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AUES Job No.: TCS00715/14
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Tuen Mun - Chek Lap Kok Link
Contract No. HY/2013/12 –
Northern Connection Toll Plaza and Associated Works
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8th Quarterly Environmental
Monitoring & Audit Summary Report –
(August to October 2016)
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Prepared
For
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CRBC
and Kaden Joint Venture
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Quality Index
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Date
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Reference No.
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Prepared By
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Certified By
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2 December 2016
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TCS00715/14/600/R0257v3
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Ben
Tam
(Environmental Consultant)
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T.W. Tam
(Environmental Team Leader)
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This
report has been prepared by Action-United Environmental Services &
Consulting with all reasonable skill, care and diligence within the terms of
the Agreement with the client, incorporating our General Terms and Conditions
of Business and taking account of the resources devoted to it by agreement
with the client. We disclaim any responsibility to the client and others in
respect of any matters outside the scope of the above. This report is
confidential to the client and we accept no responsibility of whatsoever
nature to third parties to whom this report, or any part thereof, is made
known. Any such party relies upon the report at their own risk.
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1.1.1. CRBC-Kaden
Joint Venture (hereafter “CRBC-Kaden JV”) is commissioned by the
Highways Department (HyD) as the Main Contractor of
the Contract No. HY/2013/12 – Northern
Connection Toll Plaza and Tunnel Section ((hereafter “the Contract”) and this
Contract is part of the Tuen Mun
– Chek Lap Kok Link (TM-CLK
Link Project). The TM-CLK Link
Project is a designated project under Environmental Permit number EP-354/2009/D issued on 13 March 2015. The layout Plan of the Project and the Contract are showed in Appendix A and B respectively.
1.1.2.
The construction works
of the Contract mainly include:-
a.
construction of an approximately 5.4 hectares
toll plaza and an associated footbridge;
b.
construction of associated carriageways
including approximately 0.74 kilometre land viaducts,
and an approximately 230 metres vehicular underpass
to connect the toll plaza and the roundabout at Lung Mun
Road/Lung Fu Road;
c.
site formation for the construction of the
toll plaza, including associated slope works and natural terrain hazard
mitigation measures;
d.
modification and realignment of the existing
Lung Mun Road and Lung Fu Road; and
e.
associated
waterworks, drainage, sewerage and landscaping works, etc..
1.1.3.
Action-United Environmental Services & Consulting has been commissioned as an Independent ET to implement the
relevant EM&A program in accordance
with the approved EM&A Manual, as well as the associated duties.
1.1.4.
This is the 8th
Quarterly EM&A Summary Report covering the period
from 1 August
to 31 October 2016.
1.2.1
The Monthly Environmental Monitoring and
Audit (EM&A) Report is structured into the following sections:-
Section 1 Introduction
Section 2 Contract
Organization and Construction Progress
Section 3 Summary
of Impact Monitoring Requirements
Section 4 Air
Quality Monitoring
Section 5 Ecology
Monitoring
Section 6 Cultural
Heritage
Section 7 Landscape
and Visual
Section 8 Landfill
gas hazard Monitoring
Section 9 Waste
Management
Section 10 Site Inspections
Section 11 Environmental
Complaints and Non-Compliance
Section 12 Implementation
Status of Mitigation Measures
Section 13 Conclusions
and Recommendations
2.1.1
The Contract organization and contact details
of key personnel are shown in Appendix C.
2.2.1
In the Reporting Period, the major
construction activity conducted under the Contract is summarized in below. Moreover, the master construction
program and 2-month rolling programme is enclosed in Appendix D.
August 2016
Ÿ Instrumentation
and Monitoring
Ÿ Site Formation –
Earthwork on Slope D and E; surface drainage on slope C, D & E and Portion
H;
Ÿ Toll Plaza
Decking TD1 (Portal Beam Construction) and TD2 Section 1;
Ÿ Toll Plaza
Footbridge;
Ÿ Retaining
Structure RW_A, RW_B and Slope TP_F;
Ÿ Toll Collector
Subway & Associated Works Section 1;
Ÿ Bridge G1, G2
and Bridge H1 Section 2;
Ÿ Sewer Culvert at
FC1 and FC2 and Existing Box Culvert;
Ÿ Waterproofing
and lining at Vehicular Underpass;
Ÿ Road and
Drainage Works at +11mPD, +19mPD and Portion H.
Ÿ Precast panel
installation at Retaining Structure RW_B south wall
Ÿ Precast Beam
installation at Lung Mun Road
September 2016
Ÿ Instrumentation
and Monitoring
Ÿ Site Formation
–Retaining Structure RW_A, Slope TP_E, Slope Upgrading Works, Earthwork on
Slope D and E; surface drainage on slope C, D & E and Portion H;
Ÿ Toll Plaza
Decking TD1 (Portal Beam Construction) and TD2 Section 1;
Ÿ Toll Plaza
Footbridge;
Ÿ Site Formation -
Retaining Structure RW_A and Slope TP_F;
Ÿ Toll Collector
Subway & Associated Works Section 1;
Ÿ Bridge G1, G2
and Bridge H1 Section 2;
Ÿ Sewer Culvert at
FC1 and FC2 and Existing Box Culvert;
Ÿ Road and
Drainage Works at Lung Mun Road;
Ÿ Precast panel
installation at Retaining Structure RW_B south wall;
Ÿ Precast Beam
installation at Lung Mun Road
October 2016
Ÿ Instrumentation
and Monitoring
Ÿ Earthwork on
slope D and E;
Ÿ Construction of
slope surface drainage on slope C, D & and E and Portal H;
Ÿ Road drainage
works at +11mPD and +19mPD platform and Portion H;
Ÿ Construction of
Retaining Wall A and B;
Ÿ Construction of
Bored pile at central median
Ÿ Box-culvert
construction near MH2.
