Table of Contents
Table of Contents i
List of Tables ii
List of Figures ii
List of Appendices ii
EXECUTIVE SUMMARY 1
1. PROJECT BACKGROUND 2
1.1 Project Organization and Contact Personnel 2
2. SENSITIVE RECEIVERS 3
3. CONSTRUCTION WORKS & PROGRAMME 3
4. SUMMARY OF
EM&A REQUIREMENT 3
5. MONITORING METHODOLOGY 5
5.1 Monitoring Programme 5
5.2 Air Quality Monitoring 6
5.3 Noise Monitoring 6
6. RESULTS 7
6.1. Air Quality 7
6.2. Noise 7
6.3. Weather Conditions 8
7. SITE INSPECTION
& AUDIT 9
8. Non-compliance,
Complaints, Notifications of Summons and Successful Prosecutions 9
9. OTHERS 9
10. CONCLUSIONS 9
List
of Tables
Table
1 Contact Details of Key Personnel
Table
2 Interrelationship between
Construction Activities and Mitigation Measures
Table 3 Action and Limit Level for Air Quality Impact Monitoring at Yuet
Wu Villa
Table 4 Action and Limit Levels for Construction
Noise Impact Monitoring
Table 5 Event Action Plan
Table 6 Noise
Monitoring Equipment
Table 7 1-hour TSP Monitoring Results
Table 8 24-hour TSP Monitoring Results
Table 9 Noise Monitoring Results
Table 10 Summary
of Weather Conditions during the Monitoring Period
List of Figures
Figure
1 Site
Location Plan
Figure
2 Location
of Air Quality Monitoring Station
Figure
3 Location
of Noise Monitoring Station
Figure
4 Photos
of Air Quality Monitoring Station
Figure
5 Photos
of Noise Monitoring Station
Figure
6 Photos
of the Construction Site for the Junior Police Officers’ Married Quarters
List
of Appendices
Appendix
A Calibration
Record of High-Volume TSP Sampler
Appendix
B Calibration
Certification of the Sound Level Meter and Calibrator
Appendix
C Summary
of 1-Hour TSP Monitoring Record
Appendix
D Summary
of 24-Hour TSP Monitoring Record
Appendix
E Summary
of Noise Monitoring Record
Appendix
F Wind
Record from Hong Kong Observatory
Appendix
G Mitigation
Measures Implementation Schedule for Construction Stage
Allied Environmental Consultants Limited
(AEC) has been appointed to conduct an environmental monitoring and audit
(EM&A) program for the proposed Joint User Complex and
Wholesale Fish Market at Area 44, Tuen Mun. The construction works were
commenced on 31st
July 2008. This report is the seventh monthly EM&A report, which
detailed the
environmental monitoring and audit results recorded during the period from 1st
April 2009 to 30th April 2009.
Impact environmental monitoring for the proposed Joint User Complex and Wholesale Fish Market at Area
44, Tuen Mun has been carried out on 3rd, 9th, 15th, 21st and 27th April
2009 at Block 15, Yuet Wu Villa. 1-hr TSP and noise monitoring were
conducted within the period of 0700-1900 hours, where 24-hr TSP
monitoring was conducted continuously for a 24-hour period.
1-hour TSP monitoring results at the monitoring location ranged from 123μg/m3 to 164μg/m3 with an average of 146μg/m3. 24-hour TSP monitoring
results ranged from 66μg/m3 to 77μg/m3 with an average of 72μg/m3.
Noise monitoring results at the monitoring
location ranged from 62.7dB(A) to 65.7dB(A) with an average of 64.1dB(A).
Based
on the monitoring results, the air quality and construction noise level complied with the environmental requirements
in EM&A Manual. There were no breaches of the action and limit levels.
There were no environmental complaints received in the reporting month. No notification
of summons or prosecution was received.
