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 2008.
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 and 24-hr TSP
Two 1-hr TSP Action Level exceedances were recorded at CAM2a
on 6 and 26 March. One 24-hr TSP Limit Level exceedance was recorded at CAM2a
on 18 March. At the
times of these exceedances, no dust generating works related to the Project
were observed in the vicinity of the monitoring stations. Furthermore, no
exceedances were recorded at these stations prior to these exceedances. It
is therefore not considered that these exceedances were caused
by construction works of the Project, but due to
local activities. It was observed
that a planter is being constructed adjacent to the monitoring station. Some
small open stockpiles, which were not induced by the construction works of the
project, were also observed outside the site but close to monitoring stations.
They are considered to be possible causes for the non-project related
exceedances.
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
Due to a
problem with damaged filter papers the March monthly air quality results do not
coincide completely with the scheduled monitoring dates. Additional monitoring
has been carried out to compensate for this.
The
scheduled 24hr air quality monitoring is as follows;
|
Air
Quality Monitoring
|
Monitoring
location
|
Monitoring
dates
|
|
TSP 24hr
monitoring
|
San Po
Street Pumping Station (CAM1a)
|
6 March,
12 March, 18 March, 20 March*, 26 March, 28 March**, 29 March**
|
|
Sheung
Shui Heung Floodwater Pumping Station (CAM2a)
|
6 March,
12 March, 18 March, 20 March*, 26 March, 28 March**, 29
March**
|
*Damaged filter paper
** Additional monitoring
Future Key Issues
The construction
activities for the coming three months will include excavation and backfilling, temporary work including
installation of waling and struts, and extraction of sheet piles, pipe works, roofing and finishing work, Water Tightness
Test, installation of cat ladders, structural steelwork with FRP covers,
roadworks and landscaping.
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
|
Freddie
Tsang
|
2594 7459
|
|
Contractor
- Maeda
|
Site
Agent
|
George
Cheung
|
9268 1918
|
|
ET -
Hyder
|
ET Leader
|
Alexi
Bhanja
|
2911 2916
|
|
IEC –
CH2M HILL
|
IEC
|
Y.T. Tang
|
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;
§
Installation of
waling and struts and extraction of sheet piles;
§
RC wall
construction;
§
Pipe laying;
§
Installation of FRP covers;
§
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
|
15
Nov 2007
|
29
Nov 2007
|
GW-RN0507-07
|
31
May 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, pipe laying and
finishing work were undertaken in Portions 1,2 & 3. Installation of waling
struts & extraction of sheet piles, RC wall construction and the
installation of FRP covers were undertaken in Portion 1 and Water Tightness Tests were undertaken in Portions 1 & 2.
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
|
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
|
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
|
6 March 2008
|
1539-1729
|
3 X 1 hour
