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Inflow and Infiltration Reduction Management Plan

South District Council

February – Working Draft

Inflow and Infiltration Reduction Management Plan Working Draft February

QUALITY RECORD SHEET Document Inflow and Infiltration Reduction Management Plan - Working Draft Reference R:\Projects\1250_Combined_Scheme_Review\500 Deliverables\510 Reports\ Resource Consent Application\Inflow and Infiltration Reduction Management Plan.docx

Date February

DOCUMENT CONTROL The following organisation(s) shall receive a electronic copy of this report on release: Council

Action Name Title, Company Signed Date Environmental Engineer, AWT Water Originated by Chris Park Ltd Senior Environmental Scientist, AWT Reviewed by Sarah Sunich Water Ltd Approved by Jason Ewert Design Manager, AWT Water Ltd

REVISION HISTORY

Version Prepared by Description Date Chris Park / Sarah Management Plan for I/I Reduction for SWDC Wastewater Working Draft Sunich Infrastructure

DISCLAIMER This report has been prepared for the particular project described to us and its extent is limited to the scope of work agreed between the client and AWT Water Limited. No responsibility is accepted by AWT Water Limited or its directors, servants, agents, staff or employees for the accuracy of information provided by third parties and/or the use of any part of this report in any other context or for any other purposes. This report is for the use by South Wairarapa District Council only, and should not be used or relied upon by any other person or entity for any other project. Any indication of costs is made on the basis of AWT Water Ltd’s experience and professional qualifications and represents its best judgment but we cannot and do not guarantee that actual costs will not vary from cost indications given. This report/study is not to be construed as providing an opinion on the commercial feasibility of the project.

AWT WATER LTD - LEVEL 1, 23 UNION STREET, 1010

C:\Users\Kerry\Dropbox\Projects\125 SOUTH WAIRARAPA DISTRICT COUNCIL\2014 Applications\Inflow and Infiltration Reduction Management Plan (3).docx KMG i Inflow and Infiltration Reduction Management Plan Working Draft February

TABLE OF CONTENTS

EXECUTIVE SUMMARY ...... IV 1 INTRODUCTION ...... 1 1.1 Inflow and Infiltration Definition ...... 1 1.2 Background ...... 1 1.2.1 Featherston ...... 1 1.2.2 Martinborough ...... 1 1.2.3 Greytown ...... 1 1.3 Consent Requirements ...... 1 2 ISSUE IDENTIFICATION & QUANTIFICATION ...... 1 2.1 Preliminary Investigations ...... 1 2.1.1 Catchment Flow Monitoring ...... 1 2.1.2 Infiltration and Inflow Assessment ...... 1 2.2 Detailed Field Investigations ...... 1 2.2.1 Infiltration Source Detection ...... 1 2.2.1.1 Night Flow Isolation ...... 1 2.2.1.2 CCTV ...... 1 2.2.1.3 Lateral Testing and Inspection...... 1

Working Draft 2.2.2 Inflow Source Detection ...... 1 2.2.2.1 Property Inspections ...... 1 2.2.2.2 Public Stormwater ...... 1 3 PRIORITY WORKS / ACTIONS ...... 1 3.1 Featherston Capital Works Programme ...... 2 3.2 Martinborough Capital Works Programme ...... 2 3.3 Greytown Capital Works Programme ...... 2 4 ONGOING WORKS / ACTIONS...... 2 4.1 Prioritised Renewals Programme ...... 2 4.2 Education Programme ...... 2 4.2.1 General Public ...... 2 4.2.2 Building Inspectors ...... 2 4.3 Review of Statutory Plan and Other Relevant Guidance ...... 2 5 REPORTING ...... 2 5.1 Information Collection and Records ...... 2 5.2 Annual Reporting Procedure ...... 2 6 ROLES AND RESPONSIBILITIES ...... 2 7 MANAGEMENT PLAN REVIEW PROCEDURE ...... 2

AWT WATER LTD - LEVEL 1, 23 UNION STREET, AUCKLAND 1010

C:\Users\Kerry\Dropbox\Projects\125 SOUTH WAIRARAPA DISTRICT COUNCIL\2014 Applications\Inflow and Infiltration Reduction Management Plan (3).docx KMG ii Inflow and Infiltration Reduction Management Plan Working Draft February

APPENDICES APPENDIX 1 – SCHEDULE OF ACTIONS

LIST OF FIGURES No table of figures entries found. LIST OF TABLES No table of figures entries found.

Working Draft

AWT WATER LTD - LEVEL 1, 23 UNION STREET, AUCKLAND 1010

C:\Users\Kerry\Dropbox\Projects\125 SOUTH WAIRARAPA DISTRICT COUNCIL\2014 Applications\Inflow and Infiltration Reduction Management Plan (3).docx KMG iii Inflow and Infiltration Reduction Management Plan Working Draft February

EXECUTIVE SUMMARY

Working Draft

AWT WATER LTD - LEVEL 1, 23 UNION STREET, AUCKLAND 1010

C:\Users\Kerry\Dropbox\Projects\125 SOUTH WAIRARAPA DISTRICT COUNCIL\2014 Applications\Inflow and Infiltration Reduction Management Plan (3).docx KMG iv Inflow and Infiltration Reduction Management Plan Working Draft February

1 INTRODUCTION

1.1 Inflow and Infiltration Definition

1.2 Background

1.2.1 Featherston

1.2.2 Martinborough

1.2.3 Greytown

1.3 Consent Requirements 2 ISSUE IDENTIFICATION & QUANTIFICATION

2.1 Preliminary Investigations

2.1.1 Catchment Flow Monitoring

2.1.2 Infiltration and Inflow Assessment 2.2 Detailed Field Investigations

2.2.1 Infiltration Source Detection

2.2.1.1 Night Flow Isolation

2.2.1.2 CCTV

2.2.1.3 Lateral Testing and Inspection

2.2.2 Inflow Source Detection

2.2.2.1 Property Inspections

2.2.2.2 Public Stormwater 3 PRIORITY WORKS / ACTIONS

AWT WATER LTD - LEVEL 1, 23 UNION STREET, AUCKLAND 1010

C:\Users\Kerry\Dropbox\Projects\125 SOUTH WAIRARAPA DISTRICT COUNCIL\2014 Applications\Inflow and Infiltration Reduction Management Plan (3).docx KMG 1 Inflow and Infiltration Reduction Management Plan Working Draft February

3.1 Featherston Capital Works Programme

3.2 Martinborough Capital Works Programme

3.3 Greytown Capital Works Programme 4 ONGOING WORKS / ACTIONS

4.1 Prioritised Renewals Programme

4.2 Education Programme

4.2.1 General Public

4.2.2 Building Inspectors

4.3 Review of Statutory Plan and Other Relevant Guidance 5 REPORTING

5.1 Information Collection and Records

5.2 Annual Reporting Procedure 6 ROLES AND RESPONSIBILITIES 7 MANAGEMENT PLAN REVIEW PROCEDURE

AWT WATER LTD - LEVEL 1, 23 UNION STREET, AUCKLAND 1010

C:\Users\Kerry\Dropbox\Projects\125 SOUTH WAIRARAPA DISTRICT COUNCIL\2014 Applications\Inflow and Infiltration Reduction Management Plan (3).docx KMG 2

APPENDIX 1 SCHEDULE OF ACTIONS