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 4
5. MONITORING METHODOLOGY 6
5.1 Monitoring Programme 6
5.2 Air Quality Monitoring 6
5.3 Noise Monitoring 6
6. RESULTS 7
6.1. Air Quality 7
6.2. Noise 8
6.3. Weather Conditions 8
7. SITE INSPECTION
& AUDIT 9
8. Non-compliance,
Complaints, Notifications of Summons and Successful Prosecutions 9
9. OTHERS 10
10. CONCLUSIONS 10
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
Table 11 Summary
of Site Inspections
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
List
of Appendices
Appendix A Detail
Schedule of Monitoring Programme
Appendix B Calibration
Record of High-Volume TSP Sampler
Appendix C Calibration
Certification of the Sound Level Meter and Calibrator
Appendix D Summary of 1-Hour
TSP Monitoring Record
Appendix E Summary of
24-Hour TSP Monitoring Record
Appendix F Summary of Noise
Monitoring Record
Appendix G Wind Record from
Hong Kong Observatory
Appendix H 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 twenty-eighth monthly
EM&A report, which detailed the
environmental monitoring and audit results recorded during the period from 1st
November 2010 to 30th November 2010.
Impact environmental monitoring for the proposed Joint User Complex and Wholesale Fish Market at Area
44, Tuen Mun has been carried out on 2nd, 8th, 13th,
19th and 25th November 2010 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 81μg/m3 to 120μg/m3 with an average of 101μg/m3. 24-hour TSP monitoring
results ranged from 56μg/m3 to 73μg/m3 with an average of 67μg/m3.
Noise monitoring results at the monitoring
location ranged from 60.7dB(A) to 61.2dB(A)
with an average of 60.9dB(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.
In this reporting
period, there was no updated status from EPD regarding the use of powered mechanical equipment, for the
purpose of carrying out construction work other than percussive piling in
respect of which a construction noise permit was not in force on 16th May 2010 at Joint-User
complex and Wholesale Fish Market in Area 44, Tuen Mun, New Territories.
No other complaint,
inspection notice, notification of summons or prosecution was received.
Construction activities were
completed in November 2010.
Potential
environmental impacts include dust generation from stockpiles of dusty
materials and the internal finishes; noise from operation of the equipments, 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.
|
Dr. Priscilla Choy
|
2151 2089
|
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:
-
Defects rectification for internal / external
finishing works;
-
Installation of additional / variation of E&M
works; and
-
Preparation works for handover to end user.
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
|
|
E&M
services and planting works
|
Water
quality impacts
|
Waste
water were reused when practicable
|
|
Internal &
external finishes and installation works
|
Noise
impacts
|
Closely
monitoring of noise impacts
|
4.
SUMMARY OF EM&A REQUIREMENT
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
2nd, 8th, 13th, 19th and 25th
November 2010. The construction activities were completed in
November 2010. Appendix A displayed the detail schedule of the monitoring programme. 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 in front of the residential block and at
the junction of Wu Sau Street and Wu On Street as given in Figures 2 and 3. Figures 4 and 5 show photos taken during monitoring at the
two locations.
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 B. 24-hour TSP samples were taken every six
days. 1-hour TSP samples were taken three times a day between
0700-1900 hours. The weighing of the
filter paper used in the monitoring was undertaken by ALS Laboratory Group
Environmental Division. (HOKLAS Registration No.: 066)
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 C.
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
|
|
AZ
Instrument
|
AZ Instrument 8908
|
Thermo-anemometer
|
Noise level measurements
were recorded in terms of thirty minutes A-weighted equivalent continuous sound
pressure level (Leq(30min)) on a weekly 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 Tables 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 81μg/m3 and 120μg/m3 respectively with an average of 101μg/m3. The minimum and maximum 24-hour TSP measured was 56μg/m3 and 73μg/m3 respectively
with an average of 67μg/m3. Summary of air quality
monitoring record is provided in Appendices D and E.
