Drinking Water Quality Management Plan 2013

Drinking Water Quality Management Plan

Drinking Water Quality Management Plan 2015

Service Provider No SP 485

Drinking Water Quality Management Plan

Table of Contents

1 Application form ...... 1 2 Summary of Drinking Water Schemes ...... 2 2.1.1 Table: List of Drinking Water Schemes ...... 2 2.1.2 Table: Current and Projected Demand for Drinking Water Schemes ...... 2 3 Key Stakeholders ...... 3 3.1.1 Table: Key Stakeholders ...... 3 3.1.2 Critical Customer Health Groups ...... 4 3.1.3 Consultation Process ...... 4 4 Amamoor Water Scheme ...... 5 4.1 Table: Scheme Summary ...... 6 4.2 Schematic: Amamoor Water Treatment Plant ...... 7 4.3 Diagram: Distribution and Reticulation Amamoor ...... 8 4.4 Table: Infrastructure Details ...... 9 4.5 Process Variations ...... 10 4.5.1 Plant Bypass ...... 10 4.5.2 Process Step Bypass ...... 10 4.6 Raw Water Quality Data Summary ...... 10 4.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 10 4.7 Raw Water Quality Data Interpretation ...... 10 4.7.1 Chart: Amamoor Raw Water Quality (Turbidity, pH and Colour) ...... 11 4.7.2 Chart: Amamoor Raw Water Quality (Manganese and Iron) ...... 12 4.8 Treated Water Quality Data Summary ...... 12 4.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 12 4.9 Treated Water Quality Data Interpretation ...... 13 4.9.1 Chart: Amamoor Treated Water Quality (Turbidity, pH and Colour) ...... 13 4.9.2 Chart: Amamoor Treated Water Quality (Aluminium, Iron, Manganese) ...... 14 4.9.3 Chart: Amamoor Treated Water Quality (Chlorine Residuals)...... 14 4.10 Reticulated Water Quality Data Summary ...... 15 4.10.1 Table: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 15 4.11 Reticulated Water Quality Data Interpretation ...... 16 4.11.1 Chart: Amamoor Reticulated Water Quality (Chlorine Residuals) ...... 16 5 Goomeri Water Scheme ...... 17 5.1 Table: Scheme Summary ...... 18 5.2 Schematic: Goomeri Water Treatment Plant ...... 19 5.3 Diagram: Distribution and Reticulation Goomeri ...... 20 5.4 Table: Infrastructure Details ...... 21 5.5 Process Variations ...... 23 5.5.1 Plant Bypass ...... 23 5.5.2 Process Step Bypass ...... 23 5.6 Raw Water Quality Data Summary ...... 23 5.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 23 5.7 Raw Water Quality Data Interpretation ...... 23 5.7.1 Chart: Goomeri Raw Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness) ...... 24 5.7.2 Chart: Goomeri Raw Water Quality (Manganese and Iron) ...... 25 5.8 Treated Water Quality Data Summary ...... 25 5.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 25 5.9 Treated Water Quality Data Interpretation ...... 26 5.9.1 Chart: Goomeri Treated Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness) ...... 26 5.9.2 Chart: Goomeri Treated Water Quality (Iron, Manganese) ...... 27 5.10 Reticulated Water Quality Data Summary ...... 27

EWSQ040 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

5.10.1 Table: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 27 5.11 Reticulated Water Quality Data Interpretation ...... 28 5.11.1 Chart: Goomeri Reticulated Water Quality (Chlorine Residuals) ...... 29 6 Gympie Water Scheme ...... 29 6.1 Table: Scheme Summary ...... 31 6.2 Schematic: Gympie Water Treatment Plant ...... 32 6.3 Diagram: Distribution and Reticulation Gympie ...... 33 6.4 Table: Infrastructure Details ...... 34 6.5 Process Variations ...... 36 6.5.1 Plant Bypass ...... 36 6.5.2 Process Step Bypass ...... 36 6.6 Raw Water Quality Data Summary ...... 36 6.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 37 6.7 Raw Water Quality Data Interpretation ...... 37 6.7.1 Chart: Gympie Raw Water Quality (Turbidity and pH) ...... 38 6.7.2 Chart: Gympie Raw Water Quality (Alkalinity, Hardness and Colour) ...... 38 6.7.3 Chart: Gympie Raw Water Quality (Aluminium, Manganese, Iron and Fluoride) ...... 39 6.8 Treated Water Quality Data Summary ...... 39 6.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 39 6.9 Treated Water Quality Data Interpretation ...... 40 6.9.1 Chart: Gympie Treated Water Quality (Turbidity, pH, Colour and Fluoride) ...... 41 6.9.2 Chart: Gympie Treated Water Quality (Aluminium, Iron, Manganese) ...... 41 6.9.3 Chart: Gympie Treated Water Quality (Chlorine Residuals) ...... 42 6.10 Reticulated Water Quality Data Summary ...... 42 6.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 42 6.11 Reticulated Water Quality Data Interpretation ...... 43 6.11.1 Chart: Gympie Reticulated Water Quality (Chlorine Residuals) ...... 44 7 Imbil Water Scheme ...... 44 7.1 Table: Scheme Summary ...... 45 7.2 Schematic: Imbil Water Treatment Plant ...... 46 7.3 Diagram: Distribution and Reticulation Imbil...... 47 7.4 Table: Infrastructure Details ...... 48 7.5 Process Variations ...... 49 7.5.1 Plant Bypass ...... 49 7.5.2 Process Step Bypass ...... 49 7.6 Raw Water Quality Data Summary ...... 49 7.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 50 7.7 Raw Water Quality Data Interpretation ...... 50 7.7.1 Chart: Imbil Raw Water Quality (Turbidity, pH and Colour) ...... 51 7.7.2 Chart: Imbil Raw Water Quality (Manganese and Iron) ...... 51 7.8 Treated Water Quality Data Summary ...... 51 7.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 52 7.9 Treated Water Quality Data Interpretation ...... 52 7.9.1 Chart: Imbil Treated Water Quality (Turbidity, pH and Colour) ...... 53 7.9.2 Chart: Imbil Treated Water Quality (Aluminium, Iron, Manganese) ...... 53 7.9.3 Chart: Imbil Treated Water Quality (Chlorine Residuals) ...... 54 7.10 Reticulated Water Quality Data Summary ...... 54 7.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 54 7.11 Reticulated Water Quality Data Interpretation ...... 55 7.11.1 Chart: Imbil Reticulated Water Quality (Chlorine Residuals) ...... 56 8 Kandanga Water Scheme ...... 56 8.1 Table: Scheme Summary ...... 57 8.2 Schematic: Kandanga Water Treatment Plant ...... 58 EWSQ040 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

8.3 Diagram: Distribution and Reticulation Kandanga ...... 59 8.4 Table: Infrastructure Details ...... 60 8.5 Process Variations ...... 61 8.5.1 Plant Bypass ...... 61 8.5.2 Process Step Bypass ...... 61 8.6 Raw Water Quality Data Summary ...... 61 8.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 61 8.7 Raw Water Quality Data Interpretation ...... 62 8.7.1 Chart: Kandanga Raw Water Quality (Turbidity, pH and Colour) ...... 62 8.7.2 Chart: Kandanga Raw Water Quality (Manganese and Iron) ...... 63 8.8 Treated Water Quality Data Summary ...... 63 8.8.1 Table: Treated Water Quality ...... 63 8.9 Treated Water Quality Data Interpretation ...... 64 8.9.1 Chart: Kandanga Treated Water Quality (Turbidity, pH and Colour) ...... 64 8.9.2 Chart: Kandanga Treated Water Quality (Aluminium, Iron, Manganese) ...... 65 8.9.3 Chart: Kandanga Treated Water Quality (Chlorine Residuals) ...... 65 8.10 Reticulated Water Quality Data Summary ...... 66 8.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 66 8.11 Reticulated Water Quality Data Interpretation ...... 66 8.11.1 Chart: Kandanga Reticulated Water Quality (Chlorine Residuals) ...... 67 9 Kilkivan Water Scheme ...... 68 9.1 Table: Scheme Summary ...... 68 9.2 Schematic: Kilkivan Water Treatment Plant ...... 69 9.3 Diagram: Distribution and Reticulation Kilkivan ...... 70 9.4 Table: Infrastructure Details ...... 71 9.5 Process Variations ...... 72 9.5.1 Plant Bypass ...... 72 9.5.2 Process Step Bypass ...... 73 9.6 Raw Water Quality Data Summary ...... 73 9.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 73 9.7 Raw Water Quality Data Interpretation ...... 73 9.7.1 Chart: Kilkivan Raw Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness) ...... 74 9.7.2 Chart: Kilkivan Raw Water Quality (Manganese and Iron) ...... 74 9.8 Treated Water Quality Data Summary ...... 74 9.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 75 9.9 Treated Water Quality Data Interpretation ...... 75 9.9.1 Chart: Kilkivan Treated Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness) ...... 76 9.9.2 Chart: Kilkivan Treated Water Quality (Iron, Manganese) ...... 76 9.10 Reticulated Water Quality Data Summary ...... 76 9.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 77 9.11 Reticulated Water Quality Data Interpretation ...... 77 9.11.1 Chart: Kilkivan Reticulated Water Quality (Chlorine Residuals) ...... 78 10 Rainbow Beach Water Scheme ...... 78 10.1 Table: Scheme Summary ...... 79 10.2 Schematic: Rainbow Beach Water Treatment Plant ...... 80 10.3 Diagram: Distribution and Reticulation Rainbow Beach ...... 81 10.4 Table: Infrastructure Details ...... 82 10.5 Process Variations ...... 83 10.5.1 Plant Bypass ...... 83 10.5.2 Process Step Bypass ...... 83 10.6 Raw Water Quality Data Summary ...... 83 10.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 84 10.7 Raw Water Quality Data Interpretation ...... 84 EWSQ040 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

10.7.1 Chart: Rainbow Beach Raw Water Quality (Turbidity, pH, Colour, and Alkalinity) ...... 84 10.7.2 Chart: Rainbow Beach Raw Water Quality (Aluminium, Manganese and Iron) ...... 85 10.8 Treated Water Quality Data Summary ...... 85 10.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 85 10.9 Treated Water Quality Data Interpretation ...... 85 10.9.1 Chart: Rainbow Beach Treated Water Quality (Turbidity, pH, Colour and Alkalinity) ...... 86 10.9.2 Chart: Rainbow Beach Treated Water Quality (Aluminium, Iron and Manganese) ...... 87 10.9.3 Chart: Rainbow Beach Treated Water Quality (Chlorine Residuals) ...... 87 10.10 Reticulated Water Quality Data Summary ...... 87 10.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 88 10.11 Reticulated Water Quality Data Interpretation ...... 88 10.11.1 Chart: Rainbow Beach Reticulated Water Quality (Chlorine Residuals) ...... 89 11 Tin Can Bay / Cooloola Cove Water Scheme ...... 89 11.1 Table: Scheme Summary ...... 90 11.2 Schematic: Cooloola Cove Water Treatment Plant ...... 91 11.3 Diagram: Distribution and Reticulation Tin Can Bay / Cooloola Cove ...... 92 11.4 Table: Infrastructure Details ...... 93 11.5 Process Variations ...... 94 11.5.1 Plant Bypass ...... 94 11.5.2 Process Step Bypass ...... 94 11.6 Raw Water Quality Data Summary ...... 94 11.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 ...... 95 11.7 Raw Water Quality Data Interpretation ...... 95 11.7.1 Chart: Cooloola Cove Raw Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness) ...... 96 11.7.2 Chart: Cooloola Cove Raw Water Quality (Aluminium, Manganese and Iron) ...... 96 11.8 Treated Water Quality Data Summary ...... 96 11.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 ...... 97 11.9 Treated Water Quality Data Interpretation ...... 97 11.9.1 Chart: Cooloola Cove Treated Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness) ...... 98 11.9.2 Chart: Cooloola Cove Treated Water Quality (Aluminium, Iron and Manganese) ...... 98 11.9.3 Chart: Cooloola Cove Treated Water Quality (Chlorine Residuals) ...... 99 11.10 Reticulated Water Quality Data Summary ...... 99 11.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 ...... 99 11.11 Reticulated Water Quality Data Interpretation ...... 100 11.11.1 Chart: Cooloola Cove / Tin Can Bay Reticulated Water Quality (Chlorine Residuals) ...... 101 12 Water Quality Complaints ...... 101 12.1 Table: Water Quality Complaints for all Schemes ...... 101 12.2 Table: Summary of Water Quality Complaints for all Schemes 1/1/10 – 31/3/12 ...... 102 13 Catchment Characteristics ...... 104 13.1 Mary River Catchment ...... 104 13.1.1 Map 1: Locality ...... 105 13.1.2 Map 6: Land Use ...... 106 13.1.3 Map 7: Disturbance ...... 107 13.1.4 Map 8: Annual Rainfall ...... 108 13.1.5 Map 9: Streams and Dams ...... 109 13.1.6 Map 13: Elevation ...... 110 13.1.7 Map 15: Mineral and Mining ...... 111 13.1.8 Map 16: Soil Landscapes ...... 112 13.1.9 Figure: Historical Gympie Flood Peaks (www.bom.gov.au) ...... 113 13.2 Cooloola Sand-mass Sub-artesian Area ...... 113 13.2.1 Diagram: Schedule 2, Cooloola Sand-mass Sub-artesian area, Water Resource (Mary Basin) Plan 2006 ...... 115 13.2.2 Diagram: Figure 1, TOPOGRAPHY, Draft Cooloola – Teewah Sand-mass Report ...... 116 13.2.3 Diagram: Location of Production and Monitoring Bores for Rainbow Beach...... 117 EWSQ040 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

14 Hazard Identification and Assessment of Risks ...... 118 14.1 Key Stakeholders ...... 118 14.1.1 Table 4.1 Stakeholders - Risk Assessment ...... 118 14.2 Assessment of Risks ...... 119 14.2.1 Methodology ...... 119 14.2.2 Table: Defined Acceptable Risk Levels ...... 119 14.2.3 Table: Likelihood Definitions for determining Risk Levels ...... 119 14.2.4 Table: Consequence Definitions for determining Risk Levels ...... 120 14.2.5 Table: Likelihood vs. Consequence Table used for determining Risk Levels ...... 120 14.2.6 Table: Level of Uncertainty Definition ...... 121 14.2.7 Table: Hazard Identification and Maximum Risk Assessment for Whole of Council ...... 122 14.3 Risk Management Measures ...... 126 14.3.1 Table: Existing and Proposed Preventative Measures for Whole of Council ...... 126 14.3.2 Table: Existing and Proposed Preventative Measures Shared by Whole of Council ...... 131 14.3.3 Table: Existing and Proposed Preventative Measures for Amamoor ...... 134 14.3.4 Table: Existing and Proposed Preventative Measures for Goomeri ...... 136 14.3.4 Table: Existing and Proposed Preventative Measures for Gympie ...... 139 14.3.5 Table: Existing and Proposed Preventative Measures for Imbil ...... 141 14.3.6 Table: Existing and Proposed Preventative Measures for Kandanga ...... 143 14.3.6 Table: Existing and Proposed Preventative Measures for Kilkivan ...... 145 14.3.7 Table: Existing and Proposed Preventative Measures for Rainbow Beach ...... 147 14.3.7 Table: Existing and Proposed Preventative Measures for Tin Can Bay Cooloola Cove ...... 148 14.4 Operation and maintenance procedures ...... 150 14.5 Quality Procedures...... 150 14.5.1 Summary of Quality Procedures ...... 150 14.6 Verification Monitoring Program ...... 151 14.6.1 Frequency of Drinking Water Sampling ...... 151 14.6.2 Monthly Drinking Water Sampling Frequency – Microbiological ...... 151 14.6.3 Schedule for rotation of drinking water sampling sites ...... 152 14.6.4 Drinking Water Sampling Sites – Microbiological ...... 152 14.6.5 Microbiological Sampling Logic ...... 153 14.6.6 Table: Amamoor Water Quality Testing ...... 154 14.6.7 Table: Goomeri Water Quality Testing...... 155 14.6.8 Table: Gympie Water Quality Testing ...... 156 14.6.9 Table: Imbil Water Quality Testing ...... 157 14.6.10 Table: Kandanga Water Quality Testing ...... 158 14.6.11 Table: Kilkivan Water Quality Testing ...... 160 14.6.12 Table: Rainbow Water Quality Testing ...... 161 14.6.13 Table: Tin Can Bay / Cooloola Cove Water Quality Testing ...... 162 14.7 Management of Incidents and Emergencies ...... 164 14.7.1 Table: Emergency Protocols ...... 164 14.7.2 Table: Incident / Emergency Levels ...... 165 14.7.3 Management of Incidents and Emergencies ...... 165 15 Risk Management Improvement Program ...... 167 15.1 Summary of all proposed preventative measures ...... 167 15.1.1 All Schemes: ...... 167 15.1.2 For Goomeri / Kilkivan: ...... 167 15.1.3 For Mary Valley (Amamoor, Kandanga and Imbil): ...... 167 15.1.4 For Gympie: ...... 168 15.1.5 For Cooloola Coast (Tin Can Bay / Cooloola Cove, Rainbow Beach): ...... 168 15.2 Risk Management Improvement Program Timetable ...... 168 15.2.1 Risk Management Improvement Program, All Schemes ...... 168 15.2.2 Risk Management Improvement Program, Goomeri/Kilkivan ...... 169 EWSQ040 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

15.2.3 Risk Management Improvement Program, Mary Valley ...... 169 15.2.4 Risk Management Improvement Program, Gympie ...... 170 15.2.5 Risk Management Improvement Program, Tin Can Bay/Cooloola Cove ...... 170 16 Water Quality Data ...... 172 16.1 Amamoor Scheme 1/1/10 – 31/3/12 ...... 172 16.2 Goomeri Scheme 1/1/10 – 31/3/12i ...... 172 16.3 Gympie Scheme 1/1/10 – 31/3/12 ...... 172 16.4 Imbil Scheme 1/1/10 – 31/3/12...... 172 16.5 Kandanga Scheme 1/1/10 – 31/3/12 ...... 172 16.6 Kilkivan Scheme 1/1/10 – 31/3/12 ...... 172 16.7 Rainbow Beach Scheme 1/1/10 – 31/3/12 ...... 172 16.8 Tin Can Bay / Cooloola Cove Scheme 1/1/10 – 31/3/12 ...... 172 16.9 SNAP Testing Results: Metals, Radiological Elements, Pesticides ...... 172 16.10 Chlorine Residuals – Reticulation 1/1/10 – 31/3/12 ...... 172 16.11 Standard Water Analysis Results (Including SNAP) ...... 172 16.12 Blue Green Algal Toxins (SNAP) ...... 172 17 Water Treatment, Maintenance and Quality Procedures...... 173 17.1 General Comments ...... 173 18 Water & Sewerage Quality Manual ...... 181 19 Quality Plan for Amamoor Water Treatment Plant ...... 183 20 Quality Plan for Jones Hill Water Treatment Plant (Gympie) ...... 185 21 Quality Plan for Imbil Water Treatment Plant ...... 187 22 Quality Plan for Kandanga Water Treatment Plant ...... 189 23 Quality Plan for Rainbow Beach Water Treatment Plant ...... 191 24 Quality Plan for Kilkivan Water Treatment Plant ...... 193 25 Quality Plan for Goomeri Water Treatment Plant ...... 195 26 Quality Plan for Cooloola Cove Water Treatment Plant ...... 197 27 Procedure for Collecting Drinking Water Samples ...... 199 28 Local Disaster Management Plan ...... 200 29 Universal Key for Diagrams ...... 202

1 Application form

Organisation: Gympie Regional Council SPID: SP 485 Contact Name: Ian Schiefelbein General Manager, Water & Sewerage Branch Phone Number: (07) 5481 0710 Fax Number: (07) 5481 0801 Mobile Number: 0407 575 569 Email: [email protected]

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2 Summary of Drinking Water Schemes The Gympie Regional Council provides water to 8 separate communities, ranging from 200 to 20,000 people. Table 2.1.1 provides a list of drinking water Schemes within Council. Table 2.1.2 is a summary of current and projected demand for drinking water for each Scheme.

2.1.1 Table: List of Drinking Water Schemes Scheme Operator Communities Name (organisation) Served Amamoor Amamoor Goomeri Goomeri Gympie Gympie and Southside Gympie Imbil Imbil Regional Kandanga Kandanga Council Kilkivan Kilkivan Rainbow Beach Rainbow Beach Tin Can Bay / Cooloola Cove Tin Can Bay & Cooloola Cove

2.1.2 Table: Current and Projected Demand for Drinking Water Schemes Current (2013) Projected in 10 years Scheme Name Population Demand Population Demand Connections Connections served ML/d served ML/d Amamoor 206 86 0.03 230 95 0.04 Goomeri 758 316 0.11 840 350 0.12 Gympie 19,430 8,096 6.00 21,500 8,950 6.63 Imbil 577 240 0.16 615 265 0.18 Kandanga 263 110 0.06 290 120 0.07 Kilkivan 596 248 0.08 660 275 0.09 Rainbow Beach 2,106 916 0.87 2,330 1,010 0.96 Tin Can Bay / 6,212 2,588 1.14 6,860 2,860 1.26 Cooloola Cove

Generally, forecast growth is fairly low (10.5% over 10 years) for Gympie and Tin Can Bay / Cooloola Cove Schemes. The infrastructure detailed later in this report demonstrates that the plants are well within capacity for the forecast period.

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3 Key Stakeholders Table 3.1.1 presents a list of the Key Stakeholders in developing this Drinking Water Quality Management Plan.

3.1.1 Table: Key Stakeholders Organisation / Participant Comments SEQWater Borumba Dam Operator. Responsible for managing water quality in the source water Council requested dialog, including catchment water quality information and management strategy for the risk assessment. Future cooperation was intimated in return for assistance with their requirements, but has not yet been forthcoming. General Manager Responsible for managing the water treatment and supply for all of Water & Sewerage Branch Council. [Ian Schiefelbein] Contributed to and reviewed DWQMP, including Risk Assessments. Attended Workshops. Process Manager Position deleted in Restructure. Water & Sewerage Branch Compiled and reviewed DWQMP, including Risk Assessments. [Cindy Walker] Attended Workshops. Manager- Treatment & Manages treatment plants, reservoirs, pumping stations and Telemetry. Compliance Contributed to, compiled and reviewed DWQMP, including Risk Water & Sewerage Branch Assessments. [Shaun Johnston] Attended Workshops. Author of current Revision. Treatment Plant Supervisor Responsible for day-to-day operations at all treatment plants and Water & Sewerage Branch monitoring programs within reticulation networks. [Ross Gibbs] Contributed to DWQMP, including Risk Assessments. Attended Workshops. Senior Inspector Responsible for reticulation asset management and technical support for Infrastructure Services drinking water within Council. (seconded to W&S Branch Contributed to and reviewed DWQMP, including Risk Assessments. [Darren Beutel] Attended Workshops. Manager Maintenance Responsible for water distribution network infrastructure. Infrastructure Services [Gus Bartlet] Foreman Responsible for maintenance and project work on water treatment facilities Infrastructure Services and reticulation. [Dave Stonier] Contributed to DWQMP, including Risk Assessments. Attended Workshops. Project Coordinator and Responsible for maintenance and project work on water treatment facilities Inspector and reticulation. Infrastructure Services Contributed to DWQMP, including Risk Assessments. [Tony Balkin] Attended Workshops. Operators-In-Charge Responsible for the operations of the treatment facilities within Council Water & Sewerage Branch: and reporting on performance of those facilities. Cooloola Coast [Dean Long] Contributed to and reviewed DWQMP, including Risk Assessments. Goomeri & Kilkivan [Colin Attended Workshops. Ford & William Bryer] Gympie [Keith Oliver and Wayne Richardson] Mary Valley [Greg Waugh] Maintenance Fitter Responsible for maintenance of active treatment assets. Water & Sewerage Branch Contributed to DWQMP, including Risk Assessments. [Brad Hawkesford] Attended Workshops.

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Organisation / Participant Comments Treatment Operators Operations the treatment facilities within Council. Water & Sewerage Branch Contributed to and reviewed DWQMP, including Risk Assessments Cooloola Coast [Justin Attended Workshops. Chandler, Rob Hood, Jason O’Brien] Gympie [Ivan Ward, Bruce Sorensen] Community and Residents Council provided a community consultation program (2011), providing the opportunity for members of the community to raise any concerns. Water quality complaints from the community are recorded and reviewed. Environmental Health Sampling of drinking water and monitoring reticulated potable water Officers quality. Health & Environmental Engaged in annual reviews of testing programmes and methodology. Services Branch Engaged in review of systems to provide prompt notice of drinking water Gympie Regional Council quality failures.

3.1.2 Critical Customer Health Groups Health Problem Risk Solution Further Action Required Haemodialysis Patients Require access to Council has a policy of N/A potable water for most notifying all customers of a 24-hour period. 24 hours before loss of supply for planned shutdowns and keeps records of names and addresses of customers receiving renal treatment at home. Council regularly notified by Renal Health Therapies of contact details of patients in Council’s service area.

3.1.3 Consultation Process Initial work on this document included management staff attending regulator sponsored information conferences and then technical days, also provided by the regulator. This provided a platform upon which a working understanding of the regulatory requirements for the document could be gained.

Staff then gathered all relevant information about council’s eight potable water treatment and supply systems and produced data tables and diagrams to store this information in a way it could be easily worked with. Relevant operators were then asked to go over all data to critic it for accuracy and relevance for each system. A series of these review cycles resulted in complete and accurate data sets for each plant and system.

As the manager of all surface water sources and conduits used within the Gympie Regional Council operational area, SEQWater appeared to be a major stakeholder in the quality of drinking water quality supplied by Council. However, they did not respond to requests by Council’s staff to take part in workshops or supply data and relevant information requested.

Council has an open-door policy, allowing residents of, and visitors to, the region to make comments regarding any aspect of Council’s management, planning and operations. All such correspondence is recorded, considered and responded to as appropriate and as required under the Water Supply (Safety and Reliability) Act 2008 and the Local Government Act 2009. Council’s Customer Service Standard invites such comment and an Annual Report is prepared, EWSQ040 Page 4 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan based partly on the analysis of data made up of these interactions with customers. The Customer Service Standard is supplied to ratepayers along with their rates notices whenever it is varied in any way and the Annual Report is freely available to all ratepayers and regulatory authorities.

3.1.3.1 Workshop Process A four-stage workshop process was employed as a basis for compiling this document: 1. Management supplied all potential workshop attendees with electronic access to the regulations and supporting documentation provided by the regulator. The purpose of this was to allow participants to inform themselves of the reasoning behind the regulation and the value of the process in assessing and improving Council’s performance in relation to provision of potable water that meets both legislative requirements and customer expectations. 2. The first round workshop consisted of management reiterating the key points of the process followed by a structured brainstorming process. Each water treatment and supply system was analysed, based on the data collected earlier, operator experience and assessment criteria set out in tables provided by the regulator. All operators were able to comment on all systems, providing a variety of views arising from different experience, training and different outlooks. 3. Feedback from the first round workshop was analysed. More data was sought and research carried out to better understand what implications may have resulted in different situations that were raised in the workshop. Data and assessments were populated into the document and a first round of proofing carried out. 4. All operators were given the opportunity to study and comment on the Drinking Water Quality Management Plan and resultant feedback was assessed and used to finalise the document.

4 Amamoor Water Scheme The Amamoor Water Treatment Plant Quality Plan (WSQ571) provides a complete process overview description.

Treatment: As the raw water enters the plant it is dosed with a coagulant (poly-aluminium chloride), then chlorine, before passing through a pressurised sand filter. The filtered water is then dosed with chlorine again, before entering a contact tank, then through the distribution system up to the reservoir. The plant is currently being prepared for an upgrade to the treatment infrastructure. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network. This is complicated by the fact that the water is delivered to the reservoir via the network, however a chlorine contact tank and long delivery main to the system provides ample contact time and provides enough reaction time to ensure the level at the first service off-take is below maximum levels for human consumption.

Reticulation: Pumping is carried out each day, with the system operating off the reservoir in the intervening periods. Water is delivered to the reservoir via the network rather than by dedicated pumping mains. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

Presented in this Chapter is a summary of the scheme, a schematic of the Water Treatment Plant, a diagram of the distribution and reticulation network, details of the scheme infrastructure and any process variations. Finally, details of the data available for raw, treated and reticulated water quality are presented.

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4.1 Table: Scheme Summary Scheme Name Amamoor Water Supply Scheme Source Amamoor Creek Allocation 31.78 ML/annum Process Contact filtration and disinfection Treatment Plant Capacity 400 kL/day Pump Stations 1 Length of Mains (Km) 2.9 Number 1 Reservoirs Capacity (kL) 90 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 234 (est.) 206 Connections[*3] 90 (est.) 86 Annual Water Consumption (ML) 17 12 Estimated Unaccounted Water (kL) [*1] 4 4.8 Consumption : Allocation 0.53:1 0.37:1 MDMM : Plant Capacity 0.17:1 0.09:1 No of Years Growth at 1% Before Allocation Exceeded 87 169 MAXIMUM DAILY USAGE (kL/day) 88 49 MDMM (MEAN DAILY MAXIMUM MONTH) (kL/day) 67 36 Average Daily Usage (kL/day) 46 32 Average Water Consumption (L/EP/day) 199[*2] 157 Rainfall(mm) 704.7 1,117 Power Used/kWh 7,010 Chemical Usage 2009/2010 2010/2011 Chemical Use per ML Treated (L/ML) Chlorine 58.7 83.1 Polymer 1.26 3.2 PACL 8.36 2.0 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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4.2 Schematic: Amamoor Water Treatment Plant

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4.3 Diagram: Distribution and Reticulation Amamoor

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4.4 Table: Infrastructure Details Component Scheme Sources Name Amamoor Creek Type Creek Intake % of supply 100 Reliability Unreliable in droughts Water quality issues Dirty in wet weather Sourcing Type (pumped/gravity/equipped bore/etc) Pumped from intake well Infrastructure Screened river intake to pump well with Description 3.5l/s submersible pumps Name Amamoor Water Treatment Plant Pre-chlorination, poly dosing and sand Treatment Plant Process filtration Design Capacity (20 hr operation) 0.4ML/d Daily flow range 0.1-.0.4ML/d Chemicals added Chlorine, polymer, PACL No. Spares and technical staff available to replace faulty equipment within Standby chemical dosing facilities (Y/N) system reserve capacity buffer.

Water sourced from and % 100% exclusive to above % of average day demand provided 100

% of scheme supply distribution area supplied 100 Yes- filter can be bypassed for back- Bypasses / Variations washing Are there any sources that do not undergo disinfection prior to No supply? Location WTP Raw Water Pipeline Type Sodium Hypochlorite Disinfection Dose rate 10-15 mg/L Target residual levels 4 mg/L Duty/standby N Dosing arrangements fixed Alarms N Auto shut-off arrangements N Pipe material Asbestos Cement Age range Average 50+ Years Distribution and Approx. % of total length 100% of 2.9 km Reticulation Areas where potential long detention periods System N/A could be expected Areas where low water pressure (eg < 12 m) could be expected during peak or other N/A demand periods)

Ground Name Amamoor Reservoir

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Component Scheme Reservoirs Capacity (ML) 0.1 Roofed (Y/N) Y

Vermin-proof (Y/N) Y

Runoff directed off roof (Y/N) Water quality Upstream location N/A responsibility GRC changes Downstream location

4.5 Process Variations

4.5.1 Plant Bypass There is no entire plant bypass for Amamoor Water Treatment Plant.

4.5.2 Process Step Bypass The filter can by bypassed, as shown in the previous Schematic. The backwash process requires this bypass to be open to provide backwash water to the filter. Procedures specify that the inlet valve to the contact tank be closed when this is in process. The backwash procedure also requires the dosing of Sodium Hypochlorite to begin before the backwash is complete, ensuring disinfection of the contents of the filter prior to being brought back online.

A review of the procedure is required to ensure it is up to date and in the format preferred by Council. Further investigation is also required to the physical barriers, alarms and interlocks required to ensure the raw water does not enter the reticulation system without adequate filtering and disinfection.

4.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with council’s Records Department. Forms for the recording of variables are controlled as part of council’s document quality management system.

4.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Variable Raw pH Turbidity Raw Colour Raw Iron Manganese Units [NTU] [HU] [mg/L] [mg/L] No. of Samples 109 109 109 49 54 Maximum 8.20 100 800 0.320 0.165 Minimum 7.22 0.9 10 0.030 0.026 Average 7.76 9.7 102 0.114 0.080 Appendix 1 contains Amamoor Water Scheme Data from 1st January 2010 to 31st March 2012.

4.7 Raw Water Quality Data Interpretation Data is available for the Amamoor Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Amamoor Water Treatment Plant is generally consistent, with operational parameters recorded weekly or fortnightly.

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Raw Water Quality Trends (refer to the following Charts): • Turbidity is mildly seasonal. Generally steady and medium values (<20 NTU) from May to October, with small spikes during the rest of the year which are related to rainfall. These spikes rarely top 50 NTU. This same behaviour is seen with colour with winter month values usually <200 HU, spikes occasionally above 400 HU. • pH is variable but within a range of 7.2 – 8.2., averaging 7.76. • Manganese in the raw water is generally low (usually <0.1mg/L) and steady. There are small increases generally during the high rainfall summer months but rarely above 0.1 mg/L. • Iron shows generally low levels of <0.15 mg/L, with occasional peaks of over to 0.2 mg/L during the wetter summer months.

Generally, the raw water to the plant has consistently lower turbidity and colour during the dry months of May to October. During the rainfall events in the catchment of Amamoor Creek during the summer months, all parameters experience variability.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

4.7.1 Chart: Amamoor Raw Water Quality (Turbidity, pH and Colour)

Raw Turbidity Raw Colour Raw pH

1000 9

800 8.5

600 8 pH

400 7.5 Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity

200 7

0 6.5 1/01/2010 1/02/2010 1/03/2010 1/04/2010 1/05/2010 1/06/2010 1/07/2010 1/08/2010 1/09/2010 1/10/2010 1/11/2010 1/12/2010 1/01/2011 1/02/2011 1/03/2011 1/04/2011 1/05/2011 1/06/2011 1/07/2011 1/08/2011 1/09/2011 1/10/2011 1/11/2011 1/12/2011 1/01/2012 1/02/2012 1/03/2012

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4.7.2 Chart: Amamoor Raw Water Quality (Manganese and Iron)

Raw Iron Raw Manganese

0.8

0.6 [mg/L]

0.4

0.2

0 1/01/2010 1/02/2010 1/03/2010 1/04/2010 1/05/2010 1/06/2010 1/07/2010 1/08/2010 1/09/2010 1/10/2010 1/11/2010 1/12/2010 1/01/2011 1/02/2011 1/03/2011 1/04/2011 1/05/2011 1/06/2011 1/07/2011 1/08/2011 1/09/2011 1/10/2011 1/11/2011 1/12/2011 1/01/2012 1/02/2012 1/03/2012

4.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

Plant diaries are also kept to record change of set points, weather conditions, operating conditions, plant attendance and other details related to the operation of the Water Treatment Plant. Old diaries are stored at the Treatment Plant.

4.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Chlorine Variable pH Turbidity Colour Aluminium Iron Manganese Residual [Unit] NTU HU mg/L mg/L mg/L mg/L No. of Samples 109 109 109 50 53 53 204 Maximum 8.20 1.30 10 0.058 0.049 0.019 4.80 Minimum 7.30 0 1 0.004 0.000 0.002 2.40 Average 7.76 0.33 2.2 0.020 0.015 0.011 3.49 ADWG Value 6.5 - 8.5 5 15 0.2 0.3 0.1 5 No. of Excedences 0 0 0 0 0 0 0 Appendix 1 contains Amamoor Water Scheme Data from 1st January 2010 to 31st March 2012.

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4.9 Treated Water Quality Data Interpretation Data is available for the Amamoor Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Amamoor Water Treatment Plant is generally consistent, with operational parameters recorded weekly or fortnightly.

Treated Water Quality Trends (refer to the following Charts): • Turbidity is generally very low (average 0.33 NTU) and well controlled. • Colour is steady and easily controlled during the dry winter months (May to October), with occasional peaks of 5 NTU and rare spikes of 10 NTU during the wet summer months. • pH is not controlled as part of the process, but remains well within ADWG guidelines. • Aluminium, Iron and Manganese in the treated water are generally low and well controlled (all less than 0.1 mg/L). • Chlorine residuals are all within ADWG guidelines and generally high (average 3.49 mg/L). This is highly variable and is controlled to chlorine residuals measured in the reticulation system. It needs to be relatively high because pumping is via the network, not direct to the reservoir, allowing limited contact time for close areas of the network. Some sections of the network are also prone to extended retention times, requiring high levels of initial dosing to maintain residuals. Dosing has to be at the start of the treatment process, to help oxidise and remove iron and manganese through the filters and therefore carry through of a residual is more unpredictable, again leading to higher initial levels being specified. Target ranges are set over a wide spread to accommodate variable water conditions, which largely affect the process efficiency of the plant. • Data presented reflects that held on the Gympie Water & Sewer Database for the period considered and does not include all data collected for the period, leading to gaps being evident in the graphs. The remaining data is not in digital form, but is on paper, which is stored at the plants.

The Amamoor Water Treatment Plant controls the above parameters well, keeping within the ADWG values.

4.9.1 Chart: Amamoor Treated Water Quality (Turbidity, pH and Colour)

Treated Turbidity Treated Colour Treated pH

25 8.5

20 8

7.5 pH

10 Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity 7 5

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4.9.2 Chart: Amamoor Treated Water Quality (Aluminium, Iron, Manganese)

Treated Aluminium Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

4.9.3 Chart: Amamoor Treated Water Quality (Chlorine Residuals)

3 [mg/L]

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4.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

4.10.1 Table: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 224 16 17 17 Maximum 4.40 3.50 1.00 0.00 Minimum 0.04 0.10 0.00 0.00 Average 2.19 1.51 ADWG 5 5 0 0 No. of Excedences 0 0 1 0

Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Variable Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 6 6 6 6 6 6 6 6 6 6 Maximum 0.050 0.010 0.010 85 0.6 8 0.200 0.060 0.040 13 Minimum 0.000 0.000 0.000 41 0.0 4 0.005 0.010 0.000 3 Average 0.022 0.006 0.006 56 0.4 6 0.041 0.042 0.020 10 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Turbidity pH Colour Total Total Dissolved Fluoride Bromate Chlorate Variable Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L mg/L mg/L No. of Samples 6 6 6 6 6 6 1 1 Maximum 5 8.18 3.0 154 291 0.10 0.000 0.590 Minimum 1 7.31 0.0 113 216 0.00 0.000 0.590 Average 2 7.78 1.7 124 241 0.06 0.000 0.590 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 0.02 No. of Excedences 0 0 0 0 0 0 0 n/a Appendix 1 contains Amamoor Water Scheme Data from 1st January 2010 to 31st March 2012.

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4.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored weekly in multiple locations within the reticulation system. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 16 samples tested in this period

There was one pathogen result that showed positive for Coliforms on 1/11/10. The e-Coli test was negative and the chlorine residual was 2.1 mg/L for the same sample. This indicates a possible fault with the sampling procedure.

During this period there were 3 samples sent to Queensland Health for full Standard Water Analysis. All variables are within ADWG guidelines except for 5 of the Total Hardness which was outside the aesthetic value (200 mg/L), but within the Health Guideline (500 mg/L). All of these high value samples were taken between May 2010 and March 2011 with the subsequent sample in March 2011 within aesthetic guidelines.

The data shown in Table 6.10.1is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Amamoor.

The reticulated chlorine residuals are variable, controlled only by the residuals leaving the Water Treatment Plant. There is a gap in the data from September 2010 to January 2011. The residuals are generally <3mg/L with an average of 2.19 mg/L. Due to the low flows in sections of the reticulation system, there are usually very low readings which require the dosing rates for sodium hypochlorite to remain high, as shown in the treated water data.

Disinfection by-products are present, as indicated by chlorate and a strong “chlorine” taste and odour.

4.11.1 Chart: Amamoor Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

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5 Goomeri Water Scheme Goomeri is a town in the Western region. The GPS Co-ordinates of the Water Treatment Plant are GPS -26.189216, 152.072754. The Goomeri Water Treatment Plant Quality Plan (WSQ750), provides a complete process overview description

Treatment: Water is treated by means of the following process: Flocculation & Settling Sand Filtration Ozone BAC filtration (during algal outbreaks) Chlorination Softening pH correction Chlorination

Control: Control of the plant is via PLC/Computer. The plant stops and starts from level signals in the clear water tank. Clear water pumping is controlled by level signals on the reservoirs in town. When the plant is unattended, there is an automatic dial-out for any faults, with an operator on call at all times. Presented in this Chapter is a summary of the scheme, a schematic of the Water Treatment Plant, a diagram of the distribution and reticulation network, details of the scheme infrastructure and any process variations. Finally, details of the data available for raw, treated and reticulated water quality are presented. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network.

Reticulation: System floats off reservoir, with daily pumping through the network to maintain reservoir levels and service pressures. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

Special Risks Identified: Arsenic levels were found to increase in raw water sourced from creek water after heavy rains and flooding. It is thought that past and present mining operations and abandoned cattle dips may be the source. Levels will be monitored before switching from bores over to surface water sources and an annual test taken in off- stream storages for monitoring purposes. Over recent extended drought periods, lack of stream flows has meant that bores have been the predominant component of raw water for this system.

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5.1 Table: Scheme Summary Scheme Name Goomeri Water Supply Scheme Source Bores Process BAC, Alum, Ozone Treatment Plant Capacity 120kL/day Pump Stations 1 Length of Mains (Km) 10.1 Number 2 Reservoirs Capacity 210,000 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 751 (est.) 758 Connections[*3] 313 (est.) 316 Annual Water Consumption (ML) 49 41 Estimated Unaccounted Water (kL)[*1] 13 17.5 MAXIMUM DAILY USAGE (kL/day) 258 145 MDMM (MEAN DAILY MAXIMUM MONTH) (kL/day) 169 141 Average Daily Usage (kL/day) 135 113 Average Water Consumption (L/EP/day) 179[*2] 148 Rainfall(mm) 334.8 1,978 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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5.2 Schematic: Goomeri Water Treatment Plant

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5.3 Diagram: Distribution and Reticulation Goomeri

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5.4 Table: Infrastructure Details Component Scheme Source 1 Name Kimbombi Creek Screened gravity creek Intake at weir to off-stream Type storage ponds (2) % of supply 70% (typical) Reliability Unreliable in drought (4 years holding capacity) Blue-green algae and duckweed; Arsenic from dips Water quality issues or mining in catchment Sourcing Type (pumped/gravity/equipped Infrastructure bore/etc) Gravity Description Off-stream Storages: 2 earth tanks Source 2 Name School Bore Type Sub-artesian Bore field % of supply 8% (typical) Reliability High -1800mm to Water Table Water quality issues Mineral content typical to bores Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete encased Infrastructure bore/etc) bore Description bore depth:7.5m Source 3 Name Barrets Rd Bore Type Sub-artesian Bore field % of supply 10% (typical) Reliability Medium. Relies on nearby Nanga Creek Water quality issues Mineral content typical to bores Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete encased Infrastructure bore/etc) bore Description bore depth:18m Source 4 Name Sports Ground Bore Type Sub-artesian Bore field % of supply 12% (typical) Reliability Medium - relies on Nanga Creek Water quality issues Mineral content typical to bores Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete encased Infrastructure bore/etc) bore Description bore depth:18m Source 5 Name Kimbombi Creek Bore- feed to Off-stream storage Type Sub-artesian Bore field % of supply 0% (typical) Reliability Medium. Relies on nearby creek Water quality issues Mineral content typical to bores Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete encased Infrastructure bore/etc) bore Description bore depth:18m Name Goomeri Water Treatment Plant All raw sources are mixed before entry to the plant. Process Process comprises flocculation, clarification, Treatment Plant filtration, ozone. BAC required during periods of EWSQ040 Page 21 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Component Scheme blue-green algae outbreaks or roll-overs in the storage Design Capacity (20 hr operation) 0.12ML/d Daily flow range 0-0.12ML/d (8-12 L/s) Poly, Sodium Hydroxide, Ozone, Softener, Brine, Chemicals added Sodium Hypochlorite Y-Pumps. Spares for other parts and technical staff available to replace faulty equipment within system Standby chemical dosing facilities (Y/N) reserve capacity buffer. Water sourced from and % 100% exclusive to above % of average day demand provided 100 % of scheme supply distribution area supplied 100 Bypasses / Variations Dam & Bores can be run direct to reticulation Are there any sources that do not undergo disinfection prior to supply? No Location Into treated water tank Type Sodium Hypochlorite

Dose rate 3mg/L Disinfection Target residual levels in Retic. mains 0.6mg/L Duty/standby Y Dosing arrangements Flow paced and analyser Alarms low/ high residual on SCADA Auto shut-off arrangements N Pipe material Blue Brut 95%; AC 5% Age range 75%>50yrs; 25%<30yrs Distribution and Approx. % of total length of 10.1 km Reticulation Old 225 raw gravity main from off-stream storages System Areas where potential long detention periods could be expected to treatment plant (Cannot Scour) Areas where low water pressure (eg < 12 m) could be expected during peak or N/A other demand periods) Ground Goomeri Reservoir Name Mary St Capacity (ML) 0.4ML Reservoirs Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y Water quality Upstream location N/A responsibility GRC changes Downstream location

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5.5 Process Variations

5.5.1 Plant Bypass There is an entire plant bypass for Goomeri Water Treatment Plant, making it possible to send raw water directly to the reticulation system.

A review of the procedure which prevents this from occurring accidentally, as well as the condition of the infrastructure currently in place is required to ensure no accidental opening or leakage can occur.

5.5.2 Process Step Bypass The ozone and carbon filter can be bypassed if required. This step in the process is required for destroying and removing any cyanobacteria toxins, and can be taken offline when there are no blue-green algae evident at the Kimbombi Off-stream Storage. In normal practice, it is kept online to help reduce any taste and odours.

The water softener is rated for flow rates of less than 4 l/s. As demand rises, for example during fire hydrant use, the softener bypass valve will open to allow for the higher flow. This has the possibility of allowing high hardness water through to the reticulation system, possibly exceeding the aesthetic guideline values of ADWG.

5.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

The Goomeri system provides the option of using any one or a combination of sources, with the typical raw water being a blended combination of several of the bore sources and the off-stream storage water.

5.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Raw Raw Raw Raw Raw Variable pH Turbidity Colour Alkalinity Hardness Iron Manganese [Unit] NTU HU meq/L mg/L mg/L mg/L No. of Samples 27 27 27 27 27 27 27 Maximum 7.61 7.20 194 646 666 0.525 0.475 Minimum 6.71 0.60 2 204 140 0.011 0.031 Average 7.19 1.87 90 257 259 0.159 0.189 Appendix 1 contains Goomeri Water Scheme Data from 1st January 2010 to 31st March 2012.

5.7 Raw Water Quality Data Interpretation Data is available for the Goomeri Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Goomeri Water Treatment Plant is generally consistent, with operational parameters recorded fortnightly or monthly.

Raw Water Quality Trends (refer to following Charts): • Over this period, the raw water sourced for Goomeri is a variable blend of bore water and creek water via the Kimbombi Off-stream Storage. The amount of bore water used is indicated by the Hardness, with the Off- stream Storage being used less in seasonal algal and dam-turning incidents.

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• Turbidity peaks in April 2010 (probably a dam rollover, >7 NTU). Low hardness at this time confirms that the plant is running mostly on water sourced from the Kimbombi Off-stream Storage. Turbidity remains constant (<2 NTU), reducing as the proportion of bore water increases (as shown by the Hardness). • pH is shows some variability, averaging 7.19. • Colour also peaked around April 2010 (194 HU), steadily reducing as the proportion of bore water increases to remain <100 HU. • Alkalinity has trended flat since May 2010, averaging 257 meq/L overall. • Both Manganese and Iron peaked in April 2010 and have trended lower since the increased use of bore water, averaging <0.2 mg/L.

The water sourced from Kimbombi Off-stream Storage can be seasonal both due to rainfall and dam turnover.

The dam turnover event is carefully monitored for, with regular inspections by operators to ensure that the Off- stream storage is not used during these poor quality times. Blue green Algal blooms also usually occur around these times, and are carefully monitored.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

5.7.1 Chart: Goomeri Raw Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness)

Raw pH Raw Turbidity Raw Colour Raw Alkalinity Raw Hardness

8 800

7 700

6 600

5 500

4 400

pH, Turbidity [NTU] Turbidity pH, 3 300

2 200 Colour [HU], Alkalinity [meq/L], Hardness [mg/L] Hardness [meq/L], Alkalinity [HU], Colour 1 100

0 0 13/01/2010 13/02/2010 13/03/2010 13/04/2010 13/05/2010 13/06/2010 13/07/2010 13/08/2010 13/09/2010 13/10/2010 13/11/2010 13/12/2010 13/01/2011 13/02/2011 13/03/2011 13/04/2011 13/05/2011 13/06/2011 13/07/2011 13/08/2011 13/09/2011 13/10/2011 13/11/2011 13/12/2011 13/01/2012 13/02/2012 13/03/2012

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5.7.2 Chart: Goomeri Raw Water Quality (Manganese and Iron)

Raw Iron Raw Manganese

0.8

0.6 [mg/L]

0.4

0.2

0 13/01/2010 13/02/2010 13/03/2010 13/04/2010 13/05/2010 13/06/2010 13/07/2010 13/08/2010 13/09/2010 13/10/2010 13/11/2010 13/12/2010 13/01/2011 13/02/2011 13/03/2011 13/04/2011 13/05/2011 13/06/2011 13/07/2011 13/08/2011 13/09/2011 13/10/2011 13/11/2011 13/12/2011 13/01/2012 13/02/2012 13/03/2012

5.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

5.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Treated Treated Variable pH Turbidity Colour Alkalinity Hardness Aluminium Iron Manganese [Unit] NTU HU meq/L mg/L mg/L mg/L mg/L No. of Samples 27 27 27 27 21 27 27 27 Maximum 7.70 0.5 7 520 529 0.021 0.009 0.060 Minimum 7.11 0.1 0 210 59 0.008 0.004 0.008 Average 7.26 0.2 1 262 191 0.011 0.007 0.015 ADWG Value 6.5 - 8.5 5 15 n/a 500 0.2 0.3 0.1 No. of Excedences 0 0 0 n/a 1 0 0 0 Appendix 1 contains Kilkivan Water Scheme Data from 1st January 2010 to 31st March 2012.

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5.9 Treated Water Quality Data Interpretation Data is available for the Goomeri Water Treatment Plant for more than 5 years. Council has information available on our database from 1st January 2010.

The data available for the Goomeri Water Treatment Plant is generally consistent, with operational parameters recorded fortnightly or monthly.

Treated Water Quality Trends (refer to following Charts): • Turbidity is consistently very low (average 0.20 NTU) and well controlled. • Apart from a peak of 7 HU in May 2010 (correlating with the high raw water colour of the same period), Colour is consistently low, averaging 1 HU overall. • pH is well controlled as part of the process with an average of 7.26. • Hardness is controlled at the Goomeri Water Treatment Plant by the use of a water softener. As the proportion of bore water increases, the softener requires more frequent regeneration. A high hardness of 529 mg/L (ADWG aesthetic guideline value 500 mg/L) occurred in February 2011 as the proportion of bore water became very high. An increase in the regeneration frequency has helped to reduce this to almost 300 mg/L by March 2012. • Aluminium, Iron and Manganese in the treated water are consistently low (<0.15 mg/L). • Sodium Hypochlorite is dosed at the outlet of the Goomeri Water Treatment Plant, but not measured. It is controlled to reticulation Chlorine residual tests.

The Goomeri Water Treatment Plant controls the above parameters well, generally keeping within the ADWG guideline values

5.9.1 Chart: Goomeri Treated Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness)

Treated pH Treated Turbidity Treated Colour Treated Alkalinity Treated Hardness

8 800

7 700

6 600

5 500

4 400

3 300 pH, Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity pH, 2 200 [mg/L] Hardness [meq/L], Alkalinity

1 100

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5.9.2 Chart: Goomeri Treated Water Quality (Iron, Manganese)

Treated Aluminium Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

5.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

5.10.1 Table: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 160 20 22 22 Maximum 1.63 2.70 120.00 0.00 Minimum 0.09 0.10 0.00 0.00 Average 0.66 0.99 ADWG 5 5 0 0 No. of Excedences 0 0 2 0

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Turbidity pH Colour Total Total Dissolved Fluoride Bromate Chlorate Variable Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L mg/L mg/L No. of Samples 6 6 6 6 6 6 1 1 Maximum 5 8.18 3.0 154 291 0.10 0.000 0.590 Minimum 1 7.31 0.0 113 216 0.00 0.000 0.590 Average 2 7.78 1.7 124 241 0.06 0.000 0.590 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 0.02 No. of Excedences 0 0 0 0 0 0 0 n/a Appendix 1 contains Goomeri Water Scheme Data from 1st January 2010 to 31st March 2012.

5.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored fortnightly in multiple locations within the reticulation system. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 22 samples tested in this period.

There were two pathogen results that showed positive for Coliforms but not e-Coli on 1/11/2010, both in separate locations within Goomeri. The chlorine residual was 0.2 mg/L and 0.1 mg/L for the same samples and all subsequent samples were negative. This indicates a possible fault with the sampling procedure.

During this period there were 6 samples sent to Queensland Health for full Standard Water Analysis. All variables are within ADWG guidelines. The data shown in Table 8.11.1 is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Goomeri.

The reticulated chlorine residual data is available for the entire period shown, but not available within the database. However it can be seen residuals are controlled to <2 mg/L, These residuals are controlled by the Sodium Hypochlorite dosing at the Goomeri Water Treatment Plant.

Disinfection by-products are present, as indicated by chlorate and a strong “chlorine” taste and odour.

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5.11.1 Chart: Goomeri Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

6 Gympie Water Scheme Gympie is the largest town in the Council. The GPS Co-ordinates of the Water Treatment Plant are GPS -26.221675, 152.676809. The Jones Hill WTP Quality Plan (WSQ101) provides a process overview description.

Water Treatment: The raw water pumps (A3 & A4) then pump the water to the head of the plant. Here it is dosed with coagulants, mainly alum sulphate and magna-sol 589 PACI and rapidly mixed in a flash mixer before passing into the flocculation tank. A series of four horizontal paddles gently stirs the dosed water and creates the floc which entraps the soil particles. This flocculated water is then allowed to pass into the sedimentation tank, where the passive conditions allow the floc to settle to the bottom where it is moved by a scraper into a central sump, which is drained regularly to the recovery tank. The relatively clear water at the top is collected by a series of V notched troughs and channelled into the six rapid gravity sand filters. After passing through the filters, the clear water is dosed with hydrated lime for pH correction and fluoride for medication, and then flows into the clear water tank (see figure 6.2). As the water is drawn from the clear water tank by the clear water pumps, it is dosed with gaseous chlorine for disinfection. Pumps B1 and B2 pump water to the Jones Hill reservoirs and pumps C4 and C5 pump across town to the Ferguson Hill reservoirs. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network. Hypochlorite is dosed at Ferguson Hill Reservoirs to maintain a chlorine residual in the network.

Sludge Treatment: The filter backwash wastewater and the settled sludge discharged from the sedimentation tank are collected in the recovery tank. When the treatment plant is operating, water from the recovery tank is slowly released into the thickener tank. This tank works similarly to the sedimentation tank in that the sludge is concentrated or thickened in the bottom cone and the cleaner supernatant flows to a pump well and recycled back to the head of the treatment plant. The thickened sludge is then pumped to a belt filter press where it is dosed with a polyelectrolyte to aid in dewatering the sludge as it passes through the press. The dry sludge cake discharged from the press is collected in bins and then transported to the tip to be buried.

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Control: Control of the plant is via PLC/computer to take advantage of the night rate power tariff. Most pumping is done during the hours of 9pm to 7am weekdays and during the weekend. When the plant is unattended, there is an automatic dial-out for any faults, with an operator on call at all times.

Reticulation System: The plant pumps to two high-level zones each served by one reservoir, and two low-level zones, each served by two reservoirs. Pumping is via the network mains with limited dedicated sections of pumping mains. Reservoirs hold three days’ supply of water under normal usage conditions and are topped up daily by a running the plant until target levels are met, usually while the plant is manned. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

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Table: Scheme Summary Scheme Name Gympie Water Supply Scheme Source Mary River

Allocation 3455 ML/annum - High Priority Coagulation, sedimentation, filtration, pH correction and Process Treatment Plant disinfection and fluoridation Capacity 18,000 kL/day (20 hours) Pump Stations 3 Length of Mains (km) 248.2 Number 9 Reservoirs Capacity (ML) 27.88 Zone Location Capacity (ML) Ferguson Hill 1 9.1 North Side Low Zone Ferguson Hill 2 9.1 North Side High Zone Wineglass 0.27 Jones Hill 1 3.7 Reservoir Details South Side Low Zone Jones Hill 2 4.4 Lindsay Street LL 0.68 South Side High Zone Lindsay Street HL 0.14 Noosa Road 0.49 Noosa Road Zone Penny Road 0.05 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 19,116 (est.) 19,430 Connections[*3] 7,965 (est.) 8,096 Annual Water Consumption (ML) 2634 2186 Estimated Unaccounted Water (kL)[*1] 338 449 Consumption : Allocation 0.76:1 0.63:1 MDMM : Plant Capacity 0.54:1 0.35:1 No of Years Growth at 2.5% Before Allocation Exceeded 12 23 MAXIMUM DAILY USAGE (kL/day) 13,229 7,938 MDMM (MEAN DAILY MAXIMUM MONTH) (kL/day) 9,676 6,367 Average Daily Usage (kL/day) 7,216 5.990 Average Water Consumption (L/EP/day) [*2] 377 308 Rainfall(mm) 1,063.6 1,877 Total Power Used (kWh) 1,455,638 1,242,083 Total Sludge Produced (kgs) 357,415 469,595 Chemical Usage 2009/2010 2010/2011 Chemical Use / ML Treated Alum (kg) 13.93 27 Chlorine (kg) 3.63 1.0 Lime (kg) - 7.3 Polyelectrolyte (L) 17.48 0 PACL(L) 4.09 3.9 Soda(kg) 14.38 15.8 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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6.1 Schematic: Gympie Water Treatment Plant

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6.2 Diagram: Distribution and Reticulation Gympie

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6.3 Table: Infrastructure Details Component Scheme Name Borumba Dam Type River off-take from Mary River % of supply 100 Sources Reliability Reliable; delivery dependent on dam managers Silt; blue-green algae, pesticides; microbiological; Water quality issues Arsenic; animal faeces; flotsam Type (pumped/gravity/equipped Pumped from Pump well Sourcing bore/etc) Infrastructure Screened shallow off-take above temporary rock Description weir via tunnel to deep pump well Jones Hill Water Treatment Plant Name (Gympie Water Treatment Plant) Process comprises flocculation, clarification, Process filtration, chlorination and fluoridation; pH correction. Design Capacity (20 hr operation) 18ML/d @ 250L/s Daily flow range 2.3-12.1ML/d Alum, Chlorine, Fluoride, Soda Ash, Chemicals added Treatment Polyelectrolyte, PACL, PAC, PolyDadMac Plant No. Spares and technical staff available to replace Standby chemical dosing facilities faulty equipment within system reserve capacity (Y/N) buffer. Water sourced from and % Borumba Dam 100% % of average day demand provided 100% % of scheme supply distribution area 100% supplied Bypasses / Variations Yes Are there any sources that do not undergo No disinfection prior to supply? At both WTP Clearwater Pipelines & back-up at Location Ferguson Hill Reservoirs Chlorine Gas at Plant; Sodium Hypochlorite at Type Ferguson Hill Reservoir C-Pumps: 2kg/hr; B-Pumps:1.4 & 1.8 kg/hr; As Dose rate Disinfection required @ Ferguson Hill Target residual levels ex plant 3.5mg/L; 0.5-1.5mg/L reticulation Duty/standby Generator, Interchangeable pump and dosing Dosing arrangements fixed, residual analyser Alarms failure, low/ high residual Auto shut-off arrangements For Chlorine leaks Pipe material Asbestos Cement Distribution Age range Average 30 Years old and Approx. % of total length 60% of 248km Reticulation Pipe material PVC System Age range Average 10 Years old Approx. % of total length 20% of 248km EWSQ040 Page 34 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Component Scheme Pipe material Cast Iron Age range Average 30 Years old Approx. % of total length 200% of 248km Areas where potential long detention Fisher Road Demand System (Kingfisher periods could be expected Development) Areas where low water pressure (eg < 12 m) could be expected during peak N/A or other demand periods)

Ground

Name Ferguson Hill 1 Capacity (ML) 9.1 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y

Ground

Name Ferguson Hill 2 Capacity (ML) 9.1 Reservoirs Roofed (Y/N) Y

Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y

Ground

(continued on Name Jones Hill 1 next page) Capacity (ML) 3.7 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y

Ground

Name Jones Hill 2 Capacity (ML) 4.4 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y Reservoirs Elevated Name Wineglass Capacity (ML) 0.27

Roofed (Y/N) Y (continued Vermin-proof (Y/N) Y from previous page) Runoff directed off roof (Y/N) Y Ground

Name Penny Rd Capacity (ML) 0.05

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Component Scheme Roofed (Y/N) Y Vermin-proof (Y/N) Y

Runoff directed off roof (Y/N) Y

Ground

Name Lindsay St LL Capacity (ML) 0.68 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y Elevated Name Southside HL Capacity (ML) 0.14 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y

Ground

Name Noosa Rd Capacity (ML) 0.02 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y Water quality Upstream location SEQ Water responsibility Downstream location GRC changes

6.4 Process Variations

6.4.1 Plant Bypass A plant bypass can be opened between the “A-series” and the “B-series” pumps. The possibility for leakage or unauthorised opening requires a review of the procedural and physical barriers for the Bypass.

6.4.2 Process Step Bypass Each process step cannot be bypassed individually.

6.5 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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6.5.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Raw Raw Raw Raw Raw Raw Raw Variable pH Turbidity Colour Alkalinity Hardness Aluminium Iron Manganese Fluoride [Unit] NTU HU meq/L mg/L mg/L mg/L mg/L mg/L

No. of Samples 821 821 820 821 34 56 56 56 375 Maximum 8.30 1120 8000 138 144 0.13 1.22 0.20 0.26 Minimum 6.65 2.2 10 20 40 0.007 0.014 0.022 0.06 Average 7.52 34 301 91 99 0.036 0.348 0.060 0.11 Appendix 1 contains Gympie Water Scheme Data from 1st January 2010 to 31st March 2012.

6.6 Raw Water Quality Data Interpretation Data is available for the Jones Hill Water Treatment Plant for more than 50 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Jones Hill Water Treatment Plant is generally consistent, with operational parameters recorded daily or weekly. The only variable with gaps in the recorded data is the raw hardness.

Raw Water Quality Trends (refer to following Charts): • Turbidity is related to rain events and is therefore seasonal. Generally steady and low values (<20 NTU) from May to October, with sudden spikes during the rest of the year which are related to rainfall. These spikes regularly top 100 NTU, often above 200 NTU and occasionally 400 NTU or above. This same behaviour is seen with colour with winter month lows of <10 HU, spikes often above 40 HU and occasionally above 1000 HU. The extreme peaks in turbidity and colour are generally related to heavy rainfall in the Mary River catchment. • pH is seasonal, probably related to rainfall. It is generally >7.5 from May to October, with occasional lows below 7.0. This behaviour can also be seen with alkalinity and hardness, which both see high values during May to October (alkalinity >100 meq/L, hardness >800 mg/L). • Aluminium and Manganese in the raw water are generally low (usually <0.1mg/L) and steady. There are small, sustained increases generally during the high rainfall summer months up to 0.2 mg/L. • Iron is much more variable than the Aluminium and Manganese, but once again shows generally low levels of <0.2 mg/L during the dry winter months and peaks of up to 0.8 mg/L during the wetter summer months.

Generally, the raw water from the plant has consistently lower turbidity and colour during the dry months of May to October. During the rainfall events in the catchment of the Mary River during the summer months all parameters experience high variability. This is most likely due to run off of water from land.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

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6.6.1 Chart: Gympie Raw Water Quality (Turbidity and pH)

Raw Turbidity Raw pH

500 8.5

400 8

300 7.5 pH

Turbidity [NTU] Turbidity 200 7

100 6.5

0 6 1/01/2010 1/02/2010 1/03/2010 1/04/2010 1/05/2010 1/06/2010 1/07/2010 1/08/2010 1/09/2010 1/10/2010 1/11/2010 1/12/2010 1/01/2011 1/02/2011 1/03/2011 1/04/2011 1/05/2011 1/06/2011 1/07/2011 1/08/2011 1/09/2011 1/10/2011 1/11/2011 1/12/2011 1/01/2012 1/02/2012 1/03/2012

6.6.2 Chart: Gympie Raw Water Quality (Alkalinity, Hardness and Colour)

Raw Alkalinity Raw Hardness Raw Colour

200 2000

180 1800

160 1600

140 1400

120 1200

100 1000

80 800 Alkalinity [meq/L]

60 600 [mg/L] Hardness & [HU] Colour

40 400

20 200

0 0 1/11/2011 1/12/2011 1/01/2012 1/02/2012 1/03/2012 1/08/2011 1/09/2011 1/10/2011 1/04/2011 1/05/2011 1/06/2011 1/07/2011 1/12/2010 1/01/2011 1/02/2011 1/03/2011 1/05/2010 1/06/2010 1/07/2010 1/08/2010 1/09/2010 1/10/2010 1/11/2010 1/01/2010 1/02/2010 1/03/2010 1/04/2010

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6.6.3 Chart: Gympie Raw Water Quality (Aluminium, Manganese, Iron and Fluoride)

Raw Aluminium Raw Manganese Raw Iron Raw Fluoride

0.8

0.6 [mg/L]

0.4

0.2

6.7 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

6.7.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Treated Chlorine Chlorine Variable pH Turbidit Colour Fluoride Aluminium Iron 15" Manganese Residual Residual y 15" 15" to Res1 to Res2 [Unit] NTU HU mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 821 821 820 416 56 56 56 821 821 Maximum 7.65 0.90 5.00 1.00 0.18 0.49 0.06 6.00 4.60 Minimum 7.05 0.10 0 0.01 0.003 0.002 0.003 2.2 2.2 Average 7.28 0.14 1.34 0.73 0.035 0.018 0.020 4.00 3.46 ADWG Value 6.5 - 8.5 5 15 1.5 n/a 0.3 0.1 5 5 No. of Excedences 0 0 0 0 n/a 1 0 101 0 Appendix 1 contains Gympie Water Scheme Data from 1st January 2010 to 31st March 2012.

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6.8 Treated Water Quality Data Interpretation Data is available for the Jones Hill Water Treatment Plant for more than 50 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Jones Hill Water Treatment Plant is generally consistent, with operational parameters recorded daily or weekly.

Fluoride is only available from the beginning of 2011, which is when fluoride dosing was introduced. This was not a regularly recorded parameter before the introduction of fluoride dosing.

Chorine Residual to Res 1 is the residual from the plant to the Jones Hill Reservoir 1, to Res 2 is to the Ferguson Hill Reservoir.

The Aluminium, Iron and Manganese 15” refers to the sample point on the outlet of the Clearwater Tank, post dosing.

Treated Water Quality Trends (refer to following Charts): • Turbidity, pH, Colour and Fluoride are well controlled within the specification values. Colour generally shows some variability (from 1 HU with spikes up to 5HU) during the wet summer months (October to May), with spikes related to rainfall events in the Mary Valley catchment. • pH is very well controlled. • Fluoride experienced some variability during the commissioning of the fluoride dosing plant, but is now very well controlled. • Aluminium, Iron and Manganese are all within specification values except for a single outlier for Iron on 15/3/2011. It is an isolated point and considered to be an error in the testing. Generally, the aluminium is trending down to very low values. • At the end of 2010 the filter media was replaced and the slightly higher readings of Iron and Manganese in 2011 reflect the biofilm responsible for removing iron and manganese re-establishing on the media. • Chlorine residuals in the treated water are trending downwards overall. The excedences for Chlorine Residual to Res 1 in Table 6.8.3 occurred in early 2010 and were brought under control by April 2010. The variability in the residuals (3 – 4 mg/L) is generally due to seasonal use and raw water conditions. These residuals are controlled to ensure reticulation residuals are maintained at 0.2 mg/L or above. As the plant and any reservoirs where rechlorination occurs, are some distance from the first consumers on each line, historic testing has indicated that this ensures residual levels are within ADWG limits by the time water enters the first service.

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6.8.1 Chart: Gympie Treated Water Quality (Turbidity, pH, Colour and Fluoride)

Treated Turbidity Treated Colour Treated Fluoride Treated pH

5 8.5

4.5 8.3

4 8.1

3.5 7.9

3 7.7

2.5 7.5 pH

2 7.3

1.5 7.1

Colour [HU], Turbidity [NTU], Fluoride [mg/L] Fluoride [NTU], Turbidity [HU], Colour 1 6.9

0.5 6.7

6.8.2 Chart: Gympie Treated Water Quality (Aluminium, Iron, Manganese)

Treated Aluminium 15" Treated Iron 15" Treated Manganese 15"

0.5

0.4

0.3 [mg/L]

0.2

0.1

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6.8.3 Chart: Gympie Treated Water Quality (Chlorine Residuals)

Chlorine Residual to Res1 Chlorine Residual to Res2

3 [mg/L]

6.9 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

6.9.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 1718 69 69 69 Maximum 4.45 0.10 0.00 0.00 Minimum 0.02 2.00 0.00 0.00 Average 1.06 0.84 0 0 ADWG 5 5 0 0 No. of Excedences 0 0 0 0

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Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Variable Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 5 5 5 5 5 5 5 5 5 5 Maximum 0.050 0.010 0.030 88 0.9 26 0.030 0.040 0.090 23 Minimum 0.000 0.000 0.000 28 0.5 19 0.005 0.020 0.000 17 Average 0.035 0.007 0.011 55 0.7 23 0.017 0.026 0.033 19 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Turbidity pH Colour Total Total Dissolved Fluoride Ions Variable Hardness Solids

[Unit] NTU HU mg/L mg/L mg/L No. of Samples 5 5 5 5 5 8 Maximum 1 7.70 3.0 137 285 0.92 Minimum 0 7.36 0.5 44 148 0.05 Average 1 7.59 1.3 90 211 0.54 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 No. of Excedences 0 0 0 0 0 0 Appendix 1 contains Gympie Water Scheme Data from 1st January 2010 to 31st March 2012.

6.10 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored weekly in multiple locations within the reticulation system. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 69 samples tested in this period

During this period there were 5 samples sent to Queensland Health for full Standard Water. The data shown in Table 6.9.1 is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Gympie.

The samples collected were generally at 6-monthly intervals and the results were all within ADWG guidelines.

The reticulated chlorine residuals are well controlled, both by the residuals leaving the Water Treatment Plant and the top-up chlorination at key reservoirs.

A single chlorine residual was measured in excess of 4 mg/L, however all other data shown in Chart 3.12.1 is generally <2 mg/L. This is likely to be an outlying result.

There have been no recent results for disinfection by-products; however, taste and odours are low. Previous results have shown there were no issues.

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6.10.1 Chart: Gympie Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

7 Imbil Water Scheme Imbil is a small town in the Mary Valley region. The GPS Co-ordinates of the Water Treatment Plant are GPS -26.459345, 152.670457. The Imbil WTP Quality Plan ( WSQ501) provides a process overview description.

Treatment: As the raw water enters the plant it is dosed with a coagulant (Polyaluminium chloride), then chlorine, before passing through a pressurised sand filter. The filtered water then enters a chlorine contact tank before going into the distribution system and up to the reservoir. The plant is currently being prepared for an upgrade to the treatment infrastructure. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network. This is complicated by the fact that the water is delivered to the reservoir via the network, however a chlorine contact tank and long delivery main to the system provides ample contact time and provides enough reaction time to ensure the level at the first service off-take is below maximum levels for human consumption.

Control: Plant operation is controlled by the level of water in the reservoir which is transmitted back to the plant through radio telemetry. The plant stop and start levels are adjustable through the MULTITRODE controllers. This same telemetry and MULTITRODE controllers enable the plant operations to be monitored remotely, with the ability to stop and start the pumps and reset faults. Level and plant faults are sent through to the operator on call for the Jones Hill Water Treatment Plant. The plant is currently being prepared for an upgrade to the control and monitoring infrastructure. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

Reticulation: System floats on reservoir. Treated water is pumped through the network to replenish reservoir daily.

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7.1 Table: Scheme Summary Scheme Name Imbil Water Supply Scheme Source Yabba Creek Allocation 160 ML/annum - High and Medium Priority Treatment Process Contact Filtration and disinfection Plant Capacity 600 kL/day Pump Stations 1 Length of Mains (km) 7.9 Number 1 Reservoirs Capacity (ML) 0.7 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 655 (est.) 577 Connections[*3] 252 (est.) 240 Annual Water Consumption (ML) 87 58 Estimated Unaccounted Water (kL) [*1] 11 13.3 Consumption : Allocation 0.54:1 0.97:1 MDMM : Plant Capacity 0.56:1 0.32:1 MAXIMUM DAILY USAGE (kL/day) 394 252 MDMM (MEAN DAILY MAXIMUM MONTH) 336 194 Average Daily Usage (kL/day) 238 160 Average Water Consumption (l/EP/day) 363[*2] 277 Rainfall (mm) 1,122 1,840 Power Used/kWh 49,195 Chemical Usage 2009/2010 2010/2011 Chemical Use per ML Treated (L/ML) Chlorine 99.6 79.4 Polymer 1.49 5.8 PACL 6.25 3.4 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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7.2 Schematic: Imbil Water Treatment Plant

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7.3 Diagram: Distribution and Reticulation Imbil

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7.4 Table: Infrastructure Details Component Scheme Sources Name Borumba Dam River Intake from Type Yabba Creek % of supply 100 Depends on timely releases from Dam Reliability Manager blue-green algae, dirty water, arsenic; Animal Faeces; Timber milling by- Water quality issues products Sourcing Infrastructure Pumped from rock and geofabric screened pump well at River Type (pumped/gravity/equipped bore/etc) Intake Intake on Yabba Description Creek Treatment Plant Imbil Water Name treatment Plant Chlorination, Poly dosing and sand Process filtration Design Capacity (20 hr operation) 0.6ML/d Daily flow range 0.2-0.6ML/d Sodium Hypochlorite, Chemicals added polymer (PACL) Standby chemical dosing facilities (Y/N) Y- Manual

100% exclusive to Water sourced from and % above % of average day demand provided 100 % of scheme supply distribution area supplied 100 Bypasses / Variations Filter Are there any sources that do not undergo disinfection prior to supply? No Disinfection Imbil WTP Raw Location Water Pipeline Sodium Type Hypochlorite Dose rate 10-15 mg/L Target residual levels 4 mg/L leaving

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Component Scheme plant Duty/standby Y- Manual Dosing arrangements fixed Alarms N

Auto shut-off arrangements N Distribution and Pipe material Asbestos Cement Reticulation System Age range Average 50 Yrs Approx. % of total length 100% of 7.9km Areas where potential long detention periods could be Reservoir and expected Showgrounds N/A

Areas where low water pressure (eg < 12 m) could be expected during peak or other demand periods) Reservoirs Ground Name Imbil Reservoir Capacity (ML) 0.75 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y Water quality Upstream location SEQ Water responsibility changes Downstream location GRC

7.5 Process Variations

7.5.1 Plant Bypass There is no entire plant bypass for Imbil Water Treatment Plant.

7.5.2 Process Step Bypass The filter can by bypassed, as shown in the previous Schematic. The backwash process requires this bypass to be open to provide backwash water to the filter. Procedures specify that the inlet valve to the contact tank be closed when this is in process. The backwash procedure also requires the dosing of Sodium Hypochlorite to begin before the backwash is complete, ensuring disinfection of the contents of the filter prior to being brought back online.

7.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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7.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw pH Raw Raw Colour Raw Iron Raw Variable Turbidity Manganese [Unit] NTU HU mg/L mg/L

No. of Samples 102 102 102 47 51 Maximum 8.33 224 1708 0.389 0.610 Minimum 7.15 0.9 29 0.020 0.036 Average 7.52 11.1 137 0.121 0.097 Appendix 1 contains Imbil Water Scheme Data from 1st January 2010 to 31st March 2012.

7.7 Raw Water Quality Data Interpretation Data is available for the Imbil Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Imbil Water Treatment Plant is generally consistent, with operational parameters recorded weekly or fortnightly.

Raw Water Quality Trends (refer to the following Charts): • Turbidity is related to rain events and is therefore seasonal. Generally steady and low values (<5 NTU) from May to October, with sudden spikes during the rest of the year which are related to rainfall. These spikes regularly top 5 NTU and occasionally up to 20 NTU. This same behaviour is seen with colour with winter month lows of <5 HU, spikes often above 5 HU and occasionally above 15 HU. • pH is generally steady with an average of 7.52. • Manganese in the raw water are generally low (usually <0.2mg/L) and steady. There are small, sustained increases generally during the high rainfall summer months up to 0.4 or 0.6 mg/L. • Iron shows generally low levels of <0.2 mg/L during the dry winter months and peaks of up to 0.4 mg/L during the wetter summer months.

Generally, the raw water from the plant has consistently lower turbidity and colour during the dry months of May to October. During the rainfall events in the catchments of Yabba Creek and Borumba Dam during the summer months all parameters experience slight variability.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

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7.7.1 Chart: Imbil Raw Water Quality (Turbidity, pH and Colour)

Raw pH Raw Turbidity Raw Colour

25 500

450

20 400

350

15 300

250 Colour [HU] Colour 10 200 pH, Turbidity [NTU] Turbidity pH,

150

5 100

0 0 1/01/2010 1/02/2010 1/03/2010 1/04/2010 1/05/2010 1/06/2010 1/07/2010 1/08/2010 1/09/2010 1/10/2010 1/11/2010 1/12/2010 1/01/2011 1/02/2011 1/03/2011 1/04/2011 1/05/2011 1/06/2011 1/07/2011 1/08/2011 1/09/2011 1/10/2011 1/11/2011 1/12/2011 1/01/2012 1/02/2012 1/03/2012

7.7.2 Chart: Imbil Raw Water Quality (Manganese and Iron)

Raw Iron Raw Manganese

0.8

0.6 [mg/L]

0.4

0.2

7.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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7.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Chlorine Variable pH Turbidity Colour Aluminium Iron Manganese Residual [Unit] NTU HU mg/L mg/L mg/L mg/L No. of Samples 104 104 104 47 52 52 228 Maximum 7.70 1.4 13.0 0.097 0.047 0.027 5.00 Minimum 6.80 0.1 1.0 0.003 0.002 0.001 1.60 Average 7.35 0.4 3.3 0.020 0.014 0.010 3.36 ADWG Value 6.5 - 8.5 5 15 0.2 0.3 0.1 5 No. of Excedences 0 0 0 0 0 0 0 Appendix 1 contains Imbil Water Scheme Data from 1st January 2010 to 31st March 2012.

7.9 Treated Water Quality Data Interpretation Data is available for the Imbil Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Imbil Water Treatment Plant is generally consistent, with operational parameters recorded weekly or fortnightly.

Treated Water Quality Trends (refer to the following Charts): • Turbidity is generally very low (average 0.4 NTU) and well controlled. • pH is not controlled; however the raw water pH is consistent resulting in a consistent treated water pH (average 7.35). • Aluminium, Iron and Manganese in the treated water are generally low and well controlled (all less than 0.1 mg/L). • Chlorine residuals are all within ADWG guidelines and generally high (average 3.36 mg/L). This is highly variable and is controlled to chlorine residuals measured in the reticulation system. It needs to be relatively high because pumping is via the network, not direct to the reservoir, allowing limited contact time for close areas of the network. Some sections of the network are also prone to extended retention times, requiring high levels of initial dosing to maintain residuals. Dosing has to be at the start of the treatment process, to help oxidise and remove iron and manganese through the filters and therefore carry through of a residual is more unpredictable, again leading to higher initial levels being specified. Target ranges are set over a wide spread to accommodate variable water conditions, which largely affect the process efficiency of the plant. • Data presented reflects that held on the Gympie Water & Sewer Database for the period considered and does not include all data collected for the period, leading to gaps being evident in the graphs. The remaining data is not in digital form, but is on paper, which is stored at the plants.

The Imbil Water Treatment Plant controls the above parameters well, keeping within the ADWG.

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7.9.1 Chart: Imbil Treated Water Quality (Turbidity, pH and Colour)

Treated pH Treated Turbidity Treated Colour

10 pH, Turbitdy [NTU], Colour [HU] Colour [NTU], Turbitdy pH,

7.9.2 Chart: Imbil Treated Water Quality (Aluminium, Iron, Manganese)

Treated Aluminium Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

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7.9.3 Chart: Imbil Treated Water Quality (Chlorine Residuals)

3 [mg/L]

7.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

7.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 265 18 18 18 Maximum 5.00 5.00 0.00 0.00 Minimum 0.05 0.10 0.00 0.00 Average 1.61 1.10 ADWG 5 5 0 0 No. of Excedences 0 0 0 0

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Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Variable Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 2 2 2 1 1 1 1 1 1 1 Maximum 0.049 0.009 0.009 55 0.5 6 0.010 0.030 0.250 18 Minimum 0.040 0.009 0.009 55 0.5 6 0.010 0.030 0.250 18 Average 0.045 0.009 0.009 55 0.5 6 0.010 0.030 0.250 18 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Turbidity pH Colour Total Total Dissolved Fluoride Bromate Chlorate Variable Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L mg/L mg/L No. of Samples 3 6 1 5 1 1 2 2 Maximum 3 7.96 5.0 130 202 0.08 0.000 0.290 Minimum 1 7.15 5.0 88 202 0.08 0.000 0.020 Average 2 7.38 5.0 113 202 0.08 0.000 0.155 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 0.02 No. of Excedences 0 0 0 0 0 0 0 n/a Appendix 1 contains Imbil Water Scheme Data from 1st January 2010 to 31st March 2012.

7.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored weekly in multiple locations within the reticulation system. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 19 samples tested in this period

During this period there was 1 sample sent to Queensland Health for full Standard Water in November 2010, and all other data was performed by operators. All variables are within ADWG guidelines.

The data shown in Table 7.10.1 is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Imbil.

The reticulated chlorine residuals are highly variable, controlled only by the residuals leaving the Water Treatment Plant. There is a gap in the computerised data from September 2010 to January 2011. Some skewing of the data is a result of sampling being done too close to the injection point at the plant, before suitable mixing can take place. This point is well away from the first customer service and poses no threat to public health.

Disinfection by-products are present, as confirmed by chlorate and a strong “chlorine” taste and odour.

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7.11.1 Chart: Imbil Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

8 Kandanga Water Scheme Kandanga is a small town in the Mary Valley region. The GPS Co-ordinates of the Water Treatment Plant are GPS -26.389726, 152.673848. The Kandanga WTP Quality Plan (WSQ541) provides a process overview description.

Treatment: As the raw water enters the plant it is dosed with a coagulant (Poly-aluminium chloride), then chlorine, before passing through a pressurised sand filter. The filtered water then enters a chlorine contact tank before going into the distribution system and up to the reservoir. The plant is currently being prepared for an upgrade to the treatment infrastructure. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network. This is complicated by the fact that the water is delivered to the reservoir via the network, however a chlorine contact tank and long delivery main to the system provides ample contact time and provides enough reaction time to ensure the level at the first service off-take is below maximum levels for human consumption.

Reticulation: Network floats on Reservoir. Treated water is pumped through the network to replenish reservoir when plant is running. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

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8.1 Table: Scheme Summary Scheme Name Kandanga Water Supply Scheme Source Kandanga Creek and Kandanga Bore (emergency only)

Allocation 59 ML/annum Process Contact filtration and disinfection Treatment Plant Capacity 400 kL/day Pump Stations 2 Length of Mains (km) 3.4 Number 1 Reservoirs Capacity (ML) 0.255 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 299 (est.) 263 Connections[*3] 115 (est.) 110 Annual Water Consumption (ML) 25 22 Estimated Unaccounted Water (kL)[*1] 5 6.1 Consumption : Allocation 0.42:1 0.38:1 MDMM : Plant Capacity 0.42:1 0.31:1 No of Years Growth at 1% Before Allocation Exceeded 139 59 MAXIMUM DAILY USAGE (kL/day) 202 108 MDMM (MEAN DAILY MAXIMUM MONTH) (kL/day) 107 80 Average Daily Usage (kL/day) 68 61 Average Water Consumption (L/EP/day) 226[*2] 231 Rainfall (mm) 704.7 1,522 Power Used/kWh 11,735 Chemical Usage 2009/2010 2010/2011 Chemical Use per ML Treated (L/ML) Chlorine 82.4 47.6 Polymer 0.9 2.7 PACL 16.2 2.8 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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8.2 Schematic: Kandanga Water Treatment Plant

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8.3 Diagram: Distribution and Reticulation Kandanga

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8.4 Table: Infrastructure Details Component Scheme Sources Name Kandanga Creek Type Weir in Creek % of supply 100 Reliability Unreliable in drought Water quality issues Dirty water in wet; Stagnant in dry Name Kandanga Bore Bore, pressure sealed and concrete Type encased % of supply 0 Reliability Poor Water quality issues Not Used in 10 yrs. High Manganese Sourcing Type (pumped/gravity/equipped bore/etc) 2x 5.5L/s Pumps/ Bore Pump Infrastructure Rock and geofabric screened pump well Description at river intake above Weir Treatment Plant Name Kandanga Water Treatment Plant Pre-chlorination, poly dosing and sand Process filtration Design Capacity (20 hr operation) 0.4ML/d Daily flow range .05-0.6ML/d Chemicals added Chlorine, polymer (PACL) No- Spares and technical staff available to replace faulty equipment within Standby chemical dosing facilities (Y/N) system reserve capacity buffer. Water sourced from and % 100% exclusive to above % of average day demand provided 100 % of scheme supply distribution area supplied 100 Bypass Filters & Contact Tanks/ Chlorine Bypasses / Variations Dosing Are there any sources that do not undergo disinfection prior to supply? Bore not used; Can bypass disinfection Disinfection Location Kandanga WTP Raw Water Pipeline Type Hypochlorite Dose rate 10-15 mg/L Target residual levels 4 mg/L at Plant Duty/standby No- Spare available Dosing arrangements fixed Alarms N Auto shut-off arrangements N Distribution and Pipe material Asbestos Cement Reticulation Age range Average 50+ Years System Approx. % of total length 100% of 3.4 km Areas where potential long detention periods Dead ends where domestic is only use could be expected

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Component Scheme Areas where low water pressure (eg < 12 m) N/A could be expected during peak or other demand periods) Reservoirs A Ground Name Kandanga Reservoir Capacity (ML) 0.255 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y Water quality Upstream location N/A responsibility N/A changes Downstream location

8.5 Process Variations

8.5.1 Plant Bypass There is no entire plant bypass for Kandanga Water Treatment Plant.

8.5.2 Process Step Bypass The filter and chlorine contact tank, including post dosing, can by bypassed, as shown in the previous Schematic. The backwash process does not require this bypass to be open. Procedures specify that the inlet valve to the contact tank be closed when performing a backwash. The backwash procedure also requires the dosing of Sodium Hypochlorite to begin before the backwash is complete, ensuring disinfection of the contents of the filter prior to being brought back online.

8.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown are stored either at the Treatment Plant, or archived with Council’s Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

8.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Variable Raw pH Turbidity Raw Colour Raw Iron Manganese Units [NTU] [HU] [mg/L] [mg/L] No. of Samples 104 104 104 48 54 Maximum 8.00 160 1400 0.524 0.593 Minimum 7.12 1.5 20 0.031 0.003 Average 7.63 13.85 144.80 0.193 0.120 Appendix 1 contains Kandanga Water Scheme Data from 1st January 2010 to 31st March 2012.

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8.7 Raw Water Quality Data Interpretation Data is available for the Kandanga Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Kandanga Water Treatment Plant is generally consistent, with operational parameters recorded weekly or fortnightly.

Raw Water Quality Trends (refer to the following Charts): • Turbidity is related to rain events and is therefore seasonal. Generally steady and medium values (<20 NTU) from May to October, with sudden spikes during the rest of the year which are related to rainfall. These spikes regularly top 50 NTU but rarely top 100 NTU. This same behaviour is seen with colour with winter month values usually <200 HU, spikes often above 200 HU and occasionally above 600 HU. • pH is variable but within a range of 7.12 – 8. averaging 7.63. • Manganese in the raw water is generally low (usually <0.2mg/L) and steady. There are small sustained increases generally during the high rainfall summer months but rarely above 0.4 mg/L. • Iron shows generally medium levels of <0.4 mg/L. Peaks of up to 0.4 mg/L during the wetter summer months.

Generally, the raw water to the plant has consistently lower turbidity and colour during the dry months of May to October. During the rainfall events in the catchment of Kandanga Creek during the summer months all parameters experience variability. Operation of the plant changes at these times in terms of coagulant dosing volumes and more regular back washing of the filters to maintain operational levels of head loss.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

8.7.1 Chart: Kandanga Raw Water Quality (Turbidity, pH and Colour)

Raw Turbidity Raw Colour Raw pH

1000 9

800 8.5

600 8 pH

400 7.5 Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity

200 7

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8.7.2 Chart: Kandanga Raw Water Quality (Manganese and Iron)

Raw Iron Raw Manganese

0.8

0.6 [mg/L]

0.4

0.2

8.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

8.8.1 Table: Treated Water Quality Treated Treated Treated Treated Treated Treated Chlorine Variable pH Turbidity Colour Aluminium Iron Manganese Residual [Unit] NTU HU mg/L mg/L mg/L mg/L No. of Samples 107 107 107 51 54 54 183 Maximum 8.05 3.10 23 0.079 0.076 0.031 5.00 Minimum 7.05 0 1 0.003 0.002 0.002 1.00 Average 7.63 0.48 3.6 0.019 0.029 0.012 3.27 ADWG Value 6.5 - 8.5 5 15 0.200 0.300 0.100 5 No. of Excedences 0 0 1 0 0 0 0 Appendix 1 contains Kandanga Water Scheme Data from 1st January 2010 to 31st March 2012.

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8.9 Treated Water Quality Data Interpretation Data is available for the Kandanga Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Kandanga Water Treatment Plant is generally consistent, with operational parameters recorded weekly or fortnightly.

Treated Water Quality Trends (refer to the following Charts): • Turbidity is generally very low (average 0.48 NTU) and well controlled. Colour is low and steady during the dry winter months (May to October) with high variability during the wet summer months. The single out of ADWG guideline value of 23 occurred after an extreme rain event in February 2012. • pH is not controlled as part of the process, but remains well within ADWG guidelines. • Aluminium, Iron and Manganese in the treated water are generally low and well controlled (all less than 0.1 mg/L). • Chlorine residuals are all within ADWG guidelines and generally high (average 3.27 mg/L). This is highly variable and is controlled to chlorine residuals measured in the reticulation system. It needs to be relatively high because pumping is via the network, not direct to the reservoir, allowing limited contact time for close areas of the network. Some sections of the network are also prone to extended retention times, requiring high levels of initial dosing to maintain residuals. Dosing has to be at the start of the treatment process, to help oxidise and remove iron and manganese through the filters and therefore carry through of a residual is more unpredictable, again leading to higher initial levels being specified. Target ranges are set over a wide spread to accommodate variable water conditions, which largely affect the process efficiency of the plant.

The Kandanga Water Treatment Plant controls most of the above parameters well, keeping within the ADWG. Colour is variable, dependent on rainfalls in the Kandanga Creek catchment area.

8.9.1 Chart: Kandanga Treated Water Quality (Turbidity, pH and Colour)

Treated Turbidity Treated Colour Treated pH

25 8.5

20 8

7.5 pH

10 Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity

7 5

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8.9.2 Chart: Kandanga Treated Water Quality (Aluminium, Iron, Manganese)

Treated Aluminium Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

8.9.3 Chart: Kandanga Treated Water Quality (Chlorine Residuals)

3 [mg/L]

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8.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

8.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 278 19 19 19 Maximum 5.00 7.70 12.00 0.00 Minimum 0.00 0.00 0.00 0.00 Average 1.21 1.07 ADWG 5 5 0 0 No. of Excedences 0 0 0 0

Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Variable Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 2 2 2 2 2 2 2 2 2 2 Maximum 0.049 0.009 0.020 66 0.8 8 0.010 0.040 0.030 28 Minimum 0.040 0.009 0.009 50 0.5 8 0.009 0.030 0.029 26 Average 0.045 0.009 0.015 58 0.6 8 0.010 0.035 0.030 27 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Turbidity pH Colour Total Total Dissolved Fluoride Bromate Chlorate Variable Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L mg/L mg/L No. of Samples 2 5 2 5 2 2 2 2 Maximum 1 8.00 4.0 218 292 0.07 0.000 0.290 Minimum 1 7.57 3.0 94 195 0.05 0.000 0.020 Average 1 7.71 3.5 169 244 0.06 0.000 0.150 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 0.02 No. of Excedences 0 0 0 2 0 0 0 n/a

Appendix 1 contains Kandanga Water Scheme Data from 1st January 2010 to 31st March 2012.

8.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored weekly in multiple locations within the reticulation system. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine

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Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 19 samples tested in this period

During this period there were 2 samples sent to Queensland Health for full Standard Water Analysis. All variables are within ADWG values except for 2 of the Total Hardness which was outside the aesthetic value (200 mg/L), but within the Health Guideline (500 mg/L). Both of these high value samples were taken in February 2011, with the subsequent sample in March 2011 within aesthetic guidelines.

The data shown in Table 8.10.1 is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Kandanga.

The reticulated chlorine residuals are variable, controlled only by the residuals leaving the Water Treatment Plant. There is a gap in the computerised data from September 2010 to January 2011. The residuals are generally <3mg/L with an average of 1.21mg/L. Due to the low flows in sections of the reticulation system, there are usually very low readings (the only value of 0 occurred in March 2011). Some skewing of the data is a result of sampling being done too close to the injection point at the plant, before suitable mixing can take place. This point is well away from the first customer service and poses no threat to public health.

Disinfection by-products are present, as indicated by chlorate and a strong “chlorine” taste and odour.

8.11.1 Chart: Kandanga Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

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9 Kilkivan Water Scheme Kilkivan is a small town in the Western region. The GPS Co-ordinates of the Water Treatment Plant are GPS -26.078891, 152.244405. The Kandanga WTP Quality Plan (WSQ541) provides a process overview description.

Treatment: As the blended raw water enters the plant it is dosed with a coagulant (Polyaluminium chloride), then chlorine, before passing through a pressurised sand filter and thence through Reverse Osmosis Filtration. The filtered water then enters a chlorine contact tank before going into the distribution system and up to the reservoir. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network.

Reticulation: Network works off float from reservoir. Treated water is pumped through the network to replenish reservoir whilst plant is running. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

9.1 Table: Scheme Summary Scheme Name Kilkivan Water Supply Scheme Source Wide Bay Creek Process Reverse Osmosis Filtration and Chlorination Treatment Plant Capacity 200kL/day Pump Stations 1 Length of Mains (Km) 26.6 Number 1 Reservoirs Capacity 210,000 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 590 (est.) 596 Connections[*3] 246 (est.) 248 Annual Water Consumption (ML) 45 28 Estimated Unaccounted Water (kL)[*1] 10 13.8 MAXIMUM DAILY USAGE (kL/day) 244 120 MDMM (MEAN DAILY MAXIMUM MONTH) (kL/day) 159 117 Average Daily Usage (kL/day) 123 78 Average Water Consumption (L/EP/day) 209[*2] 131 Rainfall(mm) 801.6 1,978 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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9.2 Schematic: Kilkivan Water Treatment Plant

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9.3 Diagram: Distribution and Reticulation Kilkivan

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9.4 Table: Infrastructure Details Component Scheme Source 1 Name Wide Bay Creek Type Off-stream Storages % of supply 0% Reliability Unreliable in Drought Water quality issues blue-green algae, Duckweed Sourcing Type (pumped/gravity/equipped Infrastructure bore/etc) Pumped from screened river intake Description Earth Tanks Source 2 Name Whitaker Rd Bore Type Sub-artesian Bore field % of supply 40% Reliability High- fed by 2 streams Water quality issues Mineral content Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete Infrastructure bore/etc) encased and concrete encased Bore Description Bore Depth:20m Source 3 Name Mudlo Bore Type Sub-artesian Bore field % of supply 10% Reliability Low- slows in dry Water quality issues Mineral content Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete Infrastructure bore/etc) encased Bore Description Bore Depth:26m Source 4 Name Showgrounds Bore Type Sub-artesian Bore field % of supply 50% Reliability High- fed from Wide Bay Creek Water quality issues Mineral content Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete Infrastructure bore/etc) encased Bore Description Bore Depth:14m Source 5 Name Running Creek Bore Type Sub-artesian Bore field % of supply 0% Reliability Low-not commissioned Water quality issues Mineral content Sourcing Type (pumped/gravity/equipped Equipped pressure sealed and concrete Infrastructure bore/etc) encased Bore Description Bore Depth:6m Name Kilkivan Water Treatment Plant Sand Filter, Carbon Filtration, Reverse Treatment Osmosis, pH Correction, Filtrate Mixing and Plant Process Chlorination Design Capacity (20 hr operation) 0.2ML/d @ 4L/s EWSQ040 Page 71 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Component Scheme Daily flow range 0-0.2ML/d @8 L/s Chemicals added Chlorine, Soda Ash No. Spares and technical staff available to replace faulty equipment within system Standby chemical dosing facilities (Y/N) reserve capacity buffer. Water sourced from and % 100% exclusive to above % of average day demand provided 100 % of scheme supply distribution area supplied 100 Bypass R/O or whole of plant from bore or Bypasses / Variations off-stream storage Are there any sources that do not undergo disinfection prior to supply? No Location WTP Type Sodium Hypochlorite Disinfection Dose rate 0.8mg/L Target residual levels 0.4mg/L Duty/standby N Dosing arrangements flow paced Alarms No Auto shut-off arrangements No Distribution Pipe material 75% AC; 25% Blue Brut and Age range 50-20yrs Reticulation Approx. % of total length % of 26.6km System Areas where potential long detention Towards Dump; 150mm Main; showgrounds periods could be expected Areas where low water pressure (eg < 12 m) could be expected during peak or No other demand periods)

Reservoirs A Ground Name Kilkivan

Capacity (ML) 0.6ML

Roofed (Y/N) Y

Y Vermin-proof (Y/N) Runoff directed off roof (Y/N) Y Water quality Upstream location N/A responsibility GRC changes Downstream location

9.5 Process Variations

9.5.1 Plant Bypass A plant bypass exists, and is operated outside the Water Treatment Plant boundaries. This connects the bore water through to the reticulation water. The possibility for leakage or unauthorised opening requires a review of the procedural and physical barriers for the Bypass.

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9.5.2 Process Step Bypass The Reverse Osmosis plant can be bypassed. In the case of equipment failure, the plant can be bypassed and filtered water is disinfected for reticulated use. The trend of the Hardness is increasing; however, it does not usually exceed the aesthetic ADWG value. This is dependent on the source bore water quality. The normal process is for filtered water to be blended with the Reverse Osmosis water to prevent the water becoming too soft.

9.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with council’s Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

The general design principles behind the system and treatment plant are that creek water from the off-stream storage is blended with various bore water sources to supply raw water to the plant. For much of the period represented in the following data, it was not possible to operate the system in this manner due to drought. This is reflected in the proportions of source water identified as being used in table 9.4 also.

9.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Raw Raw Raw Raw Raw Variable pH Turbidity Colour Alkalinity Hardness Iron Manganese [Unit] NTU HU meq/L mg/L mg/L mg/L No. of Samples 27 27 27 27 27 27 27 Maximum 7.60 0.60 15 542 600 0.081 0.068 Minimum 6.98 0.10 0 321 400 0.004 0.021 Average 7.21 0.18 4 375 502 0.011 0.039 Appendix 1 contains Kilkivan Water Scheme Data from 1st January 2010 to 31st March 2012.

9.7 Raw Water Quality Data Interpretation Data is available for the Kilkivan Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Kilkivan Water Treatment Plant is generally consistent, with operational parameters recorded fortnightly or monthly.

Raw Water Quality Trends (refer to the following Charts): • Over this period, the raw water sourced for Kilkivan was exclusively from bores. • Turbidity is consistently very low, with an average of 0.18 NTU. • pH is steady, averaging 7.21. • Colour peaked at 27 HU in -2010, but has trended down to <4HU to mid-2012. • Alkalinity has trended flat, averaging 375 meq/L. • Both Manganese and Iron trend very low, both <0.08 mg/L.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

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9.7.1 Chart: Kilkivan Raw Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness)

Raw pH Raw Turbidity Raw Colour Raw Alkalinity Raw Hardness

12 600

10 500

8 400

6 300

4 200 pH, Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity pH, Alkalinity [meq/L], Hardness [mg/L] Hardness [meq/L], Alkalinity

2 100

9.7.2 Chart: Kilkivan Raw Water Quality (Manganese and Iron)

Raw Iron Raw Manganese

0.8

0.6 [mg/L]

0.4

0.2

9.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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9.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Treated Variable pH Turbidity Colour Alkalinity Hardness Iron Manganese [Unit] NTU HU meq/L mg/L mg/L mg/L No. of Samples 26 27 26 26 21 27 27 Maximum 7.64 0.2 0 306 155 0.008 0.009 Minimum 7.11 0.0 0 146 124 0.003 0.002 Average 7.23 0.1 0 240 140 0.005 0.005 ADWG Value 6.5 - 8.5 5 15 n/a 500 0.3 0.1 No. of Excedences 0 0 0 n/a 0 0 0 Appendix 1 contains Kilkivan Water Scheme Data from 1st January 2010 to 31st March 2012.

9.9 Treated Water Quality Data Interpretation Data is available for the Kilkivan Water Treatment Plant for more than 5 years. Council has information available on our database from 1st January 2010.

The data available for the Kilkivan Water Treatment Plant is generally consistent, with operational parameters recorded fortnightly or monthly.

Treated Water Quality Trends (refer to the following Charts): • Turbidity is consistently very low (average 0.10 NTU) and well controlled. • Colour is also consistently very low, showing 0 HU for all samples. • pH is well controlled as part of the process with an average of 7.23. • Hardness is controlled at the Kilkivan Water Treatment Plant by bypassing the Reverse Osmosis section with filtered water and blending before final dosing. This is well controlled at an average of 140 mg/L. • Iron and Manganese in the treated water are consistently low (<0.01 mg/L). • Sodium Hypochlorite is dosed at the outlet of the Kilkivan Water Treatment Plant, but not measured. It is controlled to reticulation Chlorine residual tests. • Data presented reflects that held on the Gympie Water & Sewer Database for the period considered and does not include all data collected for the period, leading to gaps being evident in the graphs. The remaining data is not in digital form, but is on paper, which is stored at the plants.

The Kilkivan Water Treatment Plant controls the above parameters well, keeping within the ADWG.

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9.9.1 Chart: Kilkivan Treated Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness)

Treated pH Treated Turbidity Treated Colour Treated Alkalinity Treated Hardness

8 400

350

6 300

250

4 200

150

pH, Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity pH, 2 100 Alkalinity [meq/L], Hardness [mg/L] Hardness [meq/L], Alkalinity

9.9.2 Chart: Kilkivan Treated Water Quality (Iron, Manganese)

Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

9.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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9.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 160 27 27 27 Maximum 4.00 1.80 1.00 1.00 Minimum 0.07 0.10 0.00 0.00 Average 0.72 0.65 ADWG 5 5 0 0 No. of Excedences 0 0 1 1

Variable Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 6 6 6 6 6 6 6 6 6 6 Maximum 0.050 0.010 0.010 85 0.6 8 0.200 0.060 0.040 13 Minimum 0.000 0.000 0.000 41 0.0 4 0.005 0.010 0.000 3 Average 0.022 0.006 0.006 56 0.4 6 0.041 0.042 0.020 10 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Variable Turbidity pH Colour Total Total Dissolved Fluoride Bromate Chlorate Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L mg/L mg/L No. of Samples 6 6 6 6 6 6 1 1 Maximum 5 8.18 3.0 154.0 291 0.10 0.000 0.590 Minimum 1 7.31 0.0 107.0 216 0.00 0.000 0.590 Average 2 7.78 1.7 119.5 241 0.06 0.000 0.590 ADWG Value 5 6.5 - 8.5 15 600 1.50 0.02 No. of Excedences 0 0 0 n/a 0 0 0 n/a Appendix 1 contains Kilkivan Water Scheme Data from 1st January 2010 to 31st March 2012.

9.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored fortnightly in multiple locations within the reticulation system. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 27 samples tested in this period.

There was one pathogen result that showed positive for Coliforms and e-Coli on 16/8/2011. The chlorine residual was 0.4 mg/L for the same sample and all subsequent samples were negative. This indicates a possible fault with the sampling procedure.

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During this period there were 6 samples sent to Queensland Health for full Standard Water Analysis. All variables are within ADWG guidelines. The data shown in Table 9.10.1 is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Kilkivan.

The reticulated chlorine residual data is available for the entire period shown, but not available within the database. However it can be seen that in early 2010 the data was variable, up to 4 mg/L. Data from January 2011 demonstrates that the residuals are now controlled to a much lower lever across the reticulation system (all <1 mg/L). These residuals are controlled by the Sodium Hypochlorite dosing at the Kilkivan Water Treatment Plant.

Disinfection by-products are present, as indicated by chlorate and a strong “chlorine” taste and odour.

9.11.1 Chart: Kilkivan Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

10 Rainbow Beach Water Scheme Rainbow Beach is a small coastal town in the Cooloola region. The GPS Co-ordinates of the Water Treatment Plant are GPS -25.929666, 153.082134. The Rainbow Beach WTP Quality Plan (WSQ351) provides a process overview description.

Treatment: Bore water is pumped from the three bores through a pressurised sand filter at the treatment plant. After filtration, the water is dosed with soda ash for pH correction and chlorine for disinfection before it enters the clear water tank. From the clear water tank, the finished water is pumped via clear water pumps and booster pumps into two storage reservoirs in town. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network.

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Reticulation: Network floats off Reservoirs and is replenished by pumping during plant operation. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these present the highest risk to break down of general water quality also.

10.1 Table: Scheme Summary Scheme Name Rainbow Beach Water Supply Scheme Source Bores

Allocation 730 ML/annum Closed system pH correction, filtration and Process Treatment Plant chlorination Capacity 2,520 kL/day Pump Stations 2 Length of Mains (km) 29.3 Number 2 Reservoirs Capacity (ML) 2.9 Zone Location Capacity (ML) Reservoir Details Rainbow Beach Rainbow Beach 0.48 Rainbow Beach Rainbow Beach 2.25 Scheme Statistics 2009/2010 2010/2011 Population Serviced (Year Round Average) [*3] 1,533 (est.) 2106 Connections[*3] 952 (est.) 916 Annual Water Consumption (ML)] 371 317 Estimated Unaccounted Water (kL)[*1] 40 50.8 Consumption : Allocation 0.51:1 0.43:1 MDMM : Plant Capacity 0.58:1 0.40:1 No of Years Growth at 5% Before Allocation Exceeded 74 26 MAXIMUM DAILY USAGE kL/day 2138 2026 MDMM (MEAN DAILY MAXIMUM MONTH) kL/day 1461 1018 AD kL/day 1016 869 Average Water Consumption (L/EP/Day)[*2] 663[*2] 413 Rainfall(mm) 1,123 2,528 Power Used/kWh 182,233 Chemical Usage 2009/2010 2010/2011 Chemical Used (L) Use per ML Treated (L/ML) Chlorine 3.4 3.3 Soda Ash 138 137.3 Lime 0.06 0 [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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10.2 Schematic: Rainbow Beach Water Treatment Plant

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10.3 Diagram: Distribution and Reticulation Rainbow Beach

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10.4 Table: Infrastructure Details Component Scheme Name Rainbow Beach Sources Type bore field

% of supply 100

Reliability Restricted out takes Water quality issues Nil 5 pressure sealed and concrete Bore field encased bores Sourcing Infrastructure Sub-artesian sand aquifer Depths: 50-65m Sources Carlo Creek Off-take Decommissioned Sources that do not undergo treatment prior to supply No Name Rainbow Beach Process comprises pH Process correction and chlorination Design Capacity (20 hr operation) 2.52ML/d Daily flow range 0.16-2.0ML/d Chemicals added Chlorine, Soda Ash Treatment Plant Dosed pH and Raw Water Standby chemical dosing facilities (Y/N) valves Water sourced from and % 100% exclusive to above % of average day demand provided 100

% of scheme supply distribution area supplied 100 Treatment plant can be Bypasses / Variations bypassed straight to reservoirs Are there any sources that do not undergo disinfection prior to supply? No Location WTP Clearwater Pipeline Type Chlorine Gas Dose rate 3.4L/ML Target residual levels 1.0-3.5mg/L Disinfection Duty/standby Yes Dosing arrangements Fixed Alarms None

Auto shut-off arrangements None Pipe material Asbestos Cement Age range 20-50+ Yrs Approx. % of total length 90% of 29.3km Distribution and Pipe material PVC Reticulation System Age range 0-20 Yrs Approx. % of total length 10% of 29.3km Carlo Point Areas where potential long detention periods EWSQ040 Page 82 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Component Scheme could be expected

Areas where low water pressure (eg < 12 m) could be expected during peak or other Nil demand periods) Reservoir Ground Name Rainbow Beach No.1 Capacity (ML) 0.48 Roofed (Y/N) Yes Vermin-proof (Y/N) Yes Runoff directed off roof (Y/N) Yes

Ground Name Rainbow Beach No.2 Capacity (ML) 2.25 Roofed (Y/N) Yes Vermin-proof (Y/N) Yes Runoff directed off roof (Y/N) Yes N/A Water quality responsibility Upstream location changes Downstream location GRC

10.5 Process Variations

10.5.1 Plant Bypass A plant bypass can be opened between bore field and the reticulation system. The possibility for leakage or unauthorised opening requires a review of the procedural and physical barriers for the Bypass.

10.5.2 Process Step Bypass The sand filter can be bypassed. A review of the procedural and physical barriers for this bypass step is required.

10.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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10.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Raw Raw Raw Raw Raw Variable pH Turbidity Colour Alkalinity Aluminium Iron Manganese [Unit] NTU HU meq/L mg/L mg/L mg/L No. of Samples 820 746 817 47 3 17 17 Maximum 5.40 489 33.0 10.0 0.071 0.140 0.026 Minimum 4.60 0.1 1.0 1.0 0.020 0.001 0.000 Average 5.05 1.2 1.2 2.9 0.044 0.061 0.007 Appendix 1 contains Rainbow Beach Water Scheme Data from 1st January 2010 to 31st March 2012.

10.7 Raw Water Quality Data Interpretation Data is available for the Rainbow Beach Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Rainbow Beach Water Treatment Plant is generally consistent, with operational parameters recorded daily or weekly.

Raw Water Quality Trends (refer to the following Charts): • Turbidity does vary but is fairly low, with an average of 1.2NTU. • pH is generally stable with an average of 4.60. • Colour low and steady, with only occasional peaks up to 20 HU. • Alkalinity is generally low (average of 2.9 meq/L). • Aluminium, Manganese and Iron are consistently low (<0.2 mg/L).

The bore water for Rainbow Beach is supplied from a sand aquifer, resulting in consistent quality raw water.

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

10.7.1 Chart: Rainbow Beach Raw Water Quality (Turbidity, pH, Colour, and Alkalinity)

Raw pH Raw Turbidity Raw Colour Raw Alkalinity

4 pH, Turbidity [NTU], Colour [HU], Alkalinity [meq/L] Alkalinity [HU], Colour [NTU], Turbidity pH,

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10.7.2 Chart: Rainbow Beach Raw Water Quality (Aluminium, Manganese and Iron)

Raw Aluminium Raw Iron Raw Manganese

0.8

0.6 [mg/L]

0.4

0.2

0 1/02/2012 1/03/2012 1/10/2011 1/11/2011 1/12/2011 1/01/2012 1/07/2011 1/08/2011 1/09/2011 1/04/2011 1/05/2011 1/06/2011 1/01/2011 1/02/2011 1/03/2011 1/09/2010 1/10/2010 1/11/2010 1/12/2010 1/06/2010 1/07/2010 1/08/2010 1/03/2010 1/04/2010 1/05/2010 1/01/2010 1/02/2010

10.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

10.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Treated Chlorine Variable pH Alkalinity Turbidity Colour Aluminium Iron Manganese Residual [Unit] meq/L NTU HU mg/L mg/L mg/L mg/L No. of Samples 818 81 747 820 17 17 17 764 Maximum 7.70 240 1 2.0 0.040 0.080 0.016 2.60 Minimum 6.60 74 0.10 1.0 0.002 0.001 0.000 0.70 Average 7.03 168 0.38 1.0 0.023 0.032 0.003 1.53 ADWG Value 6.5 - 8.5 n/a 5 15 0.2 0.3 0.1 5 No. of Excedences 0 n/a 0 0 0 0 0 0 Appendix 1 contains Tin Can Bay / Cooloola Cove Water Scheme Data from 1st January 2010 to 31st March 2012.

10.9 Treated Water Quality Data Interpretation Data is available for the Rainbow Beach Water Treatment Plant for more than 5 years. Council has information available on our database from 1st January 2010 with only some gaps; for example: Alkalinity, Aluminium, Iron and Manganese for 2012, and small gaps in the 2011 Chlorine Residuals.

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The data available for the Rainbow Beach Water Treatment Plant is generally consistent, with operational parameters recorded daily or weekly. Treated Aluminium, Iron and Manganese levels are performed monthly.

Treated Water Quality Trends (refer to the following Charts): • Turbidity is consistently very low (average 0.38 NTU) and well controlled. • pH is well controlled within ADWG guideline values with an average of 7.03. • Colour is well controlled with an average of 1.0 HU. • Alkalinity is trending upwards from 150 meq/L in January 2010 to approximately 200 meq/L in January 2011. This reflects the soda ash added to the process for pH control. • Aluminium, Iron and Manganese in the treated water are consistently very low, averaging <0.04 mg/L. • Chlorine gas is dosed at the outlet of the Rainbow Beach Water Treatment Plant, and is well controlled to an average of 1.53 mg/L across the period shown, currently controlled to just above 1.0 mg/L. The chlorine residual is determined by the reticulation residuals. • Data gaps in January/February 2011 represent periods where access was difficult and the area was impacted by general flooding.

The Rainbow Beach Water Treatment Plant controls the above parameters well, with all values within the ADWG guideline values.

10.9.1 Chart: Rainbow Beach Treated Water Quality (Turbidity, pH, Colour and Alkalinity)

Treated pH Treated Turbidity Treated Colour Treated Alkalinity

8 400

7 350

6 300

5 250

4 200

3 150 Alkalinity [meq/L] pH, Turbidity [NTU], Colour [HU] Colour [NTU], Turbidity pH, 2 100

1 50

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10.9.2 Chart: Rainbow Beach Treated Water Quality (Aluminium, Iron and Manganese)

Treated Aluminium Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

10.9.3 Chart: Rainbow Beach Treated Water Quality (Chlorine Residuals)

3 [mg/L]

10.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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10.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 388 42 42 42 Maximum 2.20 1.80 0.00 0.00 Minimum 0.28 0.10 0.00 0.00 Average 1.34 1.09 ADWG 5 5 0 0 No. of Excedences 0 0 0 0

Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Variable Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 5 5 5 5 5 5 5 5 5 5 Maximum 0.050 0.010 0.020 24 0.7 3 0.010 0.020 0.030 10 Minimum 0.000 0.000 0.000 24 0.5 3 0.000 0.000 0.000 9 Average 0.025 0.005 0.010 24 0.6 3 0.007 0.016 0.015 10 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Turbidity pH Colour Total Total Dissolved Fluoride Variable Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L No. of Samples 5 5 5 5 5 5 Maximum 2 7.66 1.0 10 197 0.10 Minimum 1 7.19 0.0 8 165 0.00 Average 1 7.50 0.8 9 181 0.05 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 No. of Excedences 0 0 0 0 0 0

Appendix 1 contains Rainbow Beach Water Scheme Data from 1st January 2010 to 31st March 2012.

10.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored weekly in multiple locations within the reticulation system with Rainbow Beach. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 42 samples tested in this period. All these results were within ADWG guideline values.

During this period there were 5 samples sent to Queensland Health for full Standard Water Analysis. All variables are within ADWG guidelines. The data shown in Table 10.10.1 is a selection of the data shown in Appendix 1, which

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contains the full Standard Water Analysis data for reticulated water in Rainbow Beach. Disinfection by-products have not been tested for. They are expected to be low due to the low raw water turbidity.

10.11.1 Chart: Rainbow Beach Reticulated Water Quality (Chlorine Residuals)

2.5

1.5 [mg/L]

0.5

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

11 Tin Can Bay / Cooloola Cove Water Scheme Tin Can Bay and Cooloola Cove are small coastal towns in the Cooloola region. They are both served by a single water scheme. The GPS Co-ordinates of the Water Treatment Plant at Cooloola Cove are GPS -26.004069, 152.998481. The Tin Can Bay/Cooloola Cove Quality Plan (WSQ301) provides a process overview description. Chlorine is dosed to allow for contact times /levels that will ensure appropriate maximum levels are supplied to the reticulation system and appropriate minimums are retained in the longest retention areas of the network.

Treatment: Raw water is pumped to the head of the treatment plant into the flash mixer where it is dosed with soda ash to increase pH and alkalinity and alum to form floc. After flash mixing, the flow is split into two parallel systems consisting of clarifier, filter and chemical dosing. As the water enters the clarifier, it is dosed with polymer, the floc settles and is removed to sludge lagoons and clear water is drawn off and filtered through a rapid gravity sand filter. After filtration, the water joins into a common line and is dosed with soda ash for pH correction, chlorine for disinfection and fluoride for medication, all at separate locations along the line, before entering the clear water tank (see figure 11.2). From the clear water tank, the finished water is pumped via clear water pumps into a storage reservoir in Cooloola Cove.

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Reticulation: System floats on three reservoirs which are replenished by pumping when plant is operating. Chlorine is dosed at the plant to ensure a residual exists throughout the network and sample testing is carried out in sections of network determined to be prone to long retention times. Water Quality testing samples are taken from the same locations, as it is likely that these areas present the highest risk to break down of general water quality also.

11.1 Table: Scheme Summary Scheme Name Tin Can Bay/Cooloola Cove Water Supply Scheme Source Teewah Creek Allocation 1950 ML/annum Coagulation, sedimentation, filtration, pH correction, Treatment Process chlorination and fluoridation. Plant Capacity 3,600 kL/day Pump Stations 4 Number 3 91.1 Reservoirs Capacity (ML) 6.32 Zone Location Capacity (ML) Reservoir Cooloola Cove Cooloola Cove 5.0

Details Tin Can Bay LZ Tin Can Bay 1.18 Tin Can Bay HZ Tin Can Bay 0.14 Scheme Statistics 2009/2010 2010/2011 Population Serviced[*3] 5,500 (est.) 6212 Connections[*3] 2500 (est.) 2588 Annual Water Consumption(ML) 510 416 Estimated Unaccounted Water(kL)[*1] 106 143.5 Consumption : Allocation 0.26:1 0.21:1 MDMM : System Capacity 0.52:1 028:1 No of Yrs Growth at 3.8% ‘til Allocation 74 97 MAXIMUM DAILY USAGE kL/day 3185 1643 MDMM (MEAN DAILY MAXIMUM MONTH) 1867 1018 AD kL/day 1398 1141 Average Water Consumption (L/EP/Day) 254[*2] 184 Rainfall(mm) 1,123 1,822 Power Used (kWh) 147,179 Chemical Usage 2009/2010 2010/2011 Chemical Use per ML Treated (L/ML) Alum 94.1 108 Chlorine 3.6 3.6 Polymer 0 0.07 Soda Ash 85.1 89.4 [*1] Total of all unmetered water. [*2] Average water use per equivalent person including unaccounted water and non-residential uses.

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11.2 Schematic: Cooloola Cove Water Treatment Plant

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11.3 Diagram: Distribution and Reticulation Tin Can Bay / Cooloola Cove

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11.4 Table: Infrastructure Details Component Scheme Sources Name Teewah Creek Type Spring fed creek % of supply 100 Reliability Very Reliable

Water quality issues Extremely High Tannin Content & Acidity

Sourcing Pumped from screened pump well at Type (pumped/gravity/equipped bore/etc) Infrastructure creek intake via relay pump station Description Drawn off sandy creek Treatment Plant Tin Can Bay/Cooloola Cove Water Name Treatment Plant Process comprises flocculation, Process clarification, filtration, fluoridation and chlorination Design Capacity (20 hr operation) 3.6ML/d Daily flow range 1-2.4.0ML/d Chemicals added Alum, Polymer, Soda Ash, Chlorine No. Spares and technical staff available Standby chemical dosing facilities (Y/N) to replace faulty equipment within system reserve capacity buffer.

Water sourced from and % 100% exclusive to above

% of average day demand provided 100

% of scheme supply distribution area supplied 100

Bypasses / Variations Dosed pH and Raw Water valves

Are there any sources that do not undergo disinfection prior to supply? No

Disinfection Location Clearwater Pipeline Type Chlorine Gas Dose rate 3.6L/ML Target residual levels 2.0-4.0mg/L Duty/standby Yes Dosing arrangements Fixed Alarms None Auto shut-off arrangements None Distribution and Pipe material Asbestos Cement Reticulation System Age range 10-50+ Yrs Approx. % of total length 90% of 91.9Km Pipe material PVC Age range 0-20 Yrs Approx. % of total length 10% of 91.9Km Areas where potential long detention periods Possible at Norman Point could be expected EWSQ040 Page 93 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Component Scheme Areas where low water pressure (eg < 12 m) could be expected during peak or other demand Possible at Norman Point periods) Reservoirs Ground

Name Cooloola Cove Capacity (ML) 5 Roofed (Y/N) Yes Vermin-proof (Y/N) Yes Runoff directed off roof (Y/N) Yes

Ground

Name Tin Can Bay LZ Capacity (ML) 1.18 Roofed (Y/N) Yes Vermin-proof (Y/N) Yes Runoff directed off roof (Y/N) Yes Elevated Name Tin Can Bay HZ Capacity (ML) 0.14 Roofed (Y/N) Yes Vermin-proof (Y/N) Yes Runoff directed off roof (Y/N) Yes Water quality Upstream location N/A responsibility GRC Downstream location changes

11.5 Process Variations

11.5.1 Plant Bypass There is no complete plant bypass.

11.5.2 Process Step Bypass The major process steps of sedimentation and filtering can be bypassed. The possibility for leakage or unauthorised opening requires a review of the procedural and physical barriers for the Bypass

11.6 Raw Water Quality Data Summary Presented here is a summary of the raw water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

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11.6.1 Table: Raw Water Quality 1/1/10 – 31/3/12 Raw Raw Raw Raw Raw Raw Raw Raw Variable pH Turbidity Colour Alkalinity Hardness Aluminium Manganese Iron [Unit] NTU HU meq/L mg/L mg/L mg/L mg/L No. of Samples 820 752 820 68 2 20 21 21 Maximum 5.30 732 421 52.0 16 0.195 0.340 0.440 Minimum 4.50 0.5 65 0.0 10 0.015 0.009 0.010 Average 4.96 2.8 215 3.2 13 0.097 0.048 0.167 Appendix 1 contains Tin Can Bay / Cooloola Cove Water Scheme Data from 1st January 2010 to 31st March 2012.

11.7 Raw Water Quality Data Interpretation Data is available for the Cooloola Cove Water Treatment Plant for more than 5 years. Council has information available on our database consistently from 1st January 2010.

The data available for the Cooloola Cove Water Treatment Plant is generally consistent, with operational parameters recorded daily or weekly.

Raw Water Quality Trends (refer to the following Charts): • Turbidity does vary but is fairly low, with an average of 2.8NTU. • pH is generally stable with an average of 4.96. • Colour is high and variable, with a range of 65 – 421 HU, averaging 215 HU. Generally, the colour is higher (>5 HU) during January to May. • Alkalinity is generally stable within a very low range (average of 3.2 meq/L), with a history of spikes (maximum >50 meq/L). • Aluminium, Manganese and Iron have consistently low (<0.4 mg/L).

Metals, radioactive elements and pesticides in Raw Water were all tested for during the SNAP testing regime. These results are presented in Appendix 1. The parameters were all within AWDG values.

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11.7.1 Chart: Cooloola Cove Raw Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness)

Raw pH Raw Turbidity Raw Alkalinity Raw Colour Raw Hardness

10 500

9 450

8 400

7 350

6 300

5 250

4 200

3 150 [HU] Colour [mg/L], Hardness pH, Turbidity [NTU], Alkalinity [meq/L] Alkalinity [NTU], Turbidity pH, 2 100

1 50

11.7.2 Chart: Cooloola Cove Raw Water Quality (Aluminium, Manganese and Iron)

Raw Aluminium Raw Manganese Raw Iron

0.8

0.6 [mg/L]

0.4

0.2

11.8 Treated Water Quality Data Summary Presented here is a summary of the treated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records

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Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

11.8.1 Table: Treated Water Quality 1/1/10 – 31/3/12 Treated Treated Treated Treated Treated Treated Treated Treated Chlorine Variable pH Alkalinity Turbidity Colour Fluoride Aluminium Iron Manganese Residual [Unit] meq/L NTU HU mg/L mg/L mg/L mg/L mg/L No. of Samples 819 94 773 820 90 21 21 20 789 Maximum 8.40 83.0 1.0 4.0 0.88 0.166 0.040 0.014 3.30 Minimum 6.60 20.0 0.0 1.0 0.70 0.002 0.000 0.000 1.90 Average 7.13 53.8 0.1 1.0 0.79 0.062 0.015 0.003 2.55 ADWG Value 6.5 - 8.5 n/a 5 15 1.5 0.2 0.3 0.1 5 No. of Excedences 0 n/a 0 0 0 0 0 0 0 Appendix 1 contains Tin Can Bay / Cooloola Cove Water Scheme Data from 1st January 2010 to 31st March 2012.

11.9 Treated Water Quality Data Interpretation Data is available for the Cooloola Cove Water Treatment Plant for more than 5 years. Council has information available on our database from 1st January 2010.

The data available for the Cooloola Cove Water Treatment Plant is generally consistent, with operational parameters recorded daily or weekly. Treated Aluminium, Iron and Manganese levels are performed monthly.

Treated Water Quality Trends (refer to the following Charts): • Turbidity is consistently very low (average 0.1 NTU) and well controlled. • pH is well controlled within ADWG guideline values with an average of 7.13. • Colour is well controlled with an average of 1.0 HU. • Alkalinity is trending upwards from a low of 50 meq/L in July 2010 to 70 meq/L in March 2012. It is modified in the process as a result of pH correction using soda ash. • Fluoride was introduced in January 2012 and is well controlled to an average of 0.79 mg/L. • Aluminium, Iron and Manganese in the treated water are consistently very low, trending down from 2010 to very low levels in 2011 and 2012. • Chlorine gas is dosed at the outlet of the Cooloola Cove Water Treatment Plant, and is well controlled to an average of 2.55 mg/L. The chlorine residual is determined by the reticulation residuals. • Data gaps in January/February 2011 represent periods where access was difficult and the area was impacted by general flooding.

The Cooloola Cove Water Treatment Plant controls the above parameters well, with all values within the ADWG guideline values.

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11.9.1 Chart: Cooloola Cove Treated Water Quality (Turbidity, pH, Colour, Alkalinity and Hardness)

Treated pH Treated Turbidity Treated Colour Treated Fluoride Treated Alkalinity

9 90

8 80

7 70

6 60

5 50

4 40 Alkalinity [meq/L]

3 30

2 20 pH, Turbidity [NTU], Colour [HU], Fluoride [mg/L] Fluoride [HU], Colour [NTU], Turbidity pH,

1 10

11.9.2 Chart: Cooloola Cove Treated Water Quality (Aluminium, Iron and Manganese)

Treated Aluminium Treated Iron Treated Manganese

0.5

0.4

0.3 [mg/L]

0.2

0.1

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11.9.3 Chart: Cooloola Cove Treated Water Quality (Chlorine Residuals)

3 [mg/L]

11.10 Reticulated Water Quality Data Summary Presented here is a summary of the reticulated water quality data from 1 January 2010 to 31 March 2012. Hardcopy records for all the parameters shown here are stored at the Treatment Plant or archived with Councils Records Department. Forms for the recording of variables are controlled as part of Councils document quality management system.

11.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Chlorine Chlorine Coliform e. Coli Residual - Residual - Count Count Variable Operator Council Unit mg/L mg/L MPN MPN No. of Samples 671 51 53 53 Maximum 5.60 2.90 0.00 0.00 Minimum 0.10 0.01 0.00 0.00 Average 1.29 1.10 ADWG 5 5 0 0 No. of Excedences 3 0 0 0

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Dissolved Dissolved Dissolved Chloride Nitrate Sulphate Zinc Boron Copper Silica Variable Aluminium Manganese Iron Ions Ions Ions Unit mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L No. of Samples 4 4 4 4 4 4 4 4 4 4 Maximum 0.060 0.009 0.030 25 0.5 86 0.020 0.020 0.029 6 Minimum 0.025 0.000 0.009 15 0.0 28 0.000 0.000 0.000 4 Average 0.046 0.004 0.015 21 0.2 54 0.008 0.010 0.011 5 ADWG Value 0.200 0.100 0.300 250 50 250 3 4 1 80 No. of Excedences 0 0 0 0 0 0 0 0 0 0

Turbidity pH Colour Total Total Dissolved Fluoride Variable Hardness Solids Ions [Unit] NTU HU mg/L mg/L mg/L No. of Samples 4 4 4 4 4 8 Maximum 1 7.84 12.0 13 206 0.85 Minimum 0 7.21 1.0 5.8 106 0.00 Average 1 7.59 6.8 10 158 0.59 ADWG Value 5 6.5 - 8.5 15 200 600 1.50 No. of Excedences 0 0 0 0 0 0 Appendix 1 contains Tin Can Bay / Cooloola Cove Water Scheme Data from 1st January 2010 to 31st March 2012.

11.11 Reticulated Water Quality Data Interpretation Chlorine residuals are monitored weekly in multiple locations within the reticulation system with Tin Can Bay and Cooloola Cove. These are shown in the above table as ‘Chlorine Residual – Operator’. Independent to the operator tests, Community Health Services also conducts chlorine residual tests at various locations within the reticulation system, which is shown as ‘Chlorine Residual – Council’. These samples are then sent for Coliform and e-Coli tests by Queensland Health. There are 53 samples tested in this period.

All these results were within ADWG guideline values, except for 3 chlorine residual readings in November 2011. This was a short-term excursion that was brought under control. The low residual levels recorded in the reticulation systems around the same time indicate an abnormality in the system, such as line scouring. These have since been brought under excellent control with all values <3 mg/L in 2011 and 2012.

During this period there were 4 samples sent to Queensland Health for full Standard Water Analysis. All variables are within ADWG guidelines. The data shown in Table 11.10.1 is a selection of the data shown in Appendix 1, which contains the full Standard Water Analysis data for reticulated water in Cooloola Cove / Tin Can Bay. Disinfection by- products have not been tested. They are expected to be low due to the low raw water turbidity.

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11.11.1 Chart: Cooloola Cove / Tin Can Bay Reticulated Water Quality (Chlorine Residuals)

3 [mg/L]

0 31/12/2009 10/04/2010 19/07/2010 27/10/2010 4/02/2011 15/05/2011 23/08/2011 1/12/2011 10/03/2012

12 Water Quality Complaints The quality of water is generally satisfactory. While in some years the number of Water Quality Incidents was high, the number of affected people was low. In almost all cases, discolouration of water resulted from sediment disturbance caused by the initial flushing of mains which had not experienced flushing velocities for a number of years.

Table 12.1 summarises the Water Quality Complaints for all Schemes against the Target from Councils Customer Service Standards.

12.1 Table: Water Quality Complaints for all Schemes Performance Performance Indicator Target FY 2010 FY 2011 Measure FY 2009 Drinking water quality (physical and chemical % compliance >98% 100% 99.9% 99.8% parameters) Number/1000

Drinking water complaints connections/ 1.4 1.8 4.3 <10 year Number/ Drinking water quality incidents/ <10 17 22 54 complaints year

In 2010 most complaints were in response to the 1 incident which was a result of the need to divert the main pumping route for bridge works after damage to Normanby Bridge.

In 2011, availability of water supplies has allowed mains flushing programs to be continued. Resultant higher chlorine residuals in many areas led to complaints. Discolouration of water resulted from sediment disturbance

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caused by the flushing of mains which had not experienced regular flushing velocities for a number of years. A change in operation of one scheme resulted in complaints until the issue was resolved by cleaning the main.

Table 12.2 summarises the Water Quality Complaints received from 1st January 2010 to 31st March 2012.

When water quality complaints are received by council, they are generally checked with the water treatment plant operators for unusual raw water conditions or possible process upsets. If the complaint is unusual, samples are collected from the area, often at more than one location. If flushing and scouring the mains in a cul-de-sac or low flow area, mains are flushed at multiple points to ensure a thorough clean. Mains are always flushed with water until it runs clear (usually more than 30 minutes) to ensure any localised problems are resolved.

Each complaint is captured on a ‘Job Sheet’, WSF001, to track the progress of the investigation, and recorded on the CRM system.

12.2 Table: Summary of Water Quality Complaints for all Schemes 1/1/10 – 31/3/12 Main Reasons for Resolution of Problem Scheme Year Complaints Cause / Likely Source Line requires flushing, after 2011 mains work or because of Flush and scour mains. Discoloured water deposit/build ups. Seasonal raw water quality Flush and scour mains. not being removed during Goomeri Odour treatment Review treatment processes to optimise for 2012 Odour Scoured water main. odour removal. Tested for Chlorine, within limits. Seasonal raw water 2010 quality or mains Water tastes like chlorine. deposit/build up. Flush and scour mains Work on mains, or deposit / until water is clear. Discoloured water build up in mains. Dirty Water Red slime in tap water Appears to be internal, investigated around mains etc. Gympie Dirty Water

Milky water

Cloudy water and brownish

colour

Flush and scour mains Water is running cloudy until water is clear. Discoloured water Work on mains, or deposit /

Dirty and smelly water build up in mains Occasionally ran garden Brown water tap to clear, suggested to 2011 Dirty Water - stained Council scouring program same with internal taps. washing stirred up customers supply Badly discoloured water (end of line after scour point) Tested for Chlorine, within limits. Seasonal raw water quality or mains Water tastes like chlorine. deposit/build up. Water (quality) taste and Seasonal raw water quality Flush and scour mains. smell. not being removed during Poor taste treatment Review treatment water taste processes to optimise for

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Main Reasons for Resolution of Problem Scheme Year Complaints Cause / Likely Source Work on mains, or deposit / odour removal Dirty water, cloudy build up in mains Dirty Water Internal Galvanised pipe feeding bath Dirty Water Flush and scour mains Dirty water - yellowish in until water is clear. 2012 colour Work on mains, or deposit / Gympie Water tastes like chlorine. build up in mains Water brown and smelly Pumping during the day Flush and scour mains. through reticulation system. Checked free chlorine, within Review treatment ADWG. processes to optimise for Imbil Water taste and odour, odour removal. 2010 chlorine. Possible source water seasonal issues, or degraded Review storage of sodium sodium hypochlorite in hypochlorite. storage. Work on mains, or deposit / Dirty water build up in mains Work on mains, or deposit / Flush and scour mains. Imbil 2011 Dirty Water build up in mains Pumping during the day Flush and scour mains. through reticulation system. Checked free chlorine, within Review treatment ADWG. processes to optimise for Imbil 2012 Strong chlorine odour odour removal. Possible source water seasonal issues, or degraded Review storage of sodium sodium hypochlorite in hypochlorite. storage. Sampled at residence, no evidence found. No smell or odour. No other complaints. Possible low usage internally Imbil 2012 Oily film on top of water (rarely home). Flush and scour mains until water is clear. Kandanga 2012 Dirty smelly water. Work on mains, or deposit / build up in mains. Ran internal garden tap to clear, suggested to same Sample taken was clear. with internal taps. Kilkivan 2010 Discoloured water. Found to be deposits in Flush and scour mains Black specks in water mains and service water lines. until water is clear. 2011 Algal build up. Kilkivan Ran internal garden tap to Work on mains, or deposit / clear, suggested to same Dirty Water build up in mains. with internal taps. Work on mains, or deposit / Flush and scour mains Rainbow Beach 2010 Cloudy-milky water build up in mains. Flush and scour mains Rainbow Beach 2011 Black particles in water Iron-related scale in pipes.

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Main Reasons for Resolution of Problem Scheme Year Complaints Cause / Likely Source Tin Can Bay / Cooloola Cove 2011 Black spots in water Iron-related scale in pipes. Flush and scour mains.

13 Catchment Characteristics

13.1 Mary River Catchment The Mary River Catchment encompasses the water supply for Imbil, Kandanga, Amamoor and Gympie Schemes. The following data also has information for the Kilkivan Wide Bay Creek, which is the source water for the Kilkivan Off- stream Storage, and Kimbombi Creek, which is the source for the Goomeri Off-stream Storage.

The Mary River Catchment Coordinating Committee (mrccc.org.au) has performed assessments of the geography, soil type, vegetation, land use and mining in the catchment. The full catchment extends all the way to Maryborough, which is shown in the following maps.

The maps show the major localities (labelled as Map 1), land use (Map 6), areas of cropping and irrigation (Map 7), annual rainfall (Map 8), the network of streams, creeks, rivers and dams (Map 9), topography (Map 13), existing mineral and mining leases (Map 15) and soil landscapes (Map 16) within the Mary River Catchment.

Map 1 (Localities) and Map 9 (Streams and Dams) shows Amamoor Creek and Kandanga Creek are tributaries to the Mary River. It identifies the Borumba Dam location, and how it provides water to Gympie via Yabba Creek, which is the source water for Imbil. Amamoor, Kandanga and Imbil have some variation in raw water quality and are affected differently by rainfall events and runoff (refer to Average Annual Rainfall, Map 8). Water in the Mary River at Gympie is a combination of all these sources, plus many others, and has much more variability as a result.

Kilkivan takes water for the Off-stream Storage from Wide Bay Creek, and Goomeri Off-stream Storage is from Kimbombi Creek (Map 9, Streams and Dams). Both of these sources share land use (Maps 6 and 7), rainfall (Map 8) and topography (Map 13), and so share similar quality characteristics. Kimbombi Creek has a much smaller catchment, so the variability in quality is related to localised rainfall events. Wide Bay Creek is fed from several creeks by the time it reaches the off take for Kilkivan Off-stream Storage.

Map 15 shows existing Mineral and Mining leases, which are most notably around the Kilkivan area. It is important to also consider previous mining activities in the area, such as the copper mine at Cinnabar. Some trace metals such as Arsenic and Mercury will be as a result of previous activity in the area.

Following: 13.1.1 Map 1: Locality 13.1.2 Map 6: Land Use 13.1.3 Map 7: Disturbance 13.1.4 Map 8: Annual Rainfall 13.1.5 Map 9: Streams and Dams 13.1.6 Map 13: Elevation 13.1.7 Map 15: Mineral and Mining 13.1.8 Map 16: Soil Landscapes

The catchment is also prone to regular flood events, as shown in 13.1.9, Historical Gympie Flood Peaks (Bureau of Meteorology, www.bom.gov.au)

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13.1.1 Map 1: Locality

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13.1.2 Map 6: Land Use

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13.1.3 Map 7: Disturbance

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13.1.4 Map 8: Annual Rainfall

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13.1.5 Map 9: Streams and Dams

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13.1.6 Map 13: Elevation

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13.1.7 Map 15: Mineral and Mining

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13.1.8 Map 16: Soil Landscapes

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13.1.9 Figure: Historical Gympie Flood Peaks (www.bom.gov.au)

13.2 Cooloola Sand-mass Sub-artesian Area The raw water source for the Tin Can Bay / Cooloola Cove and the Rainbow Beach Schemes is the Cooloola Sand- mass Sub-artesian area.

From the Water Resource (Mary Basin) Plan 2006 the details of the location of this area are shown in the following Diagram 13.2.1.

The Draft Cooloola /Teewah Sand-mass Report (Groundwater Review of South East Queensland On-Shore Sand-mass System and Sand Islands, prepared by Environmental Hydrology Associates (EHA Pty Ltd) for the Queensland Department of Natural Resources & Mines, 2006) presents a topography diagram of the area. This is shown in Diagram 13.2.2.

Diagram 13.2.2 shows the location of Teewah Creek and the Extraction Point (shown here as the CRC Teewah Ck Extraction Point) for the Cooloola Cove Water Treatment Plant. The production and monitoring bores for the Rainbow Beach Water Treatment Plant source water are marked on Diagram 13.2.3.

This Draft Cooloola-Teewah Sand-mass Report also presents the following information on the Sand-mass Sub- artesian Area: • Area 24,000 ha; • Mean rainfall 1,528 mm/a; • Recharge 450 mm/a; • Volume of storage 7.5 x 109 m3 (7,500,000 ML); • Elevation of water table 50 m; • Theoretical lateral flow assuming no losses other than evapotranspiration = recharge = • 300,000 m3/d (300 ML/d) • Measured lateral flow from major streams excluding flows from coastal seepages and springs = 120,000 m3/d (120 ML/d)

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• Surface water discharge to the coast via shallow coastal streams that drain a combination of perched and regional groundwater systems mostly via major coastal wetlands (e.g. Cameron Creek, Seary’s Creek, Cooloola Creek, Freshwater Creek, and little Freshwater Creek); • Surface discharge to a major river (Noosa River) via minor and major spring fed tributaries such as Teewah Creek and Franki’s Gulch; • There are a series of significant watercourses that drain the sand mass as follows: o Cameron Creek, Seary's Creek, Cooloola Creek which drain to Tin Can Bay; o Teewah Creek, Franki's Gulch, and numerous small unnamed creeks that drain to the Noosa River; and o Freshwater Creek and Little freshwater Creek that drain to Teewah Beach (eastern coastline). The stream flow of all of these watercourses has some groundwater component over some of their courses and this includes discharge from both perched groundwater systems and regional groundwater systems.

Following: 13.2.1 Diagram: Schedule 2, Cooloola Sand-mass Sub-artesian area, Water Resource (Mary Basin) Plan 2006 13.2.2 Diagram: Figure 1, TOPOGRAPHY, Draft Cooloola – Teewah Sand-mass Report 13.2.3 Diagram: Location of Production and Monitoring Bores for Rainbow Beach.

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13.2.1 Diagram: Schedule 2, Cooloola Sand-mass Sub-artesian area, Water Resource (Mary Basin) Plan 2006

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13.2.2 Diagram: Figure 1, TOPOGRAPHY, Draft Cooloola – Teewah Sand-mass Report

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13.2.3 Diagram: Location of Production and Monitoring Bores for Rainbow Beach.

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14 Hazard Identification and Assessment of Risks

14.1 Key Stakeholders

A workshop was conducted on 15 May 2012 with key stakeholders.

14.1.1 Table 4.1 Stakeholders - Risk Assessment

Stakeholder Rationale for engagement and how engagement occurred SEQWater Responsible for managing water quality in the source water Borumba Dam Operator. Council requested catchment water quality information and management strategy for the risk assessment but there was no response from SEQWater General Manager Responsible for managing the water treatment and supply for all of Water & Sewerage Branch Council. [Ian Schiefelbein] Manager- Treatment & Responsible for document control and for technical support to and Compliance reporting for all water treatment facilities for Council. Water & Sewerage Branch [Shaun Johnston] Operations Manager Responsible for reticulation and technical support for drinking water Water & Sewerage Section within Council. [Darren Beutel] Assistant General Manager Responsible for asset and project management of all water treatment Water & Sewerage Branch and reticulation assets within council. [Jason Kane] Treatment Plant Superintendent Responsible for leak detection in the reticulation system and and Trade Waste Officer operations at all Water Treatment Plants Water & Sewerage Branch [Ross Gibbs] Foreman Responsible for maintenance and project work on water treatment Water & Sewerage Section facilities and reticulation. [Dave Stonier] Project Co-ordinator Responsible for maintenance and project work on water reticulation Water & Sewerage Section assets. [Tony Balkin] Operators-In-Charge Responsible for the operations of the water treatment facilities within Water & Sewerage Branch Council. Cooloola Coast [Dean Long] Goomeri & Kilkivan [Colin Ford] Gympie [Keith Oliver] Mary Valley [Greg Waugh] Maintenance Fitter Responsible for maintenance of water treatment facilities. Water & Sewerage Branch [Brad Hawkesford]

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14.2 Assessment of Risks

14.2.1 Methodology The methodology adopted for the risk assessment must was the risk assessment framework presented in the Australian Drinking Water Guidelines methodology.

Acceptable risk levels are defined in Table 14.2.2, using the definitions shown in the following Tables 14.2.2, 3, 4, 5 and 6.

Table 14.2.7 presents the Identified Hazards and Maximum Risk Assessment for Council. These were determined at the Risk Assessment Workshop.

14.2.2 Table: Defined Acceptable Risk Levels Low risk (acceptable) Manage for continuous improvement Moderate risk (unacceptable) Implement short-term measures. Longer- term risk reduction measures may be implemented within a reasonable timeframe. High risk (unacceptable) Implement short-term measures immediately. Longer term risk reduction measures need to be a priority Very high (unacceptable) Implement short-term measures immediately. Implementation of longer

term risk reduction measures given highest

priority

14.2.3 Table: Likelihood Definitions for determining Risk Levels Likelihood Descriptors

Rare Occurs less than or equal to once every 2 years

Occurs less than once per year and more often than once every 2 Unlikely years

Occurs more often than once per year and up to once a month Possible (12/yr)

Occurs more often than once per month (12/yr) and up to once per Likely week (52/yr)

Almost Certain Occurs more often than once per week (52/yr)

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14.2.4 Table: Consequence Definitions for determining Risk Levels Consequence Descriptors Isolated excedence of aesthetic parameter with little or no Insignificant disruption to normal operation Potential local aesthetic, isolated excedence of chronic health Minor parameter Potential widespread aesthetic impact or repeated breach of Moderate chronic health parameter

Major Potential acute health impact, no declared outbreak expected

Catastrophic Potential acute health impact, declared outbreak expected

14.2.5 Table: Likelihood vs. Consequence Table used for determining Risk Levels Consequence Likelihood Insignificant Minor Moderate Major Catastrophic 20 - Almost certain 6 - Medium 10 - High 15 - High 25 - Extreme Extreme

Likely 5 - Medium 8 - Medium 12 - High 16 - High 20 - Extreme

Possible 3 - Low 6 - Medium 9 - Medium 12 - High 15 - High

Unlikely 2 - Low 4 - Low 6 - Medium 8 - Medium 10 - High

Rare 1 - Low 2 - Low 3 - Low 5 - Medium 6 - Medium

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14.2.6 Table: Level of Uncertainty Definition Level of Uncertainty Definition There is 2 years of continuous daily monitoring data, which has been Certain trended and assessed, or: The processes involved are thoroughly understood.

There is 2 years of continuous weekly monitoring data, which has been Confident collated and assessed, or for the duration of seasonal events; or: There is a good understanding of the processes involved.

There is at least a year (or seasonal duration) of continuous monitoring data Reliable available, which has been assessed; or There is reasonable understanding of the processes involved.

There is limited monitoring data available; or Estimate There is limited understanding of the processes involved.

There is limited or no monitoring data available; or Uncertain The processes are not well understood.

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14.2.7 Table: Hazard Identification and Maximum Risk Assessment for Whole of Council

Conse- Likeli- Maximum Uncert- ID# Treatment Phase Hazard Source Comments quence hood Risk ainty Assume that there is always Bacteria is in the source water. Cattle can access the river, it’s almost certain Wastewater treatment plants the they contaminate the water with Septic tanks in catchment Bacteria (E. Almost 25 - bacteria. Other animals may also 1 Source Stock & Wildlife Catastrophic Certain Coli, etc) Certain Extreme contaminate water. Animal Contamination of Reservoirs /Plants A number of townships within the Bypass catchments are not sewered. System of monitoring septic systems cannot be relied upon. Assume that there is always Bacteria is in the source water. Cattle can access the river, its almost certain Wastewater treatment plants the they contaminate the water with Septic tanks in catchment 20 - bacteria. Other animals may also 2 Source Viruses Stock & Wildlife Catastrophic Likely Certain Extreme contaminate water. Animal Contamination of Reservoirs /Plants A number of townships within the Bypass catchments are not sewered. System of monitoring septic systems cannot be relied upon. Assume that there is always Bacteria is in the source water. Wastewater treatment plants Cattle can access the river, its almost certain Septic tanks in catchment the they contaminate the water with Stock & Wildlife 20 - bacteria. Other animals may also 3 Source Protozoa Catastrophic Likely Certain Animal Contamination of Reservoirs /Plants Extreme contaminate water. Bypass A number of townships within the Recycled water from sludge extraction process catchments are not sewered. System of monitoring septic systems cannot be relied upon.

Reticulation Repairs Assume contamination possible at any 4 Reticulation & Storage Viruses Backflow Catastrophic Possible 15 - High Confident worksite and from any customer source Infection of Reservoirs

Reticulation Repairs Assume contamination possible at any 5 Reticulation & Storage Protozoa Backflow Catastrophic Possible 15 - High Confident worksite and from any customer source Infection of Reservoirs

Reticulation Repairs Bacteria (E. Assume contamination possible at any 6 Reticulation & Storage Backflow Catastrophic Possible 15 - High Confident Coli, etc) worksite and from any customer source Infection of Reservoirs

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Conse- Likeli- Maximum Uncert- ID# Treatment Phase Hazard Source Comments quence hood Risk ainty Runoff Disturbances from animals and machinery, events (eg. Country Music Muster) Construction (grader, main roads) 7 Source Turbidity Moderate Likely 12 - High Some plants have very low likelihood Confident Burn offs / fire fighting Dam turnover (seasonal) Bypass Recycled water from sludge extraction process Organic Runoff Surface water sources are likely. Bores with 8 Source Matter - Moderate Likely 12 - High Confident Seasonal (including dam turnover) tannins. Suspended

pH outside Natural (too low from RB bores) Loss of effective chlorination when pH is too 9 Source the Seasonal Moderate Likely 12 - High high Certain guidelines Chemical Additives Coagulation not effective

Aluminium Copper Zinc SNAP test results show some issues 10 Source Metals Lead Moderate Likely 12 - High Confident Metals monitored regularly Mercury Cadmium Others

Operational Untrained or inexperienced operators, fitters or Training and procedure based response 11 All Major Possible 12 - High Certain Errors network staff making operational errors employed

Chlorate , Bromate , Fluoride, 12 Source Anions Sulphate , Nitrate Moderate Likely 12 - High Monitored regularly Confident Others Fertilizers (cropping) Goomeri off stream, Kilkivan and Amamoor Septic systems / STPs 9 - 13 Source Arsenic Moderate Possible had some levels, Imbil, Kandanga > 10% of Reliable Mining Activities Medium limit. Old Cattle Dips Plant Bypasses 9 - Plant bypasses are in place for all plants. 14 Treatment Treatment bypassed Moderate Possible Certain Recycling Medium Procedures prevent usage now. decant water Most systems are self-controlled, only returning operational information to the server via telemetry (for example, river Failure of communications between assets, server & pumps). operators Operational Black Specks have been found in the water Deterioration of reticulation equipment causing 9 - 15 All Control Moderate Possible from deteriorating flexi couplings. Estimate quality issues. Medium Failure Rubber deteriorates in time. Unlined fittings Some unlined fittings deteriorating Calibrations not carried out or in error (anecdotal evidence) All systems have multiple online and testing equipment that require regular calibrations.

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Conse- Likeli- Maximum Uncert- ID# Treatment Phase Hazard Source Comments quence hood Risk ainty Disinfection Disinfection in Reticulation System has no online 9 - Sodium Hypochlorite is dosed at some 16 Treatment & Storage Moderate Possible Confident overdosing monitoring. Medium reservoirs to maintain disinfection residual

Aged infrastructure 9 - With mains pressure, it is unlikely to have 17 Reticulation Mains failure Moderate Possible Confident Accidental damage Medium hazards enter against the flow of water.

Total Hardness 9 - 18 Source Dissolved Moderate Possible Limited impact on most networks Reliable Salinity Medium Solids Ozone Chlorine gas Treatment Sodium hypochlorite Possible hazards in treated water, but not chemicals Polyelectrolytes 9 - 19 Treatment Moderate Possible present in raw water. Dosed as part of the Confident wrongly Soda ash Medium treatment process dosed Aluminium Sulphate Fluoride Brine Standard method is to flush bore system to clean. It, recirculate it for one day, sit Cleaning Bore chemical treatment 9 - overnight, flush next day. Bore is isolated 20 Source & Reticulation chemicals, Moderate Possible Confident Pipe repair disinfection Medium from the system via a valve, Bores system is flushed before bringing bore back online. Possible hazards in treated water especially Disinfection hypochlorite dosing, but not present in raw By-products 9 - 21 Treatment & Reticulation Prechlorination, THM's Moderate Possible water. Estimate (including Medium High risk areas are low flow points in Chlorates) reticulation system. Seasonal events are evident from the water quality data. These occur in dam turnover at Runoff 8 - Borumba, flooding, significant rainfall, low 22 Source Manganese Groundwater / soil Minor Likely Confident Medium rainfall. Old mines There are so many possible causes that it is not always clear. Seasonal events are evident from the water Soil Make-up quality data. These occur in dam turnover, Runoff Almost 6 - 23 Source Iron Insignificant flooding, significant rainfall, low rainfall. Confident Lake stratification Certain Medium There are so many possible causes that it is Lake roll over not always clear. No barrier as the nature of the contaminant Harmful is unknown. Treatment, Reticulation & substances 6 - 24 Accidental or intentional contamination Catastrophic Rare The consequence could definitely be Confident Storage (not Medium catastrophic and this has not occurred in identified) the past and therefore is a rare event. No barrier as the nature of the contaminant Harmful is unknown. substances 6 - 25 Source Accidental or intentional contamination Catastrophic Rare The consequence could definitely be Confident (not Medium catastrophic and this has not occurred in identified) the past and therefore is a rare event.

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Conse- Likeli- Maximum Uncert- ID# Treatment Phase Hazard Source Comments quence hood Risk ainty Pipeline construction/ repair 6 - 26 Reticulation & Storage Turbidity Minor Possible Some plants have very low likelihood Confident Reservoir turnover Medium

Growth of bacteria in the bore, can occur in 6 - May occur in bore holes where iron content 27 Source Iron Bacteria Minor Possible Confident reticulation system Medium in source water is higher. No long-term monitoring data available. The catchment includes cattle - there are Agricultural runoff / forestry old stock dips - but no cropping or Spraying of aquatic weeds 28 Source Pesticides Minor Unlikely 4 - Low intensive agriculture (only forestry). No Estimate Accidental / deliberate spills expected pesticide issues but is uncertain. Old cattle dips Pesticide testing has shown v low or no levels. Fertilizers (cropping) 29 Source Nitrate Septic systems / STPs Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident Fecal Contamination May build up in retic system. Old pipelines Growth of bacteria in the bore, can occur in may still have some iron bacteria building 30 Reticulation Iron Bacteria Minor Unlikely 4 - Low Confident reticulation system up in the line and services. Small service lines may be air scoured. Contamination All contaminated water would go through treatment 31 Source through Bore As for other contamination Moderate Rare 3 - Low Reliable normally Head

Most catchments do not include danger 32 Source Cyanotoxins Toxic algal blooms Moderate Rare 3 - Low Confident zones for algae blooms

Anecdotally there has been very minor issues. JHWTP has had rare fuel odours, Fuel tanks in the catchment 33 Source Hydrocarbons Moderate Rare 3 - Low plant shut down if any suspected Confident Service stations contamination. No major storages in the catchment. Fluoride detected about 0.1 mg/L in raw water for Gympie, nowhere near the health 34 Source Fluoride Geology Insignificant Rare 1 - Low limit of 1.5mg/L. Has been tested for in Certain other systems. Highest snapshot test was Goomeri at 0.2mg/L.

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14.3 Risk Management Measures Each scheme was assessed using the methodology described above. The following tables present the results of the Risk Assessment Workshop for each Scheme.

14.3.1 Table: All Existing and Proposed Council Wide Preventative Measures.

ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk Assume that there is always Bacteria is in the source water. Treatment processes sufficient to Wastewater treatment Treatment as detailed for each Cattle can access the river, its almost protect customers plants plant. certain the they contaminate the water Cannot lower an initial Septic tanks in catchment Disinfection (chlorination) in all Bacteria (E. Almost 25 - with bacteria. Other animals may also "catastrophic" consequence to any 1 Source Stock & Wildlife Catastrophic Certain plants Coli, etc) Certain Extreme contaminate water. lower than "medium" level residual Animal Contamination of Roofed reservoirs A number of townships within the risk. Reservoirs /Plants Procedures in place to protect from catchments are not sewered. System of Continued monitoring and Bypass bypass events monitoring septic systems cannot be 6 - systems improvement required. relied upon. Catastrophic Rare Medium Assume that there is always Bacteria is in the source water. Wastewater treatment Treatment as detailed for each Treatment processes sufficient to Cattle can access the river, its almost plants plant. protect customers certain the they contaminate the water Septic tanks in catchment Disinfection (chlorination) in all Cannot lower an initial 20 - with bacteria. Other animals may also 2 Source Viruses Stock & Wildlife Catastrophic Likely Certain plants "catastrophic" consequence to any Extreme contaminate water. Animal Contamination of Roofed reservoirs lower than "medium" level residual A number of townships within the Reservoirs /Plants Procedures in place to protect from risk. catchments are not sewered. System of Bypass bypass events Continued monitoring required. monitoring septic systems cannot be 6 - relied upon. Catastrophic Rare Medium Assume that there is always Bacteria is in Wastewater treatment the source water. Treatment processes sufficient to plants Cattle can access the river, it’s almost protect customers Septic tanks in catchment certain the they contaminate the water Treatment as detailed for each Cannot lower an initial Stock & Wildlife 20 - with bacteria. Other animals may also plant. "catastrophic" consequence to any 3 Source Protozoa Animal Contamination of Catastrophic Likely Certain Extreme contaminate water. Procedures in place to protect from lower than "medium" level residual Reservoirs /Plants A number of townships within the bypass events risk. Bypass catchments are not sewered. Continued monitoring and Recycled water from System of monitoring septic systems 6 - systems improvement required. sludge extraction process cannot be relied upon. Catastrophic Rare Medium Processes sufficient to protect Reticulation repair procedures (eg. customers flushing used, don't cross sewage Cannot lower an initial Reticulation Repairs Reticulation Assume contamination possible at any and water equipment). "catastrophic" consequence to any 4 Viruses Backflow Catastrophic Possible 15 - High Confident & Storage worksite and from any customer source Backflow prevention devices lower than "medium" level residual Infection of Reservoirs mandated risk. Roofed and sealed reservoirs 6 - Continued monitoring and Catastrophic Rare Medium systems improvement required. Processes sufficient to protect Reticulation repair procedures (eg. customers flushing used, don't cross sewage Cannot lower an initial Reticulation Repairs Reticulation Assume contamination possible at any and water equipment) "catastrophic" consequence to any 5 Protozoa Backflow Catastrophic Possible 15 - High Confident & Storage worksite and from any customer source Backflow prevention devices lower than "medium" level residual Infection of Reservoirs mandated risk. Roofed and sealed reservoirs 6 - Continued monitoring and Catastrophic Rare Medium systems improvement required.

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ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk Processes sufficient to protect Reticulation repair procedures (eg. customers flushing used, don't cross sewage Cannot lower an initial Reticulation Repairs Reticulation Bacteria (E. Assume contamination possible at any and water equipment) "catastrophic" consequence to any 6 Backflow Catastrophic Possible 15 - High Confident & Storage Coli, etc) worksite and from any customer source Backflow prevention devices lower than "medium" level residual Infection of Reservoirs mandated risk. Roofed and sealed reservoirs 6 - Continued monitoring and Catastrophic Rare Medium systems improvement required. Runoff Disturbances from animals and machinery, events (eg. Country Treatment as detailed for each Music Muster) plant. Construction (grader, Filtration or Continued monitoring and 7 Source Turbidity Moderate Likely 12 - High Some plants have very low likelihood Confident main roads) Flocculation/Sedimentation/ systems improvement required Burn offs / fire fighting Filtration as detailed for each plant. Dam turnover (seasonal) Chlorination (disinfection) Bypass Recycled water from sludge extraction process Moderate Rare 3 - Low Filtration or Organic Runoff Flocculation/Sedimentation/Filtratio Surface water sources are likely. Bores Continued monitoring and 8 Source Matter - Seasonal (including dam Moderate Likely 12 - High Confident n as detailed for each plant. with tannins. systems improvement required Suspended turnover) Chlorination in all plants(disinfection) Moderate Rare 3 - Low Change from dosing coagulation to Natural (too low from RB match pH range of source water pH outside Loss of effective chlorination when pH is bores) pH is monitored, not alarmed. No Continued monitoring and 9 Source the Moderate Likely 12 - High too high Certain Seasonal control for High pH systems improvement required guidelines Coagulation not effective Chemical Additives Operational tests (daily) or online monitored, including turbidity. Moderate Rare 3 - Low Aluminium Copper Treatment as detailed for each Zinc plant. SNAP test results show some issues Continued monitoring and 10 Source Metals Lead Moderate Likely 12 - High Confident Periodic monitoring program to Metals monitored regularly systems improvement required Mercury determine possible poor Cadmium performance. Others Moderate Rare 3 - Low Training plans, mentoring, Council providing training for qualifications. Part of the recruitment process. Processes sufficient to protect All operators to receive training and Untrained or customers to be supervised until qualified and inexperienced operators, Cannot lower an initial "Major" Operational Training and procedure based response judged to have enough experience. 11 All fitters or network staff Major Possible 12 - High Certain consequence to any lower than Errors employed Training provided for all staff. making operational "medium" level residual risk. Qualifications required for some errors Continued monitoring and positions. Training monitored and planning required. updated as necessary. Procedures and WMS in place for tasks as part 5 - of quality system. Major Rare Medium Treatment: Dosing to promote coagulation, followed by high Chlorate , Bromate , pressure sand media filtration. Continued monitoring and 12 Source Anions Fluoride, Sulphate , Moderate Likely 12 - High Monitored regularly Confident Periodic monitoring program to systems improvement required Nitrate, Others determine possible poor performance. Moderate Rare 3 - Low

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ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk Treatment as detailed for each Fertilizers (cropping) plant. Filtration/coagulation: in MV, Goomeri off stream, Kilkivan and Septic systems / STPs 9 - Floc/Sed/Filter in JHWTP, Filtration Continued monitoring and 13 Source Arsenic Moderate Possible Amamoor had some levels, Imbil, Reliable Mining Activities Medium in RB, CC is Floc, sed, filtered, systems improvement required Kandanga > 10% of limit. Old Cattle Dips Kilkivan is filtered, Goomeri is coag/sed/filt/ozone/bac filter Moderate Rare 3 - Low Review of bypass procedures, locks Plant and physical preventions (such as Bypasses 9 - Plant bypasses are in place for all plants. Continued monitoring and 14 Treatment Treatment bypassed Moderate Possible Certain welding shut or blinding). Recycling Medium Procedures prevent usage now. systems improvement required Dewater from sludge extraction decant water process recycled in a timely manner Moderate Rare 3 - Low Most systems are self-controlled, only returning operational information to the Failure of server via telemetry (for example, river communications between Existing Outpost2 system unreliable, pumps). assets, server & operators but local control telemetry is more Black Specks have been found in the Operational Deterioration of reliable. 9 - water from deteriorating flexi couplings. Continued monitoring and 15 All Control reticulation equipment Moderate Possible Estimate Asset Management systems, Medium Rubber deteriorates in time. systems improvement required Failure causing quality issues procedures and practices in place to Some unlined fittings deteriorating Unlined fittings minimise risk of failure and respond (anecdotal evidence) Calibrations not carried in case of failures. All systems have multiple online and out or in error testing equipment that require regular calibrations. Moderate Rare 3 - Low Reticulation monitoring for chlorine Disinfection in Sodium Hypochlorite is dosed at some residuals will pick up high or low Treatment Disinfection 9 - Continued monitoring and 16 Reticulation System has Moderate Possible reservoirs to maintain disinfection Confident levels. & Storage overdosing Medium systems improvement required no online monitoring. residual Operators monitor liquid levels and dose rates frequently. Moderate Rare 3 - Low Disinfection (chlorination) in all plants with a residual high enough to combat small infiltrations due to Aged infrastructure 9 - With mains pressure, it is unlikely to have Continued monitoring and 17 Reticulation Mains failure Moderate Possible Confident mains repairs. Accidental damage Medium hazards enter against the flow of water. systems improvement required Reticulation repair procedures (eg. flushing used, don't cross sewage and water equipment). Moderate Rare 3 - Low RO , blended product to prevent too much softness. Total Hardness 9 - Ion exchange softener. Continued monitoring and 18 Source Dissolved Moderate Possible Limited impact on most networks Reliable Salinity Medium Monitored at all plants and systems improvement required Solids treatment as described for each plant Moderate Rare 3 - Low Ozone Chlorine gas Process control. Treatment Sodium hypochlorite Possible hazards in treated water, but not Online monitoring, continuous chemicals Polyelectrolytes 9 - Continued monitoring and 19 Treatment Moderate Possible present in raw water. Dosed as part of the Confident (including grab samples). wrongly Soda ash Medium systems improvement required treatment process Alarms / plant shutdowns. dosed Aluminium Sulphate Operator monitoring. Fluoride Brine Moderate Rare 3 - Low Standard method is to flush bore system Cleaning to clean. It recirculate it for one day, sit Procedures require the final flush to Source & Bore chemical treatment 9 - Continued monitoring and 20 chemicals, Moderate Possible overnight, flush next day. Bore is isolated Confident be monitored until the flush water Reticulation Pipe repair disinfection Medium systems improvement required Bores from the system via a valve, system is runs clean. flushed before bringing bore back online. Moderate Rare 3 - Low

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ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk Survey in 2003, testing across GRC. All below limits. Possible hazards in treated water Continued monitoring and Disinfection Recent tests show some by- Treatment especially hypochlorite dosing, but not systems improvement required By-products 9 - products but not above ADWG 21 & Prechlorination, THM's Moderate Possible present in raw water. Estimate including design changes when (including Medium values. Snap shot monitoring in Reticulation High risk areas are low flow points in planning plant and network Chlorates) reticulation network. Monitoring reticulation system. upgrades points determined by risk-based approach. Moderate Rare 3 - Low Treatment as detailed for each Seasonal events are evident from the plant. water quality data. These occur in dam Prechlorination - oxidises and filters Runoff 8 - turnover at Borumba, flooding, significant out. Continued monitoring and 22 Source Manganese Groundwater / soil Minor Likely Confident Medium rainfall, low rainfall. Sedimentation will remove systems improvement required Old mines There are so many possible causes that it insoluables . is not always clear. Filters establish a coating that removes Mn Minor Rare 2 - Low Treatment as detailed for each plant. Seasonal events are evident from the Soil Make-up Prechlorination - oxidises and filters water quality data. These occur in dam Runoff Almost 6 - out Continued monitoring and 23 Source Iron Insignificant turnover , flooding, significant rainfall, Confident Lake stratification Certain Medium Sedimentation will remove systems improvement required low rainfall. There are so many possible Lake roll over insoluables causes that it is not always clear. Filters establish a coating that removes Fe Insignificant Rare 1 - Low Nothing monitored for. Rely on Customer feedback. Cannot lower an initial No barrier as the nature of the Backflow devices mandated, Harmful "Catastrophic" consequence to any Treatment, contaminant is unknown. Storages roofed and locked. substances Accidental or intentional 6 - lower than "medium" level residual 24 Reticulation Catastrophic Rare The consequence could definitely be Confident Retic access points locked (not contamination Medium risk. & Storage catastrophic and this has not occurred in Regular inspections and cleanouts identified) Continued monitoring and the past and therefore is a rare event. to be scheduled. systems improvement required. Security for reservoirs. Inspected 6 - regularly by operators. Catastrophic Rare Medium Treatment processes sufficient to provide some protection to No barrier as the nature of the Nothing monitored for. Any customers Harmful contaminant is unknown. suspected quality issues will result Cannot lower an initial substances Accidental or intentional 6 - 25 Source Catastrophic Rare The consequence could definitely be Confident in the plant shut down. "catastrophic" consequence to any (not contamination Medium catastrophic and this has not occurred in Treatment as outlined for each plant lower than "medium" level residual identified) the past and therefore is a rare event. Operators monitor plant and intake. risk. 6 - Continued monitoring and Catastrophic Rare Medium systems improvement required. Reticulation repair procedures (eg. flushing used, don't cross sewage Pipeline construction/ Reticulation 6 - and water equipment). Continued monitoring and 26 Turbidity repair Minor Possible Some plants have very low likelihood Confident & Storage Medium Backflow prevention devices systems improvement required Reservoir turnover mandated Roofed and sealed reservoirs Minor Rare 2 - Low Chemically treating bores Growth of bacteria in the 6 - May occur in bore holes where iron (Envirobore),Sand filtration removes Continued monitoring and 27 Source Iron Bacteria bore, can occur in Minor Possible Confident Medium content in source water is higher. particles. Maintain chlorine residual. systems improvement required reticulation system Raw water colour is indicative. Minor Rare 2 - Low Agricultural runoff / No long-term monitoring data available. Treatment as detailed for each plant. forestry The catchment includes cattle - there are Filtration or Continued monitoring and 28 Source Pesticides Spraying of aquatic Minor Unlikely 4 - Low old stock dips - but no cropping or Estimate Flocculation/Sedimentation/Filtration systems improvement required weeds intensive agriculture (only forestry). No as detailed for each plant. Accidental / deliberate expected pesticide issues but is uncertain. Chlorination in all plants( disinfection) Minor Rare 2 - Low EWSQ040 Page 129 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Fertilizers (cropping) Treatment as detailed for each Continued monitoring and 29 Source Nitrate Septic systems / STPs Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident plant. systems improvement required Fecal Contamination Minor Rare 2 - Low May build up in retic system. Old Growth of bacteria in the pipelines may still have some iron Scour reticulation system, pigging Continued monitoring and 30 Retuculation Iron Bacteria bore, can occur in Minor Unlikely 4 - Low bacteria building up in the line and Confident trunk mains as necessary. systems improvement required reticulation system services. Small service lines may beair scoured. Minor Rare 2 - Low Contaminati As for other All contaminated water would go No open access to flows; Access to Continued monitoring and 31 Source on through Moderate Rare 3 - Low Reliable contamination through treatment normally bore holes pad-locked systems improvement required Bore Head Moderate Rare 3 - Low Only applies to a couple of catchments where it is monitored. Filtration, Ozone & BAC & alternate Most catchments do not include danger source management or Filtration Continued monitoring and 32 Source Cyanotoxins Toxic algal blooms Moderate Rare 3 - Low Confident zones for algae blooms and PAC or RO and source systems improvement required management used in these plants. Treatment as detailed for each plant. Moderate Rare 3 - Low Treatment as detailed for each Anecdotally there has been very minor plant. Fuel tanks in the issues. JHWTP has had rare fuel odours, Hydrocarbon Filtration/coagulation: in MV, Continued monitoring and 33 Source catchment Moderate Rare 3 - Low plant shut down if any suspected Confident s Floc/Sed/Filter in JHWTP, Filtration systems improvement required Service stations contamination. in RB, CC is Floc, sed, filtered, No major storages in the catchment. Low level intakes from river Moderate Rare 3 - Low Fluoride detected about 0.1 mg/L in raw When dosed, Compliant for code of water for Gympie, nowhere near the conduct for fluoride dosing. All Continued monitoring and 34 Source Fluoride Geology Insignificant Rare 1 - Low health limit of 1.5mg/L. Has been tested Certain triple-check systems in place: systems improvement required for in other systems. Highest snapshot operator monitoring, flow limiting, test was Goomeri at 0.2mg/L. fluoride saturator, flow switches, etc. Insignificant Rare 1 - Low

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14.3.2 Table: Existing and Proposed Preventative Measures (Shared) by Whole of Council Treatment Conse- Likeli- Maximum Uncert- Existing Preventive Conse- Likeli- Maximum ID# Hazard Source Comments Comments/Further Actions Phase quence hood Risk ainty Measures quence hood Risk Assume that there is always Bacteria is in the source water. Wastewater treatment Treatment as detailed for Treatment processes sufficient to protect Cattle can access the river, its almost plants each plant. customers certain the they contaminate the Bacteria Septic tanks in catchment Disinfection (chlorination) in Cannot lower an initial "catastrophic" Almost 25 - water with bacteria. Other animals 1 Source (E. Coli, Stock & Wildlife Catastrophic Certain all plants consequence to any lower than "medium" Certain Extreme may also contaminate water. etc) Animal Contamination of Roofed reservoirs level residual risk. A number of townships within the Reservoirs /Plants Procedures in place to Continued monitoring and systems catchments are not sewered. System Bypass protect from bypass events improvement required. of monitoring septic systems cannot be relied upon. Catastrophic Rare 6 - Medium Assume that there is always Bacteria is in the source water. Wastewater treatment Treatment as detailed for Cattle can access the river, its almost Treatment processes sufficient to protect plants each plant. certain the they contaminate the customers Septic tanks in catchment Disinfection (chlorination) in 20 - water with bacteria. Other animals Cannot lower an initial "catastrophic" 2 Source Viruses Stock & Wildlife Catastrophic Likely Certain all plants Extreme may also contaminate water. consequence to any lower than "medium" Animal Contamination of Roofed reservoirs A number of townships within the level residual risk. Reservoirs /Plants Procedures in place to catchments are not sewered. System Continued monitoring required. Bypass protect from bypass events of monitoring septic systems cannot be relied upon. Catastrophic Rare 6 - Medium Assume that there is always Bacteria Wastewater treatment is in the source water. plants Treatment processes sufficient to protect Cattle can access the river, its almost Septic tanks in catchment customers certain the they contaminate the Treatment as detailed for Stock & Wildlife Cannot lower an initial "catastrophic" 20 - water with bacteria. Other animals each plant. 3 Source Protozoa Animal Contamination of Catastrophic Likely Certain consequence to any lower than "medium" Extreme may also contaminate water. Procedures in place to Reservoirs /Plants level residual risk. A number of townships within the protect from bypass events Bypass Continued monitoring and systems catchments are not sewered. System Recycled water from improvement required. of monitoring septic systems cannot sludge extraction process be relied upon. Catastrophic Rare 6 - Medium Runoff Disturbances from animals and machinery, Treatment as detailed for events (eg. Country each plant. Music Muster) Filtration or Construction (grader, Continued monitoring and systems 4 Source Turbidity Moderate Likely 12 - High Some plants have very low likelihood Confident Flocculation/Sedimentation/ main roads) improvement required Filtration as detailed for each Burn offs / fire fighting plant. Dam turnover (seasonal) Chlorination (disinfection) Bypass Recycled water from sludge extraction process Moderate Rare 3 - Low Filtration or Organic Flocculation/Sedimentation/F Runoff Matter - Surface water sources are likely. iltration as detailed for each Continued monitoring and systems 5 Source Seasonal (including dam Moderate Likely 12 - High Confident Suspend Bores with tannins. plant. improvement required turnover) ed Chlorination in all plants(disinfection) Moderate Rare 3 - Low

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Treatment Conse- Likeli- Maximum Uncert- Existing Preventive Conse- Likeli- Maximum ID# Hazard Source Comments Comments/Further Actions Phase quence hood Risk ainty Measures quence hood Risk Aluminium Copper Treatment as detailed for Zinc each plant. SNAP test results show some issues Continued monitoring and systems 6 Source Metals Lead Moderate Likely 12 - High Confident Periodic monitoring program Metals monitored regularly improvement required Mercury to determine possible poor Cadmium performance. Others Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, Chlorate , Bromate , followed by high pressure Fluoride, Continued monitoring and systems 7 Source Anions Moderate Likely 12 - High Monitored regularly Confident sand media filtration. Sulphate , Nitrate improvement required Periodic monitoring program Others to determine possible poor performance. Moderate Rare 3 - Low Treatment as detailed for Fertilizers (cropping) Goomeri off stream, Kilkivan and each plant. Septic systems / STPs 9 - Continued monitoring and systems 8 Source Arsenic Moderate Possible Amamoor had some levels, Imbil, Reliable Periodic monitoring program Mining Activities Medium improvement required Kandanga > 10% of limit. to determine possible poor Old Cattle Dips performance. Moderate Rare 3 - Low RO , blended product to prevent too much softness Total Hardness 9 - Ion exchange softener. Continued monitoring and systems 9 Source Dissolved Moderate Possible Limited impact on most networks Reliable Salinity Medium Monitored at all plants and improvement required Solids treatment as described for each plant Moderate Rare 3 - Low Treatment as detailed for Seasonal events are evident from the each plant. water quality data. These occur in Prechlorination - oxidises and Runoff Mangane 8 - dam turnover at Borumba, flooding, filters out. Continued monitoring and systems 10 Source Groundwater / soil Minor Likely Confident se Medium significant rainfall, low rainfall. Sedimentation will remove improvement required Old mines There are so many possible causes insoluables . that it is not always clear. Filters establish a coating that removes Mn Minor Rare 2 - Low Treatment as detailed for Seasonal events are evident from the each plant. Soil Make-up water quality data. These occur in Prechlorination - oxidises and Runoff Almost 6 - dam turnover , flooding, significant filters out Continued monitoring and systems 11 Source Iron Insignificant Confident Lake stratification Certain Medium rainfall, low rainfall. There are so Sedimentation will remove improvement required Lake roll over many possible causes that it is not insoluables always clear. Filters establish a coating that removes Fe Insignificant Rare 1 - Low No long-term monitoring data Treatment as detailed for Agricultural runoff / available. The catchment includes each plant. forestry cattle - there are old stock dips - but Filtration or Spraying of aquatic Pesticide no cropping or intensive agriculture Flocculation/Sedimentation/ Continued monitoring and systems 12 Source weeds Minor Unlikely 4 - Low Estimate s (only forestry). No expected pesticide Filtration as detailed for each improvement required Accidental / deliberate issues but is uncertain. plant. spills Pesticide testing has shown v low or Chlorination in all plants Old cattle dips no levels. (disinfection) Minor Rare 2 - Low Fertilizers (cropping) Treatment as detailed for Continued monitoring and systems 13 Source Nitrate Septic systems / STPs Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident each plant. improvement required Fecal Contamination Minor Rare 2 - Low

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Treatment Conse- Likeli- Maximum Uncert- Existing Preventive Conse- Likeli- Maximum ID# Hazard Source Comments Comments/Further Actions Phase quence hood Risk ainty Measures quence hood Risk Only applies to a couple of catchments where it is monitored. Filtration, Ozone & BAC & alternate source Cyanotox Most catchments do not include Continued monitoring and systems 14 Source Toxic algal blooms Moderate Rare 3 - Low Confident management or Filtration and ins danger zones for algae blooms improvement required PAC or RO and source management used in these plants. Treatment as detailed for each plant. Moderate Rare 3 - Low Treatment as detailed for Anecdotally there has been very each plant. Fuel tanks in the minor issues. JHWTP has had rare Filtration/coagulation: in MV, Hydrocar Continued monitoring and systems 15 Source catchment Moderate Rare 3 - Low fuel odours, plant shut down if any Confident Floc/Sed/Filter in JHWTP, bons improvement required Service stations suspected contamination. Filtration in RB, CC is Floc, No major storages in the catchment. sed, filtered, Low level intakes from river Moderate Rare 3 - Low

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14.3.3 Table: Existing and Proposed Preventative Measures for Amamoor

ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood m Risk Assume that there is always Bacteria is in the Wastewater treatment Treatment processes sufficient to source water. Treatment: Dosing to promote plants protect customers Cattle can access the river, its almost certain the coagulation, followed by high Septic tanks in Cannot lower an initial Bacteria they contaminate the water with bacteria. Other pressure sand media filtration. catchment Almost 25 - "catastrophic" consequence to any 1 Source (E. Coli, Catastrophic animals may also contaminate water. Certain Disinfection (chlorination) by Stock & Wildlife Certain Extreme lower than "medium" level residual etc) A number of townships within the catchments hypochlorite Animal Contamination risk. are not sewered. Procedures in place to protect from of Reservoirs /Plants Continued monitoring and systems System of monitoring septic systems cannot be bypass events 6 - Bypass improvement required. relied upon. Catastrophic Rare Medium Assume that there is always Bacteria is in the Wastewater treatment source water. Treatment: Dosing to promote Treatment processes sufficient to plants Cattle can access the river, its almost certain the coagulation, followed by high protect customers Septic tanks in they contaminate the water with bacteria. Other pressure sand media filtration. Cannot lower an initial catchment 20 - 2 Source Viruses Catastrophic Likely animals may also contaminate water. Certain Disinfection (chlorination) by "catastrophic" consequence to any Stock & Wildlife Extreme A number of townships within the catchments hypochlorite lower than "medium" level residual Animal Contamination are not sewered. Procedures in place to protect from risk. of Reservoirs /Plants System of monitoring septic systems cannot be bypass events 6 - Continued monitoring required. Bypass relied upon. Catastrophic Rare Medium Wastewater treatment plants Assume that there is always Bacteria is in the Treatment processes sufficient to Septic tanks in source water. protect customers catchment Cattle can access the river, its almost certain the Treatment: Dosing to promote Cannot lower an initial Stock & Wildlife they contaminate the water with bacteria. Other coagulation, followed by high 20 - "catastrophic" consequence to any 3 Source Protozoa Animal Contamination Catastrophic Likely animals may also contaminate water. Certain pressure sand media filtration. Extreme lower than "medium" level residual of Reservoirs /Plants A number of townships within the catchments Procedures in place to protect from risk. Bypass are not sewered. bypass events Continued monitoring and systems Recycled water from System of monitoring septic systems cannot be improvement required. sludge extraction relied upon. 6 - process Catastrophic Rare Medium Runoff Disturbances from animals and machinery, events (eg. Country Treatment: Dosing to promote Music Muster) coagulation, followed by high Construction (grader, pressure sand media filtration. Turbidity main roads) Continued monitoring and systems 4 Source Moderate Likely 12 - High During high rainfall periods Confident Disinfection (chlorination) by & Colour Burn offs / fire fighting improvement required hypochlorite Dam turnover Procedures in place to protect from (seasonal) bypass events. Bypass Recycled water from sludge extraction process Moderate Rare 3 - Low Organic More regular filter backwashing as Matter - Runoff Surface water sources are likely. Bores with Continued monitoring and systems 5 Source Moderate Likely 12 - High Confident indicated by headless during Suspend Seasonal tanins. improvement required events. ed Moderate Rare 3 - Low Treatment: Dosing to promote Barium, Boron, coagulation, followed by high Chromium, Manganese, pressure sand media filtration. Continued monitoring and systems 6 Source Metals Molybdenum, Nickel Moderate Likely 12 - High Metals monitored regularly Confident Periodic monitoring program to improvement required and determine possible poor Others performance. Moderate Rare 3 - Low

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ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood m Risk Update plant to pre and post dosing of chlorine to lessen by-product Found in concentrations well below ADWG. production. Periodic monitoring program to Chlorate By product of pre-dosing hypo to oxidise metals Create clear water tank and 7 Reticulation Anions Moderate Likely 12 - High Confident determine possible poor Others and having to maintain high chlorine residuals dedicated trunk main to reservoir to performance. from plant due to direct feed into reticulation. lower required dosage of hypo. Continued monitoring and systems Moderate Rare 3 - Low improvement required Fertilizers (cropping) Treatment: Dosing to promote Septic systems Possibl 9 - Continued monitoring and systems 8 Source Arsenic Moderate Amamoor had some evidenced Reliable coagulation, followed by high Mining Activities e Medium improvement required pressure sand media filtration. Old Cattle Dips Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, followed by high Seasonal events are evident from the water pressure sand media filtration. quality data. These occur in dam turnover at Runoff Prechlorination - oxidises and aids Mangane 8 - Borumba, flooding, significant rainfall, low Continued monitoring and systems 9 Source Groundwater / soil Minor Likely Confident filtration. se Medium rainfall. improvement required Old mines Sedimentation will remove There are so many possible causes that it is not insoluables . always clear. Filters establish a coating that removes Mn Minor Rare 2 - Low Treatment: Dosing to promote coagulation, followed by high Seasonal events are evident from the water pressure sand media filtration. quality data. These occur in dam turnover , Prechlorination - oxidises and aids Soil Make-up Almost 6 - Continued monitoring and systems 10 Source Iron Insignificant flooding, significant rainfall, low rainfall. There Confident filtration. Runoff Certain Medium improvement required are so many possible causes that it is not always Sedimentation will remove clear. insoluables . Filters establish a coating that removes Mn Insignificant Rare 1 - Low

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14.3.4 Table: Existing and Proposed Preventative Measures for Goomeri ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk Treatment processes Assume that there is always Bacteria is in the Wastewater treatment Treatment: Water is treated by means of the sufficient to protect source water. plants following process: customers Cattle can access the river, its almost certain Septic tanks in Flocculation & Settling; Sand Filtration; Cannot lower an initial Bacteria the they contaminate the water with bacteria. catchment Almost 25 - Ozone(during algal outbreaks); BAC filtration "catastrophic" consequence 1 Source (E. Coli, Catastrophic Other animals may also contaminate water. Certain Stock & Wildlife Certain Extreme (during algal outbreaks); Chlorination to any lower than "medium" etc) A number of townships within the Animal Contamination Softening; pH correction; level residual risk. catchments are not sewered. System of of Reservoirs /Plants Procedures in place to protect from bypass Continued monitoring and monitoring septic systems cannot be relied Bypass events 6 - systems improvement upon. Catastrophic Rare Medium required. Assume that there is always Bacteria is in the Treatment processes Wastewater treatment Treatment: Water is treated by means of the source water. sufficient to protect plants following process: Cattle can access the river, its almost certain customers Septic tanks in Flocculation & Settling; Sand Filtration; the they contaminate the water with bacteria. Cannot lower an initial catchment 20 - Ozone(during algal outbreaks); BAC filtration 2 Source Viruses Catastrophic Likely Other animals may also contaminate water. Certain "catastrophic" consequence Stock & Wildlife Extreme (during algal outbreaks); Chlorination A number of townships within the to any lower than "medium" Animal Contamination Softening; pH correction; Chlorination catchments are not sewered. System of level residual risk. of Reservoirs /Plants Procedures in place to protect from bypass monitoring septic systems cannot be relied 6 - Continued monitoring Bypass events upon. Catastrophic Rare Medium required. Wastewater treatment Treatment processes plants Assume that there is always Bacteria is in the Treatment: Water is treated by means of the sufficient to protect Septic tanks in source water. following process: customers catchment Cattle can access the river, its almost certain Flocculation & Settling; Sand Filtration; Cannot lower an initial Stock & Wildlife the they contaminate the water with bacteria. 20 - Ozone(during algal outbreaks); BAC filtration "catastrophic" consequence 3 Source Protozoa Animal Contamination Catastrophic Likely Other animals may also contaminate water. Certain Extreme (during algal outbreaks); Chlorination to any lower than "medium" of Reservoirs /Plants A number of townships within the Softening; pH correction. level residual risk. Bypass catchments are not sewered. System of Procedures in place to protect from bypass Continued monitoring and Recycled water from monitoring septic systems cannot be relied events systems improvement sludge extraction upon. 6 - required. process Catastrophic Rare Medium Runoff Disturbances from animals and machinery, events (eg. Country Treatment: Water is treated by means of the Music Muster) following process: Construction (grader, Flocculation & Settling; Sand Filtration; Continued monitoring and Turbidity main roads) Off-stream storage use minimised when Ozone(during algal outbreaks); BAC filtration 4 Source Moderate Likely 12 - High Confident systems improvement & Colour Burn offs / fire fighting carry through from harvesting is high. (during algal outbreaks); Chlorination required Dam turnover Softening; pH correction; (seasonal) Procedures in place to protect from bypass Bypass events Recycled water from sludge extraction process Moderate Rare 3 - Low Treatment: Water is treated by means of the following process: Organic Flocculation & Settling; Sand Filtration; Runoff Continued monitoring and Matter - Surface water sources are likely. Bores with Ozone(during algal outbreaks); BAC filtration 5 Source Seasonal (including Moderate Likely 12 - High Confident systems improvement Suspende tannins. (during algal outbreaks); Chlorination dam turnover) required d Softening; pH correction; Procedures in place to protect from bypass events Moderate Rare 3 - Low Barium, Boron, Treatment: Water is treated by means of the Continued monitoring and SNAP test results show some low level signs 6 Source Metals Chromium, Manganese, Moderate Likely 12 - High Confident following process: systems improvement Metals monitored regularly Molybdenum, Nickel Flocculation & Settling; Sand Filtration; Moderate Rare 3 - Low required EWSQ040 Page 136 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk and Ozone(during algal outbreaks); BAC filtration Others (during algal outbreaks); Chlorination Softening; pH correction; Procedures in place to protect from bypass events. Periodic monitoring program to determine possible poor performance.

Found in concentrations well below ADWG. Continued monitoring and Chlorate By product of dosing hypo to maintain high Periodic monitoring program to determine 7 Reticulation Anions Moderate Likely 12 - High Confident systems improvement Others chlorine residuals from plant due to direct possible poor performance. required feed into reticulation.

Moderate Rare 3 - Low Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Fertilizers (cropping) Ozone(during algal outbreaks); BAC filtration Continued monitoring and Septic systems / STPs Possibl 9 - Goomeri off-stream storage showed some (during algal outbreaks); Chlorination 8 Source Arsenic Moderate Reliable systems improvement Mining Activities e Medium levels around 10% of limit. Softening; pH correction; Chlorination required Old Cattle Dips Procedures in place to protect from bypass events. Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Total Continued monitoring and Hardness Possibl 9 - Softening; pH correction; Chlorination 9 Source Dissolved Moderate Limited impact on most networks Reliable systems improvement Salinity e Medium Procedures in place to protect from bypass Solids required events. Blended Raw water to minimise problem. Ion exchange softener. Monitored at all plants and treatment as described for each plant Moderate Rare 3 - Low Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration Seasonal events are evident from the water Runoff (during algal outbreaks); Chlorination Continued monitoring and Mangane 8 - quality data. 10 Source Groundwater / soil Minor Likely Confident Softening; pH correction; Chlorination systems improvement se Medium There are so many possible causes that it is Old mines Procedures in place to protect from bypass required not always clear. events. Prechlorination - oxidises and filters out. Sedimentation will remove insoluables Filters establish a coating that removes Mn Minor Rare 2 - Low Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Total Ozone(during algal outbreaks); BAC filtration Continued monitoring and Hardness Possibl 9 - 11 Source Dissolved Moderate Plant designed to handle specific problem Reliable (during algal outbreaks); Chlorination systems improvement Salinity e Medium Solids Softening; pH correction; required Blended raw water Ion exchange softener. Monitored Moderate Rare 3 - Low

EWSQ040 Page 137 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

ID Treatment Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood Risk ainty quence hood Risk Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Seasonal events are evident from the water Soil Make-up Ozone(during algal outbreaks); BAC filtration quality data. These occur in storage turnover Continued monitoring and Runoff Almost 6 - (during algal outbreaks); Chlorination 12 Source Iron Insignificant , flooding, significant rainfall, low rainfall. Confident systems improvement Lake stratification Certain Medium Softening; pH correction; Chlorination There are so many possible causes that it is required Lake roll over Procedures in place to protect from bypass not always clear. events. Sedimentation will remove insoluables Filters establish a coating that removes Fe Insignificant Rare 1 - Low Growth of bacteria in Chemically treating bores (Envirobore),Sand Continued monitoring and Iron Possibl 6 - May occur in bore holes where iron content 13 Source the bore, can occur in Minor Confident filtration removes particles. Maintain chlorine systems improvement Bacteria e Medium in source water is higher. reticulation system residual. Raw water colour is indicative. Minor Rare 2 - Low required Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Fertilizers (cropping) Continued monitoring and 8 - Ozone(during algal outbreaks); BAC filtration 14 Source Nitrate Septic systems / STPs Minor Likely Monitored half yearly. Confident systems improvement Medium (during algal outbreaks); Chlorination Fecal Contamination required Softening; pH correction; Chlorination Procedures in place to protect from bypass events. Minor Rare 2 - Low Filtration, Ozone & BAC & alternate source management used . Treatment: Water is treated by means of the following process: Continued monitoring and Cyanotox Reduced use of off-stream storage during Flocculation & Settling; Sand Filtration; 15 Source Toxic algal blooms Moderate Rare 3 - Low Confident systems improvement ins algae blooms Ozone(during algal outbreaks); BAC filtration required (during algal outbreaks); Procedures in place to protect from bypass events. Moderate Rare 3 - Low

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14.3.4 Table: Existing and Proposed Preventative Measures for Gympie

ID Treatmen Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # t Phase quence hood Risk ainty quence hood m Risk Assume that there is always Bacteria is in the source water. Treatment processes sufficient to Wastewater treatment plants Cattle can access the river, its almost protect customers Coagulation, sedimentation, Septic tanks in catchment certain the they contaminate the water with Cannot lower an initial Bacteria filtration, pH correction and Stock & Wildlife Almost 25 - bacteria. Other animals may also "catastrophic" consequence to any 1 Source (E. Coli, Catastrophic Certain disinfection Animal Contamination of Certain Extreme contaminate water. lower than "medium" level residual etc) Procedures in place to protect from Reservoirs /Plants A number of townships within the risk. bypass events Bypass catchments are not sewered. System of Continued monitoring and systems monitoring septic systems cannot be relied 6 - improvement required. upon. Catastrophic Rare Medium Assume that there is always Bacteria is in the source water. Treatment processes sufficient to Wastewater treatment plants Cattle can access the river, its almost Coagulation, sedimentation, protect customers Septic tanks in catchment certain the they contaminate the water with filtration, pH correction and Cannot lower an initial Stock & Wildlife 20 - bacteria. Other animals may also 2 Source Viruses Catastrophic Likely Certain disinfection "catastrophic" consequence to any Animal Contamination of Extreme contaminate water. Procedures in place to protect from lower than "medium" level residual Reservoirs /Plants A number of townships within the bypass events risk. Bypass catchments are not sewered. System of Continued monitoring required. monitoring septic systems cannot be relied 6 - upon Catastrophic Rare Medium Assume that there is always Bacteria is in Wastewater treatment plants the source water. Treatment processes sufficient to Septic tanks in catchment Cattle can access the river, its almost protect customers Stock & Wildlife certain the they contaminate the water with Coagulation, sedimentation, Cannot lower an initial Animal Contamination of 20 - bacteria. Other animals may also filtration, pH correction "catastrophic" consequence to any 3 Source Protozoa Catastrophic Likely Certain Reservoirs /Plants Extreme contaminate water. Procedures in place to protect from lower than "medium" level residual Bypass A number of townships within the bypass events risk. Recycled water from sludge catchments are not sewered. System of Continued monitoring and systems extraction process monitoring septic systems cannot be relied 6 - improvement required. upon. Catastrophic Rare Medium Runoff Disturbances from animals and machinery, events (eg. Country Music Muster) Construction (grader, main Coagulation, sedimentation, Continued monitoring and systems 4 Source Turbidity roads) Moderate Likely 12 - High Some plants have very low likelihood Confident filtration, pH correction and improvement required Burn offs / fire fighting disinfection Dam turnover (seasonal) Bypass Recycled water from sludge extraction process Moderate Rare 3 - Low Organic Matter - Runoff Coagulation, sedimentation, Surface water sources are likely. Bores with Continued monitoring and systems 5 Source Suspended Seasonal (including dam Moderate Likely 12 - High Confident filtration, pH correction and tanins. improvement required & turnover) disinfection Dissolved Moderate Rare 3 - Low Coagulation, sedimentation, filtration, Barium, Boron, Chromium, pH correction Manganese, Molybdenum, SNAP test results show some issues Continued monitoring and systems 6 Source Metals Moderate Likely 12 - High Confident Periodic monitoring program to Nickel and Metals monitored regularly improvement required determine possible poor Others performance. Moderate Rare 3 - Low

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ID Treatmen Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # t Phase quence hood Risk ainty quence hood m Risk Treatment: Dosing to promote Chlorate , Bromate , coagulation, followed by high Fluoride, pressure sand media filtration. Continued monitoring and systems 7 Source Anions Moderate Likely 12 - High Monitored regularly Confident Sulphate , Nitrate Periodic monitoring program to improvement required Others determine possible poor performance. Moderate Rare 3 - Low Treatment: Dosing to promote Fertilizers (cropping) coagulation, followed by high Goomeri off stream, Kilkivan and Amamoor Septic systems / STPs 9 - pressure sand media filtration. Continued monitoring and systems 8 Source Arsenic Moderate Possible had some levels, Imbil, Kandanga > 10% of Reliable Mining Activities Medium Periodic monitoring program to improvement required limit. Old Cattle Dips determine possible poor performance. Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, followed by high Total Hardness 9 - pressure sand media filtration. Continued monitoring and systems 9 Source Dissolve Moderate Possible Limited impact on most networks Reliable Salinity Medium Periodic monitoring program to improvement required d Solids determine possible poor performance. Moderate Rare 3 - Low Coagulation, sedimentation, Cyanoto 9 - filtration, pH correction Continued monitoring and systems 10 Source Toxic algal blooms Moderate Possible Alerted of algal blooms in Dam Confident xins Medium Low level intakes from river improvement required Varying off-take levels from dam Moderate Rare 3 - Low Seasonal events are evident from the water Coagulation, sedimentation, quality data. These occur in dam turnover filtration, pH correction Runoff Mangan 8 - at Borumba, flooding, significant rainfall, Sedimentation will remove Continued monitoring and systems 11 Source Groundwater / soil Minor Likely Confident ese Medium low rainfall. insoluables . improvement required Old mines There are so many possible causes that it is Filters establish a coating that not always clear. removes Mn Minor Rare 2 - Low Coagulation, sedimentation, Seasonal events are evident from the water Soil Make-up filtration, pH correction quality data. These occur in dam turnover , Runoff Almost 6 - Sedimentation will remove Continued monitoring and systems 12 Source Iron Insignificant flooding, significant rainfall, low rainfall. Confident Lake stratification Certain Medium insoluables improvement required There are so many possible causes that it Lake roll over Filters establish a coating that is not always clear. removes Fe Insignificant Rare 1 - Low No long-term monitoring data available. The catchment includes cattle - there are Agricultural runoff / forestry old stock dips - but no cropping or Pesticide Spraying of aquatic weeds Coagulation, sedimentation, Continued monitoring and systems 13 Source Minor Unlikely 4 - Low intensive agriculture (only forestry). No Estimate s Accidental / deliberate spills filtration, pH correction improvement required expected pesticide issues but is uncertain. Old cattle dips Pesticide testing has shown v low or no levels. Minor Rare 2 - Low Fertilizers (cropping) Coagulation, sedimentation, Continued monitoring and systems 14 Source Nitrate Septic systems / STPs Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident filtration, pH correction and improvement required Fecal Contamination disinfection Minor Rare 2 - Low Anecdotally there has been very minor issues. JHWTP has had rare fuel odours, Hydroca Fuel tanks in the catchment Coagulation, sedimentation, Continued monitoring and systems 15 Source Moderate Rare 3 - Low plant shut down if any suspected Confident rbons Service stations filtration, pH correction improvement required contamination. No major storages in the catchment. Moderate Rare 3 - Low

EWSQ040 Page 140 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

14.3.5 Table: Existing and Proposed Preventative Measures for Imbil ID Treatment Conse- Likeli- Maximu Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood m Risk ainty quence hood m Risk Assume that there is always Bacteria is in the Treatment processes sufficient Wastewater treatment source water. Treatment: Dosing to promote coagulation, to protect customers plants Cattle can access the river, its almost certain the followed by high pressure sand media Cannot lower an initial Bacteria Septic tanks in catchment Catastrop Almost 25 - they contaminate the water with bacteria. Other filtration. "catastrophic" consequence to 1 Source (E. Coli, Stock & Wildlife Certain hic Certain Extreme animals may also contaminate water. Disinfection (chlorination) by hypochlorite any lower than "medium" level etc) Animal Contamination of A number of townships within the catchments Procedures in place to protect from bypass residual risk. Reservoirs /Plants are not sewered. System of monitoring septic events 6 - Continued monitoring and Bypass systems cannot be relied upon. Catastrophic Rare Medium systems improvement required. Assume that there is always Bacteria is in the Treatment processes sufficient Wastewater treatment source water. Treatment: Dosing to promote coagulation, to protect customers plants Cattle can access the river, its almost certain the followed by high pressure sand media Cannot lower an initial Septic tanks in catchment Catastrop 20 - they contaminate the water with bacteria. Other filtration. "catastrophic" consequence to 2 Source Viruses Stock & Wildlife Likely Certain hic Extreme animals may also contaminate water. Disinfection (chlorination) by hypochlorite any lower than "medium" level Animal Contamination of A number of townships within the catchments Procedures in place to protect from bypass residual risk. Reservoirs /Plants are not sewered. System of monitoring septic events 6 - Continued monitoring Bypass systems cannot be relied upon. Catastrophic Rare Medium required. Wastewater treatment Assume that there is always Bacteria is in the Treatment processes sufficient plants source water. to protect customers Septic tanks in catchment Treatment: Dosing to promote coagulation, Cattle can access the river, its almost certain the Cannot lower an initial Stock & Wildlife followed by high pressure sand media Catastrop 20 - they contaminate the water with bacteria. Other "catastrophic" consequence to 3 Source Protozoa Animal Contamination of Likely Certain filtration. hic Extreme animals may also contaminate water. any lower than "medium" level Reservoirs /Plants Procedures in place to protect from bypass A number of townships within the catchments residual risk. Bypass events are not sewered. System of monitoring septic Continued monitoring and Recycled water from 6 - systems cannot be relied upon. systems improvement required. sludge extraction process Catastrophic Rare Medium Runoff Disturbances from animals and machinery, events (eg. Treatment: Dosing to promote coagulation, Country Music Muster) followed by high pressure sand media Construction (grader, main filtration. Continued monitoring and 4 Source Turbidity roads) Moderate Likely 12 - High During high rainfall periods and dam turn-over Confident Disinfection (chlorination) by hypochlorite systems improvement required Burn offs / fire fighting Procedures in place to protect from bypass Dam turnover (seasonal) events. Bypass Different off-take levels in dam Recycled water from sludge extraction process Moderate Rare 3 - Low Organic Different off-take levels in dam Matter - Runoff Continued monitoring and 5 Source Moderate Likely 12 - High Surface water sources are likely. Confident More regular filter backwashing as Suspend Seasonal systems improvement required indicated by headless during events. ed Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, Barium, Boron, Chromium, followed by high pressure sand media Manganese, Molybden, Continued monitoring and 6 Source Metals Moderate Likely 12 - High Metals monitored regularly Confident filtration. Nickel and systems improvement required Periodic monitoring program to determine Others possible poor performance. Moderate Rare 3 - Low Update plant to pre and post dosing of chlorine to lessen by- product production. Found in concentrations well below ADWG. Create clear water tank and Chlorate By product of pre-dosing hypo to oxidise metals Periodic monitoring program to determine 7 Reticulation Anions Moderate Likely 12 - High Confident dedicated trunk main to Others and having to maintain high chlorine residuals possible poor performance. reservoir to lower required from plant due to direct feed into reticulation. dosage of hypo. Continued monitoring and systems Moderate Rare 3 - Low improvement required

EWSQ040 Page 141 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

ID Treatment Conse- Likeli- Maximu Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # Phase quence hood m Risk ainty quence hood m Risk Fertilizers (cropping) Treatment: Dosing to promote coagulation, Septic systems Moderat 9 - Continued monitoring and 8 Source Arsenic Possible Some evidenced Reliable followed by high pressure sand media Mining Activities e Medium systems improvement required filtration. Old Cattle Dips Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, Seasonal events are evident from the water followed by high pressure sand media quality data. These occur in dam turnover at Runoff filtration. Mangane 8 - Borumba, flooding, significant rainfall, low Continued monitoring and 9 Source Groundwater / soil Minor Likely Confident Prechlorination - oxidises and aids se Medium rainfall. systems improvement required Old mines filtration. There are so many possible causes that it is not Sedimentation will remove insoluables . always clear. Filters establish a coating that removes Mn Minor Rare 2 - Low Treatment: Dosing to promote coagulation, Seasonal events are evident from the water followed by high pressure sand media quality data. These occur in dam turnover, filtration. Soil Make-up Insignific Almost 6 - Continued monitoring and 10 Source Iron flooding, significant rainfall, low rainfall. There Confident Prechlorination - oxidises and aids Runoff ant Certain Medium systems improvement required are so many possible causes that it is not always filtration. clear. Sedimentation will remove insoluables Filters establish a coating that removes Mn Insignificant Rare 1 - Low