Construction
activities will be
undertaken in May 2009 include ELS
and pile cap construction, underground building services, erection for tower crane and
ground floor
superstructure. Potential environmental impacts include dust generation from stockpiles
of dusty materials, the superstructure and the underground building services; noise from operation of the
equipments, runoff from underground
building services and
the storage of various C&D and chemical wastes. The Contractor should
properly implement the required environmental mitigation measures as per the
implementation schedule in the EM&A manual to ensure no significant adverse
environmental impacts to be arisen from the construction works. The Contractor
was reminded to maintain good housekeeping throughout the construction phase.
A Joint User
Complex and Wholesale Fish Market (WFM Complex) at Area 44 in Tuen Mun is proposed to be designed and
built by Architectural Services Department on behalf of Agriculture, Fisheries
and Conservation Department, Marine Department, Home Affairs Department, and Food
and Environmental Hygiene Department of the Hong Kong SAR. The WFM Complex is
to provide a permanent site for the relocation of the existing temporary
wholesale fish market at Tuen Mun Area 27 and to accommodate a community hall,
a dragon boat racing spectator stand, and other community facilities for public
use. The proposed development is a 3-storey complex to
accommodate a wholesale fish market, a public toilet, a refuse collection point
and a marine refuse collection point at the ground floor, a community hall on
the first floor, and a dragon boat race spectator stand with landscaped deck on
roof level. The proposed
Wholesale Fish Market is categorized as a designated project under the
Environmental Impact Assessment Ordinance (EIAO) and therefore a detailed
Environmental Impact Assessment (EIA-085/2002) has been conducted in year 2002
and an Environmental Permit (EP-296/2007) was issued by Environmental
Protection Department in December 2007.
The subject site is located at Castle Peak
Bay of Tuen Mun given in Figure 1. The subject site is bounded to the north by a future local
open space presently used as a temporary car park, to the east by Castle Peak Bay typhoon shelter, to the south by a
future lorry park and to the west by Wu
Shan Road. Yuet Wu Villa being the nearest
residential establishment is located at around 85m from the site boundary.
Key personnel and contact particulars are summarized in Table 1.
Table 1 Contact
Details of Key Personnel
|
Role
|
Department
/ Company
|
Names
|
Contact
Number
|
Fax
Number
|
|
Lead User
Department
|
Agriculture,
Fisheries, and Conservation Department
|
Mr. K.H. Chan
Ms. Louise Li
|
2150 7092
2150 7104
|
2314 2866
|
|
Environmental
Permit Holder
|
Architecture
Services Department
|
Mr. S.W. Chow
Ms. Susana Chan
|
2867 3716
2867 3706
|
2523 9622
|
|
Architect
|
P&T
Architects and Engineers Ltd.
|
Ms. Sarah Ng
Ms. Vivian Law
|
2835 3548
2832 3046
|
2891 3834
|
|
Main
Contractor
|
W. Hing
Construction Co. Ltd.
|
Mr. Andy Chan
Mr. Jim Lee
|
9630 7404
6105 4076
|
8343 9188
|
|
Environmental
Team Leader
|
Allied
Environmental Consultants Ltd.
|
Ms. Grace
Kwok
|
2815 7028
|
2815 5399
|
|
Independent
Environmental Checker
|
Cinotech
Consultants Ltd.
|
Mr. Alex
Ngai
|
2151 2083
|
3107 1388
|
Air Sensitive Receivers (ASRs) within 500m include Yuet Wu Villa, lawn bowling field,
tennis court, which are less than 100m
away from the subject site. Tuen Mun Wu Hong Clinic is located to the west at
about 100m to the site
boundary. Two secondary schools, Ka Chi Secondary School and South Tuen Mun Government
Secondary School, are
approximately 300m
to the south of the site boundary.
Noise Sensitive Receivers (NSRs) within 300m are Yuet Wu Villa, Siu Hei Court, Yan Chai
Hospital Low
Chan Chor
Si Primary
School and Wu King Estate. The nearest NSR will
be Block 15 of Yuet Wu Villa.
