1.1.1
Civil Engineering
and Development Department is the Project Proponent for the Project “Site Formation and Associated
Infrastructural Works for Development of Columbarium, Crematorium and Related
Facilities at Sandy Ridge Cemetery”. The Project
is a Designated Project to be implemented under Environmental Permit No. EP-534/2017. The layout plan of the Project is shown in Appendix A. To facilitate the Project management, the Project works were separated into three different Contracts and they
are listed below.
1.1.2
Contract No. CV/2016/10 - Site
Formation and Associated Infrastructural Works for Development of Columbarium
at Sandy Ridge Cemetery
Ÿ
Site formation of about 1.77 ha of land for the proposed pick-up
and drop-off area for shuttle bus operation;
Ÿ
Upgrading of a section of 900m existing Sha Ling Road from 3m wide
carriageway to 7.3m wide carriageway with footpath at both sides;
Ÿ
Construction of one EVA with a total length of about 160m;
Ÿ
Construction of noise barriers along Sha Ling Road;
Ÿ
Modification of junction between Man Kam To Road and Sha Ling
Road;
Ÿ
Construction of a new pick up / drop off point at Man Kam To Road;
Ÿ
Relocation and construction of a new refuse collection point near
junction between Man Kam To Road and Sha Ling Road;
Ÿ
Associated geotechnical works including cut and fill slopes, soil
nailing works and retaining structures;
Ÿ
Associated drainage, sewerage and waterworks along Sha Ling Road;
and
Ÿ
Associated landscaping works.
1.1.3
Contract
No. CV/2017/02 - Infrastructural Works at Man Kam To Road and Lin Ma Hang Road
for Development of Columbarium at Sandy Ridge Cemetery
Ÿ
Construction of a new road connecting Columbarium site to
Crematorium site;
Ÿ
Construction of one EVA with a total length of about 300m;
Ÿ
Widening of a section of 1.4 km long Lin Ma Hang Road (between Man
Kam To Road and Ping Yuen River) from 6m wide carriageway to 7.3m with 2m width
footpath on both sides;
Ÿ
Provision of a pair of lay-by at Lin Ma Hang Road;
Ÿ
Construction of a new vehicular access connecting the Sheung Shui Landmark North PTI
and Lung Sum Avenue;
Ÿ
Construction of covered walkway along Fanling Station Road;
Ÿ
Removal of planters and central divider along Fanling Station Road
and San Wan Road;
Ÿ
Associated drainage, sewerage, waterworks and utility works along
Man Kam To Road and Lin Ma Hang Road;
Ÿ
Associated geotechnical works including cut and fill slopes, soil
nailing works and retaining structures; and
Ÿ
Associated landscaping works.
1.1.4
CEDD
Contract No. (to be advised)
Ÿ
Site Formation for the platform of the columbarium site;
Ÿ
Construction of two 2 at-grade access roads;
Ÿ
Construction of road junction between Man Kam To Road and the new
access road;
Ÿ
Associated drainage, sewerage and waterworks along the two new
access roads;
Ÿ
Associated geotechnical works including cut and fill slopes, soil
nailing works and retaining structures; and
Ÿ
Associated landscaping works
1.1.5
Hsin Chong Tsun
Yip Joint Venture has been awarded the CEDD Contract No. CV/2016/10 “Site Formation and Associated
Infrastructural Works for Development of
Columbarium at Sandy Ridge Cemetery” on 5 December 2017. According to the Contract requirement,
HCTYJV
shall take over
the responsibility for part of Environmental
Permit No. EP-534/2017 for ease of management, therefore application for Further Environmental Permit was submitted by HCTYJV to EPD on 26 January 2018 and Further Environmental Permit No. FEP-01/534/2017
was granted to
HCTY-JC by EPD on
23 February 2018. Major works to be executed under the Project shall include to the
following:
A Designated Project Under
EP-534/2017
(i)
Site formation of about 8 hectares of
land and associated drainage, sewerage and landscape works for development of Columbarium
and Crematorium facilities at the Sandy Ridge Cemetery;
(ii)
Construction of a new road (about 600m)
including a section of viaduct connecting the platform for Crematorium and Man
Kam To Road and the pick-up/drop-off point at Man Kam To Road.;
(iii)
Widening of about 900m of the existing
Sha Ling Road;
(iv)
Widening of about 1.4km of the existing
Lin Ma Hang Road; and
(v)
Improvement works to the existing
barging point at Siu Lam
Non-Designated Project
(i)
Construction of a sewage detention tank
complete with odour and septicity control mechanism;
(ii)
Construction of noise barriers along Sha
Ling Road;
(iii)
Construction of a new Refuse Collection
Point (RCP) near the junction between Man Kam To Road and Sha Ling Road;
(iv)
Landscaping works (including both hard
and soft landscape works);
(v)
Associated tree felling, transplanting
and compensatory planting works;
(vi)
Associated street lighting, street
furniture and road marking, etc.; and
(vii)
Other works which are specified in PS of
the Contract.
1.1.6
Action-United
Environmental Services & Consulting has been commissioned by HCTYJV as an Environmental
Team to implement the EM&A programme in accordance with the approved
EM&A Manual as well as the associated duties.
As part of the EM&A programme, baseline
monitoring is required to determine the ambient environmental conditions before construction work commencement.
1.1.7
Baseline monitoring for air quality was conducted from 25 April 2018 to 9 May 2018 and baseline noise monitoring was conducted from 25
April 2018 to 8 May 2018. For baseline water quality monitoring, due to accessibility to the monitoring point, it was
conducted from 27 April 2018 to 23 May 2018 for Locations M1, M3
and M4 and from 12
July 2018 to 6 August 2018 for Location
M2. During the baseline monitoring
period, no construction activities under the Project or other external
influencing factors of significant concern were observed.
1.1.8
This Baseline Monitoring Report presents the
detailed baseline study including project background,
monitoring methodology, monitoring results, summary of findings, and Action/Limit
(A/L) Levels established for subsequent use in the Project construction phase
EM&A programme.
1.2.1
The Baseline Monitoring Report is structured
into the following sections:-
Section 1 Introduction
Section 2 Summaries of Baseline
Monitoring Requirement.
Section 3 Baseline Monitoring
Methodology
Section 4 Baseline Monitoring
Results
Section 5 Conclusions and
Recommendations
2.1.1
The Environmental Monitoring and Audit requirements are set out in
the Approved EM&A Manual. Environmental issues such as air quality,
construction noise and water quality were identified as the key issues during
the construction phase of the Project.
2.1.2
This report presents the results obtained during the baseline
monitoring of air quality, noise and water quality. A summary of the baseline EM&A
requirement for air quality, noise and water quality monitoring are presented in the
sub-sections below.
2.2.1
The EM&A baseline monitoring shall cover the following
environmental aspect:
•
Air quality;
•
Construction noise; and
•
Water quality.
2.2.2
A summary of the monitoring parameters is presented in Table
2-1 below
Table 2-1 Summary
of EM&A Requirements
|
Environmental Issue
|
Parameters
|
|
Air Quality
|
Ÿ 1-hour TSP;
Ÿ 24-hour TSP
|
|
Noise
|
Ÿ Leq (30min) in normal working days
(Monday to Saturday) 07:00-19:00 except public holiday; and
Ÿ 3 sets of consecutive Leq (5min) on restricted hours i.e. 19:00 to 07:00 next
day, and whole day of public holiday or Sunday
|
|
Water Quality
|
In-situ
Measurements
Ÿ Dissolved Oxygen
Concentration (mg/L);
Ÿ Dissolved Oxygen Saturation
(% );
Ÿ Temperature (℃);
Ÿ Turbidity (NTU);
Ÿ Salinity
(ppm)
Ÿ pH unit;
Ÿ Water depth (m); and
Ÿ Stream
Flow Velocity (m/sec).
|
|
Laboratory Analysis
Ÿ Suspended Solids (mg/L)
|
2.3.1
According to the
Approved EM&A Manual, the designated monitoring
locations for air quality, noise and water quality under the monitoring programme are shown in Appendix B.
Air Quality
2.3.2
There were three (3) air quality
monitoring
stations / air quality sensitive receivers (ASR) recommended in the Approved EM&A Manual Section 5.6.1.1. When alternative monitoring locations
area proposed. The proposed site should be selected based on the following criteria as
far as practicable:
i)
Be at the site
boundary or such locations close to the major dust emission source;
ii)
Close to the sensitive receptors;
iii)
Take into account the prevailing
meteorological conditions;
iv)
For monitoring location located in the
vicinity of the ASRs, care shall be taken to cause minimal disturbance to the
occupants during monitoring.
v)
When positioning the HVS, the following
points shall be
noted:
a.
a horizontal platform with appropriate
support to secure the samples against gusty wind shall be provided;
b.
no two samplers shall be placed less than 2m
apart;
c.
the distance between the HVS and an obstacle,
such as buildings, must be at least twice the height that the obstacle
protrudes above the HVS;
d.
a minimum of 2 m separation from walls, parapets and
penthouses is required for HVS at the rooftop;
e.
a minimum of 2 m separation from any supporting structure,
measures horizontally is required;
f.
no furnace or incinerator flue is nearby;
g.
airflow around the sampler is unrestricted;
h.
the HVS is more than 20 m from the dripline;
i.
any wire fence and gate to protect the HVS,
shall not cause any obstruction during monitoring;
j.
permission must be obtained to set up the HVS
and to obtain access to the monitoring stations; and
k.
a secured
supply of electricity is needed to operate the HVS.
2.3.3
Site visits were conducted by the Contractor and ET on 6th
& 10th April 2018 to review and study sensitive receivers at surrounding and adjacent to the Project. Three (3) designated air quality
monitoring locations recommended in the Approved EM&A Manual
were identified
during the site visit. Moreover, the premises
owners for these 3 locations were agreed to set up the monitoring equipment for monitoring
work. The
locations chosen to conduct air quality baseline monitoring are considered
capable of effectively representing the baseline conditions at the impact
monitoring locations. The baseline air quality monitoring
locations are listed in Table 2-2 and illustrated in Appendix C.
Table 2-2 Baseline
Monitoring Locations for Air
Quality
|
Location ID
|
Location ID in EM&A
Manual
|
Description
|
Location
|
|
ASR-1
|
A1
|
Village
House along Man Kam To Road
|
Sha Ling
Village House No.6
|
|
ASR-2
|
A2
|
Village
House at San Uk Ling
|
San Uk Ling Village House No.1
|
|
ASR-3
|
A3
|
Village
House at Muk Wu Nga Yiu
|
Muk Wu Nga Yiu House No.28
|
Construction
Noise
2.3.4
There were four (4) noise monitoring locations
/ noise sensitive
receivers (NSR) recommended in the Approved EM&A Manual Section 6.5.1.1. Site visits were conducted by the
Contractor and ET on 6th & 10th April 2018 to review
and study sensitive
receivers at surrounding and adjacent to the Project. Four designated noise monitoring locations recommended
in the Approved EM&A
Manual were identified
during the site visit. They are listed in Table 2-3 and shown in Appendix
C.
