2.3.2 Option (a) would not be feasible as it would require 8000 m2 of land and induce groundwater pollution.

2.3.3 Option (b) was rejected due to the uncertainty about the impacts of residual pollutants on human health.

2.3.4 For Option (c), two possible disposal routes were considered: (1) export of raw sewage to the planned Tung Chung New Town sewerage network for transfer to Siu Ho Wan STW and (2) transport raw sewage to the existing Tai O sewerage system for treatment at Tai O STW. These options were rejected because of concerns over potential leakage from the foul sewage pipeline in particular the route from Ngong Ping to Tai O would run through water gathering ground and Country Park which are highly environmental sensitive areas. The disposal route from Ngong Ping to Tung Chung is also not considered environmentally acceptable due to the reasons discussed in Section 2.5 below.

2.3.5 For discharge to marine waters of North Western and Southern WCZ, Option (d), a somewhat lower level of treatment could be considered. It was however not favoured due to the similar concerns as described in Section 2.3.4 about the potential leakage of pipeline through the water gathering ground and country park and a higher level of treatment would have to be incorporated irrespective of the discharge location. Furthermore, discharge of effluent to marine waters of North Western and Southern WCZ would require the construction of extended outfall. Construction of extended outfall would cause significant water quality impact due to the required dredging and filling operations.

2.3.6 In summary, local treatment is considered necessary due to the potential environmental impacts arising from export of raw sewage through the water gathering ground and country parks, i.e. potential pollution to the Shek Pik Reservoir and adverse impacts on important habitats and breeding grounds of rare species. Option (e) for treatment at Ngong Ping followed by disposal of effluent to Group B inland waters and at the shoreline of bays or coastal waters of North Western and Southern WCZ was selected for further assessment.

2.4 Sites for Sewage Treatment

2.4.1 The main constraints for the STW sites are the available land area, the area requirements for the level of treatment required, and geotechnical conditions. The level of treatment will preferably be designed to fit within available, unallocated Government land without being too close to sensitive receivers or slopes, rather than requiring land resumption or the resolution of a conflict with other proposed land uses.

2.4.2 The original site proposed in the SMP sewerage implementation is shown in Drawing No. 23400/EN/030. This site was put forward before the Cable Car Project was proposed. This site would be of insufficient size because the flow projections have risen considerably since the SMP as a result of the new development proposals. Even if the size of the site could be increased, the site is no longer considered to be compatible with the activities of the Ngong Ping area, owing to its proximity to the proposed cable car terminal.

2.4.3 Two other alternative sites, namely Site A and Site B respectively, located on government land were proposed by Planning Department and are also shown in Drawing No. 23400/EN/030. Site A is on land currently zoned as green belt and Site B is on land zoned as conservation area (Ngong Ping Development Permission Area Plan DPA/I-NP/2). Both sites are considered suitable for a STW, however, there is a power cable running over site B which could impact construction works, and Site B offers less flexibility for expansion. Lands Department has confirmed the land status of the two sites as follows:

2.4.4 Site A is Government land currently under control of Lands Department. No clearance action would be deemed necessary.

2.4.5 A major part of Site B falls within an existing Government Land Licence for tea plantation, clearance of which will involve crop assessment and payment of compensation. Compared with Site A, Site B was heavily wooded. Development of this site will require felling of more trees and may necessitate diversion of an existing overhead power line. Assuming this site is selected, further ground survey would be required to confirm whether any removal of grave is necessary. A processing lead time of 6 to 9 months for clearance of this site would be expected. Furthermore, the site is in an area zoned as CA - Conservation Area.

2.4.6 Major environmental concerns for the STW sites are discussed in the following sections.
Ecology

2.4.7 As shown in Drawing No. 23400/EN/030, there is a Site of Special Scientific Interest (SSSI) south of the monastery. Romers tree frogs live along the stream flowing through this SSSI, which is known to have one of the largest populations of this species in Hong Kong. The 2 new STW sites suggested by Planning Department are situated in low scrub area (Site A) and plantation woodland (Site B). Field investigation found that Site A was mainly covered with grass with occasional plantation trees, while Site B was covered by tall trees. Construction at site A would entail minimal tree cutting when compared with Site B, which is within a Conservation Area.

Construction Noise and Air Quality

2.4.8 The air and noise sensitive receivers were identified to be the scattered village houses at Ngong Ping plateau, the Po Lin Monastery, the Ngong Ping Youth Hostel and the villages of Tei Tong Tsai, Shek Pik Au, Shek Mun Kap along the Tung Chung export sewer route. Construction noise and dust emission are unlikely to be a major concern for construction of the treatment works due to the limited extent of the construction works, assuming that Site A or B is selected, which are relatively long distances from the major air and noise sensitive receivers. Nevertheless, the contractor would be required to abide by the relevant provisions of the Noise Control Ordinance and Air Pollution Control Ordinance as well as their subsidiary legislation. General construction works during daytime, or non-restricted hours (0700 to 1900 hours on any day not being a general holiday), is not controlled under the Noise Control Ordinance. Yet, there are guidelines given in Annex 5 of the EIAO-TM for the purpose of daytime construction noise predictions in the EIA. This EIA will therefore identify if there are any impacts and recommend practicable noise mitigation measures where appropriate.

Operational Air Quality

2.4.9 Odour nuisance is an important factor to be addressed in the operation phase of the sewerage project. The proposed cable car terminal developments are close to the STW and may be affected by odour problems during the STW operation. Given that no pumping mains are expected to be required in the upstream sewerage system, high levels of hydrogen sulphide are not expected. Nevertheless, key components of the treatment process, such as the screening and grit removal area, require careful design, and the need, space and cost requirements for covering the facilities and for deodorization have to be considered.

Operational Noise

2.4.10 Operational noise from the proposed STW and pump chambers is unlikely to be a major issue if all the equipment of the STW are located in an indoor building envelope, assuming that Site A or B is selected, which are relatively long distances from the noise sensitive receivers.

Landscape and Visual

2.4.11 It is anticipated that the STW would not comprise any tall structures. A low STW could be considered to limit the potential visual impacts, but this could increase construction costs and noise generated by excavation in rock.

2.4.12 The use of Site B would require the felling of numerous trees, whereas the use of Site A would have a relatively low impact on the existing landscape. No stream was found in either Site A or B.

2.4.13 Key potential viewpoints include the Ngong Ping Road, the proposed cable car and terminal and the summit of the Big Buddha. Setting the treatment facilities back from the road would help to mitigate the impact to road users. Suitable buffer and landscaping features along the boundary of the STW will be required to minimise environmental and landscape impacts and to shield the STW from view from these locations. At Site A such features would be required along several boundaries, whereas at Site B this may be necessary only for the roadside boundary. Sufficient space must be allowed in the layout of the STW for such landscaping.

Burial Grounds and Antiquities

2.4.14 No burial grounds or antiquities were identified within both potential STW sites during field investigation.

2.4.15 A summary of comparing the suitability of the two sites is given in Table 2.3 below.

	The treatment works should be reasonably compact to help limit visual impact;
	Emergency storage tanks would be necessary to allow effluent to be stored for several days in the event of a major problem with the effluent pipeline;
	Significant areas of the available land need to be devoted to landscaping, to ensure low visual impact;
	The major construction work should preferably be well clear of the major slopes.

	along the existing footpath east of Ngong Ping towards Tung Chung;
	along the proposed footpath of the cable car route towards Tung Chung;
	along the Ngong Ping-Sham Wat road towards Sham Wat;
	along the Ngong Ping – Tai O road towards Tai O; and
	along Keung Shan Road towards Tung Wan.

	Ecological/environmental issues - increased disturbance would be imposed on the local fauna and flora due to the construction of the export pipeline along the cable car trail. The disturbance is expected to be more substantial in the lower part of the route where no footpath exists currently. The route cuts through the Lantau North Country Park with much of the route cutting through grassland and secondary broadleaved woodland. A possibility of the presence of rare or protected invertebrate and fish species in the rocky stream beds which flow off Nei Lik Shan was identified in the cable car feasibility study.
	Topography - the proposed route goes to the east of Nei Lik Shan from Ngong Ping and then rises slightly before dropping off towards Tung Chung. Because of this the pipeline would have to be pumped over the hill or tunnelled.
	Construction - the proposed cable car would not follow a continuous cleared ground route across land as the only locations requiring construction would be the pylon locations. The feasibility study for the Cable Car Project identified that these structures would have to be assembled on location from parts brought in by helicopter. Hence a dedicated road or path would need to be cleared and constructed along the route of the cable car to accommodate any pipeline for effluent disposal. This would also require the construction of several small bridges across the streams in the area.

	As shown in Drawing No. 23400/EN/031, the pipeline route would pass through a SSSI south of the monastery. Romers tree frogs were identified living along the stream flowing through this SSSI. The export sewer construction would be within an existing narrow footpath and is downstream of the frogs’ habitat. It is considered that this pipeline route would have potential impact on the ecology of the SSSI;
	The path is paved with concrete for the much of the route, but crosses outcrops of rock and several other obstacles such as streams and hills. Any pipeline following this route would also need to negotiate these obstacles;
	The route would pass through private Lot Nos. 160C, 160R.P., 161 and 235 in D.D. Ngong Ping as shown in Drawings No. 23400/EN/030 and 23400/EN/034. It is noticed that a section of road south of the Giant Buddha, which is part of the Tung Chung route, is marked private by non-government signboards. However, Lands Department confirmed that the starting section of the road is on unallocated Government land, whereas the remaining portion is within Government Land licensed for tea plantation purpose (see Drawing No. 23400/EN/030);
	It is uncertain whether any graves or crops would be affected; and
	Proper access should be available for maintaining the effluent disposal pipeline. Access for the routes towards Tung Chung would require considerable improvement for this purpose.

The Sham Wat stream and valley were previously identified to be of ecological value. The Sham Wat stream, downstream of the water intake point, is one of the most ecologically diverse in Lantau. A total of 15 fish species were recorded in biodiversity surveys, one of the highest fish species richnesses for local streams, and many migratory species were recorded. A goby species previously unrecorded in Hong Kong freshwaters, Redigobius cf. bikolamus was found. Other interesting records included the carp Nicholsicypris normalis and three sleepers, including the rarely seen Eleotris acanthopoma and E. melanosoma. The high abundance of these predatory species also suggested that a very productive ecosystem existed in Sham Wat Stream. In addition, the locally rare dragonfly Diplacodes nebulosa was also recorded. Three striped Grass Frog Rana macrodacryla have been found along the grassy banks (Source of Information: Outlying Island Sewerage Master Plan Stage 2 Review Final Report February 2002).

Sham Wat Road is narrow and is the only road access between Sham Wat and Ngong Ping. Although very little traffic uses this road, its closure even for short periods would be of major concern to the emergency services, for which Fire Services Department has expressed objection earlier.

Note:

1. Observations taken at junction of Ngong Ping Road, Keung Shan Road and Tai O Road.
2. Observations taken on 22 March (Wednesday) and 23 March 2000 (Thursday).
3. Morning session refers to the period from 11:00 to 12:00 and afternoon session from 14:00 to 15:00.
4. The numbers represent the volume of hourly both-way traffic averaged over the two counting days.

Constraints for Tai O export route include:

	The route would cross over streams with a diverse fish community and birds of conservation importance. However, as the effluent pipe will be laid under an existing double lane road, the impact to ecology will be temporary and minimal.
	Temporary traffic management would be required for both Ngong Ping Road and Tai O Road during pipeline construction. The roads are the only land access to prominent tourist attractions like Po Lin Monastery and Tai O Town. However, it is expected that the volume of traffic in the area would remain light in the medium term. Therefore, no significant impact on local coach service or emergency vehicle service is expected with appropriate traffic management measures.
	A route for a new pipeline through Tai O itself to any of the marine discharge sites shown in Drawing No. 23400/EN/029 would be difficult to achieve because of land constraints or lack of space. The alternative of connection to the existing sewerage system was considered, but this would lead to double treatment of the Ngong Ping sewage. Furthermore it would not solve the problem of construction works in Tai O, because this would require upgrading of sewers along the congested village paths. Construction impacts to residents of Tai O Town are expected if either of these options is adopted.

Towards Tung Wan

2.5.13 The route along Keung Shan Road towards Tung Wan is near the Shek Pik Reservoir. The whole section of Keung Shan Road is within the water gathering ground and is situated to the immediate west of Shek Pik Reservoir. In view of its close proximity to the reservoir, there may be concern on the effect of any leakage of the pipe on the water of the reservoir, although the chance of such occurrence is extremely small because the pipe would be fully concrete surrounded. A search of past bird surveys shows that birds of conservation interest such as Crested Goshawk, Bonelli's Eagle and Upland Pipit have been recorded in the nearby area. There was also a bat roost found recently further from Shek Pik Reservoir. Reference for "bird of conservation interest" and "bat roost" include:

	Ades, G.W.J. 1999. The species composition, distribution and population size of Hong Kong bats. Memoirs of Hong Kong Natural History Society 22:183-209.
	Carey, G. 1996. Hong Kong Bird Report 1995. Hong Kong Birdwatching Society, Hong Kong.
	Carey, G. 1998. Hong Kong Bird Report 1996. Hong Kong Birdwatching Society, Hong Kong.
	Carey, G. and Tai, S.L. 1999. Hong Kong Bird Report 1997. Hong Kong Birdwatching Society, Hong Kong.

2.5.15 Discharge is required to be outside the water gathering ground shown on Drawing No. 23400/EN/029. If the effluent is taken along the Ngong Ping - Sham Wat road then it may be possible to discharge to:

	a stream beyond the collection point for the catchwaters leading to Shek Pik reservoir and beyond the extended country park boundary;
	coastal waters of Sham Wat bay;
	coastal waters beyond the bay.

	a stream south of Tung Chung;
	the head of the Tung Chung storm drainage system;

a trunk sewer leading to Tung Chung pumping station and thence to Siu Ho Wan STW.

	Tai O creek, either directly or via a storm drain;
	south of Tai O Bay near Fan Kwai Tong (but not into the waters which will be enclosed by the Tai O Sheltered Boat Anchorage);
	north of Tai O Bay near ferry pier;
	waters north of Tai O Island;
	the existing trunk sewer (provided that the sewer is upgraded or an overflow is provided to peak flow conditions).

Coastal water of Tung Wan

Criterion / Issue	Sham Wat Route	Tung Chung/ Cable Car Route	Tai O Route	Tung Wan Route	Preferred Route
ENVIRONMENTAL CRITERIA
Operational water quality (long term impact)	Potential pollution of water gathering ground in case of pipe leakage. The proposed effluent discharge may affect the Sham Wat stream and valley, downstream of the water intake point, which is one of the most ecologically diverse in Lantau and is more environmentally sensitive as compared to the other three routes.	Potential pollution of water gathering ground in case of pipe leakage. Section within the water gathering ground would include a pressure main from which leakage may be more likely.	Potential pollution of water gathering ground in case of pipe leakage.	Potential pollution of water gathering ground in case of pipe leakage. Close proximity to Shek Pik Reservoir Potential direct contamination of the water of the reservoir if pipe leaks.	Tai O
Ecological impacts (permanent impact)	Need to construct new access road if selected as Sham Wat Road is a single-lane road. Construction work may affect the Sham Wat stream and valley which were previously identified to be of high ecological value. The Sham Wat stream, downstream of the water intake point, is one of the most ecologically diverse in Lantau.	Impinges upon Ngong Ping SSSI (potential impact to Romer’s tree frogs), potential impacts to cultivated land at Tung Chung. Although the Tung Chung route is on existing footpath, the route is difficult for construction as the path is narrow which crosses outcrops of rock and several other obstacles such as streams and hills. The Tung Chung route would also require the construction of new access roads if selected. For the cable car route, currently no existing road or footpath in the lower part of the route and would also require the construction of new road if selected.	All the way on two-lane existing roads. No new access road is required and therefore smaller disturbance to the environment. The route would cross over streams with a diverse fish community and birds of conservation importance.	Potential impact on birds of conservation interest such as Crested Goshawk, Bonelli’s Eagle and Upland Pipit previously recorded in the nearby area. There was also a bat roost recently found near Shek Pik Reservoir (Source of information is given in Section 2.5.13). However, the route is all the way on two-lane existing roads. No new access road is required and therefore smaller disturbance to the environment.	Tai O/Tung Wan
Cultural Heritage (Permanent Impact)	Sham Wat Wan is a designated Archaeological Site.	Potential impacts to temples and arches in Tei Tong Tsai.	The route is on existing road therefore no direct effect on cultural heritage impact.	Hung Shing Temple at Shek Pik is identified in the area. No direct impact since the route is along existing road.	Tai O/Tung Wan
Visual Impact (short term impact)	Sham Wat Road is sometimes used as a country park trail by trailers to Tai O or Sha Lo Wan. Visual impacts to visitors during construction is expected, but no permanent visual impacts (buried pipeline). However, if permanent access road required by DSD, there would be substantial permanent impacts.	Footpaths sparingly used by visitors. Minimal landscape impacts during construction which is carried out along footpaths, no permanent visual impacts (buried pipeline). However, if permanent access road required by DSD, there would be substantial permanent impacts.	Tai O Road is the most important access to Tai O. Potential visual impacts during construction to visitors travelling along Tai O Road or within Tai O Town are expected. No permanent visual impacts (mainly buried pipeline).	Potential visual impacts during construction to barbecue sites users and visitors travelling along Keung Shan Road. No permanent visual impacts (mainly buried pipeline).	Tai O/ Tung Wan
Construction waste, noise dust, and site runoff (short term impact)	General excavated materials during construction. Smaller amount as the route is shorter. Distance to nearest air and noise sensitive receivers about 155m. Potential water quality impacts on local streams due to the construction site runoff.	General excavated materials during construction. More earthworks is necessary to clear the route and for slope formation. Potential dust and noise impacts to Po Lin Monastery, YHA, and Tei Tong Tsai. Potential water quality impacts on local streams due to the construction site runoff.	General excavated materials during construction along existing road. Potential dust and noise impacts to residential developments along Tai O Road. Potential water quality impacts on local streams due to the construction site runoff.	General excavated materials during construction along existing road. Potential dust and noise impacts to village house near Tai Long Wan and campsites near Tung Wan. Potential water quality impacts on local streams due to the construction site runoff. Close proximity to Shek Pik Reservoir and may therefore cause direct contamination of the water in the reservoir.	Sham Wat
ENGINEERING CRITERIA
Length Within country park Within water gathering ground (WGG) To marine discharge / major storm drains	3.2 km 3.2 km     4.7 km	3.1 km 4.0 km     5.4 km	2.2 km 3.7 km     6.5 km	3.5 km 4.5 km     5.5 km		Sham Wat
Land Status	Government land for entire pipe length. Depending on the outfall option selected, resumption of 900 m2 private land may be required.	Pipeline impinges upon two private lots at Ngong Ping, "private road" confirmed to be within Government land.	Government land for pipe length up to Tai O Town; depending on option selected, may impinge upon private lots within Tai O Town or through villages.	Government land for entire pipe length.		Sham Wat/Tai O/ Tung Wan
Topographical constraints	Steep gradient along Ngong Ping Road and Sham Wat Road (~1 in 6) with one slightly uphill section (~1 in 150) of 100m at Ngong Ping Road.	Uphill section at pipeline start point (pumping station needed), varied gradients from Ngong Ping to Tei Tong Tsai and steep slopes onwards to Tung Chung.	Steep gradient along Ngong Ping Road and Tai O Road, with flat road section near to the Tai O end of Tai O Road. Flat terrain within Tai O Town, with uphill slope towards Tai O STW.	Steep gradient along Ngong Ping Road and Keung Shan Road.		Sham Wat/Tai O/ Tung Wan
Physical and Access constraints	Winding 2-lane Ngong Ping Road and 1-lane (mostly) Sham Wat Road (width~3.5m). Closure of Sham Wat Road required during construction. 50m-long bridge section of Ngong Ping Road	Existing footpath, new road may be needed for access	Winding 2-lane Ngong Ping Road and Tai O Road, 50m-long bridge section of Ngong Ping Road, short bridges (across catchwater and Tai O Creek) along Tai O Road	Winding 2-lane Ngong Ping Road and Keung Shan Road.		Tai O/Tung Wan
Traffic	Sham Wat Road only road access between Sham Wat and Ngong Ping, traffic management scheme necessary on Ngong Ping Road and Sham Wat Road. Strong objection from FSD received on closure of Sham Wat Road.	Footpath only access to Tei Tong Tsai, no traffic management scheme required. However, DSD may require permanent access road to be constructed.	Traffic management necessary along the 2-lane Ngong Ping Road and Tai O Road. No objection received from FSD or TD on the route.	Traffic management necessary along the 2-lane Ngong Ping Road and Keung Shan Road.		Tung Chung/Tai O, Tung Wan
Utilities	Surface drains, service duct, etc	Less constraints than for other routes	Surface drains, service duct, etc.	Surface drains, service duct, etc.		Tung Chung
Construction Time	Short pipe length and good site access allows the use of more effective machinery. However, traffic management at 1-lane Sham Wat Road would require construction at restricted hours which may increase the overall construction time.	Slow due to poor access to site or need to improve access	Fast progress along main roads due to good site access which allows the use of more effective machinery.	Fast progress along public main roads due to good site access which allows the use of the effective machinery.		Tai O/Tung Wan
Health Risk	High level treatment required to satisfy concerns over potential leakage of effluent pipeline, as a large section of the pipeline is within WGG with streams flowing in the direction of Shek Pik Reservoir.	High level treatment required to satisfy concerns over potential leakage of effluent pipeline, as a large section of the pipeline is within WGG with streams flowing in the direction of Shek Pik Reservoir.	High level treatment required to satisfy concerns over potential leakage of effluent pipeline, as a large section of the pipeline is within WGG with streams flowing in the direction of Shek Pik Reservoir.	Close proximity to Shek Pik Reservoir; concerns on the effect of any leakage of the pipe on the water of the reservoir. High level treatment required to satisfy concerns over potential leakage of effluent pipeline.		Tai O/Tung Chung/ShamWat
Interface with other projects	No major interfacing issues identified.	No major interfacing issues identified.	No major interfacing issues identified	No major interfacing issues identified.		No clear preference
ECONOMIC/FINANCIAL CRITERIA
Capital Cost	High because additional access road required. Widening of Shum Wat Road may be required.	High because additional access road required.	No new access road required but relatively longer route.	No new access road required. Need to install additional pipe leakage collection and monitoring systems within the Lower Direct Gathering Ground as required by WSD.	Tai O/Tung Wan

