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ACHILL WASTE WATER TREATMENT SCHEME
Non Technical Summary.
1. WASTE WATER DISCHARGE LICENCE (BACKGROUND) Mayo County Council, Aras an Chontae, Castlebar, Co. Mayo is making an application to the Environmental Protection Agency (E.P.A.) for a waste water discharge license for the Achill Waste Water Treatment Plant at Purteen and Agglomeration in compliance with the Waste Water Discharge (Authorisation) Regulations 2007 (S.I. No. 684 of 2007) Under Schedule 2 of the above regulations, the prescribed date for submissions of Waste Water Discharge License Applications for agglomerations (with discharges with a population equivalent of 2,001 PE to 10,000 PE) is 22nd September, 2008. The waste water works at Purteen, Achill Island falls under this category, presently having an agglomeration with a population equivalent of approximately 2,500 PE. The original scheme was built in 1991.
2. DESCRIPTION OF PURTEEN, ACHILL ISLAND WASTE WATER WORKS. The Purteen Waste Water Treatment Plant with a capacity of 4,000 PE is currently being operated by Mayo County Council. Treated effluent from the Plant is discharged to the Atlantic Ocean (Primary Discharge Point.) The waste water works in Purteen, Achill Island consists of a Wastewater Treatment Plant with a collection network of Foul Sewers and 4 No. Pumping Stations. The municipal treatment works is based on the extended aeration process and is designed to treat sewage from a population equivalent of 4000 PE. The Municipal Treatment Process consists of the following:
Inlet works with 12mm automatic screen, standby manual screen, screenings flushed to macerator, compaction and grit removal.
2 No. Aeration Tanks 2 No. Secondary Settling Tanks Final Effluent Sampling Point Sludge Pumping Sludge Thickening Sludge Dewatering Supernatent return to inlet works.
Of the 4 No. Pumping Stations, 2 pump directly to the Treatment works, with the remaining 2 located as topography dictates around the catchments.
3. SOURCES OF EMISSIONS: Emissions from the Treatment works are discharged to the Atlantic Ocean (through an outfall labelled SW1). This is the primary discharge point.
There are 3 No. secondary discharge points (labelled SW2, SW3 and SW4). These are emergency overflows at the Pump Houses located at PS4, PS2 and PS3 respectively. These emergency overflows are provided in case of difficulties, such as power cuts at the pumping plant and excessive rainfall. To protect Keel Strand there is no storm-water overflow at the Keel Pumping Station. There is, however, a Balancing Tank and a standby Generator. To protect Dooagh Strand the total pumping capacity at the main Dooagh Pumping Station is 12 times D.W.F.
4. NATURE AND QUANTITY OF FORESEEABLE EMISSIONS: The Wastewater Treatment Works is designed to produce a final effluent that is at least to ‘Royal Commission’ standards. That is a maximum BoD of 20mg/l and maximum suspended solids of 30mg/l. The average volume currently discharged from the municipal effluent stream of the Treatment Plant is 562.5 cu.m/day (2,500 PE @ 225l/per PE day). This is equivalent to an average daily discharge of 162 kg BoD. It is not anticipated that the municipal effluent will increase appreciably in the meantime.
5. TECHNOLOGY FOR PREVENTION OR REDUCTION OF EMISSIONS: Emissions from the Wastewater Treatment Plant are monitored and the treatment process is constantly adjusted to maximise the efficiency of the plant in removing pollutants.
6. SUPERVISION OF WORKS: The wastewater treatment works is staff by a plant manager and an assistant. The Plant Manager’s hours are 39 hours for a 7 day week plus any necessary overtime and call outs. Cover for the Plant Manager is provided every 4th weekend and holidays.
Tobercolman
Rises
Slievemore
Rises
Rises
Ooghnadirka
Rises
Ooghnagertleen
Ooghnabo
(Disused)
Quarry
Uggoole
Gubnahooeycam
Ooghduff
(in Ruins)
Signal Tower
Uggoolegarve
Feagher Point
Cornaclea Point
Rises
Lough Nakeeroge
SandShingle
DOOGORT WEST
Lough Aigher
Slivevemore
(Calvy)
BAL OF DOOKINELLY
Slievemore Caher
Giant's Grabe
Cromlerh
Danish Ditch
Cromuch Cumulus
Grave Yard
Ground
Cross(Site of)
Burial
Gubroe
School
Crumpaun
SLIEVEMORE
Tenr
egee
Rive
r
Portnalvinga
Gubalennaun beg
QuayPier
Reservoir
ShingleSand
Pollagh
Church
(Site of)Cemetrey
BELLANASALLY
Ballaknock
School
River
Sruhillbeg Lough
Sand Hills
Pagan
Cabin
Trawmore
Sand &Shingle
Sand Hills
Sand Hills
Sand Hills
Midens
Sand
(Site of)
Sand Hills
Keel Lough
KEEL EAST
DOOKINELLY
(Thulis)
Dookinelly
Sand
ShingleSand &
Gallaghers River
Sand &Shingle
SLIEVEMORE
ATLANTIC OCEAN
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
LEGEND
Agglomeration Boundary
Achill WastewaterTreatment Plant Boundary
Drg. Title:
Achill Wastewater Treatment PlantAgglomeration Served by the Wastewater Treatment Works
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 22,000 (Inset 1: 50,000) 29.08.08
Map B.1. A
L. Collier S. Verity T. Reidy
Achill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment Plant
Reservoir
HWM
HWM
CF
UN
D
!!
Sludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying Beds
Sludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering Building
Sludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding Tank
Control BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl Building
Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2
Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1
Sludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge Pump
Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1
Inlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet Works
Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW5SW5SW5SW5SW5SW5SW5SW5SW5
SP1SP1SP1SP1SP1SP1SP1SP1SP1
SP2SP2SP2SP2SP2SP2SP2SP2SP2
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Pumping Station
Achill WastewaterTreatment Plant Boundary
Drg. Title:
Achill Wastewater Treatment PlantLayout Plan
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 1,000 (Inset 1: 50,000) 01/09/08
Map B.2. A
L. Collier S. Verity T. Reidy
!
!!
!
!
PS4PS4PS4PS4PS4PS4PS4PS4PS4
PS3PS3PS3PS3PS3PS3PS3PS3PS3 PS2PS2PS2PS2PS2PS2PS2PS2PS2PS1PS1PS1PS1PS1PS1PS1PS1PS1
SP2SP2SP2SP2SP2SP2SP2SP2SP2 SP1SP1SP1SP1SP1SP1SP1SP1SP1
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW5SW5SW5SW5SW5SW5SW5SW5SW5
SW2SW2SW2SW2SW2SW2SW2SW2SW2SW4SW4SW4SW4SW4SW4SW4SW4SW4 SW3SW3SW3SW3SW3SW3SW3SW3SW3
(3Nr)(1Nr)
(1Nr)(1Nr)
(4Nr)
(1Nr)
ATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEAN
Note: There are no upstreamor downstream monitoring points at Achill WWTP.
BELLANASALLY
KEEL EAST
SLIEVEMORE
ATLANTIC OCEAN
!
!!
!
!
PS4PS4PS4PS4PS4PS4PS4PS4PS4
PS3PS3PS3PS3PS3PS3PS3PS3PS3PS1PS1PS1PS1PS1PS1PS1PS1PS1 PS2PS2PS2PS2PS2PS2PS2PS2PS2
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW5SW5SW5SW5SW5SW5SW5SW5SW5
SW3SW3SW3SW3SW3SW3SW3SW3SW3SW4SW4SW4SW4SW4SW4SW4SW4SW4
SW2SW2SW2SW2SW2SW2SW2SW2SW2
SP2SP2SP2SP2SP2SP2SP2SP2SP2 SP1SP1SP1SP1SP1SP1SP1SP1SP1
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
!!!
LEGEND
Inlet Sampling Point (1Nr)Outlet Sampling Point (1Nr)
Primary Discharge Point (1Nr)Secondary Discharge Point (3Nr)Stormwater Discharge Point (1Nr)
Agglomeration Boundary
Achill WastewaterTreatment Plant Boundary
Pumping Station (4Nr)
Drg. Title:
Achill Wastewater Treatment PlantLocation of Primary Discharge Point (SW1)
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
Overview 1:22,000Zoom-in 1:1,000 01/09/08
Map B.3. A
L. Collier S. Verity T. Reidy
Reservoir
HWM
HWM
UN
D
!!
Inlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksFinal Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1
Sludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge Pump
Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2
Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2
Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)
SP2SP2SP2SP2SP2SP2SP2SP2SP2
SP1SP1SP1SP1SP1SP1SP1SP1SP1
Note: There are no upstream or downstreammonitoring points at Achill WWTP.
ATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEANATLANTIC OCEAN
Gubroe
Mill Stream
School
Crumpaun
SLIEVEMORE
Tenr
egee
Rive
r
Church
(Site of)Cemetrey
BELLANASALLY
Ballaknock
School
River
Sruhillbeg Lough
Sand Hills
Pagan
Cabin
Trawmore
Sand &Shingle
Sand Hills
Sand Hills
Sand Hills
Midens
Sand
(Site of)
Sand Hills
Keel Lough
KEEL EAST
Waterfall
Holy Well
DOOKINELLY
(Thulis)
(Site of)
Cathedral Rocks
Sand &
Carrickwilliam
Shingle
Dookinelly
Sand
ShingleSand &
Gallaghers River
Sand &Shingle
SLIEVEMORE
ATLANTIC OCEAN
Portnalvinga
Gubalennaun beg
Inishgallon
QuayPier
Reservoir
ShingleSand
Pollagh
Gubalennaun More
!
!!
!
!
PS2PS2PS2PS2PS2PS2PS2PS2PS2PS3PS3PS3PS3PS3PS3PS3PS3PS3
PS4PS4PS4PS4PS4PS4PS4PS4PS4
PS1PS1PS1PS1PS1PS1PS1PS1PS1
SW3SW3SW3SW3SW3SW3SW3SW3SW3
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW5SW5SW5SW5SW5SW5SW5SW5SW5
SW4SW4SW4SW4SW4SW4SW4SW4SW4
SW2SW2SW2SW2SW2SW2SW2SW2SW2
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Agglomeration Boundary
Pumping Station
Achill WastewaterTreatment Plant
Drg. Title:
Achill Wastewater Treatment PlantLocation of Secondary Discharge PointsKEY PLAN
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1:22,000 01/09/08
Map B.4.1 A
L. Collier S. Verity T. Reidy
(1Nr)
(4Nr)
(1Nr)(3Nr)
(1Nr)(1Nr)
Map B4.3Map B4.3Map B4.3Map B4.3Map B4.3Map B4.3Map B4.3Map B4.3Map B4.3
Map B4.4Map B4.4Map B4.4Map B4.4Map B4.4Map B4.4Map B4.4Map B4.4Map B4.4
Map B4.2Map B4.2Map B4.2Map B4.2Map B4.2Map B4.2Map B4.2Map B4.2Map B4.2
Note: There are no upstream or downstreammonitoring points at Achill WWTP
HWM
5.9
6.7
!
PS4PS4PS4PS4PS4PS4PS4PS4PS4
SW2SW2SW2SW2SW2SW2SW2SW2SW2
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
Drg. Title:
Achill Wastewater Treatment PlantLocation of Secondary Discharge Point SW2(Dooagh No.2 Pump Station)
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 1,000 19/08/08
Map B4.2 A
L. Collier S. Verity T. Reidy
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Agglomeration Boundary
Pumping Station
Achill WastewaterTreatment Plant
(1Nr)
(4Nr)
(1Nr)(3Nr)
(1Nr)(1Nr)
Note: There are no upstream or downstreammonitoring points at Achill WWTP
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
Mill StreamMill StreamMill StreamMill StreamMill StreamMill StreamMill StreamMill StreamMill Stream
School
FF
UND
!
PS2PS2PS2PS2PS2PS2PS2PS2PS2
SW3SW3SW3SW3SW3SW3SW3SW3SW3
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
Drg. Title:
Achill Wastewater Treatment PlantLocation of Secondary Discharge Point SW3(Dookinelly Pump Station)
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 1,000 01/09/08
Map B4.3 A
L. Collier S. Verity T. Reidy
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Agglomeration Boundary
Pumping Station
Achill WastewaterTreatment Plant
(1Nr)
(4Nr)
(1Nr)(3Nr)
(1Nr)(1Nr)
Note: There are no upstream or downstreammonitoring points at Achill WWTP
Gallaghers River
Gallaghers River
Gallaghers River
Gallaghers River
Gallaghers River
Gallaghers River
Gallaghers River
Gallaghers River
Gallaghers River
9.4
10.8
11.69.2
PO
8.7
6.9
S a n d
8.1
11.8
7.3
8.7
Dooagh
11.8
10.4
10.1
!
PS3PS3PS3PS3PS3PS3PS3PS3PS3
SW4SW4SW4SW4SW4SW4SW4SW4SW4
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
Drg. Title:
Achill Wastewater Treatment PlantLocation of Secondary Discharge Point SW4(Dooagh No.1 Pump Station)
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 1,000 01/09/08
Map B4.4 A
L. Collier S. Verity T. Reidy
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Agglomeration Boundary
Pumping Station
Achill WastewaterTreatment Plant
(1Nr)
(4Nr)
(1Nr)(3Nr)
(1Nr)(1Nr)
Note: There are no upstream or downstreammonitoring points at Achill WWTP
Tenregee River
Tenregee River
Tenregee River
Tenregee River
Tenregee River
Tenregee River
Tenregee River
Tenregee River
Tenregee River
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
(Calvy)
DOOKINELLY
BELLANASALLYKEEL EAST
SLIEVEMORE
ATLANTIC OCEAN
!
!!
!
!
PS2PS2PS2PS2PS2PS2PS2PS2PS2PS3PS3PS3PS3PS3PS3PS3PS3PS3
PS4PS4PS4PS4PS4PS4PS4PS4PS4
PS1PS1PS1PS1PS1PS1PS1PS1PS1
SP2SP2SP2SP2SP2SP2SP2SP2SP2 SP1SP1SP1SP1SP1SP1SP1SP1SP1
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW5SW5SW5SW5SW5SW5SW5SW5SW5
SW3SW3SW3SW3SW3SW3SW3SW3SW3SW4SW4SW4SW4SW4SW4SW4SW4SW4
SW2SW2SW2SW2SW2SW2SW2SW2SW2
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Agglomeration Boundary
Pumping Station
Achill WastewaterTreatment Plant
Drg. Title:
Achill Wastewater Treatment PlantLocation of Stormwater Discharge Points (SW5)
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
Top Panel: 1/ 25,000Bottom Panel: 1: 2,500 01/09/08
Map B.5 A
L. Collier S. Verity T. Reidy
(1Nr)
(4Nr)
(1Nr)(3Nr)
(1Nr)(1Nr)
Note: There are no upstream or downstreammonitoring points at Achill WWTP
Gubalennaun beg
LWM
LWM
QuayPier
UNDHWM
UND
LWM
Reservoir
HWM
HWM
CF
UN
D
!!
SP2SP2SP2SP2SP2SP2SP2SP2SP2
SP1SP1SP1SP1SP1SP1SP1SP1SP1
SW5SW5SW5SW5SW5SW5SW5SW5SW5
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
SITE NOTICE
APPLICATION TO THE ENVIRONMENTAL PROTECTION AGENCY FOR A WASTE WATER DISCHARGE LICENCE
Applicant: Mayo County Council, Áras an Chontae, The Mall, Castlebar, County Mayo.
Mayo County Council intends to apply to the Environmental Protection Agency for a Waste Water Discharge Licence, in accordance with the Waste Water Discharge (Authorisation) Regulations 2007 for the discharge from the Achill Waste Water Treatment Plant and Agglomeration. The Achill Waste Water Treatment Plant, located at Purteen, Achill Island, County Mayo (62,053E, 303,854N) comprises of the existing municipal treatment plant and the associated collection network. This application relates to the following existing discharges; Primary Outfall SW1 (P) & Stormwater Overflow SW5 (61,942E, 303,731N) and Secondary SW2 (59,984E, 304,590N), Secondary SW3 (65,717E, 304,829N) and Secondary SW4 (60,459E, 304,855N). The Waste Water Treatment Plant uses biological processes in conjunction with physical settling and chemical dosing to remove the pollutants from the influent and treat it to the standard set out in Urban Wastewater Treatment Regulations 2001. Effluent is to be discharged into the Atlantic Ocean. A copy of the application and information related to the application will be available for inspection or purchase at the headquarters of the Agency and at the offices of Mayo County Council, Áras an Chontae, The Mall, Castlebar, County Mayo as soon as is practicable after receipt. Submissions in relation to the application may be made to the Agency at its headquarters:
Environmental Protection Agency, Johnstown Castle Estate,
Co. Wexford.
Gubalennaun beg
LWM
LWM
QuayPier
UNDHWM
UND
LWM
Reservoir
HWM
HWM
CF
UN
D
Shingle
Pollagh
CF
19.2
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
LEGEND
Location of Site Notice
Agglomeration Boundary
Achill WastewaterTreatment PlantBoundary
Drg. Title:
Achill Wastewater Treatment PlantLocation of Site Notice
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 2,500 (Inset 1: 50,000) 01/09/08
Map B.8. A
L. Collier S. Verity T. Reidy
Achill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterAchill WastewaterTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment PlantTreatment Plant
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
Achill Wastewater Treatment Scheme
C1 Operational Information Requirements: The Achill Wastewater Treatment Scheme consists of a Wastewater Treatment Plant at Purteen with a collection network of foul sewers and 4 no. pumping stations. Achill Island Wastewater Treatment Plant was built in 1991 and consists of inlet works with screening, disintegration and grit removal. The Treatment Process consists of two aeration tanks followed by two final settlement tanks. Sludge is stored in a sludge holding tank prior to dewatering by a belt press. Plant has storage for 26 cu. m. At present sludge is dewatered at the Achill WWTP to a cake with a dry solids concentration of between 15 and 18 %. Final disposal is currently being conducted by Ormonde Waste, Recycling and Organics, Ballinalacken, Attanagh. The Purteen Wastewater Treatment Plant has a capacity of 4000 PE and is currently operated by Mayo County Council. The average volume currently discharged from the municipal effluent stream is 562.5 cu. m/day (2500 PE @ 225L/PE Day). This is equivalent to an average daily discharge of 162 Kg B.D. It is not anticipated that the municipal effluent will increase appreciably in the near future. The Wastewater Treatment Plant has adequate capacity to handle the effluent from the current population. The effluent quality complies with the discharge standards. Emissions from the Treatment Works are discharged to the Atlantic Ocean (through an outfall labelled SW1). This is the primary discharge point. A storm overflow discharges all flows in excess of 3 DWF to the sea. This is labelled SWS and is emitted through the same pipe as the primary discharge.
PS1 Keel Pumping Station: (63,776E, 304,779N) To protect Keel Strand there is no storm water overflow at the Keel Pumping Station. There is however a large Balancing Tank with a capacity of 320 cu. m and a standby generator. There are 3 no. submersible pumps, i.e. 1 no. Duty and 2 no. Standby.
PS2 Dookinelly Pumping Station (65,711 E, 304, 846 N) There are 2 no. submersible pumps i.e. 1 no. Duty and 1 no. Standby. There is a storage capacity of 6 cu. m. There is a 300 mm diameter emergency overflow SW3.
PS3 Dooagh No 1 Pumping Station (60,349 E, 304,924 N) To protect Dooagh Strand there is a total pumping capacity at this Pumping Station for 12 times D.W.F. There is an emergency overflow SW4 which comprises a 450 mm diameter pipe with a non return valve to a percolator at the shore. There are 2 no. foul pumps i.e. 1 no. Duty and 1 no. Standby. There is a storage capacity of 75 cu. m.
