For inspection purposes only. Consent of copyright owner

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Kerry County Council – Waste Water Discharge Licence Application for Fenit Agglomeration. ___________________________________________________________________________________

_____________________________________________________________________

Assessment of Impact on receiving Surface or Ground Water EXISTING ENVIRONMENT SPECIAL AREA OF CONSERVATION (SAC) AND NATIONAL HERITAGE AREA (NHA) As can be seen from Figure 6.2, parts of the coastline around Fenit are designated as Special Areas of Conservation (SAC), National Heritage Areas (NHA) and candidate Special Protection Areas (SPA). The SAC/NHA site, named as Akeragh, Banna And Barrow Harbour (Code 000332) covers a 10km section of the coastline and includes a wide diversity of habitats. The site is protected primarily due to the presence of rare flora and its use as a wintering site for wildfowl.

Figure 6.2: Special Areas for Conservation (SAC), National Heritage Area (NHA) and Special Protection Area (SPA) at Fenit

As detailed in the 2006 Local Area Plan for Fenit and shown on Figure 6.2, “Land to the north west of the plan area, which includes Barrow Harbour and Fenit Island is designated as a Special Protection Area under the European Communities (Natural Habitats) Regulations 1997. An SPA is specifically intended to provide for the protection of bird life. The majority of this area is also designated as a candidate Special Area of Conservation, as is the sea surrounding Fenit with the exception of the stretch from Locke’s Beach to the diving boards. This designation is due to the presence of habitats and species protected in the European Communities (Natural Habitats) Regulations 1997. SPA’s and SAC’s will together form part of the ‘Natura’ 2000 network of protected areas throughout the European Community. The same areas of land are also designated as proposed National Heritage Areas. This designation provides for the protection of wildlife through the preservation of their habitats. The formal designation of NHAs has commenced”.

Attachment F.1

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_____________________________________________________________________ Attachment F.1

The proposed discharge via the existing outfall impinges on the protected areas. The location of a treatment plant at the existing site, whilst not contained within the protected areas, may impact on the habitats in question. It is a requirement of the Habitats Directive 92/43/EEC that “any plan or project not directly connected with or necessary to the management of the site but likely to have a significant effect thereon…shall be subject to appropriate assessment of its implications for the site in view of the site’s conservation objectives”. A more extensive assessment is, therefore, considered necessary to determine the impact that discharge of treated wastewater and the provision of a new treatment facility might have on the SAC/NHA.

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SITE SYNOPSIS

SITE NAME: AKERAGH, BANNA AND BARROW HARBOUR SPA

SITE CODE: 004079

Situated in north Co. Kerry the site extends for approximately 11 km from

Ballyheigue in the north to Fenit in the south. A good diversity of coastal habitats

occur, especially shingle and sandy beaches, salt marshes, sand dunes and intertidal

sand and mud flats, but also rocky shore, dry grassland, wet grassland and reed beds.

Akeragh Lough, formerly a brackish lagoon, has silted up since the 1970s and is now

mostly wet grassland and swamp vegetation. Barrow Harbour is a highly sheltered

inlet and provides particularly useful feeding and roosting habitat for the wintering

waterfowl. Carrahane Strand is a sandy inlet with salt marshes. The site is underlain

by limestone. The sandy soils are generally calcareous in nature and have a high shell

fragment content.

The sand dune system at the site is of particular note as the largest proportion of it

comprises fixed dune grassland. The vegetation is made up of a mosaic of Marram

(Ammophila arenaria) tussocks interspersed with low-lying patches of a Red Fescue-

Lady’s Bedstraw (Festuca rubra/Galium verum) community. Mobile Marram dunes

occur as a narrow band running along the seaward side of the entire coastal strip. The

main ridges reach heights in excess of 20 m in places. Also occurring are embryonic

dunes, with such species as Sand Couch (Elymus farctus) and Sea Rocket (Cakile

maritima). Of ecological interest is the gradation from fixed dune and dune slack to

salt marsh at Carrahane. Salt marsh,both here and at Barrow Harbour, is particularly

well-developed. Common salt marsh species include Thrift (Armeria maritima), Sea

Plantain (Plantago maritima), Saltmarsh Rush (Juncus gerardi) and Sea Rush (Juncus

maritima). Glasswort (Salicornia spp.) occurs on the edges of the salt marsh and in

sheltered areas extends onto the intertidal muds. Akeragh Lough, once a brackish

lagoon with much open water, now supports extensive areas of brackish vegetation.

The lake level is controlled by a sluice on the outflow, the total water area has

declined. Peaty land to the east if the lough has been afforested.

The Akeragh Lough, Banna Strand and Barrow Harbour SPA is an integral part of the

larger Tralee Bay complex and for most species there is regular commuting to other

parts of the bay outside of the site. It supports an internationally important population

of Brent Goose (1,741), with nationally important numbers of a further eight species,

i.e. Golden Plover (5,544), Wigeon (2,475), Ringed Plover (397), Lapwing (3,851),

Sanderling (200), Dunlin (2,182), Bar-tailed Godwit (191) and Turnstone (268) – all

figures are average peaks for two of the five seasons 1995/96-1999/00. A range of

other species occur in smaller numbers, including Shelduck (45), Teal (119), Mallard

(432), Oystercatcher (539), Knot (44), Black-tailed Godwit (43), Curlew (502),

Redshank (195), Greenshank (26), Common Gull (353) and Black-headed Gull (767).

There are no significant threats to the wintering birds though recreational activities

may cause some disturbance.

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The site is very important for a range of wintering birds, with Brent Goose occurring

in numbers of international importance and a further eight species in numbers of

national importance. The regular occurrence of Golden Plover and Bar-tailed Godwit

is of particular note as these species are listed on Annex I of the E.U. Birds Directive.

When considered with the remainder of Tralee Bay, this wetland complex is one of

the most important in the south-west region.

19.8.2004

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SITE SYNOPSIS

SITE NAME: TRALEE BAY SPA

SITE CODE: 004018

This site comprises the southern sector of inner Tralee Bay. It receives the flow of the

River Lee, which passes through Tralee town, and also a number of other rivers which

flow off the Slieve Mish Mountains. The site comprises mainly intertidal flats, which

are well sheltered by a sandy peninsula (Derrymore Island) that is also within the site.

The intertidal sediments vary from muddy sands on the upper shore to firm rippled

sands on the lower, more exposed shore. The sediments have a diverse macro-

invertebrate fauna, with such species as Cockle (Cerastoderma edule), Lugworm

(Arenicola marina), Ragworm (Hediste diversicolor), Baltic Tellin (Macoma

balthica) and Shrimp (Crangon crangon). The intertidal flats have extensive Eelgrass

(Zostera spp.) beds. Salt marshes, sand dunes and sandy beaches are well represented

at Derrymore Island.

The SPA is an important estuarine site for wintering waterfowl and is an integral

part of the larger unit of Tralee Bay. It supports an internationally important

population of Brent Goose (301) and a nationally important population of Ringed

Plover (184) (figures given are average peaks for 3 of the 5 winters in the 1995/96-

1999/00 period). At times, the population of Grey Plover (66) exceeds the

threshold for national importance. A range of other species occurs, including

Shelduck (103), Wigeon (301), Teal (176), Mallard (70), Pintail (12), Scaup (23),

Red-breasted Merganser (7), Oystercatcher (288), Lapwing (167), Knot (55),

Dunlin (557), Curlew (119), Redshank (165), Greenshank (9), Pintail (12) and

Turnstone (57).

The site provides excellent feeding grounds for the wintering birds, with the

eelgrass being of particular importance for the Brent Geese. The salt marshes and

sandy beaches associated with Derrymore Island provide high tide roosts. Birds

commute to other parts of the bay (outside of the SPA) and also to nearby Barrow

Harbour.

Much of Tralee Bay SPA is a Statutory Nature Reserve and there appear to be no

serious threats to the wintering birds. However, the intertidal areas receive

somewhat polluted water via the River Lee and there may be some disturbance

from walkers, free-running dogs, sailing activities and bait-digging.

This site is of high ornithological importance as it supports an internationally

important population of Brent Goose and a nationally important population of at

least one further species, Ringed Plover. It is an integral part of the larger unit of

Tralee Bay. The wintering birds are monitored annually as part of the I-WeBS

scheme.

13.8.2004

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SITE SYNOPSIS

SITE NAME : AKERAGH, BANNA AND BARROW HARBOUR

SITE CODE : 000332

This is a large coastal site covering a 10km section of coastline in County Kerry, and

including a wide diversity of habitats. The underlying rock is limestone, which

outcrops only in the southern part of the site, in the impressive columns and hillsides

north of Fenit. Elsewhere shell sand is predominant with occasional development of

peat.

A number of coastal habitats which are listed on Annex I of the EU Habitats Directive

are contained within the site. Sand dunes run southwards from Ballyheigue and they

become especially interesting south of the Akeragh outflow where they show great

variety in both physiography and vegetation. The largest proportion of the sand dune

system is fixed dune grassland. The vegetation is made up of a mosaic of Marram

(Ammophila arenaria) tussocks interspersed with low-lying patches of a Red Fescue-

Lady’s Bedstraw (Festuca rubra/Galium verum) community. Other species occurring

Smooth Meadow-grass (Poa pratensis), Daisy (Bellis perennis), Ribwort Plantain

(Plantago lanceolata) and Bulbous Buttercup (Ranunculus bulbosus). There is a

sparse occurrence of moss species, including Brachythecium rutabulum, Tortula

ruralis ssp. ruraliformis and Homalothecium lutescens. These tend to be restricted to

areas close to rabbit burrows, where they are associated with species such as

Germander Speedwell (Veronica chamaedrys), Squinancywort (Asperula cynanchica)

and Dog Lichen (Peltigera spp.). A number of other species typical of Mesobromion

grasslands are found in this habitat type, reflecting the calcareous nature of the site.

These include Pyramidal Orchid (Anacamptis pyramidalis), Thyme-leaved Sandwort

(Arenaria serpyllifolia) and Hairy Rock-cress (Arabis hirsuta). Common Dodder

(Cuscuta epithymum), a parasitic plant, grows in abundance on the fixed dune slopes

at Carrahane. Mobile Marram dunes occur as a narrow band running along the

seaward side of the entire coastal strip. There is a slight increase in dune mobility

towards the growing tip at Carrahane. The main ridges are dominated by Marram and

reach heights in excess of 20m in places. Companion species include Sea Spurge

(Euphorbia paralias), Colt’s-foot (Tussilago farfara), Sea holly (Eryngium

maritimum) and Sand Sedge (Carex arenaria). Also occurring are embryonic dunes,

with such species as Sea Couch (Elymus farctus) and Sea Rocket (Cakile maritima).

The site contains a number of dune slack areas, these being best developed on the

landward side of Carrahane dunes. Species present in these dune slacks include

Common Bent (Agrostis stolonifera), Red Clover (Trifolium pratense), Glaucous

Sedge (Carex flacca), Water Mint (Mentha aquatica), Creeping Willow (Salix repens)

and the scarce, Marsh Helleborine (Epipactis palustris).

Of ecological interest is the gradation from fixed dune and dune slack to salt marsh at

Carrahane. Salt marsh here is particularly well developed but also occurs at Barrow

Harbour. Common salt marsh species include Thrift (Armeria maritima), Red Fescue,

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Sea Plantain (Plantago maritima), Saltmarsh Rush (Juncus gerardi) and Sea Rush

(Juncus maritima). A number of scarce species are associated with the salt marsh,

notably Hard-grass (Parapholis strigosa), Saltmarsh Flat-sedge (Blysmus rufus),

Strawberry Clover (Trifolium fragiferum) and a special Sea Lavender (Limonium

recurvum). Glasswort (Salicornia spp.) occurs on the edges of the salt marsh and in

sheltered areas extends onto the intertidal muds.