|
Sunny
|
|
12 March 2008
|
1110-1410
|
3 X 1 hour
|
Fine
|
|
18 March 2008
|
1000-1300
|
3 X 1 hour
|
Fine
|
|
20 March 2008
|
0945-1255
|
3 X 1 hour
|
Sunny
|
|
26 March 2008
|
1015-1400
|
3 X 1 hour
|
Rainy
|
|
CAM2a
|
6 March 2008
|
1553-1740
|
3 X 1 hour
|
Sunny
|
|
12 March 2008
|
1118-1418
|
3 X 1 hour
|
Fine
|
|
18 March 2008
|
1005-1305
|
3 X 1 hour
|
Fine
|
|
20 March 2008
|
0950-1250
|
3 X 1 hour
|
Sunny
|
|
26 March 2008
|
1025-1410
|
3 X 1 hour
|
Rainy
|
|
24-hr TSP
|
|
CAM1a
|
6 March 2008
|
1730-1730
|
24 hours
|
Sunny
|
|
12 March 2008
|
1645-1645
|
24 hours
|
Fine
|
|
18 March 2008
|
1313-1313
|
24 hours
|
Fine
|
|
20 March 2008
|
1255-1255
|
24 hours
|
Sunny
|
|
26 March 2008
|
1400-1400
|
24 hours
|
Rainy
|
|
28 March 2008
|
1135-1135
|
24 hours
|
Rainy
|
|
29 March 2008
|
1315-1315
|
24 hours
|
Sunny
|
|
CAM2a
|
6 March 2008
|
1746-1746
|
24 hours
|
Sunny
|
|
12 March 2008
|
1653-1653
|
24 hours
|
Fine
|
|
18 March 2008
|
1320-1320
|
24 hours
|
Fine
|
|
20 March 2008
|
1250-1250
|
24 hours
|
Sunny
|
|
26 March 2008
|
1410-1410
|
24 hours
|
Rainy
|
|
28 March 2008
|
1140-1140
|
24 hours
|
Rainy
|
|
29 March 2008
|
1320-1320
|
24 hours
|
Sunny
|
Table 6-8 Sampling Schedule of Air Quality Monitoring
|
Station
|
Date
|
Time
|
Duration
|
Weather
Condition
|
|
NM1
|
06 March 2008
|
1032-1102
|
30 minutes
|
Sunny
|
|
12 March 2008
|
1325-1355
|
30 minutes
|
Fine
|
|
18 March 2008
|
1015-1045
|
30 minutes
|
Fine
|
|
20 March 2008
|
0950-1020
|
30 minutes
|
Sunny
|
|
26 March 2008
|
1027-1057
|
30 minutes
|
Rainy
|
|
NM2
|
06 March 2008
|
1129-1159
|
30 minutes
|
Sunny
|
|
12 March 2008
|
1428-1458
|
30 minutes
|
Fine
|
|
18 March 2008
|
1330-1400
|
30 minutes
|
Fine
|
|
20 March 2008
|
1100-1130
|
30 minutes
|
Sunny
|
|
26 March 2008
|
1130-1200
|
30 minutes
|
Rainy
|
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. Two 1-hr TSP Action Level exceedances were
recorded at CAM2a on 6 and 26 March. One 24-hr TSP Limit Level exceedance was
recorded at CAM2a on 18 March. At the times of these exceedances, no dust generating
works related to the Project were observed in the vicinity of
the monitoring stations.
|
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 2008
|
183.7
|
104.3
|
342.7/500
|
203.3/260
|
|
217.3
|
|
178.2
|
|
12
March 2008
|
186.2
|
50.3
|
|
191.4
|
|
183.9
|
|
18
March 2008
|
269.0
|
120.7
|
|
212.6
|
|
191.0
|
|
20
March 2008*
|
339.0
|
-
|
|
237.3
|
|
198.7
|
|
26
March 2008
|
335.7
|
95.1
|
|
264.1
|
|
259.2
|
|
28
March 2008**
|
-
|
66.9
|
|
-
|
|
-
|
|
29
March 2008**
|
-
|
61.8
|
|
-
|
|
-
|
|
CAM2a
|
6
March 2008
|
172.8
|
84.2
|
340/500
|
201.6/260
|
|
333.3
|
|
422.5
|
|
12
March 2008
|
98.3
|
39.8
|
|
104.1
|
|
117.2
|
|
18
March 2008
|
202.3
|
307.4
|
|
258.4
|
|
213.4
|
|
20
March 2008*
|
302.3
|
-
|
|
173.0
|
|
118.4
|
|
26
March 2008
|
401.6
|
65.5
|
|
218.1
|
|
158.3
|
|
28
March 2008**
|
-
|
30.6
|
|
-
|
|
-
|
|
29 March 2008**
|
-
|
44.2
|
|
-
|
|
-
|
Note:
(1)
“Shading” indicates an exceedance of Action Level. “Bold and shading” indicates an exceedance of
Limit Level.
*No results due to a
damaged filter paper.
