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Achill Sound Waste Water Discharge Application Attachment A.1 ATTACHMENT A.1 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 licence for the Achill Sound Waste Water Treatment Plant at Achill Sound and Agglomeration in compliance with the Waste Water Discharge (Authorisation) Regulations 2007 (S.I. No. 684 of 2007). Under Regulation 5. (1), of the above Regulations, a water services authority shall at least 6 months before the date on which a waste water works becomes operational, make an application to the Agency for a licence authorising the waste water discharges from those works. The Achill Sound Waste Water Treatment Plant falls under this category as it is currently under construction and is due to be commissioned/operational by May 2010. Prior to the above plant no collection system or treatment plant existed in Achill Sound. 2. Description of Achill Sound Waste Water Works use. The Achill Sound Waste Water Treatment Plant (WWTP) has been designed to treat wastewater from an equivalent population of 1,200 persons and will be operated by Response- other Group. Treated effluent from the Plant will be dischargedonly. to the Atlantic Ocean (Primary Discharge Point) SW1 (P). any for The scheme as a whole includes for the construction of a scheme of Main Sewers to collect foul effluent from the Achill Sound agglomerpurposesation and convey the flow via 5 No. Pumping Stations, to the new Waste Water Treatment Plant, the names of which are as follows: - required Pumping Station Unique Point Code Name inspection owner St. Finions PS1 For Sraheens No. 1 PS2 Sraheens No. 2 PS3 Achill Soundcopyright Bridge PS4 Old Railwayof PS5 The main treatment processes within the WWTP will be: Inlet Screens, Aerobic biological treatment (2 No. SequencingConsent Batch Reactors) followed by UV Sterilisation Chamber. 3. Sources of Emissions There will be 1 No. Primary Discharge Point (SW1 (P)), discharging to the Atlantic Ocean. This discharge will originate from the Achill Sound Wastewater Treatment Plant. The treated effluent from the WWTP will discharge from the Tidal Tank to a Diffuser Head located 190m from the foreshore. This arrangement will allow the treated effluent to discharge only on high tides, when maximum dilution can occur. There will be 6 other Secondary (emergency) Discharge Points discharging to the Atlantic Ocean. These discharges will originate from the WWTP Inlet Pumps and the 5 No. Pumping Stations (named in Table above), located throughout the catchment. Discharges from these Points are only anticipated if there is a prolonged power cut, pumping equipment breaks down or if maintenance work is required i.e. these points are emergency discharges only. A.1 Page 1 of 2 Achill Sound Waste Water Discharge Application Attachment A.1 4. Nature and Quantity of Foreseeable Emissions The wastewater treatment plant is designed to treat the wastewater to the standards required by the Urban Wastewater Treatment Regulations i.e. BOD 25 mg/l, COD 125mg/l and SS 35mg/l. The anticipated average volume discharged from the municipal effluent stream of the Treatment Plant is estimated at 215.78 m3/day (959 P.E. @ 225 l/P.E./day). This will be equivalent to an average daily discharge of 5.4 kg/day BOD, 7.55 kg/day Suspended Solids. 5. Technology for Prevention or Reduction of Emissions Emissions from the Wastewater Treatment Plant will be monitored and the treatment process will be constantly adjusted to maximise the efficiency of the plant in removing pollutants. 6. Supervision of Works The Wastewater Treatment Plant will be operated and supervised by Response-Group. 7. Measures planned to monitor emissions to the Environment It is proposed to carry out routine sampling six times a year, by Response-Group.use. other only. any for purposes required inspection owner For copyright of Consent A.1 Page 2 of 2 Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2009/17 CCMA / Mayo County Council. © Ordnance Survey Ireland, 2009. Legend Agglomeration Boundary Achill Sound Wastewater Treatment Plant Boundary Cloodowenroe HW M Achill Sound M W L U N D Achill Sound use. Illannamolt other M W L only. any M W H for M W H purposes M W L na how nna Bu Gubbleannahooey required Resrvoir M W L inspection owner M W L L Bleannahooey Strand W M Boleycloghagh Drawn By: Checked By: Approved By: Holy Trinity Church For (Dissused) C. Worsfold C. Scahill T.Reidy GS Stn M Achill W H M W H Slipway Court House HWM Sports Ground Glendarrary Achill Br. Cottages Gubanardmore Rev: Dorrary Point Drg. No: H W M copyrightHotel Slipway H W of M Map B.1. A L W M LW M M W College H Scale: Date: Achill Sound Radharc na Mara M 1 : 10,000 LW rveen M ntyga HW Blea M LW (Inset 1 : 50,000) November 2009 PO M Library W L Hotel h g M u fl W n H Consent u a d id F Church Health (Cath) Center Project: Fire Community Station Nursing Unit St Fionnans Close Waste Water Discharge Licence Application Community Nurseing Unit School Drg. Title: Health Centre House of Prayer Gubnahamoda Achill Sound Wastewater Treatment Plant M HW Agglomeration Bárr na Farraige Mayo County Council M W H Water Services Section Aras An Chontae The Mall, Castlebar, D UN Co. Mayo, Ireland Tel: 094 9047454 Fax: 094 9047398 M W L M M W W L H M W L Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2009/17 CCMA / Mayo County Council. © Ordnance Survey Ireland, 2009. Legend Agglomeration Boundary Achill Sound Wastewater Treatment Plant Boundary C F use. SBR 2 other only. SBR 1 any Inlet Works for UV Sterilisation Chamber purposes Sludge Thickening required / Storage Tank Tidal Tank inspection owner Control Building Drawn By: Checked By: Approved By: For C. Worsfold C. Scahill T.Reidy copyright Drg. No: Rev: of Map B.2. A Scale: Date: 1 : 1,000 November 2009 Consent Project: Waste Water Discharge Licence Application Drg. Title: Achill Sound Wastewater Treatment Plant Layout Mayo County Council Water Services Section M Aras An Chontae W The Mall, Castlebar, H Co. Mayo, Ireland Tel: 094 9047454 Fax: 094 9047398 M W L Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2009/17 CCMA / Mayo County Council. © Ordnance Survey Ireland, 2009. U N D Legend Achill Sound Agglomeration Boundary Achill Sound Wastewater Treatment Plant Boundary ! Primary Discharge Point Secondary ) (Emergency) Point Pumping Station C F Illannamolt use. M W L other only. any for purposes required M W H inspection owner Drawn By: For Checked By: Approved By: C. Worsfold C. Scahill T. Reidy SW1(P) Drg. No: Rev: )! copyright of Map B.3. A SW2(E) Scale: Date: 1 : 2,500 November 2009 Consent Project: M W L Waste Water Discharge Licence Application Drg. Title: Achill Sound Wastewater Treatment Plant Primary Discharge Point SW1(P) 4.7 Mayo County Council Resrvoir Water Services Section Aras An Chontae The Mall, Castlebar, Co. Mayo, Ireland Tel: 094 9047454 27.6 Fax: 094 9047398 9.0 M W L Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2009/17 CCMA / Mayo County Council. © Ordnance Survey Ireland, 2009. U N D Legend Achill Sound Agglomeration Boundary Achill Sound Wastewater Treatment Plant Boundary ! Primary Discharge Point Secondary ) (Emergency) Point Pumping Station C F Illannamolt use. M W L other only. any for purposes required M W H inspection owner Drawn By: For Checked By: Approved By: C. Worsfold C. Scahill T.Reidy SW1(P) Drg. No: Rev: )! copyright of Map B.4.1. A SW2(E) Scale: Date: 1 : 2,500 November 2009 Consent Project: M W L Waste Water Discharge Licence Application Drg. Title: Achill Sound Wastewater Treatment Plant Secondary (Emergency) Discharge Point 4.7 SW2 (E) Mayo County Council Resrvoir Water Services Section Aras An Chontae The Mall, Castlebar, Co. Mayo, Ireland Tel: 094 9047454 27.6 Fax: 094 9047398 9.0 Includes Ordnance Survey Ireland data reproduced under OSi Licence number 2009/17 CCMA / Mayo County Council. © Ordnance Survey Ireland, 2009. Legend 9 Agglomeration Boundary M W L Achill Sound Wastewater Treatment Plant Boundary ! Primary Discharge Point Secondary 11.2 ) (Emergency) Point M W L L W M Pumping Station Holy Trinity Church (Dissused) 9.8 use. 11.1 )SW4(E) Grave Yard 12.1 GS Stn M W H other Achill only. any TK Slipway Court for House 4.9 Sports Ground Achill Br. purposes Dorrary Point 10kv H W M requiredHotel v 10k Slipway SW3(E) ) H W inspection owner M 4.8 Drawn By: For Checked By: Approved By: C. Worsfold C. Scahill T. Reidy L W M Drg. No: Rev: copyrightLW M of Map B.4.2. A Scale: Date: Achill Sound 1 : 2,500 November 2009 5.5 c na Mara Consent Project: Waste Water Discharge Licence Application M HW Drg. Title: PO Achill Sound Wastewater Treatment Plant Secondary (Emergency) Discharge Point M SW3(E) W L 5.9 Hotel M Mayo County Council TK W H Water Services Section 7.6 Aras An Chontae v The Mall, Castlebar, 0k 1 Co. Mayo, Ireland Community Tel: 094 9047454 Nursing Unit Fax: 094 9047398 Includes Ordnance Survey Ireland data reproduced under M W L OSi Licence number 2009/17 CCMA / Mayo County Council. © Ordnance Survey Ireland, 2009. Legend Agglomeration Boundary 4.7 Achill Sound Wastewater Treatment Plant Boundary ! Primary Discharge Point Secondary ) (Emergency) Point 27.6 Pumping Station 9.0 M W L use.