EXECUTIVE SUMMARY
The Project “Development at Anderson
Road – Site Formation and Associated
Infrastructure Works”
(hereafter called “the Project”) is proposed to form platforms for
housing development and associated
uses in area of about 20 hectares, and to carry out necessary
infrastructural upgrading or improvement works to
cater for the proposed development.
China State Construction Engineering (Hong Kong)
Limited (CSCE) was commissioned as the Contractor of the
Project. AECOM Asia Co. Ltd. (AECOM) was employed by CSCE as
the Environmental Team (ET) to undertake the Environmental Monitoring and Audit (EM&A) works for the
Project.
The impact EM&A for the Project includes air quality and noise
monitoring. The EM&A programme for Sau Ming Primary School (ID 4) and Sau
Mau Ping Catholic Primary School (ID 5) commenced on 1 May 2008, while for Kwun
Tong Government Secondary School (ID 1A),
On Yat House (ID 2) and Sau Nga House (ID 3) commenced on 1 June 2008.
The monitoring stations ID 4 & ID 5 will serve both the entire
Development of Anderson Road
(Schedule 3 Designated Project (DP)) project as well as the Widening of
Po Lam Road (Schedule 2 DP) project.
The construction for the Widening of Po Lam Road (Schedule 2 DP)
project was commenced on 21
September 2011.
This report documents the findings of EM&A
works for ID 1A, ID
2, ID 3, ID 4 and ID 5 conducted in the period between 1 and 31 January
2014. As informed by the
Contractor, construction activities in the reporting period were:-
l Site
clearance
l Establishment
of temporary access road and temporary drainage
l Condition
survey
l Slope
stabilization and upgrading works
l Tree
transplanting and protection
l Excavation
work at portions A, B, C, J4, S1a,
S1b, S2a, S2b, J1a
l Ground
investigation and instrumentation
l Trial
pit excavation
l Temporary
traffic arrangement and road work at J/O Po Lam Road & Sau Mau Ping Road,
Sau Fung Street, J2
l Bridge
prestressing work
l Toe
/ Berm planter and platform drainage construction
l Maintenance
Work
l Bridge
structural works at Bridge A, B and D
l Retaining
wall structural works
l Blasting
l Trench
excavation and pipe laying
l Erection
and maintenance of Blasting Cages & Fencing
l RE
wall panel installation and backfilling
l Permanent
backfilling at portion S1c and S1a (former temple area)
l Erection
and maintenance of hoarding
l Box
culvert construction
l Construction
of pedestrian subway
l Erection
of panel wall at R15
l Stormwater
tank construction
l Box
culvert construction
l Excavation
of footbridge A, B,C
l Mini-pile
construction of footbridge
l Structural
works at Footbridge A, B and C
l Pipe
Jacking at Hiu Kwong Street
Breaches of Action and Limit
Levels for Air Quality
All 1-Hour TSP results were below the Action
and Limit Level in the reporting month. Three (3) exceedances of Action Level
and one (1) exceedance of Limit Level were recorded in 20 January 2014 for
24-hour TSP monitoring at ID2, 3, 4 and 5 respectively. Exceedances were not
related to project.
Breaches of Action and Limit
Levels for Noise
According to the information provided by the
Contractor, no Action Level exceedance was recorded since no noise related
complaint was received in the reporting month.
No exceedance of Limit
Level of noise was recorded in the reporting month.
Complaint, Notification of
Summons and Successful Prosecution
According to the information provided by the Contractor on 17 February 2014, dust related complaint
which dated on 30 December 2013 was confirmed to be recorded as enquiry. The
cumulative statistics on complaints is updated in Appendix J.
No environmental complaint and no notification of summons and successful prosecution were received in the reporting month.
Reporting Changes
There was no reporting
change in the reporting month.
Future Key Issues
Key issues to be considered in the coming month
included:-
-
Properly store and label oil drums and chemical
containers placed on site;
-
Proper chemicals, chemical wastes and wastes
management;
-
Maintenance works should be carried out within
roofed, paved areas with proper drainage system to handle run-off from
maintenance works;
-
Collection and segregation of construction waste
and general refuse should be carried out properly and regularly;
-
Site runoff should be properly collected and
treated prior to discharge;
-
Regular review and maintenance of drainage
systems and desilting facilities;
-
Exposed slopes/soil stockpiles should be properly
treated to avoid generation of silty surface run-off during rainstorm;
-
Proper mitigation measures should be provided to
avoid relocation of treated contaminated soil;
-
Regular review and maintenance of wheel washing
facilities provided at all site entrances/exits;
-
Suppress dust generated from work processes with
use of bagged cements, earth movements, drilling works, breaking works,
excavation activities, exposed areas/slopes/soil stockpiles and haul road
traffic;
-
Conduct regular inspection of the working
machineries within works area to avoid any dark smoke emission and oil leakage;
-
Quieter powered mechanical equipment should be
used;
-
Provision of proper and effective noise control
measures, such as erection of movable noise barriers during blasting, breaking
and drilling works and at crushing plant works area and provision of acoustic
material wrapping to breaking tips of breakers; and
-
Proper protection and regular inspection of
existing trees, transplanted/retained trees.
1 introduction
1.1.1
The
Project site is located in the East Kowloon District. It is bounded by Anderson Road to
the north, the realigned Sau Mau Ping Road to the south, Po Lam Road to the
east, and Lee On Road and Shun On Road to
the west.
1.1.2
The
objective of the Project “Development at Anderson Road Site Formation and
Associated Infrastructure Works”
under Contract CV/2007/03 (hereafter called “the Project”) is to provide land
for constructing public housing and government and
public facilities. The development will provide 16,100 public housing units for 48,000 people in phases
between 2015 and 2016.
1.1.3
The scope
of works of this Project includes construction of site formation, roads, drains
and upgrading of existing infrastructure to provide
usable land of about 20 hectares for housing and
associated government, institution or community uses at the site between
existing
Anderson Road Quarry and Sau Mau Ping Road
in Kwun Tong District.
1.1.4
The
Project is anticipated to complete in mid 2015.
1.1.5
Part of the
Project involving widening of existing Po Lam Road is a designated project and
is governed by an Environmental Permit (EP)
EP-140/2002, while the rest of the Project is non-designated.
Baseline monitoring covering the entire Project site was undertaken and baseline monitoring report was prepared prior
to commencement of construction of the Project in
accordance with Conditions 3.2 and 3.4 of the EP (EP-140/2002) and the Environmental
Monitoring and Audit (EM&A) Manual.
The construction for the Widening of Po Lam
Road was commenced on 21 September 2011.
1.1.6 According to the EP and the EM&A Manual of
the Project, there is a need of an EM&A programme including air quality and
noise monitoring.
1.1.7
The
EM&A programme for Sau Ming Primary School (ID 4) and Sau Mau Ping Catholic
Primary School (ID 5) commenced on 1 May 2008, while for Kwun Tong Government
Secondary School (ID 1A), On
Yat House (ID 2) and Sau Nga House (ID 3) commenced on 1 June 2008.
1.1.8
The monitoring stations ID 4 & ID 5 will serve both the entire
Development of Anderson Road (Schedule 3 Designated Project (DP)) project as
well as the Widening of Po Lam Road. (Schedule 2 DP)
project.
1.1.9 AECOM Asia Co. Ltd.
(AECOM) was employed by the
Contractor, China State Construction Engineering (Hong Kong) Limited (CSCE), as
the Environmental Team (ET) to undertake the EM&A works for the Project. In accordance with the EM&A Manual of the
Project, environmental monitoring of air quality, noise and environmental site
inspections would be required for this Project.
1.2
Scope of Report
1.2.1 This is the sixty-eighth monthly EM&A
Report under the Contract CV/2007/03 - Development at Anderson Road – Site
Formation and Associated Infrastructure Works. This report presents a summary
of the environmental monitoring and audit works, list of activities and
mitigation measures proposed by the ET for the Project in January
2014
for ID 1A, ID 2, ID 3, ID 4
and ID 5.
1.3
Project Organization
1.3.1
The
project organization structure is shown in Appendix A. The key personnel
contact names and numbers are summarized in Table 1.1.
Table
1.1 Contact Information of Key
Personnel
|
Party
|
Position
|
Name
|
Telephone
|
Fax
|
|
ER (Ove
Arup)
|
Chief Resident Engineer
|
Dennis Leung
|
3656 3000
|
3656 3100
|
|
Senior Resident
Engineer
|
Michael Wright
|
3656 3000
|
3656 3100
|
|
Resident Engineer
(Safety and Environmental)
|
Kenneth Lee
|
3656 3000
|
3656 3100
|
|
IEC (ENVIRON)
|
Independent Environmental Checker
|
David Yeung
|
3465 2888
|
3465 2899
|
|
Contractor
(CSCE)
|
Site Agent
|
Wilson Lau
|
2704 2095
|
2702 6553
|
|
Environmental Manager
|
Leo Chung
|
2704 2095
|
2702 6553
|
|
ET (AECOM)
|
ET Leader
|
Yiu Wah Fung
|
3922 9366
|
2317 7609
|
1.4.1
As informed by the Contractor, the Contactor has carried out the following major activities in the reporting month:-
l Site
clearance
l Establishment
of temporary access road and temporary drainage
l Condition
survey
l Slope
stabilization and upgrading works
l Tree
transplanting and protection
l Excavation
work at portions A, B, C, J4, S1a,
S1b, S2a, S2b, J1a
l Ground
investigation and instrumentation
l Trial
pit excavation
l Temporary
traffic arrangement and road work at J/O Po Lam Road & Sau Mau Ping Road,
Sau Fung Street, J2
l Bridge
prestressing work
l Toe
/ Berm planter and platform drainage construction
l Maintenance
Work
l Bridge
structural works at Bridge A, B and D
l Retaining
wall structural works
l Blasting
l Trench
excavation and pipe laying
l Erection
and maintenance of Blasting Cages & Fencing
l RE
wall panel installation and backfilling
l Permanent
backfilling at portion S1c and S1a (former temple area)
l Erection
and maintenance of hoarding
l Box
culvert construction
l Construction
of pedestrian subway
l Erection
of panel wall at R15
l Stormwater
tank construction
l Box
culvert construction
l Excavation
of footbridge A, B,C
l Mini-pile
construction of footbridge
l Structural
works at Footbridge A, B and C
l Pipe
Jacking at Hiu Kwong Street.
1.4.2
The
general layout plan of the Project site showing the contract area is shown in
Figure 1.1.
1.4.3 The environmental mitigation measures
implementation schedule are presented in Appendix B.
1.5.1
The
EM&A programme required environmental monitoring for air quality, noise and
environmental site inspections for air quality, noise, water quality, chemical
and waste management. The EM&A requirements for each parameter described in
the following sections include:-
- All monitoring parameters;
- Monitoring schedules for the reporting month and
forthcoming months;
- Action and Limit levels for all environmental
parameters;
- Event / Action Plan;
- Environmental mitigation measures, as recommended in
the Project EIA study final report; and
- Environmental requirement in contract documents.
2
AIR QUALITY MONITORING
2.1.1
In accordance with the EM&A Manual, 1-hour and 24-hour TSP levels at
5 air quality monitoring stations were established. Impact
1-hour TSP monitoring was conducted for at least three times every 6 days,
while impact 24-hour TSP monitoring was carried out for at least once every 6
days. The Action and Limit level of the air quality monitoring is provided in
Appendix C.
2.2.1
24-hour TSP air quality
monitoring was performed using High Volume Sampler (HVS) located at each
designated monitoring station. The HVS meets all the requirements of the
EM&A Manual. Portable direct reading dust meters were used to carry out the
1-hour TSP monitoring. Brand and model of the equipment is given in Table 2.1.
Table
2.1 Air Quality Monitoring Equipment
|
Equipment
|
Brand and Model
|
|
Portable direct
reading dust meter (1-hour TSP)
|
Sibata Digital Dust
Monitor (Model No. LD-3 and LD-3B)
|
|
High Volume Sampler
(24-hour TSP)
|
Tisch Total
Suspended Particulate Mass Flow Controlled High Volume Air Sampler (Model No.
TE-5170 & GMW-2310)
|
2.3.1 Monitoring stations,
ID 2, ID 3, ID 4 and ID 5, were set up at the proposed locations in accordance
with EM&A Manual, while monitoring station, ID 1A, was set up at a location agreed by the ER and IEC.
Figure 2.1 shows the locations of the monitoring stations. Table 2.2 describes
the details of the monitoring stations.
Table 2.2 Locations of Air Quality Monitoring
Stations
|
ID
|
Location
|
Monitoring Station
|
|
1A
|
Kwun Tong Government
Secondary School
|
Roof top of the premises
facing Anderson Road
|
|
2
|
On Yat House
|
Roof top of the
premises facing Lee On Road
|
|
3
|
Sau Nga House
|
Roof top of the premises facing Sau Mau Ping Road
|
|
4
|
Sau Ming Primary
School
|
Roof top of the premises
|
|
5
|
Sau Mau Ping
Catholic Primary
School
|
Roof top of the premises
|
2.4.1
Table 2.3 summarizes the
monitoring parameters, frequency and duration of impact TSP monitoring.
Table 2.3 Air Quality Monitoring Parameters,
Frequency and Duration
|
Monitoring Station
|
Parameter
|
Frequency and Duration
|
|
ID 1A,
ID 2, ID 3, ID 4 & ID5
|
1-hour TSP
|
At least 3 times every 6 days
|
|
24-hour TSP
|
At least once every 6 days
|
2.5.1 24-hour TSP
Monitoring
(a)
The HVS was installed in
the vicinity of the air sensitive receivers.
The following criteria were considered in the installation of the HVS:-
(i)
A horizontal platform with appropriate
support to secure the sampler against gusty wind was provided.
(ii)
The distance between the HVS and any
obstacles, such as buildings, was at least twice the height that the obstacle
protrudes above the HVS.
(iii)
A minimum of 2 meters separation from walls,
parapets and penthouse for rooftop sampler.
(iv)
A minimum of 2 meters separation from any
supporting structure, measured horizontally is required.
(v)
No furnace or incinerator flues nearby.
(vi)
Airflow around the sampler was unrestricted.
(vii)
Permission was obtained to set up the
samplers and access to the monitoring stations.
(viii)
A secured supply of electricity was obtained
to operate the samplers.
(ix)
The sampler was located more than 20 meters
from any dripline.
(x)
Any wire fence and gate, required to protect
the sampler, did not obstruct the monitoring process.
(xi)
Flow control accuracy was kept within ±2.5%
deviation over 24-hour sampling period.
(b)
Preparation of Filter
Papers
(i)
Glass fibre filters, G810 were labelled and
sufficient filters that were clean and without pinholes were selected.
(ii)
All filters were equilibrated in the
conditioning environment for 24 hours before weighing. The conditioning
environment temperature was around 25
°C and not variable by more than ±3 °C; the relative humidity (RH) was < 50% and not
variable by more than ±5%. A convenient working RH was 40%.
(iii)
All filter papers were prepared and analysed
by ALS Technichem (HK) Pty Ltd., which is a HOKLAS
accredited laboratory and has comprehensive quality assurance and
quality control programmes.
(c)
Field Monitoring
(i)
The power supply
was checked to ensure the HVS works properly.
(ii)
The filter holder and the area surrounding
the filter were cleaned.
(iii)
The filter holder was removed by loosening
the four bolts and a new filter, with stamped number upward, on a supporting
screen was aligned carefully.
(iv)
The filter was properly aligned on the screen
so that the gasket formed an airtight seal on the outer edges of the filter.
(v)
The swing bolts were fastened to hold the
filter holder down to the frame. The
pressure applied was sufficient to avoid air leakage at the edges.
(vi)
Then the shelter lid was closed and was
secured with the aluminium strip.
(vii)
The HVS was warmed-up for about 5 minutes to
establish run-temperature conditions.
(viii)
A new flow rate record sheet was set into the
flow recorder.
(ix)
On site temperature and atmospheric pressure
readings were taken and the flow rate of the HVS was checked and adjusted at
around 1.3 m3/min,
and complied with the range specified in the EM&A Manual (i.e. 0.6-1.7 m3/min).
(x)
The programmable digital timer was set for a
sampling period of 24 hrs, and the starting time, weather condition and the
filter number were recorded.
(xi)
The initial elapsed time was recorded.
(xii)
At the end of sampling, on site temperature
and atmospheric pressure readings were taken and the final flow rate of the HVS
was checked and recorded.
(xiii)
The final elapsed time was recorded.
(xiv)
The sampled filter was removed carefully and folded
in half length so that only surfaces with collected particulate matter were in
contact.
(xv)
It was then placed in a clean plastic
envelope and sealed.
(xvi)
All monitoring information was recorded on a
standard data sheet.
(xvii)
Filters were then sent to ALS Technichem (HK) Pty Ltd. for analysis.
(d)
Maintenance and Calibration
(i)
The HVS and
its accessories were maintained in good working condition, such as replacing
motor brushes routinely and checking electrical wiring to ensure a continuous
power supply.
(ii)
HVSs were calibrated using TE-5025A Calibration Kit upon installation
and thereafter at bi-monthly intervals.
(iii)
Calibration certificate of the TE-5025A Calibration Kit and
the HVSs are provided in Appendix D.
2.5.2 1-hour TSP
Monitoring
(a)
Measuring Procedures
The measuring procedures of the 1-hour dust
meter were in accordance with the Manufacturer’s Instruction Manual as
follows:-
(i)
Turn the power on.
(ii)
Close the air collecting opening cover.
(iii)
Push the “TIME SETTING” switch to [BG].
(iv)
Push “START/STOP”
switch to perform background measurement for 6 seconds.
(v)
Turn the knob at SENSI ADJ position to insert
the light scattering plate.
(vi)
Leave the equipment for 1 minute upon “SPAN
CHECK” is indicated in the display.
(vii)
Push “START/STOP” switch to perform automatic
sensitivity adjustment. This measurement takes 1 minute.
(viii)
Pull out the knob and return it to MEASURE
position.
(ix)
Push the “TIME SETTING” switch the time set
in the display to 3 hours.
(x)
Lower down the air collection opening cover.
(xi)
Push “START/STOP” switch to start measurement.
(b)
Maintenance and Calibration
(i)
The 1-hour TSP meter was
calibrated at 1-year intervals against a continuous particulate TEOM Monitor,
Series 1400ab. Calibration certificates of the Laser Dust Monitors are provided in Appendix D.
2.6.1
The
schedule for environmental
monitoring in January 2014 is provided in Appendix E.
2.7.1 The monitoring
results for 1-hour TSP and 24-hour TSP are summarized in Tables 2.4 and 2.5 respectively. Detailed air quality monitoring results are
presented in Appendix F.
Table 2.4 Summary of 1-hour TSP Monitoring Results in
the Reporting Period
|
|
Average (mg/m3)
|
Range (mg/m3)
|
Action Level (mg/m3)
|
Limit Level (mg/m3)
|
|
ID 1A
|
81.7
|
73.6 – 90.3
|
201.5
|
500
|
|
ID 2
|
82.2
|
73.9 – 90.0
|
197.0
|
500
|
|
ID 3
|
81.9
|
74.9 – 89.3
|
203.7
|
500
|
|
ID 4
|
82.1
|
75.5 – 90.5
|
264.6
|
500
|
|
ID 5
|
82.5
|
74.9 – 90.3
|
267.4
|
500
|
Table 2.5 Summary of 24-hour TSP Monitoring
Results in the Reporting Period
|
|
Average (mg/m3)
|
Range (mg/m3)
|
Action Level (mg/m3)
|
Limit Level (mg/m3)
|
|
ID 1A
|
44.6
|
30.9 – 69.9
|
170.2
|
260
|
|
ID 2
|
88.0
|
41.5 – 209.2
|
200.0
|
260
|
|
ID 3
|
112.2
|
52.0 – 282.6
|
200.0
|
260
|
|
ID 4
|
104.0
|
55.4 – 213.6
|
181.3
|
260
|
|
ID 5
|
84.8
|
26.4 – 237.6
|
180.8
|
260
|
2.7.2
All 1-Hour
TSP results were below the Action and Limit Level in the reporting month. Three
(3) exceedances of Action Level and one (1) exceedance of Limit Level were
recorded in 20 January 2014 for 24-hour TSP monitoring at ID2, 3, 4 and 5
respectively. Exceedances were not related to project.
2.7.3
For the
24Hr TSP Action Level exceedances recorded at ID2, 4 and 5, results of 209.2mg/m3, 213.6mg/m3 and 237.6mg/m3 were recorded on 20 January 2014 (24-hr
TSP).
2.7.4
According
to information provided by the Contractor, concreting, installation of
formwork, excavation and drainage works were the major construction activities
being undertaken within works area of the Project during the monitoring period.
2.7.5
Dust
mitigation measures have been implemented by the Contractor as listed below:-
1.
Main haul road were regularly watering by water
trucks to maintain the surface wet;
2.
Continuous water spraying and tarpaulin sheet
coverage was applied during excavation;
3.
Exposed slope surface should be either hydroseeded,
shotcreted or covered up by tarpaulin;
4.
Vehicle washing facility was provided at vehicle
exit points, and vehicle was washed to remove any dusty materials from its body
and wheels before leaving.
2.7.6
Very close
to the monitoring locations, there were contracts carrying out concrete mixing,
excavation, rock breaking, pilling and drilling works at Portions A, B, C, D
and Footbridge D in the works area
during the course of monitoring.
These works may probably contribute to the measured dust level at the
Stations.
2.7.7
The dust
exceedance was therefore considered not to be due to the Project works.
2.7.8
For the
24Hr TSP Limit Level exceedance recorded at ID3, a result of 282.6mg/m3, was recorded on 20 January 2014 (24-hr
TSP).
2.7.9
According
to information provided by the Contractor, concreting, installation of
formwork, excavation and drainage works were the major construction activities
being undertaken within works area of the Project during the monitoring period.
2.7.10
Dust
mitigation measures have been implemented by the Contractor as listed below:-
1.
Main haul road were regularly watering by water
trucks to maintain the surface wet;
2.
Continuous water spraying and tarpaulin sheet
coverage was applied during excavation;
3.
Exposed slope surface should be either hydroseeded,
shotcreted or covered up by tarpaulin;
4.
Vehicle washing facility was provided at vehicle
exit points, and vehicle was washed to remove any dusty materials from its body
and wheels before leaving.
2.7.11
Very close
to the monitoring locations, there were contracts carrying out concrete mixing,
excavation, rock breaking and pilling works at Portion C and Footbridge D in
the works area during the course of monitoring. These works may probably
contribute to the measured dust level at the Station.
2.7.12
The dust
exceedance was therefore considered not to be due to the Project works.
2.7.13
The event
action plan is annexed in Appendix I.
2.7.14
Major dust sources during the
dust monitoring included construction dust from the Project site, construction
dust from other construction sites nearby and nearby traffic emission.
2.7.15
Weather information including wind speed and wind
direction is annexed in Appendix H. The information was obtained from Hong Kong
Observatory Tseung Kwan O Automatic Weather Station and Anemometer Station.
3
Noise MONITORING
3.1.1
In accordance with the EM&A Manual, impact
noise levels should be obtained at 5 noise monitoring stations. Impact noise
monitoring was conducted for at least once per week during the construction
phase of the Project. The Action and Limit level of the noise monitoring is
provided in Appendix C.
3.2.1
Noise monitoring was performed
using sound level meter at each designated monitoring station. The sound level meters deployed comply with
the International Electrotechnical Commission Publications (IEC) 651:1979 (Type
1) and 804:1985 (Type 1) specifications.
Acoustic calibrator was deployed to check the sound level meters at a
known sound pressure level. Brand and
model of the equipment is given in Table 3.1.
Table 3.1 Noise Monitoring Equipment
|
Equipment
|
Brand and Model
|
|
Integrated Sound Level Meter
|
Rion (Model No. NL-31) &
B&K (Model No. 2238)
|
|
Acoustic Calibrator
|
Rion (Model No. NC-73)
|
3.3.1 Monitoring stations,
ID 2, ID3, ID 4 and ID 5, were set up at the proposed locations in accordance
with EM&A Manual, while monitoring station, ID 1A, was set up at a location agreed by the ER and IEC.
Figure 2.1 shows the locations of the monitoring stations. Table 3.2 describes
the details of the monitoring stations.
Table 3.2 Locations of Impact Noise Monitoring
Stations
|
ID
|
Location
|
Monitoring Station
|
|
1A
|
Kwun Tong Government
Secondary School
|
1m from the exterior of the roof top façade of the
premises facing Anderson Road
|
|
2
|
On Yat House
|
1m from the exterior of the roof top façade of the
premises facing Lee On Road
|
|
3
|
Sau Nga House
|
1m from the exterior of the roof top façade of the premises facing Sau Mau Ping Road
|
|
4
|
Sau Ming Primary
School
|
1m from the exterior of the roof top façade of the premises facing Sau Mau Ping Road
|
|
5
|
Sau Mau Ping
Catholic Primary
School
|
1m from the exterior of the roof top façade of the premises facing Po Lam Road
|
3.4.1
Table 3.3 summarizes the
monitoring parameters, frequency and duration of impact noise monitoring.
Table 3.3 Noise
Monitoring Parameters, Frequency and Duration
|
Monitoring Station
|
Parameter and Duration
|
Frequency
|
|
ID 1A, ID
2, ID 3, ID 4 & ID5
|
30-mins measurement at each monitoring
station between 0700 and 1900 on normal weekdays. Leq, L10
and L90 would be recorded.
|
At least once per week
|
3.5.1 Monitoring Procedure
(a)
The sound level meter was set on a tripod at a height of 1.2 m above the ground.
(b)
Façade measurements were made at all
monitoring locations.
(c)
The battery condition was checked to ensure the correct functioning of the meter.
(d)
Parameters such as frequency weighting, the
time weighting and the measurement time were set as follows:
(i)
frequency weighting: A
(ii)
time weighting: Fast
(iii)
time measurement: Leq(30-minutes)
during non-restricted hours i.e. 07:00 – 1900 on normal weekdays; Leq(5-minutes)
during restricted hours i.e. 19:00 – 23:00 and 23:00 – 07:00 of normal weekdays, whole day of Sundays
and Public Holidays
(e)
Prior to and after each noise measurement,
the meter was calibrated using the acoustic calibrator for 94dB(A) at 1000
Hz. If the difference in the calibration
level before and after measurement was more than 1 dB(A), the measurement would
be considered invalid and repeat of noise measurement would be required after
re-calibration or repair of the equipment.
(f)
During the monitoring period, the Leq,
L10 and L90 were recorded. In addition, site conditions and noise
sources were recorded on a standard record sheet.
(g)
Noise measurement was paused during periods
of high intrusive noise (e.g. dog barking, helicopter noise) if possible.
Observations were recorded when intrusive noise was unavoidable.
(h)
Noise monitoring was cancelled in the
presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind with gusts exceeding 10m/s.
3.5.2 Maintenance and
Calibration
(a)
The microphone head of the sound level meter was
cleaned with soft cloth at regular intervals.
(b)
The meter and calibrator
were sent to the supplier or HOKLAS laboratory to check and calibrate at yearly
intervals.
(c)
Calibration certificates of
the sound level meters and acoustic calibrators are
provided in Appendix D.
3.6
Monitoring Schedule for the Reporting Month
3.6.1 The schedule
for environmental monitoring in January
2014
is
provided in Appendix E.
3.7
Monitoring Results
3.7.1
The monitoring results for
noise are summarized in Table 3.4 and the monitoring data is provided in
Appendix G.
Table 3.4 Summary of
Impact Noise Monitoring Results in
the Reporting Period
|
|
Average, dB(A),
Leq (30 mins)
|
Range, dB(A),
Leq (30 mins)
|
Limit Level, dB(A),
Leq (30 mins)
|
|
ID 1A
|
59.7
|
51.9 – 64.4
|
*65/70
|
|
ID 2
|
63.7
|
61.1 – 65.3
|
75
|
|
ID 3
|
63.7
|
58.2 – 67.0
|
75
|
|
ID 4
|
63.5
|
59.3 – 65.3
|
*65/70
|
|
ID 5
|
60.9
|
57.8 – 64.1
|
*65/70
|
Note:
*Daytime noise Limit Level of 70dB(A) applies to education institutions while 65dB(A) applies during school examination period.
3.7.2
According to the
information provided by the Contractor, no noise complaint was
received in the reporting month; hence, no Action Level
exceedance was recorded.
3.7.3
There is
no Limit Level exceedance of noise recorded at all monitoring stations in the
reporting month.
3.7.4
The event
action plan is annexed in Appendix I.
3.7.5
Major noise sources during the
noise monitoring included construction noise from the Project site,
construction noise from other construction sites nearby, nearby traffic
noise and noise from
school activities and community noise.
4
ENVIRONMENTAL SITE INSPECTION AND AUDIT
4.1.1 Site Inspections were carried out on a weekly
basis to monitor the implementation of proper environmental pollution control and mitigation measures for
the Project. In the reporting month, 5 site
inspections were carried out on 2, 9, 16, 21, 28 January 2014. Particular observations and status of non-compliance
issued by IEC are described below.
4.1.2 The Contractor has rectified most of the
observations as identified during environmental site inspection in the
reporting month within agreed time frame. Rectifications of remaining
identified items are undergoing by the Contractor. Follow-up inspections on the
status on provision of mitigation measures will be conducted to ensure all
identified items are mitigated properly.
4.1.3
Air Quality Impact
l Dark smoke was observed emitting from the breaker at Portion C2. The
Contractor should provide proper maintenance to the breaker to prevent the
arising of dark smoke.
l Dry condition was observed on haul roads and in works area all over the
site. The Contractor should provide regular and frequent spraying of water as
dust suppression measures.
l Dusty materials were
observed accumulated between
the damaged hoardings
and footpath at
Portion J2. The Contractor was
reminded to clear
the materials and
repair the damaged
hoardings so as
to prevent the
dusty materials from entering the channel underneath.
4.1.4
Construction Noise Impact
l Breaking and drilling activities were observed at Portion C2. With the
consideration of topography and safety concerns, the Contractor was reminded to
provide noise abatement measure to lessen noise impact to the NSRs.
4.1.5
Water
Quality Impact
l Nil
4.1.6
Chemical
and Waste Management
l Generator and chemical containers were observed to be stored in
Footbridge A, Portion A and C without the provision of drip tray. The
Contractor should provide drip tray or equivalent measures to retain leakage,
if any.
l Oil stain was found on bare ground near the generator placing in Portion
A. The Contractor should clear the contaminated soil and disposed of as
chemical waste.
l General refuse was observed accumulated at Footbridge B and C
respectively. The Contractor should clear the refuse as soon as possible and
avoid the accumulation of refuse
l Oil leakage from generator was observed at Footbridge A. The Contractor
should clear the oil stain and disposed of as chemical waste, and maintain the
generator in a good condition in order to prevent oil leakage.
4.1.7
Landscape and Visual Impact
l Nil
4.2
Advice on the Solid and Liquid
Waste Management Status
4.2.1 The Contractor is registered as a chemical
waste producer for this Project. C&D materials and wastes sorting were carried
out on site. Receptacles were available for C&D wastes and general refuse collection.
4.2.2 As advised by the Contractor, a total of 12,363m3 C&D
material was generated on site in the reporting month. 7,720m3 of hard rock and large broken concrete was generated and transferred to Anderson Road Quarry for
further process.
For C&D waste, no metals and plastic was
generated and collected by registered recycling collector. 10kg of paper
cardboard packing was generated on site and collected by
registered recycling collector.
No chemical waste was collected by licensed chemical waste collectors. 154.96 tonnes of other
types of wastes (e.g. general refuse and tree debris) were generated on site
and disposed of at North East New Territories (NENT) Landfill.
4.2.3
The Contractor is advised to properly maintain on site C&D materials
and wastes collection, sorting and recording system and maximize reuse /
recycle of C&D materials and wastes. The Contractor is reminded to properly
maintain the site tidiness and dispose of the wastes accumulated on site
regularly and properly.
4.2.4 The Contractor is
reminded that chemical waste containers should be properly treated and stored
temporarily in designated chemical waste storage area on site in accordance
with the Code of Practise on the Packaging, Labelling and Storage of Chemical
Wastes.
4.3
Environmental Licenses and
Permits
4.3.1 The environmental
licenses and permits for this Project and valid in the reporting month is
summarized in Table 4.1.
Table 4.1 Summary of Environmental
Licensing and Permit Status
|
Statutory Reference
|
Description
|
Permit
No.
|
Valid
Period
|
Remarks
|
|
From
|
To
|
|
EIAO
|
Environmental Permit
|
EP-140/2002
|
--
|
--
|
- Widening of a
section of Po Lam Road
- Improvement
works to existing roads
|
|
APCO
|
NA notification
|
--
|
16/04/09
|
--
|
-
Whole Construction Site
|
|
WPCO
|
Discharge License
|
WT0002558-2009
|
06/08/09
|
31/08/14
|
-
Discharge of Construction Runoff
|
|
Discharge License
|
EP670/I/C0613/293
|
02/02/12
|
28/02/17
|
- Discharge from Road L6
|
|
WDO
|
Chemical Waste Producer Registration
|
5213-292-C3249-32
|
19/03/08
|
--
|
-
Whole Construction Site
|
|
Waste Charges Account
|
7006839
|
12/03/08
|
--
|
-
Whole Construction Site
|
|
NCO
|
Construction Noise
Permit
|
GW-RE0750-13
|
17/07/13
|
10/01/14
|
- Whole Construction Site
|
|
GW-RE0982-13
|
20/09/13
|
03/02/14
|
- Hiu Kwong Street Works
|
4.4.1
In
response to the site audit findings, the Contractor carried out corrective
actions
promptly for particular items recorded. Outstanding items were closely monitored to ensure mitigation measures
are implemented properly.
4.4.2
A summary
of the Implementation Schedule of Environmental Mitigation Measures (EMIS) is
presented in Appendix B. Many necessary mitigation measures were implemented
properly.
4.5.1
All 1-Hour
TSP results were below the Action and Limit Level in the reporting month. Three
(3) exceedances of Action Level and one (1) exceedance of Limit Level were
recorded in 20 January 2014 for 24-hour TSP monitoring at ID2, 3, 4 and 5
respectively. Exceedances were not related to project.
4.5.2
According to the information provided by the
Contractor, no noise complaint was
received in the reporting month; hence, no Action Level
exceedance was recorded.
4.5.3
No Limit
Level exceedance for noise was recorded at all monitoring stations in the
reporting month.
4.5.4
Cumulative statistics on exceedances
is provided in Appendix J.
4.6.1
Complaints
shall be referred to the ET Leader for action. The ET Leader shall undertake
the following procedures upon receipt of any complaint:-
l Log complaint and date of receipt onto the
complaint database and inform the IC(E) immediately;
l Investigate the complaint to determine its
validity, and assess whether the source of the problem is due to works
activities;
l Identify mitigation measures in consultation
with the IC(E) if a complaint is valid and due to works;
l Advise the Contractor if additional mitigation measures are required;
l Review the Contractor’s response to identified
mitigation measures, and the updated situation;
l If the complaint is transferred from EPD,
submit interim report to EPD on status of the complaint investigation and
follow-up action within the time frame assigned by EPD;
l Undertake additional monitoring and audit to
verify the situation if necessary, and review that circumstances leading to the
complaint to not recur;
l Report investigation results and subsequent
actions to complainant (if the source of complaint is EPD, the results should
be reported within the time frame assigned by EPD); and
l Record the complaint, investigation, the
subsequent actions and the results in the monthly EM&A reports.
4.6.2
During any complaint investigation work, the Contractor and the ER
shall cooperate with the ET Leader in providing all necessary information and
assistance for completion of the investigation. If mitigation measures are identified
in the investigation, the Contractor shall promptly carry out the mitigation.
The ER shall ensure that all necessary measures have been carried out by the
Contractor.
4.6.3 According to the information provided by the Contractor
on 17 February 2014, dust related complaint which dated on 30 December 2013 was
confirmed to be recorded as enquiry. The cumulative statistics on complaints is
updated in Appendix J.
