Certified by Environmental Team Leader
Verified by Independent Environmental Checker
Contract No. HY/2013/04 HZMB HKBCF –
Infrastructure Works Stage II (Southern Portion)
Monthly EM&A Report
for October 2017
November
2017
China State Construction Engineering (Hong Kong) Limited
Mott
MacDonald
20/F
AIA Kowloon Tower
Landmark
East
100
How Ming Street
Kwun
Tong
Kowloon
Hong
Kong
T
+852 2828 5757
F
+852 2827 1823
mottmac.hk
Contents
This Monthly Environmental Monitoring and Audit (EM&A) Report is prepared for Contract No. HY/2013/04 “Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities – Infrastructure Works Stage II (Southern Portion)” (hereafter referred to as “the Contract”) for the Highways Department of Hong Kong Special Administrative Region (HKSAR). The Contract was awarded to China State Construction Engineering (Hong Kong) Limited (hereafter referred to as “the Contractor”) and Mott MacDonald Hong Kong Limited (MMHK) was appointed as the Environmental Team (ET) by the Contractor.
The Contract is part of the “Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities” (HZMB HKBCF) Project which is a “Designated Project” under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap. 499) and for which an EIA Report (Register No. AEIAR-145/2009) was prepared and approved. The current Environmental Permit (EP) for HKBCF, namely No. EP-353/2009/K, was issued on 11 April 2016. These documents are available through the EIA Ordinance Register. Commencement of the Contract took place on 13 March 2015 and the construction works commenced on 13 July 2015.
Mott MacDonald Hong Kong Limited has been appointed by the Contractor to implement the Environmental Monitoring & Audit (EM&A) programme for the Contract in accordance with the Updated EM&A Manual for HKBCF (Version 1.0) and will be providing environmental team services for the Contract.
This is the 28th Monthly EM&A Report for the Contract which summaries findings of the EM&A works during the reporting period from 1 to 31 October 2017 (the “reporting period”).
Environmental Monitoring and Audit Progress
The monthly EM&A programme was undertaken in accordance with the Updated EM&A Manual for HKBCF (Version 1.0). It should be noted that the air quality, noise, water quality and dolphin monitoring works for the Contract are covered by Contract No. HY/2013/01 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Passenger Clearance Building” and Contract No. HY/2011/03 “Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road – Section between Scenic Hill and HKBCF”. The ET of the Contract or another ET of the HZMB project is required to conduct impact air quality monitoring at AMS6 and AMS7, noise monitoring at NMS2 and NMS3B, water quality monitoring at the twenty-one stations and dolphin monitoring works at the twenty-four transects as part of EM&A programme if these monitoring stations are no longer covered under Contract Nos. HY/2013/01 and HY/2011/03. However, this is subject to ENPO’s final decision on which ET should carry out the monitoring work at these stations.
The dates of site inspection during the reporting period are listed below:
● Environmental Site Inspection: 6, 11, 18, 23 and 31 October 2017
Breaches of Action and Limit Levels
Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 shall be referred to the monthly EM&A report prepared by Contract No. HY/2011/03.
There was no Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level recorded at station AMS7 by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
There was no Action and Limit Level exceedance for noise recorded at station NMS2 and station NMS3B by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
A total of 12 Action Level exceedances and 8 Limit Level exceedances (comprising 7 Action Level exceedances and 8 Limit Level exceedances of DO, and 5 Action Level exceedances of SS) were recorded by the Environmental Team of Contract No. HY/2013/01 during the reporting period and were investigated by the ET of the Contract. It was concluded that the exceedances were not due to the Contract.
Impact dolphin monitoring results at all transects during the reporting period are reported in the monthly EM&A Report (for the reporting period) prepared for Contract No. HY/2013/01.
Complaint Log
There was one complaint received in relation to the environmental impact during the reporting period.
Log No. |
Environmental Complaint Ref. No. |
Date of Complaint Receipt |
Description |
005 |
ENPO-C0127 |
27 October 2017 |
Water Quality |
The complaint was about muddy water discharge from HZMB BCF Island works site. According to the complainant, this had continued for one week and occurred at C3 (HY/2013/03) site.
The complaint was investigated by the ET of the Contract and the findings are presented in this report.
Notifications of Summons and Successful Prosecutions
There were no notifications of summons or prosecutions received during this reporting period.
Reporting Changes
There was no reporting change during the reporting period.
Future Key Issues
The future key issues to be undertaken in the upcoming month are:
● Pier column, retaining wall, pump house interior works with E&M works, segment erection, segment delivery (marine-based), excavation with road and drainage works, asphalt paving, outfall works.
On 13 March
2015, Mott MacDonald Hong Kong Limited (MMHK) was commissioned by China State
Construction Engineering (Hong Kong) Limited (also referred to as “the
Contractor”) to undertake the Environmental Team (ET) services (including
environmental monitoring and audit (EM&A)) for Contract No. HY/2013/04 “Hong
Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities –
Infrastructure Works Stage II (Southern Portion)” (“the Contract”) for the Highways
Department of Hong Kong Special Administrative Region (HKSAR).
The Contract is part of the “Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities” (HZMB HKBCF) Project which is a “Designated Project” under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap. 499) and for which an EIA Report (Register No. AEIAR-145/2009) was prepared and approved. The current Environmental Permit (EP) for HKBCF, namely No. EP-353/2009/K, was issued on 11 April 2016. These documents are available through the EIA Ordinance Register. Commencement of the Contract took place on 13 March 2015 and the construction works commenced on 13 July 2015. The works areas of the contract are shown in Appendix A.
This is the 28th Monthly EM&A Report
summarising the findings of
EM&A activities conducted under the Contract from 1 to 31 October 2017 (the
“reporting period”) and is submitted to
fulfil Condition 5.4 of the EP.
The Proposed works
under this Contract comprise the following:
● Construction of vehicular bridge and
at-grade roads at the southern portion of Hong Kong Boundary Crossing
Facilities;
● Construction of associated street lighting,
street furniture, road marking, road signage, box culverts and outfalls,
drainage, sewerage, fresh water and flushing water supply, irrigation,
landscape, electrical and mechanical (E&M), utilities and services works;
● Provisioning of civil engineering works and
power supply for Traffic Control and Surveillance System (TCSS); and
● Other works in accordance with the Contract.
The organisation chart and lines of communication with respect to the on-site environmental management structure together with the contact information of the key personnel are shown in Appendix B. The key personnel contact names and numbers are summarized in Table 1.1.
Table 1.1: Contact Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Engineer or Engineer’s Representative (AECOM Asia Co. Ltd.) |
Chief Resident Engineer |
Alfred Cheng |
3958 7471 |
3468 2076 |
Environmental Project Office / Independent Environmental Checker (Ramboll Environ Hong Kong Limited) |
Environmental Project Office Leader |
Y H Hui |
3465 2888 |
3465 2899 |
Independent Environmental Checker |
Raymond Dai |
3465 2888 |
3465 2899 |
|
|
Environmental Site Supervisor |
Ray Yan |
5181 8165 |
3465 2899 |
Contractor (China State Construction Engineering (Hong Kong) Limited) |
Site Agent |
Jason Chung |
9127 8369 |
2459 4336 |
Environmental Officer |
Xavier Lam |
9493 2944 |
2459 4336 |
|
|
Billy Lao |
6679 1950 |
2459 4336 |
|
Environmental Team (Mott MacDonald Hong Kong Limited) |
Environmental Team Leader |
Gary Chow |
2828 5874 |
2827 1823 |
24-hour Complaint Hotline |
- |
- |
5236 7111 |
- |
The Construction Works Programme of the Project is provided in Appendix C.
A summary of the construction activities undertaken during this reporting period is shown below:
● Box Culvert D: Bay 17 & Bay 18 wall + roof completed
● Box Culvert C: N/A
● Pier Column: 1 no. completed
● Segment Erection: 59 no. competed
● Segment Delivery: 118 pcs
● Depressed Road: Bay 1- Bay 8 based slab completed, Bay 5 wall completed
● No generation of excavated marine sediment
Marine-based outfall works had not commenced during this reporting month.
The air quality and noise monitoring works for the Contract are covered by Contract No. HY/2013/01 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Passenger Clearance Building” and Contract No. HY/2011/03 “Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road – Section between Scenic Hill and HKBCF”. The ET of the Contract or another ET of the HZMB project is required to conduct impact air quality monitoring at AMS6 and AMS7 as part of EM&A programme if these air quality monitoring stations are no longer covered under Contract No. HY/2013/01 and HY/2011/03. Figure 2.1 shows the locations of air monitoring stations.
Table 2.1: Construction Dust Monitoring Locations
Identification No. |
Location Description |
AMS6(1) |
Dragonair/CNAC (Group) Building |
AMS7(1) |
Hong Kong SkyCity Marriot Hotel |
Remarks: (1) The ET of this Contract should conduct impact air quality monitoring at the AMS listed in the table as part of EM&A programme according to latest notification from ENPO when the monitoring station(s) is/are no longer covered by another ET of the HZMB project.
The monitoring requirements, monitoring equipment, monitoring parameters, frequency and duration, monitoring methodology and monitoring schedule are detailed in the monthly EM&A Reports prepared for Contract Nos. HY/2013/01 and HY/2011/03.
The Action and Limit Levels for 1-hr TSP and 24-hr TSP are provided in Table 2.2 and Table 2.3 respectively.
Table 2.2: Action and Limit Levels for 1-hour TSP
Monitoring Station |
Action Level, mg/m3 |
Limit Level, mg/m3 |
AMS6 – Dragonair / SNAC (Group) Building (HKIA) |
360 |
500 |
AMS7 – Hong Kong SkyCity Marriot Hotel |
370 |
500 |
Table 2.3: Action and Limit Levels for 24-hour TSP
Monitoring Station |
Action Level, mg/m3 |
Limit Level, mg/m3 |
AMS6 – Dragonair / SNAC (Group) Building (HKIA) |
173 |
260 |
AMS7 – Hong Kong SkyCity Marriot Hotel |
183 |
260 |
The event and action plan is provided in Appendix D.
If exceedance(s) at these stations is/are recorded by the ET of the Contract or referred by the other ET under the HZMB project to the Contract, the ET of the Contract will carry out an investigation and findings will be reported in the monthly EM&A Report.
The monitoring results for AMS6 and AMS7 are reported in the monthly EM&A Reports prepared for Contract Nos. HY/2011/03 and HY/2013/01 respectively.
Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 shall be referred to the monthly EM&A report prepared by Contract No. HY/2011/03.
There was no Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level recorded at station AMS7 by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
The noise monitoring works for the Contract are covered by Contract No. HY/2013/01 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Passenger Clearance Building”. The ET of the Contract or another ET of the HZMB project is required to conduct noise monitoring at NMS2 and NMS3B as part of EM&A programme if these monitoring stations are no longer covered under Contract No. HY/2013/01. Figure 3.1 shows the locations of noise monitoring stations.
Table 3.1: Construction Noise Monitoring Locations
Identification No. |
Location Description |
NMS2(1) |
Seaview Crescent |
NMS3B(1) (2) |
AECOM PRE’s Office |
Remarks: (1) The ET of this Contract should conduct impact noise monitoring at the NMS listed in the table as part of EM&A programme according to the latest notification from ENPO when the monitoring station(s) is/are no longer covered by another ET of the HZMB project.
(2) The Action and Limit Levels for schools will be applied for this alternative monitoring location.
The monitoring requirements, monitoring equipment, monitoring parameters, frequency and duration, monitoring methodology and monitoring schedule are detailed in the monthly EM&A Reports prepared for Contract No. HY/2013/01.
The Action and Limit Levels for construction noise are defined in Table 3.2.
Table 3.2: Action and Limit Level for Construction Noise
Parameter |
Action Level |
Limit Level |
07:00 – 19:00 hours on normal weekdays |
When one documented complaint is received |
75 dB(A)* |
Notes: If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the Noise Control Authority have to be followed.
* Reduce to 70 dB(A) for schools and 65 dB(A) during school examination period.
The monitoring results for NMS2 and NMS3B are reported in the monthly EM&A Reports prepared for Contract No. HY/2013/01. No noise exceedances were recorded at stations NMS2 and NMS3B by the ET of Contract No. HY/2013/01 during the reporting period.
The water quality monitoring works for the Contract are covered by Contract No. HY/2013/01 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Passenger Clearance Building”. A total of twenty-one stations (nine Impact Stations, seven Sensitive Receiver Stations and five Control/Far Field Stations) are covered by the current EM&A programme. The ET of the Contract or another ET of the HZMB project is required to conduct water quality monitoring at these stations as part of EM&A programme if these monitoring stations are no longer covered under Contract No. HY/2013/01. Table 4.1 and Figure 4.1 shows the locations of water quality monitoring stations.
Table 4.1: Impact Water Quality Monitoring Stations
Station |
Description |
East |
North |
IS5 |
Impact Station (Close to HKBCF construction site) |
811579 |
817106 |
IS(Mf)6 |
Impact Station (Close to HKBCF construction site) |
812101 |
817873 |
IS7 |
Impact Station (Close to HKBCF construction site) |
812244 |
818777 |
IS8 |
Impact Station (Close to HKBCF construction site) |
814251 |
818412 |
IS(Mf)9 |
Impact Station (Close to HKBCF construction site) |
813273 |
818850 |
IS10(N) |
Impact Station (Close to HKBCF construction site) |
812942 |
820881 |
IS(Mf)11 |
Impact Station (Close to HKBCF construction site) |
813562 |
820716 |
IS(Mf)16 |
Impact Station (Close to HKBCF construction site) |
814328 |
819497 |
IS17 |
Impact Station (Close to HKBCF construction site) |
814539 |
820391 |
SR3 |
Sensitive receivers (San Tau SSSI) |
810525 |
816456 |
SR4(N) |
Sensitive receivers (Tai Ho) |
814705 |
817859 |
SR5(N) |
Sensitive receivers (Artificial Reef in NE Airport) |
812569 |
821475 |
SR6 |
Sensitive receivers (Sha Chau and Lung Kwu Chau Marine Park) |
805837 |
821818 |
SR7 |
Sensitive receivers (Tai Mo Do) |
814293 |
821431 |
SR10A |
Sensitive receivers (Ma Wan FCZ) 1 |
823741 |
823495 |
SR10B(N) |
Sensitive receivers (Ma Wan FCZ) 2 |
823683 |
823187 |
CS(Mf)3(N) |
Control Station |
808814 |
822355 |
CS(Mf)5 |
Control Station |
817990 |
821129 |
CS4 |
Control Station |
810025 |
824004 |
CS6 |
Control Station |
817028 |
823992 |
The monitoring requirements, monitoring equipment, monitoring parameters, frequency and duration, monitoring methodology, monitoring schedule, meteorological information are detailed in the monthly EM&A Reports prepared for Contract No. HY/2013/01.
The Action and Limit Levels for water quality are provided in Table 4.2.
Table 4.2: Action and Limit Levels for Water Quality
Parameters |
Action |
Limit |
DO in mg L-1 (Surface, Middle & Bottom) |
Surface and Middle |
|
SS in mg L-1 (depth-averaged)
at all monitoring stations and control stations |
23.5 and 120% of upstream control station's SS at the same tide of the
same day* |
34.4 and 130% of upstream control station's SS at the same tide of the
same day and 10mg/L for WSD Seawater intakes* |
27.5 and 120% of upstream control station's turbidity at the same tide
of the same day* |
47.0 and 130% of upstream control station's |
Remarks:
* Reference is made to EPD approval of adjustment of water quality assessment criteria issued and became effective on 18 February 2013.
Notes:
1. “depth-averaged” is calculated by taking the arithmetic means of reading of all three depths.
2. For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits.
3.
For turbidity, SS,
non-compliance of the water quality limits occurs when monitoring result is
higher than the limits.
4.
All the figures
given in the table are used for reference only and the EPD may amend the
figures whenever it is considered as necessary.
5.
The 1%-ile of
baseline data for dissolved oxygen (surface and middle) and dissolved oxygen
(bottom) are 4.2 mg/L and 3.6 mg/L respectively.
If exceedance(s) at these stations is/are recorded by the ET of the Contract or referred by the other ET under the HZMB project to the Contract, the ET of the Contract will carry out an investigation and findings will be reported in the monthly EM&A Report.
The monitoring results for the twenty-one monitoring stations are reported in the monthly EM&A Reports prepared for Contract No. HY/2013/01.
A total of 12 Action Level exceedances and 8 Limit Level exceedances (comprising 7 Action Level exceedances and 8 Limit Level exceedances of DO, and 5 Action Level exceedances of SS) were recorded by the Environmental Team of Contract No. HY/2013/01 during the reporting period and were investigated by the ET of the Contract.
Water quality exceedances recorded during the reporting period are summarised in Table 4.3.
Table 4.3: Action and Limit Level Exceedance for Water Quality
Date |
Parameter (Units) |
Station |
Depth |
Exceedance Recorded during Mid-ebb Tide |
Exceedance Recorded during Mid-flood Tide |
2 Oct 2017 |
DO |
SR10A |
Bottom |
Action
Level |
Action
Level |
|
|
SR10B(N) |
Surface
and Middle |
- |
Limit
Level |
|
|
SR10B(N) |
Bottom |
- |
Action
Level |
4 Oct 2017 |
DO |
SR10A |
Surface
and Middle |
Limit
Level |
Limit
Level |
|
|
SR10A |
Bottom |
Action
Level |
Action
Level |
|
|
SR10B(N) |
Surface
and Middle |
Limit
Level |
Limit
Level |
|
|
SR10B(N) |
Bottom |
- |
Action
Level |
6 Oct 2017 |
DO |
SR10B(N) |
Surface
and Middle |
Limit
Level |
Limit
Level |
|
|
SR10B(N) |
Bottom |
- |
Action
Level |
9 Oct 2017 |
DO |
SR10B(N) |
Surface
and Middle |
- |
Limit
Level |
18 Oct 2017 |
SS |
SR5(N) |
Depth
Average |
- |
Action
Level |
20 Oct 2017 |
SS |
IS(Mf)11 |
Depth
Average |
- |
Action
Level |
|
|
SR5(N) |
Depth
Average |
- |
Action
Level |
|
|
SR7 |
Depth
Average |
- |
Action
Level |
23 Oct 2017 |
SS |
SR5(N) |
Depth
Average |
- |
Action
Level |
The details of water quality exceedances can be referred to in the Monthly EM&A report under Contract No. HY/2013/01.
Investigations into these exceedances were conducted and the findings are summarised below.
2 October 2017
According to the Contractor of HY/2013/04, no marine-based
works and no marine-based transportation were conducted under the contract on 2
October 2017. Furthermore, no discharge originating from any HY/2013/04 site
works on 2 October 2017 was identified.
During ET’s regular weekly site inspections on 27 September
and 6 October 2017, HY/2013/04 site shoreline interfacing with open waters was
inspected and there were no observations referring to water quality mitigation
measures associated with that shoreline.
Also, the exceedance locations, i.e. SR10A and SR10B(N),
were located well away from the HY/2013/04 site.
It was concluded that the exceedances were not due to HY/2013/04.
4 October 2017
According to the Contractor of HY/2013/04, no marine-based works and no marine-based transportation were conducted under the contract on 4 October 2017. Furthermore, no discharge originating from any HY/2013/04 site works on 4 October 2017 was identified.
During ET’s regular weekly site inspections on 27 September and 6 October 2017, HY/2013/04 site shoreline interfacing with open waters was inspected and there were no observations referring to water quality mitigation measures associated with that shoreline.
Also, the exceedance locations, i.e. SR10A and SR10B(N), were located well away from the HY/2013/04 site.
It was concluded that the exceedances were not due to HY/2013/04.
6 October 2017
According to the Contractor of HY/2013/04, no marine-based works and no marine-based transportation were conducted under the contract on 6 October 2017. Furthermore, no discharge originating from any HY/2013/04 site works on 6 October 2017 was identified.
During ET’s regular weekly site inspection on 6 October 2017, HY/2013/04 site shoreline interfacing with open waters was inspected and there were no observations referring to water quality mitigation measures associated with that shoreline.
Also, the exceedance location, i.e. SR10B(N), was located well away from the HY/2013/04 site.
It was concluded that the exceedances were not due to HY/2013/04.
9 October 2017
According to the Contractor of HY/2013/04, no marine-based works were conducted under the contract on 9 October 2017. Furthermore, no discharge originating from any HY/2013/04 site works on 9 October 2017 was identified.
Marine-based segment delivery was conducted on the evening of 8 October 2017 to the early morning of 9 October 2017, with the barge vessel arriving at HY/2013/04 loading/unloading point at 01:35 (a.m.) on 9 October 2017 (attached vessel tracking record refers). No other marine transportation was conducted under the contract on 9 October 2017.
Given that the sampling time at SR10B(N) where exceedance was recorded was at least several hours after the abovementioned segment delivery, it is considered unlikely that the exceedance recorded could be attributed to this activity. Also, SR10B(N) was located well away from the segment delivery route.
According to the Contractor, after finishing the unloading operation, the vessel for segment delivery departed from the loading/unloading point at 16:00 on the same day. Since samplings showing exceedances were obtained before this time, it is unlikely that they could be attributed to this activity.
During ET’s regular weekly site inspections on 6 and 11 October 2017, HY/2013/04 site shoreline interfacing with open waters was inspected and there were no observations referring to water quality mitigation measures associated with that shoreline.
It was concluded that the exceedance was not due to HY/2013/04.
18 October 2017
According to the Contractor of HY/2013/04, no marine-based
works and no marine-based transportation were conducted under the contract on
18 October 2017. Furthermore, no discharge originating from any HY/2013/04 site
works on 18 October 2017 was identified.
During ET’s regular weekly site inspection on 18 October
2017, HY/2013/04 site shoreline interfacing with open waters was inspected and
there were no observations referring to water quality mitigation measures
associated with that shoreline.
It was concluded that the exceedance was not due to
HY/2013/04.
20 October 2017
According to the Contractor of HY/2013/04, no marine-based works were conducted under the contract on 20 October 2017. Furthermore, no discharge originating from any HY/2013/04 site works on 20 October was identified.
Marine-based segment delivery was conducted on the evening of 19 October 2017 to the early morning of 20 October 2017, with the barge vessel arriving at HY/2013/04 loading/unloading point at 01:34 (a.m.) on 20 October 2017 (attached vessel tracking record refers). No other marine transportation was conducted under the contract on 20 October 2017.
Given that the sampling times where exceedances were recorded were at least several hours after the abovementioned segment delivery, it is considered unlikely that the exceedances recorded could be attributed to this activity.
According to the Contractor, after finishing the unloading operation, the vessel for segment delivery departed from the loading/unloading point at 16:00 on the same day. Since samplings showing exceedances were obtained before this time, it is unlikely that they could be attributed to this activity.
While SS exceedance was recorded at IS(Mf)11, SR5(N) and SR7, no exceedance was recorded at IS(Mf)9 which is the nearest monitoring location to HY/2013/04 loading and unloading point and the shoreline interfacing with open waters.
During ET’s regular weekly site inspections on 18 and 23 October 2017, HY/2013/04 site shoreline interfacing with open waters was inspected. On 18 October 2017, no observations referring to water quality mitigation measures associated with that shoreline were made. During the inspection on 23 October 2017 at 14:40, a water quality observation regarding a silt curtain associated with that shoreline was made and the following day the Contractor deployed a diver to inspect the silt curtain and confirm its structural integrity, however it was located well away from SR5(N) and therefore unrelated to the recorded exceedance.
No further exceedance was reported in the next monitoring event on 23 October 2017 at IS(Mf)9, i.e. the WQM station closest to HY/2013/04 loading and unloading point and the shoreline interfacing with open waters.
It was concluded that the exceedance was not due to HY/2013/04.
23 October 2017
According to the Contractor of HY/2013/04, no marine-based works were conducted under the contract on 23 October 2017. Furthermore, no discharge originating from any HY/2013/04 site works on 23 October 2017 was identified.
Marine-based segment delivery was conducted on the evening of 22 October 2017 to the early morning of 23 October 2017, with the barge vessel arriving at HY/2013/04 loading/unloading point at 01:33 (a.m.) on 23 October 2017 (attached vessel tracking record refers). No other marine transportation was conducted under the contract on 23 October 2017.
Given that the sampling time at SR5(N) where exceedance was recorded was at least several hours after the abovementioned segment delivery, it is considered unlikely that the exceedance recorded could be attributed to this activity.
According to the Contractor, after finishing the unloading operation, the vessel for segment delivery departed from the loading/unloading point at 16:00 on the same day. Since samplings showing exceedances were obtained before this time, it is unlikely that they could be attributed to this activity.
While SS exceedance was recorded at SR5(N), no exceedance was recorded at IS(Mf)9 which is the nearest monitoring location to HY/2013/04 loading and unloading point and the shoreline interfacing with open waters.
During ET’s regular weekly site inspection on 23 October 2017, HY/2013/04 site shoreline interfacing with open waters was inspected. A water quality observation regarding a silt curtain associated with that shoreline was made at 14:40 during that inspection and the following day the Contractor deployed a diver to inspect the silt curtain and confirm its structural integrity, however it was located well away from SR5(N) and therefore unrelated to the recorded exceedance.
No further exceedance was reported in the next monitoring event on 25 October 2017 at IS(Mf)9, i.e. the WQM station closest to HY/2013/04 loading and unloading point and the shoreline interfacing with open waters.
It was concluded that the exceedance was not due to HY/2013/04.
The dolphin monitoring works for the Contract are covered by Contract No. HY/2013/01 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Passenger Clearance Building”. The ET of the Contract or another ET of the HZMB project is required to conduct dolphin monitoring at the twenty-four transects as part of EM&A programme if these transects are no longer covered under Contract No. HY/2013/01. The dolphin monitoring should adopt line-transect vessel survey method. The survey follows pre-set and fixed transect lines in the two areas defined by AFCD as: Northeast Lantau survey area; and Northwest Lantau survey area.
Table 5.1 shows the co-ordinates for the transect lines and layout map.
The revised layout map showing the transect lines have been provided by AFCD and are shown in Figure 5.1.
Table 5.1: Impact Dolphin Monitoring Line Transect Co-ordinates (Provided by AFCD)
Transect |
HK
Grid System |
Long
Lat in WGS84 |
||
|
X |
Y |
Long |
Lat |
1# |
804671 |
815456 |
113.870287 |
22.277678 |
|
804671 |
831404 |
113.869975 |
22.421696 |
2#^ |
805476 |
820800 |
113.877995 |
22.325951 |
|
805476 |
826654 |
113.877882 |
22.378815 |
3^ |
806464 |
821150 |
114.030267 |
22.196697 |
|
806464 |
822911 |
114.047344 |
22.196712 |
4^ |
807518 |
821500 |
114.033651 |
22.206219 |
|
807518 |
829230 |
114.108618 |
22.206267 |
5^ |
808504 |
821850 |
114.037037 |
22.215126 |
|
808504 |
828602 |
114.102523 |
22.215169 |
6^ |
809490 |
822150 |
114.039938 |
22.224033 |
|
809490 |
825352 |
114.070995 |
22.224056 |
7#^ |
810499 |
822000 |
114.038474 |
22.233143 |
|
810499 |
824613 |
114.063820 |
22.233163 |
8# |
811508 |
821123 |
113.936539 |
22.328966 |
|
811508 |
824254 |
113.936486 |
22.357241 |
9# |
812516 |
821303 |
113.946320 |
22.330606 |
|
812516 |
824254 |
113.946279 |
22.357255 |
10* |
813525 |
820827 |
113.956112 |
22.326321 |
|
813525 |
824657 |
113.956066 |
22.360908 |
11# |
814556 |
818853 |
113.966155 |
22.304858 |
|
814556 |
820992 |
113.966125 |
22.327820 |
12 |
815542 |
818807 |
113.975726 |
22.308109 |
|
815542 |
824882 |
113.975647 |
22.362962 |
13 |
816506 |
819480 |
113.985072 |
22.314192 |
|
816506 |
824859 |
113.985005 |
22.362771 |
14 |
817537 |
820220 |
113.995070 |
22.320883 |
|
817537 |
824613 |
113.995018 |
22.360556 |
15 |
818568 |
820735 |
114.005071 |
22.325550 |
|
818568 |
824433 |
114.005030 |
22.358947 |
16 |
819532 |
821420 |
114.014420 |
22.331747 |
|
819532 |
824209 |
114.014390 |
22.356933 |
17 |
820451 |
822125 |
114.023333 |
22.338117 |
|
820451 |
823671 |
114.023317 |
22.352084 |
18 |
821504 |
822371 |
114.033556 |
22.340353 |
|
821504 |
823761 |
114.033544 |
22.352903 |
19 |
822513 |
823268 |
114.043340 |
22.348458 |
|
822513 |
824321 |
114.043331 |
22.357971 |
20 |
823477 |
823402 |
114.052695 |
22.349680 |
|
823477 |
824613 |
114.052686 |
22.360610 |
21 |
805476 |
827081 |
113.877878 |
22.382668 |
|
805476 |
830562 |
113.877811 |
22.414103 |
22 |
806464 |
824033 |
113.887520 |
22.355164 |
|
806464 |
829598 |
113.887416 |
22.405423 |
23 |
814559 |
821739 |
113.966142 |
22.334574 |
|
814559 |
824768 |
113.966101 |
22.361920 |
24^ |
805476 |
815900 |
113.979368 |
22.187721 |
|
805476 |
819100 |
114.010398 |
22.187756 |
Remarks:
(a) * Due to the presence of deployed silt curtain systems at the site boundaries of the Contract, some of the transect lines shown in Figure 5.1 could not be fully surveyed during the regular survey. Transect 10 is reduced from 6.4km to approximately 3.6km in length due to the HKBCF construction site. Therefore the total transect length for both NEL and NWL combined is reduced to approximately 108km.
(b) # Coordinates for transect lines 1, 2, 7, 8, 9 and 11 have been updated in respect to the Proposal for Alteration of Transect Line for Dolphin Monitoring approved by EPD on 19 August 2015.
(c) ^ The change of transect lines 2, 3, 4, 5, 6 and 7 and new transect line 24 were justified and verified by the ET Leader for Contract No. HY/2010/02 and the IEC respectively on 24 March 2017 and it was approved by EPD on 12 May 2017.
The monitoring requirements, monitoring equipment, monitoring parameters, frequency and duration, monitoring methodology, monitoring schedule, meteorological information are detailed in the monthly EM&A Reports prepared for Contract No. HY/2013/01.
The Action and Limit Levels for Chinese White Dolphin Monitoring are provided in Table 5.2 and Table 5.3, respectively.
Table 5.2: Action and Limit Levels for Chinese White Dolphin Monitoring - Approach to Define Action Level (AL) and Limit Level (LL)
Table 5.3: Derived Value of Action Level (AL) and Limit Level (LL) for Chinese White Dolphin Monitoring
|
North Lantau Social Cluster |
|
|
NEL |
NWL |
Action Level |
(STG <
4.2) & (ANI < 15.5) |
(STG <
6.9) & (ANI < 31.3) |
Limit Level |
[(STG <
2.4) & (ANI <8.9)] AND [ (STG < 3.9) & (ANI < 17.9)] |
The event and action plan is provided in Appendix D.
If exceedance(s) at these survey transect(s) is/are recorded by the ET of the Contract or referred by the other ET under the HZMB project to the Contract, the ET of the Contract will carry out an investigation and findings will be reported in the monthly EM&A Report.
The monitoring results for dolphin monitoring during the reporting period are reported in the monthly EM&A Report (for the reporting period) prepared for Contract No. HY/2013/01.
Site Inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control mitigation measures for the project. During the reporting period, site inspections were carried out on 6, 11, 18, 23 and 31 October 2017.
Particular observations during the site inspections and corrective actions undertaken by the Contractor are described below.
a. The colour of a NRMM label for crawler crane at Bridge D8 had faded. Subsequently, the crawler crane was removed from site. The observation was closed on 11 October 2017.
27 September 2017
a. Loose general refuse was observed at P910. Subsequently, the general refuse was cleared. The observation was closed on 6 October 2017.
6 October 2017
a. Loose general refuse was observed near the bridge at P802. Subsequently, the general refuse was cleared. The observation was closed on 18 October 2017.
11 October 2017
a. Site housekeeping near Bridge D1 at P101 was untidy with unsorted construction materials and general refuse observed. Subsequently, the site housekeeping was improved with general refuse and construction materials cleared. The observation was closed on 18 October 2017.
b. Dusty access road between main haul road and P101 was observed. Subsequently, the access road was provided with water spray. The observation was closed on 18 October 2017.
18 October 2017
a. The colour of a NRMM label for generator near Retaining Wall RW1a had faded. Subsequently, a new NRMM label was provided for the generator near RW1a. The observation was closed on 23 October 2017.
b. Stagnant water pond near Bridge D14a at P1406 was observed. Subsequently, the stagnant water pond was cleared. The observation was closed on 23 October 2017.
23 October 2017
a. A few haul roads were observed to be slightly dry. Subsequently, more frequent water spray was provided for the haul roads. The observation was closed on 31 October 2017.
b. Some C&D waste stockpiles were observed on the deck of Bridge D8/D9a. Subsequently, the C&D waste was removed. The observation was closed on 31 October 2017.
c. Silty water was observed immediately outside the perimeter of a silt curtain for Box Culvert D. Subsequently, the Contractor inspected the silt curtain for Box Culvert D and confirmed that it was structurally intact. No silty water was observed outside the silt curtain during the follow-up inspection on 31 October 2017. The observation was closed on 31 October 2017.
31 October 2017
a. Loose general refuse and construction materials were observed at A801 (Bridge D8) and P910 (Bridge D9c). The Contractor was reminded to improve the housekeeping at these locations (including sorting and disposal). Follow-up actions for the outstanding observation will be inspected during the upcoming site inspections and reported in the coming reporting period.
The Contractor registered as a chemical waste producer for the Contract. Sufficient numbers of receptacles were available for general refuse collection and sorting. As a practical means, the disposal operation is managed by a single HKBCF contractor who is also responsible for applying dumping permit and its subsequent extension applications from EPD. Contract No. HY/2013/03 has been assigned to coordinate and arrange for disposal of extracted marine sediment from this Contract.
There was no generation of excavated sediment for treatment during this reporting period. Any treatment of excavated marine sediment will be conducted using cement solidification/ stabilization (Cement S/S) techniques and the treated sediment will be reused onsite for either backfilling or landscaping (e.g. berm material).
The monthly summary of waste flow table is detailed in Appendix E.
The Contractor was reminded that chemical waste containers should be properly treated and stored temporarily in designated chemical waste storage area on site in accordance with the Code of Practice on the Packing, Labelling and Storage of Chemical Waste.
After the acceptance of the review of the approved Sediment Quality Report (SQR) for this Project under EPD letter dated 19 August 2015, an approval to dispose the marine sediment extracted from bored piling for this Project was then approved under memo from Secretary, Marine Fill Committee of CEDD dated 20 August 2015 for the disposal of marine sediment extracted from bored piling works. The disposal sites allocated to this Project are the Mud Pit CMP2 of the Confined Marine Sediment Disposal Facility to the South of The Brothers (or at the East of Sha Chau). As advised by CEDD in the memo dated 19 February 2016, from 00:00 on 22 March 2016 onward, the disposal space at CMP2 of the South of The Brothers is closed and all disposal of contaminated sediment is to be carried out at CMP Vd to the East of Sha Chau (ESC).
As Contract No. HY/2013/01 has commenced treatment of the extracted marine sediment, treatment will continue and the treated marine sediment will be re-used within the HKBCF Island. On the other hand, Contract Nos. HY/2013/02, HY/2013/03 and HY/2013/04 have not commenced the treatment of extracted marine sediment. Therefore the marine sediment extracted from these three Contracts will be disposed to the allocated disposal sites directly without treatment. As a practical means, the disposal operation is managed by one contractor who is also responsible for applying dumping permit and its subsequent extension applications from EPD. Contract No. HY/2013/03 has been assigned to coordinate and arrange for disposal of extracted marine sediment from all three Contracts.
The SQR was further reviewed in mid-2016. EPD has no comment to extend the validity of the SQR to August 2017 under letter dated 18 August 2016.
Based on the actual piling operation, the estimated quantity of marine sediment to be extracted has been revised from 85,000 m3 to 126,000 m3 (bulk volume). EPD has no comments on the request as in the letter dated 20 October 2016. The Secretary of Marine Fill Committee, CEDD approved the increasing quantity in the memo dated 10 November 2016.
During the course of reviewing the SQR, it was noted that the contamination level of the marine sediment extracted from the inner part of the HKBCF Island was not identified during the previous sampling and testing. As requested by EPD, sampling and testing are required. The Sediment Sampling and Testing Proposal (SSTP) for the inner area of the HKBCF Island was approved by EPD on 2 June 2016.
As in the agreed SSTP for the inner area of the HKBCF Island, samples were taken from the seventeen batches of stockpiled marine sediments and from five boreholes each in one of the five sampling grids. After conducting chemical tests on samples, six batches of stockpiled samples under Contract No. HY/2013/03 and all eight batches of stockpiled samples under Contract No. HY/20013/04 are classified as Category L sediment. The Secretary of Marine Fill Committee of CEDD allocated disposal sites under memo dated 24 October 2016 and dated 22 November 2016 for disposal of a total of 9,500 m3 in-situ volume of Category L sediment (using a bulk factor of 1.3). The Category L sediment was disposed in December 2016.
One sample from the batch of stockpiled marine sediment under Contract No. HY/2013/03 and samples from all five sampling grids had contamination levels exceeding the Lower Chemical Exceedance Levels (LCEL) and biological screenings were carried out. All samples passed the biological screenings and are classified as Category Mp sediment and to be disposed off site using Type II confined marine disposal method the same method used for marine sediment extracted from other part of the HKBCF Island.
The barge for disposal of marine sediment will morn at the temporary loading and unloading at the east shore of the HKBCF Island, which has been being used by reclamation contractor (Contract No. HY/2010/02) for reclamation activities. In terms of safety consideration, each dumping date will be allocated to one Contract. The quantity of marine sediment disposed on the date is from one Contract.
During dumping, each Contractor is responsible for transporting the marine sediment from his site area to the barge. The estimated quantity of marine sediment in each truck is confirmed by Resident Site Staff of each Contract. The trip tickets for transportation and disposal of marine sediment are collected and checked. Contract No. HY/2013/03 as the dumping permit holder is responsible for reporting to EPD the quantity disposed of as the condition stipulated in the dumping permit.
AECOM has confirmed that the disposal of excavated marine sediments to allocated dumping site via Contract No. HY/2013/03 has been completed with the last batch disposal on 30 August 2017. The total quantities disposed are presented in the following table (Table 6.1):
Table 6.1: Summary of Marine Sediment disposed to Dumping Site via Contract No. HY/2013/03
|
Type
of Sediment and Quantity Disposed (m3) |
|
|
Cat. L (in
Type I) |
Type II |
Total |
3,570 |
39,814 |
Note: For monthly breakdown of these quantities, please refer to the waste flow table in Appendix E.
The valid environmental licenses and permits during the reporting period are summarized in Appendix F.
In response to the site audit findings, the Contractor carried out corrective actions.
A summary of the Implementation Schedule of Environmental Mitigation Measures (EMIS) is presented in Appendix G. Most of the necessary mitigation measures were implemented properly.
Implementation status of the Regular Marine Travel Route Plan (RMTRP) was checked by ET. Training of marine travel route for marine vessel operator was given to relevant staff and relevant records were kept properly. The marine traffic records and geographical plots of all the vessel tracks to demonstrate the conformance of the vessel to the proposed route in October 2017 would be provided to ER, ETL and IEC/ENPO for checking within the month of November 2017.
Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 shall be referred to the monthly EM&A report prepared by Contract No. HY/2011/03.
There was no Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level recorded at station AMS7 by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
There was no Action and Limit Level exceedance for noise recorded at station NMS2 and station NMS3B by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
Water quality monitoring exceedances were recorded by the ET of Contract No. HY/2013/01 during the reporting period. The investigation findings are presented in Section 4.3 of this report.
Impact dolphin monitoring results at all transects during the reporting period are reported in the monthly EM&A Report (for the reporting period) prepared for Contract No. HY/2013/01.
Complaints
There was one complaint received in relation to the environmental impact during the reporting period. The summary of environmental complaints is presented in Table 6.2. The details of cumulative statistics of Environmental Complaints are provided in Appendix H.
Table 6.2: Summary of Environmental Complaints for the Reporting Month
Log No. |
Environmental Complaint Ref. No. |
Date of Complaint Receipt |
Description |
005 |
ENPO-C0127 |
27 October 2017 |
Water Quality |
The complaint was about muddy water discharge from HZMB BCF Island works site. According to the complainant, this had continued for one week and occurred at C3 (HY/2013/03) site.
The complaint was investigated by the ET of the Contract.
As informed by the Contractor of HY/2013/04, there was no ongoing discharge of wastewater from the HY/2013/04 site during the period described in the complaint.
The Contractor has obtained a discharge licence under the WPCO for treatment and disposal of wastewater (Licence No. WT00028782-2017). The discharge licence and most recently-received results for monthly sampling under the licence were included in ET’s investigation report.
During ET’s regular weekly site inspection on 23 October 2017, HY/2013/04 site shoreline interfacing with open waters was inspected. Land-based works at the shoreline for Box Culverts C and D were in progress. Bunds were provided near the shoreline to contain potential site runoff. No surface runoff was observed near the shoreline. Wastewater treatment facilities were provided near Box Culverts C and D to treat site runoff before discharge from the contract site. No discharge was observed at the discharge points or along the same shoreline interfacing with open waters. Silt curtain was provided at each box culvert for marine work areas. Photos of these mitigation measures were included in ET’s investigation report. A location plan showing the discharge points was also included in ET’s investigation report.
During the abovementioned site inspection, silty water was observed immediately outside the perimeter of a silt curtain for Box Culvert D, and the Contractor was reminded to inspect the silt curtain to ensure that its structural integrity is intact. Subsequently, the Contractor inspected the silt curtain to confirm its structural integrity and no silty water outside the silt curtain was observed. There were no other observations referring to water quality mitigation measures associated with that shoreline.
The Contractor is reminded to observe all conditions stated in the relevant discharge licence and implement all necessary water quality mitigation measures identified in the EM&A Manual.
The ET’s investigation report for the abovementioned complaint is presented in Appendix J.
Notification of Summons and Successful Prosecution
No notification of summons or prosecutions was received during the reporting period.
Statistics on notifications of summons and successful prosecutions are summarized in Appendix H.
As informed by the Contractor, the major construction activities for November 2017 are summarized in Table 7.1.
Table 7.1: Construction Activities for November 2017
Site Area |
Description of Activities |
HKBCF |
●
Pier column, retaining wall, pump house interior
works with E&M works, segment erection, segment delivery (marine-based),
excavation with road and drainage works, asphalt paving, outfall works. |
The tentative schedule for weekly site inspections for November 2017 is provided in Appendix I.
Commencement of the Contract took place on 13 March 2015 and the construction works of the Contract commenced on 13 July 2015.
Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 shall be referred to the monthly EM&A report prepared by Contract No. HY/2011/03.
There was no Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level recorded at station AMS7 by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
There was no Action and Limit Level exceedance for noise recorded at station NMS2 and station NMS3B by the Environmental Team of Contract No. HY/2013/01 during the reporting period.
A total of 12 Action Level exceedances and 8 Limit Level exceedances (comprising 7 Action Level exceedances and 8 Limit Level exceedances of DO, and 5 Action Level exceedances of SS) were recorded by the Environmental Team of Contract No. HY/2013/01 during the reporting period and were investigated by the ET of the Contract. It was concluded that the exceedances were not due to the Contract.
Impact dolphin monitoring results at all transects during the reporting period are reported in the monthly EM&A Report (for the reporting period) prepared for Contract No. HY/2013/01.
Environmental site inspections were carried out on 6, 11, 18, 23 and 31 October 2017. Recommendations on remedial actions were given to the Contractor for the deficiencies identified during the site inspections.
There was one complaint received in relation to the environmental impact during the reporting period. The complaint was investigated by the ET of the Contract. The Contractor is reminded to observe all conditions stated in the relevant discharge licence and implement all necessary water quality mitigation measures identified in the EM&A Manual.
There were no notifications of summons or prosecutions received during the reporting period.
Appendix A. Location of Works Areas
Appendix B. Project Organization for Environmental Works
Appendix C. Construction Programme
Appendix D. Event and Action Plan
Appendix E. Waste Flow Table
Appendix F. Environmental Licences and Permits
Appendix G. Implementation Schedule for Environmental Mitigation Measures (EMIS)
Appendix H. Statistics on Environmental Complaints, Notification of Summons and Successful Prosecutions
Appendix I. Environmental Site Inspection Schedule
Appendix J. Complaint Investigation Report