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 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 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
Figure 6 Photos
of the Construction Site for the Junior Police Officers’ Married Quarters
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 twelfth monthly EM&A report, which
detailed the environmental monitoring
and audit results recorded during the period from 1st July 2009 to 31st
July 2009.
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, 25th and 31st July 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 135μg/m3 to 185μg/m3
with an average of 165μg/m3. 24-hour TSP monitoring
results ranged from 72μg/m3 to 82μg/m3 with an average of 77μg/m3.
Noise monitoring
results at the monitoring location ranged from 61.2dB(A) to 63.9dB(A) with an average of 62.7dB(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 August 2009 include
construction of formwork and rebar fixing for superstructure from G/F to M/F
and G/F to 1/F, underground services installation, concreting to
superstructure, installation of conceal E&M services conduit and
construction of ground structure slab. 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 concrete 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:
-
Construction of
superstructure (wall/ column/ slab) from G/F to M/F, G/F to 1/F;
-
Installation of
concealed E&M conduit to wall/ slab;
-
U/G drainage works;
-
Manhole connection work;
and
-
Construction of G/F
on-grade slab.
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
|
|
Superstructure
|
Noise and water quality impacts
|
Well-maintained plants were used, waste
water were reused when practicable
|
|
Concrete works
|
Noise and water quality impacts
|
Well-maintained plants were used, waste
water were reused when practicable
|
|
On-grade slab
|
Noise and water quality impacts
|
Well-maintained plants were used, waste
water were reused when practicable
|
|
Underground drainage works
|
Water quality impacts
|
Waste water were reused when practicable
|
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,
25th and 31st July 2009. The
air quality monitoring and noise
monitoring for July will be
scheduled on 6th, 12th, 18th, 24th
and 29th August 2009.
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 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 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
will be undertaken by ASL Laboratory Group Environmental Division.
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 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 135μg/m3 and 185μg/m3 respectively with an average of 165μg/m3. The minimum and maximum 24-hour TSP measured was 72μg/m3 and 82μg/m3 respectively with an
average of 77μg/m3. Summary of air quality
monitoring record is provided in Appendix D and
E.
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
|
2 Jul 2009
|
158
|
161
|
161
|
160
|
165
|
|
2
|
8 Jul 2009
|
143
|
163
|
180
|
162
|
|
3
|
14 Jul 2009
|
171
|
175
|
181
|
176
|
|
4
|
20 Jul 2009
|
151
|
175
|
177
|
168
|
|
5
|
25
Jul 2009
|
135
|
159
|
165
|
153
|
|
6
|
31 Jul
2009
|
151
|
185
|
184
|
173
|
Table 8 24-Hour
TSP Monitoring Results
|
Day
|
Date
|
24-hr TSP (μg/m3)
|
|
1
|
2 Jul 2009
|
75
|
|
2
|
8 Jul 2009
|
81
|
|
3
|
14 Jul 2009
|
72
|
|
4
|
20 Jul 2009
|
78
|
|
5
|
25
Jul 2009
|
74
|
|
6
|
31 Jul 2009
|
82
|
|
|
Average
|
77
|
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 63.9dB(A) Leq(30min) respectively with an
average of 62.7dB(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
|
Day
|
Date
|
L10(30mins) (dB(A))
|
L90(30mins) (dB(A))
|
Leq(30mins) (dB(A))
|
|
1
|
2 Jul 2009
|
65.2
|
59.6
|
63.7
|
|
2
|
8 Jul 2009
|
66.1
|
59.2
|
63.9
|
|
3
|
14 Jul 2009
|
63.5
|
59.2
|
61.9
|
|
4
|
20 Jul 2009
|
63.7
|
58.9
|
61.2
|
|
5
|
25
Jul 2009
|
65.3
|
59.9
|
62.7
|
|
6
|
31 Jul 2009
|
65.1
|
59.2
|
62.7
|
|
|
Average
|
64.8
|
59.3
|
62.7
|
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)
|
|
2 Jul 2009
|
Sunny
|
SW
|
3.30
|
|
8 Jul 2009
|
Sunny
|
SE
|
2.21
|
|
14 Jul 2009
|
Cloudy
|
S
|
2.80
|
|
20 Jul 2009
|
Cloudy
|
SE
|
4.23
|
|
25
Jul 2009
|
Cloudy
|
SE
|
2.98
|
|
31 Jul 2009
|
Cloudy
|
SE
|
3.16
|
5 site inspections were conducted by the
Environmental Team (ET) in this reported 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
|
|
1
|
2 Jul 2009
|
The stockpile of dusty materials was
found dry.
|
Contractor was
requested to increase the frequency of watering and compact the
stockpile properly.
|
The situation was rectified after work
immediately.
|
|
2
|
9 Jul 2009
|
Oil drums were placed on bare ground.
|
Contractor was
requested to provide drip trays for the oil drums.
|
The situation
was rectified.
|
|
3
|
16 Jul 2009
|
Oil drums were placed on bare ground.
|
Contractor was
requested to provide drip trays for the oil drums.
|
The situation
was rectified.
|
|
4
|
24 Jul 2009
|
No outstanding observations during
inspection.
|
Contractor was
required to keep up with the mitigation measures.
|
|
|
5
|
31 Jul 2009
|
Oil drums were placed on bare ground.
|
Contractor was
requested to provide drip trays for the oil drums.
|
The situation
was rectified.
|
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, no complaint,
inspection notice, notification of summons or prosecution was received. No non-compliance was recorded.
599.5 m3 of inert C&D waste was
disposed of at public fill. 18.06 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 July 2009 to 31st
July 2009.
The average 1-hour TSP level is 165μg/m3 and average 24-hour
TSP level is 77μg/m3. For impact noise monitoring, the Average Leq(30min) is 62.7dB(A). All monitoring results complied with the relevant action and limit
levels.
Author:
