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 and Meteorological Data Extracted from Hong Kong Observatory
Appendix E Air Quality
Monitoring Results and their Graphical Presentation
Appendix F Summary of
Event and Action Plan
Appendix G Noise
Monitoring Results and their Graphical Presentation
Appendix H Laboratory
Results for Water Quality
Appendix I Water
Quality Monitoring Results and their Graphical Presentation
Appendix K Implementation
Schedule of Environmental Mitigation Measures (EMIS)
Appendix L Investigation
Report for Exceedances
Appendix M Statistics on
Complaints, Notifications of Summons and Successful Prosecutions
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 January 2014. As informed by the Contractor, the major activities in the reporting period were:
¡P Cable detection and trail trenches;
¡P Tree Felling Works;
¡P Trial Pit Excavation;
¡P Pre-drilling works and piling works;
¡P Extension of box culvert ;
¡P Bored pile wall construction & Catch Fan;
¡P Erection of site office; and
¡P Construction of haul road and temporary soil platform for geotechnical works
Five (5) Action Level exceedances
of 24-hour TSP monitoring were recorded on 2, 8, 14, 25 and 30 January 2014
while one (1) Limit Level exceedance was recorded on
20 January 2014 at the monitoring location AM1(SR77)
in the reporting month.
Investigation for the exceedances have been
conducted and concluded not related to the project works. The investigation reports for the
incidents are presented in Appendix L.
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; hence, no Action Level exceedance was recorded. No Limit Level exceedance of noise was recorded in the reporting month.
One (1) exceedance of Action Level of Turbidity was recorded on 2 January 2014. Two (2) exceedances of Limit Level of Suspended Solids on 15 and 24 January 2014 were recorded in the reporting month. Investigation for the exceedances have been conducted which concluded that the exceedances events were not related to the construction works. The investigation reports for the incidents are presented in Appendix L.
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 Tree felling works, waterworks and excavation works;
¡P Slope upgrading works;
¡P Noise barrier installation;
¡P Extension of box culvert;
¡P Construction of haul road and temporary soil platform for geotechnical works; and
¡P Laying of concrete pipe works.
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 January 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 trail trenches;
¡P Tree Felling Works;
¡P Trial Pit Excavation;
¡P Pre-drilling works and piling works;
¡P Extension of box culvert ;
¡P Bored pile wall construction & Catch Fan;
¡P Erection of site office; and
¡P Construction of haul road and temporary soil platform for geotechnical works
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-RN0747-13 |
4 Dec 2013 |
19 Jan 2014 |
Expired |
-- |
GW-RN0004-14 |
26 Jan 2014 |
22 Jun 2014 |
Valid |
-- |
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) |
Sibata Digital Dust Monitor (Model No. AM 510) |
1 |
11302029 |
High Volume Sampler |
Tisch Total Suspended Particulate Mass Flow Controlled High Volume Air Sampler (Model No. TE-5170 MFC) |
1 |
2359 |
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 and meteorological data extracted from Hong Kong Observatory in the reporting month is provided in Appendix D.
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 E.
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) * |
197.3 |
169.0 ¡V 222.0 |
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) * |
218.4 |
172.0 ¡V 322.8 |
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 Five (5) Action Level exceedances of 24-hour TSP monitoring were recorded on 2, 8, 14, 25 and 30 January 2014 while one (1) Limit Level exceedance was recorded on 20 January 2014 at the monitoring location AM1(SR77) in the reporting month. Investigation for the exceedances have been conducted and concluded not related to the project works. The investigation reports for the incidents are presented in Appendix L.
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 F.
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 and meteorological data extracted from Hong Kong
Observatory in the reporting month is provided in Appendix D.
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 G.
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) |
61 |
57.8 ¡V 63.1 |
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; hence, no Action Level exceedance was recorded. No Limit Level exceedance of noise 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 F.
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 2100 Q (Serial No. 12010C015757) |
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 H.
6.6.1 The schedule for environmental monitoring and meteorological data extracted from Hong Kong Observatory in the reporting month is provided in Appendix D.
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 I.
6.7.3 The possible influences in monitoring results were suspected to be natural variation and possible silty water discharged at up-stream locations.
6.7.4 One (1) exceedance of Action Level of Turbidity was recorded on 2 January 2014. Two (2) exceedances of Limit Level of Suspended Solids on 15 and 24 January 2014 were recorded in the reporting month. Investigation for the exceedances have been conducted which concluded that the exceedances events were not related to the construction works. The investigation reports for the incidents are presented in Appendix L.
6.7.5 The Event and Action Plan for the occurrence of non-compliance of the water quality criteria is annexed in Appendix F.
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 493m3 of excavated material has been generated. 409m3 of inert C&D materials was disposed of at public fill to Tuen Mun Area 38. No inert C&D materials were reused on site. 110kg of general refuse was disposed of at North East New Territories (NENT) Landfill. 10kg of plastics and no paper/cardboard packaging and metals were collected by recycling contractor in the reporting month. No chemical waste was collected by licensed contractor in the reporting period. Details of the waste management data are presented in Appendix J.
7.1.3 The Contractor was advised to properly maintain the on-site C&D materials and waste collection, sorting and recording system, and maximize the reuse/recycle of C&D materials and wastes. The Contractor was also reminded to properly maintain the site tidiness and dispose of wastes accumulated site regularly and properly.
7.1.4 The Contractor was reminded that chemical waste containers should be properly treated and stored temporarily in the designated chemical waste storage area on-site in accordance with the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.
Table 8.1 Observations and Recommendations of Site Audit
Parameters |
Date |
Observations
and Recommendations |
Follow-up |
Water Quality |
30 Dec 2013 |
Observation: Muddy runoff was
observed leaving the box culvert extension works area to the stream. The
Contractor should implement sufficient and proper mitigation measures to
avoid such issue to occur. |
The Contractor
has constructed concrete bund at the boundary of earth works closed to the
stream. No muddy runoff was observed entering the stream during the ET¡¦s site
inspection on 6 Jan 2013. |
Air Quality |
18 Dec 2013 |
Reminder: The Contractor
was reminded to cover the stockpile on site entirely with impervious
sheeting. |
The stockpiles
were fully covered with impervious sheeting while they were not in use. |
6 Jan 2014 |
Reminder: The Contractor
was reminded to implement water spraying for the unpaved areas at the southern
end of works area (i.e. near the footbridge above MTR East Rail Line). |
The Contractor
has implemented water spraying more frequently for the unpaved areas at the
southern end of works area (i.e. near the footbridge above MTR East Rail
Line) as observed during the site inspection on 13 Jan 2014. |
|
13 Jan 2014 |
Reminder: The Contractor
was reminded to implement sufficient water spraying for dust suppression on
exposed area and stockpile. |
The Contractor
has implemented covering for stockpile and sufficient water spraying for dust
suppression on exposed area as observed during the site inspection on 20 Jan
2014. |
|
20 Jan 2014 |
Reminder: The Contractor
was reminded to ensure the vehicles are clean before leaving the wheel
washing bay. |
The Contractor
has ensured the vehicles are clean before leaving the wheel wash bay as
observed during the site inspection on 27 Jan 2014. |
|
27 Jan 2014 |
Observation: Several
stockpiles were observed without proper covering at the southern end of works
area. The Contractor should cover the stockpiles with impervious sheeting or
provide sufficient watering on the stockpiles. |
Stockpiles are
either removed or covered in tarpaulin as observed during the site inspection
on 5 Feb 2014. |
|
27 Jan 2014 |
Reminder: The Contractor
was reminded to cover the exposed slope properly with impervious sheeting. |
The exposed slope
has been covered with tarpaulin as observed during the site inspection on 5
Feb 2014. |
|
Noise |
N/A |
N/A |
N/A |
Waste / Chemical
Management |
13 Jan 2014 |
Observation: The Contractor
should ensure the provision of sufficient drip tray for chemical drums
onsite. |
The chemical
drums were removed as observed during the site inspection on 20 Jan 2014. |
20 Jan 2014 |
Observation: Oil stains were
observed on the road near the wheel washing bay. The Contractor should treat
the oil stains properly and review the vehicles¡¦ condition onsite. |
The oil stains on
the road near the wheel wash bay were removed as observed during the site
inspection on 27 Jan 2014. |
|
20 Jan 2014 |
Observation: General refuse
were observed on ground at the steel bar storage area. The Contractor should
remove the wastes and provide sufficient rubbish bin for workers onsite. |
The general
refuse on ground at the steel bar storage area was removed and waste bag was
provided for temporary storage as observed during the site inspection on 27
Jan 2014. |
|
Landscape &
Visual |
13 Jan 2014 |
Observation: The Contractor
should ensure the provision of sufficient tree protection zone for all trees
to be transplanted or retained. |
Sufficient tree
protection zone was provided by the Contractor for retained trees and trees
to be transplanted as observed during the site inspection on 20 Jan 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 K. 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 January 2014 |
10.1.1 Five (5) Action Level exceedances of 24-hour TSP monitoring were recorded on 2, 8, 14, 25 and 30 January 2014 while one (1) Limit Level exceedance was recorded on 20 January 2014 at the monitoring location AM1(SR77) in the reporting month. Investigation for the exceedances have been conducted and concluded not related to the project works. The investigation reports for the incidents are presented in Appendix L.
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; hence, no Action Level exceedance was recorded. No Limit Level exceedance of noise was recorded in the reporting month.
10.1.4 One (1) exceedance of Action Level of Turbidity was recorded on 2 January 2014. Two (2) exceedances of Limit Level of Suspended Solids on 15 and 24 January 2014 were recorded in the reporting month. Investigation for the exceedances have been conducted which concluded that the exceedances events were not related to the construction works. The investigation reports for the incidents are presented in Appendix L.
10.2.1 No environmental non-compliance was recorded in the reporting month. The cumulative statistics are provided in Appendix M.
10.3.1 No environmental complaint was received in the reporting month. The cumulative statistics are provided in Appendix M.
10.4.1 No environmental related prosecution or notification of summons was received in the reporting month. The cumulative statistics are provided in Appendix M.
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 Tree felling works, waterworks and excavation works;
¡P Slope upgrading works;
¡P Noise barrier installation;
¡P Extension of box culvert;
¡P Construction of haul road and temporary soil platform for geotechnical works; and
¡P Laying of concrete pipe works.
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; and
¡P Expose slopes and dusty stockpile should be covered up properly if no temporary work will be conducted.
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 Five (5) Action Level exceedances of 24-hour TSP monitoring were recorded on 2, 8, 14, 25 and 30 January 2014 while one (1) Limit Level exceedance was recorded on 20 January 2014 at the monitoring location AM1(SR77) in the reporting month. Investigation for the exceedances have been conducted and concluded not related to the project works. The investigation reports for the incidents are presented in Appendix L.
12.1.4 No exceedance of Action and Limit Level was recorded for 1-hour TSP monitoring at the monitoring location (SR77) in the reporting month.
12.1.5 No noise complaint was received in the reporting month; hence, no Action Level exceedance was recorded. No Limit Level exceedance of noise was recorded in the reporting month.
12.1.6 One (1) exceedance of Action Level of Turbidity was recorded on 2 January 2014. Two (2) exceedances of Limit Level of Suspended Solids on 15 and 24 January 2014 were recorded in the reporting month. Investigation for the exceedances have been conducted which concluded that the exceedances events were not related to the construction works. The investigation reports for the incidents are presented in Appendix L.
12.1.7 Four (4) environmental site inspection was 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 Implement proper mitigation measures (e.g. sand bags and/or earth bunds) to avoid earth, mud and debris leaving the works area via storm water drainage; and
¡P Enhance wheel washing for all vehicles leaving the construction site.
¡P Implement proper mitigation measures (e.g. sand bags and/or earth bunds) to avoid earth, mud and debris leaving the works area via storm water drainage; and
¡P Ensure drainage facilities erosion and sediment control structures are well maintained and inspected regularly.
¡P Ensure the provision of drip tray for chemical being stored on site to avoid chemical spillage.
¡P Ensure the provision of tree protection zone for all existing trees to be transplanted or retained.