Contents
Page
EXECUTIVE
SUMMARY iv
1 INTRODUCTION 1
1.2........ Purpose of the
Report.............................................................................................. 1
1.3........ Report
Structure...................................................................................................... 1
2 PROJECT
INFORMATION 1
2.1........ Background.............................................................................................................. 1
2.2........ Site Description........................................................................................................ 1
2.3........ Construction
Programme and Activities.................................................................. 1
2.4........ Project Organisation................................................................................................ 1
3 STATUS
OF ENVIRONMENTAL LICENSES, NOTIFICATION AND PERMITS 1
4 AIR
QUALITY MONITORING 1
4.1........ Monitoring
Requirement........................................................................................... 1
4.2........ Monitoring
Equipment.............................................................................................. 1
4.3........ Monitoring Location.................................................................................................. 1
4.4........ Monitoring Parameters, Frequency and Duration.................................................... 1
4.5........ Monitoring
Methodology............................................................................................ 1
4.6........ Monitoring
Schedule for the Reporting month......................................................... 1
4.7........ Monitoring
Results................................................................................................... 1
5 NOISE
MONITORING 1
5.1........ Monitoring Requirements......................................................................................... 1
5.2........ Monitoring Equipment.............................................................................................. 1
5.3........ Monitoring
Locations................................................................................................ 1
5.4........ Monitoring
Parameters, Frequency and Duration.................................................... 1
5.5........ Monitoring Methodology............................................................................................ 1
5.6........ Monitoring Schedule for the Reporting Month.......................................................... 1
5.7........ Monitoring Results................................................................................................... 1
6 WATER
MONITORING 1
6.1........ Monitoring Requirements......................................................................................... 1
6.2........ Monitoring Equipment.............................................................................................. 1
6.3........ Monitoring Parameters, Frequency and Duration.................................................... 1
6.4........ Monitoring Locations................................................................................................ 1
6.5........ Monitoring
Methodology............................................................................................ 1
6.6........ Monitoring
Schedule for the Reporting Month.......................................................... 1
6.7........ Monitoring
Results................................................................................................... 1
7 WASTE
MANAGEMENT 1
8 ENVIRONMENTAL
SITE INSPECTION AND AUDIT 1
8.1........ Site Inspection.......................................................................................................... 1
9 IMPLEMENTATION
STATUS OF ENVIRONMENTAL MITIGATION MEASURES 1
10 ENVIRONMENTAL
NON-CONFORMANCE 1
10.1...... Summary of
Monitoring Exceedances..................................................................... 1
10.2...... Summary of
Environmental Non-Compliance......................................................... 1
10.3...... Summary of
Environmental Complaints.................................................................. 1
10.4...... Summary of
Environmental Summon and Successful Prosecutions.................... 1
11 FUTURE KEY
ISSUES 1
11.1...... Construction
Programme for the Next Month.......................................................... 1
11.2...... Key Issues for
the Coming Month............................................................................ 1
11.3...... Monitoring
Schedule for the Next Month.................................................................. 1
12 CONCLUSIONS AND
RECOMMENDATIONS 1
12.1...... Conclusions............................................................................................................. 1
12.2...... Recommendations.................................................................................................. 1
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 1 Demarcation
of Entrusted Portion of Widening of
Figure 2 Air
and Noise Monitoring Locations
Figure 3 Water
Quality Monitoring Locations
List of Appendices
Appendix A Construction
Programme
Appendix B Project
Organization Structure
Appendix C Calibration
Certificates of Monitoring Equipment
Appendix D EM&A
Monitoring Schedules
Appendix E Air
Quality Monitoring Results and their Graphical Presentation
Appendix F Summary
of Event and Action Plan
Appendix G Noise
Monitoring Results and their Graphical Presentation
Appendix H Laboratory
Results for Water Quality
Appendix I Water
Quality Monitoring Results and their Graphical Presentation
Appendix J Waste
Flow Table
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 December 2013. 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;
¡P Erection of site office; and
¡P Construction of haul road and temporary soil platform for geotechnical works.
Investigation for the exceedances events on 16, 22 and 28 November 2013 for 24-hour TSP monitoring have been completed. The exceedances were considered not related to the construction works and the respective investigation reports are presented in Appendix L.
Three (3) Action Level exceedances of 24-hour TSP monitoring were recorded on 4, 21 and 27 December 2013 while one (1) Limit Level exceedance was recorded on 10 December 2013 at the monitoring location (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 (SR77) in the
reporting month.
No Action Level exceedance was recorded since no noise related complaint was received in the reporting month.
No exceedance of Limit Level of noise was recorded at the monitoring location (SR77) in the reporting month.
Two (2) exceedances of Limit Level on Turbidity were recorded on 18 and 27 December 2013. One (1) exceedance of Action Level on 6 December 2013 and one (1) exceedance of Limit Level on Suspended Solids on 18 December 2013 were recorded in the reporting month. Investigation for the exceedances had been conducted which concluded that the exceedances event on 6 December 2013 on Suspended Solids and on 27 December 2013 on Turbidity were not related to the construction works while the exceedance event on 18 December 2013 on both Suspended Solids and Turbidity were considered related to a leakage of the diverted river through the concrete blocks. Necessary remedy actions have been completed and 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 Erection of site office;
¡P Cable detection and trial trenches;
¡P Pre-drilling works and piling works;
¡P Tree felling works, waterworks and excavation works;
¡P Dismantling works for abandoned houses;
¡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 December 2013.
1.3.1 This monthly EM&A Report comprises the following sections:
¡P Section 1: Introduction
¡P Section 2: Project Information
¡P Section 3: Air Quality Monitoring
¡P Section 4: Noise Monitoring
¡P Section 5: Water Monitoring
¡P Section 6: Waste Management
¡P Section 7: Environmental Site Inspection and Audit
¡P Section 8: Implementation Status of Environmental Mitigation Measures
¡P Section 9: Environmental Non-conformance
¡P Section 10: Future Key Issues
¡P Section 11: Conclusions and Recommendations
2.1.1 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;
¡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-RN0663-13 |
12/11/2013 |
Cancelled on 4/12/2013 |
Valid |
For a section of |
GW-RN0747-13 |
4/12/2013 |
19/01/2014 |
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(1); SR77(1) |
Yuen Leng 2(1) |
Residential, Ground floor |
Remark:
(1) Location / Station / ASR ID as identified in Updated EM&A Manual / EIA Report for Widening of 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 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 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) |
SR77 (AM1) * |
201.1 |
147.0 ¡V 283.0 |
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) |
SR77 (AM1) * |
212.6 |
23.7 ¡V 358.6 |
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 Investigation for the exceedances events on 16, 22 and 28 November 2013 for 24-hour TSP monitoring have been completed. The exceedances were considered not related to the construction works and the respective investigation reports are presented in Appendix L.
4.7.3 Three (3) Action Level exceedances of 24-hour TSP monitoring were recorded on 4, 21 and 27 December 2013 while one (1) Limit Level exceedance was recorded on 10 December 2013 at the monitoring location (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.
4.7.4 Investigation for the exceedance events in November 2013 have been completed. The investigation reports for the incidents are presented in Appendix L.
4.7.5 No exceedance of Action and Limit Level was recorded for 1-hour TSP monitoring at the monitoring location (SR77) in the reporting month.
4.7.6 The Event and Action Plan for the occurrence of non-compliance of the air quality criteria is annexed in Appendix F.
4.7.7 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(1), SR77(1) |
Yuen Leng 2(1) |
Residential, Ground floor |
Remark:
(1) Location / Station / NSR ID as identified in Updated EM&A Manual / EIA Report for Widening of Tolo Highway/Fanling Highway between Island House Interchange and Fanling
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 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
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) |
SR77 (M1)(1) |
68 |
62.5 ¡V 73.5 |
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; 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 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 |
81.9 mg/L or 120% of upstream control station¡¦s Tby of the same day |
91.9 mg/L or 130% of upstream control station¡¦s Tby of the same day |
Notes:
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 reporting months are presented in Appendix I.
6.7.3 The possible influences in monitoring results were suspected to be the domestic discharges, and possible erosion of silt after rainfall at up-stream locations.
6.7.4 Two (2) exceedances of Limit Level on Turbidity were recorded on 18 and 27 December 2013. One (1) exceedance of Action Level on 6 December 2013 and one (1) exceedance of Limit Level on Suspended Solids on 18 December 2013 were recorded in the reporting month. Investigation for the exceedances had been conducted which concluded that the exceedances event on 6 December 2013 on Suspended Solids and on 27 on Turbidity were not related to the construction works while the exceedance event on 18 December 2013 on both Suspended Solids and Turbidity were considered related to a leakage of the diverted river through the concrete blocks. Necessary remedy actions have been completed and 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 177m3 of excavated material has been generated. 140m3 of inert C&D materials was disposed of at public fill to Tuen Mun Area 38, while 30m3 of inert C&D materials were reused on site. 55kg of general refuse was disposed of at North East New Territories (NENT) Landfill. No paper/cardboard packaging, plastics and metals were collected by recycling contractor in the reporting month. 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 |
26 Nov 2013 |
Observation: A water pump at the box
culvert works area was connected directly to the river. The Contractor should
either remove the pump or connect it to water treatment facility before
discharge. |
The Contractor has removed
the water pump which directly connected to the river as observed by the ET
weekly site inspection on 04 December 2013. |
13 Nov 2013 |
Reminder: The Contractor was reminded
to regularly inspect and maintain the performance of the AquaSed. |
The performance of the
AquaSed was improved as observed during the ET weekly site inspection on 04
December 2013. |
|
4 Dec 2013 |
Observation: The Contractor was advised
to remove the water pump at the box culvert work area connected to the river,
to avoid discharge of untreated water. |
The Contractor has removed
the water pump at the box culvert work area as observed during the ET weekly
site inspection on 11 December 2013. |
|
4 Dec 2013 |
Reminder: The Contractor was reminded
to provide impervious sheeting to cover the stockpile. |
Impervious sheets were provided
to cover the stockpile as observed during the ET site inspection on 18
December 2013. |
|
4 Dec 2013 |
Reminder: The Contractor was reminded
to properly maintain the functioning of the AquaSed. |
The functioning of the
AquaSed was properly maintained as observed during the ET site inspection on
18 December 2013. |
|
18 Dec 2013 |
Observation: Water flow from the upstream
river was spread over the box culvert extension works area. The Contractor
should enhance the performance of water flow diversion. |
No seepage of upstream water
into the works area was observed during the ET¡¦s weekly site inspection on 23
December 2013. The performance of water flow diversion was enhanced. |
|
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 January 2013. |
|
Air Quality |
18 Dec 2013 |
Reminder: The Contractor was reminded
to ensure all vehicles are washed properly at wheel washing facility before
they leave the work site. |
Stop sign in Chinese was
provided in front of the wheel washing facility and workers were trained to
ensure all vehicles are washed properly before they leave the work site as
observed during the ET¡¦s site inspection on 23 December 2013. |
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. |
|
Noise |
N/A |
N/A |
N/A |
Waste / Chemical Management |
26 Nov 2013 |
Observation: An oil drum was observed
without secondary containment. The Contractor should ensure the provision of
drip trays for all chemical/oil containers. |
The Contractor has provided
drip tray for the chemical container as observed during the ET weekly site
inspection on 04 December 2013. |
4 Dec 2013 |
Observation: Chemical for the AquaSed was
observed without secondary containment. The Contractor was advised to provide
drip tray to avoid chemical spillage. |
The Contractor has provided
secondary containments for the chemical containers as observed during the ET
weekly site inspection on 11 December 2013. |
|
Landscape & Visual |
4 Dec 2013 |
Observation: The Contractor was advised
to properly set up tree protection zone to all retained and to be
transplanted tree. |
Tree protection zones were
set up for all retained trees and trees to be transplanted as observed during
the ET site inspection on 18 Dec 2013. |
18 Dec 2013 |
Reminder: The Contractor was reminded
to enlarge the tree protection zone for a tree to be transplanted near the
bore piling works area. |
The tree protection zone for
a tree to be transplanted near the bore piling works area was enlarged as
observed during the ET¡¦s weekly site inspection on 23 December 2013. |
|
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 |
13 December 2013 |
10.1.1 Investigation for the exceedances events on 16, 22 and 28 November 2013 for 24-hour TSP monitoring have been completed. The exceedances were considered not related to the construction works and the respective investigation reports are presented in Appendix L.
10.1.2 Three (3) Action Level exceedances of 24-hour TSP monitoring were recorded on 4, 21 and 27 December 2013 while one (1) Limit Level exceedance was recorded on 10 December 2013 at the monitoring location (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.
10.1.3 All 1-hour TSP results were below the Action and Limit Levels in the reporting month.
10.1.4 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.
10.1.5 Two (2) exceedances of Limit Level on Turbidity were recorded on 18 and 27 December 2013. One (1) exceedance of Action Level on 6 December 2013 and one (1) exceedance of Limit Level on Suspended Solids on 18 December 2013 were recorded in the reporting month. Investigation for the exceedances had been conducted which concluded that the exceedances event on 6 December 2013 on Suspended Solids and on 27 on Turbidity were not related to the construction works while the exceedance event on 18 December 2013 on both Suspended Solids and Turbidity were considered related to a leakage of the diverted river through the concrete blocks. Necessary remedy actions have been completed and 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 Erection of site office;
¡P Cable detection and trial trenches;
¡P Pre-drilling works and piling works;
¡P Tree felling works, waterworks and excavation works;
¡P Dismantling works for abandoned houses;
¡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 Investigation for the exceedances events on 16, 22 and 28 November 2013 for 24-hour TSP monitoring have been completed. The exceedances were considered not related to the construction works and the respective investigation reports are presented in Appendix L.
12.1.4 Three (3) Action Level exceedances of 24-hour TSP monitoring were recorded on 4, 21 and 27 December 2013 while one (1) Limit Level exceedance was recorded on 10 December 2013 at the monitoring location (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.
12.1.5 All 1-hour TSP results were below the Action and Limit Levels in the reporting month.
12.1.6 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.
12.1.7 Two (2) exceedances of Limit Level on Turbidity were recorded on 18 and 27 December 2013. One (1) exceedance of Action Level on 6 December 2013 and one (1) exceedance of Limit Level on Suspended Solids on 18 December 2013 were recorded in the reporting month. Investigation for the exceedances had been conducted which concluded that the exceedances event on 6 December 2013 on Suspended Solids and on 27 on Turbidity were not related to the construction works while the exceedance event on 18 December 2013 on both Suspended Solids and Turbidity were considered related to a leakage of the diverted river through the concrete blocks. Necessary remedy actions have been completed and the investigation reports for the incidents are presented in Appendix L.
12.1.8 Five (5) 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) to avoid earth, mud and debris leaving the works area via storm water drainage;
¡P Properly maintain the water treatment system and also ensure proper treatment of wastewater before discharge;
¡P Avoid waste being accumulated near the water stream; 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.