Table 7 1-Hour
TSP Monitoring Results
|
Date
|
1-hr TSP (μg/m3)
|
Average
(μg/m3)
|
|
Reading 1
|
Reading 2
|
Reading 3
|
Average
|
|
2nd November 2010
|
110
|
119
|
81
|
103
|
101
|
|
8th November 2010
|
92
|
102
|
95
|
96
|
|
13th November 2010
|
113
|
95
|
89
|
99
|
|
19th November 2010
|
116
|
119
|
120
|
118
|
|
25th November 2010
|
83
|
96
|
81
|
87
|
Table 8 24-Hour
TSP Monitoring Results
|
Date
|
24-hr TSP (μg/m3)
|
|
2nd November 2010
|
56
|
|
8th November 2010
|
69
|
|
13th November 2010
|
73
|
|
19th November 2010
|
70
|
|
25th November 2010
|
68
|
|
Average
|
67
|
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(30min)
and L90(30min) represent sound levels that are exceeded 10% and 90%
of the time respectively. Normally, L10(30min) measurements
can be considered as the average peak levels, whilst L90(30min)
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 60.7dB(A) Leq(30min)
and 61.2dB(A)
Leq(30min) respectively with an average of 60.9dB(A) Leq(30min).
No exceedance was recorded in this reporting period. Summary of noise monitoring record will be
provided in Appendix F.
Table 9 Noise
Monitoring Results
|
Date
|
L10(30mins) (dB(A))
|
L90(30mins) (dB(A))
|
Leq (30mins) (dB(A))
|
|
2nd November 2010
|
62.7
|
58.0
|
60.9
|
|
8th November 2010
|
62.9
|
58.1
|
60.7
|
|
13th November 2010
|
63.9
|
58.7
|
61.2
|
|
19th November 2010
|
63.1
|
58.2
|
61.1
|
|
25th November 2010
|
62.2
|
57.9
|
60.7
|
|
Average
|
63.0
|
58.2
|
60.9
|
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 G.
Table 10 Summary of
Weather Conditions during the Monitoring Period
|
Date
|
Weather
|
Prevailing
Wind direction
|
Daily Average
Wind speed (m/s)
|
|
2nd November 2010
|
Sunny
|
N
|
2.10
|
|
8th November 2010
|
Sunny
|
NE
|
1.85
|
|
13th November 2010
|
Sunny
|
N
|
2.31
|
|
19th November 2010
|
Sunny
|
Maintenance*
|
Maintenance*
|
|
25th November 2010
|
Sunny
|
N
|
2.19
|
Remarks: *The HKO Tuen Mun automatic weather
station is under maintenance on that day.
4 site
inspections were conducted by the Environmental Team (ET) in this reporting period.
Major observations by the ET, actions by the Contractor and outcome are
summarized in the Table 11.
Table 11 Summary
of Site Inspections
|
Date
|
Observations
|
Action
taken by Contractor
|
Outcome
|
|
5th November 2010
|
No observations during inspection.
|
Contractor was required to keep up with the
mitigation measures.
|
Nil.
|
|
12th November 2010
|
No observations during inspection.
|
Contractor was required to keep up with the
mitigation measures.
|
Nil.
|
|
19th November 2010
|
No observations during inspection.
|
Contractor was required to keep up with the
mitigation measures.
|
Nil.
|
|
26th November 2010
|
No observations during inspection.
|
Contractor was required to keep up with the
mitigation measures.
|
Nil.
|
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 H.
8. Non-compliance,
Complaints, Notifications of Summons and Successful Prosecutions
In this reporting period, there was no updated
status from EPD regarding the use of powered mechanical equipment, for the
purpose of carrying out construction work other than percussive piling in
respect of which a construction noise permit was not in force on 16th May 2010 at Joint-User
complex and Wholesale Fish Market in Area 44, Tuen Mun, New Territories.
No other complaint, inspection notice,
notification of summons or prosecution was received.
In the reporting month, a
total of 15.7 tonnes of inert C&D material was disposed of at public fill. A
total of 7.08 tonnes of waste including general refuse and non-inert C&D
wastes such as timber and bamboo were 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 November 2010 to 30th November 2010.
The average 1-hour
TSP level is 101μg/m3 and average 24-hour TSP level is 67μg/m3. For impact noise monitoring, the average Leq(30min) is 60.9dB(A). All monitoring results complied with the
relevant action and limit levels.
In this reporting period, there was no updated
status from EPD regarding the use of powered mechanical equipment, for the
purpose of carrying out construction work other than percussive piling in
respect of which a construction noise permit was not in force on 16th May 2010 at Joint-User
complex and Wholesale Fish Market in Area 44, Tuen Mun, New Territories.
No other complaint, inspection notice,
notification of summons or prosecution was received.
Author:
