Contents
Executive Summary..............................................................................................................iv
1.0 INTRODUCTION.................................................................................................................. 1
1.1 Purpose of the Report............................................................................................................ 1
1.2 Report Structure..................................................................................................................... 1
2.0 PROJECT INFORMATION.................................................................................................. 2
2.1 Background............................................................................................................................ 2
2.2 Site Description...................................................................................................................... 2
2.3 Construction Programme and Activities................................................................................ 3
2.4 Project Organisation.............................................................................................................. 3
2.5 Status of Environmental Licenses, Notification and
Permits................................................. 4
3.0 Air quality monitoring.............................................................................................. 5
3.1 Monitoring Requirement......................................................................................................... 5
3.2 Monitoring Equipment............................................................................................................. 5
3.3 Monitoring Location................................................................................................................ 5
3.4 Monitoring Parameters, Frequency and Duration.................................................................. 6
3.5 Monitoring Methodology.......................................................................................................... 6
3.6 Monitoring Schedule for the Reporting month........................................................................ 7
3.7 Monitoring Results.................................................................................................................. 7
4.0 Noise Monitoring.......................................................................................................... 8
4.1 Monitoring Requirements....................................................................................................... 8
4.2 Monitoring Equipment............................................................................................................. 8
4.3 Monitoring Locations.............................................................................................................. 8
4.4 Monitoring Parameters, Frequency and Duration.................................................................. 8
4.5 Monitoring Methodology.......................................................................................................... 9
4.6 Monitoring Schedule for the Reporting Month........................................................................ 9
4.7 Monitoring Results.................................................................................................................. 9
5.0 Water Monitoring...................................................................................................... 11
5.1 Monitoring Requirements..................................................................................................... 11
5.2 Monitoring Equipment........................................................................................................... 11
5.3 Monitoring Parameters, Frequency and Duration................................................................ 11
5.4 Monitoring Locations............................................................................................................ 11
5.5 Monitoring Methodology........................................................................................................ 12
5.6 Monitoring Schedule for the Reporting Month...................................................................... 12
5.7 Monitoring Results................................................................................................................ 12
6.0 WASTE MANAGEMENT..................................................................................................... 14
7.0 ENVIRONMENTAL
SITE INSPECTION AND AUDIT...................................................... 15
7.1 Site Inspection...................................................................................................................... 15
8.0 IMPLEMENTATION
STATUS OF ENVIRONMENTAL MITIGATION MEASURES....... 17
9.0 ENVIRONMENTAL NON-CONFORMANCE.................................................................... 18
9.1 Summary of Monitoring Exceedances................................................................................. 18
9.2 Summary of Environmental Non-Compliance..................................................................... 18
9.3 Summary of Environmental Complaints.............................................................................. 18
9.4 Summary of Environmental Summon and Successful
Prosecutions................................. 18
10.0 FUTURE KEY ISSUES....................................................................................................... 19
10.1 Construction Programme for the Next Month...................................................................... 19
10.2 Key Issues for the Coming Month........................................................................................ 19
10.3 Monitoring Schedule for the Next Month............................................................................... 19
11.0 CONCLUSIONS AND
RECOMMENDATIONS................................................................ 20
11.1 Conclusions......................................................................................................................... 20
11.2 Recommendations............................................................................................................... 20
Table
2.1 Contact
Information of Key Personnel
Table
2.2 Status
of Environmental Licenses, Notifications and Permits
Table
3.1 Air
Quality Monitoring Equipment
Table
3.2 Location
of Air Quality Monitoring
Table
3.3 Air
Quality Monitoring Parameters, Frequency and Duration
Table
3.4 Summary
of 1-hr TSP Monitoring Results
Table
3.5 Summary
of 24-hr TSP Monitoring Results
Table
4.1 Noise
Monitoring Equipment
Table
4.2 Location
of Noise Monitoring
Table
4.3 Noise
Monitoring Parameters, Frequency and Duration
Table
4.4 Summary
of Noise Monitoring Results
Table
5.1 Water
Quality Monitoring Equipment
Table
5.2 Water
Quality Monitoring Parameters, Frequency and Duration
Table
5.3 Locations
of Water Quality Monitoring
Table
5.4 Action
and Limit Levels for Water Quality Monitoring
Table
7.1 Observations
and Recommendations of Site Audit
Table
8.1 Status
of Required Submission under Environmental Permit
List of Figures
Figure 2 Air
and Noise Monitoring Locations
Figure 3 Water
Quality Monitoring
Locations
List of Appendices
Appendix A Construction
Programme
Appendix B Project
Organization Structure
Appendix C Calibration
Certificates of Monitoring Equipment
Appendix D EM&A
Monitoring Schedules
Appendix E Air
Quality Monitoring Results and their Graphical Presentation
Appendix F Summary
of Event and Action Plan
Appendix G Noise
Monitoring Results and their Graphical Presentation
Appendix H Laboratory
Results for Water Quality
Appendix I Water
Quality Monitoring Results and their Graphical Presentation
Appendix K Implementation
Schedule of Environmental Mitigation Measures (EMIS)
Appendix L Investigation
Report for Exceedances
Appendix M Statistics
on Complaints, Notifications of Summons and Successful Prosecutions
Executive Summary
The Entrusted
Portion of Widening of Tolo Highway / Fanling Highway between Island House
Interchange and Fanling Stage 2 (hereafter called ¡§the Project¡¨) covers part of
the construction of the widening of Tolo Highway / Fanling Highway between Island House
Interchange and Fanling which aimed to widen Tolo Highway and Fanling Highway
to dual 4-lane carriageway in order to alleviate the current traffic congestion
problems and to cope with the increasing transport demands to and from the
urban areas and also cross boundary traffic. The Project covers construction
activities at Yuen Leng along the existing
The impact
EM&A for the Project includes air quality, noise and water quality
monitoring. The EM&A programme
commenced on 5 November 2013.
This report
documents the findings of EM&A works conducted in the period between 5 and
30 November 2013. As informed by the Contractor, the major activities in the
reporting period were:
-
Hoarding
and fencing erection, initial survey and base slab demolition;
-
Site
clearance and tree felling;
-
Excavation
works and base slab demolition;
-
Pre-drilling
works; and
-
Box
culvert extension works ¡V Flow diversion of existing stream, base and wall slab
construction.
Breach of
Action and Limit Levels for Air Quality
Two (2) Action Level exceedances of 24-hour TSP
monitoring were recorded on 16 and 22 November 2013 while one (1) Limit Level
exceedance was recorded on 28 November 2013 at the monitoring location (SR77)
in the reporting month. Investigation reports of the exceedances are being
prepared, and it will be reported during next reporting period.
No exceedance of Action and Limit Level was recorded
for 1-hour TSP monitoring at the monitoring location (SR77) in the reporting
month.
Breach of
Action and Limit Levels for Noise
No Action Level exceedance was recorded since no noise
related complaint was received in the reporting month.
No exceedance of Limit Level of noise was recorded at the
monitoring location (SR77) in the reporting month.
Breach of
Action and Limit Levels for Water Quality
Two (2) exceedances of water quality limit (i.e.
Action Level) of DO were recorded on 9 and 18 November 2013 at the impact monitoring
location (I5) in the reporting month. Investigation of the exceedances had been
conducted which concluded that the exceedances were not due to the Project
works. The investigation reports are presented in Appendix L.
Complaint, Notification of Summons and Successful
Prosecution
A complaint regarding water quality of Ma Wat
River was received on 26 November 2013. The ET had conducted investigation for
the complaint which was considered as an invalid complaint under this Project.
Reporting Change
There was no reporting of change recorded in
this reporting month.
Future Key
Issues
Key issues to be considered in the coming month are
anticipated to include:
-
Hoarding
and fencing erection, initial survey and base slab demolition;
-
Site
clearance and tree felling;
-
Excavation
works and base slab demolition;
-
Pre-drilling
works; and
-
Box
culvert extension works ¡V Flow diversion of existing stream, base and wall slab
construction.
Potential
environmental impacts arising from the above construction activities are anticipated
to be mainly associated with construction dust, noise, water quality and waste
management.
Chun Wo Construction &
Engineering Co Ltd (Chun Wo) was commissioned by the Civil Engineering and Development Department (CEDD)
as the Civil Contractor for the Entrusted Portion of Widening of Tolo Highway /
1.1.1
This
is the first monthly EM&A Report which summaries the impact monitoring
results and audit findings for the Project during the reporting period from 5
to 30 November 2013.
1.2.1
This
monthly EM&A Report comprises the following sections:
¡P
Section
1: Introduction
¡P
Section
2: Project
Information
¡P
Section
3: Air Quality
Monitoring
¡P
Section 4: Noise Monitoring
¡P
Section 5: Water Monitoring
¡P
Section 6: Waste Management
¡P
Section 7: Environmental Site Inspection and Audit
¡P
Section 8: Implementation Status of Environmental
Mitigation Measures
¡P
Section
9: Environmental
Non-conformance
¡P
Section
10: Future Key Issues
¡P
Section
11: Conclusions and Recommendations
2.1.1
2.1.2
The
objective of the Widening of Tolo Highway /
2.1.3
The
construction works for the Widening of Tolo Highway /
¡P
Stage
1 ¡V Construction works between Island House Interchange and Tai Hang; and
¡P
Stage
2 ¡V Construction works between Tai Hang and Wo Hop Shek Interchange.