PS4 Dooagh No 2 Pumping Station (60,020N, 304,633E) There are 2 no. submersible pumps i.e. 1 no. Duty and 1 no. Standby. There is a storage capacity of 10 cu. m. There is a 300 mm diameter emergency overflow with a non return valve SW2.
Raw Waste Water
Treated Effluent
Inlet
to Atlantic Ocean
MechanicalScreen
ScreeningTreatment
Off-siteDisposal
Sludge Disposalto Land
(1094m )2 No.
3
GritTrap
AerationTanks
SludgeDewatering
TankHoldingSludge
PumpSludge
ValveDistribution
(10m dia)
FinalSettlement
Tanks2 No.
DryingSludge
Beds
Sludge Disposalto Land
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
Drg. Title:
Achill Wastewater Treatment PlantProcess Flow Diagram for Current Operation
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
NTS 01/09/08
Map C.1.1. A
L. Collier S. Verity T. Reidy
LEGENDReturn LiquorsRaw WastewaterScreenings / GritStormwaterSludgeFinal EffluentFlow to Secondary TanksDewatered Sludge
Reservoir
HWM
HWM
CF
UN
D
!!
Sludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying BedsSludge Drying Beds
Sludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering BuildingSludge Dewatering Building
Sludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding TankSludge Holding Tank
Control BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl BuildingControl Building
Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2Aeration Tank No.2
Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1Aeration Tank No.1
Sludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge PumpSludge Pump
Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1Final Settlement Tank No.1
Inlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet WorksInlet Works
Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2Final Settlement Tank No.2
SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW5SW5SW5SW5SW5SW5SW5SW5SW5
SP1SP1SP1SP1SP1SP1SP1SP1SP1
SP2SP2SP2SP2SP2SP2SP2SP2SP2
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Pumping Station
Achill WastewaterTreatment Plant Boundary
Drg. Title:
Achill Wastewater Treatment PlantLayout Plan
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 750 01/09/08
Map C1.2 A
L. Collier S. Verity T. Reidy
(3Nr)(1Nr)
(1Nr)(1Nr)
(4Nr)
(1Nr)
Achill Waste Water Discharge Application Attachment C.2
C.2/1
C.2 Outline Description of Outfall Design and Construction 1.0 Primary Discharge Point (P) 1.1 SW1 Location: Purteen, Achill Island, Co. Mayo 61,942E – 303,731N Receiving Water: Atlantic Ocean Originates: Final treated effluent from Achill wastewater treatment plant Invert Level: 0.0m Pipe Size: 500mm diameter Design Criteria: Open discharge to sea Construction Detail: Open discharge to sea 2.0 Secondary Discharge Points 2.1 SW2 Location: Emergency overflow from Dooagh No.2 Pumping Station 59,984E – 304,590N Receiving Water: Atlantic Ocean Originates: Emergency overflow from pumping station. Only anticipated if
there is a power cut, the pumping equipment breaks down or if maintenance work needs to carried out
Pipe Size: 300mm diameter with non return valve Design Criteria: Emergency/safety overflow – only to operate in case of pump
failure Construction Detail: 300mm diameter with non return valve 2.2 SW3 Location: Emergency overflow from Dookinelly Pumping Station 65,717E – 304,829N Receiving Water: Atlantic Ocean via Gallaghers River Originates: Emergency overflow from pumping station. Only anticipated if
there is a power cut, the pumping equipment breaks down or if maintenance work needs to be carried out
Pipe Size: 300mm diameter with non return valve Design Criteria: Emergency/safety overflow – only to operate in case of pump
failure Construction Detail: 300mm diameter with non return valve
Achill Waste Water Discharge Application Attachment C.2
C.2/2
2.3 SW4 Location: Emergency overflow from Dooagh No.1 Pumping Station 60,459E – 304,855N Receiving Water: Atlantic Ocean Originates: Emergency overflow from pumping station. Only anticipated if
there is a power cut, the pumping station equipment breaks down or if maintenance work needs to be carried out
Pipe Size: 450mm diameter Design Criteria: Emergency/safety overflow – only to operate in case of pump
failure Construction Detail: 450mm diameter to percolator manhole 3.0 Storm Water Overflow Discharge Point 3.1 SW5 Location: Purteen, Achill Island Co. Mayo 61,942E – 303,731N Receiving Water: Atlantic Ocean Originates: Storm water overflow from Achill wastewater treatment plant Pipe Size: 500mm diameter Design Criteria: Flows in excess of three times the dry weather flow are diverted to
a storm water overflow pipe which connects into the primary discharge pipe.
Construction Detail: Shares the same outfall as the primary discharge point (SW1)
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 1
WWD Licence Application
Agglomeration details
Contact details
Leading Local Authority Mayo County CouncilCo-ApplicantsAgglomeration Achill Waste Water Treatment PlantPopulation Equivalent 4000Level of Treatment SecondaryTreatment plant address Achill Waste Water Treatment Plant
PurteenAchill IslandCounty Mayo
Grid Ref (12 digits, 6E, 6N) 062035 / 303731 (Verifed using GPS)EPA Reference No:
Contact Name: Paddy MahonContact Address: Director of Services
Ballina Town CouncilCivic OfficesArran PlaceCo. Mayo
Contact Number: 096 76100Contact Fax: 096 76199Contact Email: pmahon@mayococo.ie
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 2
WWD Licence Application Annex I
Table D.1(i)(a): EMISSIONS TO SURFACE/GROUND WATERS (Primary Discharge Point)
Discharge Point Code: SW-1
Emission Details:
Local Authority Ref No: SW1 (P) - Sampled at SP2Source of Emission: Achill Wastewater Treatment PlantLocation: Purteen, Achill IslandGrid Ref (12 digits, 6E, 6N) 061942 / 303731 (Verifed using GPS)Name of Receiving waters: Atlanic OceanRiver Basin District Western RBDDesignation of Receiving Waters: Achill Head S.A.C. & close to Inishgallon N.H.A.Flow Rate in Receiving Waters: 0 m3.sec-1 Dry Weather Flow
0 m3.sec-1 95% Weather Flow
(i)Volume emittedNormal/day 562.5 m3 Maximum/day 1687.5 m3
