5.1
Summary of exceedance is provided in Appendix K. The details of the exceedances were attached in the
Monthly EM&A Report.
Air Quality
5.2
No Action/Limit Level exceedance was recorded for air quality (24-hr
TSP).
5.3
For 1-hour TSP monitoring, no Limit Level exceedance was recorded. Two
Action Level exceedance was recorded at AMS1 on 17 January 2018.
5.4
According to the investigation, the exceedances are considered not due
to the Contract due to the following reasons:
1)
No observable dust source from construction activity was observed;
2)
High Air Quality Health Index (AQHI) according to EPD (AQHI recorded at
EPD’s Air Quality Monitoring Station in Tung Chung during the 1-hr TSP
monitoring (8:32-14:20) on 17 January 2018 at AMS1 was ranged from (6 to 10+).
The AQHI was recorded with increasing scale from moderate to serious during the
monitoring period which was the dominating factor to the high TSP result;
Dismantling and retrieving metal
casing supports of the temporary platform with insignificant air quality
impacts were conducted at P69-70 which is the nearest site to the monitoring
station (AMS1) under Contract No. HY/2011/09 on 17 January 2018 during the
monitoring period (8:32-14:20), and no exceedance for the 1st 1-hr
TSP (08:32-09:32) was recorded.
Noise
5.5
No Action/Limit Level exceedance was recorded in the reporting period.
Water Quality
5.6
There are Ten Action Level and one Limit Level exceedances were recorded
for suspended solids. No Action/Limit Level exceedance for dissolved oxygen and
turbidity was recorded in the reporting period.
5.7
According to the investigation, the exceedances are
considered not due to the Contract due to the following reasons:
1)
No pollution discharge from construction activity was observed;
2)
The exceeded results were similar or within the ranges baseline
monitoring results;
3)
Sediment plume due to natural fluctuation of shallow water was observed;
4)
Dispersion of sediment plume to the monitoring station from the area
outside the site boundary (i.e. works area not under and related to HY/2011/09)
was observed;
5)
Localized sediment plume due to the rough water condition was observed;
and
6)
Adverse water quality outside the site boundary was observed while no
pollution source from this Contract was observed and no construction vessel for
this Contract was travelling nearby. Dispersion of sediment plume to the
monitoring stations from the area outside the site boundary (i.e. works area
not under and related to HY/2011/09) was also observed.
Dolphin Monitoring (Line-transect Vessel Survey)
5.8
There was an Limit Level exceedance of
dolphin monitoring for the quarterly monitoring data (between December 2017 to
February 2018). According to the investigation report(Appendix K), the exceedance is considered not due to the Contract
5.9
No environmental related complaint was received in the reporting period.
The Complaint Log is attached in Appendix
L.
5.10 There was one prosecution or
notification of summons received since the Contract commencement. Summary of successful prosecution is
attached in Appendix M.