Table 2-3 Baseline
Monitoring Locations for Construction
Noise
|
Location
ID
|
NSR ID in EIA
|
Description
|
Location
|
|
CN-1
|
N5-2
|
Village
house to the west of Sha Ling Road
|
Village
house to the west of Sha Ling Road (free
field condition)
|
|
CN-2
|
N9-1
|
Village house to
the north of Man Kam To Road
|
Sha Ling Village House No. 25 (free field condition)
|
|
CN-3
|
N18-5
|
Village house near
San Uk Ling
|
San Uk Ling Village House No. 18 (free field condition)
|
|
CN-4
|
N21-4
|
Village
house of Muk Wu
|
Muk Wu Village House No. 267 (1m façade from the building)
|
Water Quality
2.3.5
There were four (4) water quality monitoring
locations recommended in the Approved EM&A
Manual Section 7.6.1.2. Site visits were conducted by
the Contractor and ET on 6th & 10th April 2018 to review
and study sensitive
receivers at surrounding and adjacent to the Project. Water quality monitoring stations M1, M3
and M4 have been identified during the site visit. Having assessed the possible routes to
M2, the access to M2 was finally granted in late June 2018.
2.3.6
The location and coordinates for baseline water quality
monitoring are listed in Table 2-4 and illustrated in Appendix C.
Table 2-4 Baseline
Monitoring Stations for Water Quality
|
Proposed Location ID
|
Co-ordinates
|
Description
|
|
North
|
East
|
|
M1
|
843 431
|
831 308
|
Midstream
of Nam Hang Stream
|
|
M2
|
843 840
|
831 101
|
Downstream
of Nam Hang Stream
|
|
M3
|
843 509
|
830 040
|
Wetland
in the Conservation Area (CA) near Yuen Leng Chai
|
|
M4
|
843 997
|
831 783
|
Watercourse across Lin Ma
Hang Road, running from east of San Uk Ling to Man
Kam To Boundary Control Point
|
2.4.1
The requirements of baseline monitoring
are stipulated in Sections 5.7.1.1,
6.6.1.1 and 7.7.1.2 of the approved
EM&A Manual and presented as
follows.
Air Quality
Monitoring
2.4.2
Monitoring frequency for air quality baseline
monitoring is as follows:
|
Ÿ 1-Hour TSP
|
3 sets of 1-hour TSP monitoring shall be
carried out daily for a period of at least two weeks.
|
|
Ÿ 24-Hour TSP
|
Continuous monitoring of 24-hour shall be carried out
daily for a period of at least two weeks.
|
Noise Monitoring
2.4.3
The baseline noise monitoring shall be carried out continuous daily
for a period of at least two weeks. The baseline noise measurement for the time
period between 0700 and 1900 hours shall be measured in terms of Leq (30 minutes) or 6 sets of Leq (5mins).
For restricted hours between 19:00 and 07:00 (next morning), 3 sets
of Leq (5mins) of noise level measurement
shall be carry out
daily for a period of at least two weeks. However, the baseline monitoring for
construction noise in restricted hours was considered as less significance with
the following rationales:
•
Setting A/L Levels for construction noise
is not based on baseline noise levels at any monitoring stations (refer to the
following Section 6.8: Action/Limit Levels and Event
Action Plan); and
•
No construction activities are to be
undertaken during the restricted hours, no construction noise impacts related
to the works under the Project are therefore envisaged during the restricted
hours.
Water Quality Monitoring
2.4.4
The baseline monitoring frequency shall be 3 days per week, for at
least 4 weeks prior to the commencement of construction works. The interval between two sets of
monitoring shall not be less than 36 hours.
Air Quality
Monitoring
2.5.1
The 24-hour and 1-hour TSP levels shall be measured by following
the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. If the ET proposes to use a direct
reading dust meter to measure 1-hour TSP levels, it shall submit sufficient
information to the IEC to approve.
2.5.2
The filter paper
of 24-hour TSP measurement shall be determined by HOKLAS accredited laboratory.
2.5.3
All equipment used for baseline air quality monitoring is listed
in Table
2-5.
Table 2-5 Air
Quality Monitoring Equipment
|
Equipment
|
Model
|
|
24-Hr TSP
|
|
High
Volume Air Sampler (HVAS)
|
TISCH High Volume Air Sampler, HVS Model
TE-5170
|
|
Calibration
Kit
|
TISCH Model TE-5025A
|
|
1-Hour TSP
|
|
Portable Dust Meter
|
Sibata LD-3 Laser Dust monitor
Particle Mass Profiler & Counter
|
Wind Data Monitoring Equipment
2.5.4
According to the approved EM&A Manual, wind data monitoring
equipment shall also be provided and set up for logging wind speed and wind
direction near the dust monitoring locations. The equipment installation location shall
be proposed by the ET and agreed with the IEC. For installation and operation of wind
data monitoring equipment, the following points shall be observed:
1)
The wind sensors should be installed 10 m above ground so that
they are clear of obstructions or turbulence caused by buildings.
2)
The wind data should be captured by a data logger. The data shall
be downloaded for analysis at least once a month.
3)
The wind data monitoring equipment should be re-calibrated at
least once every six months.
4)
Wind direction should be divided into 16 sectors of 22.5 degrees
each.
2.5.5
ET has liaised with the premises owners/ landlords to grant the permission
for the HVS installation. However, they rejected to set
up wind data
monitoring equipment installation at their premises.
