2.
EM&A REQUIREMENTS
2.1
Summary of EM&A Requirements
2.1.1
The
EM&A programme was undertaken in accordance with the Updated EM&A
Manual for HKBCF (Version 1.0). It should be noted that the air quality and
noise monitoring works for the Contract are covered by Contract No. HY/2013/01 “Hong
Kong-Zhuhai-Macao-Bridge HKBCF – Passenger Clearance Building” and Contract No.
HY/2011/03 “Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road – Section between
Scenic Hill and HKBCF”. The ET of the Contract or another ET of the HZMB
project is required to conduct impact air quality monitoring at AMS2,
AMS3B/AMS3C, AMS6 and AMS7B, and
noise monitoring at NMS2 and NMS3B/NMS3C (According to the notification from
IEC, the air quality monitoring at AMS3B, noise monitoring at NMS3B, and wind
data monitoring retrieved from the meteorological station situated at Site
Boundary of Site Office Area at Work Area WA2, being carried out by the ET for
Contract No. HY/2013/01, under the EM&A programme for the HZMB HKBCF
Project have been proposed to be carried out at alternative monitoring stations
by the ET for Contract No. HY/2013/04 as a result of the re-location of Site Boundary
of Site Office Area at Work Area WA2 to WA3 and suspension of electricity
supplies at WA2 after 15 August 2018. The implementation of environmental
monitoring for air quality, noise have been conducting by the ET for Contract
No. HY/2013/01 of which the air quality monitoring station (AMS3B) and noise
monitoring station (NMS3B) have been re-located since 20 August 2018 to air
quality monitoring station (AMS3C) and noise monitoring station (NMS3C)), water
quality monitoring at the locations shown in Figure 3 and ecological monitoring as shown in Figure 4 as part of EM&A programme if these monitoring stations
are no longer covered under Contract Nos. HY/2013/01 and HY/2011/03. However,
this is subject to ENPO’s final decision on which ET should carry out the
monitoring work at these stations.
The ET of the Contract or another ET of the HZMB project is
required to conduct impact
ecological monitoring at 24 transects as part of
EM&A programme if these transects are no longer covered under Contract No.
HY/2013/01. The impact ecological monitoring should adopt line-transect vessel survey method. The survey follows
pre-set and fixed transect lines in the two areas defined by AFCD as: Northeast
Lantau survey area and Northwest Lantau survey area. The
co-ordinates for the transect lines and layout map are shown as in Figure 4.
2.1.2
A
summary of air and noise monitoring locations are presented in Table 2.1. The location of air quality
and noise monitoring stations are shown as in Figure 1 and Figure 2,
respectively.
Table 2.1 Air Quality and Noise Monitoring Locations
|
Environmental Monitoring |
Identification No. |
Location Description |
|
Air Quality |
AMS2(1) (4) |
Tung Chung Development Pier |
|
AMS3B(1) (4) (6) |
Site Boundary of Site Office Area at Work Area WA2 |
|
|
AMS3C(1) (4) (6) |
Ying Tung Estate Market Rooftop |
|
|
AMS6(1) |
Dragonair/CNAC
(Group) Building (A80) |
|
|
AMS7B(1) (5) |
3RS Site Offices |
|
|
Noise |
NMS2(2) |
|
|
NMS3B(2) (3) (7) |
Site Boundary of Site Office Area at WA2 |
|
|
NMS3C(2) (3) (7) |
Ying Tung Estate Refuse Collection Point |
Remarks:
(1)
The ET of this Contract should conduct
impact air quality monitoring at the AMS listed in the table as part of
EM&A programme according to latest notification from ENPO when the
monitoring station(s) is/are no longer covered by another ET of the HZMB project.
(2)
The ET of this Contract should conduct
impact noise monitoring at the NMS listed in the table as part of EM&A
programme according to the latest notification from ENPO when the monitoring
station(s) is/are no longer covered by another ET of the HZMB project.
(3)
The Action and Limit Levels for schools
will be applied for this alternative monitoring location.
(4)
According to the revised Contract
Specific EM&A Manual (Rev. 9), the monitoring results for AMS2 and AMS3B
will be reported in the monthly EM&A Reports prepared for Contract Nos.
HY/2013/03 start from Feb 2018.
