2.
AIR QUAILITY
MONITORING
2.1
Monitoring Locations
2.1.1
The air quality monitoring works for the Contract
are covered by Contract No. HY/2013/01 ¡§Hong Kong-Zhuhai-Macao-Bridge HKBCF ¡V
Passenger Clearance Building¡¨ and Contract No. HY/2011/03 ¡§Hong Kong-Zhuhai-Macao
Bridge Hong Kong Link Road ¡V 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 AMS6 and AMS7 as part of EM&A programme if these
air quality monitoring stations are no longer covered under Contract No. HY/2013/01
and HY/2011/03. Figure 1 shows the
locations of air monitoring stations.
Table 2.1 Air Quality Monitoring Location
Air Monitoring Station |
Location |
AMS6 |
Dragonair/CNAC
(Group) Building (A80) |
AMS7 |
Hong Kong SkyCity Marriott Hotel |
2.2
Monitoring
Requirements
2.2.1
The monitoring requirements, equipment, parameters,
frequency and duration, methodology, schedule, and meteorological information
are described in the monthly EM&A Reports prepared for Contract No. HY/2013/01
and HY/2011/03.
2.2.2
The Action and Limit levels for 1-hr TSP and 24-hr TSP
are summarized in Table 2.2.
Table 2.2 Action and Limit Levels for Air Quality
Monitoring Station |
Action Level (µg/m³) |
Limit Level (µg/m³) |
1 hour TSP |
||
AMS6 |
360 |
500 |
AMS7 |
370 |
|
24 hours TSP |
||
AMS6 |
173 |
260 |
AMS7 |
183 |
2.2.3
The event and action plan is provided in Appendix D.
2.2.4
If exceedance(s) at these stations 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 monthly EM&A Report.
2.3
Monitoring
Results
2.3.1
The monitoring results for AMS6 and AMS7 are
reported in the monthly EM&A Reports prepared for Contract No. HY/2011/03
and HY/2013/01 respectively.
2.3.2
Summary of Action and Limit Level exceedance of 1-hr
TSP level and 24-hr TSP level at AMS6 shall be referred to the monthly EM&A
report prepared by Contract No. HY/2011/03.
2.3.3
There was no Action and Limit Level exceedances of
1-hr TSP level and 24-hr TSP level recorded at station AMS7 by the
Environmental Team of Contract No. HY/2013/01 during the reporting period.
2.3.4
There were two Action and Limit Level exceedances of
24-hr TSP level recorded at station AMS2 and AMS3B by the Environmental Team of
Contract No. HY/2013/01 during the reporting period.
2.3.5
Regarding the exceedance on 17
January 2018 at AMS2 and AMS3B, the mitigation measures according to Water
Spraying Arrangement in November 2017 are implemented to avoid dust emission.
The Contractor has provided the guideline to remind the site vehicles travel
within speed limit of 8km/hr. For 24-hr TSP exceedance recorded at the station
AMS2 and AMS3B, information available on EPD¡¦s Air Quality Health Index (AQHI)
website shows that the hourly AQHI of Tung Chung station ranged 3 to 10+ (Low
to Very High) on 17 and 18 January 2018 during monitoring period. The AQHI data
is available online at http://www.aqhi.gov.hk/epd/ddata/html/history/2018/201801_Eng.csv. According to the wind data at on-site wind
station, no prevailing wind direction was found in the monitoring period. The
Vehicle Clearance Plazas and Ancillary Buildings and Facilities site of HKBCF
is far away from AMS2 and AMS3B (more than 1km). No potential dust source was
observed near the monitoring station at AMS2 and AMS3B during the monitoring
period. It was unlikely that the works undertaken by Contract No. HY/2013/03
caused 24-hr TSP exceedance recorded at the station AMS2 and AMS3B on 17
January 2018.