Drinking Water Quality Management Plan DRINKING WATER QUALITY MANAGEMENT PLAN VERSION 4 APPROVED BY THE REGULATOR 15 MAY 2020 Doc ID: MP76 Version: 4 Active date: 25 May 2020 Doc owner: Leah Sertorio Review date: 31 January 2022 Page 1 of 101 Please note: Printed copies of this document should be verified for currency against online version. Drinking Water Quality Management Plan VERSION CONTROL Version number Details Date MP76 Version 1 Approved by the Delegate of the Regulator under the 17 January 2013 Water Supply (Safety and Reliability) Act 2008 MP76 Version 1 Re-approved by the Delegate of the Regulator under the 5 September 2013 Water Supply (Safety and Reliability) Act 2008 MP76 Version 2 Approved by the Delegate of the Regulator under the 11 March 2016 Water Supply (Safety and Reliability) Act 2008 MP76 Version 3 Approved by the Delegate of the Regulator under the 18 March 2018 Water Supply (Safety and Reliability) Act 2008 Released for internal stakeholder feedback 11 December 2019 MP76 Version 3.1 Draft incorporating internals stakeholder feedback 29 January 2020 Endorsed by Manager Water Networks 3 February 2020 Endorsed by General Manager Network Management 3 February 2020 REVIEW AND APPROVAL – INTERNAL AND EXTERNAL The Urban Utilities Drinking Water Quality Management Plan (DWQMP) is reviewed every two years and is audited every four years to ensure the plan is relevant, accurate and current in terms of the operating environment and implementation; and to identify any improvements required to ensure the drinking water remains safe to drink and meets the water quality standards of the Public Health Regulation 2018. This DWQMP is submitted to Office of Water Supply Regulation, Department of Natural Resources, Mines and Energy. APPROVAL Version number Details Date MP76 Version 3.1 Paul Belz 13 February 2020 Executive Leader Operations and Service Delivery MP76 Version 4 Department of Natural Resources, Mines and Energy 15 May 2020 Doc ID: MP76 Version: 4 Active date: 25 May 2020 Doc owner: Leah Sertorio Review date: 31 January 2022 Page 2 of 101 Please note: Printed copies of this document should be verified for currency against online version. Drinking Water Quality Management Plan TABLE OF CONTENTS 1. REQUIREMENT FOR A DRINKING WATER QUALITY MANAGEMENT PLAN ............... 7 1.1 Water Supply (Safety and Reliability) Act 2008 ..................................................... 7 2. APPLICATION OF OTHER RELEVANT LEGISLATION AND REGULATION ..................... 7 2.1 South East Queensland Water (Distribution and Retail Restructuring) Act 2009 .... 7 2.2 Public Health Regulation 2018 .............................................................................. 8 2.3 Bulk Water Supply Code ....................................................................................... 8 3. URBAN UTILITIES’ DRINKING WATER QUALITY MANAGEMENT PLAN ..................... 8 4. REVIEW AND CONTINUAL IMPROVEMENT ............................................................. 9 4.1 Regular reviews of the DWQMP ........................................................................... 9 4.2 Regular audits of the DWQMP ............................................................................ 10 5. ABOUT URBAN UTILITIES ..................................................................................... 10 5.1 Service Provider details ...................................................................................... 10 5.2 Who we are ........................................................................................................ 10 5.3 What we do ....................................................................................................... 10 5.4 Our strategic framework .................................................................................... 11 5.5 Drinking Water Quality Strategy ......................................................................... 11 6. DRINKING WATER SUPPLY SCHEMES - DETAILS OF INFRASTRUCTURE .................. 12 6.1 Drinking water schemes ..................................................................................... 12 6.2 South East Queensland Water Supply System (SEQWSS) ..................................... 15 6.3 Provision of a drinking water service to other entities ........................................ 18 7. WATER SUPPLY CHARACTERISTICS ....................................................................... 18 7.1 Methodology and general observations .............................................................. 18 7.2 Water supply characteristics summary ............................................................... 19 7.3 Beaudesert drinking water scheme ..................................................................... 21 7.4 Boonah-Kalbar drinking water scheme ............................................................... 23 7.5 Canungra drinking water scheme ........................................................................ 24 7.6 Esk-Toogoolawah drinking water scheme ........................................................... 25 7.7 Jimna drinking water scheme ............................................................................. 27 7.8 Kilcoy drinking water scheme ............................................................................. 28 7.9 Kooralbyn drinking water scheme ...................................................................... 30 7.10 Linville drinking water scheme ........................................................................... 31 7.11 Lowood drinking water scheme .......................................................................... 33 7.12 Rathdowney drinking water scheme ................................................................... 34 7.13 Somerset drinking water scheme ........................................................................ 36 7.14 South East Queensland Water Supply System ..................................................... 37 8. VERIFICATION MONITORING ............................................................................... 41 8.1 VMP – Sample Points and Sampling .................................................................... 41 8.2 VMP – Sample Analysis, Data Storage and Corporate Platforms .......................... 42 8.3 Notification of Events and Non-Conformance ..................................................... 42 8.4 VMP – Continuous Assurance (Auditing) ............................................................. 42 9. OPERATIONAL MONITORING ............................................................................... 42 Doc ID: MP76 Version: 4 Active date: 25 May 2020 Doc owner: Leah Sertorio Review date: 31 January 2022 Page 3 of 101 Please note: Printed copies of this document should be verified for currency against online version. Drinking Water Quality Management Plan 9.1 Operational Monitoring ...................................................................................... 42 9.2 Disinfection Performance ................................................................................... 43 9.3 Disinfection Management .................................................................................. 44 9.3.1 Disinfection management - dosing ............................................................... 44 9.3.2 Disinfection Management – reservoirs ........................................................ 44 9.3.3 Disinfection management – microbiological performance .......................... 45 9.4 Disinfection by-products (DBPs) ......................................................................... 46 9.4.1 DBPs – Trihalomethanes (THMs) .................................................................. 46 9.4.2 DBPs – Dosing Chemical Testing ................................................................... 46 9.5 Asset Integrity .................................................................................................... 47 9.5.1 Asset Integrity – Security of Assets............................................................... 47 9.5.2 Asset Integrity – operational improvements program ................................. 47 9.6 Customer Interactions ........................................................................................ 48 10. EVALUATION OF DATA ......................................................................................... 48 10.1 SAS Laboratory and LIMS .................................................................................... 48 10.2 Treatment Plant Licence Compliance System (TPLC) ............................................ 48 10.3 Enterprise Historian Platform (eDNA) ................................................................. 48 10.4 Business Intelligence .......................................................................................... 49 10.5 Partnership Water Quality Plan .......................................................................... 49 10.6 Drinking Water Quality Management Plan Report .............................................. 49 10.7 Customer complaints.......................................................................................... 49 10.8 Long Term Evaluation of Results ......................................................................... 49 11. OPERATIONAL AND MAINTENANCE PROCEDURES ............................................... 49 12. HAZARD IDENTIFICATION AND RISK ASSESSMENT ............................................... 50 12.1 Risk assessment methodology ...........................................................................