Table of Contents
Table of Contents 1
List of Tables 2
List of Figures 2
List of Appendices 2
EXECUTIVE SUMMARY 3
1. PROJECT BACKGROUND 4
1.1 Project Organization and Contact Personnel 4
2. SENSITIVE RECEIVERS 5
3. CONSTRUCTION WORKS & PROGRAMME 5
4. SUMMARY OF
EM&A REQUIREMENT 5
5. MONITORING METHODOLOGY 7
5.1 Monitoring Programme 7
5.2 Air Quality Monitoring 8
5.3 Noise Monitoring 8
6. RESULTS 8
6.1. Air Quality 8
6.2. Noise 9
6.3. Weather Conditions 10
7. SITE INSPECTION
& AUDIT 10
8. Non-compliance,
Complaints, Notifications of Summons and Successful Prosecutions 11
9. OTHERS 11
10. CONCLUSIONS 11
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 eighth monthly EM&A report, which detailed the environmental monitoring and audit
results recorded during the period from 1st March 2009 to 31th March 2009.
Impact environmental monitoring for the proposed Joint User Complex and Wholesale Fish Market at Area
44, Tuen Mun has been carried out on 5th, 11th, 17th, 23th and 28th March
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 131μg/m3 to 175μg/m3 with an average of 154μg/m3. 24-hour TSP monitoring
results ranged from 64μg/m3 to 85μg/m3 with an average of 75μg/m3.
Noise monitoring results at the monitoring
location ranged from 61.2dB(A) to 64.2dB(A) with an average of 62.2dB(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.
Constructions
activities will be
undertaken in April 2009 include ELS
and pile cap construction, underground building services, ELS and concrete footing 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 7140
|
2314 2866
|
|
Environmental
Permit Holder
|
Architecture
Services Department
|
Mr. S.W. Chow
Ms. Susana Chan
|
2867 3716
2867 6706
|
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. Tim Wong
|
9630 7404
6478 4623
|
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:
-
ELS
and pile cap construction
-
Underground building services
-
ELS
and concrete footing for tower crane
-
Ground floor superstructure
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 5th, 11th, 17th, 23th and
28th March 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 photos 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 levels 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 131μg/m3 and 175μg/m3 respectively with an average of 154μg/m3. The minimum and maximum 24-hour TSP measured was 64μg/m3 and 85μg/m3 respectively
with an average of 75μg/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
|
5
Mar 2009
|
139
|
142
|
156
|
146
|
154
|
|
2
|
11 Mar 2009
|
156
|
152
|
163
|
157
|
|
3
|
17 Mar 2009
|
131
|
153
|
154
|
146
|
|
4
|
23 Mar 2009
|
152
|
154
|
156
|
154
|
|
5
|
28 Mar 2009
|
164
|
175
|
169
|
169
|
Table 8 24-Hour
TSP Monitoring Results
|
Day
|
Date
|
24-hr TSP (μg/m3)
|
|
1
|
5
Mar 2009
|
71
|
|
2
|
11 Mar 2009
|
64
|
|
3
|
17 Mar 2009
|
85
|
|
4
|
23 Mar 2009
|
76
|
|
5
|
28 Mar 2009
|
78
|
|
|
Average
|
75
|
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 61.2dB(A)
Leq(30min) and 64.2dB(A) Leq(30min) respectively with an
average of 62.2dB(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
|
5
Mar 2009
|
64.6
|
59.9
|
62.7
|
|
2
|
11
Mar 2009
|
63.6
|
58.3
|
61.2
|
|
3
|
17
Mar 2009
|
63.7
|
57.9
|
61.9
|
|
4
|
23
Mar 2009
|
63.3
|
58.2
|
61.2
|
|
5
|
28
Mar 2009
|
66
|
62.1
|
64.2
|
|
|
Average
|
64.2
|
59.3
|
62.2
|
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)
|
|
5
Mar 2009
|
Cloudy
|
SE
|
2.91
|
|
11
Mar 2009
|
Cloudy
|
S
|
2.66
|
|
17
Mar 2009
|
Sunny
|
SE
|
2.29
|
|
23
Mar 2009
|
Cloudy
|
S
|
2.59
|
|
28
Mar 2009
|
Cloudy
|
SW
|
2.01
|
4 site
inspections on 6, 12, 20 and 27 March 2009 were conducted by the Environmental
Team (ET) in this reported period. There were no major observations raised by
the ET.
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.
4358.55 m3
of inert C&D waste was disposed at public fill. 8.22 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 March 2009 to 31st March 2009.
The average 1-hour
TSP level is 154μg/m3 and average 24-hour TSP level is 75μg/m3. For impact noise monitoring, the 30-minute average noise level is 62.2dB(A).
Author: 