3                                       air quality

3.1                                  Introduction

This section presents the assessment of the potential air quality impacts arising from the construction and operation of the Designated and Potentially Designated Elements of the Project.

 

 

3.2                                  Relevant Legislation and Guidelines

The principal legislation for the management of air quality is the Air Pollution Control Ordinance, Cap 311 (APCO).  The Hong Kong Air Quality Objectives (HKAQOs) stipulate statutory limits for air pollutants, as presented in Table 3.2a.

Table 3.2a       Hong Kong Air Quality Objectives (mgm-3) (a)

Pollutant

Averaging Time

 

1 Hours

24 Hours (b)

1 Year (c)

Total Suspended Particulates (TSP)

-

260

80

Notes:

(a)  Measured at 298K (25°C) and 101.325 kPa (one atmosphere)

(b)  Not to be exceeded more than once per year

(c)  Arithmetic mean

 

In addition, the Technical Memorandum of Environmental Impact Assessment Ordinance (EIAO-TM) stipulates that a TSP concentration of 500 mgm-3 measured at 298K (25°C) and 101.325 kPa (one atmosphere) should not be exceeded for construction dust impacts. Mitigation measures for construction activities are specified in the Air Pollution Control (Construction Dust) Regulation and should be followed.

 

 

3.3                                  Baseline Environmental Conditions and Sensitive Receivers

3.3.1                             Baseline Environmental Conditions

The Kam Tin and Nam Sang Wai areas are located within a new development area.  The existing air quality within the Study Area is dominated by vehicle emissions from the Kam Tin Road, Kam Sheung Road, Route 3, Fan Kam Road, Route Twisk and cross boundary fluxes of pollutants.

 

There is currently no EPD air quality monitoring station (AQMS) in operation in the Kam Tin and Nam Sang Wai areas.  The nearest station that is most representative is located in Yuen Long.  The annual average background TSP concentration monitored at Yuen Long AQMS in 1999 was 102 mgm-3, which exceeds the HKAQO.

 

3.3.2                             Air Sensitive Receivers

Representative Air Sensitive Receivers (ASRs) were identified in accordance with the requirement in the EIAO-TM, through site inspections and reviews of landuse plans.  All the identified ASRs for Designated Elements and Potentially Designated Elements are summarised in Tables 3.3a and 3.3b, respectively and are shown in Figures 3.3 a to 3.3 f.

Table 3.3a       Locations of Air Sensitive Receivers for Designated Elements

ASRs

Location

Approximate Distance from Nearest Worksite Boundary (m)

S4

Sewers/Rising Mains between Kam Tin Sewage Pumping Station (KTPS) and Nam Sang Wai Sewage Pumping Station (NSWPS)

D1

Scattered House near Kam Tin Shi

80

D3

Yuk Yat Garden Phase III

40

D4

Yuk Yat Garden Phase II

20

D5

Ko Po Tsuen

80

D6

San Tao Home for the Aged

130

D8

Ha Ko Po Tsuen

140

D10

Fishery Research Station

320

D11

Scattered House in Nam Sang Wai

50

D12

Scattered House in Nam Sang Wai

5

S6

Sewers/Rising Mains from Nam Sang Wai Pumping Station (NSWPS) to Yuen Long STW

D13

Scattered House in Nam Sang Wai

140

D14

Planned Residential Development (DPA/YL-NSW/12)

380

D15

Nam Sang Wai

60

D16

Planned Recreational Development (DPA/YL-NSW/12)

60

D42

Tin Fook Wai Residential Development

30

Table 3.3b       Locations of Air Sensitive Receivers for Potentially Designated Elements

ASRs

Location

Approximate Distance from Nearest Worksite Boundary (m)

S1

Sewers/Rising Mains Along Kam Tin Main Drainage Channel (MDC) From Shui Tsan Tin Sewage Pumping Station (STTPS) to Ng Ka Tsuen Sewage Pumping Station (NKTPS)

D32

Ng Ka Tsuen Historical Building

85

D33

Ng Ka Tsuen

5

D38

Kam Tsin Wai

30

D39

Kam Kong Villa

5

S2

Sewers/Rising Mains Along Kam Tin Main Drainage Channel From Pang Ka Tsuen Pumping Station (PKTPS) to Kam Tin Pumping Station (KTPS)

D1

Scattered House Near Kam Tin Shi

25

D3

Yuk Yat Garden Phase III

95

D22

Kam Tin Shi North

40

D23

Kam Hing Wai

50

D24

Tai Hong Wai North

75

D25

Kam Tin Tung Tak Public School

125

D26

Scattered House Opposite To Proposed P6

40

S5

Branch Sewers/Rising Mains From Sha Po Pumping Station (SPPS) to S4

D19

Fung Kat Heung

60

D21

Mo Fan Heung

90

P1

Kam Tin Sewage Pumping Station (KTPS)

D1

Scattered House Near Kam Tin Shi

160

D3

Yut Yat Garden Phase III

85

D17

Scattered House Near Route 3

15

P2

Sha Po Sewage Pumping Station (SPPS)

D19

Fung Kat Heung

20

D21

Mo Fan Heung

200

P3

Nam Sang Wai Sewage Pumping Station (NSWPS)

D13

Scattered House I Nam Sang Wai

150

P4

Shui Tsan Tin Sewage Pumping Station (STTPS)

D41

Shui Tsan Tin Tsuen

100

P5

Ng Ka Tsuen Sewage Pumping Station (NKTPS)

D30

Scattered House Beside Kam Sheung Life Lutheran Church

30

D31

Kam Sheung Life Lutheran Church

35

D32

Ng Ka Tsuen Historical Building

5

P6

Pang Ka Tsuen Sewage Pumping Station (PKTPS)

D25

Kam Tin Tung Tak Public School

210

D26

Scattered House Opposite To Proposed P6

70

D27

Hip Tin Kung

55

P7

Leung Uk Tsuen Sewage Pumping Station (LUTPS)

D28

Scattered House Opposite To Leung Uk Tsuen

65

D29

Leung Uk Tsuen

60

 

 

3.4                                  Potential Impacts

3.4.1                             Construction Phase

Major activities associated with the construction of the sewers/rising mains and SPSs include:

 

·      excavation and backfilling of soil for site formation and trenching;

·      stockpiling of excavated materials;

·      foundation works for the SPSs; and

·      civil construction and E&M installation of the SPSs.

 

Potential dust generating activities could arise from the following operations:

 

·      materials handling;

·      wind erosion of stockpiles; and

·      truck movements on any unpaved roads.

 

As the sewers/rising mains will be constructed section by section, the volumes of excavated spoil are expected to be low.  The number of vehicle trips during construction is expected to be very small and for most areas, vehicle movements will be on paved roadways.  Only minimal movement of vehicles on unpaved roads will be required. 

 

ASRs located very close to the worksite boundary, including a scattered house near Kam Tin Shi (D1), Yuk Yat Garden Phase II (D4), scattered house in Nam Sang Wai (D12), scattered house near Route 3 (D17), scattered house opposite to proposed SPS P6 (D26), Ng Ka Tsuen Historical Building (D32), Ng Ka Tsuen (D33) and Kam Kong Villa (D39) may experience dust impacts.  However, it is expected that the dust impacts can be controlled by implementation of the mitigation measures recommended in Section 3.5 and through the Environmental Monitoring & Audit (EM&A) programme.

