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-fourth monthly
EM&A report, which detailed the
environmental monitoring and audit results recorded during the period from 1st
July 2010 to 31st July 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, 14th, 20th, 26th
and 31st July 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 75μg/m3 to 122μg/m3 with an average of 108μg/m3. 24-hour TSP monitoring
results ranged from 60μg/m3 to 73μg/m3 with an average of 63μg/m3.
Noise monitoring results at the monitoring
location ranged from 60.2dB(A) to 62.7dB(A)
with an average of 61.4dB(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 follow-up action
from EPD regarding the
non-compliance recorded on 16th May 2010 during site inspection of
the EPD.
No other complaint,
inspection notice, notification of summons or prosecution was received.
Construction activities will be undertaken in August 2010
include internal and external
finishing works, external landscape works, installation of Kalzip
Roof, installation of metal works, installation of carpentery
& joinery works, second
and/ or final fixing of E&M works, last manhole connection works & reinstatement of
pavement (XP works along Wu Shan Road), dismantling of hoarding and installation of Ice/ Cold Store.
Potential
environmental impacts include dust generation from stockpiles of dusty
materials, concrete works and the internal finishes; noise from operation of the equipments, runoff from concrete works,
drainage works 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:
-
Internal and external finishing works;
-
External landscape works;
-
Installation of Kalzip
Roof;
-
Installation of metal works;
-
Installation of carpentery
& joinery works;
-
Second and/ or final fixing of E&M works;
-
Last manhole connection works & reinstatement
of pavement (XP works along Wu Shan Road);
-
Installation of fender;
-
Rebar fixing, erection of formwork & concreting
to minor RC structure;
-
Dismantling of hoarding;
-
Dismantling of bamboo scaffolding;
-
Installation of Spectator Stand seating;
-
Installation of jib crane, and
-
Installation of Ice/ Cold Store.
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
|
|
Concrete
works
|
Air, noise
and water quality impacts
|
Well-maintained
plants were used and waste water were reused when practicable, cement bags
were properly covered and use indoors as practicable
|
|
E&M
services
|
Water
quality impacts
|
Waste
water were reused when practicable
|
|
Internal
& external finishes, dismantling works 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, 14th, 20th, 26th
and 31st July 2010. The air quality monitoring and noise monitoring for
August 2010 will be scheduled on 6th, 12th, 18th,
24th and 30th August 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
|
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 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 75μg/m3 and 122μg/m3 respectively
with an average of 108μg/m3. The minimum and maximum 24-hour
TSP measured was 60μg/m3 and 73μg/m3 respectively
with an average of 63μg/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 July 2010
|
136
|
134
|
101
|
124
|
108
|
|
8th July 2010
|
92
|
106
|
109
|
102
|
|
14th July 2010
|
117
|
112
|
98
|
109
|
|
20th July 2010
|
115
|
85
|
75
|
92
|
|
26th July 2010
|
117
|
122
|
114
|
118
|
|
31st
July 2010
|
91
|
112
|
109
|
104
|
Table 8 24-Hour
TSP Monitoring Results
|
Date
|
24-hr TSP (μg/m3)
|
|
2nd July 2010
|
73
|
|
8th July 2010
|
53
|
|
14th July 2010
|
61
|
|
20th July 2010
|
57
|
|
26th July 2010
|
75
|
|
31st
July 2010
|
61
|
|
Average
|
63
|
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 60.2dB(A) Leq(30min)
and 62.7dB(A)
Leq(30min) respectively with an average of 61.4dB(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 July 2010
|
62.7
|
59.6
|
61.7
|
|
8th July 2010
|
63.7
|
59.8
|
61.2
|
|
14th July 2010
|
63.7
|
59.7
|
61.2
|
|
20th July 2010
|
62.7
|
57.2
|
60.2
|
|
26th July 2010
|
63.9
|
60.2
|
62.7
|
|
31st July 2010
|
62.9
|
58.9
|
61.7
|
|
Average
|
63.4
|
59.2
|
61.4
|
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 July 2010
|
Sunny
|
S
|
2.13
|
|
8th July 2010
|
Sunny
|
S
|
2.97
|
|
14th July 2010
|
Sunny
|
SE
|
2.14
|
|
20th July 2010
|
Sunny
|
SE
|
2.74
|
|
26th July 2010
|
Sunny
|
SE
|
2.52
|
|
31st
July 2010
|
Sunny
|
SE
|
3.45
|
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
|
|
2nd July 2010
|
Stockpiles
of sand were not properly covered.
|
Contractor
was requested to provide covering.
|
Covering
was given to the stockpiles of sand.
|
|
9th July 2010
|
Haul road
appeared dry.
|
Contractor
was requested to increase the frequency of watering.
|
Sufficient
water spraying was given to dry haul road.
|
|
16th July 2010
|
No observations during inspection.
|
Contractor was required to keep up with the
mitigation measures.
|
Nil.
|
|
23rd July 2010
|
No observations during inspection.
|
Contractor was required to keep up with the
mitigation measures.
|
Nil.
|
|
30th
July 2010
|
No
watering was provided during breaking of road pavement.
|
Contractor
was requested to watering during the progress.
|
Sufficient water spraying was
given.
|
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 follow-up
action from EPD regarding the
non-compliance recorded on 16th May 2010 during site inspection of
the EPD.
No other complaint, inspection notice,
notification of summons or prosecution was received.
A total of 1,094.7 tonnes of
inert C&D material was disposed of at public fill. A total of 149.5 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 July 2010 to 31st July 2010.
The average 1-hour
TSP level is 108μg/m3 and average 24-hour TSP level is 63μg/m3. For impact noise monitoring, the average Leq(30min)
is 61.4dB(A). All monitoring
results complied with the relevant action and limit levels.
In this reporting period, there was no follow-up
action from EPD regarding the
non-compliance recorded on 16th May 2010 during site inspection of
the EPD.
No other complaint, inspection notice,
notification of summons or prosecution was received.
Author:
