CARLOW COUNTY COUNCIL Tel: 059 9170300 Fax: 059 9 14 1503 COMHAIRLE CHONTAE CHEATHARLOCHA Email: [email protected] Web
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County Buildingr,Athy Road. Carlow. CARLOW COUNTY COUNCIL Tel: 059 9170300 Fax: 059 9 14 1503 COMHAIRLE CHONTAE CHEATHARLOCHA Email: [email protected] Web: www.carlow.ie Our Ref: JCMC 13'~November 2009 Ms Ewa Babiarczyk, Inspector, Office of Climate, Licensing and Resource Use, Environmental Protection Agency, Headquarters, PO Box 3000, Johnstown Castle Estate, Countv Wexford RE: Wastewater Discharge Licence Application for the Agglomeration of Rathoe Dear Ms Babiarczyk I refer to the above and to your correspondence dated 29Ih July, 2009 seeking further information in relation to the application for a discharge licence for the Rathoe Wastewater Works. For inspection purposes only. Consent of copyright owner required for any other use. Enclosed are the responses to the issues raised, Should you have any quely regarding the above please do not hesitate to contact me on 059 9136263. Water Services Depart-F' ent PIVR~C1 ~I\E% <L,#?P 0% Plannmng 9170307 Ccnlra EngnocnngArea 9172486 Howl ng 9170368 Mvncbhaag Area Engmnesr P12iliB Wane & Ennronment Pi36230 thrmigh ik ot hlnF Tullow Engncnng Area PI36272 Roads Pi70379 Covnn Library Pi 70094 Water Ierncel Pi36264 Fire Sullon 9131141 Counn Derelopmonl Board 91 70385 MocorTaraoon 91 70312 Loan Pnrmenrr 9172489 EPA Export 26-07-2013:16:43:05 1. Section B.1 (i) Provide details on any other sewage works discharging to the Rathoe WWTP. The new WWTP at Rathoe will be located on the site of the older, now decommissioned WWTP. The older primary discharge at location E 281,038, N 171,503 will be decommissioned by the first quarter 2010 and the new Primary Discharge Point will be at location E 281067 and N 171536 into the River Burrin, downstream of Rathoe Bridge. Rathoe Primary Discharge Point SWl E281067 N171536 This point has changed since the original application as the new discharge pipe for the new WWTP is now installed. We attach revised Table B.3 B.3 Location ofPrimant Discharge Point Give the location of the primary discharge point, as defined in the Waste Water Discharge (Authorisation) Regulation, associated with the waste water works. Type of Discharge 200mm PVC Pipe with Non Return Valve and Outfall Wall Unique Point Code RaSWl Location Downstream of Rathoe Bridge in Rathoe, Co Carlow. Grid ref (6E,6N) Easting; 281,067, Northing ;171,536 There was no storm overflow on the older Rathoe WWTP. However the new WWTP is now almost constructed and there is a new storm overflow pipe adjacent to the Primary For inspection purposes only. Discharge Point into the ConsentRiver of Burren.copyright owner required for any other use. B.5 Location ofstorm Water Overflow Pointfs) Give the location of all storm water overflow point(s) associated with the waste water works. Type of Discharge 250mm PVC Pipe Unique Point Code RaSW2 Location Rathoe Waste Water Treatment Plant, Downstream of Rathoe Bridge E2XlOh9 N171539 (ii) Provide site plan of the Rathoe WWTP including a discharge pipe from the plant to the primary discharge point. We include Site Plan for the Rathoe WWTP. Rathoe Waste Water Works (Ref: D0240-01) Further Information 2 EPA Export 26-07-2013:16:43:05 The new works consist of the following ; Inlet Works including Screen and Grit Trap Forward Feed Pumps Sludge Holding Tank Two Sequence Batch Reactors Balance Tank Storm Tank Tertiary TreatmentISand Filters Outfall Sump Flowmeter Chamber Fenic Dosing Unit Control Building Storm Overflow Pipe Primary Discharge Pipe (iii) Population Equivalent The current loading to the WWTP is calculated at 400pe. This is calculated carrying out a property and catchment survey. Rathoe is not subject to seasonal fluctuations in loadings such as festivals or holiday homes. The new WWTP is designed to cater for a Population Equivalent of 2,000. The Rathoe Agglomeration will not achieve this level of loading until 2030. The breakdown between domestic and non domestic is 95% domestic and 5% non domestic. For inspection purposes only. Consent of copyright owner required for any other use. (iv) Start and Completion Works The construction of the new 2,000pe Waste Water Treatment Plant will be completed in Q1 2010. (v) Storm Water Overflows The Storm Overflow within the Rathoe Agglomeration is designed in accordance with guidelines laid down in the DEHLG "Procedures and Criteria in Relation to Storm Water Overflows" The forward feed pumps will pump on 3DWF for hll treatment. The Stormwater holding tank is designed to hold a futher 3DWF for 2 hours and then the effluent overflows to the receiving waters. Rathoe Waste Water Works (Ref: D0240-01) Further Information 3 EPA Export 26-07-2013:16:43:05 The water in the storm tank will have received screening and