Ÿ Sewer culvert by
hand shield method at FC1, FC2, MH6, MH3, MH7;
Ÿ Toll plaza
decking TD2
Ÿ Waterproofing
and lining at vehicular Underpass;
Ÿ Construction of
footbridge, Bridge G2 and TD1 decking;
Ÿ Construction of
Toll Collector Subway.
Ÿ Fabrication of
form traveler at fire station (need to arrange specific safety training)
Ÿ Assembly of Form
Traveller at Bridge H1E and load test.
Ÿ Stitching of TD1
decking
2.3 Summary of Environmental Submissions
2.3.1
In according to the EP, the required documents
have submitted to EPD for retention which listed in below:
Ÿ
Monitoring Plan on Construction Dust
(submission refer to Contract HY/2012/08)
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Landscape and Visual Plan (not yet endorsed by EPD)
Ÿ
Waste Management Plan (endorsed by EPD on 16 March 2015)
Ÿ
Baseline Monitoring Report (not yet endorsed
by EPD)
2.3.2
Summary of
the relevant permits, licenses, and/or notifications on environmental
protection for Contract No. HY/2013/12 are presented
in Table 2-1.
Table 2-1 Status of
Environmental Licenses and Permits of the Contracts
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No.
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Type of Permit/
License
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Submission Date
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Reference/
License No.
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Date of Issue
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Date of Expiry
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1
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Air pollution Control (Construction Dust)
Regulation
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06-08-2014
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377719
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06-08-2014
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N/A
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2
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Chemical Waste Producer Registration -
Waste Producers Number
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06-08-2014
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5117422C389301
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03-09-2014
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N/A
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3
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Variation of Effluent Discharge License
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22-08-15
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WT00023973-2016
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14-03-16
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30-09-2019
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4
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Waste Disposal Regulation - Billing Account
for Disposal of Construction Waste
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21-07-2014
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7020460
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01-08-2014
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N/A
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5
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CNP for Multiple Task
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21-04-2016
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GW-RW0520-16
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05-05-2016
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04-11-2016
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6
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CNP for MH5
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25-04-2016
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GW-RW0563-16
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18-05-2016
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17-11-2016
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7
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CNP for Tunnel works
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25-04-2016
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GW-RW0582-16
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23-05-2016
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22-11-2016
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8
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CNP for Flasework Erection
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18-05-2016
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GW-RW0289-16
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22-06-2016
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19-08-2016
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9
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Extend CNP for Falsework Erection
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27-07-2016
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GW-RW0472-16
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22-08-2016
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21-12-2016
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3.1.1
The major construction activities under the
Contract are land-based and no marine work will be involved. In accordance with the Project EM&A
Manual requirements, the environmental aspects under the Contract shall be included
air quality, ecological, cultural heritage, landscape and visual, landfill gas and
site inspection during construction period. In addition, audit of the contractor’s
implementation of the construction noise and land-based water quality pollution
control measures are also required for the Contract.
3.1.2
A summary of construction phase EM&A
requirements are presented in the
sub-sections below.
3.2.1
The construction phase air quality monitoring
shall cover the following parameters:
•
1-hour TSP; and
•
24-hour TSP
3.3.1
The air quality
monitoring stations for impact monitoring are listed in Table 3-1
and illustrated in Appendix E.
Table
3-1 Air
Quality Monitoring Stations under the Contract
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ID
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Location
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Air monitoring station
Description
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ASR1
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Tuen Mun Fireboat Station
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EM&A Manual
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ASR5
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Pillar Point Fire Station
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EM&A Manual
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AQMS1
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Previous River Trade Golf
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Enhanced TSP Level under EP condition 2.4
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ASR6
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Butterfly Beach Laundry
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Enhanced TSP Level under EP condition 2.4
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ASR10
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Butterfly Beach Park
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Enhanced TSP Level under EP condition 2.4
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3.4.1
As per Condition 2.4 of the EP of TM-CLKL, an
enhanced monitoring plan on TSP level at Tuen Mun (“the Enhanced TSP Monitoring Plan”) is required to be
submitted to the DEP for approval at least 1 month before the commencement of
construction of the Project. Details
of the Enhanced TSP Monitoring Plan under Contract No. HY/2012/08 could be
found from the project website. The air quality monitoring work under this
Contract will follow the monitoring requirement of enhanced TSP monitoring
under the project.
3.4.2
The air quality monitoring requirements for
the Contract is summarized in Table 3-2.
Table
3-2 Enhanced
TSP Monitoring Plan – Construction Phase
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Condition
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Monitoring Parameter
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Monitoring Location
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Frequency
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Monitoring Requirement
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General
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1-hour TSP
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ASR1, ASR5, AQMS1, ASR6, ASR10
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3 times per day every
six days
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Throughout the
Northern Connection, toll plaza and tunnel buildings construction works
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24-hour TSP
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ASR1, ASR5, AQMS1, ASR6, ASR10
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Daily every six days
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Special
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1-hour TSP
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ASR1, ASR5, AQMS1, ASR6, ASR10
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3 times per day every
three days
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Northern Connection
During excavation
works for launching shaft, excavation work for Cut and Cover Tunnel and Cut
and Cover Tunnel Construction
Toll Plaza
During excavation,
slope works, construction of road and superstructures and wind erosion from
open sites and stockpiling areas
Tunnel Buildings
During excavation,
foundation works, construction of superstructures and wind erosion from open
sites and stockpiling areas
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24-hour TSP
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ASR1, ASR5, AQMS1, ASR6, ASR10
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Daily every three days
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3.5.1
The 24-hour and 1-hour TSP levels shall be
measured by following the standard high volume sampling method as set out in
the Title 40 of the Code of Federal
Regulations, Chapter 1 (Part 50), Appendix B.
3.5.2
The filter paper of 24-hour TSP measurement
shall be determined by HOKLAS accredited laboratory. A high volume sampler in
compliance with the following specifications shall be used for carrying out the
1-hr and 24-hr TSP monitoring:
(i)
0.6-1.7 m3/min (20-60
SCFM) adjustable flow range;
(ii)
equipped with a
timing/control device with +/- 5 minutes accuracy for 24 hours operation;
(iii)
installed with
elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;
(iv)
capable of providing a
minimum exposed area of 406 cm2 (63 in2);
(v)
flow control accuracy:
+/- 2.5% deviation over 24-hr sampling period;
(vi)
equipped with a shelter
to protect the filter and sampler;
(vii) incorporated with an electronic mass flow rate controller or other
equivalent devices;
(viii) equipped with a flow recorder for continuous monitoring;
(ix)
provided with a peaked roof
inlet;
(x)
equipped with a
manometer;
(xi)
able to hold and seal
the filter paper to the sampler housing in a horizontal position;
(xii) easy to change the filter; and
(xiii) capable of operating
continuously for 24-hr period.
3.5.3
Calibration of dust monitoring equipment
shall be conducted by the ET upon installation and in bi-monthly intervals
during construction phase. The
transfer standard shall be traceable to the internationally recognized primary
standard and be calibrated annually. The calibration data shall be properly
documented for future reference by concerned parties, such as the IEC. All the
data shall be converted into standard temperature and pressure condition.
3.5.4
The filter paper of 24-hour TSP measurement
shall be determined by HOKLAS accredited laboratory.
3.5.5
If the ET proposes to use a direct reading
dust meter to measure 1-hr TSP levels on an ad hoc basis, he shall submit
sufficient information to the IEC to prove that the instrument is capable of achieving
a comparable result as that the High Volume Sampler
(HVS) and may be used for the 1-hr sampling. The instrument should also be calibrated
regularly and the 1-hr sampling shall be checked periodically by the HVS to
check the validity and accuracy of the results measured by the direct reading
method.
3.5.6
According to the Project EM&A Manual,
wind data monitoring equipment shall also be provided and set up for logging
wind speed and wind direction near the dust monitoring locations. The equipment installation location
shall be proposed by the ET and agreed with the IEC. For installation and operation of wind
data monitoring equipment, the following points shall be observed:
(i)
the wind sensors should
be installed on masts at an elevated level 10 m above ground so that they are
clear of obstructions or turbulence caused by the buildings;
(ii)
the wind data should be
captured by a data logger to be down-loaded for processing at least once a
month;
(iii)
the wind data monitoring
equipment should be re-calibrated at least once every six months; and
(iv)
wind direction should be
divided into 16 sectors of 22.5 degrees each.
3.6.1
The baseline monitoring results formed the
basis for determining the air quality criteria for the impact monitoring. The
ET shall compare the impact monitoring results with air quality criteria set up
for 24-hour TSP and 1-hour TSP.
Based on results of the approved Baseline Monitoring Report of HyD Contract HY/2012/08, the Action and Limit Levels for
impact dust monitoring are shown in Tables 3-3.
Table 3-3 Action and Limit Levels for Impact Air
Quality Monitoring
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Air Quality Monitoring Stations
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24-hour TSP (μg/m3)
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1-hour TSP (μg/m3)
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Action Level
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Limit Level
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Action Level
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Limit Level
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ASR1
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213
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260
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331
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500
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ASR5
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238
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260
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340
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500
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AQMS1
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213
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260
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335
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500
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ASR6
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238
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260
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338
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500
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ASR10
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214
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260
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337
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500
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3.6.2
Should non-compliance of the environmental
quality criteria occurs, remedial actions will be triggered according to the
Event and Action Plan which presented in Appendix F.
Noise
3.7.1
The TM-CLKL EIA study stated that no existing
noise sensitive receiver (NSR) was identified within the Study Area at Tuen Mun. Therefore, no noise monitoring is
required for the construction phase of the Contract.
3.7.2
Regular site inspections and audits will be
carried out during the construction phase in order to confirm the construction
works under the Contract comply with the regulatory noise requirements.
Water Quality
3.7.3
No marine works will be undertaken under the Contract. Therefore, no water quality monitoring
is required for the construction phase of the Contract.
Ecology
3.7.4
No marine works will be undertaken under the Contract
and generated marine ecological impact, no dolphin monitoring is required for
the construction phase of the Contract.
3.7.5
During construction phase, the ET will
perform Pitcher Plants inspection at least once every week to report the growth
condition (only undertaken at Establish
period) and protection measures.
Landscape and Visual
3.7.6
Measures to mitigate landscape and visual
impact during construction should be checked and monitored by a Registered
Landscape Architect to ensure compliance with the intended aims of the
mitigation measures in accordance with the EM&A Manual.
Cultural Heritage
3.7.7
Grave G1 as a heritage resource is situated
near the proposed toll plaza in Tuen Mun. Site
inspections should be undertaken at least once per week throughout the
construction period to ensure compliance with the intended aims of recommended
mitigation measures.
Landfill Gas
3.7.8
During EIA study, landfill gas hazards are likely
to be generated from the Pillar Point Valley (PPV) Landfill. Landfill gas monitoring is recommended
during construction of the Contract to ensure the works area is free of
landfill gas before the worker entered the concerned area.
4.1.1
The air quality impact monitoring and enhanced
Total Suspended Particulates (TSP) level monitoring at five proposed locations
are currently carried out by the ET of Contract HY/2012/08. Sharing of impact air quality monitoring
data between HY/2012/08 and HY/2013/12 is agreed by all relevant parties. The Contract is not required to conduct
its own dust monitoring exercise until the Contract HY/2012/08 ends.
4.2.1
In the Reporting Period, 1- hour and
24-hour TSP monitoring at the five proposed locations are continued to perform by
the ET of Contract HY/2012/08. Therefore,
no air quality monitoring was conducted by the ET of Contract HY/2013/12. Details information of air quality
monitoring results could be referred to the Monthly EM&A Reports of the
Contract HY /2012 /08 (August 2016, September 2016 and October 2016).
4.3.1
According to the air quality monitoring
result provided by Contract HY/2012/08, no exceedances in 1-hour and 24-hour
TSP were recorded in the Reporting Period.
No Notification on Exceedances (NOEs) was issued by the ET of Contract
HY/2012/08. The summary of air
quality exceedance in the Reporting Period is shown in Table 4-1.
Table 4-1 Summary of Air Quality Monitoring Exceedance
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Date of Exceedance
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Monitoring Station
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Air Quality Parameter
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Result
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Exceed
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NA
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NA
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NA
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--
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--
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4.4.1
No investigation for
exceedance is required for the Reporting Period.
5.1.1
According to the EM&A Manual
requirements, regularly
inspection for Pitcher Plants at least once every week to report it growth and protection
measure
situation shall be conducted during construction period.
5.2.1
Total 181 pitcher plants were transplanted to
finial receptor site and the rest of the Pitcher Plant individuals (certified
dead by the specialist) were not transplanted and were treated as general
refuse. All the transplantation of pitcher plant from the nursery site to final
receptor site was completed on 10th September 2015.
5.2.2
In the Reporting Period, inspections for
implementation status of mitigation measures for the Pitcher Plants were
carried out by the ET on 3rd,
9th, 16th, 23rd, 30th August 2016, 6th,
13th, 21st, 27th September 2016, 4th,
12th, 18th and 25th October 2016.
5.2.3
During
each inspection, the transplanted pitcher plant was performed random checking
at the final receptor area. It was
observed that the transplanted pitcher plants were properly protected and the
growth was normally in fair condition except three individuals which appeared
poor condition in May 2016 were certified dead by the specialist. It is considered that the Pitcher Plant
were establishing after transplanting shock and adapting to the condition of
the Final Receptor Site and frequent watering is recommended. Besides, no
construction activities were observed to be carried out at the surrounding of
the final receptor area. The
condition of chain link fence is good and no repair or maintenance is required.
5.2.4
Establish period for the pitcher plants was completed at
the end of September 2016, therefore the join site completion of establish
period visit with AFCD was undertaken on 23 September 2016 and the advance copy
of finial pitcher report was submitted to AFCD on 11 November 2016. Therefore
after 23 September 2016, only the integrity of the protection fence was checked
to fulfil the EIA requirement.
5.2.5
No matters the completion of establish period, the
Contractor should properly maintain the fencing along the receptor area to
avoid disturbance to the pitcher plants under the EIA requirement.
6.1.1
According to the EM&A Manual
requirements, regular inspection for heritage resource, Grave G1, shall be
audited by the ET at least once every week to ensure recommended mitigation measures
implemented during construction period. The aim of the survey is to prevent any
possible damage to the grave and to ensure the proposed mitigation measures are
implemented. The broad scope of the
audit will involve supervision of the following:
Ÿ
Non-contact effects of
the engineering works, such as vibration from pneumatic drills which could cause
damage, such as foundation or wall cracks and loosening of tiles or fixtures;
and
Ÿ
Contact between the
historic structures and equipment and materials associated with the engineering
works.
6.1.2
Specifically, the monitoring programme will entail the following tasks:
Ÿ
The extent of the agreed
works areas should be regularly checked during the construction phase to ensure
the buffer is being maintained; and
Ÿ
Ensure no stockpiling or
equipment storage is affecting the structure.
6.1.3
In the event of non-compliance the
responsibilities of the relevant parties is detailed in the Event/ Action Plan
in Appendix F.
6.2.1
In the Reporting Period, site inspection for
the Grave G1 was undertaken on 3rd,
9th, 16th, 23rd, 30th August 2016,
6th, 13th, 21st, 27th September
2016, 4th, 12th, 18th and 25th
October 2016. During
these inspections, buffer zone was maintained between the working area and the
Grave. The nearby areas were clean,
and no construction materials or mechanical equipment were stored within or
close to the buffer zone.
6.2.2
Accordingly, the Contractor has had fully
implemented cultural heritage mitigation measures in accordance with the
EM&A Manual requirements.
7
Landscpae and Visual
7.1.1
According to EM&A Manual requirements,
monitoring of Contractor’s operations during construction period to report on
Contractor’s compliance should be carried out on weekly basis. Measure to mitigate landscape and visual
impact during construction should be checked and monitored by a Registered
Landscape Architect to ensure compliance with the intended aims of the
mitigation measures. Moreover, the
progress of the engineering works shall be regularly reviewed on site to
identify the earliest practical opportunities for the landscape works to be
undertaken.
7.2.1
In the Reporting Period, site inspection for
landscape and visual mitigation measures was undertaken by the Registered
Landscape Architect on 5th, 12th, 19th,
26th August 2016, 2nd,
9th, 15th, 23rd, 30th September
2016, 7th, 14th,
22nd and 28th October 2016.
7.2.2
Most of the landscape works such as planting
was not yet commenced. The detailed
inspection checklists can be referred to the Monthly EM&A Reports
(August 2016, September 2016 and October 2016) of the contract.
8.1 General
8.1.1
During EIA study, landfill gas hazards are likely
to be generated from the Pillar Point Valley (PPV) Landfill. Hence, regular
landfill gas monitoring is recommended during construction of the proposed toll
plaza.
8.1.2
During construction, a Safety Officer should
be appointed to carry out the monitoring works. The monitoring frequency and
areas to be monitored should be set down prior to commencement of ground-works
either by the Safety Officer or an approved and appropriated qualified person.
The routine monitoring should be carried out in all excavations, manholes,
chambers, relocation of monitoring wells and any other confined spaces that may
have been created. All measurements in excavations should be made with the
extended monitoring tube located not more than 10 mm from the exposed ground
surface. Monitoring should be performed properly to make sure that the area is
free of landfill gas before any man enters in the area.
8.1.3
For excavations deeper than 1m, measurements
should be carried out:
Ÿ
at the ground surface
before excavation commences;
Ÿ
immediately before any
worker enters the excavation;
Ÿ
at the beginning of each
working day for the entire period the excavation remains open; and
Ÿ
periodically through the working day whilst workers are in the excavation.
8.1.4
For excavations between 300mm and 1m deep,
measurements should be carried out:
Ÿ
directly after the
excavation has been completed; and
Ÿ
periodically whilst the
excavation remains open
8.1.5
For excavations less than 300mm deep,
monitoring may be omitted, at the discretion of the Safety Officer or other
appropriately qualified person.
8.1.6
To ensure the accuracy of the monitoring
data, zeroing of the gas analyser shall be undertaken
at the start of each day’s monitoring.
As part of the QA/QC, calibration of the gas analyser
shall be conducted at least once every two weeks according to the specification
of the manufacturer’s operation manual.
8.1.7
The landfill consultation zone was divided
into 6 monitoring zones. The landfill gas monitoring zones are summarized in Table
8-1 and the layout plan for the monitoring zone is illustrated in Appendix E.
Table 8-1 Landfill
Gas Monitoring Zone
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ID
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Location
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TD1
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TD1, Retaining Wall A and Subway
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RW-B
|
Retaining Wall B
|
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RW-F
|
Retaining Wall F
|
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S&U
|
Slope and Underpass
|
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BW
|
Bridge Works
|
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LMR
|
Lung Mun Road
|
8.2.1
In the Reporting Period, landfill gas
monitoring was conducted at monitoring zone RW-B & RW-F for August and
September 2016. For October 2016 landfill gas monitoring was conducted at the zone TD1 and LMR due to the excavated area
have been backfilled at the end of September 2016 for zone RW-B & RW-F. A
BIOGAS 5000 gas analyser was used for the landfill
gas monitoring.
8.2.2
There were total 75 workings days (52
days for RW-B & RW-F and 23 days
for TD1 & LMR) monitoring were carried by the Safety Officer or an approved
and qualified persons in this reporting period. Table
8-2 & 8-3 are summarized landfill gas measurement results. Moreover, graphical plot are attached in
Appendix G.
Table 8-2 Summary
of Landfill Gas Measurement Results for August to September 2016
|
Landfill Gas Parameter
|
Action
Level
|
Limit
Level
|
Detectable at Retaining Wall B
|
Detectable at Retaining Wall F
|
|
Min
|
Max
|
Min
|
Max
|
|
Methane
|
>10% LEL (>0.5%
v/v)
|
>20% LEL (>1% v/v)
|
0.0%
|
0.2%
|
0.0%
|
0.2%
|
|
Oxygen
|
<19%
|
<18%
|
21.0%
|
21.1%
|
21.0%
|
21.1%
|
|
Carbon Dioxide
|
>0.5%
|
>1.5%
|
0.1%
|
0.2%
|
0.1%
|
0.2%
|
Table 8-3 Summary
of Landfill Gas Measurement Results for October 2016
|
Landfill Gas Parameter
|
Action
Level
|
Limit
Level
|
Detectable at TD1
|
Detectable at LMR
|
|
Min
|
Max
|
Min
|
Max
|
|
Methane
|
>10% LEL (>0.5%
v/v)
|
>20% LEL (>1% v/v)
|
0.1%
|
0.1%
|
0.1%
|
0.1%
|
|
Oxygen
|
<19%
|
<18%
|
21.0%
|
21.1%
|
21.0%
|
21.1%
|
|
Carbon Dioxide
|
>0.5%
|
>1.5%
|
0.1%
|
0.2%
|
0.1%
|
0.2%
|
8.2.3
The measurement results shown that slightly
methane concentration was detected and all oxygen concentration was over 21.0%
and Carbon Dioxide was between 0.1 and 0.2 %. No corrective action was required
accordingly.
9.1 General
Waste Management
9.1.1
Waste management was carried out by an
on-site Environmental Officer or an Environmental Supervisor from time to time.
9.2.1
All types of waste arising from the
construction work are classified into the following:
l Construction
& Demolition (C&D) Material;
l Chemical
Waste;
l General
Refuse; and
l Excavated
Soil.
9.2.2
Whenever possible, materials were reused
on-site as far as practicable. The quantities
of waste for disposal in the Reporting Period are summarized in Tables
9-1 and 9-2 and the Waste Flow Table is presented in Appendix H.
Table 9-1 Summary
of Quantities of Inert C&D Materials
|
Type of Waste
|
Quantity
|
Disposal
Location
|
|
Aug 16
|
Sep 16
|
Oct 16
|
|
Reused in this
Project (Inert) (in '000 m3)
|
5.694
|
3.923
|
5.736
|
-
|
|
Reused in other
Projects (Inert) (in '000 m3)
|
2.607
|
8.561
|
15.510
|
• Lam Tei Quarry
• Eco Park
K.wah Recycle Facilities
• Lung Kwu Tan Tailor Recycled Aggregates
• Laintang BCP
• TM-CLKL
C2
|
|
Disposal as Public
Fill (Inert) (in '000 m3)
|
0.225
|
0.164
|
0.098
|
Tuen Mum Area 38
|
Table 9-2 Summary
of Quantities of C&D Wastes
|
Type of Waste
|
Quantity
|
Disposal Location
|
|
Aug 16
|
Sep 16
|
Oct 16
|
|
|
0
|
0
|
0
|
-
|
|
Recycled
Paper / Cardboard Packaging (in '000kg)
|
0
|
0
|
0
|
-
|
|
Recycled
Plastic (in '000kg)
|
0
|
0
|
0
|
-
|
|
Chemical
Wastes (in '000kg)
|
0
|
0
|
0
|
-
|
|
General
Refuses (in '000m3)
|
0.157
|
0.119
|
0.125
|
WENT
|
9.2.3
To control the site performance on waste management, the
Contractor shall ensure that all solid and liquid waste management works are
fully in compliance with the relevant license/permit requirements, such as the
effluent discharge license and the chemical waste producer registration. The Contractor is also reminded to
implement the recommended environmental mitigation measures according to the Environmental Monitoring and Audit
Manual.
10.1 requirements
10.1.1
According to the approved EM&A Manual,
the environmental site inspection shall be formulation by ET Leader. Weekly environmental site inspections should
carry out to confirm the environmental performance.
10.1.2
During
the Reporting Period, 13
events of the joint site inspections were undertaken to evaluate the site
environmental performance. The
summaries of the findings during site inspection are presented in Tables
10-1 and 10-2.
Table
10-1 Site Observations for the Contract for
the Reporting Period
|
Date
|
Findings /
Deficiencies
|
Follow-Up Status
|
|
3 August 2016
|
Ÿ Stagnant water cumulated inside
the idle sedimentation tank was observed after the rainstorm. Stagnant water
should be cleared to prevent mosquito breeding. (Central Divider)
|
Ÿ
Stagnant water cumulated inside the idle sedimentation
was drained away.
|
|
Ÿ Free standing chemical container without drip tray was observed. Drip
tray should be provided for all chemical storage on site. (Central Divider)
|
Ÿ Free standing chemical
container without drip tray was removed.
|
|
9 August 2016
|
Ÿ C&D and general waste
cumulated on site was observed. The contractor was reminded to clean more
frequency. (Butterfly Beach)
|
Ÿ C&D and general waste cumulated on site was removed.
|
|
Ÿ Stockpile without cover was
observed. Dust mitigation measures should be provided to reduce dust impact.
(MH2)
|
Ÿ Tarpaulin sheet was covered on the stockpile to prevent dust impact.
|
|
16 August 2016
|
Ÿ Stagnant water cumulated inside the lifting eyes of the concrete block
was observed. The lifting eyes should filled with sand to prevent mosquito
breeding. (Near retaining wall B)
|
Ÿ Lifting eyes of the concrete block was filled with sand to prevent
stagnant water accmulation.
|
|
Ÿ C&D waste cumulated on site was observed. The contractor should
clear the waste more frequency. (Near retaining wall B)
|
Ÿ C&D waste cumulated on site was removed.
|
|
Ÿ All site discharge should be properly treated and comply with discharge
license requirement before discharge from site.
|
Ÿ Not required for reminder.
|
|
23 August 2016
|
Ÿ As a reminder, proper maintenance should be provided for the water
barriers to prevent mosquito breeding.
|
Ÿ Not required for reminder.
|
|
Ÿ Temporly drainage system should be maintain properly to prevent clear
run-off contaminate with the exposed surface. (Stream near West portal)
|
Ÿ Not required for reminder.
|
|
30 August 2016
|
Ÿ Oil drum without drip tray was observed. Drip tray should be provided
for all chemical storage on site. (Retaining wall B)
|
Ÿ Free standing coil drum
without drip tray was removed.
|
|
Ÿ Dust mitigation measures should be provided for the idle stockpile and
excavation activities to reduce dust generation.
|
Ÿ Not required for reminder.
|
|
6 September 2016
|
Ÿ C&D waste and general refuse scattered on site was observed.
Housekeeping should be improved to maintain the site clean and tidy. (Portion
H)
|
Ÿ C&D waste and general refuse scattered on site was cleared.
|
|
Ÿ Free standing chemical containers without drip tray storage on site was
observed. Drip tray should be provided for all chemical containers storage on
site. (Portion H)
|
Ÿ Free standing chemical containers without drip tray was removed.
|
|
Ÿ Stagnant water cumulated on site after the rainstorm was observed.
Stagnant water cumulated on site should be cleared to prevent mosquito
breeding.
|
Ÿ Not required for reminder.
|
|
13 September 2016
|
Ÿ Tree protection zone broken was observed. Proper maintenance for the
protection zone should be provided. (Behind the site office)
|
Ÿ The broken tree protection zone was repaired..
|
|
Ÿ Stagnant water cumulated inside the lifting eyes of the concrete block
was observed. Lifting eyes of concrete block should filled with sand to
prevent stagnant water accmulation. (Near the entrance of the site office)
|
Ÿ Lifting eyes of the concrete block was filled with sand to prevent
stagnant water accmulation.
|
|
21 September 2016
|
Ÿ Broken sand bages was observed. Sand bages should be replaced to divert
the surface run-off properly. (Roundabout at Mong Fat Street)
|
Ÿ Broken sand bages was replaced..
|
|
Ÿ Public access should be provided to the grave under EM&A manual
requirement. (G1)
|
Ÿ Not required for reminder.
|
|
27 September 2016
|
Ÿ Three sides plus top shelter should be provided for the grouting works.
(West Portal)
|
Ÿ Shelter was provided for the grouting works area.
|
|
4 October 2016
|
Ÿ General refuse and C&D waste scattered on site was observed.
Housekeeping should be improved to maintain the site clean and tidy. (FC2)
|
Ÿ General refuse and C&D waste scattered on site was cleared.
|
|
Ÿ Oil drums and chemical containers without drip tray storage on site was
observed. Drip tray should be provided for all chemical containers storage on
site. (Storage area near retaining wall B)
|
Ÿ Drip tray was provided for the oil drum.
|
|
Ÿ Improper colour NRMM label was observed. Proper label should be
displayed for all NRMM using on site. (Retaining wall B)
|
Ÿ Proper label was displayed on the NRMM.
|
|
12 October 2016
|
Ÿ Explosed slope near the stream should be covered with tarpaulin sheet to
prevent surface run-off contamination during rainstorm. (Stream B)
|
Ÿ Explosed slope near the stream was covered with tarpaulin.
|
|
Ÿ Chemical containers without drip tray storage on site was observed.