2.1.4
The
construction works of Stage 1 under the EP commenced in November 2009 and was planned
to be completed in December 2013 tentatively. The works of Stage 2 was planned to
commence in November 2013 and complete by end of 2016. Hyder-Arup-Black and Veatch Joint
Venture (HABVJV) was appointed by the Highways Department (HyD) as the
consultants for the design and construction assignment for the Project. Mott MacDonald Hong Kong Ltd is the
Independent Environmental Checker (IEC) of both Stage 1 and Stage 2 works.
2.1.5
A
portion of Stage 2 works of Widening of Tolo Highway /
2.1.6
The
Project is a Designated Project under the Environmental Impact Assessment Ordinance
(EIAO) (Cap. 499). An Environmental Impact Assessment (EIA) Report together
with an Environmental Monitoring and Audit (EM&A) Manual were approved on
14 July 2000 (Register Number: EIA-043/2000). The Project is governed by an
Environmental Permit (EP) (EP-324/2008) which was granted on 23 December
2008. A variation of EP (VEP) was
applied and a VEP (EP-324/2008/A) was subsequently granted on 31 January 2012.
2.2.1
The
major construction activities under the Entrusted Portion of Widening of Tolo
Highway /
¡P
At-Grade
Road Works ¡V Temporary and permanent road formation, pipe laying, road drainage,
footpath and noise barrier construction;
¡P
Demolition
of existing Kiu Tau Footbridge and Footbridge Reprovision; and
¡P
Box
Culvert Extension ¡V Flow diversion of existing stream, excavation, sub-base and
blinding, base, wall and top slab construction.
2.2.2
Figure 1 shows the works areas for the Entrusted Portion of Widening of Tolo
Highway /
2.3.1
The
major construction activities undertaken in the reporting month are summarized
below:
-
Hoarding
and fencing erection, initial survey and base slab demolition;
-
Site
clearance and tree felling;
-
Excavation
works and base slab demolition;
-
Pre-drilling
works; and
-
Box
culvert extension works ¡V Flow diversion of existing stream, base and wall slab
construction.
2.3.2
The
construction programme is presented in
Appendix A.
2.4.1
The
project organization structure is shown in Appendix
B. The key personnel contact names and numbers for the Project are
summarised in Table 2.1.
Table 2.1 Contact
Information of Key Personnel
Party |
Role |
Position |
Name |
Telephone |
Fax |
AECOM |
Engineer¡¦s Representative |
Senior Resident Engineer |
Mr. Alan Lee |
2472 7228 |
2472 0132 |
Resident Engineer (Environmental) |
Mr. Perry Yam |
2674 2273 |
-- |
||
Mott MacDonald |
Independent Environmental Checker (IEC) |
IEC |
Mr. Terence Kong |
2828 5919 |
2827 1823 |
Chun Wo |
Contractor |
Site Agent |
Mr. Daniel Ho |
2638 6144 |
2638 7077 |
Environmental Officer |
Mr Victor Huang |
2638 6115 |
|||
Environmental Officer |
Mr Sam Lam |
2638 6147 |
|||
Meinhardt |
Environmental Team (ET) |
ET Leader |
Mr. Fredrick Leong |
2859 1739 |
2540 1580 |
2.5.1
The
relevant environmental licenses, permits and/or notifications on environmental
protection for this Project and valid in the reporting month are summarized in Table 2.2.
Table 2.2 Status of
Environmental Licenses, Notifications and Permits
Permit
/ License No. / Notification/ Reference
No. |
Valid
Period |
Status |
Remarks |
|
From |
To |
|||
Environmental
Permit |
||||
EP-324/2008/A |
31
Jan 2012 |
-- |
Valid |
-- |
Construction Noise Permit |
||||
GW-RN0663-13 |
17 Nov 2013 |
19 Jan 2014 |
Valid |
For a section of |
Wastewater Discharge License |
||||
WT00016832-2013 |
28 Aug 2013 |
31 Aug 2018 |
Valid |
-- |
Chemical Waste Producer
Registration |
||||
5113-634-C3817-01 |
7 Oct 2013 |
-- |
Valid |
-- |
Billing Account for Construction
Waste Disposal |
||||
7017914 |
2 Aug 2013 |
-- |
Account Active |
-- |
Notification Under
Air Pollution Control (Construction Dust) Regulation |
||||
-- |
31 Jul 2013 |
30 Jul 2019 |
Notified |
-- |
3.1.1
In
accordance with the Updated EM&A Manual, 1-hr and 24-hr total suspended
particulate (TSP) levels at the designated air quality monitoring station are
required. Impact 24-hour TSP monitoring should be carried out for at least once
every 6 days. For the 1-hr TSP impact monitoring, the sampling frequency of at
least three times in every 6 days should be undertaken when the highest dust
impact occurs.
