Improvements to
San Tin Interchange (Contract No. HY/2004/09)
Monthly
Environmental Monitoring & Audit Report
Report No. 1531
August December 2007
Improvements to
San Tin Interchange (Contract No. HY/2004/09)
Monthly
Environmental Monitoring & Audit Report
Report No. 1531
August December 2007
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 Cumulative Statistics on Complaints, Notifications of Summons and Successful Prosecutions
List
of Tables
Table 1.1 Details of Permits and Licenses issued in December 2007
Table 1.2 Summary of Environmental Submissions to EPD in December 2007
Table 1.3 Noise Monitoring Stations
Table 3.1 Summary of Noise Monitoring Results during Normal Working Hours
Table 3.2 Summary of Waste Disposal for December 2007
Table 5.1 Proposed Noise Monitoring Schedule for January 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 21st June 2005. This report is the fourteenth fifthirty-first monthly EM&A
report for the Project which summarises the monitoring results and audit
findings during the reporting period from 1st to 331st
1st AugustDecember
2007.
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 5th and 19th
DecemberAugust 2007. The Independent Environmental
Checker (IEC) undertook the site inspection on 19th DecemberAugust
2007.
·
Noise monitoring at three designated monitoring
stations was undertaken on 11th and 28th December 2007
during normal working hours. Also, o One ad-hoc
monitoring was undertaken on 12th August
2006 in response to following an exceedance of lLimit lLevel recorded on 11th August
2006.
·
Visual site surveillance for water quality was
undertaken on 5th, 11th, 19th and 28th
December 2007.
·
Site inspection for landscape and visual
resources was undertaken on 21st December 2007.
Breaches
of Action and Limit Levels
There was seven no environmental
exceedance recorded during this the reporting period, of which six were recorded
during reporting period.
Environmental
Non-Compliance
No environmental non-compliances were received during this reporting period.
There was
one The environmental
exceedance recorded during and one
non-compliance regarding to the normal working hours noise monitoring was due to
the measured Leq (30min) at on Monitoring Station CM1
was found to exceeding the Limit Level of
75dB(A), which was not in compliance with the requirements mentioned in EIA
Report and EM&A Manual. During the measurement period, concrete breaking
using a breaker was being undertaken at the Slip Road
A works area at side of San Tin Highway. The Contractor was advised to stop the
concrete breaking works in the concerned area immediately to avoid further
exceedances. Following the Event and Action Plan for
construction noise, additional noise measurement was conducted on the following
day (12th August 2006) during which no concrete breaking activity
was being undertaken. The measured Leq (30min) noise level was found to be
67dB(A). Thus, the Contractor was advised to provide mitigation measures as necessary such as and
reminded that movable noise barriers should be provided to avoid exceedances caused
by prior to any further site concrete breaking works in
the concerned area following the recommendations in Section 3.47 and Figure 3.5
of the Project EIA Report. Further to discussion with the Contractor, no
further concrete breaking activities will be required in the concerned area.
Following the Event and Action Plan for construction noise, additional noise
measurement was conducted on the following day (12th August
2006) in which no concrete breaking activity was being undertaken. The measured
Leq (30min) noise level was found to be 67dB(A).
Complaint
Log
No
environmental complaints were received during this reporting period.
Notifications
of Summons and Prosecutions
There
were no notifications of summons or prosecutions received 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:
·
Bored piling;
· Road widening works;
· Landscaping works;
· Road paving; and
·
Installation of railings.
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.
Seven Two Construction Noise Permits
(CNP) were issued in December 2007.
Details of the CNPs are summarised in Table 1.1. One
CNP (Permit No. PP-RN0026-06)
for carrying out percussive piling works from 15th August 2006 to 13th November 2006 was issued on 31st July 2006 and
received by the Contractor in August 2006.
Table 1.1 Details
of Permits and Licenses issued in August December 2007
|
Permit
/ License |
Reference No. |
Issue Date |
Expiry Date |
|
CNP for general construction work |
7th
December 2007 |
12th
March 2008 |
|
|
CNP for Erection of Sign Gantry |
24th
December 2007 |
7th
April 2008 |
1.3
Environmental Document
Submissions to EPD
A
summary of the status of the submissions to EPD as provided during the month of
August
December 2007
is presented in Table 1.2.
Table 1.2 Summary of Environmental Submissions to EPD in August December 2007
|
Item No. |
Document
Title |
Date of Submission |
|
1 |
Monthly
EM&A Report No. 30 for November 2007 |
14th December 2007 |
|
2 |
Quarterly
EM&A Summary Report No. 10 (September 2007 to November 2007) |
19th December 2007 |
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 San Tin
Highway |
826133 |
839839 |
|
CM2 |
Village house near San Tin
Highway |
826291 |
839918 |
|
CM3 |
Village house near Kwu Tung
Road |
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.
In this reporting period, the trees planting were progressing at the area in South Division (M6 and M2 works area). Landscape works were progressing at the N1 Division (near the site office) and South Division (M6 and M2 works area).
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 August December 2007, during the
normal working hours and restricted hours from 2300 to 0700 hours of
next day are summarised in Table 3.1. No noise monitoring was carried out
during the restricted hours as there were no construction activities during
these time periods.
There was were no environmental
exceedances of the Actione and Limit Levels for environmental exceedance of
the Action and Limit Levels for noise monitoring recorded during
the normal daytime hours within the reporting period.and
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 Normal Working Hours
|
Date
of Monitoring |
Normal Hours Noise Monitoring
Results Leq(30 minutes) dB(A) |
||
|
CM1 |
CM2 |
CM3 |
|
|
11th December 2007 |
64 |
73 |
58 |
|
28th December 2007 |
64 |
74 |
56 |
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.
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(1)
CM2 is a non-façade measurement location. A
positive correction of 3dB(A) has been applied to the measured noise level at
CM2 according to EPD’s guideline.
(1)
Underlined figure indicates exceedance of the Limit
Level of 50dB(A).
(1)
Time of measurement
at CM3 started after 23:59 hours (midnight) of Tthe “Date of
Monitoring” stated in the table. Therefore, the “Date of Monitoring” for CM3 refers to 18th and 1st September 2006,
respectively refers to the date of which nighttime noise monitoring
started.
Visual site surveillances for water quality were undertaken on 5th, 11th, 19th and 28th December 2007. Based on the visual inspection results, the Contractor has followed all necessary site practices for the maintenance of the site drainage system, included:
· removal of debris at the existing outfall near M6 to maintain water free flow.
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 August December 2007.
During the inspections, transplanted trees at N1 Division (near the site office) and South Division (near M2
and M6 works area) were found to be in poor condition. The contractor is reminded to closely
monitor these trees (with regular watering) to ensure their survival. Trees planting were progressing in N1
Division and South Division (M2 and M6 works areas).
Sandbags barrier encircling
the transplantation nursery in the N1 Division area was seen to have been
damaged. Some construction materials were seen to have accumulated on top of
the soil surface inside the nursery. The Contractor was reminded to clear up
the construction materials and place them in an appropriate storage area.
Damaged sandbags should be replaced by new ones to contain the soil
inside the nursery and prevent soil erosion.
Several trees inside the transplantation nursery in
the N2 Division aArea were
found to have fallen down during
the inspection on 15th
September 2006 due to the typhoon event in
early August 2006 and mid-September 2006. The Contractor
was reminded to replant these trees in the nursery to ensure their survival. The fallen trees were observed to have been replanted during inspection on 27th
September 2006.
The details of the landscape
and visual resources inspection reports 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 3.3Table 3.4Table 3.4Table 3.2.
Table 3.2 Summary of Waste Disposal for
DecemberAugust 2007
|
Waste Type |
Destination |
No. of Trips |
Quantity |
|
C&D Waste |
NENT Landfill |
17 |
85 m3 |
|
C&D Waste |
WENT Landfill |
1 |
5 m3 |
|
Building debris |
CEDD’s Tuen Mun
Area 38 Fill Bank |
147 |
735 m3 |
|
Sewage Holding
Tank Waste |
Collected by
Waylung Waste Services Ltd. |
13 |
- |
|
Chemical Waste |
Collected by
Dunwell Enviro-Tech (Holdings) Ltd. |
1 |
1,100 litre |
Site inspections were undertaken on 5th and 19th December 2007. The Independent Environmental Checker (IEC) undertook the site inspection on 19th December 2007. Specific locations within the site were identified during the inspection for improvements in proper implementation of the environmental mitigation measures. These include:
· Removal of debris and sediment at the existing outfall at M6 as proper maintenance.
· Cleaning the tracks of sand and silt on the public road near the site exit and ensure all vehicles’ wheels have been washed before leaving the site.
The
record of the site inspection findings is provided in Annex G.
4.2
Environmental Exceedance
During the reporting period,
seven
no environmental exceedance was recorded.
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. Cumulative
statistics on complaints, notifications of summons and successful prosecutions
for the Project are provided in Annex H.
5.1
Key Issues for the Coming Months
The
key issues with respect to the works in the forthcoming 2 months include
landscaping works and road paving.
5.2
Monitoring Schedules for the Next
Month
The proposed schedule
for noise monitoring in September January 2008 is provided in Table
5.1.
Table 5.1 Proposed Noise
Monitoring Schedule for September January 2008
|
Date |
Noise
Monitoring Station |
|
15th
|
CM1, CM2 and CM3 |
|
29th
January 2008 (Tuesday) |
CM1, CM2 and CM3 |
There
was no environmental non-compliance attributable to the Project works during
reporting period.
There
was six
no exceedance
recorded during the reporting period.
There was one exceedance
non-compliance
of the Limit Level recorded during the normal hours
noise monitoring due to concrete breaking activities in project works area
during the reporting period.
No
environmental complaints, prosecutions or summons was received during the
reporting period.