Akeragh Lough now supports extensive areas of brackish vegetation. It was formerly

richer in birdlife, but the lake level has been controlled by a sluice on the outflow, the

total water area has declined and the peaty land to the east has been afforested. The

site supports important wintering waterfowl populations. Brent Geese occur in

internationally important numbers (360 in winter 1996/97), while in winter 1996/97

nationally important populations of Ringed Plover (130), Grey Plover (62), Lapwing

(c.2000), Sanderling (280) and Bar-tailed Godwit (345) occurred. Notable

populations of Golden Plover, Oystercatcher, Dunlin, Curlew and Redshank also

occur. The regular occurrence of Golden Plover and Bar-tailed Godwit is of note as

these species are listed on Annex I of the EU Birds Directive.

The harbour is surrounded by low hills of limestone which support an interesting

grassland community where they remain unfertilised. This is best seen at the entrance

to Carrahane Bay but recurs sporadically elsewhere. Some dry heath also occurs.

This large site is of major ecological interest due both to its range of floristically-rich

coastal habitats and as a wintering site for significant numbers of waterfowl.

4.11.2001

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_____________________________________________________________________

Compliance with Council Directives PROGRAMME OF IMPROVEMENTS INTRODUCTION The proposed scheme is intended to provide a wastewater infrastructure that will adequately cater for the future demand from the village of Fenit in the design horizon 2006-2026. The scheme will provide separate foul and storm networks and remove as much of the surface water from the existing network as is practicable, whilst using sections of the existing combined system to cater for foul flows only. The completion of the network shall be split into two (2) phases the layout for which is indicated on Drawings 02 and 03 with longitudinal sections provided on Drawings 05 to 09. Phase 1 will cater for the existing population. Phase 2 will facilitate future development within the development boundary as determined in Section 4.2. The existing scheme manhole numbering system referred to in Section 3 and indicated on Drawing No. 01 had been devised from record drawings and sketches that were compiled throughout its construction. This system is considered ambiguous for describing the proposed network and consequently a revised numbering system for the proposed foul and storm sewers described in this chapter has been developed for the purposes of clarity (Refer to Drawing. No. 02 and 03). The proposed works for each individual catchment area (1 to 4) are described in the following sections. PROPOSED FOUL NETWORK – PHASE 1 In addition to catering for future arisings from the area within the defined development boundary, remedial works on the existing system that were identified in Section 3 will also be attended to as part of the proposed network improvements. The following should be read in conjunction with Drawing No. 02. Remedial Works to Existing Network – Catchment 1 The remedial works and network improvements include: 1. Replacing all existing 100mm or 150mm diameter sewers with 225mm pipework with

the exception of the sewer from Mh. 15f to Mh. 15c, which is laid through private gardens. This section shall be relined and retained as it is anticipated that its replacement would result in significant disruption to the landowners.

Table 5.1 lists the specific 100/mm150mm diameter sewer runs that are intended to be replaced as part of Phase 1 of the scheme.

Table 5.1 Upsize to 225 mm Diameter – Catchment 1

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_____________________________________________________________________

* Refers to current manhole designation- Ref Section 3 2. Repairing existing sewers where the defects that were identified by the CCTV survey

are considered minor and where capacity exists to accommodate future flows. Table 5.2 lists the sections of sewers and notes the defects that shall be repaired by means of patching, relining or removal of protruding laterals using systems that do not require excavation and removal of pipework.

Table 5.2: Refurbishment of Existing Sewers – Catchment 1

* Refers to current manhole designation- Ref Section 3 3. Replacing existing sewers where the defects that were identified by the CCTV survey

are considered major and beyond repair.

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_____________________________________________________________________

The survey determined that the condition of the sewer between Mh. F34 and Mh. F40 (MhF5- MhF0.2)* is reasonable. However, the sewer is laid at very flat gradients (up to 1/1072) resulting in siltation .and debris in the pipe inverts due to poor velocities. Consequently it is proposed to replace the existing 400mm AC pipe from Mh. F34 with a 450mm diameter pipe to the levels shown on the longitudinal section on Drawing 05. Table 5.3 lists the sections that are recommended for replacement.

Table 5.3: Replacing Existing Sewer Runs- Catchment 1

* Refers to current manhole designation- Ref Section 3 Foul Sewer Extensions – Catchment 1 The extent of the collection system caters for all existing development from within catchment 1 and consequently there are no foul sewer extensions recommended as part of Phase 1 works. Additional Works – Catchment 1 The remedial work described above provides capacity in the system to cater for the predicted future loadings from within catchment 1. However, the proposals for catchment 3 include for the redirection of the existing 150mm diameter rising main from PS3 to Mh. F15d in catchment 1. Consequently, it is required to replace the existing 225mm diameter sewer from Mh. F15d to Mh. F15 with a 300mm diameter sewer to facilitate the additional flows (existing and future) from catchment 3.

Table 5.4: Proposed Sewer Upgrades – Catchment 1

* Refers to current manhole designation- Ref Section 3 Remedial Works to Existing Network – Catchment 2 The remedial works and network improvements include: 1. Replacing existing 150mm diameter sewers with 225mm pipework. Table 5.5 lists the

specific sewer runs included.

Table 5.5: Upsize to 225 mm Diameter – Catchment 2

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_____________________________________________________________________

* Refers to current manhole designation- Ref Section 3 2. Repairing existing sewers where the defects that were identified by the CCTV survey

are considered minor (where capacity exists to cater for future flows). Table 5.6 lists the sections of sewers and notes the defects that shall be repaired by means of patching, relining or removal of protruding laterals using systems that do not require excavation and removal of pipework.

Table 5.6: Refurbishment of Existing Sewers - Catchment 2

3. Replacing existing sewers where the defects that were identified by the CCTV survey

are considered major and beyond repair. Table 5.7 lists the sections that are recommended for replacement.

Table 5.7: Replacing Existing Sewer Runs- Catchment 2

* Refers to current manhole designation- Ref Section 3 Foul Sewer Extensions – Catchment 2 The extent of the collection system caters for all existing development from within catchment 2 and consequently there are no foul sewer extensions recommended as part of Phase 1 works. 5.2.6 Additional Works – Catchment 2 The existing pump station in catchment 2 (PS2) is to be decommissioned and replaced with a new package pump station to cater for existing and future flows. 5.2.7 Remedial Works to Existing Network – Catchment 3 1. Replacing existing 150mm diameter sewers with 225mm pipework. Table 5.8 lists the

specific sewer runs included.

Table 5.8: Upsize to 225 mm Diameter - Catchment 3

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_____________________________________________________________________

2. Repairing existing sewers where the defects that were identified by the CCTV survey

are considered minor (where capacity exists to cater for future flows). Table 5.9 lists the sections of sewers and notes the defects that shall be repaired by means of patching, relining or removal of protruding laterals using systems that do not require excavation and removal of pipework.

Table 5.9: Refurbishment of Existing Sewers - Catchment 3

* Refers to current manhole designation- Ref Section 3 3. Replacing existing sewers where the defects that were identified by the CCTV survey

are considered major and beyond repair. Table 5.10 lists the sections that are recommended for replacement.

Table 5.10: Replacing Existing Sewer Runs - Catchment 3

* Refers to current manhole designation- Ref Section 3 Foul Sewer Extensions – Catchment 3 12 houses on Nolan’s Hill are presently serviced by individual septic tanks. It is proposed to lay a new sewer to service 8 of these houses and to connect to the proposed network at Mh. F70a. Table 5.11 lists the specific details.