 

Cumulative Impacts

Several projects will be undergoing construction in parallel with this Project.  Details of the other concurrent projects have been presented in Section 2.  As the construction of the concurrent projects may be carried out simultaneously with this Project and given the close proximity of the worksites to the identified ASRs, cumulative dust impacts have the potential to arise.  However, it is the sewers/rising mains will be constructed in 50 m segments.  Given the very small scale of the construction works, the contribution to dust impacts is very limited.  In addition, construction works are governed by the Air Pollution Control (Construction Dust) Regulation, and hence the air quality impact should be maintained within the statutory dust criterion.Thus, with the limited contribution of dust from the Project, cumulative dust impacts would be expected to be within statutory dust criteria.

 

3.4.2                             Operational Phase

There will be no pollutant sources during the operation of the sewers/rising mains as sewage is to be transferred within and enclosed system.As some of the sewage pumping stations (SPSs) are located very close to sensitive uses, odour impacts would potentially occur during the operation.  Wet wells and screenings collection areas are the likely sources of odour at SPSs; however, the of SPSs does not usually cause adverse odour nuisance to nearby ASRs.  The design of the proposed SPSs will be similar to existing SPSs, ie the wet wells and screenings collection areas will be enclosed with the provision for odour removal systems, such as activated carbon filters. Adverse odour nuisance is not envisaged.  As a precautionary measure, it is recommended that the discharge point of the odour removal system should be directed away from the adjacent sensitive uses.  Moreover, an effective and regular maintenance programme should be put in place to maintain an odour removal efficiency of at least 90%.

 

 

3.5                                  Mitigation Measures

3.5.1                             Construction Dust

With the adoption of the following mitigation measures stipulated in the Air Pollution Control (Construction Dust) Regulation, the potential dust impact can be minimised to comply with the dust criterion:

 

·      where a site boundary adjoins a road, street, service lane or other area accessible to the public, a hoarding of not less than 2.4 m high from ground level should be provided along the boundaries of the seven pumping stations sites;

 

·      the portion of any road leading only to a construction site that is within 30 m of a discernible or designated vehicle entrance or exit should be kept clear of dusty materials;

 

·      any stockpile of dusty materials should be either covered entirely by impervious sheeting, placed in an area sheltered on the top and the 3 sides or sprayed with water so as to maintain the entire surface wet;

 

·      all dusty materials should be sprayed with water immediately prior to any loading and unloading so as to maintain the dusty materials wet;

 

·      every vehicle should be washed to remove any dusty materials from its body and wheels immediately before leaving a construction site;

 

·      where a vehicle leaving a construction site is carrying a load of dusty materials, the load should be covered entirely by clean impervious sheeting to ensure that the dusty materials do not leak from the vehicle;

 

·      water should be continuously sprayed on the surface where any mechanical breaking operation that causes dust emission is carried out, unless the process is accompanied by the operation of an effective dust extraction and filtering device;

 

·      the working area of excavation should be sprayed with water immediately before, during and immediately after the operation so as to maintain the entire surface wet;

 

·      where a scaffolding is erected around the perimeter of a building under construction, effective dust screens, sheeting or netting should be provided to enclose the scaffolding from the ground floor level of the SPS; and

 

·      any skip hoist for material transport should be totally enclosed by the impervious sheeting.

 

3.5.2                             Operational Phase

The following odour control measures should be implemented during the operation of the sewage pumping stations:

 

·      the main odour sources such as the wet well and screening house should be enclosed;

 

·      odour removal systems, such as activated carbon filters, should be installed to reduce the odour emissions;

 

·      proper design of the discharge point of the odour removal system should be adopted to direct the emission away from the adjacent sensitive uses;

 

·      the transportation of screenings during maintenance should be arranged so as to prevent odour impacts; and

 

·      effective and regular maintenance of the odour removal system should be performed to maintain the removal efficiency at least 90%.

 

 

3.6                                  Residual Impact

After the implementation of the recommended mitigation measures described in Section 3.5, there will be no adverse residual impacts associated with the construction and operation of the sewers/rising mains and sewage pumping stations.

 

 

3.7                                  Environmental Monitoring & Audit

Monitoring and auditing of air quality has been recommended for the construction phase.  Environmental monitoring stations should be set up to monitor the dust level during the construction of the Project.  The recommended dust monitoring locations are summarized in Table 3.7a and shown in Figures 3.7a to e.

Table 3.7a       Recommended Dust Monitoring Stations

Dust Monitoring Station

Location

Designated Element

S4

Sewers/Rising Mains between Kam Tin Sewage Pumping Station (KTPS) and Nam Sang Wai Sewage Pumping Station (NSWPS)

AM1

Worksite Boundary facing Scattered House in Nam Sang Wai

S6

Sewers/Rising mains from Nam Sang Wai Pumping Station (NSWPS) to Yuen Long STW

AM2

Worksite Boundary in Nam Sang Wai

Potentially Designated Element

S1

Sewers/Rising Mains along Kam Tin Main Drainage Channel (MDC) from Shui Tsan Tin Sewage Pumping Station (STTPS) to Ng Ka Tsuen Sewage Pumping Station (NKTPS)

AM3

Worksite Boundary facing Kam Kong Villa

S2

Sewers/Rising Mains along Kam Tin Main Drainage Channel from Pang Ka Tsuen Pumping Station (PKTPS) to Kam Tin Pumping Station (KTPS)

AM4

Worksite Boundary facing Scattered House opposite to Proposed P6

S5

Branch Sewers/Rising Mains from Sha Po Pumping Station (SPPS) to S4

AM5

Worksite Boundary facing Fung Kat Heung

P1

Kam tin Sewage Pumping Station (KTPS)

AM6

Worksite Boundary facing Scattered House near Route 3

P2

Sha Po Sewage Pumping Station (SPPS)

AM5

Worksite Boundary facing Fung Kat Heung

P3

Nam Sang Wai Sewage Pumping Station (NSWPS)

AM7

Worksite Boundary facing Scattered House in Nam Sang Wai

P4

Shui Tsan Tin Sewage Pumping Station (STTPS)

AM8

Worksite Boundary facing Shui Tsan Tin Tsuen

P5

Ng Ka Tsuen Sewage Pumping Station (NKTPS)

AM9

Worksite Boundary facing Scattered House beside Kam Sheung Life Lutheran Church

P6

Pang Ka Tsuen Sewage Pumping Station (PKTPS)

AM10

Worksite Boundary facing Hip Tin Kung

P7

Leung Uk Tsuen Sewage Pumping Station (LUTPS)

AM11

Worksite Boundary facing Leung Uk Tsuen

 

3.7.1                             Baseline Monitoring

Baseline monitoring should be carried out 1 month before the commencement of the construction works.  The monitoring should be conducted at the designated monitoring locations for at least 14 consecutive days to ascertain the existing 24-hr Total Suspended Particulate (TSP) concentrations.  1-hr sampling is also recommended to be undertaken at least 3 times per day at each monitoring location.

 

The baseline monitoring results form the basis for determining the air quality criteria for the impact monitoring.  Table 3.7b shows the air quality criteria, namely Action and Limit Levels for construction dust.  Should monitored TSP levels exceed the Action Level during construction, appropriate control measures will need to be employed to restore the dust level to an acceptable level.

Table 3.7b       Action and Limit Levels for Air Quality (Construction Dust)

Parameters

Action

Limit (mgm-3)

24 Hour TSP Level in mgm-3

For baseline level £ 200 mgm-3, Action level = (Baseline level * 1.3 + Limit level)/2;

For baseline level > 200 mgm-3, Action level = Limit level

260

1 Hour TSP Level in mgm-3

For baseline level £ 384 mgm-3, Action level = (Baseline level * 1.3 + Limit level)/2;

For baseline level > 384 mgm-3, Action level = Limit level

500

 

3.7.2                             Impact Monitoring

24-hour TSP concentrations should be measured utilising the techniques specified in High Volume Method for Total Suspended Particulates, Part 50 Chapter 1 Appendix B, Title 40 of the Code of Federal Regulations of the USEPA.  It is considered that this form of impact monitoring should be undertaken at the proposed monitoring locations once every 6 days.

