1.
This Baseline Environmental
Monitoring Report is prepared by Cinotech Consultants Ltd.
for the project “Contract No. HY/2011/09 – Hong
Kong-Zhuhai-
2.
According to the Environmental Monitoring and Audit Manual for Hong Kong Link Road (EM&A
Manual), the baseline
air quality, noise, water quality and ecological (Chinese White Dolphin
Monitoring) monitoring at the designated monitoring stations as required in
EM&A Manual have already been conducted in 2011, under
Agreement No. CE 35/2011 (EP) – Baseline Environmental Monitoring for Hong Kong
– Zhuhai – Macao Bridge Hong Kong Bridge Hong Kong
Projects – Investigation prior to the commencement of Contract.
3.
There are a total of two air
quality monitoring stations, two noise monitoring station and fourteen water
quality monitoring stations and one survey area (West Lantau)
for line transect monitoring for the Contract. As these environmental
monitoring locations (except water quality monitoring station, SRA) were also
covered in the baseline environmental monitoring in 2011. The baseline
monitoring data in 2011 are considered suitable to be adopted for the Contract.
4.
In addition, the baseline for
underwater noise and dolphin north-south movement were conducted for the
Contract in accordance with the EM&A Manual. Baseline for dolphin acoustic
behaviour monitoring was also conducted. Baseline water quality monitoring at
additional monitoring station (SRA) was carried out according to Supporting
Document for Variations of EP (EP-352/2009).
5.
Therefore, this report presents
the baseline environmental monitoring works conducted in 2011, baseline monitoring results for underwater noise, dolphin
north-south movement, dolphin acoustic behaviour and
baseline water quality monitoring results at SRA.
6.
The baseline environmental
monitoring works for the parameters of 1-hour
and 24-hour Total Suspended Particulates (TSP), noise, water quality conducted at each monitoring stations and ecology (Chinese
White Dolphin Monitoring) under the Contract are presented in Table I to Table IV and the baseline
environmental monitoring works for underwater
noise, dolphin north-south movement and dolphin acoustic behaviour are
presented in Section 11 to 13.
Table I Baseline Air Quality Monitoring
Period
|
Designated Monitoring Stations under Contract |
Baseline Monitoring Period |
|
AMS 1 -
Sha Lo Wan |
|
|
AMS 4 - San Tau |
|
7.
During the monitoring, there was no major
dust generating activities undertaken in the vicinity of the monitoring
stations. Data
collected was reviewed and analyzed to determine the Action and Limit Levels
for air quality during impact monitoring throughout the construction of the Contract. Details
of the methodology, locations and results are presented in the report.
Table II Baseline
Noise Monitoring Period
|
Designated Monitoring Stations under Contract |
Baseline
Monitoring Period |
|
NMS 1 - Sha Lo Wan |
|
|
NMS 4 - San Tau |
|
8.
Monitoring
data collected was reviewed and analyzed.
Details of the locations and results are presented in this report. The
baseline noise monitoring data was processed according to the following
periods:
·
Daytime: 0700-1900 hrs on normal weekdays
·
Evening-time: 1900-2300 hrs
·
Holiday-time: 0700-1900 hrs on holidays
·
Night-time: 2300-0700 hrs of next day
Table III Baseline
Water Quality Monitoring Period
|
Designated Monitoring Stations under Contract |
Parameters,
unit |
Baseline
Monitoring Period |
|
14
monitoring stations: IS1, IS2, IS3, IS4, SR1,
SR2, SR3, SR6, *SRA, CS1,
CS2, ST1, ST2, ST3 |
·
Temperature(°C) ·
pH(pH unit) ·
turbidity (NTU) ·
water depth (m) ·
salinity (ppt) ·
dissolved
oxygen (DO) (mg/L and % of saturation) ·
suspended
solids (SS) (mg/L) |
*SRA: (3 days per week, at mid-flood and mid-ebb tides, for a period of 4 weeks prior to the commencement of the
marine works) |
* Additional
monitoring points from EM&A Manual
9.
The data was processed,
reviewed and analyzed to establish the Action and Limit Levels for dissolved oxygen,
turbidity and suspended solids for impact monitoring
throughout the construction of the Contract.
Dolphin
Monitoring (Line-transect Vessel Surveys)
Table IV Baseline Dolphin Monitoring Period
|
Date of
Baseline Dolphin Monitoring |
Survey Area |
|
|
1 |
|
W LANTAU + NW LANTAU |
|
2 |
|
NW LANTAU + NE LANTAU |
|
3 |
|
NW LANTAU + NE LANTAU |
|
4 |
|
W LANTAU + NW LANTAU |
|
5 |
|
NE LANTAU + NW LANTAU |
|
6 |
|
NW LANTAU + NE LANTAU |
|
7 |
|
NE LANTAU |
|
8 |
|
W LANTAU + NW LANTAU |
|
9 |
|
NW LANTAU + W LANTAU |
|
10 |
|
NW LANTAU + NE LANTAU |
|
11 |
|
W LANTAU + NW LANTAU |
|
12 |
|
NW LANTAU + NE LANTAU |
|
13 |
|
NE LANTAU |
|
14 |
|
NW LANTAU + W LANTAU |
* NW Lantau = Northwest Lantau Survey
Area, NE Lantau = Northeast Lantau
Survey Area, W Lantau =
10.
Summary of findings are presented
in Section 6 and details of the methodology, locations and results can be referred
to the Baseline
Monitoring Report for HY/2010/02
Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing
Facilities – Reclamation Works (HKBCF).
11.
Baseline underwater noise
monitoring was conducted from 24th November 2012 to 22nd December 2012 for 28 continuous days at a monitoring station
near
one of the first three bored piling sites. Summary of findings are presented in
Section 6 and details of the methodology, locations and results can be referred
to the Baseline
Underwater Noise Monitoring Report in Appendix
E.
Dolphin North-South Movement Monitoring
12.
Baseline land-based dolphin
behaviour and movement monitoring was conducted from 29th December 2012 to 30th
January 2013 using theodolite tracking technique at Sham
Wat station. Summary of findings are
presented in Section 7 and details of the methodology, locations and results
can be referred to the Baseline Land-based Dolphin Behaviour and Movement Monitoring Report in Appendix F.
Dolphin Acoustic Behaviour Monitoring
13.
Baseline dolphin acoustic behaviour
monitoring was conducted from 15th January to 22nd
February 2013. The dolphin acoustic activities measured using both acoustic survey
and passive acoustic monitoring methods. Summary of findings are presented in
Section 8 and details of the methodology, locations and results can be referred
to the Baseline Dolphin Acoustic Behaviour Monitoring Report in Appendix H.