2.5.6
Under this situation, the ET proposed to use alternative method to
obtain representative wind data which extract from the Hong Kong Observatory Ta Kwu Ling
Weather Station. Ta Kwu Ling
Station is is
located near the Project site which situated at the sea level above 15mPD and
the wind data
monitoring equipment is installed 10 m above the existing ground.
Noise Monitoring
2.5.7
Sound level meter in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1)
and 804: 1985 (Type 1) specifications shall be used for carrying out the noise
monitoring. The sound level meter
shall be checked using an acoustic calibrator. The wind speed shall be checked with a
portable wind speed meter capable of measuring the wind speed in ms-1.
2.5.8
Noise monitoring equipment used for baseline monitoring is listed
in Table
2-6.
Table 2-6 Construction
Noise Monitoring Equipment
|
Equipment
|
Model
|
|
Integrating Sound Level Meter
|
B&K
Type 2238 / Rion NL-52 / NL-31
|
|
Calibrator
|
B&K
Type 4231 / Rion NC-73 / NC-74
|
|
Portable Wind Speed Indicator
|
Testo Anemometer
|
2.5.9
Sound level meters listed above comply with the International Electrotechnical
Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications, as recommended in TM issued
under the NCO. The acoustic
calibrator and sound level meter used in the baseline monitoring was calibrated
yearly.
Water Quality
Monitoring
2.5.10
Water quality parameters include dissolved oxygen, water temperature & depth, turbidity, salinity, pH and stream flow velocity shall
be measured in-situ, and suspended solids shall be analyzed by a HOKLAS-accredited
testing laboratory.
Dissolved Oxygen and Temperature Measurement
2.5.11
The dissolved oxygen (DO) measuring instruments should be portable
and weatherproof. The equipment should also complete with cable and sensor, and
DC power source. It should be capable of measuring:
• A DO level
in the range of 0 – 20 mg/L and 0 – 200% saturation; and
• A temperature of 0 – 45 degree Celsius.
2.5.12
The
equipment should have a membrane electrode with automatic temperature
compensation complete with a cable.
2.5.13
Should
salinity compensation not be built-in to the DO equipment, in-situ salinity
should be measured to calibrate the DO measuring instruments prior to each
measurement.
Turbidity Measurement
2.5.14
The turbidity measuring instruments should be
a portable and weatherproof with DC power source. It should have a photoelectric sensor
capable of measuring turbidity level between 0–1000 NTU (for example, Hach model 2100P or an approved similar instrument).
Salinity Measurement
2.5.15
A portable salinometer
capable of measuring salinity in the range of 0–40 parts per thousand (ppt) should be provided for measuring salinity of the water
at each monitoring location.
pH Measurement
2.5.16
A portable pH meter capable of measuring a
range between 0.0 and 14.0 should be provided to measure pH under the specified
conditions accordingly to the APHA Standard Methods.
Water Depth Measurement
2.5.17
A portable, battery-operated echo sounder or
an approved similar instrument should be used for water depths determination at
each designated monitoring station.
Stream Flow Velocity Equipment
2.5.18
Since the EM&A Manuals do not specified instrument to use
stream flow velocity measurement, the monitoring of stream flow velocity is
therefore proposed to be conducted by using a flow probe which is a digital
water velocity meter.
Water Sampling Equipment
2.5.19
A water sampler is required for suspended
solid (SS) monitoring. A water sampler e.g. Kahlsico Water Sampler, which is a transparent PVC cylinder
with capacity not less than 2 litres, will be used
for water sampling if water depth over than 0.5m.
2.5.20
For sampling from very shallow water depths e.g. <0.5 m, water
sample collection will be directly from water surface below 100mm use sampling
plastic bottle to avoid inclusion of bottom sediment or humus. Moreover, Teflon/stainless steel bailer
or self-made sampling buckets maybe used for water sampling. The equipment used for sampling will be
depended the sampling location and depth situations.
Sample Containers and Storage
2.5.21
Water samples for suspended solid should be
stored in high density polythene bottles with no preservative added, packed in
ice (cooled to 4°C without being frozen) and delivered to the laboratory within 24
hours of collection and be analyzed as soon as possible after collection.
2.5.22
Analysis of suspended solids should be carried out in a HOKLAS or
other accredited laboratory. Water samples of about 1L should be collected at
the monitoring stations for carrying out the laboratory suspended solids
determination. The SS determination
work should start within 24 hours after collection of the water samples. The SS
analyses should follow the APHA Standard
Methods 2540D with Limit of Reporting of 2 mg/L.
2.5.23
Water quality monitoring equipment used in the baseline monitoring
is listed in Table 2-7.
Table 2-7 Water
Quality Monitoring Equipment
|
Equipment
|
Model
|
|
Water Depth Detector
|
Eagle Sonar CUDA 300 or
tape measures
|
|
Water Sampler
|
A 2-litre transparent PVC
cylinder with latex cups at both ends or teflon/stainless
steel bailer or self-made sampler
|
|
Thermometer & DO meter
|
YSI
ProDSS Digital Sampling System Water Quality Meter or YSI
Professional Plus Multifunctional Meter
|
|
pH meter
|
YSI
ProDSS Digital Sampling System Water Quality Meter or YSI
Professional Plus Multifunctional Meter
|
|
Turbidimeter
|
YSI
ProDSS Digital Sampling System Water Quality Meter or Hach 2100Q
|
|
Salinometer
|
YSI
ProDSS Digital Sampling System Water Quality Meter or YSI
Professional Plus Multifunctional Meter
|
|
Stream Flow Velocity
|
FP211 Global Flow Probe
|
|
Sample Container
|
High density polythene
bottles (provided by laboratory)
|
|
Storage Container
|
‘Willow’ 33-litter plastic
cool box with Ice pad
|
2.5.24
Furthermore, Suspended
solids (SS) analysis is carried out by a local HOKLAS-accredited laboratory - ALS Technichem (HK) Pty Ltd.
2.6.1
The baseline results form the basis for determining the
environmental acceptance criteria for the impact monitoring. A summary of derivation of Action/Limit
(A/L) Levels for air quality, construction noise and water quality are shown in
Table
2-8, 2-9 and 2-10 respectively.
Table 2-8 Derivation of Action and
Limit Levels for Air Quality
|
Parameter
|
Action Level
|
Limit Level
|
|
24-hour
TSP
|
For
baseline level £ 200 mg/m3:
Action
level = (Baseline × 1.3 + Limit
level)/2
|
260
mg/m3
|
|
For
baseline level > 200 mg/m3:
Action
level = Limit level
|
|
1-hour
TSP
|
For
baseline level £ 384 mg/m3:
Action
level = (Baseline × 1.3 + Limit
level)/2
|
500
mg/m3
|
|
For
baseline level > 384 mg/m3:
Action
level = Limit level
|
Table 2-9 Derivation
of Action and Limit Levels for Construction Noise
|
Time Period
|
Action Level in dB(A)
|
Limit Level in dB(A)
|
|
0700-1900
hours on normal weekdays
|
When one documented complaint
is received
|
75*
dB(A)
|
Note: (*) Reduces
to 70 dB(A) for schools and 65 dB(A) during the school
examination periods. If works
are to be carried out during restricted hours, the conditions stipulated in the construction noise
permit issued by the NCA have to be followed.
Table 2-10 Derivation
of Action and Limit Levels for Water Quality
|
Parameters
|
Action
|
Limit
|
|
DO in mg/l
|
5 percentile of baseline data [1]
|
4 mg/L or 1 percentile of baseline data [1]
|
|
SS in mg/l
|
95 percentile of baseline data [2]
|
99 percentile of baseline data [2]
|
|
Turbidity in NTU
|
95 percentile of baseline data [2]
|
99 percentile of baseline data [2]
|
Notes:
[1] For
DO measurement, non-compliance occurs when monitoring result is lower than the
limits.
[2] For
SS and turbidity, non-compliance of water quality results when monitoring
results is higher than the limits.
Remarks:
All the figures given
in the table are used for reference only and the EPD may amend the figures
whenever necessary.
3.1.1
The baseline monitoring of air quality, noise and water
quality were
conducted prior commencement of the Project. During the baseline monitoring
period, there were no construction activities of this project or other external
influencing factors of significant concern observed by the ET.
3.2.1
Baseline
monitoring for air quality was conducted from 25 April 2018 to 9 May 2018 and baseline noise
monitoring was
conducted from 25 April 2018 to 8 May 2018. For baseline water quality monitoring,
due to accessibility to the monitoring point, it was conducted from 27 April 2018 to 23
May 2018 for Locations M1, M3 and M4 and from 12 July 2018 to 6 August 2018 for Location M2. The information of
monitoring stations is referred to Tables 2-2, 2-3 and 2-4
and the location of
monitoring locations are shown in Appendix C.
3.3.1
All the monitoring equipment to be used for baseline monitoring
are listed in Tables
2-5, 2-6 and 2-7 and they has been agreed with the IEC prior
to commencement of the baseline monitoring.
Air Quality
1-hour TSP
3.4.1
The 1-Hour TSP monitor, a Sibata LD-3
Laser Dust monitor Particle Mass Profiler & Counter was used for baseline
monitoring, which is a portable, battery-operated laser photometer. The 1-hour
TSP meter provides a real time 1-hour TSP measurement based on 900
light scattering. The 1-hour TSP monitor consisted of the following:
a.
A pump to draw sample aerosol through the optic chamber where TSP
is measured;
b.
A sheath air system to isolate the aerosol in the chamber to keep
the optics clean for maximum reliability; and
c.
A built-in data logger compatible with Windows based program to
facilitate data collection, analysis and reporting.
3.4.2
The 1-hour TSP meter used is within the valid period, calibrated
by the manufacturer prior to purchasing. Zero response of the instrument was
checked before and after each monitoring event. Operation of the 1-hour TSP meter was
follow manufacturer’s Operation and Service Manual. A valid calibration certificate is
attached in Appendix D.
24-hour TSP
3.4.3
The equipment used for 24-hour TSP measurement is a Tisch Environmental, Inc. Model TE-5170 TSP high volume air
sampling system, which complied with EPA Code of Federal Regulation, Appendix B to Part 50. The High Volume Air Sampler
(HVS) consists of the following:
a.
An anodized aluminum shelter;
b.
A 8”x10” stainless steel filter holder;
c.
A blower motor assembly;
d.
A continuous flow/pressure recorder;
e.
A motor speed-voltage control/elapsed time indicator;
f.
A 7-day mechanical timer, and
g.
A power supply of 220v/50 hz
3.4.4
Prior of 24-hour TSP monitoring, the HVS was calibrated in
accordance with the manufacturer’s instruction using the NIST-certified
standard calibrator (Tisch Calibration Kit Model
TE-5025A). The 24-hour TSP
Monitoring using the HVS was also processed in accordance with the
manufacturer’s Operations Manual. A
valid calibration certificate of the calibration kit with the certificate of
HVS calibrated is attached in Appendix D.
3.4.5
24-hour TSP was collected by the ET on filters of HVS and quantified
by a local HOKLAS accredited laboratory, ALS Technichem
(HK) Pty Ltd (ALS), upon receipt of the samples. The ET keeps all the sampled 24-hour TSP
filters in normal air conditioned room conditions, i.e. 70% HR (Relative
Humidity) and 25oC, for six months prior to disposal.
Background
Noise
3.4.6
Sound level meter listed above comply with the International Electrotechnical Commission Publications 651: 1979 (Type 1)
and 804: 1985 (Type 1) specifications, as recommended in Technical Memorandum
(TM) issued under the Noise Control Ordinance (NCO), which was used for
baseline noise monitoring. A valid
of calibration certificates including sound level meter and an acoustic were
shown in Appendix D.
3.4.7
The noise measurement was performed with the meter set to FAST
response and on the A-weighted equivalent continuous sound pressure level (Leq). Leq(30min)
in six consecutive Leq(5min) and three sets of Leq(5min) measurements were respective used as the
monitoring parameter throughout the baseline monitoring period during the
daytime and the restricted hours.
3.4.8
During the baseline monitoring, the sound level meter was mounted
on a tripod at a height of about 1.2 m and placed at the monitoring locations
and oriented such that the microphone was pointed to the site with the
microphone facing perpendicular to the line of sight. The windshield was fitted
for the measurement. For the
baseline noise monitoring, CN-1, CN-2 and CN-3 were conducted in a free-field situation i.e.
at least 3.5 m away from reflective surfaces of the adjacent buildings or
walls; furthermore CN-4 measurement was carried at 1 m from the exterior of the building
façade.
3.4.9
Prior baseline noise measurement, the accuracy of the sound level
meter was checked using an acoustic calibrator generating a known sound
pressure level at a known frequency.
The calibration level from before and after the noise measurement agrees
to within 1.0dB.
3.4.10
During the noise measurement, a portable wind speed meter was used
to check wind speed (m/s). For
baseline noise monitoring, no wind speed was exceeding 5m/s or gusts exceeding
10m/s. Also, noise measurement in
time was no fog and rain.
Water
Quality
3.4.11
Water quality monitoring was conducted at the four designated
locations. In-situ of replicate measurements was undertaken during baseline
monitoring; where the difference in value between the first and second in-situ
measurement of DO or turbidity parameters is more than 25% of the value of the
first reading, the reading was discarded then further readings to be take. Moreover, duplicate sample collection
was also conducted from each monitoring location. The sampling and in-situ measurement
process are below:
Sampling
Procedure
3.4.12
A Digital Global Positioning System (GPS)
was used to identify the designated monitoring stations. Prior to water sampling, a portable,
battery-operated echo sounder or tape measure was used for the determination of
water depth at each station. At
each station, water samples were collected from 0.1m below water surface or
water surface to prevent the river bed sediment for stirring.
3.4.13
The sample container was rinsed with a portion of the water
sample. The water sample then was
transferred to the high-density polythene
bottles as provided by the laboratory, labeled with a unique sample
number and sealed with a screw cap.
3.4.14
Before commencement of the sampling, general information such as
the date and time of sampling and weather condition as well as the personnel
responsible for the monitoring were be recorded on the monitoring field data
sheet.
3.4.15
A ‘Willow’ 33-liter plastic cool box packed with ice was used to
preserve the collected water samples prior to arrival at the laboratory for
chemical determination. The water
temperature of the cool box was maintained at a temperature as close to 4℃ as
possible without being frozen.
Samples collected were delivered to the laboratory upon collection.
In-situ Measurement
3.4.16
YSI Professional Plus
Multifunctional Meter was used for water
in-situ measures, which automates the measurements and data logging of water
temperature, dissolved oxygen & dissolved oxygen saturation, pH unit and salinity. Before
each round of monitoring, the instrument was checked in accordance with the
manufactory manual instruction to sure it valid.
3.4.17
A portable Hach
2100Q Turbidimeter was used for in-situ turbidity
measurement. The turbidity meter is capable of measuring turbidity in the range
of 0 – 1000 NTU. StablCal®
Standards 10NTU and 100NTU are used for calibration of the
instrument before and after measurement.
3.4.18
All in-situ measurement equipment were calibrated by HOKLAS accredited laboratory of three month
interval. The valid certificates are shown in Appendix D.
3.4.19
A flow probe brand named FP211
Global Flow Probe was used to carry out stream/river flow velocity
measurement. The measurement was
conducted between water surface and 0.1m below at each water quality monitoring
location.
Laboratory Analysis
3.4.20
All water samples were analyzed the
concentration of
Suspended Solids (SS) as specified in the EM&A
Manual by a local HOKLAS-accredited testing laboratory (ALS Technichem (HK) Pty Ltd HOKLAS registration no. 66). SS analysis was determined by the laboratory
upon receipt of the water samples using
APHA Standard Methods 2540D. HOKLAS-accreditation
certificate of the testing laboratory is provided in Appendix E. The SS
determination is started within 48 hours upon receipt, which is well within the required maximum sample storage time
of the parameter of 7 days.
3.5.1
The baseline monitoring data were handled by the
ET’s in-house data
recording and management system.
3.5.2
The monitoring data recorded in the equipment were downloaded
directly from the equipment at the end of each monitoring day. The downloaded monitoring data were
input into a computerized database properly maintained by the ET. The laboratory results were input
directly into the computerized database and checked by personnel other than
those who input the data.
3.5.3
For monitoring parameters that require laboratory analysis, the
local laboratory shall follow the QA/QC requirements as set out under the
HOKLAS scheme for the relevant laboratory tests
4.1.1
The baseline monitoring schedules are presented in Appendix
F and the monitoring results are presented in the following sub-sections.
4.2.1
Baseline air quality monitoring was carried out at ASR-1, ASR-2
and ASR-3 during the period between 25 April 2018 and 9 May 2018. The results for 24-hour and 1-hour TSP
are summarized in Tables 4-1 to 4-3.
The detailed
24-hour TSP data are shown in Appendix
G.
Table 4-1 Summary
of 24-hour and 1-hour TSP Monitoring Results – ASR-1
|
Date
|
24-hour TSP (mg/m3)
|
1-hour TSP (mg/m3)
|
|
Date
|
Start Time
|
1st Measurement
|
2nd Measurement
|
3rd Measurement
|
|
25/4/2018
|
136
|
25/4/2018
|
9:36
|
87
|
92
|
110
|
|
26/4/2018
|
101
|
26/4/2018
|
9:31
|
272
|
255
|
241
|
|
27/4/2018
|
71
|
27/4/2018
|
9:37
|
350
|
276
|
249
|
|
28/4/2018
|
131
|
28/4/2018
|
9:33
|
129
|
137
|
137
|
|
29/4/2018
|
69
|
29/4/2018
|
10:08
|
159
|
156
|
154
|
|
30/4/2018
|
113
|
30/4/2018
|
9:54
|
86
|
96
|
103
|
|
01/5/2018
|
48
|
01/5/2018
|
9:34
|
123
|
128
|
131
|
|
02/5/2018
|
59
|
02/5/2018
|
9:24
|
74
|
80
|
86
|
|
03/5/2018
|
38
|
03/5/2018
|
9:28
|
89
|
84
|
90
|
|
04/5/2018
|
128
|
04/5/2018
|
9:21
|
121
|
120
|
126
|
|
05/5/2018
|
63
|
05/5/2018
|
8:51
|
80
|
78
|
71
|
|
06/5/2018
|
19
|
06/5/2018
|
9:43
|
68
|
69
|
76
|
|
07/5/2018
|
63
|
07/5/2018
|
9:34
|
58
|
60
|
53
|
|
08/5/2018
|
62
|
08/5/2018
|
9:36
|
79
|
83
|
82
|
|
Average
(Range)
|
78
(19-136)
|
Average
(Range)
|
124
(53-350)
|
Table 4-2 Summary
of 24-hour and 1-hour TSP Monitoring Results – ASR-2
|
Date
|
24-hour TSP (mg/m3)
|
1-hour TSP (mg/m3)
|
|
Date
|
Start Time
|
1st Measurement
|
2nd Measurement
|
3rd Measurement
|
|
25/4/2018
|
PSF
|
25/4/2018
|
9:29
|
85
|
95
|
106
|
|
26/4/2018
|
74
|
26/4/2018
|
9:34
|
221
|
214
|
211
|
|
27/4/2018
|
83
|
27/4/2018
|
9:44
|
255
|
208
|
172
|
|
28/4/2018
|
65
|
28/4/2018
|
9:39
|
119
|
121
|
128
|
|
29/4/2018
|
60
|
29/4/2018
|
9:49
|
100
|
108
|
114
|
|
30/4/2018
|
45
|
30/4/2018
|
10:02
|
80
|
84
|
93
|
|
01/5/2018
|
41
|
01/5/2018
|
9:57
|
63
|
66
|
74
|
|
02/5/2018
|
68
|
02/5/2018
|
9:34
|
62
|
63
|
68
|
|
03/5/2018
|
41
|
03/5/2018
|
9:37
|
91
|
92
|
87
|
|
04/5/2018
|
59
|
04/5/2018
|
9:30
|
94
|
92
|
94
|
|
05/5/2018
|
45
|
05/5/2018
|
8:58
|
85
|
77
|
66
|
|
06/5/2018
|
36
|
06/5/2018
|
9:54
|
46
|
53
|
62
|
|
07/5/2018
|
45
|
07/5/2018
|
9:40
|
50
|
51
|
53
|
|
08/5/2018
|
41
|
08/5/2018
|
9:45
|
78
|
84
|
79
|
|
09/5/2018
|
47
|
|
|
|
|
|
|
Average
(Range)
|
54
(36-83)
|
Average
(Range)
|
101
(46-255)
|
Remarks:
PSF – Power Supply Failure
Table 4-3 Summary
of 24-hour and 1-hour TSP Monitoring Results – ASR-3
|
Date
|
24-hour TSP (mg/m3)
|
1-hour TSP (mg/m3)
|
|
Date
|
Start Time
|
1st Measurement
|
2nd Measurement
|
3rd Measurement
|
|
25/4/2018
|
76
|
25/4/2018
|
9:22
|
88
|
94
|
108
|
|
26/4/2018
|
64
|
26/4/2018
|
9:45
|
195
|
180
|
166
|
|
27/4/2018
|
70
|
27/4/2018
|
9:59
|
98
|
65
|
104
|
|
28/4/2018
|
46
|
28/4/2018
|
9:39
|
108
|
117
|
132
|
|
29/4/2018
|
54
|
29/4/2018
|
10:11
|
90
|
107
|
114
|
|
30/4/2018
|
40
|
30/4/2018
|
10:06
|
89
|
85
|
102
|
|
01/5/2018
|
37
|
01/5/2018
|
10:10
|
63
|
65
|
71
|
|
02/5/2018
|
43
|
02/5/2018
|
9:41
|
58
|
61
|
64
|
|
03/5/2018
|
PSF
|
03/5/2018
|
9:49
|
85
|
86
|
87
|
|
04/5/2018
|
55
|
04/5/2018
|
9:41
|
83
|
81
|
82
|
|
05/5/2018
|
41
|
05/5/2018
|
9:03
|
76
|
82
|
77
|
|
06/5/2018
|
20
|
06/5/2018
|
10:09
|
49
|
54
|
60
|
|
07/5/2018
|
32
|
07/5/2018
|
9:46
|
49
|
47
|
51
|
|
08/5/2018
|
33
|
08/5/2018
|
9:54
|
73
|
74
|
71
|
|
09/5/2018
|
29
|
|
|
|
|
|
|
Average
(Range)
|
46
(20-76)
|
Average
(Range)
|
88
(47-195)
|
Remarks:
PSF – Power Supply Failure
4.2.2
During the
baseline monitoring period, no construction activities under the project were
observed.
However, other dust source from the road traffic of Sha Ling Road and
Lin Ma Hang Road was observed at ASR-1 and ASR-2 respectively since they are
road side stations. The dust source
from the road traffic is considered as the background condition as it already
existed before the project commencement.
4.2.3
The meteorological data during the baseline monitoring period are
summarized in Appendix H.
Action/Limit Levels for Air
Quality
4.2.4
Following the criteria shown in Table 2-8 of this report,
the proposed Action and Limit Levels for 24-hour and 1-hour TSP are listed in Table
4-4.
Table 4-4 Action
and Limit Levels for Air Quality Monitoring for all Stations
|
Monitoring
Station
|
Action Level (mg /m3)
|
Limit Level (mg/m3)
|
|
1-hour TSP
|
24-hour TSP
|
1-hour TSP
|
24-hour TSP
|
|
ASR-1
|
331
|
181
|
500
|
260
|
|
ASR-2
|
316
|
165
|
500
|
260
|
|
ASR-3
|
307
|
160
|
500
|
260
|
Note: 1-hour
& 24-hour TSP Action Level = (Baseline × 1.3 + Limit level)/2
4.3.1
The baseline noise monitoring was undertaken at CN-1, CN-2, CN-3
and CN-4 form 25 April 2018 to 8 May 2018. During the
noise measurement, a portable wind speed meter was used to check wind speed (m/s) to ensure no wind speed was exceeding 5m/s or gusts exceeding 10m/s and no noise measurement were
carried out under rain. The measurement data are shown in Appendix
F and summarized in Table 4-5 to Table 4-8.
Table
4-5 Summary
of Noise Monitoring Results (dB(A)) – CN-1
|
Date
|
Daytime (07:00
– 19:00)
|
Restricted
Hours (19:00 – 07:00 next day)
|
|
(#)LAeq30mins
|
Observation
|
1st
(#)LAeq5mins
|
2nd
(#)LAeq5mins
|
3rd
(#)LAeq5mins
|
Observation
|
|
25-Apr-18
|
67.4
|
Normal
|
55.8
|
55.7
|
54.6
|
Normal
|
|
26-Apr-18
|
66.0
|
Normal
|
64.4
|
67.4
|
63.7
|
Normal
|
|
27-Apr-18
|
66.9
|
Normal
|
57.7
|
55.2
|
58.1
|
Normal
|
|
28-Apr-18
|
71.3
|
Dog Barking
|
74.3
|
68.0
|
70.6
|
Dog Barking
|
|
29-Apr-18*
|
54.7
|
Normal
|
63.8
|
60.8
|
65.8
|
Normal
|
|
30-Apr-18
|
75.5
|
Dog Barking
|
57.0
|
63.5
|
57.1
|
Normal
|
|
1-May-18*
|
53.0
|
Normal
|
74.2
|
63.4
|
57.5
|
Dog Barking
|
|
2-May-18
|
72.3
|
Barking
|
62.2
|
63.4
|
58.6
|
Normal
|
|
3-May-18
|
70.0
|
Dog Barking
|
63.4
|
52.5
|
60.7
|
Normal
|
|
4-May-18
|
76.1
|
Vehicle Noise
|
70.2
|
67.2
|
62.6
|
Normal
|
|
5-May-18
|
72.9
|
Dog Barking
|
52.5
|
53.9
|
66.5
|
Normal
|
|
6-May-18*
|
52.8
|
Normal
|
63.9
|
62.9
|
58.5
|
Dog Barking
|
|
7-May-18
|
79.2
|
Vehicle Noise
|
72.5
|
58.2
|
62.7
|
Dog Barking
|
|
8-May-18
|
68.5
|
Normal
|
72.8
|
57.6
|
73.6
|
Dog Barking
|
Remarks:
(#) Sound level meter set at CN-1 is
made free-field measurement, façade correction (+3dB(A))
has added according to acoustical principles and EPD guidelines
(*)
Sunday or Public Holiday
Note:
Figures refer to the measurement
recorded at the designated station during the entire baseline period for
general reference.
Table
4-6 Summary
of Noise Monitoring Results (dB(A)) – CN-2
|
Date
|
Daytime (07:00
– 19:00)
|
Restricted Hours
(19:00 – 07:00 next day)
|
|
(#)LAeq30mins
|
Observation
|
1st
(#)LAeq5mins
|
2nd
(#)LAeq5mins
|
3rd
(#)LAeq5mins
|
Observation
|
|
25-Apr-18
|
65.1
|
Normal
|
63.4
|
64.4
|
64.2
|
Normal
|
|
26-Apr-18
|
64.3
|
Normal
|
65.3
|
65.3
|
56.4
|
Normal
|
|
27-Apr-18
|
67.5
|
Normal
|
62.2
|
63.3
|
64.5
|
Normal
|
|
28-Apr-18
|
67.1
|
Normal
|
60.4
|
61.0
|
61.3
|
Normal
|
