WSNTG 9th Annual Conference

1
WSNTG 9th Annual Conference

• Water Services Strategic Plans
• Fact or Fiction

2
Bundled Wastewater Scheme Implementation

• William McEvoy
• Director of Services
• South Tipperary County Council

John Power Director Nicholas ODwyer Ltd.
3
Introduction

• South Tipperary Co. Co. Perspective
• Preliminary Design / Procurement
• Ensure Value for Money
• Contract Award / Construction Management
• Establish Operation and Maintenance System

4
Site Locations
5
Background

• General Overview of South Tipperary Bundled
  Scheme
• Identify needs for wastewater treatment over the
  next 20 years
• Strategic approach to wastewater treatment in the
  county
• Identify options for operation and maintenance
• Identify / manage potential risks
• Establish best long term strategy
• Ensure value for money

6
Plant Population Equivalents
7
Scheme Drivers

• UWWT Directive
• Water Framework Directive
• Three Rivers Project (Suir, Boyne, Liffey)
• EPA Enforcement Unit
• Development Needs of Towns (Provide
  Infrastructure)

8
Procurement

• Identify Scope of Project
• Identify needs
• Value for money
• PPP Applicability
• Traditional vs. Design Build vs.
  Design-Build-Operate
• Procurement Method
• Restricted Procedure vs. Open Tendering
• Prequalify applicants to ensure suitability
• Compliance with EU Procurement Directives
• Criteria for selection Financial / Technical

9
PPP Applicability
10
Existing Works Asset Assessment

• Tipperary Town WWTP

Sludge Acceptance Facilities

• Killenaule WWTP

Phosphorus Removal, Stormwater Handling, Inlet
Works Upgrade
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Design-Build-Operate Selection

• Advantages
• Guaranteed Final Effluent
• Financial Penalties for Breach of Standards
• Guaranteed Level of Service
• Residual Value of Asset
• Capital Replacement Fund
• Greater Scope for Design Innovation
• Optimal Risk Allocation
• Emergency Procedures Guaranteed Response Times

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Bundled Scheme Selection

• Requirements for a Bundled Scheme
• Critical Mass
• Client / Contractor Co-operation and
  Communication
• Advantages of Bundled Scheme
• Economy of Scale
• Reduction in Client/Contractor Interface
• Potential for Value For Money
• Consistent Level of Service
• Long Term Budget Planning
• Increased Transparency in Cost Recovery (PPP)

13
Existing Works Upgrades

• Clonmel
• Modifications to Cater for Storm Conditions

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Scope of Works

• 20 Year Bundled D.B.O. Contract for 12 Plants
  1,000 80,000 PE
• Construction of new WWTP and outfall
  at Carrick-on-Suir
• Construction of four smaller WWTPs
• Upgrading and expansion of seven existing plants
• Phased Implementation of Sludge Management Plan

15
Tender Procedure

• Preliminary Design
• Planning Requirements
• Indicative Layouts
• Flexibility
• Tender Evaluation
• Technical / financial evaluation
• Value for money
• Compliance with planning
• Compliance with minimum requirements

16
Project Organisation
17
Design Element

• Planning
• Environmental Impact Statements
• Part 8 Planning
• Indicative Layouts
• Minimum Specification
• Minimum Client Requirements

• Fethard
• Increased Capacity
• Phosphorus Removal
• Stormwater Handling
• Sludge Acceptance Treatment

Carrick-on-Suir WWTP
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Process Evaluation

• Ballyclerihan WWTP
• ? 2,000 PE Plant
• ? Existing plant demolished
• ? Conventional activated
• sludge plant constructed

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O M Issues

• Interim O M Issues
• Programme for takeover
• Setup O M and emergency procedures
• Effluent standards during takeover period
• O M Issues
• Performance Management System
• Liaison Committee
• Monitor flow and load / Out of specification
  influent
• Plant Design Capacity
• Capital Replacement Fund

20
O M Organisation
21
Staffing Levels

• Site Personnel
• Clonmel
• Operator _at_ 14 hrs/day
• Technician _at_ 12 hrs/day
• Tipperary Town, Cashel, Carrick-on-Suir
• Operator _at_ 8 hrs/day
• Technician _at_ 2 hrs/day
• Fethard, Cahir
• Operator _at_ 5-7 hrs/day
• Technician _at_ 1-2 hrs/day
• Ardfinnan, Clogheen, Ballyporeen, Ballyclerihan,
  Killenaule, Kilsheelan
• Operator _at_ 1 hrs/day
• Technician _at_ ½-1 hrs/day

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Sludge Management

• Phased Implementation of Sludge Management Plan
• Client Responsibilities
• Liquid Sludge Transport (small plants/septic
  tanks)
• Contractor Responsibilities
• Dewatered Sludge Transport
• Sludge Acceptance / Screening / Dewatering
• Fully responsible for sludge treatment disposal
  during Phase 1
• Liase with sludge drying contractor
• Joint Responsibilities
• Agree delivery schedules
• Monitor sludge quality

23
Sludge Management
Council DBO Contractor
Phase 1 Lime Stabilisation (Cashel / Clonmel) 3
Years
Phase 2 Thermal Dryer (Clonmel) (Separate
Contract)
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Project Costs

• Design-Build
• Economy of scale
• Reduced design costs with three similar size new
  plants
• Savings of 20 on estimated D/B costs
• Estimated D/B Cost 22 million Tendered Cost
  18 million
• Operation Maintenance
• Cost per PE reduced by approximately 15 for
  Clonmel
• Cost per PE reduced by approximately 10 for
  small plants
• Other Costs
• Reduced administrative costs (South Tipperary Co.
  Co.)
• Reduced consultancy / preliminary design costs

25
O M Costs / VFM Tender Assessment
South Tipp O M costs adjusted to reflect higher
level of treatment/service
26
VFM Assessment
South Tipp O M costs adjusted to reflect higher
level of treatment/service
?

• Cahir
• Pumping Station Relocation, Phosphorus Removal
  Stormwater Handling

27
O M Cost Comparison
Note Costs per PE on graph not index linked
PE 82,000
PE 122,000
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Operation and Maintenance Costs
PE 82,000
PE 122,000
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O M Monitoring

• Role of South Tipperary
• Manage Operate Contractor
• Monitor Effluent Sampling Results
• Manage Influent to Plants
• Manage Non-Domestic Sector
• Role of Operator
• Comply with Legislative Requirements
• Comply with PMS and Tender Proposal
• Liaise with STCC / General Public
• Inform STCC of any Out of Spec Influent
• Inform STCC of any Non-Compliances

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Summary Benefits

• Faster Delivery of Projects
• Guaranteed Level of Service / Penalties
• Maintain Asset Value / Capital Replacement Fund
• Long-Term Budget Planning
• Transparency in Cost Recovery

31
Summary Issues for STCC

• Pilot Scheme Learning Curve
• Lessons Learnt
• Partnership
• Monitor and Maintain Network
• Management Role for STCC
• Liaison Committee with Contractor/ STCC

32
WSNTG 9th Annual Conference

• Water Services Strategic Plans
• Fact or Fiction