The major works undertaken and/or completed during the
monitoring period are listed below:
-
Pile cap and ELS construction
-
Underground building services
-
Ground floor superstructure
-
Tower crane erection
Table 2 shows the interrelationship between construction activities and
environmental mitigation measures for the reporting month.
Table 2 Interrelationship
between Construction Activities and Mitigation Measures
|
Construction
Works
|
Major Environmental Impact
|
Mitigation Measures
|
|
Underground building
services
|
Air quality and water quality impacts
|
Water spraying, avoided rainy days
|
|
Superstructure
|
Noise impact
|
Well-maintained plants were used
|
|
Concrete works
|
Noise and
water quality impacts
|
Well-maintained
plants were used, waste water were reused when practicable
|
For regular
impact monitoring, the sampling frequency of at least once in every six-days,
shall be strictly observed at the monitoring station for 24-hr TSP monitoring.
For 1-hr TSP monitoring, the sampling frequency of at least three times in
every six-days should be undertaken when the highest dust impact occurs. For
noise monitoring, one set of measurement between 0700-1900 hours on normal
weekdays. Leq(30 min) shall be used as the monitoring
parameter.
From baseline monitoring results, the proposed Action and Limit Levels for air quality are summarized in Table 3. The average baseline 1-hr TSP value of 129μg/m3 and 24-hr TSP value of 65μg/m3
measured at Block 15, Yuet Wu Villa was used to determine the action and limit
level for air quality impact monitoring. The proposed Action and Limit Levels
for construction noise are summarized in Table 4.
Table 3 Action
and Limit Level for Air Quality Impact Monitoring at Yuet Wu Villa
|
Parameters
|
Baseline Level (μg/m3)
|
Action Level (μg/m3)
|
Limit Level (μg/m3)
|
|
24-Hour TSP Level
|
65
|
173
|
260
|
|
1-Hour TSP Level
|
129
|
334
|
500
|
Table 4
Action and Limit Levels for Construction Noise Impact Monitoring
|
Time
Period
|
Action
Level
|
Limit Level
|
|
Daytime (0700-1900 hours) on weekdays
|
When one documented compliant is received
|
Dwelling 75dB(A)1
School 70dB(A)1
(65dB(A) during
examinations)1
|
|
1900-2300 on any day and 0700-2300 on
Sunday and general holidays, for use of PME2
|
When one documented compliant is received
|
65dB(A)3
|
|
All days during the night-time (2300-0700
hours) 2
|
When one documented compliant is received
|
50dB(A)3
|
Note: 1. Construction
noise criteria stipulated in the TM-EIAO
2. A Construction
Noise Permit (CNP) shall be required for the carrying out of the construction
work during the restricted hours (1900-2300 on any day
and 0700-2300 on Sunday and general holidays, for use of PME; and All days
during the night-time (2300-0700 hours))
3. Area sensitivity rating of the monitoring location
is “B”.
Should non-compliance of the above Action and Limit levels occurs, the
contractor shall undertake corresponding in accordance with the proposed Event
Action Plan given in the EM&A Manual. A summarized general Event Action
Plan is given in Table 5. Details should be referred to
the Event Action Plan in the EM&A Manual.
