HILL
|
IEC
|
David
Yeung
|
2872 2934
|
Table
2-1 Key Personnel Contact Names and Telephone Number for the
Project
2.3
Construction Programme
Construction programme of the Project is attached in Appendix 2.
2.4
Works Undertaken during the Reporting
Month
Works undertaken during the reporting month included:
§
Excavation and
backfilling;
§
Driving of sheet
piles;
§
Extraction of
sheet piles;
§
Substructure and
superstructure construction;
§
Pipe laying;
§
Fiber
Glass Reinforced Plastic hand railing installation; and
§
Finishing work
2.5
Status of Environmental Permit/
Licence
The status of the
Environmental Permit/Licence for the Project is shown below.
|
Permit/Licence
|
Application
Date
|
Date
of issue
|
Ref.
No.
|
Valid
Until
|
|
Environmental Permit
|
21 May 2005
|
16 June 2005
|
EP-218/2005
|
N/A
|
|
Notification was made to
EPD pursuant to Section 3(1) of the Air Pollution Control (Construction Dust)
Regulation (Form NA was submitted)
|
22 Sep 2005
|
N/A
|
N/A
|
N/A
|
|
Registration as a chemical
waste producer
|
26 Sep 2005
|
4 Nov 2005
|
WPN: 5213-624-M2446-06
|
N/A
|
|
Effluent
Discharge Licence
|
11
Nov 2005
|
20
Dec 2005
|
Licence
No.: W5/1I287/1
|
19
Dec 2010
|
|
Application
for Exemption Account for Disposal of Construction Waste
|
12
Dec 2005
|
Approved
by EPD on 31 Dec 2005
|
Application
No.: RN/00134
|
25
Sep 2008
|
Table 2-2 Status of Permit/Licence for the Project
3.1
Works
Undertaken during the Month with Illustrations
The site
has been subdivided into different Works Areas/Portions as illustrated in
Appendix 3. Excavation, backfilling,
driving and extraction of sheet piles, substructure works were undertaken in
Portions 1 and 2. Pipe laying and Fiber Glass Reinforced Plastic
hand railing installation were undertaken at Portion 2. Superstructure construction was undertaken
in Portions 1 to 3. Finishing work in
Portion 3.
3.2
Project
Area, Environmental Sensitive Receivers and Monitoring Locations
The site is located at the existing Shek Wu Hui Sewage Treatment
Plant, next to Chuk Wan Street. The
project area, environmental sensitive receivers and monitoring locations are
shown in Appendix 4.
4.1
Monitoring Parameters
4.1.1
Air Quality
During the construction phase impact monitoring, 1-hour and 24-hour
Total Suspended Particulates (TSP) levels should be measured at the selected air monitoring locations in accordance
with the EM&A Manual. These two
parameters are aimed to indicate the
impacts of construction dust on air quality.
4.1.2
Noise
The construction noise level should be measured in terms of the A-weighted equivalent continuous sound
pressure level (Leq) for 30 minutes. Leq(30 min) is used as the monitoring parameter for the period between 0700 and
1900 hours on normal weekdays. For all
other time periods, three consecutive Leq(5min) are employed for comparison with the Noise Control Ordinance (NCO)
criteria.
Other noise parameters such as L10 and L90
should also be obtained for reference.
4.2
Action and Limit Levels
4.2.1
Air Quality
The baseline monitoring results documented in the Baseline
Monitoring Report for the Project (our report ref.: EA01284R0012) form the
basis for derivation of the Action and Limit Levels for air quality impact monitoring. Appendix 5 shows the
derived Action and Limit Levels for the Project. If the air quality criteria are exceeded due to the Project, the
Event/Action Plan summarised in Table 4-3 should be triggered immediately.
4.2.2
Noise
The Action and Limit Levels for construction noise are defined in Appendix
5. If valid
non-compliance of the criteria occurs, actions in accordance with the Event and
Action Plan in Table 4-4 should be implemented. If construction works are undertaken during the restricted hours,
a construction noise permit under NCO shall be obtained by the Contractor.
4.3
Event and Action Plans
The Event and Action Plans for air
quality and noise monitoring are shown in Tables 4-3 and 4-4, respectively.
EVENT
|
ACTION
|
|
ET
|
IEC
|
ER
|
CONTRACTOR
|
|
ACTION LEVEL
|
|
Exceedance for one sample
|
·
Identify
source, investigate the causes of exceedance and propose remedial measures;
·
Inform
IEC and ER;
·
Repeat
measurement to confirm finding.
|
·
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, investigate the cause of exceedance and propose remedial measures ;
·
Inform
IEC and ER;
·
Advise
ER 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 ER;
·
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 ER 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, ER, 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 ER
informed of the results.
·
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
ER 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, ER, Contractor and EPD;
·
Identify
source, investigate the cause of exceedance and propose remedial measures;
·
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 ER to discuss the remedial actions to be taken;
·
Assess
effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER
informed of the results;
·
If
exceedance stops, cease additional monitoring.
|
·
Discuss
amongst ER, ET, and Contractor on the potential remedial actions;
·
Review
Contractor’s remedial actions whenever necessary to assure their
effectiveness and advise ER 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 ER until the exceedance is
abated.
|
Table 4-3 Event/ Action Plan for
Air Quality Monitoring
EVENT
|
Action
|
|
ET
|
IEC
|
ER
|
CONTRACTOR
|
|
Action Level
|
·
Notify IEC and ER;
·
Carry out investigation;
·
Report the results of investigation to the IEC,
ER and Contractors;
·
Discuss with the Contractor and formulate
remedial measures;
·
Increase monitoring frequency to check
mitigation effectiveness.
|
·
Review the analysed results submitted by the
ET;
·
Review the proposed remedial measures by the
Contractor and advise the ER accordingly;
·
Supervise the implementation of remedial
measure.
|
·
Confirm receipt of notification of failure in
writing;
·
Notify Contractor;
·
Require Contractor to propose remedial
measures for the analysed noise problem;
·
Ensure remedial measures are properly
implemented.
|
·
Submit noise mitigation proposal to IEC;
·
Implement noise mitigation proposals.
|
|
Limit Level
|
·
Identify source;
·
Inform IEC, ER, EPD and Contractor;
·
Repeat measurements to confirm findings;
·
Increase monitoring frequency to check
mitigation effectiveness;
·
Carry out analysis of Contractor’s working
procedures to determine possible mitigation to be implemented;
·
Inform IEC, ER and EPD the causes and actions
taken for the exceedances;
·
Assess effectiveness of Contractor’s remedial
actions and keep IEC, EPD and ER informed of the results;
·
If exceedance stops, cease additional
monitoring.
|
·
Discuss amongst ER, ET, and Contractor on the
potential remedial actions;
·
Review Contractors remedial actions whenever
necessary to assure their effectiveness and advise the ER accordingly;
·
Supervise the implementation of remedial
measures.
|
·
Confirm receipt of notification of failure in
writing;
·
Notify Contractor;
·
Require Contractor to propose remedial
measures for the analysed noise problem;
·
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 the ER until the exceedance is abated.
|
Table 4-4 Event/ Action Plan for
Noise Monitoring
4.4
Environmental Mitigation Measures and
Requirements
The recommended measures for mitigating air quality, water quality,
noise, waste and all other possible environmental impacts due to the
construction works have been stated clearly in the EM&A Manual. The details of the measures implemented by
the Contractor are shown in Appendix 6.
The status of the mitigation measures implemented by the Contractor
is listed in Appendix 6.
6.1
Monitoring Methodology
6.1.1
Air Quality
1-hr and 24-hr TSP monitoring works were undertaken by the ET using high volume samplers
(HVS). The sampling procedures followed 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.
During the sampling, dust laden
air was drawn through a HVS fitted with a conditioned, pre-weighted filter
paper, at a controlled rate. After
sampling for 1 hour and 24 hours, the filter paper with retained particles was collected and returned to the
laboratory for drying in a desiccator followed by accurate weighing. Respective 1-hour and 24-hour TSP levels were calculated from the ratio of
the mass of particulates retained on the filter paper to the total volume of
air sampled.
The HVSs were equipped with an
electronic mass flow controller and calibrated against a traceable standard at
regular intervals. All equipment,
calibration kit and filter papers were clearly labelled.
The sampling procedures and
specifications were the same for 1-hour and 24-hour baseline air quality monitoring
except the sampling duration. The
specifications were as follows:
§
0.6-1.7 m3/min (20-60SCFM);
§
Equipped with a timing/control device
with +/- 5 minutes accuracy for 24 hours operation;
§
Installed with elapsed time meter with
+/- 2 minutes accuracy for 24 hours operation;
§
Capable of providing a minimum exposed
area of 406 cm2 (63in2);
§
Flow control accuracy: +/- 2.5%
deviation over 24-hr sampling period;
§
Equipped with a shelter to protect the
filter and sampler;
§
Incorporated with an electronic mass
flow rate controller or other equivalent devices;
§
Equipped with a flow recorder for
continuous monitoring;
§
Provided with a peaked roof inlet;
§
Incorporated with a manometer;
§
Able to hold and seal the filter paper
to the sampler housing at horizontal position;
§
Easy to change the filter; and
§
Capable of operating continuously for
a 24-hour period.
Relevant environmental data
including temperature, pressure, weather conditions, elapsed-time meter reading
for the start and stop of the sampler, identification and weight of the filter
paper, and other special phenomena observed and work progress of the concerned
site were also recorded.
Filter papers of size
8"x10" were labelled before sampling. They were inspected clean with no pin holes and conditioned in a
humidity-controlled chamber for over 24-hr and be pre-weighed before use for
the sampling.
After sampling, the filter papers
loaded with dust were kept in a clean and tightly sealed plastic bag, and then
returned for reconditioning in the humidity controlled chamber followed by
accurate weighing by an electronic balance with a readout down to 0.1 mg. All the collected samples would be kept in a
good condition for 6 months before disposal.
The weight of filter paper was
measured by a HOKLAS accredited laboratory.
6.1.2
Noise
Weatherproof logging sound level meters which comply with the International
Electrotechnical Commission Publication 651: 1979 (Type 1) and 804: 1985 (Type
1) specifications were used to measure the construction noise at the designated
monitoring locations. Noise parameters
of the A-weighted levels Leq, L10 and L90 were
measured with a sampling period of 5 minutes throughout the monitoring. The average of six consecutive 5-minute
readings was used to provide Leq(30 minutes) for non-restricted
hours. A facade correction of 3dB(A)
would be applied to all free field measurements.
During the impact monitoring, information such as date, weather
condition, equipment used, measurement results and major noise sources were
recorded on the field data record sheet.
Noise measurements would not be made in fog, rain, wind with a steady
speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed would be checked with a
portable wind speed meter capable of measuring wind speed in m/s. All measurements were recorded to the
nearest 0.1dB(A).
6.2
Name of Laboratory, Types of Equipment
Used and Calibration Details
6.2.1
Name of Laboratory
Filter papers used for air
quality monitoring were sent to ALS Environmental, a HOKLAS accredited
laboratory, for weighing. Other
sampling and analytical works were conducted by Hyder Consulting Limited, the
ET.
6.2.2
Types
of Equipment Used and Calibration Details
HVS - Model GBM2000H1, manufactured by Anderson Instruments Inc., was used for TSP monitoring.
It complies with the USEPA specifications in Appendix B Part 50 -
Reference Method for the Determination of Suspended Particulate matter in the
Atmosphere (High-Volume Method) of the Code of Federal Regulation dated July 1,
1991. Initial calibration of dust
monitoring equipment was conducted upon installation and prior to
commissioning. One point flow rate
calibration would be carried out every
two months. Five-point calibration would
be carried out every six months. All the calibration data were converted into standard temperature and pressure condition.
Orific HVS Calibration Kit
model G2523 was used for the
calibration of HVSs. Calibration of
calibration kit would be carried out
annually. Appendix 7 presents the
monitoring equipment calibration records.
For noise monitoring, 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 were used.
Prior to and following each noise measurement, the accuracy of the
sound level meter was checked using an
acoustic calibrator (B&K Type 4230) generating a known sound pressure level
at a known frequency. Measurements were considered as valid only if the calibration level from before and
after the noise measurement agree to within 1dB. All sound level meters and calibrators would be calibrated annually.
Appendix 7 presents the monitoring equipment calibration records.
Table 6-5 summarises the types of monitoring and calibration
equipment.
Equipment Type
|
Manufacturer
|
Model
|
Serial Number/I.D.
|
|
Sound
Level Meter
|
B&K
|
Type
2236
|
1774423
|
|
Sound
Level Calibrator
|
B&K
|
Type
4231
|
1770806
|
|
High
Volume Sampler
|
Anderson
|
GBM
2000 H1
|
1097
|
|
High
Volume Sampler
|
Anderson
|
GBM
2000 H1
|
1062
|
|
Orific
HVS Calibration Kit
|
Tisch Environmental
|
G2523
|
517N
|
Table 6-5 Monitoring Equipment
6.3
Parameters Monitored
Parameters
monitored are described in Sections 4.1.1 and 4.1.2.
6.4
Monitoring Locations
There are two designated air
quality monitoring locations identified in the EM&A Manual. Due to the access constraint, alternative
monitoring locations were selected and approved by ER, IEC and EPD prior the commencement of
monitoring. These alternative locations
for air quality monitoring are summarised in Table 6-6 and shown in Appendix 4. The High Volume Sampler at monitoring
location CAM1a was relocated to the end of the vehicle access area which is
around 2m from the original location due to the paving works of granite blocks
inside the San Po Street Pumping Station.
The relocation was undertaken on 17 January 2007. The High Volume Sampler was relocated back
to its original location on 24 February 2007 after the paving works were
finished. Calibration was undertaken on
28 February 2007 prior to the subsequent air quality monitoring conducted on
the same day. The calibration
certificates are shown in Appendix 7.
|
Monitoring Station ID
|
Name
of Premises
|
Monitoring
Location
|
|
CAM1a
|
San Po Street Pumping Station
|
Ground floor level
|
|
CAM2a
|
Sheung Shui Heung Floodwater Pumping Station
|
Ground floor level
|
Table 6-6 Air Quality Monitoring Locations
There are two designated noise monitoring
locations identified in the EM&A Manual and their locations are described
below and shown in Appendix 4.
|
Monitoring Station ID
|
Name
of Premises
|
Monitoring
Location
|
|
NM1
|
Wai Loi Tsuen
|
1.2m above ground
|
|
NM2
|
Temporary Domestic Structure
|
1.2m above ground
|
Table 6-7 Noise Monitoring Locations
6.5
Monitoring Date, Time, Frequency and Duration, Weather Condition and Other Factors
Monitoring frequency for 1-hr TSP and 24-hr
TSP is 3 times every 6 days and once every 6 days, respectively. One set of noise measurements will be conducted between 0700 and 1900 on normal weekdays at each
monitoring station on a weekly basis, when noise-generating activities are
underway. Monitoring date, time and
duration for noise and air quality monitoring and all other factors related to
the monitoring result, such as weather condition, are listed in the following
tables.
|
Station
|
Date
|
Time
|
Duration
|
Weather Condition
|
|
1-hr TSP
|
|
CAM1a
|
6 March 2007
|
1018-1318
|
3 X 1 hour
|
Cloudy
|
|
12 March 2007
|
1008-1315
|
3 X 1 hour
|
Cloudy
|
|
17 March 2007
|
1325-1623
|
3 X 1 hour
|
Cloudy
|
|
23 March 2007
|
1032-1330
|
3 X 1 hour
|
Cloudy
|
|
29 March 2007
|
1018-1318
|
3 X 1 hour
|
Fine
|
|
CAM2a
|
6 March 2007
|
1026-1325
|
3 X 1 hour
|
Cloudy
|
|
12 March 2007
|
1015-1325
|
3 X 1 hour
|
Cloudy
|
|
17 March 2007
|
1333-1630
|
3 X 1 hour
|
Cloudy
|
|
23 March 2007
|
1022-1320
|
3 X 1 hour
|
Cloudy
|
|
29 March 2007
|
1028-1328
|
3 X 1 hour
|
Fine
|
|
24-hr TSP
|
|
CAM1a
|
6 March 2007
|
1320-1320
|
24 hours
|
Cloudy
|
|
12 March 2007
|
1317-1317
|
24 hours
|
Cloudy
|
|
17 March 2007
|
1624-1624
|
24 hours
|
Cloudy
|
|
23 March 2007
|
1331-1331
|
24 hours
|
Cloudy
|
|
29 March 2007
|
1318-1318
|
24 hours
|
Fine
|
|
CAM2a
|
6 March 2007
|
1328-1328
|
24 hours
|
Cloudy
|
|
12 March 2007
|
1388-1328
|
24 hours
|
Cloudy
|
|
17 March 2007
|
1630-1630
|
24 hours
|
Cloudy
|
|
23 March 2007
|
1322-1322
|
24 hours
|
Cloudy
|
|
29 March 2007
|
1328-1328
|
24 hours
|
Fine
|
Table 6-8 Sampling Schedule of Air Quality Monitoring
|
Station
|
Date
|
Time
|
Duration
|
Weather Condition
|
|
NM1
|
6 March 2007
|
1040-1110
|
30 minutes
|
Cloudy
|
|
12 March 2007
|
1025-1055
|
30 minutes
|
Cloudy
|
|
23 March 2007
|
1120-1150
|
30 minutes
|
Cloudy
|
|
29 March 2007
|
1040-1110
|
30 minutes
|
Fine
|
|
NM2
|
6 March 2007
|
1130-1200
|
30 minutes
|
Cloudy
|
|
12 March 2007
|
1130-1200
|
30 minutes
|
Cloudy
|
|
23 March 2007
|
1020-1050
|
30 minutes
|
Cloudy
|
|
29 March 2007
|
1130-1200
|
30 minutes
|
Fine
|
Table 6-9 Sampling Schedule of Noise Monitoring
6.6
Results
and Graphical Plots of Monitoring Parameters
Air quality monitoring results of
1-hour and 24-hour TSP levels are summarised in Table 6-10
and detailed in Appendix 8. Graphical
plots of the monitoring results are also provided in Appendix 8.
|
Station
|
Date
|
Measured Level (mg/m3)
|
Action/Limit Level (mg/m3)
|
|
1-hr TSP
|
24-hr TSP
|
1-hr TSP
|
24-hr TSP
|
|
CAM1a
|
6
March 2007
|
147.3
|
80.9
|
342.7/500
|
203.3/260
|
|
178.0
|
|
124.2
|
|
12
March 2007
|
167.4
|
150.6
|
|
148.1
|
|
144.6
|
|
17 March
2007
|
87.2
|
80.2
|
|
19.0
|
|
69.2
|
|
23
March 2007
|
187.0
|
117.7
|
|
165.7
|
|
133.9
|
|
29
March 2007
|
96.6
|
69.6
|
|
108.7
|
|
54.6
|
|
CAM2a
|
6
March 2007
|
134.6
|
71.9
|
340.2/500
|
201.6/260
|
|
131.7
|
|
162.5
|
|
12
March 2007
|
167.4
|
130.9
|
|
122.0
|
|
143.5
|
|
17 March
2007
|
39.1
|
35.1
|
|
27.8
|
|
43.0
|
|
23
March 2007
|
177.6
|
111.3
|
|
147.4
|
|
119.8
|
|
29
March 2007
|
100.0
|
74.2
|
|
71.9
|
|
71.2
|
Note:
(1)
“Shading”
indicates an exceedance of Action Level.
“Bold and shading” indicates an exceedance of Limit Level.
Table 6-10 Air Quality Monitoring Results
Noise monitoring results are summarised in Table 6-11 and
detailed in Appendix 8. Graphical plots
of the monitoring results are also provided in Appendix 8. As all monitoring was conducted at free
field condition, a facade correction of 3dB(A) was applied to each of the noise
measurements.
Station
|
Date
|
Measured Noise Level, dB(A)
|
Limit Level for
Leq(30 min), dB(A)
|
|
Leq (30min)
|
L10(30min)
|
L90(30min)
|
|
NM1
|
6 March 2007
|
58.2
|
60.5
|
55.0
|
75
|
|
12 March 2007
|
59.1
|
61.0
|
55.0
|
|
23 March 2007
|
58.9
|
61.5
|
55.5
|
|
29 March 2007
|
57.3
|
61.0
|
55.0
|
|
NM2
|
6 March 2007
|
53.4
|
56.0
|
50.0
|
|
12 March 2007
|
55.5
|
58.0
|
53.0
|
|
23 March 2007
|
54.6
|
57.0
|
52.5
|
|
29 March 2007
|
54.2
|
57.5
|
53.0
|
Note : (1) Shaded area indicates an exceedance of Limit Level.
(2) A facade correction of 3dB(A) was
applied to each of noise measurements.
Table 6-11 Noise Monitoring Results
6.7
Factors Which Might Affect the Monitoring Results
Dust from other sources
such as roads with the movement of heavy vehicles in the vicinity of the monitoring
stations would affect the air quality monitoring results. Construction activities of metal cutting
from the E&M installation of the San Po Street Pumping Station and sand
accumulated outside the pumping station were also other sources that would
affect the monitoring results.