Table 5.11: Foul Sewer Extension - Nolan’s Hill

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_____________________________________________________________________

It is proposed to locate Mh 70e at the high point on the hill although this will not facilitate discharges from the remaining 4 houses. It is proposed to collect flows from these houses in conjunction with the development of sites to the south as part of Phase 2 works. Additional Work – Catchment 3 The existing overflow from Mh. F89 (Mh. 52)* is to be decommissioned and a new 300mm

diameter sewer constructed from Mh.F89 to Mh. F90 (Mh. 52 – Mh. 51)*. The existing Pump Station (PS3) is to be decommissioned and replaced with a new

package pump station. The existing rising main from PS3 connects to Mh. F7 (Mh. 15)* and gravitates in a

common sewer through private residences until it reaches Mh. F15 (Mh. 13)* on the main road. The condition of the common sewer, based on information from the CCTV survey, is quite poor. In addition routing sewer runs through private land is not desirable as it may lead to access and ongoing maintenance difficulties. To resolve both issues it is proposed to re-route the rising main through Castleview Estate and connect to Mh. F15d. (590m)

The condition of the sewer between Mh. F68 and Mh. F93 (Mh. 43 and Mh. 48a)* was not

investigated due to access difficulties. Although further investigation is warranted, for the purpose of this report it is assumed that this section shall require replacing and the costs for this have been included in section 7. This is considered to be a reasonable assumption given the poor condition of the A.C pipe network in general.

Refers to current manhole designation- Ref Section 3 *

emedial Works to Existing Network – Catchment 4 R

The location of the network between Mh. F43 (Mh. 056)* and the existing WWTP was not established and therefore the condition of the pipe was not determined. It is recognised that further investigation is required in order to determine this information and allow a decision to

e made in relation to retaining or repairing this section of sewer. b However, for the purposes of this report it is assumed that replacement of this sewer is necessary and the costs associated with the replacement are included in section 7. This is considered to be a reasonable assumption given the poor condition of the A.C pipe network in

eneral. g

UMMARY OF PROPOSED IMPROVEMENTS TO FOUL NETWORK –PHASE 1 S Improvements to the foul network which have been identified in previous sections for all four catchments are summarised in the following Tables 5.12 and 5.13 .It is anticipated that these mprovements will be completed as part of Phase 1 works i

Table 5.12 Repairs to Existing Sewer Runs

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_____________________________________________________________________

Table 5.13 New Sewer Runs –Phase 1

PROPOSED FOUL NETWORK – PHASE 2 The proposed Phase 1 network will cater for the existing population and have sufficient capacity to cater for the projected 2026 population. Included within the development boundary are large areas of developable land that can be serviced by gravity sewers connecting to the proposed Phase 1 network (i.e. Chaplestown road). However, the topography of the village and surrounding area dictates that a number of pumping stations will be required to discharge flows from the low-lying areas into manholes on the proposed Phase 1 network.

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_____________________________________________________________________

Drawing No. 02 shows indicative layouts of Phase 2 trunk sewers and associated pump stations. The extent of the Phase 2 works is summarised in the following Table 5.14: -

Table 5.14 Phase 2 Foul Sewers

The proposed rising main discharge manholes from the phase 2 pump stations (A – D) are indicated on Drawing No. 02 and shown in Table 5.15.

Table 5.15 Phase 2 Pump Station Discharge Manholes

It is expected that prospective developers will be required to provide Phase 2 foul sewers or to pay a contribution to Kerry Co Council for their construction and consequently the associated costs are not included in the estimated costs for the scheme detailed in Section 7. PROPOSED STORM NETWORK The completion of the storm network shall be split into two (2) phases. Phase 1 will cater for the existing population with sufficient surplus capacity to cater for the projected 2026 population. Phase 2 will facilitate future development within the development boundary determined in Section 4.2. The layout of the proposed network is shown on Drawing No 03 with longitudinal sections provided on Drawings No. 08 and 09. Proposed Storm Network – Phase 1 The proposed Phase 1 storm system is split into 3 separate catchments, A, B & C with 3 individual outfall points as shown on Drawing No. 03. These sewers are to be laid on existing roads that facilitate existing development and consequently they shall be constructed as part of Phase 1. It is anticipated that attenuation of storm flows prior to outfall will not be required, as the discharge at the proposed outfall locations (at the beach and Fenit Harbour) will not have any flooding impact on the village.

