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 November 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 installation of waling and struts,
driving and extraction of sheet piles, pile cap construction, sub-structure and
superstructure construction, pipe works, cable ducts installation, roofing and finishing work, Water
Tightness Test, installation of chequer plate and staircase, structural
steelwork with FRP covers and roadwork.
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
|
Y.T. Tang (designated)
|
3105 8686
|
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 and extraction of sheet piles;
§
Substructure
construction;
§
Pipe
laying;
§
Installation
of chequer plates;
§
Water
Tightness Test; 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
|
End of Project
|
|
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
|
End of Project
|
|
Registration as a chemical waste
producer
|
26 Sep 2005
|
4 Nov 2005
|
WPN: 5213-624-M2446-06
|
End of Project
|
|
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
|
|
Construction
Noise Permit
|
10
May 2007
|
23
May 2007
|
GW-RN0224-07
|
30
Nov 2007
|
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. Driving and extraction of sheet
piles and Water Tightness Test were undertaken in Portions 1 & 2. Pipe laying, excavation and backfilling were
undertaken in Portions 1 to 3. Substructure
construction was undertaken in Portion 2.
Chequer plates installation was
undertaken in Portion 1. Finishing work
was undertaken in Portions 1 and 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
Brief Summary
of EM&A Requirements
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.
5
Implementation
Status of Environmental Protection and Pollution Control/ Mitigation Measures
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 Serial No: 517N 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
|
1785701
|
|
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
|
N/A
|
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.
|
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
|
03-Nov-2007
|
1111-1401
|
3 X 1 hour
|
Fine
|
|
09-Nov-2007
|
1111-1408
|
3 X 1 hour
|
Fine
|
|
15-Nov-2007
|
1115-1400
|
3 X 1 hour
|
Cloudy
|
|
21-Nov-2007
|
1017-1305
|
3 X 1 hour
|
Fine
|
|
27-Nov-2007
|
1020-1311
|
3 X 1 hour
|
Fine
|
|
CAM2a
|
03-Nov-2007
|
1117-1409
|
3 X 1 hour
|
Fine
|
|
09-Nov-2007
|
1117-1407
|
3 X 1 hour
|
Fine
|
|
15-Nov-2007
|
1122-1408
|
3 X 1 hour
|
Cloudy
|
|
21-Nov-2007
|
1023-1313
|
3 X 1 hour
|
Fine
|
|
27-Nov-2007
|
1027-1320
|
3 X 1 hour
|
Fine
|
|
24-hr TSP
|
|
CAM1a
|
03-Nov-2007
|
1401-1401
|
24 hours
|
Fine
|
|
09-Nov-2007
|
1408-1408
|
24 hours
|
Fine
|
|
15-Nov-2007
|
1400-1400
|
24 hours
|
Cloudy
|
|
21-Nov-2007
|
1305-1305
|
24 hours
|
Fine
|
|
27-Nov-2007
|
1311-1311
|
24 hours
|
Fine
|
|
CAM2a
|
03-Nov-2007
|
1409-1409
|
24 hours
|
Fine
|
|
09-Nov-2007
|
1407-1407
|
24 hours
|
Fine
|
|
15-Nov-2007
|
1408-1408
|
24 hours
|
Cloudy
|
|
21-Nov-2007
|
1313-1313
|
24 hours
|
Fine
|
|
27-Nov-2007
|
1320-1320
|
24 hours
|
Fine
|
Table
6-8 Sampling Schedule of Air Quality Monitoring
|
Station
|
Date
|
Time
|
Duration
|
Weather Condition
|
|
NM1
|
09-Nov-2007
|
0900-0930
|
30 minutes
|
Fine
|
|
15-Nov-2007
|
0930-1000
|
30 minutes
|
Cloudy
|
|
21-Nov-2007
|
0930-1000
|
30 minutes
|
Fine
|
|
27-Nov-2007
|
0930-1000
|
30 minutes
|
Fine
|
|
NM2
|
09-Nov-2007
|
1000-1030
|
30 minutes
|
Fine
|
|
15-Nov-2007
|
1120-1150
|
30 minutes
|
Cloudy
|
|
21-Nov-2007
|
1030-1100
|
30 minutes
|
Fine
|
|
27-Nov-2007
|
1030-1100
|
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
|
3 November
2007
|
151.0
|
169.7
|
342.7/500
|
203.3/260
|
|
143.1
|
|
147.7
|
|
9 November
2007
|
183.0
|
137.3
|
|
144.7
|
|
146.4
|
|
15 November
2007
|
159.3
|
111.7
|
|
107.7
