4.
SUMMARY OF EXCEEDANCES, COMPLAINTS,
NOTIFICATION OF SUMMONS AND SUCCESSFUL PROSECUTION
4.1
Summary of
Exceedance of the Environmental Quality Performance Limit
4.1.1
Summary of Action and Limit Level exceedance of 1-hr
TSP level and 24-hr TSP level at AMS6 is reported in the monthly EM&A
Reports (for December 2017, January 2018 and February 2018) prepared by
Contract No. HY/2011/03.
4.1.2
There was no Action and Limit Level exceedance of
1-hr TSP level and 24-hr TSP level recorded at station AMS7 and AMS7B (the air
quality monitoring station (AMS7) have been re-located to the alternative air
quality monitoring station (AMS7B) since 06 February 2018) by the Environmental
Team of Contract No. HY/2013/01 during the reporting period.
4.1.3
There was one Action and Limit Level exceedance of
24-hr TSP level recorded at station AMS3B by the Environmental Team of Contract
No. HY/2013/01 on 23 December 2017.
Regarding the exceedance on 23 December 2017, 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 AMS3B, information available on
EPD’s Air Quality Health Index (AQHI) website shows that the hourly AQHI of
Tung Chung station ranged 3 to 8 (Low to Very High) on 23 and 24 December 2017
during monitoring period. The AQHI data is available online at http://www.aqhi.gov.hk/epd/ddata/html/history/2017/201712_ChS.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 AMS3B (more
than 1km). No potential dust source was observed near the monitoring station at
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
AMS3B on 23 December 2017.
4.1.4
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 on 17 January 2018.
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.
4.1.5
There was no Action and Limit Level exceedance of
1-hr TSP level and 24-hr TSP level recorded on other monitoring dates at
station AMS2 and AMS3B by the Environmental Team of Contract No. HY/2013/01
during the reporting period.
4.1.6
There
was no Action and Limit Level exceedance for noise recorded at station NMS2 and
station NMS3B by the Environmental Team of Contract No. HY/2013/01 during the
reporting period.
4.1.7
There
were Action and Limit Level exceedances recorded
at different WQM stations during mid-ebb and mid-flood tide on nine days. The
investigation reports (including the causes of exceedance, action taken and
recommendation for mitigation) for Action or Limit Level Non-compliance were
provided in Appendix I.
Regarding
the exceedance on 04 December 2017, there was no marine transportation on the date
of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box
culvert fully. All sea water flows into the work area of box culvert B will be
treated by desilting facilities before discharge in accordance with the
discharge license approved by EPD for Contract No. HY/2013/03. For SS
exceedance recorded at the WQM station SR6, SR7 and SR10B(N),
the concerned WQM stations where the exceedances were recorded were not close
to the marine works area of Contract No. HY/2013/03, while there was no
notification of exceedance received at the WQM stations closer to the works
areas, such as IS(Mf)11. It was unlikely that the
works undertaken by Contract No. HY/2013/03 caused SS exceedance recorded at
the concerned WQM station during mid-ebb tide and mid-flood tide on 04 December
2017.
Regarding
the exceedance on 06 December 2017, there was no marine transportation on the
date of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box
culvert fully. All sea water flows into the work area of box culvert B will be
treated by desilting facilities before discharge in accordance with the
discharge license approved by EPD for Contract No. HY/2013/03. For SS
exceedance recorded at the WQM station IS8, IS(Mf)9, SR5(N) and SR6, the
concerned WQM stations where the exceedances were recorded were not close to
the marine works area of Contract No. HY/2013/03, while there was no
notification of exceedance received at the WQM stations closer to the works
areas, such as IS(Mf)11. It was unlikely that the
works undertaken by Contract No. HY/2013/03 caused SS exceedance recorded at
the concerned WQM station during mid-flood tide on 06 December 2017.
Regarding
the exceedance on 08 December 2017, there was no marine transportation on the
date of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box
culvert fully. All sea water flows into the work area of box culvert B will be
treated by desilting facilities before discharge in accordance with the
discharge license approved by EPD for Contract No. HY/2013/03. For SS
exceedance recorded at the WQM station IS8, SR4(N),
SR6 and SR10A, the concerned WQM stations where the exceedances were recorded
were not close to the marine works area of Contract No. HY/2013/03, while there
was no notification of exceedance received at the WQM stations closer to the
works areas, such as IS(Mf)11. It was unlikely that
the works undertaken by Contract No. HY/2013/03 caused SS exceedance recorded
at the concerned WQM station during mid-ebb tide and mid-flood tide on 08
December 2017.
Regarding
the exceedance on 11 December 2017, there was no marine transportation on the
date of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box
culvert fully. All sea water flows into the work area of box culvert B will be
treated by desilting facilities before discharge in accordance with the
discharge license approved by EPD for Contract No. HY/2013/03. For SS
exceedance recorded at the WQM station IS(Mf)9, the
concerned WQM stations where the exceedances were recorded were not close to
the marine works area of Contract No. HY/2013/03, while there was no
notification of exceedance received at the WQM stations closer to the works
areas, such as IS(Mf)11. It was unlikely that the
works undertaken by Contract No. HY/2013/03 caused SS exceedance recorded at
the concerned WQM station during mid-ebb tide on 11 December 2017.
Regarding
the exceedance on 13 December 2017, there was no marine transportation on the
date of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box
culvert fully. All sea water flows into the work area of box culvert B will be
treated by desilting facilities before discharge in accordance with the
discharge license approved by EPD for Contract No. HY/2013/03. For SS
exceedance recorded at the WQM station IS8, the concerned WQM stations where
the exceedances were recorded were not close to the marine works area of
Contract No. HY/2013/03, while there was no notification of exceedance received
at the WQM stations closer to the works areas, such as IS(Mf)11.
It was unlikely that the works undertaken by Contract No. HY/2013/03 caused SS
exceedance recorded at the concerned WQM station during mid-ebb tide on 13
December 2017.
Regarding
the exceedance on 20 December 2017, there was marine transportation on the date
of exceedance. Regarding marine transportation, the vessels was sized to make
sure adequate clearance is maintained between vessels and the sea bed at all states
of the tide to ensure that undue turbidity is not generated by turbulence from
vessel movement or propeller wash. For SS exceedance recorded at the WQM
station SR6, the concerned WQM stations where the exceedances were recorded
were not close to the marine delivery route of Contract No. HY/2013/03, while
there was no notification of exceedance received at the WQM stations closer to
the marine delivery route, such as IS(Mf)11. Regarding
marine-based works in Box Culvert B, the work undertaken at the date of
exceedance was preparation work of precast installation which had a cofferdam
to separate seawater and works area. Silt curtain was also maintained to
enclose the work area of the outlet of the box culvert fully. All sea water
flows into the work area of box culvert B will be treated by desilting
facilities before discharge in accordance with the discharge license approved
by EPD for Contract No. HY/2013/03. For SS exceedance recorded at the WQM
station SR6, the concerned WQM stations where the exceedances were recorded
were not close to the marine works area of Contract No. HY/2013/03, while there
was no notification of exceedance received at the WQM stations closer to the
works areas, such as IS(Mf)11. It was unlikely that
the works undertaken by Contract No. HY/2013/03 caused SS exceedance recorded
at the concerned WQM station during mid-flood tide on 20 December 2017.
Regarding
the exceedance on 22 December 2017, there was no marine transportation on the
date of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box culvert
fully. All sea water flows into the work area of box culvert B will be treated
by desilting facilities before discharge in accordance with the discharge
license approved by EPD for Contract No. HY/2013/03. For SS exceedance recorded
at the WQM station SR6, the concerned WQM stations where the exceedances were
recorded were not close to the marine works area of Contract No. HY/2013/03,
while there was no notification of exceedance received at the WQM stations
closer to the works areas, such as IS(Mf)11. It was
unlikely that the works undertaken by Contract No. HY/2013/03 caused SS
exceedance recorded at the concerned WQM station during mid-ebb tide and
mid-flood tide on 22 December 2017.
Regarding
the exceedance on 31 January 2018, there was no marine transportation on the
date of exceedance. Regarding marine-based works in Box Culvert B, the work
undertaken at the date of exceedance was preparation work of precast
installation which had a cofferdam to separate seawater and works area. Silt
curtain was also maintained to enclose the work area of the outlet of the box
culvert fully. All sea water flows into the work area of box culvert B will be
treated by desilting facilities before discharge in accordance with the
discharge license approved by EPD for Contract No. HY/2013/03. For SS
exceedance recorded at the WQM station SR6, the concerned WQM stations where
the exceedances were recorded were not close to the marine works area of
Contract No. HY/2013/03, while there was no notification of exceedance received
at the WQM stations closer to the works areas, such as IS(Mf)11.
It was unlikely that the works undertaken by Contract No. HY/2013/03 caused SS
exceedance recorded at the concerned WQM station during mid-ebb tide on 31
January 2018.
Regarding the exceedance on 02 February
2018, there was no marine transportation on the date of
exceedance. Regarding marine-based works in Box Culvert B, the work undertaken
at the date of exceedance was preparation work of precast installation which
had a cofferdam to separate seawater and works area. Silt curtain was also
maintained to enclose the work area of the outlet of the box culvert fully. All
sea water flows into the work area of box culvert B will be treated by
desilting facilities before discharge in accordance with the discharge license
approved by EPD for Contract No. HY/2013/03. For SS exceedance recorded at the
WQM station SR6 and SR7, the concerned WQM stations where the exceedances were
recorded were not close to the marine works area of Contract No. HY/2013/03,
while there was no notification of exceedance received at the WQM stations
closer to the works areas, such as IS(Mf)11. It was
unlikely that the works undertaken by Contract No. HY/2013/03 caused SS
exceedance recorded at the concerned WQM station during mid-flood tide on 02
February 2018.
After
investigation, it was concluded that the exceedances were not related to Contract
No. HY/2013/03 due to the above reasons. There was no Action and Limit Level
exceedance recorded on other monitoring dates at the monitoring stations shown
as shown at Table 2.2 by the
Environmental Team of Contract No. HY/2013/01 during the reporting period.
Although
the exceedances were not relevant to Contract No. HY/2013/03, the Contractor
was reminded to continue to fully maintain all water quality mitigation
measures and ensure the silt curtain is fully maintained to prevent any water
quality impact to seawater.
4.1.8
Ecological monitoring results at all transects are
reported in the EM&A report (for the reporting period) prepared by Contract
No. HY/2013/01.
4.2
Summary of
Complaints, Notification of Summons and Successful Prosecution
4.2.1
There
were no complaints received in relation to the environmental impact during the
reporting period. The details of cumulative statistics of Environmental
Complaints are provided in Appendix J.
4.2.2
No notification of summons or
prosecutions was received during the reporting period.
4.2.3
Statistics
on notifications of summons and successful prosecutions are summarized in Appendix J.