ATTACHMENT No: C.1 OPERATIONAL INFORMATION … · 2013-07-26 · 3.23m. The aerator is located in...

WWD Application Form V6/08

ATTACHMENT No: C.1

OPERATIONAL INFORMATION REQUIREMENTS

Kells WWTW Waste Water Discharge Licence Application

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C.1 Operational Information Requirements

General Plant Description

1.0 Introduction

The Kells Wastewater Treatment Plant, located on the Drogheda Road, is the

treatment plant for municipal wastewater arising from the town. The plant was

constructed in the 1980’s with a design capacity of 8,000 P.E. The collection

system for Kells includes a considerable number of combined sewers and three

pumping stations. Following treatment, the effluent is discharged by gravity

into the River Blackwater via an adjacent stream.

There are optimisation works proposed for the Kells Wastewater Treatment

Plant in 2009 including provision of a new storm tank and extending the outfall

pipeline to the River Blackwater. A major upgrade of the Kells Sewerage

Scheme is due to be carried out over the coming years. These upgrade works

are due to be complete in 2013. Further details are given in Attachment B10.

2.0 Description of Waste water treatment works

Inlet Works

The inlet pipework to the treatment plant is 225mm in diameter. All flows are

measured by way of an electromagnetic flowmeter on the inlet pipe. The pipe

terminates in a chamber provided with an overflow weir which is fitted with a

rough bar screen at 9mm openings. Currently, there is no storm tank available

to the Works and hence all overflowed influent being diverts directly to the

outfall stream.

The inflow to the works passes through a Hollung AS screen of 6mm spacings.

Following screening, the influent continues through a flume and on to a flow

splitting chamber with three gate valves, splitting the flow between the two

aeration tanks further downstream.

Aeration Tanks

The aeration tanks are both square tanks of side 19.4m, with a liquid depth of

3.23m. The aerator is located in the centre of the tank and aerates the

wastewater by means of three extended arms extending from the axis of the

machine. The agitated liquor passes to the clarifier through an adjustable weir.

There are two dissolved oxygen (DO) meters on-site.


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Clarifiers

The clarifiers on site are square in plan with a side length of 9m. They consist

of a relatively shallow upper portion having vertical walls, located over an

inverted pyramidal lower section with sides sloping at 60º to the horizontal.

Mixed liquor is fed from the centre of the tank via a diffuser drum, and settled

sludge is drawn from the central area of the base.

Final Effluent

The clarified final effluent overflows the clarifiers via ‘V’ shaped notches in the

overflow weir and is piped from the final manhole to a nearby stream which is

fed into the River Blackwater further downstream.

Sludge Treatment

An arrangement of pumps provides the operator with the option of either

returning return activated sludge (RAS) to the aerator, or wasting surplus

activated sludge (SAS) to the sludge plant.

The wasted sludge is pumped to a sludge holding tank, a 5m by 5m concrete

tank with a sloping floor. A surface aerator in the tank agitates the wasted

sludge before it is pumped to a 1,200mm dewatering belt press.

The sludge proceeds to the belt press via sludge pumps where it is dewatered

and the resulting cake is transferred to a skip by an Archimedes screw pump.

The filtrate gravitates back to the inlet works, where it discharges downstream

of the inlet screen.

C1.1 Pump Stations

There are 3No. pump stations in Kells as shown on drawing No 20285-DL-KS-01,

Attachment B1.

C1.1.1 Headfort Estate Pumping Station

The Headfort estate pumping station is located outside the town development

boundary. It is a privately owned pumping station provided for this estate only.

(drawing 20285-DL-KS-01, Attachment B1).

• There is one duty and one standby pump • There is no backup power supply in case of a power failure • There is no emergency/stormwater overflow at this pump station

C1.1.2 The Glebe Pumping Station

The Glebe pumping station is located within the Glebe housing estate. It is due to

be taken over by Meath Co. Co. within the next 6 months (drawing 20285-DL-KS-

01, Attachment B1).

• There is one duty and one standby pump


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• There is no backup power supply in case of a power failure • There is no emergency/stormwater overflow at this pump station

C1.1.3 Tobair Ban Pumping Station

Tobair Ban pumping station is located within the Tobair Ban housing estate

(drawing 20285-DL-KS-01, Attachment B1).

• There is one duty and one standby pump • There is no backup power supply in case of a power failure • There is no emergency overflow at this pump station

C1.2 Storm Water Overflows

C1.2.1 SW2 - Wastewater Treatment Works Storm water Overflow

Location: Tributary of the River Blackwater

National Grid Reference: E275162, N276162 Description:

The current layout of the inlet works contains an overflow facility that redirects

screened storm flows directly, without treatment, to join the primary discharge

pipe at the final effluent manhole prior to discharge to the river. The overflow

contains a course bar screen with openings of approximately 9mm. There is no

facility on site to record an overflow event or its duration. It is therefore not

possible to determine the frequency of storm flow events.

The Kells Optimisation Works is to include a storm storage tank. The storm tank

will be sized to accommodate up to at least 3 hours storage at 3 dry weather flow

(DWF).

The return of storm flows to the inlet of the works for treatment will be controlled

by pumps.

Compliance with the Department of the Environment Procedures and

Criteria in Relation to Storm Water Overflows:

The 95 percentile flowrate in the River Blackwater at the discharge point of the

overflow is: 0.5m3/s

The Dry Weather Flow to the wastewater treatment plant is 0.0234m3/s. The

dilution factor in the River Boyne is: 0.5 / 0.0234= 21.

The Urban Wastewater Treatment Directive 91/271/EEC states that there is no

required storage volume based on a dilution rate of >8.

As stated above the Kells Optimisation Works is to include a storm storage tank for

the works.


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C1.2.2 SW3 – Blackthorn Close Stormwater Overflow

Location: Tributary of the River Blackwater

National Grid Reference: E274661, N276076

Description:

There is a 225mmø open discharge Manhole 24 on the network. It discharges to a

small stream which leads to the river Blackwater. The number of overflows per

annum and overflow volume is unknown.

Compliance with the Department of the Environment Procedures and

Criteria in Relation to Storm Water Overflows:

Formula A, as detailed in Department of the Environment Procedures and Criteria

in Relation to Storm Water Overflows, relates to storm overflows within the

sewerage network. There is one storm overflow within the sewerage network as

detailed above.

P = design domestic population - Kells is approximately 6,160 PE

E = design industrial effluent flow – Kells is approximately 1,840 PE

DWF = Design dry weather flow – Kells = 2021.76 m3/day

Formula A = DWF + 1.36P + 2E

= (2021.76m3/day)+(1.36x6160)+(2x1840)

= 14,079.36 m3/day

The contributing population and overflow setting on the storm water overflow

(SW3) is currently unknown. This will be examined as part of the Kells Sewerage

Scheme upgrade.