Table 5 Event
Action Plan
|
Level
|
Step
1
|
Step
2
|
Step
3
|
|
Action
|
l Identify source
l Check monitoring data and working methods
|
l Contact project manager to discuss and
implement remedial action
l Rectify any unacceptable practice
l Amend working methods if appropriate
l If exceedance continues, commence
additional monitoring
|
l Notify client/project manager following
correct of the situation
l Cease additional monitoring if exceedance
stops
|
|
Limit
|
l Identify source
l Notify client/project manager
l Check monitoring data and working methods
l Repeat measurement to confirm finding
l Commence additional monitoring
|
l Take immediate action to avoid further
exceedance
l Submit proposal for remedial actions to
client/project manager within 3 working days
l Implement the agreed proposal
l If exceedance continues, amend and
resubmit the proposal
|
l Notify client/project manager following
correction of the situation
l Cease additional monitoring if exceedance
stops
|
Air quality monitoring and noise
monitoring were conducted at Block 15, Yuet Wu Villa on 3rd, 9th, 15th, 21st and
27th April 2009. Air quality monitoring station was set up
at the roof top of the residential block and noise monitoring was conducted at 1.2m above ground level at the junction
of Wu Sau Street and Wu On Street as given in Figure
2
and 3. Figure
4
and 5 show photos taken during monitoring at the
two locations.
A
construction site for the proposed Junior Police Officers' Married Quarters is
located at Wu Hong Street which is 110m
away from the monitoring location, which can be a major source of the noise and
TSP generation during the monitoring period. Figure 6 shows the photo of the construction site.
1-hour and 24-hour TSP air quality monitoring was conducted at the designated
air quality monitoring location using a High Volume TSP Sampler (Model No: Anderson GMWS-2310 ACCU-VOL) at the designated location. The Calibration Record of the High-Volume TSP
Sampler is given in Appendix A. 24-hour TSP samples were taken every six
days. 1-hour TSP samples were taken three times a day
between 0700-1900 hours.
Noise monitoring was conducted
at the designated noise monitoring location between 0700-1900 hours using a sound
level meter which complies with the International Electrotechnical Commission
Publications 651:1979 (Type 1) and 804:1985 (Type 1). Noise instrumentation
details are given in Table 6 and the Calibration
Certificate for the sound level meter and calibrator is given in Appendix B.
Table 6 Noise
Monitoring Equipment
|
Manufacturer
|
Type/Model No.
|
Equipment
|
|
RION
|
Model NL 31
|
Precision Sound Level Analyser with windshield
|
|
RION
|
Model NC 73
|
Calibrator
|
Noise level measurements
were recorded in terms of thirty minutes A-weighted equivalent continuous sound
pressure level (Leq(30min)) on a daily basis. The sound level meter was
calibrated immediately prior to and following each noise measurement. The meter
was mounted on a tripod at a height of 1.2m
and the microphone was positioned at 1m
away the building façade of the noise monitoring station facing the
construction site.
Noise measurements were not made in the presence of fog, rain, and wind
with a steady speed exceeding 5m/s
or wind with gusts exceeding 10m/s.
The wind speed was checked with a portable anemometer capable of measuring the
wind speed in m/s.
1-hour and 24-hour TSP monitoring results are
summarized in Table 7 and 8 and serve as the basis for
determining the action and limit levels. The minimum and maximum 1-hour TSP
measured at Yuet Wu Villa was 123μg/m3 and 164μg/m3 respectively
with an average of 146μg/m3. The minimum and maximum 24-hour
TSP measured was 66μg/m3 and 77μg/m3 respectively
with an average of 72μg/m3. Summary of air quality
monitoring record is provided in Appendix C and
D.
Table 7 1-Hour
TSP Monitoring Results
|
Day
|
Date
|
1-hr TSP (μg/m3)
|
Average
(μg/m3)
|
|
Reading 1
|
Reading 2
|
Reading 3
|
Average
|
|
1
|
3
Apr 2009
|
123
|
132
|
149
|
135
|
146
|
|
2
|
9 Apr 2009
|
143
|
141
|
154
|
146
|
|
3
|
15 Apr 2009
|
145
|
152
|
161
|
153
|
|
4
|
21 Apr 2009
|
135
|
156
|
149
|
147
|
|
5
|
27 Apr 2009
|
141
|
146
|
164
|
150
|
Table 8 24-Hour
TSP Monitoring Results
|
Day
|
Date
|
24-hr TSP (μg/m3)
|
|
1
|
3
Apr 2009
|
66
|
|
2
|
9 Apr 2009
|
77
|
|
3
|
15 Apr 2009
|
75
|
|
4
|
21 Apr 2009
|
69
|
|
5
|
27 Apr 2009
|
71
|
|
|
Average
|
72
|
Noise monitoring results in terms of Leq(30min), L10(30min)
L90(30min) measured at the designated noise monitoring location are
summarized in Table 9. L10 and L90 represent
sound levels that are exceeded 10% and 90% of the time respectively. Normally,
L10 measurements can be considered as the average peak levels, whilst
L90 levels can be considered as the average background noise levels.