|
|
96.5
|
|
21 November
2007
|
165.5
|
192.6
|
|
176.8
|
|
143.1
|
|
27 November
2007
|
332.0
|
201.2
|
|
302.0
|
|
331.7
|
|
CAM2a
|
3 November
2007
|
87.3
|
171.9
|
340.2/500
|
201.6/260
|
|
91.7
|
|
86.4
|
|
9 November
2007
|
167.5
|
136.0
|
|
162.1
|
|
155.0
|
|
15 November
2007
|
167.4
|
95.0
|
|
95.9
|
|
98.7
|
|
21 November
2007
|
239.0
|
178.1
|
|
196.5
|
|
148.9
|
|
27 November
2007
|
306.3
|
199.3
|
|
324.6
|
|
314.2
|
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
|
09-Nov-2007
|
60.8
|
63.1
|
57.8
|
75
|
|
15-Nov-2007
|
61.9
|
64.8
|
58.9
|
|
21-Nov-2007
|
59.3
|
62.1
|
57.3
|
|
27-Nov-2007
|
60.7
|
62.7
|
57.4
|
|
NM2
|
09-Nov-2007
|
54.8
|
57.3
|
51.3
|
|
15-Nov-2007
|
53.1
|
56.1
|
50.3
|
|
21-Nov-2007
|
54.8
|
57.6
|
52.1
|
|
27-Nov-2007
|
51.8
|
55.4
|
49.4
|
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.
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
Non-compliance, Complaints, Notifications of
Summons and Successful Prosecutions
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 28 November 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 November 2007
|
1.
Mud trails
deposited on the public road around site exit was observed.
|
1. The Contractor was reminded to remove the
mud trails and wash the vehicle wheels properly before vehicles leaving the
site.
|
1. Mud trail deposited on pubic road around
the site exit had been cleared as observed on 14 November 2007.
|
N.A.
|
|
14 November 2007
|
1.
Dust generated by
vehicles movement was observed.
|
1.The Contractor was reminded to provide water spraying to dry haul road
regularly.
|
1.
Water spraying to
haul road was observed on 21 November 2007.
|
1.The Contractor was reminded to clean the WetSep regularly.
2.The Contractor was reminded to remove water ponds inside the site.
|
|
21 November 2007
|
No
environmental deficiency was observed.
|
N.A.
|
N.A.
|
1.The
Contractor was reminded to wash the mud trail around the site entrance
properly.
2.The
Contractor was reminded to label the chemicals and provide drip trays to
chemicals on site.
3.The
Contractor was reminded to provide water spraying to dry open stockpiles
regularly.
|
|
28 November 2007
|
No
environmental deficiency was observed.
|
N.A.
|
N.A.
|
1. The CNP will be
expired on 30 November 2007. The
Contractor was reminded to renew the CNP in the next month.
|
Table 7-12 Summaries of Site Inspections and Recommendations
The
site audit conducted by IEC was carried out on 21 November 2007 and the Contractor has undertaken
appropriate actions in response to the IEC’s findings. There was no outstanding issue or deficiency for
the observations arising during the weekly site inspections.
EPD
inspection was undertaken on 13 November 2007 in the
reporting period. EPD reminded the
Contractor to enhance dust suppression measure during windy season and ensure
wastewater discharge through wastewater treatment facilities.
8
Waste
Management Status
According to the information provided by the
Contractor, the following waste materials were generated during the reporting
month:
§
Inert C&D materials – 1099.16 m3, and
§
General Refuse – 143 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;
§
Installation
of waling and struts;
§
Driving
of sheet piles and extraction of sheet piles;
§
Pile
cap construction;
§
Substructure
and superstructure construction;
§
Pipe
work;
§
Cable
ducts installation;
§
Installation of chequer plate and staircase;
§
Water
Tightness Test;
§
Roofing
and finishing work;
§
Structural
steelwork with FRP covers; and
§
Roadwork.
The upcoming EM&A schedule for the future
three months is shown in Appendix 11.
10
Comments,
Recommendations and Conclusions
EM&A works have been undertaken during November
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.