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ATTACHMENT No: C.2

OUTFALL DESIGN AND CONSTRUCTION


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C.2 Outfall Design and Construction Provide details on the primary discharge point & secondary discharge points and

storm overflows to include reference, location, design criteria and construction

detail.

Primary discharge Point, Ref: PSW1 (E275135, N276203)

This discharge caters for the disposal of treated final effluent from Kells.

The treated effluent is conveyed from the final manhole to the stream adjacent to

the River Blackwater via a 525mm diameter pipe with flap valve. This is a gravity

line. The discharge type is to a small stream that leads to the River Blackwater.

As part of the Kells WWTW Optimisation works a new primary discharge pipeline

is to be constructed from the final effluent manhole directly to the River

Blackwater. This will provide a greater dilution factor and ensure a sufficient

waste assimilative capacity is available in the receiving waters.

Secondary discharge points

There are no secondary discharge points.

Storm Overflow Point, Ref: SW02 (E275162, N276162)

At the inlet works there is an overflow facility that redirects storm flows directly,

without treatment, to join the primary discharge pipe at the final effluent

manhole prior to discharge to the river. The overflow pipe is 525mmø. The

overflow contains a course bar screen with openings of approximately 9mm.

There is no facility on site to record an overflow event or its duration. It is

therefore not possible to determine the frequency of storm flow events.

Storm Overflow Point, Ref: SW03 (E274661, N276076)

There is a 225mmø stormwater overflow at Manhole 24. It discharges to a small

stream which leads to the river Blackwater. The number of overflows per annum

and overflow volume is unknown.


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ATTACHMENT No: D1

Discharge(s) to Surface Waters


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Meath Co.Co. Results for Kells WWTP samples (grab samples)

Date 04-Jan-08 20-Feb-08 26-Mar-08 08-Apr-08 07-May-08 06-Jun-08 02-Jul-08 06-Aug-08 02-Sep-08

Parameter Inf Inf Inf Inf Inf Inf Inf Inf Inf Average

BOD mg/l 203 174 174 233 213 337.81 286 193 215 225

COD mg/l 404 296 462 365 560 586 432 575 401 453

TSS mg/l 77 106 13 166 157 273 172 143 138

Tot P mg/l 5.29 6.81 6.16 5.69 8.34 9.67 8.44 4.87 3.85 7

Tot N mg/l 26.9 61 53 82.5 45.4 82 51.6 24.5 23.4 50


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ATTACHMENT No: D2

Emission Points


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Kells WWTW - Table D2PT_CD PT_TYPE LA_NAME RWB_TYPE RWB_NAME Designation EASTING NORTHING

PSW1 Primary Meath County Council

River Blackwater River (Kells)

SAC E275135 N276203

SW2 Stormwater Overflow Meath County Council


SAC E275160 N276163

SW3 Stormwater Overflow Meath County Council


SAC E274661 N276077

Receiving Water Body Name (e.g., River Suir)

Protected Area Type (e.g., SAC, candidate SAC, NHA, SPA etc.)

6E-digit GPS Irish National Grid Reference

6N-digit GPS Irish National Grid Reference

Point Code Provide label ID’s

Point Type (e.g., Primary/ Secondary/ Storm Water Overflow)

Local Authority Name (e.g., Donegal County Council)

Receiving Water Body Type (e.g., River, Lake, Groundwater,


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ATTACHMENT No: E3

Location of Monitoring and Sampling Points


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Kells WWTW - Table E3PT_CD PT_TYPE MON_TYPE Easting Northing VerifiedPoint Code Providelabel ID’s assignedin section E ofapplication

Point Type (e.g.,Primary, Secondary,Storm Water Overflow)

Monitoring Type M =Monitoring S =Sampling

6E-digit GPSIrish NationalGrid Reference

6N-digit GPS IrishNational GridReference

Y = GPS used N =GPS not used

PSW1 Primary Sampling 275137 276206 YaSW1u Primary Sampling 275103 276393 YaSW1d Primary Sampling 275899 275972 Y


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ATTACHMENT No: E4

Sampling Data

(Details of compliance with applicable monitoring requirements and treatment standards)


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Date 04-Jan-08 20-Feb-08 26-Mar-08 08-Apr-08 07-May-08 06-Jun-08 02-Jul-08 06-Aug-08 02-Sep-08

Parameter Inf Inf Inf Inf Inf Inf Inf Inf Inf Average

BOD mg/l 203 174 174 233 213 337.81 286 193 215 225

COD mg/l 404 296 462 365 560 586 432 575 401 453

TSS mg/l 77 106 13 166 157 273 172 143 138

Tot P mg/l 5.29 6.81 6.16 5.69 8.34 9.67 8.44 4.87 3.85 7

Tot N mg/l 26.9 61 53 82.5 45.4 82 51.6 24.5 23.4 50

Parameter Eff Eff Eff Eff Eff Eff Eff Eff Eff Average

BOD mg/l 1.45 4.6 7.7 2.2 3.35 3.7 11.3 4.88 2.65 4.6

COD mg/l 26.8 35.7 39.3 23.7 25.2 38.1 51.2 15.3 37.8 32.6

TSS mg/l 3.2 6.8 6.4 6 4.8 46.8 15.2 8.4 12.2

Tot P mg/l 1.59 2.68 2.72 3.1 1.83 4.16 6.14 3.68 1.74 3.1

Tot N mg/l 7.87 13.5 8.34 14.9 8.32 10.3 16.9 19.8 7.31 11.9


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ATTACHMENT No: F1

ASSIMILATIVE CALCULATIONS


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o Give summary details and an assessment of the impacts of any existing or proposed emissions on the environment, including environmental media other than those into which the emissions are to be made. The River Blackwater (Kells) is monitored upstream of the wastewater treatment plant at and Station No. 1100 (Bridge nr Carnaross) and Station No. 1200 (Mabe’s Bridge) and downstream at Station No. 1300 (Sedenrath Bridge). The water quality upstream of the wastewater treatment plant at Station No. 1200 was classified as Q3-4 in 2000 and 2003 and Q4 in 1997. The water quality downstream of the wastewater treatment plant was classified as Q3-4 in 2003 unchanged since 1997.

Monitoring data for the effluent from the primary discharge point is included in

Table D1 and monitoring data from monitoring points upstream and downstream

of the primary discharge point is included in Table F1.

o Tables F.1(i)(a) & (b) should be completed for the primary discharge point. Tables F.1 (i)(a) & (b) are completed for the primary discharge point

o For discharges from secondary discharge points Tables F.1(ii)(a) & (b) should be completed. Furthermore, provide summary details and an assessment of the impacts of any existing or proposed emissions on the surface water or ground (aquifers, soils, sub-soils and rock environment), including any impact on environmental media other than those into which the emissions are to be made. There are no secondary discharge points. Tables F.1 (ii)(a) & (b) are therefore

not completed.

There are no impacts on ground water or other environmental media. The impact

of the primary discharge point on the River Blackwater (Kells) is evaluated in the

Waste Assimilative Capacity calculations below.

Waste Assimilative Capacity Calculations

The treated effluent from the Wastewater Treatment Works in Kells discharges to

the River Blackwater (Kells). The effluent discharge standards from the

wastewater treatment plant have been reviewed in terms of the design population

equivalents of the works taking into account the most recent Biological Water

Quality Data published by the EPA for the River Blackwater (Kells). The closest

upstream chemical data for the River Boyne for 2001-2003 is at Station No.

1100, Bridge nr Carnaross. Chemical data for 2001-2003 is available for Station

No. 1300, Sedenrath Bridge. This data has been used in the waste assimilative

capacity calculations.


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The design capacity of the Kells Wastewater Treatment Plant is 8,000 PE.

However, it is likely that this PE will be exceeded prior to 2015. The plant design

is considered to be sufficiently robust to cater for loads of 10 to 15% above the

design capacity without any derogation of the effluent standards. The waste

assimilative capacity calculations have been carried out using a population

equivalent of 9,000 PE and corresponding effluent loads from this PE. This is to

ensure that the capacity of the receiving waters is sufficient at population

equivalent up to 9,000 PE.

The primary regulatory guidelines for effluent standards, as outlined in Section 2,

are the Urban Wastewater Treatment Regulations, 2001 (S.I. 254 of 2001) and

the Water Quality Standards for Phosphorus (S.I. 258 of 1998). The water

quality requirements are dependent on the background values and the flow in the

river (i.e. assimilation capacity).

The biological quality ratings for the River Boyne upstream and downstream of

the existing wastewater treatment plant are detailed in Table 1.

TABLE 1 BIOLOGICAL QUALITY RATINGS (Q VALUES) FOR RIVER BOYNE

Year Location Station

Number Station Name 1997 2000 2003

1997 2 2000 2003

2000 1997 2000 2003

2003 Upstream 1100 Bridge nr Carnaross 4 4 3-4

Upstream 1200 Mabe’s Bridge 4 3-4 3-4

Downstream 1300 Sedenrath Bridge 4 3-4 3-4

Chemical data presented in the EPA report for Water Quality in Ireland 2001 to

2003 is as follows:

TABLE 2 CHEMICAL DATA FOR RIVER BOYNE (2001 – 2003)

Parameter Concentration (mg/l)

Upstream –

Station No. 1100

Downstream

Station No. 1300

BOD 2.5 2.4

Ortho-phosphate P 0.03 0.04

Ammonia N 0.03 0.05

Oxidised nitrogen N 1.4 1.9


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The flowrates in the River Boyne (EPA Hydrological data) and dilution factors of

the effluent from the wastewater treatment plant are detailed below:

Table 3 Dilution Factors at 95 Percentile River Flow

River flow

95 Percentile

(m3/s)

WWTP Flow

(m3/s)

Dilution

(FRiver/FWWTP)

At dry weather flow to the WWTP 0.5 0.0234 21.3

At peak flow to the WWTP (3 DWF) 0.5 0.0703 7.1

Table 4 Dilution Factors at Average River Flow

River flow

Average

(m3/s)

WWTP Flow

(m3/s)

Dilution

(FRiver/FWWTP)

At dry weather flow to the WWTP 8 0.0234 341.3

At peak flow to the WWTP (3 DWF) 8 0.0703 113.8

The waste assimilative capacity for BOD5 is calculated using the 95 percentile flow

as the requirement for compliance with the Urban Wastewater Treatment

Regulations only one sample in 12 can exceed the maximum value.

Compliance with nitrogen and Ortho-phosphate P requirements is based on an

annual average and therefore the average river flowrate has been used for these

calculations.

The waste assimilative capacity for BOD, ammonia, orthophosphate and oxidized

nitrogen are calculated below. There are no limits of COD or total phosphorous or

total nitrogen in terms of water quality in the salmonid regulations or bathing

water regulations.

There is a limit of suspended solids at average concentrations of 25mg/l in the

salmonid regulations. The level of suspended solids in the effluent from the

wastewater treatment plant is 35mg/l. The minimum dilution in the river at 95

percentile flow in the river and peak flows from the wastewater treatment plant is

32. The suspended solids will therefore increase by a maximum of (35/7.1) =

4.9mg/l. Over a daily flow the increase in suspended solids will be substantially

less and therefore the effluent limit of 35mg/l is considered acceptable.


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It has been assumed that if the requirements of the Urban Wastewater Treatment

Regulations are met and the waste assimilative capacity for the other parameters

is sufficient that the effluent COD, suspended solids, total nitrogen and total

phosphorus will be acceptable.

It should be noted that the effluent flows have not been included in the WAC

calculations below and therefore there will be additional dilution to that calculated

below.

The waste assimilative capacity for the river is calculated as follows:

Biochemical Oxygen Demand

BOD WAC = (Cmax – Cback) x F95 x 86.4

Where Cmax = max. allowable BOD concentration (mg/l) = 4 mg/L

F95 = 0.5 = 95 percentile flow in m3/sec

Cback = background BOD concentration (mg/l) = 2.5mg/L

86.4 = conversion factor (to kg/day)

BOD WAC = (4 – 2.5) x 0.5 x 86.4 = 64.8 kg.BOD5/day

This formula provides an assimilative capacity for the river of: 64.8 kgBOD5/day Taking a design P.E. of 9,000 the influent BOD load is calculated as 540 kg

BOD/day. With an effluent BOD of 25mg/l in the wastewater treatment plant this

equates to an effluent BOD load of 50.6 kg/day. This is less than the WAC

calculated for the river and therefore acceptable.

Ortho-phosphate P

The Ortho-phosphate P loads permitted in the river are governed by the

Phosphorus Regulations (S.I. 258 of 1998). The regulations state that the

existing biological quality rating assigned between 1st January 1995 and 31st

December 1997 is the rating upon which the improvements in Water Quality will

be judged. In the case of the River Blackwater the Q index was determined as

Q3-4 in 1997 downstream of the wastewater treatment plant.

The minimum target ratings and concentrations for these stretches of water as

defined in the Phosphorus regulations are given in Table 2 below:


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TABLE 2 PHOSPHORUS REGULATIONS TARGET RATINGS AND CONCENTRATIONS

Existing Biological Quality (Q) Rating / Q Index

Minimum Target

Biological Quality (Q)

Rating /Q Index

Molybdate Reactive Phosphate Median Concentration (mg P/L)

3

3-4

3-4

4

0.05

0.03

The chemical analysis of the river upstream and downstream of the existing

wastewater treatment plant shows the existing median ortho-phosphate P levels

to be 0.03mgl and 0.04mg/l respectively.

The Ortho-phosphate P level from the wastewater treatment plant and WAC is

calculated as follows:

Ortho-phosphate P WAC

The existing wastewater treatment plant at Kells does not include chemical dosing

for phosphorus removal. The average effluent Ortho-phosphate P concentration

for the wastewater treatment plant from monthly samples taken by Meath County

Council in 2008 is 3.1mg/l. The increase in river Ortho-phosphate P

concentration is calculated as follows:

Effluent MRP Concentration: 3.1 mg/L

Wastewater Treatment Plant Flowrate (Phase 1): 2,025 m3/day

Effluent MRP = (2025 x 3.1)/1000 = 6.28 kg/day

The river has a target Water Quality Rating of 4, therefore a river Ortho-

phosphate P concentration of 0.03mg/l is required. The Ortho-phosphate P

concentration upstream is assumed to improve to 0.02mg/l as improvements to

phosphorus control from agriculture are provided. . The allowable Ortho-

phosphate P concentration is 0.03mg/l.

P WAC = (Cmax – Cback) x Favg x 86.4

Where Cmax = max. allowable P concentration (mg/l) = 0.03 mg/L

Favg = 8 = average flow in m3/sec

Cback = background P concentration (mg/l) = 0.02mg/L



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P WAC = (0.03 – 0.02) x 8 x 86.4 = 6.9 kg P/day

The effluent Ortho-phosphate P of 6.28kg/day is less than the calculated waste

assimilative capacity of 6.9 kg/day and is therefore acceptable.

Ammonia WAC

The median ammonia levels in the River Boyne upstream and downstream of the

existing wastewater treatment plant are 0.03mg/L and 0.05mg/L respectively.

The increase in ammonia levels without any nitrification in the wastewater

treatment plant is calculated as follows:

Maximum Effluent Ammonia Concentration: 40.0 mg/L

Wastewater Treatment Plant Flowrate: 2025 m3/day

Effluent N = (2025 x 40)/1000 = 81 kg/day

The target ammonia level in the river is taken as 0.5mg/l.

NH3 WAC = (Cmax – Cback) x Favg x 86.4

Where Cmax = max. allowable NH3 concentration (mg/l) = 0.5

mg/L


Cback = background NH3 concentration (mg/l) = 0.03mg/L


NH3 WAC = (0.5 – 0.03) x 8 x 86.4 = 324 kg /day

The maximum effluent ammonia of 81 kg/day is less than the calculated waste

assimilative capacity of 324 kg/day and is therefore acceptable.

Oxidised Nitrogen

The median oxidised nitrogen levels in the River Blackwater (Kells) upstream and

downstream of the existing wastewater treatment plant are 3.7mg/L in both

cases.

The increase in nitrate levels without any nitrification in the wastewater treatment

plant is calculated as follows:


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Maximum Effluent Nitrate Concentration: 30.0 mg/L

Wastewater Treatment Plant Flowrate: 2025 m3/day

Effluent N = (2025 x 30)/1000 = 60.7 kg/day

The maximum allowable nitrate level in the river is taken as 5mg/l.

NO3 WAC = (Cmax – Cback) x Favg x 86.4

Where Cmax = max. allowable NO3 concentration (mg/l) = 5mg/L


Cback = background NO3 concentration (mg/l) = 1.4mg/L


NO3 WAC = (5 – 1.4) x 8 x 86.4 = 2488 kg/day

The maximum effluent nitrate of 60.7 kg/day is less than the calculated waste

assimilative capacity of 2488 kg/day and is therefore acceptable.

The effluent loads to the river and the resultant increase in concentration is

summarised as follows:

Parameter BOD SS P NH3 Nitrate

Effluent loads (kg/day) 50.63 70.88 6.28 81 60.75 Increase in river concentration (mg/l) at 95 percentile flows 1.172 1.641 0.145 1.875 1.406 Increase in river concentration (mg/l) at average flows 0.073 0.103 0.009 0.117 0.088

It should be noted that these effluent loads and increases in concentration are

based on the full design load to the plant. The current effluent loads are less

than this as the plant is not at full design capacity.

o Provide details of the extent and type of ground emissions at the works. There are no groundwater emissions at the Works. o Describe the existing environment in terms of water quality with particular reference to environmental quality standards or other legislative standards. Submit a copy of the most recent water quality management plan or catchment management plan in place for the receiving water body. Give details of any designation under any Council Directive or Regulations that apply in relation to the receiving water.


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A copy of the water quality management plan is attached.

The River Boyne and River Blackwater is designated as an SAC. This site

comprises the freshwater element of the River Boyne as far as the Boyne

Aqueduct, the Blackwater as far as Lough Ramor and the Boyne tributaries. It is

designated as a sensitive water 6.5km downstream of the outfall from the Navan

WWTP. The main channel of the River Boyne is designated as a salmonid water

in SI 293 of 1988. The estuary of the River Boyne is also designated as an SAC.

The impact of the discharge from the wastewater treatment works has been

discussed with the National Parks and Wildlife Service and the impact was also

examined in the Waste Assimilative Calculations carried out for the scheme. The

overall impact is considered to be acceptable.

A site synopsis for the two SAC’s referred to above is given below:

SITE SYNOPSIS SITE NAME: RIVER BOYNE AND RIVER BLACKWATER SITE CODE: 002299

This site comprises the freshwater element of the River Boyne as far as the Boyne Aqueduct, the Blackwater as far as Lough Ramor and the Boyne tributaries including the Deel, Stoneyford and Tremblestown Rivers. These riverine stretches drain a considerable area of Meath and Westmeath and smaller areas of Cavan and Louth.

The underlying geology is Carboniferous Limestone for the most part with areas of Upper, Lower and Middle well represented. In the vicinity of Kells Silurian Quartzite is present while close to Trim are Carboniferous Shales and Sandstones. There are many large towns adjacent to but not within the site. Towns both small and large, include Slane, Navan, Kells, Trim, Athboy and Ballivor.

The site is a candidate SAC selected for alkaline fen and alluvial woodlands, both habitats listed on Annex I of the E.U. Habitats Directive. The site is also selected for the following species listed on Annex II of the same directive – Atlantic Salmon, Otter and River Lamprey.

The main areas of alkaline fen are concentrated in the vicinity of Lough Shesk, Freehan Lough and Newtown Lough. The hummocky nature of the local terrain produces frequent springs and seepages which are rich in lime. A series of base-rich marshes have developed in the poorly-drained hollows, generally linked with these three lakes. Open water is usually fringed by Bulrush (Typha latifolia), Common Club-rush (Scirpus lacustris) or Common Reed (Phragmites australis) and this last species also extends shorewards where a dense stand of Great Fen Sedge or Saw Sedge (Cladium mariscus) frequently occurs. This in turn grades into a sedge and grass community (Carex spp., Molinia caerulea) or one dominated by the Black Bogrush (Schoenus nigricans). An alternative direction for the aquatic/terrestrial transition to take is through a floating layer of vegetation. This is normally based on Bogbean (Menyanthes trifoliata) and Marsh cinquefoil (Potentilla palustris). Other species gradually become established on this cover, especially plants tolerant of low nutrient status e.g. bog mosses (Sphagnum spp.). Diversity of plant and animal life is high in the fen and the flora, includes many rarities. The plants of interest include Narrow-leaved Marsh Orchid (Dactylorhiza traunsteineri), Fen Bedstraw (Galium uliginosum), Cowbane (Cicuta virosa), Frogbit (Hydrocharis morsus-ranae) and Least Bur-reed (Sparganium minimum). These species tend to be restricted in their distribution in Ireland. Also notable is the abundance of aquatic Stoneworts (Chara spp.) which are characteristic of calcareous wetlands.


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The rare plant, Round-leaved Wintergreen (Pyrola rotundifolia) occurs around Newtown Lough. This species is listed in the Red Data Book and is protected under the Flora Protection Order, 1999, and this site is its only occurrence in Co. Meath.

Wet woodland fringes many stretches of the Boyne. The Boyne River Islands are a small chain of three islands situated 2.5 km west of Drogheda. The islands were formed by the build up of alluvial sediment in this part of the river where water movement is sluggish. All of the islands are covered by dense thickets of wet, Willow (Salix spp.) woodland, with the following species occurring: Osier (S. viminalis), Crack Willow (S. fragilis), White Willow (S. alba), Purple Willow (Salix purpurea) and Grey Willow (S. cinerea). A small area of Alder (Alnus glutinosa) woodland is found on soft ground at the edge of the canal in the north-western section of the islands. Along other stretches of the rivers of the site Grey Willow scrub and pockets of wet woodland dominated by Alder have become established, particularly at the river edge of mature deciduous woodland. Ash (Fraxinus excelsior) and Birch (Betula pubescens) are common in the latter and the ground flora is typical of wet woodland with Meadowsweet (Filipendula ulmaria), Angelica (Angelica sylvestris), Yellow Iris, Horsetail (Equisetum spp.) and occasional tussocks of Greater Tussocksedge (Carex paniculata).

The dominant habitat along the edges of the river is freshwater marsh - the following plant species occur commonly here: Yellow Flag (Iris pseudacorus), Creeping Bent (Agrostis stolonifera), Canary Reed-grass (Phalaris arundinacea), Marsh Bedstraw (Galium palustre), Water Mint (Mentha aquatica) and Water Forget-me-not (Myosotis scorpioides). In the wetter areas of the marsh Common Meadow-rue (Thalictrum flavum) is found. In the vicinity of Dowth, Fen Bedstraw (Galium uliginosum), a scarce species mainly confined to marshy areas in the midlands, is common in this vegetation. Swamp Meadow-grass (Poa palustris) is an introduced plant which has spread into the wild (naturalised) along the Boyne approximately 5 km south-west of Slane. It is a rare species which is listed in the Red Data Book and has been recorded among freshwater marsh vegetation on the banks of the Boyne in this site. The only other record for this species in the Republic is from a site in Co. Monaghan.

The secondary habitat associated with the marsh is wet grassland and species such as Tall Fescue (Festuca arundinacea), Silverweed (Potentilla anserina), Creeping Buttercup (Ranunculus repens), Meadowsweet (Filipendula ulmaria) and Meadow Vetchling (Lathyrus pratensis) are well represented. Strawberry Clover (Trifolium fragiferum), a plant generally restricted to coastal locations in Ireland, has been recorded from wet grassland vegetation at Trim. At Rossnaree river bank on the River Boyne, is Round-Fruited Rush (Juncus compressus) found in alluvial pasture, which is generally periodically flooded during the winter months. This rare plant is only found in three counties in Ireland.

Along much of the Boyne and along tributary stretches are areas of mature deciduous woodland on the steeper slopes above the floodplain marsh or wet woodland vegetation. Many of these are planted in origin. However the steeper areas of King Williams Glen and Townley Hall wood have been left unmanaged and now have a more natural character. East of Curley Hole the woodland has a natural appearance with few conifers. Broad-leaved species include Oak (Quercus spp.), Ash (Fraxinus excelsior), Willows, Hazel (Corylus avellana), Sycamore (Acer pseudoplatanus), Holly (Ilex aquifolium), Horse chestnut (Aesculus sp.) and the shrubs Hawthorn (Crataegus monogyna), Blackthorn (Prunus spinosa) and Elder (Sambucus nigra).

South-west of Slane and in Dowth, the addition of some more exotic tree species such as Wych Elm (Ulmus glabra), Beech (Fagus sylvatica), and occasionally Lime (Tilia cordata), are seen. Coniferous trees, Larch (Larix sp.) and Scots Pine (Pinus sylvestris) also occur. The woodland ground flora includes Barren Strawberry (Potentilla sterilis), Enchanter’s Nightshade (Circaea lutetiana) and Ground-ivy (Glechoma hederacea), along with a range of ferns. Variation occurs in the composition of the canopy, for example, in wet patches alongside the river, White Willow and Alder form the canopy.

Other habitats present along the Boyne and Blackwater include lowland dry grassland, improved grassland, reedswamp, weedy wasteground areas, scrub, hedge, drainage ditches and canal. In the vicinity of Lough Shesk, the dry slopes of the morainic hummocks support grassland vegetation which, in some places, is partially colonized by Gorse (Ulex europaeus) scrub. Those grasslands which remain unimproved for pasture are species-rich with Common


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Knapweed (Centaurea nigra), Creeping Thistle (Cirsium arvense) and Ribwort Plantain (Plantago lanceolata) commonly present.

Fringing the canal alongside the Boyne south-west of Slane, are Reed Sweet-grass (Glyceria maxima), Great Willowherb (Epilobium hirsutum) and Meadowsweet.

The Boyne and its tributaries is one of Ireland’s premier game fisheries and it offers a wide range of angling from fishing for spring salmon and grilse to seatrout fishing and extensive brown trout fishing. Atlantic Salmon (Salmo salar) use the tributaries and headwaters as spawning grounds. Although this species is still fished commercially in Ireland, it is considered to be endangered or locally threatened elsewhere in Europe and is listed on Annex II of the Habitats Directive. Atlantic Salmon run the Boyne almost every month of the year. The Boyne is most important as it represents an eastern river which holds large three-sea-winter fish from 20 –30 lb. These fish generally arrive in February with smaller spring fish (10 lb) arriving in April/May.

The grilse come in July, water permitting. The river gets a further run of fish in late August and this run would appear to last well after the fishing season. The salmon fishing season lasts from 1st March to 30th September.

The Blackwater is a medium sized limestone river which is still recovering from the effects of the arterial drainage scheme of the 70’s. Salmon stocks have not recovered to the numbers pre drainage. The Deel, Riverstown, Stoneyford and Tremblestown Rivers are all spring fed with a continuous high volume of water. They are difficult to fish in that some are overgrown while others have been affected by drainage with the resulting high banks.

The site is also important for the populations of two other species listed on Annex II of the E.U. Habitats Directive, namely River Lamprey (Lampetra fluviatilis) which is present in the lower reaches of the Boyne River while the Otter (Lutra lutra) can be found throughout the site. In addition, the site also supports many more of the mammal species occurring in Ireland. Those which are listed in the Irish Red Data Book include Pine Marten, Badger and Irish Hare. Common Frog, another Red Data Book species, also occurs within the site. All of these animals with the addition of the Stoat and Red Squirrel, which also occur within the site, are protected under the Wildlife Act.

Whooper Swans winter regularly at several locations along the Boyne and Blackwater Rivers. Parts of these areas are within the cSAC site. Known sites are at Newgrange (c. 20 in recent winters), near Slane (20+ in recent winters), Wilkinstown (several records of 100+) and River Blackwater from Kells to Navan (104 at Kells in winter 1996/97, 182 at Headfort in winter 1997/98, 200-300 in winter 1999/00). The available information indicates that there is a regular wintering population of Whooper Swans based along the Boyne and Blackwater River valleys. The birds use a range of feeding sites but roosting sites are not well known. The population is substantial, certainly of national, and at times international, importance. Numbers are probably in the low hundreds.

Intensive agriculture is the main landuse along the site. Much of the grassland is in very large fields and is improved. Silage harvesting is carried out. The spreading of slurry and fertiliser poses a threat to the water quality of this salmonid river and to the lakes. In the more extensive agricultural areas sheep grazing is carried out.

Fishing is a main tourist attraction on the Boyne and Blackwater and there are a number of Angler Associations, some with a number of beats. Fishing stands and styles have been erected in places. The Eastern Regional Fishery Board have erected fencing along selected stretches of the river as part of their salmonid enhancement programme. Parts of the river system have been arterially dredged. In 1969 an arterial dredging scheme commenced and disrupted angling for 18 years. The dredging altered the character of the river completely and resulted in many cases in leaving very high banks. The main channel from Drogheda upstream to Navan was left untouched, as were a few stretches on the Blackwater. Ongoing maintenance dredging is carried out along stretches of the river system where the gradient is low.


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This is extremely destructive to salmonid habitat in the area. Drainage of the adjacent river systems also impacts on the many small wetland areas throughout the site. The River Boyne is a designated Salmonid Water under the EU Freshwater Fish Directive.

The site supports populations of several species listed on Annex II of the EU Habitats Directive, and habitats listed on Annex I of this directive, as well as examples of other important habitats. Although the wet woodland areas appear small there are few similar examples of this type of alluvial wet woodland remaining in the country, particularly in the north-east. The semi-natural habitats, particularly the strips of woodland which extend along the river banks and the marsh and wet grasslands, increase the overall habitat diversity and add to the ecological value of the site as does the presence of a range of Red Data Book plant and animal species and the presence of nationally rare plant species.

19.06.2003

SITE SYNOPSIS SITE NAME: BOYNE COAST AND ESTUARY SITE CODE: 001957 Boyne Coast and Estuary is a coastal site which includes most of the tidal sections of the River Boyne, intertidal sand and mud flats, salt marshes, marginal grassland, and the stretch of coast from Bettystown to Termonfeckin that includes the Mornington and Baltray sand dune systems.

The Boyne River channel, which is navigable and dredged, is defined by training walls, these being breached in places. Intertidal flats occur on the sides of the channelled river. The sediments vary from fine muds in the sheltered areas to sandy muds or sands towards the river mouth. The linear stretches of intertidal flats to the north and south of the river mouth are mainly composed of sand. One or more species of Eelgrass (Zostera spp.) occur in the estuary.

Parts of the intertidal areas are fringed by salt marshes, most of which are of the Atlantic type, and dominated by Sea-purslane (Halimione portulacoides). Other species present include Common Saltmarsh-grass (Puccinellia maritima), Sea Plantain (Plantago maritima), Lax-flowered Sea-lavender (Limonium humile) and Glasswort (Salicornia spp.). Common Cord-grass (Spartina anglica) occurs frequently on the flats and salt marshes.

The two sand dune systems in the site, at Baltray and Mornington, are of conservation value, despite the restricted distribution of the intact areas and the high recreational pressure to which they are subjected. A gradient from embryonic dunes to Marram dunes and then fixed dunes is shown at both systems. The embryonic dunes are particularly well-developed at Baltray where there is active accretion. Species present include Sand Couch (Elymus farctus), Lyme-grass (Leymus arenarius), Marram, (Ammophila arenaria), Sea Sandwort (Honkenya peploides) and Prickly Saltwort (Salsola kali). The embryonic dunes grade into a narrow band of shifting Marram dunes. Marram is dominant, though there are also such species as Cat’s-ear (Hypochoeris radicata), Mouse-ear Hawkweed (Hieracium pilosella) and Dandelion (Taraxacum officinale). The areas of fixed dunes on the site have a typical diversity of species, including Marram, Red Fescue (Festuca rubra), Wild Carrot (Daucus carota), Common Bird’s-foot-trefoil (Lotus corniculatus), Common Restharrow (Ononis repens), Wild Thyme (Thymus praecox), Lady’s Bedstraw (Galium verum) and Wild Pansy (Viola tricolor). Vegetation dominated by bryophytes and lichens is limited, though such species as Brachythecium albicans, Hypnum cupressiforme, Peltigera canina and Cladonia spp. occur. Some dune slacks may still occur at the site. A number of scarce plants such as Viper’s-bugloss (Echium vulgare), Adder’stongue (Ophioglossum vulgatum), Variegated Horsetail (Equisetum variegatum) and Wild Sage (Salvia verbenaca) have been recorded from the site in the past. The lastnamed species is of particular note as it is a Red Data Book species at its most northerly known Irish station.


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The site supports a population of the rare snail, Helix pisana, in Ireland known only from the coast between counties Louth and Dublin. The Boyne is the second most important estuary for wintering birds on the Louth-Meath coastline. From a recent wetland survey carried out over 4 seasons (1994/95-97/98), it is known that this site supports nationally important numbers of Shelduck (176 individuals), Golden Plover (5,338), Lapwing (4,755), Knot (1,559), Black-tailed Godwit (414), Redshank (539), Turnstone (104), Oystercatcher (922), Grey Plover (112) and Sanderling (93).

Other species of regional or local importance include Brent Goose (142), Wigeon (485), Teal (185), Mallard (160), Dunlin (627), Curlew (352) and Ringed Plover (c. 100). An area of shingle at Baltray Dunes is also an important breeding site for Little Tern, with 14 pairs recorded in 1995. Little Tern is the rarest Irish tern species, and is listed on Annex I of the E.U. Birds Directive. Part of the estuary is a Wildfowl Sanctuary and has been designated a Special Protection Area under the E.U. Birds Directive.

In general the site has been somewhat modified by human activities. The river is regularly dredged to accommodate cargo ships, which can cause disturbance to the bird, fish and invertebrate communities in the estuary. Several factories operate upstream from the estuary and pollution and disturbance associated with them has had an impact on the ecology of the area. There is a proposal to create a deep water facility at the north end of Mornington Dunes on the mouth of the Boyne estuary. The site is of considerable conservation as a coastal complex that supports good examples of eight habitats that are listed on Annex I of the E.U. Habitats Directive (estuaries, tidal mudflats, Salicornia mud, Atlantic salt meadows, Mediterranean salt meadows, embryonic shifting dunes, Marram dunes and fixed dunes) and for the important bird populations that it supports.

2.10.2001

o Provide a statement as to whether or not emissions of main

polluting substances (as defined in the Dangerous Substances Regulations S.I. No. 12 of 2001) to water are likely to impair the environment.

The level of dangerous substances both in the effluent and in the River Boyne as detailed in Tables D1 and Tables F1 show a level below that in S.I. No. 12 of 2001 and therefore the emissions are not considered likely to impair the environment.

o In circumstances where water abstraction points exist downstream

of any discharge describe measures to be undertaken to ensure that discharges from the waste water works will not have a significant effect on faecal coliform, salmonella and protozoan pathogen numbers, e.g., Cryptosporidium and Giardia, in the receiving water environment.

There are drinking water abstractions from the River Boyne downstream of the discharge from the wastewater treatment plant at Liscarton (14 km downstream). There is an additional water abstraction in the River Boyne at East Meath.

Details of these water abstractions are included in Table F2.


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o Indicate whether or not emissions from the agglomeration or any plant, methods, processes, operating procedures or other factors which affect such emissions are likely to have a significant effect on – (a) a site (until the adoption, in respect of the site, of a decision by the

European Commission under Article 21 of Council Directive 92/43/EEC for the purposes of the third paragraph of Article 4(2) of that Directive) —

(b) a site adopted by the European Commission as a site of Community

importance for the purposes of Article 4(2) of Council Directive 92/43/EEC1 in accordance with the procedures laid down in Article 21 of that Directive,

(c) a special area of conservation within the meaning of the Natural Habitats

Regulations, or (d) an area classified pursuant to Article 4(1) or 4(2) of Council Directive

79/409/EEC2; The River Boyne and River Blackwater (Kells) is designated as an SAC. This site comprises the freshwater element of the River Boyne as far as the Boyne Aqueduct, the Blackwater as far as Lough Ramor and the Boyne tributaries. The River Boyne is designated as a sensitive water downstream of Navan. The estuary of the River Boyne is also designated as an SAC. Details of the SAC’s are given above. The impact of the discharge from the wastewater treatment works has been discussed with the National Parks and Wildlife Service and the impact was also examined in the Environmental Impact Statement for the scheme. The overall impact is considered to be acceptable (See attached correspondence from NPWS below).

Fiona Lane From: Maurice Eakin [[email protected]] Sent: 09 September 2008 16:38 To: Fiona Lane Cc: Ciara Flynn; Linda Patton; Padraig Comerford Subject: Re: Wastewater Discharge Licences for County Meath Attachments: ATT00001.c ATT00001.c (1 KB) Fiona

I understood from the EU guidelines on AA (section 3.1.1) that the

competent authority was the one who issued the licences and that they

were required to carry out the screening, in this case that would be

the EPA. NPWS would be a statutory consultee. We have not the

competency to assess these Licence application re Appropriate

Assessment. Since the River Boyne and Blackwater are SAC designated

for Salmon, Otter and Lamprey then any discharge should be

sufficiently 'clean' to ensure no negative impacts on these species,

primarily Salmon. The Fisheries Board would be better placed to

assess the application re salmonid impacts.

regards


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Maurice

Dr. Maurice Eakin

National Parks and WIldlife Service

Department of Environment, Heritage and Local Government, Government

Buildings, Kilcarn, Athlumney, Navan, Co. Meath

>>> Fiona Lane <[email protected]> 08/21/08 12:18 PM >>>

Maurice,

We are currently preparing Wastewater Discharge Licences for six

wastewater treatment plants in County Meath. I was given your

contact details by Meath County Council. We would like to get your

input or comments on any impacts on any designated European Sites.

The six wastewater treatment plants are as follows:

Athboy WWTP - discharging to the Athboy River Duleek WWTP -

discharging to the River Nanny Enfield-Johnstownbridge WWTP -

discharging to the Blackwater (Longwood) Castletown-Tara

(Dunshaughlin) WWTP - discharging to the River Boyne Kells WWTP -

discharging to the Blackwater (Kells) Trim WWTP - discharging to the

River Boyne

We are currently preparing information on waste assimilative

capacity, storm overflows etc. for submission with the Wastewater

Discharge Licence Application. A summary of the design population

equivalents, flows and treatment standards are attached.

There are approved Environmental Impact Statements available for the

larger plants at Trim and Castletown Tara.

Would you be able to comment on whether an appropriate assessment is

required for any of the above schemes. We are available to meet with

you to discuss each of the schemes and provide additional information

as required or if you want to contact me I can discuss further.

Regards,

Fiona Lane Senior Engineer


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Nicholas O'Dwyer Consulting Engineers Nutgrove Office Park Nutgrove Avenue Dublin 14 Tel: +353 (0)1 296 9000 Fax: +353 (0)1 296 9001 [email protected]<mailto:[email protected]>

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CONFIDENTIALITY, COPYRIGHT AND DISCLAIMER NOTICE

This e-mail is confidential and may contain copyrighted or legally privileged information.

If you are not named above as an addressee it may be unlawful for you to read, alter, copy, distribute, disclose or otherwise use the information in this e-mail. If you are not the intended recipient of this e-mail please contact us on one of the following phone numbers or postal addresses:

Dublin Office: Nicholas O'Dwyer Ltd., Nutgrove Office Park, Nutgrove Ave., Dublin 14.

Ph: +353 (0)1 2969000 Newry Office: Nicholas O'Dwyer Ltd., 15 Downshire Road, Newry

BT35 IEE, Co. Down. Ph: +353 (0)48 30266915 Limerick Office: Nicholas O'Dwyer Ltd.,

Park House, Arthurs Quay, Limerick. Ph: +353 (0)61 318981 Sligo Office: Lynch McNulty

Ltd., McGee House, 22 John Street, Sligo. Ph: +353 (0)71 9144820 Cork Office:

O'Connell Harley O'Dwyer, 11 South Mall, Cork. Ph: +353 (0)21 4273266

o Describe, where appropriate, measures for minimising pollution over long distances or in the territory of other states.

The impact of the discharge from the wastewater treatment plant in Kells

has been calculated in the Waste Assimilative Capacity calculations above.

This shows that the impact of the discharge can be assimilated into the

river and will not have a pollution effect over long distances.

o This section should also contain full details of any modelling of discharges from the agglomeration. Full details of the assessment and any other relevant information on the receiving environment should be submitted as Attachment F.1.

No modelling of the discharge to the River Blackwater (Kells) has been

carried out. However, the impact of the discharge from the wastewater

treatment plant in Kells has been calculated in the Waste Assimilative

Capacity calculations above.


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EPA Export 26-07-2013:02:11:45


ATTACHMENT No: F2

Drinking Water Abstraction Point(s)


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EPA Export 26-07-2013:02:11:45

Kells WWTW - Table F2ABS_CD AGG_SERVED ABS_VOL PT_CD DIS_DS EASTING NORTHING VERIFIED

Abstraction Code

Agglomeration Served

Abstraction Volume (m3/day)

Point Code Provide label ID’s

Distance Downstream in meters from Emission Point to Abstraction Point

6E-digit GPS Irish National Grid Reference

6N-digit GPS Irish National Grid Reference

Y = GPS used, N = GPS not

LISCARTON WTPNavan – Mid Meath Supply

code: 2300PUB1016 Y

Kellls WWTP to Liscarton Abstraction point

= 14000 284174 26952929780 12000


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ATTACHMENT No: G1

Compliance with Council Directives - Programme of

Improvement

(Approved funding and a timeframe for completion)


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Summary of Relevant Council Directives Dangerous Substances Directive 2006/11/EC

This Directive concerns pollution caused by certain dangerous substances discharged into the aquatic environment of the EU. Monitoring for dangerous substances in the final effluent was carried out on two occasions. An average of both results was taken and is tabulated in Table D1. Concentrations of Table 1 parameters, Pesticides and Solvents in the receiving water are lower than the prescribed maxima for all parameters. Calculated concentrations of Table 2 parameters, Metals and Other Substances in the receiving water at DWF, are lower than the prescribed maxima in all cases. No further works are required to ensure compliance with the Dangerous Substances Directive

The Water Framework Directive 2000/60/EC

The WFD sets a framework for comprehensive management of water resources in the European Union, within a common approach and with common objectives, principles and basic measures. It addresses inland surface waters, estuarine and coastal waters and groundwater. The fundamental objective of the Water Framework Directive aims at maintaining “high status” of waters where it exists, preventing any deterioration in the existing status of waters and achieving at least “good status” in relation to all waters by 2015. Member States will have to ensure that a co-ordinated approach is adopted for the achievement of the objectives of the WFD and for the implementation of programmes of measures for this purpose. The improvements made to the treatment works as part of the optimisation works will enable the objectives of this Directive to be met.

The Birds Directive 79/409/EEC

This Directive and amending acts, aim at providing long term protection and conservation of all bird species naturally living in the wild within the European territory of the Member States. These member states must conserve, maintain or restore the biotopes and habitats of birds by creating protection zones such as SPAs. The River Blackwater forms part of the River Boyne and River Blackwater SAC. The upgrade to the wastewater treatment works currently underway will improve the effluent quality being discharged to the SAC.

The Groundwater Directives 80/68/EEC & 2006/118/EC

Not Applicable. The Drinking Water Directives 80/778/EEC

Not Applicable. The Urban Waste Water Treatment Directive 91/271/EEC

The optimisation works to Kells WwTP will ensure compliance with this Directive. The effluent standards to be adopted are as per the table below:


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Parameter Concentration (mg/l)

BOD5 25

Total Suspended Solids 35

COD 125

The Habitats Directive 92/43/EEC

The main aim of the EC Habitats Directive is to promote the maintenance of biodiversity by requiring Member States to take measures to maintain or restore natural habitats and wild species at a favourable conservation status, introducing robust protection for those habitats and species of European importance. Protection zones for annexed species such as SACs were designated as part of this Directive. The River Blackwater forms part of the River Boyne and River Blackwater SAC. The upgrade to the wastewater treatment works currently underway will improve the effluent quality being discharged to the SAC.

The Environmental Liabilities Directive 2004/35/EC

Regard to the EPA Guidance on Environmental Liability Risk Assessment, Residuals Management Plans and Financial Provision was made during completion of this application. The proposed optimisation works will serve to enhance compliance with this Directive.

The Bathing Water Directive 76/160/EEC

Not Applicable. Shellfish Waters Directive (79/923/EEC)

Not Applicable

Programme of Improvements

There are optimisation works proposed for the Kells Wastewater Treatment Plant in 2009. These works are due to be complete in 2009.


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ATTACHMENT No: G2

Compliance with Water Quality Standards for

Phosphorus Regulations - Programme of

Improvement

(Approved funding and documentation)


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The requirement for phosphorus removal will be reviewed as part of the main

upgrade works to the Kells Wastewater Treatment Plant due to be complete in

2013. Details of the approved funding are included in Attachment B10.


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ATTACHMENT No: G3

Impact Mitigation - Programme of Improvement


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The Kells Wastewater Treatment Plant is due to undergo optimisation works in 2009 to improve the existing wastewater treatment plant. These optimisation works are due to be complete in mid-2009. The Kells Sewerage Scheme has been approved to provide a major upgrade of the existing sewerage scheme as part of the Water Services Investment Programme 2007-2009. This scheme is due to be complete in 2013. A copy of approved funding for the project is in Appendix B10.


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ATTACHMENT No: G4

Stormwater Overflow - Programme of Improvement

(Approved funding and a timeframe for completion)


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The Kells Wastewater Treatment Plant is due to undergo optimisation works in 2009 to improve the existing wastewater treatment plant. These optimisation works are due to be complete in mid-2009. As part of the Kells optimisation works a new storm water holding tank is to be provided. This will ensure that storm water overflows are reduced to acceptable levels. The plant peak design flow to full treatment shall be 3 DWF. Flows in excess of the plant peak design flow shall overflow to the stormwater tank. The stormwater shall flow by gravity to the stormwater tank. Stormwater tanks shall be designed to allow settlement and ensure that no pollution occurs from storm tank overflows. The process design and control system shall be designed to ensure that the storm tanks are available for use at all times to prevent overflow due to consecutive periods of high flows. There shall be an overflow from the stormwater tank to the outfall sewer. All overflows shall be screened. The capacity of the stormwater screens shall equal the peak flow to treatment capacity or the outfall capacity, whichever is greater. The stormwater tanks shall be provided with a cleaning system to automatically clean the tanks once the storm flows have abated and the tanks are emptied. The stored stormwater shall be returned in a controlled manner so that the combined rate of influent flow and return stormwater flow does not exceed the plant peak design flow. The Kells Sewerage Scheme has been approved to provide a major upgrade of the existing sewerage scheme as part of the Water Services Investment Programme 2007-2009. This scheme is due to be complete in 2013. A copy of approved funding for the project is in Appendix B10.


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ATTACHMENT No: C.1 OPERATIONAL INFORMATION … · 2013-07-26 · 3.23m. The aerator is located in...

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