Maximumrate/hour
70.3125 m3 Period of emission(avg)
60 min/hr 24 hr/day 365 day/yr
Dry Weather Flow 0.0065104167m3/sec
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 3
WWD Licence Application Annex I
Table D.1(i)(b): EMISSIONS TO SURFACE/GROUND WATERS - Characteristics of The Emission
(Primary Discharge Point)
Discharge Point Code: SW-1
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
pH pH Grab =7.3
Temperature °C Grab =16.6
Electrical Conductivity (@ 25°C) µS/cm Grab =725
Suspended Solids mg/l Grab =3 1.6875
Ammonia (as N) mg/l Grab =0.022 0.012375
Biochemical Oxygen Demand mg/l Grab =5 2.8125
Chemical Oxygen Demand mg/l Grab =35 19.6875
Total Nitrogen (as N) mg/l Grab =0.044 0.02475
Nitrite (as N) mg/l Grab =0.097 0.0545625
Nitrate (as N) mg/l Grab =28.023 15.7629375
Total Phosphorous (as P) mg/l Grab =0.11 0.061875
OrthoPhosphate (as P) mg/l Grab =0.047 0.0264375
Sulphate (SO4) mg/l Grab =71.59 40.269375
Phenols (Sum) µg/l Grab <0.027 0.000015187
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 4
WWD Licence Application Annex I
Table D.1(i)(c): DANGEROUS SUBSTANCE EMISSIONS TO SURFACE/GROUND WATERS -
Characteristics of The Emission (Primary Discharge Point)
Discharge Point Code: SW-1
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
Atrazine µg/l Grab <0.003 0.000001687
Dichloromethane µg/l Grab <1 0.0005625
Simazine µg/l Grab =0.013 0.000007312
Toluene µg/l Grab <1 0.0005625
Tributyltin µg/l Grab <0.02 0.00001125
Xylenes µg/l Grab <1 0.0005625
Arsenic µg/l Grab <0.5 0.00028125
Chromium µg/l Grab <0.5 0.00028125
Copper µg/l Grab =1 0.0005625
Cyanide µg/l Grab =2.3 0.00129375
Flouride µg/l Grab =450 0.253125
Lead µg/l Grab <0.5 0.00028125
Nickel µg/l Grab =2 0.001125
Zinc µg/l Grab <5 0.0028125
Boron µg/l Grab =14 0.007875
Cadmium µg/l Grab <0.5 0.00028125
Mercury µg/l Grab <0.05 0.000028125
Selenium µg/l Grab <0.5 0.00028125
Barium µg/l Grab =37 0.0208125
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 5
WWD Licence Application Annex I
Table D.1(ii)(a): EMISSIONS TO SURFACE/GROUND WATERS (Secondary Discharge Point)
Discharge Point Code: SW-2
Emission Details:
Local Authority Ref No: Dooagh No.2(PS 4),Source of Emission: Achill Wastewater Treatment PlantLocation: DooaghGrid Ref (12 digits, 6E, 6N) 059984 / 304590 (Verifed using GPS)Name of Receiving waters: Atlantic OceanRiver Basin District Western RBDDesignation of Receiving Waters: Achill Head S.A.C. & close to Inishgallon N.H.A.Flow Rate in Receiving Waters: 0 m3.sec-1 Dry Weather Flow
0 m3.sec-1 95% Weather Flow
(i)Volume emittedNormal/day 0 m3 Maximum/day 0 m3
Maximumrate/hour
0 m3 Period of emission(avg)
0 min/hr 0 hr/day 0 day/yr
Dry Weather Flow 0 m3/sec
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 6
WWD Licence Application Annex I
Table D.1(ii)(b): EMISSIONS TO SURFACE/GROUND WATERS - Characteristics of The
Emission (Secondary Discharge Point)
Discharge Point Code: SW-2
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
pH pH Grab =0
Temperature °C Grab =0
Electrical Conductivity (@ 25°C) µS/cm Grab =0
Suspended Solids mg/l Grab =0 0
Ammonia (as N) mg/l Grab =0 0
Biochemical Oxygen Demand mg/l Grab =0 0
Chemical Oxygen Demand mg/l Grab =0 0
Total Nitrogen (as N) mg/l Grab =0 0
Nitrite (as N) mg/l Grab =0 0
Nitrate (as N) mg/l Grab =0 0
Total Phosphorous (as P) mg/l Grab =0 0
OrthoPhosphate (as P) mg/l Grab =0 0
Sulphate (SO4) mg/l Grab =0 0
Phenols (Sum) µg/l Grab =0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 7
WWD Licence Application Annex I
Table D.1(ii)(c): DANGEROUS SUBSTANCE EMISSIONS TO SURFACE/GROUND WATERS -
Characteristics of The Emission (Secondary Discharge Point)
Discharge Point Code: SW-2
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
Atrazine µg/l Grab =0 0
Dichloromethane µg/l Grab =0 0
Simazine µg/l Grab =0 0
Toluene µg/l Grab =0 0
Tributyltin µg/l Grab =0 0
Xylenes µg/l Grab =0 0
Arsenic µg/l Grab =0 0
Chromium µg/l Grab =0 0
Copper µg/l Grab =0 0
Cyanide µg/l Grab =0 0
Flouride µg/l Grab =0 0
Lead µg/l Grab =0 0
Nickel µg/l Grab =0 0
Zinc µg/l Grab =0 0
Boron µg/l Grab =0 0
Cadmium µg/l Grab =0 0
Mercury µg/l Grab =0 0
Selenium µg/l Grab =0 0
Barium µg/l Grab =0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 8
WWD Licence Application Annex I
Table D.1(ii)(a): EMISSIONS TO SURFACE/GROUND WATERS (Secondary Discharge Point)
Discharge Point Code: SW-3
Emission Details:
Local Authority Ref No: Dookinelly(PS 2)Source of Emission: Achill Wastewater Treatment PlantLocation: DookinellyGrid Ref (12 digits, 6E, 6N) 065717 / 304829 (Verifed using GPS)Name of Receiving waters: Atlantic OceanRiver Basin District Western RBDDesignation of Receiving Waters: Achill Head S.A.C. & close to Inishgallon N.H.A.Flow Rate in Receiving Waters: 0 m3.sec-1 Dry Weather Flow
0 m3.sec-1 95% Weather Flow
(i)Volume emittedNormal/day 0 m3 Maximum/day 0 m3
Maximumrate/hour
0 m3 Period of emission(avg)
0 min/hr 0 hr/day 0 day/yr
Dry Weather Flow 0 m3/sec
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 9
WWD Licence Application Annex I
Table D.1(ii)(b): EMISSIONS TO SURFACE/GROUND WATERS - Characteristics of The
Emission (Secondary Discharge Point)
Discharge Point Code: SW-3
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
pH pH Grab =0
Temperature °C Grab =0
Electrical Conductivity (@ 25°C) µS/cm Grab =0
Suspended Solids mg/l Grab =0 0
Ammonia (as N) mg/l Grab =0 0
Biochemical Oxygen Demand mg/l Grab =0 0
Chemical Oxygen Demand mg/l Grab =0 0
Total Nitrogen (as N) mg/l Grab =0 0
Nitrite (as N) mg/l Grab =0 0
Nitrate (as N) mg/l Grab =0 0
Total Phosphorous (as P) mg/l Grab =0 0
OrthoPhosphate (as P) mg/l Grab =0 0
Sulphate (SO4) mg/l Grab =0 0
Phenols (Sum) µg/l Grab =0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 10
WWD Licence Application Annex I
Table D.1(ii)(c): DANGEROUS SUBSTANCE EMISSIONS TO SURFACE/GROUND WATERS -
Characteristics of The Emission (Secondary Discharge Point)
Discharge Point Code: SW-3
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
Atrazine µg/l Grab =0 0
Dichloromethane µg/l Grab =0 0
Simazine µg/l Grab =0 0
Toluene µg/l Grab =0 0
Tributyltin µg/l Grab =0 0
Xylenes µg/l Grab =0 0
Arsenic µg/l Grab =0 0
Chromium µg/l Grab =0 0
Copper µg/l Grab =0 0
Cyanide µg/l Grab =0 0
Flouride µg/l Grab =0 0
Lead µg/l Grab =0 0
Nickel µg/l Grab =0 0
Zinc µg/l Grab =0 0
Boron µg/l Grab =0 0
Cadmium µg/l Grab =0 0
Mercury µg/l Grab =0 0
Selenium µg/l Grab =0 0
Barium µg/l Grab =0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 11
WWD Licence Application Annex I
Table D.1(ii)(a): EMISSIONS TO SURFACE/GROUND WATERS (Secondary Discharge Point)
Discharge Point Code: SW-4
Emission Details:
Local Authority Ref No: Dooagh No.1(PS 3)Source of Emission: Achill Wastewater Treatment PlantLocation: DooaghGrid Ref (12 digits, 6E, 6N) 060459 / 304855 (Verifed using GPS)Name of Receiving waters: Atlantic OceanRiver Basin District Western RBDDesignation of Receiving Waters: Achill Head S.A.C. & close to Inishgallon N.H.A.Flow Rate in Receiving Waters: 0 m3.sec-1 Dry Weather Flow
0 m3.sec-1 95% Weather Flow
(i)Volume emittedNormal/day 0 m3 Maximum/day 0 m3
Maximumrate/hour
0 m3 Period of emission(avg)
0 min/hr 0 hr/day 0 day/yr
Dry Weather Flow 0 m3/sec
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 12
WWD Licence Application Annex I
Table D.1(ii)(b): EMISSIONS TO SURFACE/GROUND WATERS - Characteristics of The
Emission (Secondary Discharge Point)
Discharge Point Code: SW-4
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
pH pH Grab =0
Temperature °C Grab =0
Electrical Conductivity (@ 25°C) µS/cm Grab =0
Suspended Solids mg/l Grab =0 0
Ammonia (as N) mg/l Grab =0 0
Biochemical Oxygen Demand mg/l Grab =0 0
Chemical Oxygen Demand mg/l Grab =0 0
Total Nitrogen (as N) mg/l Grab =0 0
Nitrite (as N) mg/l Grab =0 0
Nitrate (as N) mg/l Grab =0 0
Total Phosphorous (as P) mg/l Grab =0 0
OrthoPhosphate (as P) mg/l Grab =0 0
Sulphate (SO4) mg/l Grab =0 0
Phenols (Sum) µg/l Grab =0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 13
WWD Licence Application Annex I
Table D.1(ii)(c): DANGEROUS SUBSTANCE EMISSIONS TO SURFACE/GROUND WATERS -
Characteristics of The Emission (Secondary Discharge Point)
Discharge Point Code: SW-4
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Substance As discharged
Unit ofMeasurement
Sampling Method Max Daily Avg. kg/day
Atrazine µg/l Grab =0 0
Dichloromethane µg/l Grab =0 0
Simazine µg/l Grab =0 0
Toluene µg/l Grab =0 0
Tributyltin µg/l Grab =0 0
Xylenes µg/l Grab =0 0
Arsenic µg/l Grab =0 0
Chromium µg/l Grab =0 0
Copper µg/l Grab =0 0
Cyanide µg/l Grab =0 0
Flouride µg/l Grab =0 0
Lead µg/l Grab =0 0
Nickel µg/l Grab =0 0
Zinc µg/l Grab =0 0
Boron µg/l Grab =0 0
Cadmium µg/l Grab =0 0
Mercury µg/l Grab =0 0
Selenium µg/l Grab =0 0
Barium µg/l Grab =0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 14
WWD Licence Application Annex I
Table D.1(iii)(a): EMISSIONS TO SURFACE/GROUND WATERS (Storm Overflow)
Discharge Point Code: SW-5
Emission Details:
Local Authority Ref No:Source of Emission: Achill Wastewater Treatment PlantLocation: Purteen, Achill IslandGrid Ref (12 digits, 6E, 6N) 061942 / 303731 (Verifed using GPS)Name of Receiving waters: Atlantic OceanRiver Basin District Western RBDDesignation of Receiving Waters: Achill Head S.A.C. & close to Inishgallon N.H.A.Flow Rate in Receiving Waters: 0 m3.sec-1 Dry Weather Flow
0 m3.sec-1 95% Weather Flow
(i)Volume emittedNormal/day 0 m3 Maximum/day 0 m3
Maximumrate/hour
0 m3 Period of emission(avg)
0 min/hr 0 hr/day 0 day/yr
Dry Weather Flow 0 m3/sec
D.2 Tabular Data on Discharge Points
Point Code Point Type Local Authority Receiving Water Body Type Receiving Water Body Name Protected Area Type Easting Northing
SW1(P) Primary Mayo Co.Co. Coastal Atlantic Ocean SeeD(i)(a) 61,942 303,731
SW2 Secondary Mayo Co.Co. Coastal Atlantic Ocean SeeD(ii)(a) 59,984 304,590
SW3 Secondary Mayo Co.Co. Coastal Atlantic Ocean SeeD(ii)(a) 65,717 304,829
SW4 Secondary Mayo Co.Co. Coastal Atlantic Ocean SeeD(ii)(a) 60,459 304,855
SW5 Stormwater Mayo Co.Co. Coastal Atlantic Ocean SeeD(iii)(a) 61,942 303,731
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 15
WWD Licence Application Annex I
TABLE E.1(i): WASTE WATER FREQUENCY AND QUANTITY OF DISCHARGE – Primary and
Secondary Discharge Points
Identification Code for Discharge point Frequency of discharge (days/annum) Quantity of Waste Water Discharged
(m3/annum)
SW-1 365 205312.5
SW-2 0 0
SW-3 0 0
SW-4 0 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 16
WWD Licence Application Annex I
TABLE E.1(ii): WASTE WATER FREQUENCY AND QUANTITY OF DISCHARGE – Storm Water
Overflows
Identification Code for Dischargepoint
Frequency of discharge(days/annum)
Quantity of Waste WaterDischarged (m3/annum)
Complies with Definition of StormWater Overflow
SW-5 0 0 Yes
Attachment E.2
Mayo County Council carries out sampling at Achill Island Waste Water Treatment Plant on a
monthly basis. This sampling is carried out on behalf of Mayo County Council by Complete
Laboratory Solutions (CLS) Ros Muc, Co. Galway. The following parameters are sampled at
both the inflow and outflow:
Total Phosphorus as P (sw)
Total Phosphorus as P (d)
Total Nitrogen as N (sw)
Total Nitrogen as N (d)
TON as N (sw)
TON as N (d)
Temperature
Suspended Solids (d)
Suspended Solids
pH
Orthophosphate as P
Dissolved Oxygen (%)
COD
BOD (with Nitrification inhibition)
BOD (sw)
Ammonium as NH4 (sw)
Ammonium as NH4 (d)
The external laboratory has INAB ISO 17025 accreditation for the following parameters:
pH
Chemical Oxygen Demand
Biochemical Oxygen Demand
Suspended Solids
TON as N
Orthophosphate as P
Ammonium as NH4
CF
19.2
Gubalennaun beg
LWM
LWM
QuayPier
UNDHWM
UND
LWM
Reservoir
HWM
HWM
CF
UN
D
!!SW5SW5SW5SW5SW5SW5SW5SW5SW5SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)SW1(P)
SP2SP2SP2SP2SP2SP2SP2SP2SP2
SP1SP1SP1SP1SP1SP1SP1SP1SP1
Aras An Chontae,The Mall, Castlebar, Co. Mayo, IrelandTel: (094) 904 7149Fax: 094 904 7192
Mayo County Council G.I.S. Section
Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2008/10 CCMA / Mayo County Council. © Ordnance Survey Ireland , 2008.
!!!
LEGEND
Inlet Sampling PointOutlet Sampling Point
Primary Discharge PointSecondary Discharge PointStormwater Discharge Point
Achill WastewaterTreatment Plant Boundary
Pumping Station
Drg. Title:
Achill Wastewater Treatment PlantOverview of Sampling and Monitoring Points
Project:
Waste Water Discharge Licence Application
Scale: Date:
Drg. Nr: Rev:
Drawn By: Checked By: Approved By:
1: 2,500 28/08/08
Map E.2. A
L. Collier S. Verity T. Reidy
(4Nr)
(1Nr)
(1Nr)
(1Nr)(3Nr)
(1Nr)
Note: There are no upstream or downstreammonitoring points at Achill WWTP.
Atlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic OceanAtlantic Ocean
PT_CD PT_TYPE MON_TYPE EASTING NORTHING VERIFIEDSP1 Inlet Sampling Point Sampling 62089E 303837N GPS EnvSP2 Outlet Sampling Point Sampling 62026E 303808N GPS
Achill Waste Water Discharge Application Attachment E.4
E.4/1
E.4 Sampling Data Achill wastewater treatment plant discharges final effluent to comply with the Urban Waste Water Treatment Directive 91/271/EEC, which sets standards for final effluent being discharged to the receiving waters as follows: Biochemical Oxygen Demand 25mg/l O2 Chemical Oxygen Demand 125mg/l O2 Total Suspended Solids 35mg/l Under the Urban Waste Water Treatment Regulations, 2001 the minimum number of samples required for a plant this size is 12 samples during the first year; four samples in subsequent years, if it is shown that the water during the first year complies with the provisions of these Regulations; if one sample of the four fails, 12 samples must be taken in the year that follows.
Achill WWTP Average Ammonium(NH4) 7.3122 mg/l BOD 8.2444 mg/l Chemical Oxygen Demand 30.5556 mg/l Dissolved Oxygen % Saturation 67.6875 % Saturation Ortho-phosphate 0.7022 mg/l pH 7.3111 pH units Suspended Solids 5.5556 mg/l Temperature 12.8 °C Total Nitrogen 13.3189 mg/l Total Oxidised Nitrogen 3.4733 mg/l Total Phosphorus 0.7913 mg/l
Attachment F.1
Mayo County Council will carry out an “appropriate assessment” as part of the
Waste Water Licensing Discharge process for Achill Island.
The extent of the assessment however will be scoped with the National Parks &
Wildlife Service.
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 17
WWD Licence Application Annex I
TABLE F.1(i)(a): SURFACE/GROUND WATER MONITORING
Primary Discharge Point
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Discharge Point Code: SW-1MONITORING POINT CODE: aSW-1aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (mg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
pH = 0 Grab 0
Temperature = 0 Grab 0
Electrical Conductivity (@25°C)
= 0 Grab 0
Suspended Solids = 0 Grab 0
Ammonia (as N) = 0 Grab 0
Biochemical Oxygen Demand = 0 Grab 0
Chemical Oxygen Demand = 0 Grab 0
Dissolved Oxygen = 0 Grab 0
Hardness (as CaCO3) = 0 Grab 0
Total Nitrogen (as N) = 0 Grab 0
Nitrite (as N) = 0 Grab 0
Nitrate (as N) = 0 Grab 0
Total Phosphorous (as P) = 0 Grab 0
OrthoPhosphate (as P) = 0 Grab 0
Sulphate (SO4) = 0 Grab 0
Phenols (Sum) = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 18
WWD Licence Application Annex I
TABLE F.1(i)(b): SURFACE/GROUND WATER MONITORING (Dangerous Substances)
Primary Discharge Point
Discharge Point Code: SW-1MONITORING POINT CODE: aSW-1aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (µg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
Atrazine = 0 Grab 0
Dichloromethane = 0 Grab 0
Simazine = 0 Grab 0
Toluene = 0 Grab 0
Tributyltin = 0 Grab 0
Xylenes = 0 Grab 0
Arsenic = 0 Grab 0
Chromium = 0 Grab 0
Copper = 0 Grab 0
Cyanide = 0 Grab 0
Flouride = 0 Grab 0
Lead = 0 Grab 0
Nickel = 0 Grab 0
Zinc = 0 Grab 0
Boron = 0 Grab 0
Cadmium = 0 Grab 0
Mercury = 0 Grab 0
Selenium = 0 Grab 0
Barium = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 19
WWD Licence Application Annex I
TABLE F.1(ii)(a): SURFACE/GROUND WATER MONITORING
Secondary Discharge Point
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Discharge Point Code: SW-4MONITORING POINT CODE: aSW-4aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (mg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
pH = 0 Grab 0
Temperature = 0 Grab 0
Electrical Conductivity (@25°C)
= 0 Grab 0
Suspended Solids = 0 Grab 0
Ammonia (as N) = 0 Grab 0
Biochemical Oxygen Demand = 0 Grab 0
Chemical Oxygen Demand = 0 Grab 0
Dissolved Oxygen = 0 Grab 0
Hardness (as CaCO3) = 0 Grab 0
Total Nitrogen (as N) = 0 Grab 0
Nitrite (as N) = 0 Grab 0
Nitrate (as N) = 0 Grab 0
Total Phosphorous (as P) = 0 Grab 0
OrthoPhosphate (as P) = 0 Grab 0
Sulphate (SO4) = 0 Grab 0
Phenols (Sum) = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 20
WWD Licence Application Annex I
TABLE F.1(ii)(b): SURFACE/GROUND WATER MONITORING (Dangerous Substances)
Secondary Discharge Point
Discharge Point Code: SW-4MONITORING POINT CODE: aSW-4aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (µg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
Atrazine = 0 Grab 0
Dichloromethane = 0 Grab 0
Simazine = 0 Grab 0
Toluene = 0 Grab 0
Tributyltin = 0 Grab 0
Xylenes = 0 Grab 0
Arsenic = 0 Grab 0
Chromium = 0 Grab 0
Copper = 0 Grab 0
Cyanide = 0 Grab 0
Flouride = 0 Grab 0
Lead = 0 Grab 0
Nickel = 0 Grab 0
Zinc = 0 Grab 0
Boron = 0 Grab 0
Cadmium = 0 Grab 0
Mercury = 0 Grab 0
Selenium = 0 Grab 0
Barium = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 21
WWD Licence Application Annex I
TABLE F.1(ii)(a): SURFACE/GROUND WATER MONITORING
Secondary Discharge Point
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Discharge Point Code: SW-2MONITORING POINT CODE: aSW-2aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (mg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
pH = 0 Grab 0
Temperature = 0 Grab 0
Electrical Conductivity (@25°C)
= 0 Grab 0
Suspended Solids = 0 Grab 0
Ammonia (as N) = 0 Grab 0
Biochemical Oxygen Demand = 0 Grab 0
Chemical Oxygen Demand = 0 Grab 0
Dissolved Oxygen = 0 Grab 0
Hardness (as CaCO3) = 0 Grab 0
Total Nitrogen (as N) = 0 Grab 0
Nitrite (as N) = 0 Grab 0
Nitrate (as N) = 0 Grab 0
Total Phosphorous (as P) = 0 Grab 0
OrthoPhosphate (as P) = 0 Grab 0
Sulphate (SO4) = 0 Grab 0
Phenols (Sum) = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 22
WWD Licence Application Annex I
TABLE F.1(ii)(b): SURFACE/GROUND WATER MONITORING (Dangerous Substances)
Secondary Discharge Point
Discharge Point Code: SW-2MONITORING POINT CODE: aSW-2aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (µg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
Atrazine = 0 Grab 0
Dichloromethane = 0 Grab 0
Simazine = 0 Grab 0
Toluene = 0 Grab 0
Tributyltin = 0 Grab 0
Xylenes = 0 Grab 0
Arsenic = 0 Grab 0
Chromium = 0 Grab 0
Copper = 0 Grab 0
Cyanide = 0 Grab 0
Flouride = 0 Grab 0
Lead = 0 Grab 0
Nickel = 0 Grab 0
Zinc = 0 Grab 0
Boron = 0 Grab 0
Cadmium = 0 Grab 0
Mercury = 0 Grab 0
Selenium = 0 Grab 0
Barium = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 23
WWD Licence Application Annex I
TABLE F.1(ii)(a): SURFACE/GROUND WATER MONITORING
Secondary Discharge Point
For Orthophosphate: this monitoring should be undertaken on a sample filtered on 0.45m filter paper
For Phenols: USEPA Method 604, AWWA Standard Method 6240, or equivalent.
Discharge Point Code: SW-3MONITORING POINT CODE: aSW-3aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (mg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
pH = 0 Grab 0
Temperature = 0 Grab 0
Electrical Conductivity (@25°C)
= 0 Grab 0
Suspended Solids = 0 Grab 0
Ammonia (as N) = 0 Grab 0
Biochemical Oxygen Demand = 0 Grab 0
Chemical Oxygen Demand = 0 Grab 0
Dissolved Oxygen = 0 Grab 0
Hardness (as CaCO3) = 0 Grab 0
Total Nitrogen (as N) = 0 Grab 0
Nitrite (as N) = 0 Grab 0
Nitrate (as N) = 0 Grab 0
Total Phosphorous (as P) = 0 Grab 0
OrthoPhosphate (as P) = 0 Grab 0
Sulphate (SO4) = 0 Grab 0
Phenols (Sum) = 0 Grab 0
WWD Licence Application - Achill Waste Water Treatment Plant - Page: 24
WWD Licence Application Annex I
TABLE F.1(ii)(b): SURFACE/GROUND WATER MONITORING (Dangerous Substances)
Secondary Discharge Point
Discharge Point Code: SW-3MONITORING POINT CODE: aSW-3aGrid Ref (12 digits, 6E, 6N) 000000 / 000000
Parameter Results (µg/l) Samplingmethod
Limit ofQuantitation
Analysismethod /technique
01/01/50
Atrazine = 0 Grab 0
Dichloromethane = 0 Grab 0
Simazine = 0 Grab 0
Toluene = 0 Grab 0
Tributyltin = 0 Grab 0
Xylenes = 0 Grab 0
Arsenic = 0 Grab 0
Chromium = 0 Grab 0
Copper = 0 Grab 0
Cyanide = 0 Grab 0
Flouride = 0 Grab 0
Lead = 0 Grab 0
Nickel = 0 Grab 0
Zinc = 0 Grab 0
Boron = 0 Grab 0
Cadmium = 0 Grab 0
Mercury = 0 Grab 0
Selenium = 0 Grab 0
Barium = 0 Grab 0
Achill Waste Water Discharge Application Attachment G.1
G.1/1
G.1 Compliance with Council Directives Achill wastewater treatment plant and agglomeration were planned and designed in such a way that the emissions from the agglomeration would comply with /not result in the contravention of all relevant Council Directives. All upgrades, expansions and improvements to Achill wastewater treatment plant and agglomerations in the future will ensure that the emissions from the agglomeration would comply with/not result in the contravention of the;
• Dangerous Substance Directive 2006/11/EC • Water Framework Directive 2000/60/EC • Birds Directive 79/409/EEC • Groundwater Directive 80/68/EEC & 2006/118/EC • Drinking Water Directive 80/778/EEC • Urban Waste Water Treatment Directive 91/271/EEC • Habitats Directive 92/43/EEC • Environmental Liabilities Directive 2004/35/EC • Bathing Water Directive 76/160/EEC • Shellfish Directive 79/923/EEC
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