degritting prior to entering storm tank and will receive a degree of primary settlement prior to overflow. When the storm flows abates the storm water is pumped back to the forward feed pumps and then receives hll treatment. There are no pumping stations within the agglomeration. We enclose Site Layout Drawing which indicates location of Storm Water Holding Tank and Storm Overflow pipe. (vi) Monitoring Points a) River Monitoring Programme EPA The Treatment plant discharges into the River Burrin. The EPA Kilkenny Regional Laboratory carries out the chemical monitoring at 6 locations on the River Bumn in County Carlow. The downstream monitoring station is No. 0400 at Ballycrogue Bridge. Biological monitoring (Q value) is also camed out and is shown for 2006. The chemical parameters sampled are for: Temperature Orthophosphate D.O. Ammonia BOD Un-ionised ammonia * Colour Nitrite * PH Nitrate Conductivity For inspection purposes only. Chloride Consent of copyright owner required for any other use. Salinity Coliforms at some stations. We attach a copy of the EPA Report for 2008. b) Urban Wastewater Regulations Monitoring In 2008 monitoring runs were carried out at Rathoe Wastewater Treatment Works as follows: Inlet (6), outlet (6), upstream (4), downstream (4). BOD, COD, Suspended Solids, Ammonia, Nitrate, Nitrite, Orthophosphate, Total Nitrogen, Total Phosphorus. The data in relation to upstream and downstream monitoring is shown in Tables F. l (i) Rathoe Waste Water Works (Ref: D0240-01) Further Information 4 EPA Export 26-07-2013:16:43:05 c) Dangerous Substances Monitoring For the purposes of the application dangerous substances monitoring was camed out at the following locations: Outlet, upstream, downstream. Four sampling runs in the preceding 12 months prior to the application. Parameters as per Table F. 1 requirements. The data in relation to the plant outlet is shown in Attachment E.4. The data in relation to upstream and downstream monitoring is shown in Tables F. 1(i) d) Drinking Water Abstraction Monitoring. The drinking water abstraction point for the Sion Cross Water Treatment Plant is directly downstream of Ballycrogue Bridge on the River Burrin. The EPA Kilkenny Regional Laboratory cames out the chemical monitoring at 5 locations on the River Bumn in County Carlow. One of these monitoring stations is Station No. 0400 at Ballycrogue Bridge. This location was sampled 5 times in the preceding 12 months prior to the application. The parameters sampled are for: Temperature Nitrite D.O. Nitrate BOD Chloride Colow Calcium pH Magnesium Conductivity Sodium Suspended solids Potassium Alkalinity For inspection purposes only. Metals Consent of copyright owner required for any other use. Orthophosphate Total colifoms Ammonia E coli Un-ionised ammonia e) Freshwater Fish Monitoring The River Bunin is not a designated Salmonid river and therefore there are no designated locations to be monitored. f) Bathing Water Monitoring No monitoring of bathing water designated locations was camed out in the 12 months preceding the application date. There are no designated locations. Rathoe Waste Water Works (Ref: D0240-01) Further Information 5 EPA Export 26-07-2013:16:43:05 (vii) Tabular Data Pt Code Pt Type Mon Type Easting Northing Verified RaSWl Primary S 281067 171536 Y Upstream Primary S 280,766 171,342 Y Downstream Primary S 281,074 171,634 Y (viii) Sampling Data The outlet quality requirement at Rathoe WWTW as set out in the urban wastewater treatment regulations is as follows: BOD = 25 mg/l with 79%-90% reduction COD = 125 mg/l with 75% reduction SS = 35 mdl with 90% reduction Monitoring for BOD, COD and SS for the 12 months preceding the application shows the following: BOD: 0 results within the limit (6) COD: 0 results within the limit (6) SS: 1 result within the limit (6) Oualitv Control Procedures The EPA Kilkenny Regional laboratory cames out sampling and testing of river waters, freshwater fish programme and the drinking water abstraction programme. Sampling required by the Urban Wastewater Regulations is camed out by Carlow County For inspection purposes only. Council and analysis is carriedConsent outof copyright by T.E. owner Laboratoriesrequired for any other Ltd., use. NAB number 106T. Sampling required by Dangerous Substances sections in the application is camed out by Carlow County Council and analysis is carried out by Environmental Laboratory Services, NAB number 11 IT. We attach the Appropriate Assessment for the Rathoe Agglomeration. Rathoe Waste Water Works (Ref: D0.240-01) Further Information 6 EPA Export 26-07-2013:16:43:05 -,...,..........a. rrareclon Agency, Keeiolkai Ukrer LaboratalY, Kiikenny - River Watet..Quaiity hloniloring Data r3ver lPRBg Code 141305 Tribulog, of: Borrow tion No. 0020 aurren Rr (3km S of Myshall) -.Ah. 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