2.6.2 The other options at Tai O were considered to be less favourable for the following reasons:

2. Discharge to the creek at the bridge next to the fire station at a location influenced by tidal effects (Location 2 on Drawing No. 23400/EN/032), via the existing storm drain outfall or a new separate outfall, would be inferior to the selected site as it would provide less dispersion;
3. Options for discharge to the tidal creek further upstream (e.g. Location 3 on Drawing No. 23400/EN/032) were rejected for reasons similar to Option 2 above. It should be noted that the locations recommended in Options 2 and 3 are further upstream in comparison with the selected option and the water at these areas is much shallower which would provide less dispersion. Options for discharge to the stream were also rejected because of the seasonal nature of the flow in the stream;
4. Discharge to marine waters at the western end of Tai O Island outside the old Tai O police station (Drawing No. 23400/EN/031) would require a crossing of Tai O creek, construction work through Shek Tsai Po village and a much longer length of effluent pipeline;
5. Discharge to marine waters to the west of Fan Kwai Tong (Drawing No. 23400/EN/031) would require construction work alongside the salt pans and through Nam Chung Tsuen and Fan Kwai Tong villages and a longer length of effluent pipeline. The discharge would be close to secondary contact recreation zones and close to the proposed breakwater of the sheltered boat anchorage. This option also suffers from a lack of good existing access to the discharge point;

6. Discharge close to the existing sewage outfall location at the north end of Tai O island though:

	an option via an effluent pipe through Tai O Town, following the alignment of the existing Tai O sewers was rejected due to construction constraints in the congested village paths within Tai O Town as well as the much longer pipeline length required;
	an option via a new route along the village paths of Hang Mei before crossing the Creek to connect to the Tai O STW outfalls was considered undesirable as the alignment would pass through private land and alongside two disused salt pans, which are designated conservation areas under the Tai O revitalization study, as well as the much longer pipeline length required.

7. Discharge to the Tai O sewerage system would require mixing of treated Ngong Ping effluent with Tai O raw sewage. This would lead to inefficiencies in pumping and sewage treatment. It would also require either an effluent overflow for peak flow conditions or an upgrade of the trunk sewerage system through Tai O, which as noted above would be undesirable due to construction constraints in the congested village paths within Tai O Town.

2.7 Recommended Sewerage Master Plan for Ngong Ping

2.7.1 The recommended sewerage master plan for Ngong Ping is shown in Drawing No. 23400/R/G/001 and is summarised below:

1. construct a sewerage system to collect wastewater from the public toilets, the Po Lin Monastery, the proposed cable car terminal and associated commercial areas; village houses and the Youth Hostel. The layout is shown in Drawings No. 23400/R/VS/001-  002.
2. construct a sewage treatment works at the site shown in Drawing No. 23400/R/VS/002. The treatment works should incorporate emergency effluent storage facilities. Layout is shown in Drawing No. 23400/R/ST/013. Tertiary treatment will be incorporated into the process for the following reasons:

	to ensure that the WQO for suspended solids is achieved within a short distance of the discharge point;
	to provide even greater security against failure of the effluent pipeline;
	as a precautionary measure in view of uncertainties such as:
	future flow rate;
	any unexpected effects from the proposed sheltered boat anchorage breakwater on conditions in Tai O creek; and
	the potential continuing effects of the stilted houses at Tai O.

3. construct effluent export pipeline to Tai O, with discharge of disinfected tertiary effluent at the western end of the creek adjacent to the existing stormwater pumping station.