(5)
Air quality monitoring station (AMS7)
have been re-located to the alternative air quality monitoring station (AMS7B)
since 06 Feb 2018
(6)
Air quality monitoring station (AMS3B)
have been re-located to the alternative air quality monitoring station (AMS3C)
since 20 Aug 2018
(7)
Noise monitoring station (NMS3B) have
been re-located to the alternative noise monitoring station (NMS3C) since 20
Aug 2018
2.1.3
The
water monitoring works for the Contract are covered by Contract No. HY/2013/01
“Hong Kong-Zhuhai-Macao-Bridge HKBCF – Passenger Clearance Building”. The water
quality monitoring station (SR3, SR10A and SR10B(N))
had been slightly re-located since 22 December 2017. A summary of water quality
monitoring stations are presented in Table
2.2. The location of water quality monitoring stations are shown as in Figure 3.
Table 2.2
Water Quality Monitoring Stations
|
Station |
Description |
East |
North |
|
IS5 |
Impact
Station (Close to HKBCF construction site) |
811579 |
817106 |
|
IS(Mf)6 |
Impact
Station (Close to HKBCF construction site) |
812101 |
817873 |
|
IS7 |
Impact Station (Close to HKBCF
construction site) |
812244 |
818777 |
|
IS8 |
Impact
Station (Close to HKBCF construction site) |
814251 |
818412 |
|
IS(Mf)9 |
Impact
Station (Close to HKBCF construction site) |
813273 |
818850 |
|
IS10(N) |
Impact Station (Close to HKBCF
construction site) |
812942 |
820881 |
|
IS(Mf)11 |
Impact
Station (Close to HKBCF construction site) |
813562 |
820716 |
|
IS(Mf)16 |
Impact
Station (Close to HKBCF construction site) |
814328 |
819497 |
|
IS17 |
Impact
Station (Close to HKBCF construction site) |
814539 |
820391 |
|
SR3 |
Sensitive
receivers (San Tau SSSI) |
810525 |
816456 |
|
SR3(N) |
Sensitive
receivers (San Tau SSSI) |
810689 |
816591 |
|
SR4(N) |
Sensitive
receivers (Tai Ho) |
814705 |
817859 |
|
SR5(N) |
Control Station |
812569 |
821475 |
|
SR6 |
Sensitive receivers (Sha Chau and Lung Kwu Chau Marine Park) |
805837 |
821818 |
|
SR7 |
Sensitive
receivers (Tai Mo Do) |
814293 |
821431 |
|
SR10A |
Sensitive
receivers (Ma Wan FCZ) 1 |
823741 |
823495 |
|
SR10A(N) (1) |
Sensitive
receivers (Ma Wan FCZ) 1 |
823644 |
823484 |
|
SR10B(N) |
Sensitive
receivers (Ma Wan FCZ) 2 |
823683 |
823187 |
|
SR10B(N2) (1) |
Sensitive
receivers (Ma Wan FCZ) 2 |
823689 |
823159 |
|
CS(Mf)3(N) |
Control Station |
808814 |
822355 |
|
CS(Mf)5 |
Control
Station |
817990 |
821129 |
|
CS4 |
Control
Station |
810025 |
824004 |
|
CS6 |
Control
Station |
817028 |
823992 |
|
CSA(2] |
Control
Station |
818103 |
823064 |
Note:
(1) Additional monitoring
station for Ma Wan FCZ
(2) Additional control monitoring station for Ma Wan FCZ
Remarks:
The ET of the Contract should conduct impact
water quality monitoring at the WQMs listed in the table as part of EM&A
programme according to latest notification from ENPO if water quality
monitoring is no longer covered by another ET of the HZMB project. The ET of
the Contract shall communicate and share the monitoring data to the ET(s) of
the other contracts if the water quality monitoring station(s) is/are as part
of EM&A programme.
SR3(N), SR10A(N) and
SR10B(N2) are alternative WQM Stations.
2.2
Monitoring Requirements
2.2.1
The
monitoring requirements, monitoring equipment, monitoring parameters, frequency
and duration, monitoring methodology, monitoring schedule, meteorological
information are detailed in the monthly EM&A Reports prepared by Contract No. HY/2013/01 and
HY/2011/03.
2.3
Action and Limit Levels
2.3.1
The Action and Limit Levels for 1-hr TSP
and 24-hr TSP are provided in Table 2.3
and Table 2.4 respectively.
Table 2.3 Action and
Limit Levels for 1-hour TSP
|
Monitoring Station |
Action Level (µg/m³) |
Limit Level (µg/m³) |
|
AMS2 |
374 |
500 |
|
AMS3B |
368 |
|
|
AMS3C |
368 |
|
|
AMS6 |
360 |
|
|
AMS7B |
370 |
Remarks: Air quality monitoring station (AMS3B) have been
re-located to the alternative air quality monitoring station (AMS3C) since 20
Aug 2018
Table 2.4 Action and Limit Levels for 24-hour TSP
|
Monitoring Station |
Action Level (µg/m³) |
Limit Level (µg/m³) |
|
AMS2 |
176 |
260 |
|
AMS3B |
167 |
|
|
AMS3C |
167 |
|
|
AMS6 |
173 |
|
|
AMS7B |
183 |
Remarks:
Air quality monitoring station (AMS3B) have been re-located to the alternative
air quality monitoring station (AMS3C) since 20 Aug 2018
2.3.2
The
Action and Limit Levels for construction noise are defined in Table 2.5.