4.6.4
No environmental complaint and no notification of summons and successful prosecution were received in the reporting month.
5
FUTURE KEY
ISSUES
5.1.1
The major
construction works in February and March 2014 will be:-
l Site clearance
l Establishment of temporary access road and
temporary drainage
l Condition survey
l Slope stabilization and upgrading works
l Tree transplanting and protection
l Excavation work at portions A, B, C, J4, S1a, S1b, S2a, S2b, J1a
l Ground investigation and instrumentation
l Trial pit excavation
l Temporary traffic arrangement and road work at
J/O Po Lam Road & Sau Mau Ping Road, Sau Fung Street, J2
l Bridge prestressing work
l Toe / Berm planter and platform drainage
construction
l Maintenance Work
l Bridge structural works at Bridge A, B and D
l Retaining wall structural works
l Blasting
l Trench excavation and pipe laying
l Erection and maintenance of Blasting Cages
& Fencing
l RE wall panel installation and backfilling
l Permanent backfilling at portion S1c and S1a (former temple area)
l Erection and maintenance of hoarding
l Box culvert construction
l Construction of pedestrian subway
l Erection of panel wall at R15
l Stormwater tank construction
l Construction of retaining wall at R15b, R16a
and R16b
l Excavation of footbridge A, B,C
l Construction of footbridge A, B, C
l Structural works at Footbridge A, B and C
l Pipe jacking at Hiu Kwong Street.
5.2
Key Issues for the Coming Two
Months
5.2.1
Key issues
to be considered in the coming months
included:-
-
Properly store and label oil drums and chemical
containers placed on site;
-
Proper chemicals, chemical wastes and wastes management;
-
Maintenance works should be carried out within
roofed, paved areas with proper drainage system to handle run-off from
maintenance works;
-
Collection and segregation of construction waste
and general refuse should be carried out properly and regularly;
-
Site runoff should be properly collected and
treated prior to discharge;
-
Regular review and maintenance of drainage
systems and desilting facilities;
-
Exposed slopes/soil stockpiles should be
properly treated to avoid generation of silty surface run-off during rainstorm;
-
Proper mitigation measures should be provided to
avoid relocation of treated contaminated soil;
-
Regular review and maintenance of wheel washing
facilities provided at all site entrances/exits;
-
Suppress dust generated from work processes with
use of bagged cements, earth movements, drilling works, breaking works,
excavation activities, exposed areas/slopes/soil stockpiles and haul road traffic;
-
Conduct regular inspection of the working machineries within
works area to avoid any dark smoke emission and oil leakage;
-
Quieter powered mechanical equipment should be
used;
-
Provision of proper and effective noise control
measures, such as erection of movable noise barriers during blasting, breaking
and drilling works and at crushing
plant works area and provision of acoustic material wrapping to
breaking tips of breakers; and
-
Proper protection and regular inspection of
existing trees, transplanted/retained trees.
5.3.1
The
tentative schedule for environmental monitoring in February 2014 is provided in Appendix E.
6
ConclusionS AND RECOMMENDATIONS
6.1.1
The
construction phase of the project commenced in May 2008.
6.1.2
1-hour
TSP, 24-hour TSP and noise monitoring were carried out in the reporting month.
6.1.3
All 1-Hour
TSP results were below the Action and Limit Level in the reporting month. Three
(3) exceedances of Action Level and one (1) exceedance of Limit Level were
recorded in 20 January 2014 for 24-hour TSP monitoring at ID2, 3, 4 and 5
respectively. Exceedances were not related to project.
6.1.4 According to the
Contractor’s information, no noise complaint was received in the reporting
month. Hence, no Action Level exceedance was recorded.
6.1.5 No Limit Level exceedance for noise was
recorded at all monitoring stations in
the reporting month.
6.1.6 Environmental site inspections were carried out 5 times in
January 2014
Recommendations on remedial actions were given to the Contractor for the
deficiencies identified during the site audit.
6.1.7 According to the information provided by the Contractor,
no environmental complaint and no notification of summons and successful
prosecution were received in the reporting month.
6.2
Recommendations
6.2.1
According to the environmental site
inspections performed in the reporting month, the following recommendations
were provided:-
Air Quality Impact
l
Regular spraying of water should be provided as
dust suppression measure.
Construction Noise
Impact
l
Proper and effective noise mitigation
measures (e.g. provision of noise barriers, absorptive material coverage on
scaffolding and absorptive material wrappings to the breaking tips of the
breakers) should be implemented at the breaking and drilling works areas to
minimize the noise impacts to sensitive receivers nearby. The Contractor should
conduct regular review on and maintain the noise screening measures provided
within works area.
Water Quality
Impact
l
No specific observation was identified in the reporting month.
Chemical and Waste
Management
l
Sufficient drip tray
should be provided to the equipment and chemical containers in order to retain
any oil or chemical leakage. Moreover, regular inspection should be conducted
to maintain the status of the equipment to prevent any oil leakage and to
ensure that maintenance works are carried out in roofed, paved and confined
works area only.
l
On-site waste sorting
should be provided properly and dispose containers and cleared oil stain as
chemical waste accordingly
Landscape and
Visual Impact
l
No specific observation was identified in the reporting month.