3.2.1
The
24-hr TSP air quality monitoring was performed using a High Volume Sampler
(HVS), of which its location and operation satisfy, as far as practicable, all
the requirements as specified in the Updated EM&A Manual. A portable direct reading dust meter, which
was proven to be capable of achieving comparable results as that of the HVS, was
used to carry out the 1-hr TSP monitoring. The brand and model of the equipment
are given in Table 3.1.
Table 3.1 Air Quality Monitoring Equipment
Equipment |
Brand and Model |
Quantity |
Serial Number |
Portable direct reading dust meter (1-hr TSP) |
Sibata Digital Dust Monitor (Model No. AM 510) |
1 |
11302029 |
High Volume Sampler |
Tisch Total Suspended Particulate Mass Flow
Controlled High Volume Air Sampler (Model No. TE-5170 MFC) |
1 |
2359 |
3.2.2
The
HVS and its accessories were maintained in good working condition, such as
replacing motor brushes routinely and checking electrical wiring to ensure a
continuous power supply.
3.2.3
Calibration
of the HVS (five point calibration) using Calibration Kit was carried out every
two months. The HVS calibration orifice and the portable direct reading dust
meter will be calibrated annually. Calibration certificate of the TE-5025A Calibration
Kit, the portable direct reading dust meter and the HVS are provided in Appendix C.
3.3.1
Air
quality monitoring was conducted at the location specified in the Updated
EM&A Manual. Table 3.2 describes
the details of the air quality monitoring station with its location as shown in
Figure 2.
Table 3.2 Location
of Air Quality Monitoring
Air
Monitoring Station ID |
Monitoring Location |
Description |
AM1(1);
SR77(1) |
Yuen Leng 2(1) |
Residential,
Ground floor |
Remark:
(1) Location /
Station / ASR ID as identified in Updated EM&A Manual / EIA Report for
Widening of
3.4.1
Table 3.3 summarizes the monitoring
parameters, frequency and duration of impact TSP monitoring.
Table
3.3 Air
Quality Monitoring Parameters, Frequency and Duration
Parameter |
Frequency and Duration |
1-hour TSP |
At
least three times in every 6 days should be undertaken when the highest dust
impact occur |
24-hour TSP |
Once
every 6 days |
24-hr TSP Monitoring
3.5.1
With
the consideration of criteria stated in the Updated EM&A Manual, the HVS
was installed in the vicinity of the air sensitive receivers.
3.5.2
The
relevant data including temperature, pressure, weather conditions, elapsed-time
meter reading for the start and stop of the sampler, identification and weight
of the filter paper, and any special phenomena observed were recorded. The
weather information was referenced from Hong Kong Observatory (http://www.weather.gov.hk/wxinfo/pastwx/extractc.htm).
3.5.3
A
HOKLAS accredited laboratory, ALS Technichem (HK) Pty Ltd (HOKLAS no.: 066),
with constant temperature and humidity control, and equipped with necessary
measuring and conditioning instruments, to handle the 24-hr TSP samples, was
employed for sample analysis, and equipment calibration and maintenance.
3.5.4
Filter
papers of size 8"x10" were labelled before sampling. They were
inspected to be clean with no pin holes and conditioned in a humidity
controlled chamber for over 24-hr and were pre-weighed before use for the
sampling.
3.5.5
The
24-hr TSP levels were measured by following the standard high volume sampling
method for TSP as set out in the Title 40 of the United States Code of Federal
Regulations, Chapter 1 (Part 50), Appendix B. TSP was sampled by drawing air through a
conditioned, pre-weighted filter paper inside the HVS at a controlled air flow
rate. After 24-hr sampling, the
filter papers loaded with dust were kept in a clean and tightly sealed plastic
bag, and then returned to the laboratory for reconditioning in the humidity
controlled chamber followed by accurate weighing by an electronic balance with
a readout down to 0.1 mg.
3.5.6
All
the collected samples were kept in a good condition for 6 months before
disposal.
1-hr TSP
Monitoring
3.5.7
The
1-hr TSP measurement followed manufacturer¡¦s instruction manual. Before
initiating a measurement, zeroing the portable dust monitor was carried out to
ensure maximum accuracy of concentration measurements.
3.5.8
The
1-hr TSP was sampled by drawing air into the portable dust monitor where
particular concentrations were measured instantaneously with an in-built
silicon detector sensing light scattered by the particulates in the sampled
air. Continuous TSP levels were indicated and logged by a built-in data logger
compatible with Windows based program to facilitate data collection, analysis
and reporting.
3.6.1
The
schedule for environmental monitoring in November 2013 is provided in Appendix D.
3.7.1
The
monitoring results for 1-hr and 24-hr TSP are summarised in Tables 3.4 and 3.5 respectively.
Detailed air quality monitoring results and graphical presentation of
air quality monitoring data are presented in Appendix E.
Table
3.4 Summary
of 1-hr TSP Monitoring Results
1-hr TSP Levels |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
SR77 (AM1) (1) |
112.7 |
83.0 ¡V 155.0 |
292.7 |
500 |
Remark:
(1) Station /
ASR ID as identified in Updated EM&A Manual / EIA Report for Widening of
Tolo Highway/Fanling Highway between Island House Interchange and Fanling
Table 3.5 Summary of 24-hr
TSP Monitoring Results
ASR ID |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
SR77 (AM1) (1) |
163.4 |
61.1 ¡V 282.2 |
170.3 |
260 |
Remark:
(1) Station /
ASR ID as identified in Updated EM&A Manual / EIA Report for Widening of
Tolo Highway/Fanling Highway between Island House Interchange and Fanling
3.7.2
Two
(2) Action Level exceedances of 24-hour TSP monitoring were recorded on 16 and
22 November 2013 while one (1) Limit Level exceedance was recorded on 28
November 2013 at the monitoring location (SR77) in the reporting month.
Investigation reports of the exceedances are being prepared, and it will be
reported during next reporting period.
3.7.3
No exceedance of Action and Limit
Level was recorded for 1-hour TSP monitoring at the monitoring location (SR77)
in the reporting month.
3.7.4
The
Event and Action Plan for the occurrence of non-compliance of the air quality
criteria is annexed in Appendix F.
3.7.5
Details
of influencing factors such as weather conditions and site observation are
presented in Appendix E.
4.1.1
In
accordance with the Updated EM&A Manual, the impact noise monitoring
frequency shall depend on the scale of the construction activities. An initial
guide on the regular monitoring frequency should be at least once per week when
noise generating activities are underway.
4.2.1
Noise
monitoring was performed using a sound level meter at the monitoring station.
The sound level meter deployed complies with the International Electrotechnical
Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications.
An acoustic calibrator was deployed to check the sound level meter at a known
sound pressure level. The brand and model of the equipment is given in Table 4.1.
Table
4.1 Noise
Monitoring Equipment
Equipment |
Brand and Model |
Quantity |
Serial Number |
Integrated Sound Level Meter |
Rion (Model No. NL-52) |
1 |
00220553 |
Acoustic Calibrator |
B&K (Model No. 4231) |
1 |
2685684 |
4.2.2
The
sound level meter and acoustic calibrator were verified by the certified
laboratory once every two years. Calibration certificates of the sound level
meter and acoustic calibrator are provided in Appendix C.
4.3.1
Impact
noise monitoring was conducted at the location specified in the Updated
EM&A Manual. Table 4.2 describes
the details of the noise monitoring station with its location as shown in Figure 2.
Table
4.2 Location
of Noise Monitoring
Noise
Monitoring Station ID |
Monitoring Location |
Description |
M1(1),
SR77(1) |
Yuen Leng 2(1) |
Residential,
Ground floor |
Remark:
(1) Location /
Station / NSR ID as identified in Updated EM&A Manual / EIA Report for
Widening of Tolo Highway/Fanling Highway between Island House Interchange and
Fanling
4.4.1
Table 4.3 summarizes the monitoring
parameters, frequency and duration of impact noise monitoring.
Table
4.3 Noise
Monitoring Parameters, Frequency and Duration
Parameter and Duration |
Frequency |
30-mins measurement at between 0700
and 1900 on normal weekdays. Leq, L10 and L90
would be recorded. |
At least
once per week |
4.5.1
The
monitoring procedures are summarised as below:
(a)
The
microphone head of the sound level meter was positioned 1m exterior of the
noise sensitive facade and lowered sufficiently so that the building¡¦s external
wall acts as a reflecting surface.
(b)
The
battery condition was checked to ensure good functioning of the meter.
(c)
Parameters
such as frequency weighting, the time weighting and the measurement time were
set as follows:
(i)
frequency
weighting: A
(ii)
time
weighting: Fast
(iii)
parameters:
Leq, L10 and L90
(iv)
time
measurement: Leq(30-minutes) during non-restricted hours i.e. 07:00 ¡V 1900 hrs
on normal weekdays; Leq(5-minutes) during restricted hours i.e. 19:00
¡V 23:00 hrs and 23:00 ¡V 07:00 hrs of normal weekdays, whole day of Sundays and
Public Holidays
(d)
Prior to
and after each noise measurement, the meter was calibrated using the acoustic
calibrator for 94dB(A) at 1000 Hz. If the difference in the calibration level
before and after measurement was more than 1dB(A), the measurement would be considered
invalid and repeat of noise measurement would be required after re-calibration
or repair of the equipment.
(e)
At the
end of the monitoring period, the Leq, L10 and L90 were recorded. In addition,
site conditions and noise sources were recorded on a standard record sheet.
(f)
A façade
correction of +3dB (A) shall be made to the noise parameter obtained by free
field measurement.
4.6.1
The schedule for environmental monitoring in
November 2013 is provided in Appendix D.
4.7.1
The monitoring results for noise are
summarized in Table 4.4 and the
monitoring data and the graphical presentation of noise level monitoring data
are presented in Appendix G.
Table
4.4 Summary
of Noise Monitoring Results
Noise
Monitoring Station ID |
Average, dB(A), Leq (30min) (2) |
Range, dB(A), |
Action Level |
Limit Level, dB(A) |
SR77 (M1)(1) |
70.1 |
67.6 ¡V 71.5 |
When one
documented valid complaint is received |
75 |
Remark:
(1) Station /
NSR ID as identified in Updated EM&A Manual / EIA Report for Widening of
Tolo Highway/Fanling Highway between Island House Interchange and Fanling
(2) +3dB(A)
façade correction included
4.7.2
Major noise sources during the noise
monitoring included construction activities of the Project and that along
4.7.3
No noise complaint was received in
the reporting month; hence, no Action Level exceedance was recorded.
4.7.4
No Limit Level exceedance of noise
was recorded in the reporting month.
4.7.5
The Event and Action Plan for the occurrence of
non-compliance of the noise criteria is annexed in Appendix F.
5.1.1
In
accordance with the Updated EM&A Manual, during the course of the culvert
extension works, monitoring shall be undertaken on three occasions per week.
The interval between two sets of monitoring shall not be less than 36 hours
except where there are exceedances of Action and/or Limit levels.
5.2.1
The
equipment used in the water quality monitoring programme is summarised in Table
5.1.
Table
5.1 Water
Quality Monitoring Equipment
Equipment |
Model and Make |
Multimeter
(Scope of Test: Conductivity, Dissolved Oxygen, pH, Salinity and Temperature) |
YSI Proplus (Serial no. 10D101565) |
Turbidity
meter |
HACH
Model 2100 Q (Serial
no. 12010C015757) |
5.2.2
The
monitoring instruments were checked, calibrated and certified by a laboratory
accredited under HOKLAS before use and subsequently re-calibrated at 3-monthly
intervals throughout all stages of the water quality monitoring. Copies of the
calibration certificates for the water quality monitoring equipment are
attached in Appendix C.
5.3.1
Measurements
for each monitoring station were conducted 3 days per week for 4 weeks between
5 November 2013 and 30 November 2013. Table
5.2 summarises the monitoring parameters, frequency and duration of the
baseline water quality monitoring.
Table
5.2 Water Quality
Monitoring Parameters, Frequency and Duration
Monitoring Stations |
Parameter, unit |
Frequency |
Control Stations: C3a and C3b Impact Station: I5 |
¡P
Depth, m ¡P
Temperature, ¢XC ¡P
Salinity, ppt ¡P
pH ¡P
DO, mg/L ¡P
DO Saturation, % ¡P
Turbidity, NTU ¡P SS, mg/L |
3 days per week |
5.4.1
According
to the Updated EM&A
Manual, measurements were taken at all impact and control stations as summarised
in Table 5.3. The locations of the
monitoring stations are shown in Figure
3.
Table
5.3 Locations of
Water Quality Monitoring
Station |
Description |
Easting |
Northing |
I5 |
Downstream of Ma (Yuen Leng) |
833931 |
837859 |
C3a |
Upstream of Ma ( |
833816 |
837644 |
C3b |
Upstream of Ma (Yuen Leng) |
833931 |
837736 |
Instrumentation
5.5.1
The
parameters of in-situ measurements
included water depth,
dissolved oxygen (DO), dissolved oxygen saturation (DOS), turbidity level, pH
value and water temperature.
Operating/Analytical Procedures
5.5.2
Since
water depths for all monitoring stations were less than 1m throughout the whole
baseline measurement period, only mid-depth level was monitored.
5.5.3
At
each monitoring station, at least duplicate readings of dissolved oxygen
content and turbidity were taken. The probes were retrieved out of the water
after the first measurement and then re-deployed for the second measurement.
5.5.4
Water
samples were collected by the water sampler and filled into polyethylene
bottles for laboratory determination of suspended solids. Sampling bottles were
pre-rinsed with the same water samples, and filled up to the rim, capped
tightly and labeled immediately. The sample bottles were then packed into a
cool-box kept at 4¢XC, and delivered to a HOKLAS accredited laboratory, ALS
Technichem (HK) Pty Ltd for analysis. The results for laboratory analysis of
suspended solids are presented in Appendix
H.
5.6.1
The schedule for environmental monitoring in
November 2013 is provided in Appendix D.
5.7.1
The
water quality criteria, namely Action and Limit Levels, as specified in the
Updated EM&A Manual are shown in Table 5.4.
Table
5.4 Action
and Limit Levels for Water Quality Monitoring
Parameters |
Action |
Limit |
DO in mg/L |
6.7 mg/L |
4 mg/L or 40% saturation at 15 degree Celsius |
SS in mg/L |
42.6 mg/L or
120% of upstream control station¡¦s SS of the same day |
46.8 mg/L or 130% of upstream station¡¦s SS of the
same day and specific sensitive receiver water quality requirements |
Turbidity (Tby) in NTU |
81.9 mg/L or 120% of upstream control station¡¦s
Tby of the same day |
91.9 mg/L or 130% of upstream control station¡¦s
Tby of the same day |
Notes:
5.7.2
The detailed water quality monitoring results and
graphical presentation of water quality monitoring data are presented in Appendix I.
5.7.3
The
possible influences in monitoring results were suspected to be the domestic
discharges, and possible erosion of silt after rainfall at up-stream locations.
5.7.4
Two (2) exceedances of water quality
limit (i.e. Action Level) of DO were recorded on 9 and 18 November 2013 in the
reporting month. Investigation of the exceedances had been conducted which concluded
that the exceedances were not due to project works. The investigation reports
for the incidents are presented in Appendix
L.
5.7.5
The
Event and Action Plan for the occurrence of non-compliance of the water quality
criteria is annexed in Appendix F.
6.1.1
The
Contractor has registered as a chemical waste producer of the Project. The C&D
materials and waste sorting were carried out on-site. Receptacles were provided
for general refuse collection.
6.1.2
As
advised by the Contractor, 878m3 of inert C&D materials was
generated and disposed of at public fill to Tuen Mun Area 38, while 32,160kg of
general refuse was disposed of at North East New Territories (NENT) Landfill. No
paper/cardboard packaging, plastics and metals were collected by recycling
contractor in the reporting month. 473m3 of inert C&D materials
were reused on site. No chemical waste was collected by licensed contractor in
the reporting period. Details of the waste management data are presented in Appendix J.
6.1.3
The
Contractor was advised to properly maintain the on-site C&D materials and
waste collection, sorting and recording system, and maximize the reuse/recycle
of C&D materials and wastes. The Contractor was also reminded to properly
maintain the site tidiness and dispose of wastes accumulated site regularly and
properly.
6.1.4
The
Contractor was reminded that chemical waste containers should be properly
treated and stored temporarily in the designated chemical waste storage area on-site
in accordance with the Code of Practice on the Packaging, Labelling and Storage
of Chemical Wastes.
Table 7.1 Observations
and Recommendations of Site Audit
Parameters |
Date |
Observations and Recommendations |
Follow-up |
Water Quality |
5 Nov 2013 |
Reminder: The
Contractor was reminded to implement proper mitigation measures (e.g. sand
bags) to avoid earth, mud and debris leaving the works area via storm water
drainage (i.e. manholes). |
The
Contractor has blocked the manholes as observed during the ET weekly site
inspection on 13 November 2013. |
13 Nov 2013 |
Observation: A few
chemical drums were observed without drip tray. The Contractor should ensure
the provision of drip tray to avoid spillage. |
The Contractor
has provided drip tray for the chemical drums as observed during the ET
weekly site inspection on 18 November 2013. |
|
13 Nov 2013 |
Reminder: The
Contractor was reminded to enhance the efficiency of the washed water
collection channel for the wheel washing area. |
The
improvement of wheel washing facility was in progress, and the Contractor has
provided sufficient sand bag as observed during the ET weekly site inspection
on 18 November 2013. |
|
26 Nov 2013 |
Observation: A water pump
at the box culvert works area was connected directly to the river. The
Contractor should either remove the pump or connect it to water treatment
facility before discharge. |
The
Contractor has removed the water pump which directly connected to the river
as observed during the ET weekly site inspection on 04 December 2013. |
|
26 Nov 2013 |
Observation: An oil drum
was observed without secondary containment. The Contractor should ensure the
provision of drip trays for all chemical/oil containers. |
The
Contractor has provided drip tray for the chemical container as observed
during the ET weekly site inspection on 04 December 2013. |
|
26 Nov 2013 |
Reminder: The
Contractor was reminded to regularly inspect and maintain the performance of
the AquaSed. |
The
performance of the AquaSed was improved as observed during the ET weekly site
inspection on 04 December 2013. |
|
Air Quality |
N/A |
N/A |
N/A |
Noise |
N/A |
N/A |
N/A |
Waste / Chemical Management |
N/A |
N/A |
N/A |
Landscape & Visual |
13 Nov 2013 |
Reminder: The
Contractor was reminded to ensure the provision of tree protection zone for
all existing trees to be transplanted or retained. |
The tree
protection zone has been erected for the trees, as observed during the ET
weekly site inspection on 26 November 2013. |
Permits / Licenses |
N/A |
N/A |
N/A |
8.1.1
The Contractor has implemented the relevant environmental
mitigation measures as specified in the EIA Reports, EPs and updated EM&A
Manual. The implementation status of environmental mitigation measures during
the reporting period is summarized in Appendix
K. The status of the required submissions under the EP during the reporting
period is summarized in Table 8.1.
Table 8.1 Status
of Required Submission under Environmental Permit
EP Condition |
Submission |
Submission Date |
Condition 2.6 |
Landscape Plan |
4 Nov 2013 |
9.1.1
Two (2) Action Level exceedances of
24-hour TSP monitoring were recorded on 16 and 22 November 2013 while one (1)
Limit Level exceedance was recorded on 28 November 2013 at the monitoring
location (SR77) in the reporting month. The investigation reports of the
exceedances are under process. It will be reported during next reporting
period.
9.1.2
All
1-hour TSP results were below the
Action and Limit Levels in the reporting month.
9.1.3
No
noise complaint was received in the reporting month; hence, no Action Level
exceedance was recorded. No Limit
Level exceedance for noise was record in the reporting month.
9.1.4
Two (2) exceedances of water quality
limit (i.e. Action Level) of DO were recorded on 9 and 18 November 2013 in the
reporting month. The investigation of exceedances had been conducted which concluded
that the exceedances were not due to Project works. The investigation reports for the
incidents are attached in Appendix L.
9.2.1
No
environmental non-compliance was recorded in the reporting month.
9.3.1
A complaint regarding
water quality of Ma Wat River was received on 26 November 2013. The ET had conducted
investigations for the complaint which was considered as an invalid complaint
under this Project. The
cumulative statistics are provided in Appendix
M.
9.4.1
No
environmental related prosecution or notification of summons was received in
the reporting month. The cumulative statistics are provided in Appendix M.
10.1.1
The
major construction works in the coming reporting month are anticipated to
include:
-
Hoarding
and fencing erection, initial survey and base slab demolition;
-
Site
clearance and tree felling;
-
Excavation
works and base slab demolition;
-
Pre-drilling
works; and
-
Box
culvert extension works ¡V Flow diversion of existing stream, base and wall slab
construction.
10.2.1
Key
issues to be considered in the coming month are anticipated to include:
-
Site
runoff should be properly collected and treated prior to discharge;
-
Properly
maintain all drainage facilities and wheel washing facilities on site;
-
Chemical,
chemical waste and waste management;
-
Tree
protective measures for all retained trees should be well maintained; and
-
Expose
slopes and dusty stockpile should be covered up properly if no temporary work
will be conducted.
10.3.1
The
tentative schedule for environmental monitoring in the coming reporting month
is provided in Appendix C.
11.1.1
The
construction phase EM&A programme of the Project commenced on 5 November
2013.
11.1.2
The
1-hr TSP, 24-hr TSP, noise and water monitoring were carried out in the
reporting period.
11.1.3
Two (2) Action Level exceedances of
24-hour TSP monitoring were recorded on 16 and 22 November 2013 while one (1)
Limit Level exceedance was recorded on 28 November 2013 at the monitoring
location (SR77) in the reporting month. The investigation reports of the
exceedances are under process. It will be reported during next reporting
period.
11.1.4
No
Action and Limit Level exceedance for construction noise and 1-hour TSP
monitoring was recorded in the reporting period.
11.1.5
Two
(2) exceedances of water quality limit (i.e. Action Level) of DO were recorded
on 9 and 18 November 2013 in the reporting month. The investigation of
exceedances had been conducted which concluded that the exceedances were not
due to project works.
11.1.6
Environmental
site inspection was carried out for 4 times in November 2013. Recommendations
on remedial actions were given to the Contractors for the deficiencies
identified during the site audit.
11.1.7
A complaint regarding the
water quality of Ma Wat River was received on 26 November 2013. The ET had conducted
investigations for the compliant which was considered as an invalid complaint
under this Project.
11.2.1
According
to the environmental site inspections performed in the reporting month, the
following recommendations were provided:
Water Quality
-
Implement
proper mitigation measures (e.g. sand bags) to avoid earth, mud and debris
leaving the works area via storm water drainage;
-
Ensure
the provision of drip tray to avoid spillage;
-
Enhance
the efficiency of the washed water collection channel for the wheel washing
area;
-
Ensure
water treatment implemented before discharge; and
-
Ensure
drainage facilities erosion and sediment control structures are well maintained
and inspected regularly.
Landscape & Visual
-
Ensure
the provision of tree protection zone for all existing trees to be transplanted
or retained.