 

Due to the lengthy delay between the sampling event and availability of the results for 24-hour sampling, 1-hour TSP sampling should also be conducted in response to any complaints about construction dust.  1-hour TSP levels, while assessed against different criteria, are considered to be indicative of the 24-hour results conducted on the same day.  In this way expedient remedial actions, should they be required, may be undertaken based on the 1-hour data, before the 24-hour results become available.

 

1-hour sampling, providing real time airborne particulate measurements, can be undertaken using a direct reading dust meter.  Despite the advantages of using a real time monitor to measure particulate concentrations such as in response to dust complaints, results are not comparable with 24-hour High Volume Sampler (HVS) data.  Therefore, if the use of a direct reading monitor is agreed for 1-hour TSP sampling, both baseline and impact monitoring must be carried out by the direct reading method. 

 

Specific dust control measures and monitoring during the construction phase should be included as part of the works contracts.  Regular compliance checking by the Environmental Checker and the Engineer at the site and at the Air Sensitive Receivers should be conducted.

 

 

3.8                                  Conclusion

Potential impacts arising from the construction and operation of the sewers/rising mains and sewage pumping stations are construction dust and odour, respectively.  With the implementation of the mitigation measures recommended in Section 3.5 and an effective monitoring and auditing programme, the potential construction dust and odour impacts will be minimised and kept within the relevant criteria.  In addition, cumulative dust impacts are also expected to be within the criteria.

 

 

3.9                                  Impact Summary

The air quality impacts during the construction and operational phases are summarized in Table 3.9a.

 


Table 3.9a       Impact Summary for Construction Dust

Parameters

Construction Dust

Assessment Criteria

·      Hourly dust criterion recommended in EIAO-TM is 500 mgm-3 and daily dust criterion stipulated in the Hong Kong Air Quality Objective (AQOs) is 260 mgm-3.

 

Air Sensitive Receivers

Designated Elements

 

S4

Sewers/Rising mains Between Kam Tin Sewage Pumping Station (KTPS) And Nam Sang Wai Sewage Pumping Station (NSWPS)

 

D1

Scattered House Near Kam Tin Shi

 

D3

Yuk Yat Garden Phase III

 

D4

Yuk Yat Garden Phase II

 

D5

Ko Po Tsuen

 

D6

San Tao Home for the Aged

 

D8

Ha Ko Po Tsuen

 

D10

Fishery Research Station

 

D11

Scattered House in Nam Sang Wai

 

D12

Scattered House in Nam Sang Wai

 

S6

Sewers/Rising Mains from Nam Sang Wai Pumping Station to Yuen Long STW

 

D13

Scattered House in Nam Sang Wai

 

D14

Planned Residential Development (DPA/YLMNSW/12)

 

D15

Nam Sang Wai

 

D16

Planned Recreational Development (DPA/YL-NSW/12)

 

D42

Tin Fook Wai Residential Development

 

Potentially Designated Elements

 

S1

Sewers/Rising Mains along Kam Tin Main Drainage Channel (MDC) from Shui Tsan Tin Sewage Pumping Station (STTPS) to Ng Ka Tsuen Sewage Pumping Station (NKTPS)

 

D32

Ng Ka Tsuen Historical Building

 

D33

Ng Ka Tsuen

 

D38

Kam Tsin Wai

 

D39

Kam Kong Villa

 

S2

Sewers/Rising Mains along Kam Tin Main Drainage Channel from Pang Ka Tsuen Pumping Station (PKTPS) to Kam Tin Pumping Station (KTPS)

 

D1

Scattered House near Kam Tin Shi

 

D3

Yuk Yat Garden Phase III

 

D22

Kam Tin Shi North

 

D23

Kam Hing Wai

 

D24

Tai Hong Wai North

 