6.8
QA/QC Results and Detection Limit
The quality assurance (QA) / quality control
(QC) results and detection limit are shown in Appendix 9.
7.1
Non-compliance of
Action and Limit Levels
No non-compliance of Action or Limit Level was recorded for air
quality and noise monitoring.
7.2
Complaints Received
In case of an environmental complaint received, all related parties
should follow the complaints response procedures specified in the EM&A
Manual.
During this reporting month, no environmental complaint was
received. Cumulative number of
environmental complaint is shown in Appendix 10.
7.3
Notifications of Summons and
Successful Prosecutions
No notification of summons or successful
prosecution was recorded during the reporting month. The cumulative number
of notifications of summons and
successful prosecutions are shown in Appendix
10.
7.4
Review of the Reasons and Implications
of Non-compliance, Complaints, Summons and Prosecutions
7.4.1
Non-compliance of
Acton/Limit Level
No non-compliance was
recorded during the reporting period.
7.4.2
Complaints, Summons and Prosecutions
No complaints, summons
and prosecutions were
recorded during the reporting period.
7.5
Site Inspection
Weekly site inspections were carried out on 7, 14, 21 and 29 March
2007. The findings of the site
inspections and appropriate mitigation measures were recorded in the site
inspection checklists.
The observations raised during the site inspections, corresponding
recommendations and rectification status are summarised in Table 7-12.
Inspection
Date
|
Deficiencies
|
Recommendation
|
Status
|
Note / Reminder
|
|
7 March 2007
|
1. Stagnant water accumulated in the excavation
trench at Portion 1 was observed.
|
1.The Contractor was reminded to drain away
the stagnant water.
|
1.
Improvement
was observed on 14 February 2007.
|
N.A.
|
|
14 March 2007
|
1. Water tube from silt removal facilities
was damage.
|
1.The Contractor was reminded to provide proper maintenance on the
facilities.
|
1. Improvement was observed on 21 February
2007. .
|
N.A.
|
|
21 March 2007
|
1.
No measure
was provided to prevent surface runoff from entering the existing gully near the
transformer room.
|
1. The Contractor was reminded to seal the
gully and diver all surface runoff into silt removal facilities prior to
discharge.
|
1. Improvement was observed on 29 February
2007.
|
N.A.
|
|
29 March 2007
|
No environmental deficiency was observed.
|
-
|
-
|
N.A.
|
Table
7-12 Summaries of Site Inspections and Recommendations
The site audit conducted by IEC was carried out on 14
March 2007 and the Contractor has undertaken appropriate actions in response to
the IEC’s findings.
EPD
inspection was undertaken on 14 March 2007 in the reporting month. Regular inspection on site condition was
conducted. No adverse comment was
given.
There was no outstanding issue or
deficiency for the observations arising during the weekly site
inspections.
According to the information
provided by the Contractor, the following waste materials were generated during
the reporting month:
§
Inert C&D materials – 298.1 m3, and
§
General Refuse – 136.5 m3.
C&D materials were disposed of at Tuen Mun Area 38 Public Fill. General
refuse was collected and disposed of at NENT Landfill properly. No chemical waste was produced during the reporting
month. Trip ticket system was implemented and disposal records were in order on
site. The Waste Management Plan was
followed.
The construction activities for the coming three months are
summarized below:
§
Excavation and
backfilling;
§
Driving of sheet
piles;
§
Extraction of
sheet piles;
§
Sub-structure and
superstructure construction;
§
Pipe works;
§
Finishing works;
and
§
Fiber Glass
Reinforced Plastic installation.
The upcoming EM&A schedule
for the future three months is shown in Appendix 11.
EM&A works have been undertaken during March 2007 for the Project
based on the requirements set in the EM&A Manual.
All monitoring equipments have been calibrated
and all monitoring protocols have been carried out properly according to the
EM&A Manual.
No valid exceedance of Action/Limit Level was
recorded during the reporting month.
No compliant, notification of summons or
successful prosecution was recorded during the reporting month.
Four weekly site inspections were carried out during the reporting
month. In response to the observations
raised by ET, the Contractor has undertaken follow-up actions to rectify the
condition.