Table 2.5 Action and
Limit Level for Construction Noise
|
Monitoring Station |
Action Level |
Limit Level |
|
For the Time Period 0700-1900 hrs. on |
||
|
NMS2 |
When one documented complaint is received |
75.0 dB (A) Leq (30
min.) |
|
NMS3B |
70.0 dB (A) Leq (30
min.)* |
|
|
NMS3C |
70.0 dB (A) Leq (30
min.)* |
|
Notes:
If works are to
be carried out during restricted hours, the conditions stipulated in the
construction noise permit issued by the Noise Control Authority have to be
followed.
*
Reduce to 70 dB(A) for schools and 65 dB(A) during
school examination period.
Remarks: Noise
monitoring station (NMS3B) have been re-located to the alternative noise
monitoring station (NMS3C) since 20 Aug 2018
2.3.3
The
Action and Limit Levels for Water Quality are provided in Table 2.6.
Table 2.6 Action and Limit
Levels for Water Quality
|
Parameters |
Action |
Limit |
|
DO in
mg/L (Surface, Middle & Bottom) |
Surface
and Middle 5.0 Bottom
4.7 |
Surface and Middle =
4.2 (except 5 mg/L for FCZ) Bottom = 3.6 |
|
SS in
mg/L (depth-averaged) at all
monitoring stations and control stations |
23.5 and 120% of
upstream control station's SS at the same tide of the same day* |
34.4 and 130% of
upstream control station's SS at the same tide of the same day and 10mg/L for
WSD Seawater intakes* |
|
Turbidity in NTU (depth averaged) |
27.5 and 120% of
upstream control station's turbidity at the same tide of the same day* |
47.0 and 130% of
upstream control station's turbidity at the same tide of the same day* |
* Remarks: Reference
is made to EPD approval of adjustment of water quality assessment criteria
issued and became effective on 18 February 2013.
Notes:
1.
”depth-averaged"
is calculated by taking the arithmetic means of reading of all three depths.
2.
For
DO, non-compliance of the water quality limits occurs when monitoring result is
lower than the limits.
3.
For
turbidity, SS, non-compliance of the water quality limits occurs when
monitoring result is higher than the limits.
4.
All
the figures given in the table are used for reference only and the EPD may amend
the figures whenever it is considered as necessary.
5.
The
1%-ile of baseline data for dissolved oxygen (surface
and middle) and dissolved oxygen (bottom) are 4.2mg/L and 3.6mg/L respectively.
2.3.4
The Action and Limit Levels for
Ecological Monitoring are provided in Table
2.7 and Table 2.8.
Table 2.7 Action and Limit Levels for
Ecological Monitoring - Approach to Define Action Level (AL) and Limit Level
(LL)
|
|
North Lantau Social
Cluster |
|
|
NEL |
NWL |
|
|
Action Level |
(STG
< 70% of baseline) & (ANI
< 70% of baseline) |
(STG
< 70% of baseline) & (ANI
< 70% of baseline) |
|
Limit Level |
[(STG
< 40% of baseline) & (ANI < 40% of baseline)] AND [ (STG
< 40% of baseline) & (ANI < 40% of baseline)] |
|
For North Lantau Social Cluster, action level
will be trigger if either NEL or NWL fall below the criteria; limit level will
be triggered if both NEL and NWL fall below the criteria.
Table 2.8 Derived Value of Action Level
(AL) and Limit Level (LL) for Ecological Monitoring
|
|
North Lantau Social
Cluster |
|
|
NEL |
NWL |
|
|
Action Level |
(STG
< 4.2) & (ANI < 15.5 ) |
(STG < 6.9) &
(ANI < 31.3) |
|
Limit Level |
[(STG
< 2.4) & (ANI <8.9)] AND [ (STG < 3.9) & (ANI < 17.9)] |
|
The ET of this Contract should conduct impact
ecological monitoring as part of EM&A programme according to latest
notification from ENPO when the monitoring transect(s) is/are no longer covered
by another ET of the HZMB project.
2.3.5
If exceedance(s) at these transect(s)
is/are recorded by the ET of the Contract or referred by the other ET under the
HZMB project to the Contract, the ET of the Contract will carry out an
investigation and findings will be reported in the quarterly EM&A Report.
2.4
Event and Action Plans
2.4.1
The event and action plans are provided
in Appendix D.
2.5
Mitigation Measures
2.5.1
Environmental mitigation measures for
the contract were recommended in the approved EIA Report. Appendix E lists the recommended mitigation measures and the
implementation status.