1. Introduction

1.1. Background

1.1.1. Bestwise – Sun Fook Kong Joint Venture (the Contractors) appointed 3NV Technology Limited (3NV) to undertake the Landscape and Visual Monitoring for the Operational Phase of the “Enhancement of Deodourisation System at Stonecutters Island Sewage Treatment Works” (hereafter referred to as “the Project”).

1.1.2. The Project is part of the Harbour Area Treatment Scheme (HATS) Stage 2A. According to Environmental Permit No. EP-322/2008/G issued on 9th May 2014 by the Environmental Protection Department (hereinafter called EPD) to the Drainage Services Department (hereinafter called the DSD) as the Permit Holder and the EM&A Manual for the HATS Stage 2A, all landscape and visual mitigation measures shall be monitored monthly on-site during the first year of the Operational Phase at 8 preliminary treatment works (PTW) and the Stonecutters Island Sewage Treatment Works (SCISTW).

1.2. Objectives

1.2.1. The objective is to monitor and audit the contractor’s landscape works, in particular, to ensure the existing trees retained on-site are being well preserved, tree transplanting and felling operations are being undertaken in accordance with the requirements, procedures, and specifications as stipulated in the contract and the approvals granted by concerned authorities, and all the newly planted vegetations are being maintained properly during the establishment period.

2. Landscape and Visual (L&V)

2.1. Monitoring Requirement

Under the EM&A Manual, Landscape and Visual Monitoring audit should be undertaken during the first year of the Operational Phase to ensure and check that the implementation and maintenance of landscape and visual mitigation measures are carried out by a Registered Landscape Architect (RLA).

2.2. Monitoring Frequency

2.2.1. Site inspections should be undertaken once every month through the first year of the Operational Phase.

2.3. Monitoring Locations

2.3.1. Under this Project, there are 8 PTW and SCISTW that should be monitored. The details of the monitoring location are summarized in Table 1.1.

Table 1.1 L&V Monitoring Locations

No.	Description
1	North Point PTW
2	Wan Chai East PTW
3	Central PTW
4	Sandy Bay PTW
5	Cyberport PTW
6	Wah Fu PTW
7	Aberdeen PTW
8	Ap Lei Chau PTW
9	Stonecutter Island PTW

2.4. Monitoring Methodology

2.4.1. A Registered Landscape Architect is employed to monitor and audit the contractor’s landscape works, in particular, to ensure the existing trees retained on-site are being well preserved, tree transplanting and felling operations are being undertaken in accordance with the requirements, procedures, and specifications as stipulated in the contract and the approvals granted by concerned authorities, and all the newly planted vegetations are being maintained properly during the establishment period by complete a checklist.

3. L&V Monitoring Result

3.1. Inspection Result

3.1.1. Five new observations were found at Central PTW, Sandy Bay PTW, Wah Fu PTW and Stonecutter Island PTW. The completed checklist is shown in Appendix A.

3.2. Result Discussion

3.2.1. Generally, all L&V mitigation measures listed in EM&A were applied at 8 PTWs and SCISTW. Table 3.1 summarized the reminders and new observations of the 8 PTWs and SCISTW.

Table 3.1 Summary of Reminders and New Observations for the 8 PTWs and SCISTW

Monitoring Location	Reminders	New Observations
North Point PTW	1. Carry out proper maintenance to plantings 2. Increase the frequency of watering	N/A
Wan Chai East PTW	1. Carry out proper maintenance to plantings 2. Increase the frequency of watering	N/A
Central PTW	1. Carry out proper maintenance to plantings 2. Carry out remedial action or tree replacement of the unhealthy marked tree	1. Poor condition of tree was observed.
Sandy Bay PTW	1. Carry out proper maintenance to plantings 2. Increase the frequency of watering 3. Carry out remedial action or tree replacement of the unhealthy marked tree	1. Poor condition of tree was observed.
Cyberport PTW	1. Increase the frequency of watering 2. Increase the maintenance of pot plants	N/A
Wah Fu PTW	1. Carry out proper maintenance to plantings 2. Increase the frequency of watering 3. Close monitor on the condition of the marked tree	1. The condition of the tree for its large quantities of wilted leaves close to top of the tree crown.
Aberdeen PTW	1. Carry out proper maintenance to plantings 2. Increase the frequency of watering 3. Closely monitor the conditions of the pruned trees	N/A
Ap Lei Chau PTW	1. Carry out proper maintenance to plantings 2. Increase the frequency of watering	N/A
Stonecutter Island PTW	1. Close monitoring or tree risk assessment may be required especially for trees T110 & T109 2. Review the situation and to remove the trees by the maintenance party to reduce the safety risk	1. Some trees adjacent to trees T110 & T109 are severely tilted. 2. Some tree branches span over driveway.

- End of Report -

Table 1.1	L&V Monitoring Location
Table 3.1	Summary of Reminders and observations for the 8 PTWs and SCISTW