D25

Scattered House near Kam Tin San Tsuen

 

D26

Scattered House opposite to Proposed P6

 

S5

Brach Sewers/Rising Mains from Sha Po Pumping Station (SPPS) to S4

 

D19

Fung Kat Heung

 

D21

Mo Fan Heung

 

P1

Kam Tin Sewage Pumping Station (KTPS)

 

D1

Scattered House near Kam Tin Shi

 

D3

Yut Yat Garden Phase III

 

D17

Scattered House near Route 3

 

P2

Sha Po Sewage Pumping Station (SPPS)

 

D19

Fung Kat Heung

 

D21

Mo Fan Heung

 

P3

Nam Sang Wai Sewage Pumping Station (NSWPS)

 

D13

Scattered House in Nam Sang Wai

 

P4

Shui Tsan Tin Sewage Pumping Station (STTPS)

 

D41

Shui Tsan Tin Tsuen

 

P5

Ng Ka Tsuen Sewage Pumping Station (NKTPS)

 

D30

Scattered House beside Kam Sheung Life Lutheran Church

 

D31

Kam Sheung Life Lutheran Church

 

D32

Ng Ka Tsuen Historical Building

 

P6

Pang Ka Tsen Sewage Pumping Station (PKTPS)

 

D25

Scattered House near Kam Tin San Tsuen

 

D26

Scattered House opposite to Proposed P6

 

D27

Hip Tin Kung

 

P7

Leung Uk Tsuen Sewage Pumping Station (LUTPS)

 

D28

Scattered House opposite to Leung Uk Tsuen

 

D29

Leung Uk Tsuen

Activities

Construction Phase

 

·      Dust level of 102 mgm-3 monitored at Yuen Long Air Quality Monitoring Station operated by EPD in 1999 was considered as a background dust level in the vicinity.

·      Dust nuisance from construction works are the major impact.

·      Major construction activities include excavation, backfilling, site formation, foundation works, stockpiling, concreting, trucks on unpaved road and construction of SPSs.

·      Materials handling, wind erosion of stockpiles, truck movement on the unpaved roads are the major dust generating activities among of the above mentioned construction activities.

·      Those ASRs located very close to the worksite boundary including scattered house near Kam Tin Shi (D1), Yuk Yat Garden Phase II (D4), scattered house in Nam Sang Wai (D12), scattered house near Route 3 (D17), scattered house opposite to proposed SPS P6 (D26), Ng Ka Tsuen Historic Building (D32), Ng Ka Tsuen (D33) and Kam Kong Villa (D39) have the potential to experience dust impacts.  However, it is expected that the dust impacts can be controlled by implementation of the mitigation measures recommended in Section 3.5 and through the Environmental Monitoring & Audit (EM&A) programme.

·      Cumulative impacts are expected to be minimal as the scale of our construction work is small and the contribution of the dust impact from this project is limited.

 

Operational Phase

 

·      Odour impacts from the operation of the sewers/rising mains are not expected;

·      As some of the proposed sewage pumping stations are located very close to the adjacent ASRs, odour impacts may occur 

Mitigation Measures

Construction Dust

 

Control measures stipulated in Air Pollution (Construction Dust) Regulation as follows:

 

·      where a site boundary adjoins a road, street, service lane or other area accessible to the public, hoarding of not less than 2.4 m high from ground level should be provided along the boundaries of the seven pumping stations sites and the works area where the Engineer’s site office and the Contractor’s site office erected;

·      the portion of any road leading only to a construction site that is within 30 m of a discernible or designated vehicle entrance or exit should be kept clear of dusty materials;

·      any stockpile of dusty materials should be either covered entirely by impervious sheeting, placed in an area sheltered on the top and the 3 sides or sprayed with water so as to maintain the entire surface wet;

·      all dusty materials should be sprayed with water immediately prior to any loading and unloading so as to maintain the dusty materials wet;

·      every vehicle should be washed to remove any dusty materials from its body and wheels immediately before leaving a construction site;

·      where a vehicle leaving a construction site is carrying a load of dusty materials, the load should be covered entirely by clean impervious sheeting to ensure that the dusty materials do not leak from the vehicle;

·      water should be continuously sprayed on the surface where any mechanical breaking operation that causes dust emission is carried out, unless the process is accompanied by the operation of an effective dusty extraction and filtering device;

·      the working area of excavation should be sprayed with water immediately before, during and immediately after the operation so as to maintain the entire surface wet;

·      where a scaffolding is erected around the perimeter of a building under construction, effective dust screens, sheeting or netting should be provided to enclose the scaffolding from the gound floor level of the SPS, or if a canopy is provided a the first floor level, from the first floor level, up to the highest level of the scaffolding; and

·      any skip hoist for material transport should be totally enclosed by the impervious sheeting.

 

Operational Phase

 

·      the main odour sources such as wet well and screening house should be enclosed;

·      an odour removal system, such as activated carbon filters should be installed to reduce the odour emissions;

·      proper design of the discharge point of the odour removal system should be adopted to direct emissions away from the adjacent sensitive uses; and

·      effective and regular maintenance of the odour removal system should be performed to maintain the removal efficiency at about 90%.

Residual Impacts

No adverse residual impacts identified during both construction and operational phases after the implementation of the mitigation measures.

Implementation

·      All the dust control measures should be implemented by the Contractor.

·      The odour control measures should be implemented by the DSD.

EM&A Requirement

EM&A is required.  Air monitoring stations include:

 

Designated Elements

 

S4

Sewers/Rising Mains between Kam Tin Sewage Pumping Station (KTPS) and Nam Sang Wai Sewage Pumping Station (NSWPS)

 

AM1

Worksite Boundary facing Scattered House in Nam Sang Wai

 

S6

Sewers/Rising mains from Nam Sang Wai Pumping Station (NSWPS) to Yuen Long STW

 

AM2

Workstie Boundary in Nam Sang Wai

 

 

Potentially Designated Elements

 

S1

Sewers/Rising Mains along Kam Tin Main Drainage Channel (MDC) from Shui Tsan Tin Sewage Pumping Station (STTPS) to Ng Ka Tsuen Sewage Pumping Station (NKTPS)

 

AM3

Worksite Boundary facing Kam Kong Villa

 

S2

Sewers/Rising Mains along Kam Tin Main Drainage Channel from Pang Ka Tsuen Pumping Station (PKTPS) to Kam Tin Pumping Station (KTPS)

 

AM4

Worksite Boundary facing Scattered House opposite to Proposed P6

 

S5

Branch Sewers/Rising Mains from Sha Po Pumping Station (SPPS) to S4

 

AM5

Worskite Boundary facing Fung Kat Heung

 

P1

Kam tin Sewage Pumping Station (KTPS)

 

AM6

Worksite Boundary facing Scattered House near Route 3

 

P2

Sha Po Sewage Pumping Station (SPPS)

 

AM5

Worksite Boundary facing Fung Kat Heung

 

P3

Nam Sang Wai Sewage Pumping Station (NSWPS)

 

AM7

Worksite Boundary facing Scattered House in Nam Sang Wai

 

P4

Shui Tsan tin Sewage Pumping Station (STTPS)

 

AM8

Worksite Boundary facing Shui Tsan Tin Tsuen

 

P5

Ng Ka Tsuen Sewage Pumping Station (NKTPS)

 

AM9

Worksite Boundary facing Scattered House beside Kam Sheung Life Lutheran Church

 

P6

Pang Ka Tsuen Sewage Pumping Station (PKTPS)

 

AM10

Worksite Boundary facing Hip Tin Kung

 

P7

Leung Uk Tsuen Sewage Pumping Station (LUTPS)

 

AM11

Worksite Boundary facing Leung Uk Tsuen

 

 

 

 

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