1. WSNTG Annual Conference 8 th September 2005 WSNTG 9 th Annual Conference “Water Services Strategic Plans – Fact or Fiction”

2. WSNTG Annual Conference 8 th September 2005 National Urban Waste Water Study Ian Aikman & Terry Kennedy Project Manager & Assistant PM

3.  NUWWS commenced in late 2001  Initiative driven by national legislation & development pressure  Need to increase quality of wastewater design data National Urban Wastewater Study

4. Study Objectives  Compile asset inventory, database & GIS  Assess networks deficiencies, records upgrading & investigation needs  Assess WwTW capacity to treat / discharge wastewater in compliance with standards and legislation & outline upgrading proposals  National guidelines and criteria for performance monitoring and investment prioritisation

5. Study Scope  Wastewater network catchments >2,000 p.e.  170 No. analysed across country, outside Dublin Region  Area covering 70,000km 2  Over 2 years

6. The Project Team Joint Venture Region 1 E G Pettit Region 2 J B Barry Region 3 White Young Green Babtie Project Management Peer Review Group Steering Committee

7. Barry & Partners White Young Green Pettit & Company Regional Management Dublin Region covered by GDSDS

8. Catchment Pilot Study Sub-Studies Catchment Assessment Field Data Collection Data Inputs 170 No. Schemes Validate Catchment Data Final Reports Methodology Pilot Study Data Inputs 6 No. Schemes Pilot Study Data Collection Data Analysis Reporting Validation

9.  Driven by Steering Committee from Inception Stage  To define and refine data collection process  To provide live data for initial analysis & processing Pilot Study

10. CatchmentCountyp.e. CastletroyLimerick12,500 RathkealeLimerick2,000 Blarney/TowerCork5,400 BallincolligCork10,666 DroghedaLouth24,500 ArdeeLouth4,000  Geographical spread of catchments in 3 regions  Range in size and nature  Previous catchment history within consortium

11. Pilot Study Castletroy  Catchment characteristics  Environment & receiving waters capacity  Network review & assessment  Network asset data relationships for sub-study models Trunk sewers Receiving Waters PStn WwTW

12. Pilot Study  Populations, flows & loads  Treatment process review  Impact on receiving waters  Sludge handling & disposal Castletroy WwTW Ballincollig WwTW

13. Pilot Study Outcomes  Questionnaire formats  Database & GIS structure  WwTW survey protocols  Data sets for sub-study models  Data collection schedule for main study

14.  Sewerage network  Treatment flow & load  Treatment processes  Receiving water quality Data Collection Process 1. Questionnaires

15.  Asset surveys  Process flow assessment  Sampling / monitoring  Performance review Data Collection Process 2. WwTW Surveys Birr WwTW, Co. Offaly WwTW Layout

16.  Questionnaires reviewed  Data downloaded to database  Analysis of available data sets  Sub-study models applied  Existing and future scheme capacity  Records upgrading needs Data Analysis

17.  Stakeholder review of catchment data  Feedback & final data refinement  Validation of draft reports by L.A. staff  Data sets ‘frozen’ (2002) Validation

18. 1 The Catchments  Areas, planning targets & population projection 2 Environment  Receiving water characteristics, flows & loads 3 Sewerage System  Asset inventory & network integrity audit  Operational management  Surveys investigations  Performance & capacity 4 Waste Water Treatment  Process & inventory  Asset condition, performance & capacity  Operational management  Upgrading requirements 5 Sludge Disposal Reporting Example Birr, Co. Offaly

19. Birr Catchment Report Plans

20. YEAR 20022022 Resident population 4,4455,379 p.e. estimate Approx 5,0007,433 Sewer length 13km (+1.5km Rising Main) - Pumping stations 3- Foul sewer flooding incidents 1- Structural sewer failures 1- Available record data None- Latest WwTW upgrade 1998- Flow to WwTW 1,600 m 3 /day- Load to WwTW 350 kg/day- Receiving Water Little Brosna River- Assimilative Capacity 78 kg/day (BOD)- Loadings to watercourse 6.4 kg/day- Watercourse constraints limited assimilative capacity regarding phosphates - Sludge 91,250 kg d.s./annum219,000 kg d.s./annum Birr Catchment Report Findings

21. Database & GIS Example – Killarney, Co. Kerry  Data storage  Geographical representation  Linkage from GIS to database

22. Data & Reporting Sequence Inputs from 4 catchment questionnaires & surveys GIS Inputs NUWWS Database Output catchment reports

23. Reporting Hierarchy 170 Catchment Reports 26 County Reports 1 National Report

24. National Study Findings

25. Source: Central Statistics Office – Census 2002 Reports  Population redistribution  Majority catchments sampled → p.e. < 5,000  Overall population increase of 36% between 2002 (1.2M) to 2022 (1.6M) Populations

26. 58% 13% 19% 10% 74% 1% 17% 8% Catchment Size & Load Catchment size distributionCatchment loading distribution by size Catchment p.e. < 2,000 Catchment p.e. 2,000-10,000 Catchment p.e. 10,000-15,000 Catchment p.e. > 15,000

27. DescriptionGravity Sewers Rising Mains CSOsPStnsOther Ancillaries Quantity (available data)5,592km286km450km64091 % civils in Grade 4 or 5 6%1%7%<5%8% % M&E in Grade 4 or 5 --<1%13%7% Network Inventory & Performance No. of sewer networks sampled No. with foul flooding to properties No. with foul flooding to environs No. with structural sewer failures No. with water course pollution No. with serious infiltration 170291237196107 100%17%72%42%56%63% NUWWS Network Inventory NUWWS Network Performance Summary

28.  Lack of network data  NUWWS inventory estimated from small sample data set  Uncertainty on CSO numbers and location  Anecdotal ‘incident’ data  Frequency of incidents not commonly known ! Conclusions - Networks Bandon Network

29. Description (as of 2002) No treatment available Preliminary treatment only Primary treatment only Secondary treatment only Secondary & nutrient reduction No. catchments (170) 29398247 Pop’n equivalent (p.e.) 973,632125,55028,967956,558505,826 % p.e. 38%5%1%37%19% % civils in Grade 4 or 5 -0%57%11%9% % M&E in Grade 4 or 5 -0%50%18%6% DescriptionAdequate Under capacity Not known Current performance (2002) 70%28%2% Projected performance (2022) without upgrading works 48%49%3% NUWWS WwTW Inventory NUWWS WwTW Performance Summary WwTW Inventory & Performance

30.  Majority WwTW reported as operating satisfactorily (2002)  Flow and load monitoring limited and variable!  O&M data variable, practices changing - DBO approach & PMS  44,000 tonnes dry solid sludge per annum – sludge management plans  UWWTD Directive upgrading ongoing Conclusions - Treatment Works Rathkeale WwTW Ardee WwTW

31. WQ Parameter BODPhosphateAmmoniaOther No. receiving waters constrained 31821710 Proportion of total sampled 30%78%16%9% Type of Receiving Water No. catchments p.e.p.e. as % Sensitive fresh / estuarial waters421,037,61140% Non sensitive fresh / estuarial waters1021,290,23350% Coastal waters26272,69910% Receiving Water Assimilative Capacity Constraints Receiving Water Types Receiving Waters Assessment

32.  Assimilative capacity of 105 (of 170) receiving waters assessed  40% of discharges to sensitive waters  86% of receiving waters found to have restricted capacity  Lack of WQ data on receiving waters : limited assessments Conclusions - Receiving Waters Bandon WwTW & River Bandon

33.  Inventory database – building block for future AMPs  Need for national guidance and standards on:- Asset condition assessment and valuation Economic criteria for sewer investigation and survey planning Minimum levels of service (trigger levels) & performance measures Comparative evaluation of projects using standard cost data/indices  Records upgrading essential to future rehabilitation planning:- €17M survey work to identify future network upgrading needs Additional €9M survey work to maintain & develop sewerage networks General Conclusions

34.  Compile & maintain accurate asset records Survey / update network records & plans Locate all combined sewer overflows Update treatment plant records as necessary Develop from the NUWWS - Integrate with CiS development?  Understand the condition of the core assets Identify the ‘core area’ of the network Intermittently re-assess the condition of the core assets  Compile & maintain reliable performance data Monitor / record network performance incidents Use computer models to assess network capacity Upgrade monitoring / sampling of treatment plant effluents NUWWS Recommendations preparing industry for the next steps

35.  Water Services Bill Implementation Strategic Plans The Next Steps

36.  Objectives Water service strategic plan are to: protect human health & the environment facilitate the provision of sufficient water services support proper planning & sustainable development  Strategic Plan to include information on: monitoring arrangements asset management planning Key points from the Bill (Cl. 36)

37.  Define the rules: objectives, standards, policies  Identify & assess the current assets  Determine the asset life & value  Assess the rehabilitation requirements  Develop optimum whole life solutions  Prioritise the work & implement the programme Asset Management Planning

38. WSNTG Annual Conference 8 th September 2005 WSNTG 9 th Annual Conference “Water Services Strategic Plans – Fact or Fiction”