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It is recommended however that all new surface water outfalls incorporate a hydrocarbon separator and grit trap prior to discharging to receiving watercourses. Catchment A With reference to Drawing No 03 and the area designated as Catchment A, it is proposed to construct a storm collection system to cater for run-off from areas within the existing developed area, and with sufficient capacity to accommodate additional flow from future developments. The proposed system consists of pipes ranging from 225 mm to 750 mm in diameter. A plan of the proposed system is provided on Drawing No. 03 with details listed in Table 5.16 below and longitudinal sections indicated on Drawing 08. Castleview Estate and adjoining undeveloped land falls away from the existing road and therefore was not included in the design of the Catchment A system. It is anticipated that storm flows from the estate will be picked up when development takes place in the phase 2 area to the North.

Table 5.16 Proposed Catchment A Storm Sewers

Catchment B With reference to Drawing No. 03 and the area designated as Catchment B, it is proposed to construct a storm collection system to cater for run-off from areas within the existing developed area, and with sufficient capacity to accommodate additional flow from future developments. The proposed system consists of pipes ranging from 300mm to 375mm in diameter. A plan of the proposed system can be seen on Drawing No. 03 with details of the collection system listed in Table 5.17 below and longitudinal sections shown on Drawing No. 08.

Table 5.17 Proposed Catchment B Storm Sewers

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Catchment C With reference to Drawing No. 03 and the area designated as Catchment C, it is proposed to construct a storm collection system to cater for run-off from areas within the existing developed area, and with sufficient capacity to accommodate additional attenuated flow from future developments. The proposed system consists of concrete pipes ranging from 225 mm to 750 mm in diameter. A plan of the proposed system is provided on Drawing No. 03 with details listed in Table 5.18 below and longitudinal sections indicated on Drawing 09.

Table 5.18 Proposed Catchment C Storm Sewers

Proposed Storm Network – Phase 2 The topography of the land within the development boundary and its coastal location allows a number of possible outfall points to be considered in order to facilitate storm water runoff from future development. Sewer details and points of discharge to cater for Phase 2 developments are dependent on finalised layouts details of which are not presently available and consequently, with the exception of areas marked D5-D7 incl. and C1-C4 incl. on Drawing 03, no specifics are included herein. It is anticipated that un attenuated flows from Area D on Drawing 03 will discharge to a proposed 450- 600 mm sewer from Mh S40-S46 and then to sea at outfall point 04. It is recommended that all new surface water outfalls incorporate a hydrocarbon separator and grit trap prior to discharging to receiving waters. An allowance has been included in the design of the storm sewers Mh S03-Mh S07and MhS16- MhS10, such that the Areas marked C1-C4 on Drawing 03 can, once developed,

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discharge to the proposed system at a rate equivalent to the existing contributing flow in an undeveloped (Greenfield) state. It is expected that the Kerry County Council will stipulate that development from these areas will require the use of SUDS or some form of stormwater attenuation prior to connecting to the system. Estimates of the allowable runoff from each area are given in Table 5.19 below with the proposed points of discharge also identified.

Table 5.19: Allowable Discharge from Future Developed Areas

It is anticipated that storm sewers will be completed in conjunction with the development of Phase 2 lands. It is expected that prospective developers will be required to provide these storm sewers or to pay a contribution to Kerry Co Council for their construction. Consequently the associated costs are not included in the estimated costs for the scheme detailed in Section 7. GENERAL The proposed wastewater treatment plant is intended to cater for an ultimate population equivalent of 3,312. It is proposed to construct the treatment plant in two phases with the initial phase catering for a population equivalent of 2,000. WASTEWATER TREATMENT LOAD The design criteria for the new treatment plant are set out in Table 6.1 below.

Table 6.1 Design Basis

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Impact Mitigation Details of a programme of improvements are given in attachment G1.

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Storm Water Overflow Details of a programme of improvements including storm water management are given in attachment G1.

Attachment G.4

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