Improvements to
San Tin Interchange (Contract No. HY/2004/09)
Monthly
Environmental Monitoring & Audit Report
Report No. 37
June
2008
Table of Content
1.1 Works undertaken during the Reporting Period
1.2 Environmental Permit and Licences
1.3 Environmental
Document Submissions to EPD
1.4 Environmental
Monitoring Locations
2 Environmental Measures and Implementation Status
3.3 Landscape and
Visual Resources
3.4 Ad-hoc Air
Quality Monitoring
4.3 Environmental
Non-compliance
4.4 Environmental Complaint and Prosecution
5.1 Key Issues for the Coming Months
5.2 Monitoring Schedules for the Next Month
List of Annexes
Annex A Contractor’s Works Programme
Annex B Mitigation Measures Checklist
Annex C Calibration Certificates
Annex D Noise Monitoring Results
Annex E Water Quality Visual Inspection Reports
Annex F Landscape & Visual Resources Inspection Reports
Annex G Site Inspection Reports
Annex H Action and Limit Levels
Annex I Cumulative Statistics on Complaints, Notifications of Summons and Successful Prosecutions
List
of Tables
Table 1.1 Details of Permits and Licenses issued in June 2008
Table 1.2 Summary of Environmental Submissions to EPD in June 2008
Table 1.3 Noise Monitoring Stations
Table 3.1 Summary
of Noise Monitoring Results during
Table 3.2 Summary
of Waste Disposal for June 2008
Table 5.1 Proposed Noise Monitoring Schedule for July 2008
List
of Figures
Figure 1 Site Plan & Locations of Noise and Air Quality Monitoring Stations
Executive Summary
Atkins
China Limited (ACL) has been appointed by Chun Wo Construction &
Engineering Co., Ltd. to implement the Environmental Monitoring and Audit
(EM&A) programme for the construction works under Contract No. HY/2004/09
Improvements to San Tin Interchange (hereinafter, the Project).
The
construction of the Project commenced since
Environmental
Monitoring and Audit Progress
The
monthly EM&A programme was undertaken in accordance with the EM&A Manual. A summary of the monitoring activities
in this reporting period is listed below:
·
Site
inspections were undertaken jointly with the Contractor and Engineer’s
Representative (ER) on 4th and
·
Noise
monitoring at the designated monitoring stations was undertaken on 23rd
and
·
Visual
site surveillance for water quality was undertaken on 4th, 20th,
23rd and 27th June 2008.
·
Site
inspection for landscape and visual resources was undertaken on
Breaches of Action and Limit
Levels
There were no environmental
exceedances recorded during this reporting period.
Environmental Non-Compliance
No environmental non-compliances were received during this reporting period.
Complaint Log
No
environmental complaints were received during this reporting period.
Notifications of Summons and
Prosecutions
No
notifications of summons or prosecutions were recorded during this reporting
period.
Reporting Changes
This
report has been developed in compliance with the reporting requirements for the
subsequent monthly EM&A reports as required by the Project EM&A Manual.
Future Key Issues
The key issues with respect
to the works in the forthcoming 2 months include landscaping works and road
paving.
1.1
Works undertaken
during the Reporting Period
The
major construction activities undertaken during this reporting period are summarised
below:
·
Landscaping works; and
·
Road paving.
The
site plan of the Project is shown in Figure 1. The Contractor’s works programme is
provided in Annex A.
1.2
Environmental
Permit and Licences
There were no changes or clarification to the Environmental Permit (EP-190/2004) during the reporting period.
Two
Construction Noise Permits (CNP) were issued in June 2008. Details of the CNPs are summarised in Table 1.1.
Table 1.1 Details of Permits and
Licenses issued in June 2008
Permit / License |
Reference No. |
Issue Date |
Expiry Date |
CNP for general construction work |
|
|
|
CNP for general construction work |
|
|
1.3
Environmental Document Submissions to EPD
A summary of the status of the submissions to EPD as
provided during June 2008 is presented in Table 1.2.
Table 1.2 Summary of Environmental Submissions to EPD in June 2008
Item No. |
Document
Title |
Date of Submission |
1 |
Monthly
EM&A Report No. 36 for May 2008 |
|
2 |
Quarterly
EM&A Summary Report No. 12 (March 2008 to May 2008) |
|
1.4
Environmental Monitoring Locations
Noise monitoring was undertaken at three monitoring stations CM1, CM2 and CM3. The locations are shown on Figure 1. Description of these monitoring stations is provided in Table 1.3.
Table 1.3 Noise Monitoring Stations
Monitoring
Station ID |
Description |
Easting |
Northing |
CM1 |
Village house near |
826133 |
839839 |
CM2 |
Village house near |
826291 |
839918 |
CM3 |
Village house near |
826605 |
840076 |
The
mitigation measures listed in the Project EIA Report, EM&A Manual and
Environmental Permit and the implementation status are provided in Annex B.
During this reporting
period, the tree planting was progressing in the Laydown Area in North Division.
Based on site inspection findings, the Contractor has implemented the
required mitigation measures during construction works to date in general.
3.1.1 Noise Monitoring Equipment
Details
of the noise monitoring equipment are listed below and the calibration
certificates are presented in Annex C:
· Sound level meter ONO-SOKKI LA-5110
· Acoustical calibrator ONO-SOKKI SC-2110
· Hand-held anemometer
3.1.2 Noise Monitoring Methodology
The
sound level meter was calibrated with an acoustical calibrator prior to each
measurement. It was set on a tripod
at 1.2 m above local ground level at the monitoring station. Measurement of the A-weighted Leq(30
minutes) noise level for normal daytime hours was undertaken. Three consecutive A-weighted Leq(5
minutes) noise levels were measured for restricted hours monitoring. Wind speed was checked during the
monitoring period using the hand-held anemometer to ensure steady wind speed
did not exceed 5 m/s, or gusts did not exceed 10 m/s. After the noise measurement the sound
level meter was re-calibrated using the acoustical calibrator.
3.1.3 Noise Monitoring Results
Noise monitoring was undertaken on a biweekly basis when noise generating activities were underway. The noise monitoring results obtained in June 2008, during the normal working hours are summarised in Table 3.1, respectively. There were no construction activities during restricted hours from 1900 to 2300 hours on normal working days and all day on general holidays within this reporting period.
There were no environmental exceedances of the Action and Limit Levels for noise monitoring recorded during the normal daytime hours within the reporting period. Details of the monitoring time period and weather condition during the monitoring period and the graphical presentation of the noise monitoring results are provided in Annex D.
Table 3.1 Summary of Noise Monitoring Results during
Date
of Monitoring |
Measured Noise Level Leq(30
minutes) dB(A) |
||
CM1 |
CM2 |
CM3 |
|
|
64 |
74 |
55 |
|
64 |
74 |
55 |
Remark:
(1) CM2
is a non-façade measurement location.
A positive correction of 3 dB(A) has been applied to the measured noise
level at CM2 according to EPD’s guideline.
Visual site
surveillances for water quality were undertaken on 4th, 20th,
23rd and 27th June 2008. The key observations from the visual
inspection include:
·
Waste timber board and rubbish were found in the
sand trap near the West Abutment works area. The contractor had arranged workers to
remove the rubbish and timber board after the site inspection. They are reminded to collect and dispose
of C&D waste properly.
·
Deposited sand and silts were accumulated in the U-channels of the
site drainage. The contractor was
reminded to remove the deposited sands and silts in the U-channel regularly to
prevent blockage.
·
Stagnant water in the broken water-filled barrier near N1 Open
Laydown Area was observed. The
stagnant water in broken water-filled barrier was removed immediately. The contractor was reminded to clear any
stagnant water pools on site promptly, and to replace any broken water-filled
barrier.
·
Stagnant water was found accumulated in the works area near
The details of the water quality visual inspection reports are provided in Annex E.
3.3
Landscape and
Visual Resources
One site inspection on the
landscape and visual resources was undertaken in May 2008.
During the inspection, some transplanted trees at M2 in South Division and N1 Division near the
site office were seen to be in very poor condition. The Contractor
was reminded to properly maintain the transplanted trees so as to ensure their
survival. Two
transplanted trees at N1 Division near the site office appeared to be dead. Compensatory planting should be providing.
Overgrown weeds were seen inside
the planting area behind the site office in N1 Division and N2 Division. The contractor was reminded to remove the
weeds regularly as proper maintenance. Some trees in the planting area in N1
Division near site office were leaning. The leaning trees should be straightened
up to allow them to grow properly.
The details of the landscape
and visual resources inspection report are provided in Annex F.
3.4
Ad-hoc Air
Quality Monitoring
No ad-hoc air
quality monitoring was required during the reporting period.
The Contractor has adopted a trip ticket system for the disposal of construction wastes. According to the records provided by the Contractor, the disposal of construction waste within the reporting period is summarised in Table 3.2.
Table 3.2 Summary of Waste Disposal for June 2008
Waste Type |
Destination |
No. of Trips |
Quantity |
C&D Waste |
NENT Landfill |
30 |
150 m3 |
C&D Waste |
WENT Landfill |
4 |
20 m3 |
Building debris |
CEDD’s Tuen Mun Area 38 Fill Bank |
20 |
100 m3 |
Sewage Holding Tank Waste |
Collected by Waylung Waste Services Ltd. |
15 |
- |
Chemical Waste |
Collected by Dunwell Enviro-Tech (Holdings) Ltd. |
1 |
1,100 litre |
Site inspections were undertaken
on 4th and
·
Removing the rubbish
and timber board in the sand trap near the West Abutment works area and collect the C&D waste properly;
·
Removing the deposited
sands and silts in the U-channel of the site drainage regularly;
·
Removing stagnant
water promptly.
The
record of the site inspection findings is provided in Annex G.
4.2
Environmental Exceedance
There was no record of exceedance during this reporting period.
The Action and Limit Levels
for impact monitoring are provided in Annex H.
4.3
Environmental
Non-compliance
During
the reporting period, no environmental non-compliance was recorded.
4.4
Environmental
Complaint and Prosecution
During
the reporting period, no environmental complaints, prosecutions or summons were
received. The cumulative statistics on complaints, notifications of summons and
successful prosecutions for the Project are provided in Annex I.
5.1
Key Issues for
the Coming Months
The
key issues with respect to the works in the forthcoming 2 months include:
·
Road paving.
5.2
Monitoring
Schedules for the Next Month
The proposed schedule
for noise monitoring in July 2008 is provided in Table 5.1.
Table 5.1 Proposed Noise Monitoring Schedule for July 2008
Date |
Noise
Monitoring Station |
|
CM1, CM2 and CM3 |
|
CM1, CM2 and
CM3 |
There
was no environmental non-compliance attributable to the Project works during
reporting period.
There
were no exceedances of the noise Limit Level during the reporting period.
No environmental complaints, prosecutions or summons was received during the reporting period.