During the reporting month, the minimum and maximum noise level measured at Yuet Wu Villa was 62.7dB(A) Leq(30min)
and 65.7dB(A)
Leq(30min) respectively with an average of 64.1dB(A) Leq(30min).
No exceedance was recorded in this reporting period. Summary of noise monitoring record will be
provided in Appendix E.
Table 9 Noise
Monitoring Results
|
Day
|
Date
|
L10(30mins) (dB(A))
|
L90(30mins) (dB(A))
|
Leq(30mins) (dB(A))
|
|
1
|
3
Apr 2009
|
67.5
|
57.8
|
65.7
|
|
2
|
9 Apr 2009
|
66.5
|
61.1
|
64.2
|
|
3
|
15 Apr 2009
|
66
|
60.7
|
64.2
|
|
4
|
21 Apr 2009
|
65.2
|
60.7
|
63.7
|
|
5
|
27 Apr 2009
|
64.6
|
58.7
|
62.7
|
|
|
Average
|
66.0
|
59.8
|
64.1
|
Weather data of the monitoring station were obtained from the nearest
Hong Kong Observatory (HKO) Tuen Mun automatic weather station located at Tuen
Mun Town Park (63 mPD). Table 10 summarizes the wind data during the
monitoring dates. Wind record from HKO is shown in Appendix
F.
Table 10 Summary of
Weather Conditions during the Monitoring Period
|
Date
|
Weather
|
Prevailing
Wind direction
|
Daily Average
Wind speed (m/s)
|
|
3
Apr 2009
|
Cloudy
|
S
|
2.44
|
|
9 Apr 2009
|
Sunny
|
SE
|
2.48
|
|
15 Apr 2009
|
Sunny
|
S
|
2.92
|
|
21 Apr 2009
|
Cloudy
|
NE
|
3.33
|
|
27 Apr 2009
|
Cloudy
|
SE
|
3.17
|
5 site
inspections were conducted by representatives of the Environmental Team (ET) in
this reporting period. These site inspections were conducted on 3rd,
9th, 17th, 24th, and 29th April
2009. The environmental condition on site was acceptable. There was a minor
exception that the stockpiles were only partially covered during site
inspections on 29th April 2009 and it was rectified immediately.
During site inspections in the reporting month, no non-conformance of implementation
of environmental mitigation measures was identified. All environmental mitigation measures for construction
stages stated in approved EIA Report, EM&A Manual and Environmental Permit
shall be carried out throughout the whole construction period as shown in Appendix G.
8. Non-compliance,
Complaints, Notifications of Summons and Successful Prosecutions
In this reporting
period, no complaint, inspection notice, notification of summons
or prosecution was received. No non-compliance was recorded.
276.3 inert
C&D waste was disposed of at public fill. 6.22 tonnes of waste was disposed
to landfill. No chemical waste was transported off site in this reporting
period.
Environmental monitoring
has been carried out for the proposed Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun. 1-hour and 24-hour TSP air quality monitoring and noise monitoring was
conducted at Block 15, Yuet Wu Villa during the period from 1st April 2009 to 30th April 2009.
The average 1-hour
TSP level is 146μg/m3 and average 24-hour TSP level is 72μg/m3. For impact noise monitoring, the Average Leq(30min) is 64.1dB(A). All monitoring results complied with the
relevant action and limit levels.
Author:
