Improvements to

San Tin Interchange (Contract No. HY/2004/09)

 

 

Monthly Environmental Monitoring & Audit Report

Report No. 37

 

 

June 2008

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Table of Content

1            Environmental Status. 1

1.1         Works undertaken during the Reporting Period. 1

1.2         Environmental Permit and Licences. 1

1.3         Environmental Document Submissions to EPD.. 1

1.4         Environmental Monitoring Locations. 1

2            Environmental Measures and Implementation Status. 2

3            Monitoring Results. 2

3.1         Noise Monitoring. 2

3.2         Water Quality Monitoring. 3

3.3         Landscape and Visual Resources. 3

3.4         Ad-hoc Air Quality Monitoring. 4

3.5         Waste Management 4

4            Environmental Audits. 4

4.1         Site Inspection and Audit 4

4.2         Environmental Exceedance. 4

4.3         Environmental Non-compliance. 4

4.4         Environmental Complaint and Prosecution. 5

5            Forecast and Schedule. 5

5.1         Key Issues for the Coming Months. 5

5.2         Monitoring Schedules for the Next Month. 5

6            Conclusion. 5


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 Normal Working Hours

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 21st June 2005.  This report is the thirty-seventh monthly EM&A report for the Project which summarises the monitoring results and audit findings during the reporting period from 1st June 2008 to 30th June 2008.

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 20th June 2008.  The Independent Environmental Checker (IEC) undertook the site inspection on 4th June 2008.

·         Noise monitoring at the designated monitoring stations was undertaken on 23rd and 27th June 2008 during normal working hours.

·         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 23rd June 2008.

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                     Environmental Status

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

GW-RN0212-08

11th June 2008

12th November 2008

CNP for general construction work

GW-RN0213-08

11th June 2008

12th November 2008

 

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

15th June 2008

2

Quarterly EM&A Summary Report No. 12 (March 2008 to May 2008)

25th June 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 San Tin Highway

826133

839839

CM2

Village house near San Tin Highway

826291

839918

CM3

Village house near Kwu Tung Road

826605

840076

 

2                     Environmental Measures and Implementation Status

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                     Monitoring Results

3.1               Noise Monitoring

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 Normal Working Hours

Date of Monitoring

Measured Noise Level Leq(30 minutes) dB(A)

CM1

CM2

CM3

23rd June 2008

64

74

55

27th June 2008

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.

 

3.2               Water Quality Monitoring

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 Castle Peak Road.

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.

3.5               Waste Management

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

 

4                     Environmental Audits

4.1               Site Inspection and Audit

Site inspections were undertaken on 4th and 20th June 2008.  The Independent Environmental Checker (IEC) undertook the site inspection on 4th June 2008.  Specific locations within the site were identified during the inspection for improvements in proper implementation of the environmental mitigation measures.  These include:

·      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                     Forecast and Schedule

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 July 2008 is provided in Table 5.1.

Table 5.1   Proposed Noise Monitoring Schedule for July 2008

Date

Noise Monitoring Station

2nd July 2008 (Wednesday)

CM1, CM2 and CM3

15th July 2008 (Wednesday)

CM1, CM2 and CM3

 

6                     Conclusion

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.