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
For 1-hour TSP monitoring, no Action/Limit Level exceedance was recorded
in the reporting period.
5.3
For 24-hr TSP monitoring, no Action/Limit Level exceedance was recorded
in the reporting period.
Noise
5.4
No Action/Limit Level exceedance was recorded in the reporting period.
Water Quality
5.5
There are twenty three Action Level and twenty nine Limit Level
exceedances were recorded for dissolved oxygen. Six Action Level and two Limit
Level exceedance was recorded for suspended solids and no Action/Limit Level
exceedance for turbidity was recorded in the reporting period.
5.6
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)
Control Station value already exceeded either the Baseline Action or
Limit Levels;
3)
The exceeded results were similar or within the ranges baseline
monitoring results;
4)
Monitoring station is situated at the upstream of the construction sites;
5)
Rough sea condition was recorded during the water quality monitoring.
The low dissolved oxygen results are considered due to the stirring up of
bottom sediments which cause the decomposition of organic matter by bacteria;
6)
Sediment plume due to natural fluctuation of shallow water was observed;
7)
Localized sediment plume due to the rough water condition was observed;
8)
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)
5.7
There was an Action Level exceedance of dolphin monitoring for the
quarterly monitoring data (between June to August 2017). According to
the investigation report(Appendix K),
the exceedance is considered not due to the Contract
5.8
Two environmental related complaint was received in the reporting period.
The Complaint Log is attached in Appendix
L.
5.9
There was one prosecution or notification of summons received since the Contract
commencement. Summary of successful
prosecution is attached in Appendix M.