Contents
2.3 Construction
Programme and Activities
3 STATUS OF ENVIRONMENTAL
LICENSES, NOTIFICATION AND PERMITS
4.4 Monitoring Parameters, Frequency and
Duration
4.6 Monitoring
Schedule for the Reporting month
5.4 Monitoring
Parameters, Frequency and Duration
5.6 Monitoring Schedule for the Reporting Month
6.3 Monitoring Parameters, Frequency and
Duration
6.6 Monitoring
Schedule for the Reporting Month
8 ENVIRONMENTAL SITE
INSPECTION AND AUDIT
9 IMPLEMENTATION STATUS OF
ENVIRONMENTAL MITIGATION MEASURES
10 ENVIRONMENTAL NON-CONFORMANCE
10.1 Summary
of Monitoring Exceedances
10.2 Summary
of Environmental Non-Compliance
10.3 Summary
of Environmental Complaints
10.4 Summary
of Environmental Summon and Successful Prosecutions
11.1 Construction
Programme for the Next Month
11.2 Key
Issues for the Coming Month
11.3 Monitoring
Schedule for the Next Month
12 CONCLUSIONS AND RECOMMENDATIONS
Table 2.1 Contact Information of Key Personnel
Table
3.1 Status
of Environmental Licenses, Notifications and Permits
Table
4.1 Air
Quality Monitoring Equipment
Table
4.2 Location
of Air Quality Monitoring
Table
4.3 Air
Quality Monitoring Parameters, Frequency and Duration
Table
4.4 Summary
of 1-hr TSP Monitoring Results
Table
4.5 Summary
of 24-hr TSP Monitoring Results
Table
5.1 Noise
Monitoring Equipment
Table
5.2 Location
of Noise Monitoring
Table
5.3 Noise
Monitoring Parameters, Frequency and Duration
Table
5.4 Summary
of Noise Monitoring Results
Table
6.1 Water
Quality Monitoring Equipment
Table
6.2 Water
Quality Monitoring Parameters, Frequency and Duration
Table
6.3 Locations
of Water Quality Monitoring
Table
6.4 Action
and Limit Levels for Water Quality Monitoring
Table
8.1 Observations
and Recommendations of Site Audit
Table
9.1 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 Meteorological
Data Extracted from Hong Kong Observatory
Appendix F Air Quality
Monitoring Results and their Graphical Presentation
Appendix G Summary of
Event and Action Plan
Appendix H Noise Monitoring
Results and their Graphical Presentation
Appendix I Laboratory
Results for Water Quality
Appendix J Water
Quality Monitoring Results and their Graphical Presentation
Appendix L Implementation
Schedule of Environmental Mitigation Measures (EMIS)
Appendix M Investigation Report
for Exceedances
Appendix N Statistics on
Complaints, Notifications of Summons and Successful Prosecutions
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 February 2014. As informed by the Contractor, the major activities in the reporting period were:
¡P
Cable detection and trial trenches;
¡P
Tree felling works;
¡P
Pre-drilling works and piling works;
¡P
Extension of box culvert ID04, ID05 and BC01;
¡P
Bored pile wall construction;
¡P
Construction of haul road and temporary soil platform for geotechnical
works;
¡P
Slope upgrading works;
¡P
Noise barrier installation; and
¡P
Waterworks.
Two (2) Action Level exceedances
of 24-hour TSP monitoring were recorded at the monitoring location AM1(SR77) on 22 and 28 February 2014 in the reporting
month. Investigation for the exceedances was conducted which concluded that the exceedances was not related to the project works. The investigation reports for the incidents are
presented in Appendix M.
No exceedance of
Action and Limit Level was recorded for 1-hour TSP monitoring at the monitoring
location AM1(SR77) in the reporting month.
No noise complaint was received in the reporting month, so no Action Level exceedance was recorded. Also, no Limit Level exceedance of noise monitoring was recorded in the reporting month.
One (1) exceedance
of Limit Level of Suspended Solids was recorded at the monitoring location I5
on 7 February 2014 in the reporting month.
Investigation for the exceedance was conducted
which concluded that the exceedance was not related
to the project works. The
investigation reports are presented in Appendix
M.
No complaint, notification of summons and
successful prosecution was received in the reporting month.
There was no reporting of change recorded in
the reporting month.
The major construction works in the coming
reporting month are anticipated to include:
¡P
Cable detection and trial trenches;
¡P
Pre-drilling works and piling works;
¡P
Extension of box culvert ID04, ID05 and BC01;
¡P
Pile cap works;
¡P
Tree felling and transplanting works, waterworks;
¡P
Slope upgrading works;
¡P
Noise barrier installation;
¡P
Construction of haul road and temporary soil platform for geotechnical
works ;
¡P
Laying of concrete pipe works; and
¡P
Bored pile wall 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.
1.1.1 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 / Fanling Highway between Island House Interchange and Fanling Stage 2. Meinhardt Infrastructure & Environment Ltd (MIEL) has been appointed by Chun Wo as the Environmental Team (ET) to fulfill the corresponding EM&A requirements pursuant to Environmental Permit No. EP-324/2008/A in accordance with the Updated EM&A Manual (dated October 2013) for Widening of Tolo Highway/Fanling Highway between Island House Interchange and Fanling Stage 2. The EM&A programme commenced in 5 November 2013.
1.2.1 This is the monthly EM&A Report which summaries the impact monitoring results and audit findings for the Project during the reporting month of February 2014.
1.3.1 This monthly EM&A Report comprises the following sections:
¡P Section 1: Introduction
¡P Section 2: Project Information
¡P Section 3: Status of Environmental Licenses, Notifications and Permits
¡P Section 4: Air Quality Monitoring
¡P Section 5: Noise Monitoring
¡P Section 6: Water Monitoring
¡P Section 7: Waste Management
¡P Section 8: Environmental Site Inspection and Audit
¡P Section 9: Implementation Status of Environmental Mitigation Measures
¡P Section 10: Environmental Non-conformance
¡P Section 11: Future Key Issues
¡P Section 12: Conclusions and Recommendations
2.1.1 Tolo Highway and Fanling Highway are expressways in the North East New Territories connecting Sha Tin, Tai Po and Fanling. These highways form a vital part of the strategic Route 1, which links Hong Kong Island to Shenzhen. At present, this section of Route 1 is a dual 3-lane carriageway. However, at several major interchanges along this section of Route 1, the highway is only dual-2 lane. Severe congestion is a frequent occurrence during peak periods, particularly in the Kowloon bound direction.
2.1.2 The objective of the Widening of Tolo Highway / Fanling Highway between Island House Interchange and Fanling is 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.
2.1.3 The construction works for the Widening of Tolo Highway / Fanling Highway between Island House Interchange and Fanling are to be delivered in 2 stages:
¡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 / Fanling Highway between Island House Interchange and Fanling (hereafter called ¡§the Project¡¨) is entrusted to the contractor of Contract No. CV/2012/09 Liantang / Heung Yuen Wai Boundary Control Point Site Formation and Infrastructure Works Contract 3, i.e. Chun Wo. AECOM Asia Co Ltd was appointed by the CEDD as the consultant for the design and construction assignment for the Liantang development.
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 / Fanling Highway between Island House Interchange and Fanling Stage 2 include:
¡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 / Fanling Highway between Island House Interchange and Fanling Stage 2.
2.3.1 The major construction activities undertaken in the reporting month are summarized below:
¡P
Cable detection and trial trenches;
¡P
Tree felling works;
¡P
Pre-drilling works and piling works;
¡P
Extension of box culvert ID04, ID05 and BC01;
¡P
Bored pile wall construction;
¡P
Construction of haul road and temporary soil platform for geotechnical
works;
¡P
Slope upgrading works;
¡P
Noise barrier installation; and
¡P
Waterworks.
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.
|
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. |
2638 6115 |
|||
Environmental Officer |
Mr. Sam Lam |
2638 6147 |
|||
Meinhardt |
Environmental Team (ET) |
ET Leader |
Mr. Fredrick Leong |
2859 1739 |
2540 1580 |
3.1.1 The relevant environmental licenses, permits and/or notifications on environmental protection for this Project and valid in the reporting month are summarized in Table 3.1.
Table 3.1 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-RN0004-14 |
26 Jan 2014 |
22 Jun 2014 |
Valid |
For tree felling / transplanting works |
GW-RN0109-14 |
25 Feb 2014 |
17 May 2014 |
Valid |
For erection of catch fence in the night time |
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 |
-- |
4.1.1 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.
4.2.1 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 4.1.
Table 4.1 Air Quality Monitoring Equipment
Equipment |
Brand and Model |
Quantity |
Serial Number |
Portable direct reading dust meter (1-hr TSP) |
TSI (Model No. AM 510) |
1 |
11008019 |
High Volume Sampler |
Tisch Total Suspended Particulate Mass Flow Controlled High Volume Air Sampler (Model No. TE-5170 MFC) |
1 |
2359 |
4.2.2 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.
4.2.3 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.
4.3.1 Air quality monitoring was conducted at the location specified in the Updated EM&A Manual. Table 4.2 describes the details of the air quality monitoring station with its location as shown in Figure 2.
Table 4.2 Location of Air Quality Monitoring
Air Monitoring Station ID |
Monitoring Location |
Description |
AM1(SR77) * |
Yuen Leng 2(1) |
Residential, Ground floor |
Remark:
* 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
4.4.1 Table 4.3 summarizes the monitoring parameters, frequency and duration of impact TSP monitoring.
Table 4.3 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 |
4.5.1 With the consideration of criteria stated in the Updated EM&A Manual, the HVS was installed in the vicinity of the air sensitive receivers.
4.5.2 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).
4.5.3 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.
4.5.4 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.
4.5.5 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.
4.5.6 All the collected samples were kept in a good condition for 6 months before disposal.
4.5.7 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.
4.5.8 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.
4.6.1 The schedule for environmental monitoring for the reporting month is provided in Appendix D. Meteorological data extracted from Hong Kong Observatory for the reporting month is provided in Appendix E.
4.7.1 The monitoring results for 1-hr and 24-hr TSP are summarised in Table 4.4 and Table 4.5 respectively. Detailed air quality monitoring results and the graphical presentation of air quality monitoring data for the current and past two reporting months are presented in Appendix F.
Table 4.4 Summary of 1-hr TSP Monitoring Results
ASR ID |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
AM1(SR77) * |
182.1 |
147.0 ¡V 221.0 |
292.7 |
500 |
Remark:
* 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 4.5 Summary of 24-hr TSP Monitoring Results
ASR ID |
Average (mg/m3) |
Range (mg/m3) |
Action Level (mg/m3) |
Limit Level (mg/m3) |
AM1(SR77) * |
156.2 |
69.9 ¡V 221.5 |
170.3 |
260 |
Remark:
* 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
4.7.2 Two (2) Action Level exceedances of 24-hour TSP monitoring were recorded at the monitoring location AM1(SR77) on 22 and 28 February 2014 in the reporting month. Investigation for the exceedances was conducted which concluded that the exceedances were not related to the project works. The investigation reports for the incidents are presented in Appendix M.
4.7.3 No exceedance of Action and Limit Level was recorded for 1-hour TSP monitoring at the monitoring location AM1(SR77) in the reporting month.
4.7.4 The Event and Action Plan for the occurrence of non-compliance of the air quality criteria is annexed in Appendix G.
4.7.5 Details of monitoring conditions including influencing factors such as weather conditions and site observation are presented in Appendix E.
5.1.1 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.
5.2.1 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 5.1.
Table 5.1 Noise Monitoring Equipment
Equipment |
Brand and Model |
Quantity |
Serial Number |
Acoustic Calibrator |
B&K (Model No. 4231) |
1 |
2685684 |
Integrated Sound Level Meter |
Rion (Model No. NL-52) |
1 |
00220553 |
5.2.2 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.
5.3.1 Impact noise monitoring was conducted at the location specified in the Updated EM&A Manual. Table 5.2 describes the details of the noise monitoring station with its location as shown in Figure 2.
Table 5.2 Location of Noise Monitoring
NSR ID |
Monitoring Location |
Description |
M1(SR77) * |
Yuen Leng 2(1) |
Residential, Ground floor |
Remark:
* 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
5.4.1 Table 5.3 summarizes the monitoring parameters, frequency and duration of impact noise monitoring.
Table 5.3 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 |
5.5.1
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.
5.6.1 The schedule for environmental monitoring for the reporting month is provided in Appendix D. Meteorological data extracted from Hong Kong Observatory for the reporting month is provided in Appendix E.
5.7.1
The monitoring results for noise are summarized in Table 5.4 and the monitoring results and
the graphical presentation of noise level for the
current and past two reporting months are presented in Appendix H.
Table 5.4 Summary of Noise Monitoring Results
Noise Monitoring Station ID |
Average,
dB(A), Leq (30min) (2) |
Range,
dB(A), |
Action Level |
Limit Level, dB(A) |
M1(SR77) (1) |
60.1 |
54.5 ¡V 65.5 |
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
5.7.2 Major noise sources during the noise monitoring included construction activities of the Project and that along Tai Wo Service Road East, and nearby traffic noise.
5.7.3 No noise complaint was received in the reporting month, so no Action Level exceedance was recorded. Also, no Limit Level exceedance of noise monitoring was recorded in the reporting month.
5.7.4 The Event and Action Plan for the occurrence of non-compliance of the noise criteria is annexed in Appendix G.
6.1.1 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.
6.2.1 The equipment used in the water quality monitoring programme is summarised in Table 6.1.
Table 6.1 Water Quality Monitoring Equipment
Equipment |
Model and Make |
Turbidity meter |
HACH Model 2100Q is (Serial No. 11050C001264) |
Multimeter (Scope of Test: Conductivity, Dissolved Oxygen, pH, Salinity and Temperature) |
YSI
Proplus (Serial
No. 09K100735) |
6.2.2 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.
6.3.1 Measurements for each monitoring station were conducted 3 days per week for the reporting month. Table 6.2 summarises the monitoring parameters, frequency and duration of the baseline water quality monitoring.
Table 6.2 Water Quality Monitoring Parameters, Frequency and Duration
Monitoring Stations |
Parameter, unit |
Frequency |
Control Stations: C3a and C3b Impact Station: I5 |
- Depth, m - Temperature, ¢XC - Salinity, ppt - pH - DO,
mg/L - DO
Saturation, % - Turbidity, NTU - SS, mg/L |
3 days per week |
6.4.1 According to the Updated EM&A Manual, measurements were taken at all impact and control stations as summarised in Table 6.3. The locations of the monitoring stations are shown in Figure 3.
Table 6.3 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 |
6.5.1 The parameters of in-situ measurements included water depth, dissolved oxygen (DO), dissolved oxygen saturation (DOS), turbidity level, pH value and water temperature.
6.5.2 Since water depths for all monitoring stations were less than 1m throughout the whole baseline measurement period, only mid-depth level was monitored.
6.5.3 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.
6.5.4 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 I.
6.6.1 The schedule for environmental monitoring for the reporting month is provided in Appendix D. Meteorological data extracted from Hong Kong Observatory for the reporting month is provided in Appendix E.
6.7.1 The water quality criteria, namely Action and Limit Levels, as specified in the Updated EM&A Manual are shown in Table 6.4.
Table 6.4 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 |
81.9NTU or 120% of upstream control station¡¦s Tby of the same day |
91.9NTU or 130% of upstream control station¡¦s Tby of the same day |
Notes:
For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits.
For SS and Tby, non-compliance of the water quality limits occurs when monitoring result is higher than the limits.
6.7.2 The detailed water quality monitoring results and the graphical presentation of water quality monitoring data for the current and past two reporting months are presented in Appendix J.
6.7.3 The possible influences in monitoring results were suspected to be natural variation.
6.7.4 One (1) exceedance of Limit Level of Suspended Solids at the monitoring location I5 on 7 February 2014 was in the reporting month. Investigation for the exceedance was conducted which concluded that the exceedance was not related to the project works. The investigation reports for the incidents are presented in Appendix M.
6.7.5 The Event and Action Plan for the occurrence of non-compliance of the water quality criteria is annexed in Appendix G.
7.1.1 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.
7.1.2 As advised by the Contractor, a total of 2,209m3 of excavated material has been generated. 1,473m3 of inert C&D materials was disposed of at public fill to Tuen Mun Area 38. 0.38m3 of inert C&D materials was reused on site. 40m3 of general refuse was disposed of at North East New Territories (NENT) Landfill. No plastics, paper/cardboard packaging was collected, and 2m3 of metals was collected by recycling contractor in the reporting month. 19m3 of chemical waste was collected by licensed contractor in the reporting period. Details of the waste management data are presented in Appendix K.
7.1.3 In the reporting month, the Contractor was reminded to properly maintain the site tidiness and dispose of wastes accumulated site regularly and properly.
8.1.2 In the reporting month, 4 site inspections were carried out on 5, 10, 17 and 24 February 2014. The one held on 24 February 2014 was a joint inspection with the IEC, ER, ET and Contractor. No site inspection was conducted by the EPD during the reporting month. No non-compliance was recorded during the site inspection. A summary of the reminders and observations recorded during the site inspections are presented in Table 8.1.
Table 8.1 Observations and Recommendations of Site Audit
Parameters |
Date |
Observations
and Recommendations |
Follow-up |
Water Quality |
N/A |
N/A |
N/A |
Air Quality |
5 Feb 2014 |
Observation: Exposed slope at
Gate SA13 needs enhancement on dust suppression. (watering or covering) |
Watering has been
carried out at the exposed slope at Gate SA13 as observed during the site
inspection on 10 Feb 2014. |
24 Feb 2014 |
Reminder: Exposed earth are
reminded to be minimized or compacted as far as possible, especially before
holidays at Site SA13 |
The stockpiles have been reduced in size and been compacted as
observed during the site inspection on 3 Mar 2014 |
|
24 Feb 2014 |
Reminder: Watering at
southern part of construction site SA12 is reminded to enhance watering |
The area has been watered and compacted as observed during the site
inspection on 3 Mar 2014. |
|
Noise |
N/A |
N/A |
N/A |
Waste / Chemical
Management |
10 Feb 2014 |
Observation: General site
cleanliness need improvement at Gate SA12. |
The site
cleanliness was improved. Rubbish bins and also recycle bins have been
provided at the site as observed during the site inspection on 17 Feb 2014. |
Landscape &
Visual |
10 Feb 2014 |
Observation: Fences at trees
at southern end of the site at Gate SA12 need enhancement. |
Trees at southern
end of the site at Gate SA12 have been already removed and no mitigation
measures would be necessary as observed during the site inspection on 17 Feb
2014. |
24 Feb 2014 |
Reminder: Trees at Site
SA12 is reminded to be fenced properly |
The area has been screened off properly as observed during the site
inspection on 3 Mar 2014. |
|
Permits /
Licenses |
N/A |
N/A |
N/A |
9.1.1 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 L. The status of the required submissions under the EP during the reporting period is summarized in Table 9.1.
Table 9.1 Status of Required Submission under Environmental Permit
EP Condition |
Submission |
Submission Date |
Condition 3.3 |
Monthly EM&A Report |
14 February 2014 |
9.1.2 The Quarterly EM&A Summary Report (November 2013 to January 2014) was prepared and submitted on 14 February 2014 in accordance to Section 8.3.4 of the EM&A Manual.
10.1.1 Two (2) Action Level exceedances of 24-hour TSP monitoring were recorded at the monitoring location AM1(SR77) on 22 and 28 February 2014 in the reporting month. Investigation for the exceedances was conducted which concluded that the exceedances were not related to the project works. The investigation reports for the incidents are presented in Appendix M.
10.1.2 No exceedance of Action and Limit Level was recorded for 1-hour TSP monitoring at the monitoring location AM1(SR77) in the reporting month.
10.1.3 No noise complaint was received in the reporting month, so no Action Level exceedance was recorded. Also, no Limit Level exceedance of noise monitoring was recorded in the reporting month.
10.1.4 One (1) exceedance of Limit Level of Suspended Solids at the monitoring location I5 on 7 February 2014 was recorded in the reporting month. Investigation for the exceedance was conducted which concluded that the exceedance was not related to the project works. The investigation reports for the incidents are presented in Appendix M.
10.2.1 No environmental non-compliance was recorded in the reporting month. The cumulative statistics are provided in Appendix N.
10.3.1 No environmental complaint was received in the reporting month. The cumulative statistics are provided in Appendix N.
10.4.1 No environmental related prosecution or notification of summons was received in the reporting month. The cumulative statistics are provided in Appendix N.
11.1.1 The major construction works in the coming reporting month are anticipated to include:
¡P
Cable detection and trial trenches;
¡P
Pre-drilling works and piling works;
¡P
Extension of box culvert ID04, ID05 and BC01;
¡P
Pile cap works;
¡P
Tree felling and transplanting works, waterworks;
¡P
Slope upgrading works;
¡P
Noise barrier installation;
¡P
Construction of haul road and temporary soil platform for geotechnical
works ;
¡P
Laying of concrete pipe works; and
¡P
Bored pile wall construction.
11.2.1 Key issues to be considered in the coming month are anticipated to include:
¡P Site runoff should be properly collected and treated prior to discharge;
¡P Properly maintain all drainage facilities and wheel washing facilities on site;
¡P Chemical, chemical waste and waste management;
¡P Tree protective measures for all retained trees should be well maintained;
¡P Expose slopes and dusty stockpile should be covered up properly if no temporary work will be conducted; and
¡P Operation of construction plant should be sequenced where practicable.
11.3.1 The tentative schedule for environmental monitoring for the coming month is provided in Appendix D.
12.1.1 The construction phase EM&A programme of the Project commenced on 5 November 2013.
12.1.2 The 1-hr TSP, 24-hr TSP, noise and water monitoring were carried out in the reporting period.
12.1.3 Two (2) Action Level exceedances of 24-hour TSP monitoring were recorded at the monitoring location AM1(SR77) on 22 and 28 February 2014 in the reporting month. Investigation for the exceedances was conducted which concluded that the exceedances were not related to the project works. The investigation reports for the incidents are presented in Appendix M.
12.1.4 No exceedance of Action and Limit Level was recorded for 1-hour TSP monitoring at the monitoring location AM1(SR77) in the reporting month.
12.1.5 No noise complaint was received in the reporting month, so no Action Level exceedance was recorded. Also, no Limit Level exceedance of noise monitoring was recorded in the reporting month.
12.1.6 One (1) exceedance of Limit Level of Suspended Solids was recorded at the monitoring location I5 on 7 February 2014 in the reporting month. Investigation for the exceedance was conducted which concluded that the exceedance was not related to the project works. The investigation reports for the incidents are presented in Appendix M.
12.1.7 Four (4) environmental site inspections were carried out in the reporting month. Recommendations on remedial actions were given to the Contractors for the deficiencies identified during the site audit.
12.2.1 According to the environmental site inspections performed in the reporting month, the following recommendations were provided:
¡P Watering of exposed slope and earths to avoid fugitive dust emission.
¡P Improving site cleanliness especially avoid general refuse being left within the construction site.
¡P Ensuring the provision of tree protection zone for all existing trees to be transplanted or retained.