(Grouting area near west portal)
|
Ÿ Chemical containers without drip tray was removed
|
|
Ÿ Heavy dust emitted from soil nail works was observed. Effective dust
control measures should be provided to minimize dust generation. (Slope D)
|
Ÿ No dust emitted from soil nail works was observed.
|
|
Ÿ All engine cover should be closed properly when the plant is operation.
|
Ÿ Not required for reminder.
|
|
18 October 2016
|
Ÿ Sand bags or earth bund should be provided to divert the muddy run-off
to de-silting system. (TPA 1-10)
|
Ÿ Sand bags were provided to divert the surface run-off.
|
|
Ÿ Exposed slope should covered with tarpaulin sheets to avoid contaminate
to the surface run-off. Also, broken tarpaulin should be replaced. (H1E)
|
Ÿ Broken tarpaulin was replaced.
|
|
Ÿ As a reminder, stagnant water cumulated on site during rainstorm should
be treated and drained away ASAP.
|
Ÿ Not required for reminder.
|
|
25 October 2016
|
Ÿ Three sides plus top shelter should be provided for grouting works.
(Slope D)
|
Ÿ Shelter was provided for the grouting works area.
|
|
Ÿ Soil and silt cumulated inside the temporary channel was observed after
rainstorm. The contractor should clean up the silt to prevent contaminate
treated discharge water. (Slope D)
|
Ÿ Soil and silt cumulated inside the temporary channel was cleared.
|
|
Ÿ EP should be displayed at all site entrance. (works area near fire
station)
|
Ÿ Not required for reminder.
|
Table 10-2 Summary of Reminders/Observations
of Site Inspection
|
Reporting Period
|
Date of site inspection
|
Nos. of findings / reminders
|
Follow-Up Status
|
|
August 2016
|
3rd, 9th, 16th,
23rd and 30th August 2016
|
11
|
Completed
|
|
September 2016
|
6th, 13th,
21st and 27th September 2016
|
8
|
Completed
|
|
October 2016
|
4th, 12th,
18th and 25th October 2016
|
13
|
Completed
|
10.1.3
In the
Reporting Period, no non-compliance was recorded,
however, 32 observations/ reminders were
recorded during the site inspections.
Minor deficiencies found
in the weekly site inspection were in general rectified within the specified
deadlines. The environmental
performance of the Project was therefore considered satisfactory.
Inspection Checklist for Vulnerable to Contaminated Water Discharge
10.1.4
Following to the complaint about
discharge of milky water to Bufferfly Beach on 2 September 2015. The Contractor proposed to carry out
daily inspection of wastewater treatment facilities, concerned discharge
points, drainage inlets and outlets during typhoon or wet season.
10.1.5
In addition, specific inspections
would also be conducted before and after adverse weather to ensure necessary
remedial works would be carried out timely. Should incidental contaminated
water discharge be found at the inlet of the associated drainage system, a
specific inspection of the relevant drainage pipes would be conducted for
traces of deposit, and follow up actions would be taken when necessary.
10.1.6
The daily inpsection for vulnerable
to contaminated water discharge was temporarily suspended during the dry season
and resumed on 5 April 2016. As requested by the EPD, the associated inspection
checklists of the reporting peroid were presented in the Monthly EM&A
Report – August 2016, September 2016 & October 2016.
11.1
Environmental Complaint, Summons and Prosecution
11.1.1 In the
Reporting Period, no summons and prosecution under the EM&A Programme was lodged.
Moreover, no exceedance of the environmental performance (Action / Limit
Levels) was recorded for monitoring programme. However, one (1) environmental complaint
was received and lodged for the Contract.
Follow up actions have been undertaking by the Contractor to resolve the
deficiencies. The details of complaint are listed below:-
l
A complaint was
received via EPD hotline on 3
October 2016, claimed that muddy water entering the drainage system near site entrance-Hand-key
attendance system Pillar Point, Tuen Mun at around
03:00 to 04:00 after the rainstorm. Refer to tele-conversation with EPD and Contractor,
the complaint was actually mentioning the muddy water entering the drainage system was occurred on 1 October 2016 03:00
to 04:00 at the bus station nearby the site entrance. According to the site
record, the works carried out during the concerned time period was maintenance
works of TTA include maintenances of flashlight, water barrier and road
marking, there is no ponding water was observed nearby the concerned locations.
Also during the weekly site inspection on 4 October 2016, no water discharged
from site and ponding at the bus station nearby the site entrance was observed.
Earth bund was also provided at the slope near the site entrance to divert the
surface run-off to the de-silting system. Moreover, the record from the Hong
Kong Observatory also stated there was no rainfall recorded at Tuen Mun between 30 September
2016 and 1 October 2016 04:45 a.m. Therefore for the above result, it is
considered that the above complaint is not related to the project.
11.1.2 During the
complaint investigation work, the Contractor was co-operated with the ET in providing
all the necessary information and assistance for completion of the
investigation. Investigation report
(IR) for the complaint has been conducted by the ET and agreed by the IEC. It was concluded that the complaint was
not related to the works under the Contract.
11.1.3 The
statistical summary table of environmental exceedance, complaint, summons and
prosecution is presented in Tables 11-1, 11-2, 11-3 and 11-4.
Table 11-1 Statistical
Summary of Environmental Exceedance
|
Reporting Period
|
Environmental Aspect / Parameter
|
Environmental Performance
|
Event
Exceedance
|
|
Reporting
Period
|
Previous
Periods
|
Cumulative
|
|
1 February
2016 –
31 October 2016
|
Air Quality - 1-hr TSP
|
Action Level
|
0
|
4
|
4
|
|
Limit Level
|
0
|
0
|
0
|
|
Air Quality - 24-hr
TSP
|
Action Level
|
0
|
0
|
0
|
|
Limit Level
|
0
|
0
|
0
|
Table 11-2 Statistical
Summary of Environmental Complaints
|
Reporting Period
|
Environmental Complaint Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
23 October 2014 –
31 July 2016
|
6
|
6
|
Water (5), Air
(1)
|
|
1 August
2016 –
31 October 2016
|
1
|
7
|
Water (6), Air
(1)
|
Table
11-3 Statistical
Summary of Environmental Summons
|
Reporting Period
|
Environmental Summons Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
23 October 2014 –
31 July 2016
|
0
|
0
|
NA
|
|
1
August 2016 –
31 October 2016
|
0
|
0
|
NA
|
Table
11-4 Statistical
Summary of Environmental Prosecution
|
Reporting Period
|
Environmental Prosecution Statistics
|
|
Frequency
|
Cumulative
|
Complaint Nature
|
|
23 October 2014 –
31 July 2016
|
0
|
0
|
NA
|
|
1
August 2016 –
31 October 2016
|
0
|
0
|
NA
|
12.1 General
Requirements
12.1.1
The environmental mitigation measures that
recommended in the Environmental Mitigation and Enhancement Measures
Implementation Schedule (EMIS) for in the Project EM&A Manual covered the
issues of air quality, cultural heritage, ecology, landfill gas hazard, landscape & visual,
noise, water and waste. The
updated EMIS for the Contract is shown in Appendix I.
12.1.2
The Contractor shall implement the required
environmental mitigation measures according to the EM&A Manual as subject
to the site condition. The environmental mitigation measures implemented by the
Contract in this Reporting Period are summarized in Table 12-1 and Appendix I.
Table 12-1 Environmental
Mitigation Measures
|
Issues
|
Environmental Mitigation Measures
|
|
Air Quality
|
· Maintain damp / wet surface
on access road
· Keep slow speed in the sites
· All vehicles must use wheel
washing facility before off site
· Sprayed water during rock
breaking works
· During transportation by truck, materials loaded lower
than the side and tail boards, and covered before transport
· Compacted all soil stockpiles
· Part of the exposed slopes covered geotextile net
|
|
Cultural Heritage
|
· Set a buffer zone between the working area
and the Grave
· All construction materials and equipment store far from
the Grave
· Inspection the Grave to ensure provision mitigation
measures effective
|
|
Ecology
|
·
Wire fencing provided
for temporary protect Pitcher Plants
·
Undertake weekly
inspection of Pitcher Plants
|
|
Landfill Gas Hazard
|
·
Landfill Gas
measurement undertake during trench excavation
|
|
Water Quality
|
· Temporary drainage system
provide for surface runoff prevent discharge to public area
· Wastewater to be treated by
sedimentation tank before discharge.
|
|
Noise
|
· Restrain operation time of
plants from 07:00 to 19:00 on any working day except for Public Holiday and
Sunday.
· Keep good maintenance of
plants
· The noisy plants or works
provide mobile noise barriers
· Shut down the plants when
not in used
|
|
Waste and Chemical
Management
|
· On-site sorting prior to
disposal
· Follow requirements and
procedures of the “Trip-ticket System”
·
Predict required quantity of concrete accurately
· Collect the unused fresh concrete at designated
locations in the sites for subsequent disposal
|
|
General
|
· The site was generally kept
tidy and clean.
|
13.1 Conclusions
13.1.1 This is 8th Quarterly EM&A
report presenting the monitoring results and inspection findings for the
Reporting Period from 1 August to 31 October 2016.
13.1.2 No air
quality monitoring including 1-hour and 24-hour TSP exceedance was recorded in
the Reporting Period.
13.1.3 In this
Reporting Period, no noise complaint was
received by RE, the Contractor, ENPO or HyD. No Action Level exceedances were triggered and no NOE or the associated corrective actions were therefore issued.
13.1.4 Site
inspection for landscape and visual was conducted on weekly basis by the
Landscape Architect to ensure if the existing condition compliance with the
intended aims of the mitigation measures.
Most of the landscape works such as planting was not yet commenced.
13.1.5 Weekly site inspection
and random checking respectively were performed for the transplanted Pitcher Plants in the finial receptor
site. It was observed that the transplanted pitcher
plants were properly protected and the growth was normally in fair condition
except three individuals which appeared poor condition in May 2016 were
certified dead by the specialist. It is
considered that the Pitcher
Plant were establishing after transplanting shock and adapting to the condition
of the Final Receptor Site and establish period for the pitcher plants was
completed at the end of September 2016.
13.1.6 Landfill
gas monitoring was conducted at RW-B & RW-F in August to September 2016 and
at the TD1 and Lung Mun Road
works area on October 2016 by the Safety Officer. The monitoring results shown no
exceedances were triggered.
13.1.7 In the Reporting Period, one (1) environmental complaint was received from
EPD on 3 October 2016 regarding to muddy water entering the drainage system near site entrance-Hand-key
attendance system at Pillar Point, Tuen Mun at around 03:00 to 04:00 after the rainstorm.
Investigation report for the complaint has been conducted by the ET and agreed
by IEC.
13.1.8
No notifications of summons, or
successful prosecution were received by the Contractor during the Reporting
Period.
13.1.9
During
the Reporting Period, 13
events of the joint site inspections were undertaken to evaluate the site
environmental performance. No non-compliance of environmental
impacts were observed, indicating the implemented
mitigation measures for air quality, construction noise and water quality were
effective. Minor deficiencies found
in the weekly site inspection were rectified within the specified deadlines. The environmental performance of the
Project was considered satisfactory.
13.1.10For cultural
heritage, the buffer zone between the working area and the Grave was observed and
no construction material or equipment was stored nearby.
13.1.11No
notifications of summons, or successful prosecution were received by the
Contractor during the Reporting Period.
13.2.1 During dry
season, air quality mitigation measures such as watering of site area for 12
times per day and covering of exposed slopes should be fully implemented to
reduce construction dust impact as recommended in the EMIS.
13.2.2 Moreover,
muddy water or other water pollutants from site surface runoff into the public
areas will be key environment issue.
Special attention should be paid on the water quality mitigation
measures to prevent surface runoff flow to public area.
13.2.3 Good
practice for daily housekeeping is reminded. Clean-up of waste skips and
wastewater treatment system should be increased to ensure these facilities are
functioned effectively.
13.2.4 Stagnant
water should be removed as soon as possible after rain to prevent mosquito
breeding on site.