**Additional monitoring
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
|
06 March 2008
|
56.6
|
58.1
|
51.7
|
75
|
|
12 March 2008
|
60.4
|
63.0
|
57.0
|
|
18 March 2008
|
57.6
|
64.1
|
50.4
|
|
20 March 2008
|
60.0
|
65.2
|
53.5
|
|
26 March 2008
|
58.5
|
61.1
|
54.5
|
|
NM2
|
06 March 2008
|
50.4
|
52.2
|
46.2
|
|
12 March 2008
|
54.8
|
56.7
|
52.3
|
|
18 March 2008
|
51.8
|
53.9
|
47.5
|
|
20 March 2008
|
53.4
|
55.5
|
48.4
|
|
26 March 2008
|
55.1
|
56.7
|
50.3
|
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 noise monitoring.
Two 1-hr TSP Action Level exceedances were recorded at CAM2a
on 6 and 26 March. One 24-hr TSP Limit Level exceedance was recorded at CAM2a
on 18 March.
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
Two 1-hr TSP
Action Level exceedances were recorded at CAM2a on 6 and 26 March. One 24-hr
TSP Limit Level exceedance was recorded at CAM2a on 18 March. At the times of
these exceedances, no dust generating works related to the Project were
observed in the vicinity of the monitoring stations. It was observed that a planter is being constructed adjacent
to the monitoring station. Some small open stockpiles, which were not induced
by the construction works of the project, were also observed outside the site
but close to monitoring stations. They are considered to be possible causes for
the non-project related exceedances.
Furthermore, no other exceedances were recorded at the monitoring
stations prior to these exceedances. Based on the above observations and
findings, it is therefore not considered that these exceedances were caused by
construction works of the Project.
·
Differing
1hr TSP and 24hr TSP results
On
18 March 2008,1 hr monitoring was carried out 3 times consecutively after each
other and 24 hr TSP monitoring was carried out after this. There is no overlap
of these monitoring periods.
On this
date CAM2a shows an exceedance (307.4 ug/m3) of the limit level for
air quality (TSP 260 ug/m3) the 1 hr monitoring results are all
relatively high but remain under the action level for 1 hr TSP (340 ug/m3).
As the periods for 1 hr and 24 hr
monitoring do not overlap such a discrepancy between the results is possible
though normally unlikely. Reasoning for this will be a decrease in air quality
after the 3 hr monitoring is carried out. Again the works in close proximity to
the monitoring station are the most likely explanation.
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 5,
12, 19 and 27 March 2008. 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
|
|
5 March 2008
|
No environmental deficiency was observed.
|
N.A.
|
N.A.
|
1.
The
contractor was reminded to provide wheel washing at site exit and to remove
the muddy tracks.
|
|
12 March 2008
|
1.Muddy trail was observed at side exit.
|
1.The Contractor is requested to provide proper
wheel washing to vehicles leaving the site.
|
1. During site inspection on 27 March, a wheel
washing facility has been found (Closed).
|
1.Haul road at Portion 2 was
observed dry and dusty, the Contractor was reminded to provide water spraying
more frequently.
|
|
19 March 2008
|
1.
General
refuse was observed not cleared up at RAS/SAS pump station.
2.
Stagnant
water and general refuse were observed not cleared up at sludge press house.
3.
Soil
of stockpiles was observed without full covering at number 7 sedimentation
tank and bioreactor.
|
1.
The
Contractor was requested to clear up immediately.
2.
The Contractor was requested to clear up
immediately.
3. The
Contractor was requested to fully cover.
|
1.
Closed
2.
Closed
3.
Closed
|
1.No provision water spraying was observed near
bioreactor and sedimentation tank number 7. The Contractor was reminded to provide
water spraying more frequently.
|
|
27 March 2008
|
No environmental deficiency was observed.
|
N.A.
|
N.A
|
N.A
|
Table
7-12 Summaries of Site Inspections and Recommendations
The site audit conducted by IEC was carried out on 19 March 2008 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. There was no EPD inspection carried out in March
2008.
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 – 495.264 m3, and
§
General Refuse – 32.5 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;
§
Installation of
waling and struts;
§
Extraction of
sheet piles;
§
Pipe works;
§
Installation of
cat ladders;
§
Water Tightness Test;
§
Roofing and finishing work;
§
Structural
steelwork with FRP covers;
§
Roadwork; and
§
Landscaping.
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 March
2008 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.
The air quality exceedances are
considered to be non- Project related.
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.
