Certified by Environmental Team Leader
Verified by Independent Environmental Checker
Contract No. HY/2013/04 HZMB HKBCF –
Infrastructure Works Stage II (Southern Portion)
Quarterly EM&A Report
for April 2017 to June 2017
July
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 Quarterly 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 8th Quarterly EM&A Report for the Contract which summaries findings of the EM&A works during the reporting period from 1 April 2017 to 30 June 2017 (the “reporting period”).
Environmental Monitoring and Audit Progress
The 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 and noise monitoring works for the Contract are covered by Contract No. HY/2010/02 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Reclamation Works” 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 and noise monitoring at NMS2 and NMS3B as part of EM&A programme if these monitoring stations are no longer covered under Contract Nos. HY/2010/02 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:
● 5, 12, 19 and 26 April, 4, 10, 17, 22 and 31 May and 7, 14, 19 and 28 June 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 is reported in 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/2010/02 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/2010/02 during the reporting period.
One Action Level exceedance of SS was recorded by the Environmental Team of Contract No. HY/2010/02 during the reporting period. After investigation, it was concluded that the exceedance was not related to Contract No. HY/2013/04.
Impact dolphin monitoring results at all transects during the reporting period are reported in the monthly EM&A Reports (for April, May and June 2017) prepared for Contract No. HY/2010/02.
Complaint Log
There were no complaints received in relation to the environmental impact during the reporting period.
Notifications of Summons and Successful Prosecutions
There were no notifications of summons or prosecutions received during this reporting period.
Reporting Changes
On 15 May 2017, IEC/ENPO notified ET of changes to the EM&A Programme regarding some water quality monitoring stations and vessel-based transect lines for dolphin monitoring being conducted by Contract No. HY/2010/02. These changes were certified by the ETL of Contract No. HY/2010/02 and verified by the IEC on 24 March 2017, and approved by EPD on 12 May 2017. The changes are summarised in Table ES.1 and Table ES.2 below.
Table ES.1: Changes to Impact Water Quality Monitoring Stations (with effect from 15 May 2017)
Station |
Description |
East |
North |
IS10* |
Impact Station (Close to HKBCF construction site) |
812577 |
820670 |
IS10(N)# |
Impact
Station (Close to HKBCF construction site) |
812942 |
820881 |
SR5* |
Sensitive receivers (Artificial Reef in NE Airport) |
811489 |
820455 |
SR5(N)# |
Sensitive
receivers (Artificial Reef in NE Airport) |
812569 |
821475 |
CS(Mf)3* |
Control Station |
809989 |
821117 |
CS(Mf)3(N)# |
Control
Station |
808814 |
822355 |
Remark: Three monitoring stations, namely IS10, SR5 and CS(Mf)3 (marked *), were replaced by IS10(N), SR5(N) and CS(Mf)3(N) respectively (marked #, shown in bold red font).
Table ES.2: New Coordinates of Vessel-based Transect Lines (with effect from 15 May 2017)
Transect |
HK
Grid System |
|
|
X |
Y |
2 |
805476 |
820800 |
|
805476 |
826654 |
3 |
806464 |
821150 |
|
806464 |
822911 |
4 |
807518 |
821500 |
|
807518 |
829230 |
5 |
808504 |
821850 |
|
808504 |
828602 |
6 |
809490 |
822150 |
|
809490 |
825352 |
7 |
810499 |
822000 |
|
810499 |
824613 |
24 |
805476 |
815900 |
|
805476 |
819100 |
Remark: New coordinates shown in bold red font.
This Quarterly 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. The works areas of the contract are shown in Appendix A.
This is the 8th Quarterly EM&A Report summarising the findings of EM&A activities conducted under the Contract from 1 April 2017 to 30 June 2017 (the “reporting period”).
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 1.3: 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 |
Eddie Tang (until 29 May
2017) |
9863 7686 |
2459 4336 |
|
Jason Chung (from 29 May
2017) |
9127 8369 |
2459 4336 |
|
Environmental
Officer |
Jason Chung (until 29 May
2017) |
9127 8369 |
2459 4336 |
|
|
Xavier Lam |
9493 2944 |
2459 4336 |
|
|
Billy Lao (from 26 Jun
2017) |
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: 4 no. bays completed.
● Box Culvert C: Bay 5 Base slab, wall and roof completed; Bay 4 base slab completed.
● Box Culvert D: Bay 3 Base slab, wall and roof completed; Bay 4 Wall and roof slab completed.
● Pile Cap: 7 no. completed.
● Pier Column: 24 no. completed.
● Segment Erection: 155 no. completed.
● Segment Delivery: 323 no. completed (marine-based).
● No generation of excavated marine sediment.
The 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 and noise monitoring works for the Contract are covered by Contract No. HY/2010/02 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Reclamation Works” 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 and , noise monitoring at NMS2 and NMS3B as part of EM&A programme if these monitoring stations are no longer covered under Contract Nos. HY/2010/02 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.
A summary of air and noise monitoring locations are presented in Table 2.1. The location of air quality and noise monitoring stations are shown as in Figure 2.1 and Figure 2.2, respectively.
Table 2.1: Construction Dust and Noise Monitoring Locations
Environmental Monitoring |
Identification No. |
Location Description |
Air Quality |
AMS6(1) |
Dragonair/CNAC
(Group) Building |
|
AMS7 (1) |
Hong Kong
SkyCity Marriot Hotel |
Noise |
NMS2(2) |
Seaview
Crescent |
|
NMS3B(2)
(3) |
Site Boundary
of Site Office Area at Works Area WA2 |
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.
(2) 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.
(3) The Action and Limit Levels for schools will be applied for this alternative monitoring location.
The water quality monitoring works for the Contract are covered by Contract No. HY/2010/02 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Reclamation Works”. 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 at these stations as part of EM&A programme if these monitoring stations are no longer covered under Contract No. HY/2010/02. However, this is subject to ENPO’s final decision on which ET should carry out the monitoring work at these stations.
Table 2.2 and Figure 2.3 show the locations of water quality monitoring stations.
Table 2.2: 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* |
Impact
Station (Close to HKBCF construction site) |
812577 |
820670 |
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* |
Sensitive
receivers (Artificial Reef in NE Airport) |
811489 |
820455 |
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* |
Control
Station |
809989 |
821117 |
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 |
Remark: On 15 May 2017, IEC/ENPO notified ET of changes to the EM&A Programme regarding some water quality monitoring stations being conducted by Contract No. HY/2010/02. These changes were certified by the ETL of Contract No. HY/2010/02 and verified by the IEC on 24 March 2017, and approved by EPD on 12 May 2017. Three monitoring stations, namely IS10, SR5 and CS(Mf)3 (marked *), were replaced by IS10(N), SR5(N) and CS(Mf)3(N) respectively (marked #, shown in red bold font).
The dolphin monitoring works for the Contract are covered by Contract No. HY/2010/02 “Hong Kong-Zhuhai-Macao Bridge HKBCF – Reclamation Works”. The ET of the Contract or another ET of the HZMB project is required to conduct dolphin monitoring at the twenty-three transects as part of EM&A programme if these transects are no longer covered under Contract No. HY/2010/02. 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.
On 15 May 2017, IEC/ENPO notified ET of changes to the EM&A Programme regarding some vessel-based transect lines for dolphin monitoring being conducted by Contract No. HY/2010/02. These changes were certified by the ETL of Contract No. HY/2010/02 and verified by the IEC on 24 March 2017, and approved by EPD on 12 May 2017. Due to these changes, the number of transect lines was revised to twenty-four.
Table 2.3 shows the co-ordinates for the transect lines and layout map until 15 May 2017. The co-ordinates for those transect lines which were changed on 15 May 2017 are summarised in Table 2.4 below.
The revised layout map showing the transect lines have been provided by AFCD and are shown in Figure 2.4.
Table 2.3: Impact Dolphin Monitoring Line Transect Co-ordinates (Provided by AFCD) (until 15 May 2017)
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# |
805475 |
815913 |
113.878079 |
22.281820 |
|
805477 |
826654 |
113.877896 |
22.378814 |
3 |
806464 |
819435 |
113.887615 |
22.313643 |
|
806464 |
822911 |
113.887550 |
22.345030 |
4 |
807518 |
819771 |
113.897833 |
22.316697 |
|
807518 |
829230 |
113.897663 |
22.402113 |
5 |
808504 |
820220 |
113.907397 |
22.320761 |
|
808504 |
828602 |
113.907252 |
22.396462 |
6 |
809490 |
820466 |
113.916965 |
22.323003 |
|
809490 |
825352 |
113.916884 |
22.367128 |
7# |
810499 |
820880 |
113.926749 |
22.326757 |
|
810499 |
824613 |
113.926688 |
22.360464 |
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 |
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 2.4 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.
Table 2.4: New Co-ordinates of Revised Impact Dolphin Monitoring Line Transects (with effect from 15 May 2017)
Transect |
HK Grid System |
|
|
X |
Y |
2 |
805476 |
820800 |
|
805476 |
826654 |
3 |
806464 |
821150 |
|
806464 |
822911 |
4 |
807518 |
821500 |
|
807518 |
829230 |
5 |
808504 |
821850 |
|
808504 |
828602 |
6 |
809490 |
822150 |
|
809490 |
825352 |
7 |
810499 |
822000 |
|
810499 |
824613 |
24 |
805476 |
815900 |
|
805476 |
819100 |
Remark: New coordinates shown in red bold font.
The monitoring requirements, monitoring equipment, monitoring parameters, frequency and duration, monitoring methodology, monitoring schedule, meteorological information are detailed in the quarterly EM&A reports prepared for Contract Nos. HY/2010/02 and HY/2011/03.
The Action and Limit Levels for 1-hr TSP and 24-hr TSP are provided in Table 2.5 and Table 2.6 respectively.
Table 2.5: 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 2.6: 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 |
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 quarterly EM&A report.
The Action and Limit Levels for construction noise are defined in Table 2.7.
Table 2.7: 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.
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 quarterly EM&A Report.
The Action and Limit Levels for water quality are provided in Table 2.8.
Table 2.8: 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 Action and Limit Levels for Chinese White Dolphin Monitoring are provided in Table 2.9 and Table 2.10, respectively.
Table 2.9: Action and Limit Levels for Chinese White Dolphin Monitoring - Approach to Define Action Level (AL) and Limit Level (LL)
|
North Lantau Social Cluster |
|
|
NWL |
|
Action Level |
(STG < 70% of baseline) & (ANI < 70% of baseline) |
(STG < 70% of baseline) & (ANI < 70% of baseline) |
Limit Level |
[(STG < 40% of baseline) & (ANI < 40%
of baseline)] AND [(STG < 40% of baseline) & (ANI < 40%
of baseline)] |
Table 2.10: 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)] |
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 event and action plans for air quality, noise, water quality and dolphin monitoring are provided in Appendix D.
Environmental mitigation measures for the contract were recommended in the approved EIA Report. Appendix E lists the recommended mitigation measures and the implementation status.
The monitoring results for AMS6 and AMS7 are reported in the monthly EM&A Reports (for April, May and June 2017) prepared for Contract Nos. HY/2011/03 and HY/2010/02 respectively.
Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 is reported in the monthly EM&A Reports (for April, May and June 2017) 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/2010/02 during the reporting period.
The monitoring results for NMS2 and NMS3B are reported in the monthly EM&A Reports (for April, May and June 2017) prepared for Contract No. HY/2010/02.
No noise exceedances were recorded at stations NMS2 and NMS3B by the ET of Contract No. HY/2010/02 during the reporting period.
The monitoring results for these stations are reported in the monthly EM&A Reports (for April, May and June 2017) prepared for Contract No. HY/2010/02.
One Action Level exceedance of SS was recorded by the Environmental Team of Contract No. HY/2010/02 during the reporting period.
The Action Level exceedance of SS was recorded at monitoring station IS(Mf)11 during flood tide on 28 April 2017 and was investigated by the ET of the Contract. According to the Contractor, no marine-based works and no marine-based transportation were conducted under the contract on 28 April 2017. It was concluded that the exceedance was not related to Contract No. HY/2013/04. Although the exceedance was considered to be not related to HY/2013/04, the Contractor was reminded to implement all necessary water quality mitigation measures identified in the EM&A Manual.
The details of water quality exceedances can be made reference to the monthly EM&A report under Contract No. HY/2010/02.
The monitoring results for dolphin monitoring during the reporting periods are reported in the monthly EM&A Reports (for April, May and June 2017) prepared for Contract No. HY/2010/02.
In response to the site audit findings, the Contractor carried out corrective actions. Details of site audit findings and the corrective actions during the reporting period are presented in Appendix F.
A summary of the Implementation Schedule of Environmental Mitigation Measures (EMIS) is presented in Appendix E. 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. Marine traffic records which indicated the number of trips data for crane barge, flat top barge and tug boat on the implementation of RMTRP for March 2017, April 2017 and May 2017 were checked by ET within the reporting period. Marine traffic records of March 2017, April 2017 and May 2017 were provided by Contractor to ER, ETL and IEC/ENPO for checking within the months of April 2017, May 2017 and June 2017 respectively. The checking of marine traffic records of June 2017 will be reported in the next Quarterly EM&A Report. The implementation of marine traffic follows the Regular Marine Travel Route Plan with respect to ET’s checking on the marine traffic records for the 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 summary of waste flow table is detailed in Appendix G.
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.
No marine sediment extracted from bored piling in this Contract was disposed to allocated dumping site via Contract No. HY/2013/03 during the reporting period. The quantities disposed up to end of June 2017 are in following table (Table 3.1):
Table 3.1: Summary of Marine Sediment disposed to Dumping Site via Contract No. HY/2013/03
Month/Year |
Type of Sediment and Quantity Disposed (m3) |
|
|
Cat. L (in Type I) |
Type II |
Up to end
March 2017 |
3,570 |
39,814 |
April 2017 |
0 |
0 |
May 2017 |
0 |
0 |
June 2017 |
0 |
0 |
Total = |
3,570 |
39,814 |
Note: For monthly breakdown of these quantities, please refer to the waste flow table in Appendix G.
The valid environmental licences and permits during the reporting period are summarized in Appendix H.
Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 is reported in the monthly EM&A Reports (for April, May and June 2017) 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/2010/02 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/2010/02 during the reporting period.
There were no complaints received in relation to the environmental impact during the reporting period. The details of cumulative statistics of Environmental Complaints are provided in Appendix H.
Notifications of Summons and Successful Prosecutions
Statistics on notifications of summons and successful prosecutions are summarized in Appendix I.
According to the environmental site inspections undertaken during the reporting period, the following recommendations were provided:
● The Contractor was reminded to provide suitable bund or drip tray for a chemical container.
● The Contractor was reminded to keep a panel door of a generator closed during operation to reduced noise impact.
● The Contractor was reminded to tidy up a works area and remove all loose waste items.
● The Contractor was reminded to clear the oily water from a drip tray and handle it was chemical waste.
● The Contractor was reminded to provide suitable bunding for oil drums.
● The Contractor was reminded to place loose general refuse items in general refuse bins.
● The Contractor was reminded to clear the stagnant water from a drip tray and provide a suitable label for the oil drum inside this drip tray.
● The Contractor was reminded to check if a NRMM label was required for a small air blower.
● The Contractor was reminded to provide a NRMM label of the correct colour for a generator.
● The Contractor was reminded to provide a drip tray for a small generator to contain any oil spill.
● The Contractor was reminded to keep a drip tray free from obstruction by some excavated C&D material.
● The Contractor was reminded to remove a NRMM label which had faded in colour from a generator.
A summary of the Implementation Schedule of Environmental Mitigation Measures (EMIS) is presented in Appendix E. Most of the necessary mitigation measures were implemented properly.
With implementation of the recommended environmental mitigation measures, the contract’s environmental impacts were considered environmentally acceptable. The weekly environmental site inspections ensured that all the environmental mitigation measures recommended were effectively implemented.
The recommended environmental mitigation measures, as included in the EM&A programme, effectively minimize the potential environmental impacts from the contract. Also, the EM&A programme effectively monitored the environmental impacts from the construction activities and ensure the proper implementation of mitigation measures. No particular recommendation was advised for the improvement of the programme.
Commencement of the Contract took place on 13 March 2015 and the construction works of the Contract commenced on 13 July 2015. This is the 8th Quarterly EM&A Report summarising the findings of EM&A activities conducted under the Contract from 1 April 2017 to 30 June 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 Reports (for April, May and June 2017) 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/2010/02 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/2010/02 during the reporting period.
One Action Level exceedance of SS was recorded by the Environmental Team of Contract No. HY/2010/02 during the reporting period. After investigation, it was concluded that the exceedance was not related to Contract No. HY/2013/04.
Impact dolphin monitoring results at all transects during the reporting period are reported in the monthly EM&A Reports (for April, May and June 2017) prepared for Contract No. HY/2010/02.
Environmental site inspection was carried out on 5, 12, 19 and 26 April, 4, 10, 17, 22 and 31 May and 7, 14, 19 and 28 June 2017. Recommendations on remedial actions were given to the Contractors for the deficiencies identified during the site inspections.
There were no complaints received in relation to the environmental impact during the reporting period. 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. Implementation Schedule for Environmental Mitigation Measures (EMIS)
Appendix F. Site Audit Findings and Corrective Actions
Appendix G. Waste Flow Table
Appendix H. Environmental Licenses and Permits
Appendix I. Statistics on Environmental Complaints, Notification of Summons and Successful Prosecutions