A1                                      EM&A Requirements

A1.1                                Introduction

This Annex provides a summary of the specific EM&A requirements for the designated and potentially designated elements incorporated within the DSD works Package 1A-1T Kam Tin Trunk Sewerage Phase 1.  The same methodology and equipment will be employed for the noise, air and water quality monitoring as outlined in Sections 5 to 7 of the main body of the EM&A Manual.

 

A1.2                                Air Quality Monitoring

As outlined in Section 5 of the EIA(DE) Report, the appointed Contractor will be responsible for conducting air quality monitoring at the following representative monitoring stations, as defined in Table A1.2b and shown in Annex C, Figures C1 - C5.

 

Table A1.2a presents the recommended types and quantities of TSP monitoring equipment required, although the exact requirements will depend on the manpower employed by the contractor.

 

Table A1.2a    TSP Recommended Monitoring Equipment

Description

Quantity

High Volume sampler

5 units

Hand-held direct reading dust meter

1 units

 

Table A1.2b    EM&A Representative Monitoring Locations

ASR No.

Identity/Description

AM 1

Worksite Boundary facing scattered house in Nam Sang Wai

AM 2

Worksite Boundary in Nam Sang Wai

AM 5

Worksite Boundary facing Fung Kat Heung

AM 6

Worksite Boundary facing scattered house near Route 3

AM 7

Worksite Boundary facing scattered house in Nam Sang Wai

 

Prior to the commencement of the EM&A programme, the proposed air quality monitoring stations shall be discussed and agreed with the Engineer, IC(E) and EPD. When positioning the samplers, the following points shall be noted:

 

·         a horizontal platform with appropriate support to secure the samples against gusty wind shall be provided;

·         no two sampler shall be placed less than 2 metres apart;

·         the distance between the sampler and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the sampler;

·         a minimum of 2 metres separation from walls, parapets and penthouses is required for rooftops samplers;

·         a minimum of 2 metres separation from any supporting structure, measures horizontally is required;

·         no furnace or incinerator flue is nearby;

·         airflow around the sampler is unrestricted;

·         the sampler is more than 20 metres from the dripline;

·         any wire fence and gate to protect the sampler, shall not cause any obstruction during monitoring;

·         permission must be obtained to set up the samplers and to obtain access to the monitoring stations; and

·         a secured supply of electricity is needed to operate the samplers.

 

 

A1.3                                Noise Monitoring

As outlined in Section 6 of the EIA(DE) Report, the appointed Contractor for this works package will be responsible for conducting noise monitoring at the following representative monitoring stations, as defined in Table A1.3b and shown in Annex C, Figures C6-C11.

 

Table A1.3a  lists the suggested quantities of noise monitoring equipment required for the Project, although the exact requirements will be dependent upon the manpower employed by the Contractor to perform the monitoring.

 

Table A1.3a    Noise Monitoring Equipment

Description

Quantity

Noise meter

2 unit

Calibrator

2 unit

Hand-held anemometer

2 unit

 

Table A1.3b    EM&A Representative Monitoring Locations

NSR No.

Identity/Description

NM1

Yuk Yat Garden Phases II (D4)

NM2

Planned CDA Site (A/YL-KTN/60) (D9)

NM3

Scattered House in Nam San Wai (D12)

NM4

Scattered House in Nam San Wai (D11)

NM5

Nam San Wai (D15)

NM6

Scattered House near Route 3 (D17)

NM7

Fung Kat Heung (D19)

NM8

Kam Hing Wai (D23)

NM15

Hip Tin Kung (D27)

 

Prior to the commencement of the EM&A Programme, the proposed noise monitoring locations will be discussed and agreed with the Engineer, IC(E) and the EPD. If, for example, there are difficulties obtaining access to the proposed noise monitoring locations, alternative monitoring locations may be proposed.  The selection of these alternative monitoring locations shall be chosen on the following criteria:

 

·         at locations close to the major site activities which are likely to have noise impacts;

·         close to the NSRs (any domestic premises, hotel, hostel, temporary housing accommodation, hospital, medical clinic, educational institution, place of public worship, library, court of law, performing arts centre shall be considered as a NSR); and

·         for monitoring locations located in the vicinity of the NSRs, care shall be taken to cause minimal disturbance to the occupants during monitoring.

 

The monitoring station shall normally be at a point 1 m from the exterior of the sensitive receiver building façade and at a height approximately 1.2 m above the ground or at the height that has the least obstructed view of the construction activity in relation to the receiver.  If there is a problem with access to the normal monitoring position, an alternative position may be chosen, and a correction to the measurements shall be made.  For reference, a correction of +3 dB(A) shall be made to the free field measurements.  The ET Leader shall agree with the IC(E) and EPD on the monitoring positions and the corrections adopted.  Once the positions for the monitoring stations are chosen, the baseline monitoring and impact monitoring shall be carried out at the same positions.

 

         

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