EWSQ040 Page 142 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

14.3.6 Table: Existing and Proposed Preventative Measures for Kandanga ID Treatmen Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximu Hazard Source Comments Existing Preventive Measures Comments/Further Actions # t Phase quence hood Risk ainty quence hood m Risk Assume that there is always Bacteria is in the Treatment processes sufficient Wastewater treatment plants source water. Treatment: Dosing to promote coagulation, to protect customers Septic tanks in catchment Cattle can access the river, its almost certain followed by high pressure sand media Cannot lower an initial Bacteria Stock & Wildlife Catastrophi Almost 25 - the they contaminate the water with bacteria. filtration. "catastrophic" consequence to 1 Source (E. Coli, Certain Animal Contamination of c Certain Extreme Other animals may also contaminate water. Disinfection (chlorination) by hypochlorite any lower than "medium" level etc) Reservoirs /Plants A number of townships within the catchments Procedures in place to protect from bypass residual risk. Bypass are not sewered. System of monitoring septic events Catastroph 6 - Continued monitoring and systems cannot be relied upon. ic Rare Medium systems improvement required. Assume that there is always Bacteria is in the Treatment processes sufficient Wastewater treatment plants source water. Treatment: Dosing to promote coagulateion, to protect customers Septic tanks in catchment Cattle can access the river, its almost certain followed by high pressure sand media Cannot lower an initial Stock & Wildlife Catastrophi 20 - the they contaminate the water with bacteria. filtration. "catastrophic" consequence to 2 Source Viruses Likely Certain Animal Contamination of c Extreme Other animals may also contaminate water. Disinfection (chlorination) by hypochlorite any lower than "medium" level Reservoirs /Plants A number of townships within the catchments Procedures in place to protect from bypass residual risk. Bypass are not sewered. System of monitoring septic events Catastroph 6 - Continued monitoring systems cannot be relied upon. ic Rare Medium required. Wastewater treatment plants Assume that there is always Bacteria is in the Treatment processes sufficient Septic tanks in catchment source water. to protect customers Treatment: Dosing to promote coagulation, Stock & Wildlife Cattle can access the river, its almost certain Cannot lower an initial followed by high pressure sand media Protozo Animal Contamination of Catastrophi 20 - the they contaminate the water with bacteria. "catastrophic" consequence to 3 Source Likely Certain filtration. a Reservoirs /Plants c Extreme Other animals may also contaminate water. any lower than "medium" level Procedures in place to protect from bypass Bypass A number of townships within the catchments residual risk. events Recycled water from sludge are not sewered. System of monitoring septic Catastroph 6 - Continued monitoring and extraction process systems cannot be relied upon. ic Rare Medium systems improvement required. Runoff Disturbances from animals and machinery, events (eg. Treatment: Dosing to promote coagulation, Country Music Muster) followed by high pressure sand media Construction (grader, main Turbidit filtration. Continued monitoring and 4 Source roads) Moderate Likely 12 - High During periods of high rainfall Confident y Disinfection (chlorination) by hypochlorite systems improvement required Burn offs / fire fighting Procedures in place to protect from bypass Dam turnover (seasonal) events Bypass Recycled water from sludge extraction process Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Organic Disinfection (chlorination) by hypochlorite Matter - Runoff Continued monitoring and 5 Source Moderate Likely 12 - High Surface water sources are likely. Confident Procedures in place to protect from bypass Suspend Seasonal systems improvement required events ed More regular filter back-washing as indicated by headless in high turbidity periods Moderate Rare 3 - Low Treatment: Dosing to promote coagulation, Barium, Boron, Chromium, followed by high pressure sand media Manganese, Molybden, Continued monitoring and 6 Source Metals Moderate Likely 12 - High Metals monitored regularly Confident filtration. Nickel and systems improvement required Periodic monitoring program to determine Others possible poor performance. Moderate Rare 3 - Low Update plant to pre and post Found in concentrations well below ADWG. dosing of chlorine to lessen by- By product of pre-dosing hypo to oxidise Chlorate Periodic monitoring program to determine product production. 7 Reticulation Anions Moderate Likely 12 - High metals and having to maintain high chlorine Confident Others possible poor performance. Create clear water tank and residuals from plant due to direct feed into dedicated trunk main to reticulation. Moderate Rare 3 - Low reservoir to lower required EWSQ040 Page 143 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Fertilizers (cropping) Treatment: Dosing to promote coagulation, Septic systems Possibl 9 - Continued monitoring and 8 Source Arsenic Moderate Amamoor had some evidenced Reliable followed by high pressure sand media Mining Activities e Medium systems improvement required filtration. Old Cattle Dips Moderate Rare 3 - Low Seasonal events are evident from the water Treatment: Dosing to promote coagulation, quality data. These occur in dam turnover at followed by high pressure sand media Runoff Mangan 8 - barumba, flooding, significant rainfall, low filtration. Continued monitoring and 9 Source Groundwater / soil Minor Likely Confident ese Medium rainfall. Prechlorination - oxidises and aids filtration. systems improvement required Old mines There are so many possible causes that it is Sedimentation will remove insoluables . not always clear. Filters establish a coating that removes Mn Minor Rare 2 - Low Treatment: Dosing to promote coagulation, Seasonal events are evident from the water followed by high pressure sand media quality data. These occur in dam turnover , Soil Make-up Insignifican Almost 6 - filtration. Continued monitoring and 10 Source Iron flooding, significant rainfall, low rainfall. There Confident Runoff t Certain Medium Prechlorination - oxidises and aids filtration. systems improvement required are so many possible causes that it is not Sedimentation will remove insoluables . Insignifica always clear. Filters establish a coating that removes Mn nt Rare 1 - Low

EWSQ040 Page 144 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

14.3.6 Table: Existing and Proposed Preventative Measures for Kilkivan ID Treatment Conse- Likeli- Maximum Uncert- Existing Preventive Conse- Likeli- Maximum Hazard Source Comments Comments/Further Actions # Phase quence hood Risk ainty Measures quence hood Risk Assume that there is always Bacteria is in the source water. Wastewater treatment Treatment processes sufficient to Cattle can access the river, its almost plants Treatment: Dosed low pressure protect customers certain the they contaminate the water Bacteria Septic tanks in catchment sand filter; RO filtration; Cannot lower an initial "catastrophic" Almost 25 - with bacteria. Other animals may also 1 Source (E. Coli, Stock & Wildlife Catastrophic Certain Chlorination. consequence to any lower than Certain Extreme contaminate water. etc) Animal Contamination of Procedures in place to protect "medium" level residual risk. A number of townships within the Reservoirs /Plants from bypass events Continued monitoring and systems catchments are not sewered. System of Bypass improvement required. monitoring septic systems cannot be 6 - relied upon. Catastrophic Rare Medium Assume that there is always Bacteria is in the source water. Wastewater treatment Cattle can access the river, its almost Treatment processes sufficient to plants Treatment: Dosed low pressure certain the they contaminate the water protect customers Septic tanks in catchment sand filter; RO filtration; 20 - with bacteria. Other animals may also Cannot lower an initial "catastrophic" 2 Source Viruses Stock & Wildlife Catastrophic Likely Certain Chlorination. Extreme contaminate water. consequence to any lower than Animal Contamination of Procedures in place to protect A number of townships within the "medium" level residual risk. Reservoirs /Plants from bypass events catchments are not sewered. System of Continued monitoring required. Bypass monitoring septic systems cannot be 6 - relied upon. Catastrophic Rare Medium Assume that there is always Bacteria is in Wastewater treatment the source water. plants Treatment processes sufficient to Cattle can access the river, its almost Septic tanks in catchment Treatment: Dosed low pressure protect customers certain the they contaminate the water Stock & Wildlife sand filter; RO filtration; Cannot lower an initial "catastrophic" 20 - with bacteria. Other animals may also 3 Source Protozoa Animal Contamination of Catastrophic Likely Certain Chlorination. consequence to any lower than Extreme contaminate water. Reservoirs /Plants Procedures in place to protect "medium" level residual risk. A number of townships within the Bypass from bypass events Continued monitoring and systems catchments are not sewered. System of Recycled water from improvement required. monitoring septic systems cannot be 6 - sludge extraction process relied upon. Catastrophic Rare Medium Runoff Disturbances from animals and machinery, events (eg. Treatment as detailed for each Country Music Muster) plant. Construction (grader, main Filtration or Off-stream storage use minimised when Continued monitoring and systems 4 Source Turbidity roads) Moderate Likely 12 - High Confident Flocculation/Sedimentation/ carry through from harvesting is high. improvement required Burn offs / fire fighting Filtration as detailed for each Dam turnover (seasonal) plant. Bypass Chlorination (disinfection) Recycled water from sludge extraction process Moderate Rare 3 - Low Organic Treatment: Dosed low pressure Matter - Runoff sand filter; RO filtration; Surface water sources are likely. Bores Continued monitoring and systems 5 Source Suspende Seasonal (including dam Moderate Likely 12 - High Confident Chlorination. with tannins. improvement required d & turnover) Chlorination in all Dissolved plants(disinfection) Moderate Rare 3 - Low Treatment: Dosed low pressure Barium, Boron, Chromium, sand filter; RO filtration Manganese, Molybdenum, SNAP test results show some issues Continued monitoring and systems 6 Source Metals Moderate Likely 12 - High Confident Periodic monitoring program Nickel, lead and Metals monitored regularly improvement required to determine possible poor Others performance. Moderate Rare 3 - Low Found in concentrations well below Periodic monitoring program Chlorate ADWG. Continued monitoring and systems 7 Reticulation Anions Moderate Likely 12 - High Confident to determine possible poor Others By product of dosing hypo to maintain improvement required performance. high chlorine residuals from plant due to Moderate Rare 3 - Low EWSQ040 Page 145 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

ID Treatment Conse- Likeli- Maximum Uncert- Existing Preventive Conse- Likeli- Maximum Hazard Source Comments Comments/Further Actions # Phase quence hood Risk ainty Measures quence hood Risk direct feed into reticulation.

Treatment: Dosed low pressure Fertilizers (cropping) sand filter; RO filtration; Septic systems / STPs 9 - Continued monitoring and systems 8 Source Arsenic Moderate Possible Kilkivan > 10% of limit. Reliable Periodic monitoring program Mining Activities Medium improvement required to determine possible poor Old Cattle Dips performance. Moderate Rare 3 - Low Total RO , blended product to Hardness 9 - Continued monitoring and systems 9 Source Dissolved Moderate Possible Depends on Raw water blend Reliable prevent too much softness. Salinity Medium improvement required Solids Monitored Moderate Rare 3 - Low Seasonal events are evident from the water quality data. These occur in dam Runoff Mangane 8 - turnover, flooding, significant rainfall, low Treatment: Dosed low pressure Continued monitoring and systems 10 Source Groundwater / soil Minor Likely Confident se Medium rainfall. sand filter; RO filtration; improvement required Old mines There are so many possible causes that it is not always clear. Minor Rare 2 - Low Seasonal events are evident from the Soil Make-up water quality data. These occur in dam Treatment: Dosed low pressure Runoff Almost 6 - Continued monitoring and systems 11 Source Iron Insignificant turnover , flooding, significant rainfall, Confident sand filter; RO filtration; Lake stratification Certain Medium improvement required low rainfall. There are so many possible Chlorination. Lake roll over causes that it is not always clear. Insignificant Rare 1 - Low Chemically treating bores Growth of bacteria in the (Envirobore),Sand filtration Iron 6 - May occur in bore holes where iron Continued monitoring and systems 12 Source bore, can occur in Minor Possible Confident removes particles. Maintain Bacteria Medium content in source water is higher. improvement required reticulation system chlorine residual. Raw water colour is indicative. Minor Rare 2 - Low Cyanotox Most catchments do not include danger RO and source management Continued monitoring and systems 13 Source Toxic algal blooms Moderate Rare 3 - Low Confident ins zones for algae blooms used in this plant. Moderate Rare 3 - Low improvement required

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14.3.7 Table: Existing and Proposed Preventative Measures for Rainbow Beach ID Treatmen Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # t Phase quence hood Risk ainty quence hood Risk Assume that there is always Bacteria is in the source water. Treatment processes sufficient to Wastewater treatment plants Cattle can access the river, its almost protect customers Closed system pH correction, Septic tanks in catchment certain the they contaminate the water Cannot lower an initial Bacteria filtration and chlorination. Stock & Wildlife Almost 25 - with bacteria. Other animals may also "catastrophic" consequence to any 1 Source (E. Coli, Catastrophic Certain Disinfection (chlorination) Animal Contamination of Certain Extreme contaminate water. lower than "medium" level residual etc) Procedures in place to protect Reservoirs /Plants A number of townships within the risk. from bypass events Bypass catchments are not sewered. System of Continued monitoring and systems monitoring septic systems cannot be improvement required. relied upon. Catastrophic Rare 6 - Medium Assume that there is always Bacteria is in the source water. Treatment processes sufficient to Wastewater treatment plants Cattle can access the river, its almost Closed system pH correction, protect customers Septic tanks in catchment certain the they contaminate the water filtration and chlorination. Cannot lower an initial Stock & Wildlife 20 - with bacteria. Other animals may also 2 Source Viruses Catastrophic Likely Certain Disinfection (chlorination) "catastrophic" consequence to any Animal Contamination of Extreme contaminate water. Procedures in place to protect lower than "medium" level residual Reservoirs /Plants A number of townships within the from bypass events risk. Bypass catchments are not sewered. System of Continued monitoring required. monitoring septic systems cannot be relied upon. Catastrophic Rare 6 - Medium Assume that there is always Bacteria is in Wastewater treatment plants the source water. Treatment processes sufficient to Septic tanks in catchment Cattle can access the river, its almost protect customers Stock & Wildlife certain the they contaminate the water Closed system pH correction, Cannot lower an initial Animal Contamination of 20 - with bacteria. Other animals may also filtration . "catastrophic" consequence to any 3 Source Protozoa Catastrophic Likely Certain Reservoirs /Plants Extreme contaminate water. Procedures in place to protect lower than "medium" level residual Bypass A number of townships within the from bypass events risk. Recycled water from sludge catchments are not sewered. System of Continued monitoring and systems extraction process monitoring septic systems cannot be improvement required. relied upon. Catastrophic Rare 6 - Medium Closed system pH correction, Barium, Boron, Chromium, filtration and chlorination. SNAP test results show some issues Continued monitoring and systems 4 Source Metals copper, lead, manganese, Moderate Likely 12 - High Confident Periodic monitoring program Metals monitored regularly improvement required nickel and others to determine possible poor performance. Moderate Rare 3 - Low Coagulation, sedimentation, filtration, pH correction Soil Make-up Almost Sedimentation will remove Continued monitoring and systems 5 Source pH Lack of buffering in raw Minor 10 - High Correction always required Confident Certain insoluables improvement required water Filters establish a coating that removes Fe Insignificant Rare 1 - Low Total Monitored at all plants and Hardness 9 - Continued monitoring and systems 6 Source Dissolve Moderate Possible Limited impact on most networks Reliable treatment as described for Salinity Medium improvement required d Solids each plant Moderate Rare 3 - Low Closed system pH correction, filtration and chlorination. Runoff Mangan 8 - Sedimentation will remove Continued monitoring and systems 7 Source Groundwater / soil Minor Likely Present in bore water Confident ese Medium insoluables improvement required Old mines Filters establish a coating that removes Mn Minor Rare 2 - Low Soil Make-up Closed system pH correction, Runoff Almost 6 - filtration and chlorination. Continued monitoring and systems 8 Source Iron Insignificant Present in bore water Confident Lake stratification Certain Medium Filters establish a coating that improvement required Lake roll over removes Fe Insignificant Rare 1 - Low

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14.3.7 Table: Existing and Proposed Preventative Measures for Tin Can Bay Cooloola Cove

ID Treatmen Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # t Phase quence hood Risk ainty quence hood Risk Assume that there is always Bacteria is in Treatment processes the source water. sufficient to protect Wastewater treatment plants Cattle can access the river, its almost customers Septic tanks in catchment certain the they contaminate the water Coagulation, sedimentation, filtration, pH Cannot lower an initial Bacteria Stock & Wildlife Almost 25 - with bacteria. Other animals may also correction and disinfection "catastrophic" consequence 1 Source (E. Coli, Catastrophic Certain Animal Contamination of Certain Extreme contaminate water. Procedures in place to protect from bypass to any lower than "medium" etc) Reservoirs /Plants A number of townships within the events level residual risk. Bypass catchments are not sewered. System of Continued monitoring and monitoring septic systems cannot be 6 - systems improvement relied upon. Catastrophic Rare Medium required. Assume that there is always Bacteria is in Treatment processes the source water. sufficient to protect Wastewater treatment plants Cattle can access the river, its almost customers Septic tanks in catchment certain the they contaminate the water Coagulation, sedimentation, filtration, pH Cannot lower an initial Stock & Wildlife 20 - with bacteria. Other animals may also correction and disinfection 2 Source Viruses Catastrophic Likely Certain "catastrophic" consequence Animal Contamination of Extreme contaminate water. Procedures in place to protect from bypass to any lower than "medium" Reservoirs /Plants A number of townships within the events level residual risk. Bypass catchments are not sewered. Continued monitoring System of monitoring septic systems 6 - required. cannot be relied upon. Catastrophic Rare Medium Assume that there is always Bacteria is in Treatment processes Wastewater treatment plants the source water. sufficient to protect Septic tanks in catchment Cattle can access the river, its almost customers Stock & Wildlife certain the they contaminate the water Coagulation, sedimentation, filtration, pH Cannot lower an initial Animal Contamination of 20 - with bacteria. Other animals may also correction "catastrophic" consequence 3 Source Protozoa Catastrophic Likely Certain Reservoirs /Plants Extreme contaminate water. Procedures in place to protect from bypass to any lower than "medium" Bypass A number of townships within the events level residual risk. Recycled water from sludge catchments are not sewered. Continued monitoring and extraction process System of monitoring septic systems 6 - systems improvement cannot be relied upon. Catastrophic Rare Medium required. Organic Runoff Continued monitoring and Matter - Surface water sources are likely. Bores Coagulation, sedimentation, filtration, pH 4 Source Seasonal (including dam Moderate Likely 12 - High Confident systems improvement Suspende with tannins. correction and disinfection turnover) required d Moderate Rare 3 - Low Coagulation, sedimentation, filtration, pH Barium, Boron, Chromium, Continued monitoring and SNAP test results show some issues correction 5 Source Metals copper, lead, manganese, Moderate Likely 12 - High Confident systems improvement Metals monitored regularly Periodic monitoring program to determine nickel and others required possible poor performance. Moderate Rare 3 - Low Soil Make-up Coagulation, sedimentation, filtration, pH Continued monitoring and Tannin in Water Almost correction 6 Source pH Minor 10 - High Correction always required Confident systems improvement Lack of buffering in raw Certain Sedimentation will remove insoluables required water Filters establish a coating that removes Fe Insignificant Rare 1 - Low Treatment: Dosing to promote coagulation, Total followed by high pressure sand media Continued monitoring and Hardness Possibl 9 - 7 Source Dissolved Moderate Limited impact on most networks Reliable filtration. systems improvement Salinity e Medium Solids Periodic monitoring program to determine required possible poor performance. Moderate Rare 3 - Low Seasonal events are evident from the Coagulation, sedimentation, filtration, pH Runoff water quality data, flooding, significant Continued monitoring and Manganes 8 - correction 8 Source Groundwater / soil Minor Likely rainfall, low rainfall. Confident systems improvement e Medium Sedimentation will remove insoluables . Old mines There are so many possible causes that it required Filters establish a coating that removes Mn is not always clear. Minor Rare 2 - Low

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ID Treatmen Conse- Likeli- Maximum Uncert- Conse- Likeli- Maximum Hazard Source Comments Existing Preventive Measures Comments/Further Actions # t Phase quence hood Risk ainty quence hood Risk Seasonal events are evident from the Soil Make-up Coagulation, sedimentation, filtration, pH water quality data. These occur in dam Continued monitoring and Runoff Almost 6 - correction 9 Source Iron Insignificant turnover , flooding, significant rainfall, Confident systems improvement Lake stratification Certain Medium Sedimentation will remove insoluables low rainfall. There are so many possible required Lake roll over Filters establish a coating that removes Fe causes that it is not always clear. Insignificant Rare 1 - Low

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14.4 Operation and Maintenance Procedures All procedures are developed by and reviewed by the operational staff of the Treatment Plant, the Treatment Plant Technical Officer, WH&S Officer and the Document Controller. They are not implemented until all relevant people have agreed on the procedure. They are distributed in hard copy as well as via Council’s intranet. Controlled documents may only be published with the approval of the General Manager of Water and Sewerage Branch.

All procedures mentioned in the Hazard Assessment are currently scheduled for review, as detailed in the ‘Risk Management Improvement Program’.

Quality procedures are summarised below, and are available on Council’s intranet, which extends to each plant.

The full list of procedures available on the Gympie Regional Council Intranet that are relevant to Water Treatment and Water Quality are presented in Appendix 2.

The full Quality Plans for all plants are presented in the Appendices. These contain all parameters for operational testing and reporting on a plant-by-plant basis.

14.5 Quality Procedures 14.5.1.1 Summary of Quality Procedures Document Title Description Date of last Target revision Revision Date The quality manual which applies to all activities carried out by the Water & Sewerage Branch Division. Detailing

Quality Management System, 28/06/2016 Water & Sewerage Branch Quality 20/10/2010 WS-Q-001 Management Responsibility, Manual Resource Management, Product and Service Requirements, Monitoring and Measurement. WS-Q-002 Management Review Structure Organisational Chart 23/2/2010 28/06/2016 Water & Sewerage Branch Quality Document Control WS-Q-003 24/2/2010 28/06/2016 Numbering System Numbering System Details controls on WS-Q-004 Document and Record Control documentation types, and 20/10/2010 28/06/2016 the personnel responsible Jones Hill WTP Quality Plan WS-Q-101 5/5/2010 28/06/2016 (Gympie WTP) Outlines quality management Tin Can Bay / Cooloola Cove WTP requirements for the Scheme WS-Q-301 20/10/10 28/06/2016 Quality Plan • Water Quality Parameters WS-Q-351 Rainbow Beach WTP Quality Plan • Water Quality Testing 20/10/10 28/06/2016 WS-Q-501 Imbil WTP Quality Plan • Operations 16/12/10 28/06/2016 WS-Q-541 Kandanga WTP Quality Plan • Maintenance 16/12/10 23/12/2016 WS-Q-571 Amamoor WTP Quality Plan • Contingencies 20/10/10 23/12/2016 WSQ700 Kilkivan WTP Quality Plan 20/12/2012 20/12/2016

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Document Title Description Date of last Target revision Revision Date WSQ750 Goomeri WTP Quality Plan 20/12/2012 20/12/2016

The full list of procedures available on the Gympie Regional Council Intranet that are relevant to Water Treatment and Water Quality are presented in Appendix 2.

The Reticulation system Work Method Statements / Work Instructions need to be formalised.

14.6 Verification Monitoring Program The respective Treatment Plant Quality Plans present in detail the operational water quality testing carried out for each system and the schedule for carrying these out. The Procedure for Collecting Drinking Water Samples (COMP201), references the procedure for collecting and handling all verification samples as summarised below. All locations for testing are clearly identified in tat document.

The Water & Sewerage External Test Matrix (WSS001) also extends details schedules for verification testing for the next five years.

14.6.1 Frequency of Drinking Water Sampling Analysis Microbiological Analysis Standard Chemical Analysis Standard Metals Screening (Thermo-tolerant Coliforms & E coli) Frequency Refer to Six-Monthly Annually Table 14.6.2 Sampling Treated water only: All Treated water: All water Treated water: All water Locations water treatment plants treatment plants; and Raw treatment plants; and Raw and other specified water: All water treatment water: All water treatment locations plant raw water intakes plant raw water intakes

14.6.2 Monthly Drinking Water Sampling Frequency – Microbiological System Week 1 Week 2 Week 3 Week 4 Week 5 Gympie X 6 X 1 X 1 X 1 X 1 Rainbow Beach X 3 X 1 X 1 X 1 X 1 Tin Can Bay / Cooloola Cove X 5 X 1 X 1 X 1 X 1 Amamoor X 2 Imbil X 2 Kandanga X 2 Kilkivan X 2 Goomeri X 2

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14.6.3 Schedule for rotation of drinking water sampling sites Site Code Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec G2 1 1 1 1 1 1 G5 1 1 1 1 G6 1 1 1 1 G7 1 1 1 1 G8 1 1 1 1 G9 1 1 1 1 G10 1 1 1 1 G11 1 1 1 1 1 1 R2 1 1 1 1 1 1 R3 1 1 1 1 1 1 C2 1 1 1 1 1 1 C3 1 1 1 1 1 1

14.6.4 Drinking Water Sampling Sites – Microbiological Site Sample Location Description Monthly or Code Rotated GYMPIE G1 Dalee Street Pump Station, Jones Hill Tap in right hand corner of compound on M top of pipe work G2 Lindsay Street Reservoir – Lindsay Street, Tap on outside wall of valve pit R Southside G3 Ferguson Hill Low Level Reservoirs – Old Tap in front of low level reservoir M Maryborough Road, Gympie G4 Attie Sullivan Park – Mary Valley Road, Jones Hill Tap in front of sheltered picnic tables M G5 Sewage Pump Station – Smith Road, Gympie Tap on side of power pole behind the R pump station G6 Lehman Oval – Stanley Street, Gympie Tap in front of Lehman Oval sign R G7 Memorial Park – Young Street, Gympie Tap on back wall of parks & Gardens R nursery near car park G8 Parsons Road Park, Parsons Road, Gympie Tap on side of power pole in front of park R sign G9 Thurecht Park – Pine Street, Gympie Tap on side of Thurecht Park sign R G10 Andrew Fisher Memorial Park – Cogan Street, Tap along Cogan St out in open just R Gympie along from sign G11 Exhibition Road, Southside – cnr Ramsey Road Tap out the front of the toilet block R KILKIVAN KL1 7 Hall Road, Kilkivan Tap around back of the house, beside M tank stand KL2 Council Workshop, Bligh Street, Kilkivan Tap front left hand side of workshop M shed. RAINBOW BEACH R1 Rainbow Beach Water Treatment Plant – Tap on exterior of control room M Rainbow Beach Road R2 Laurie Hanson Park – Kirchner Avenue, Rainbow Tap in middle of park (behind toilet R Beach block) R3 Kurana Street, Rainbow Beach Tap in parkland behind IGA complex R TIN CAN BAY / COOLOOLA COVE C1 Tin Can Bay/Cooloola Cove Water Treatment Tap on back wall of control room M Plant – Queen Elizabeth Drive building C2 Queen Elizabeth Drive, Cooloola Cove – near Tap on balustrade of picnic bench at R Nautilus Drive parkland behind convenience store

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Site Sample Location Description Monthly or Code Rotated C3 Mauretania Drive, Cooloola Cove Tap in parkland adjacent to playground R T1 Lions Park – Tin Can Bay Road Tap on side of toilet building M T2 Tin Can Bay Depot – Coral Trout Drive Tap on corner of workshop building M GOOMERI GM1 Goomeri Hall of Memory – 17 Boonara Street, Tap under the front of the building M Goomeri between the two sets of stairs GM2 Qld Rural Fire Brigade Shed, Moore Street, Tap on front right hand corner of M Goomeri building IMBIL I1 Pump Station, Imbil Showgrounds Tap next to Pump Station M I2 Memorial Park – Yabba Road Tap on island closest to Memorial M KANDANGA K1 Brice Street, Kandanga Tap behind Unit 1 M K2 Kandanga Hall – Main Street Tap on corner of building M AMAMOOR A1 Amamoor Reservoir, School House Rd Tap at the bottom of the Reservoir M A2 Amamoor Hall – Busby Street Tap on front left corner of building M

14.6.5 Microbiological Sampling Logic Microbiological sampling and monitoring of Chlorine Residual levels are closely related and therefore occur at the same locations. Locations are selected by the General Manager of Water and Sewerage, based on characteristics of the reticulation network. Sites are chosen that are representative of the worst likely scenarios within a network for the above parameters. That is, areas that are near dead-ends in the network, which might promote extended retention times; low areas which might encourage build-up of extraneous matter and thereby affect water quality; sections that are a long way from disinfection points, providing more time for residuals to be used up and microorganisms to enter the system and populations to develop; etc..

Standard drinking water analysis and minerals testing occur at the same locations as the above for convenience.

14.6.5.1 Microbiological and Drinking Water Quality Sampling Requirements by Scheme Gympie: Ten (10) samples collected monthly. Of these sites - • Three (3) sampling sites (identified by Water and Sewerage Branch General Manager) are to be sampled every month; and • The other three (3) sampling sites are to be sampled on a rotation basis.

Cooloola Coast: Fourteen (14) samples collected monthly: • Eight (8) at Tin Can Bay and Cooloola Cove (three fixed sites & one rotated); and • Six (6) at Rainbow Beach (one fixed & one rotated site).

Mary Valley: Six (6) samples collected monthly (all fixed sites).

Western Townships: At least four (4) samples collected monthly (all fixed sites) EWSQ040 Page 153 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

14.6.6 Table: Amamoor Water Quality Testing Frequency Parameter Treated water from Raw/source water Transmission Reticulation water treatment plant Microbiological Escherichia coli M Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine W W Trihalomethane E Hy Aesthetic True Colour M W Hy Turbidity M W Hy pH M W Hy Alkalinity Hy E Hy Hardness Hy M Hy Total Dissolved Solids (TDS) Hy E Hy Component anions and cations Hy E Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E

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Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

14.6.7 Table: Goomeri Water Quality Testing Frequency Parameter Treated water from Raw/source water Transmission Reticulation water treatment plant Microbiological Escherichia coli E Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine W W Trihalomethane E Hy Aesthetic True Colour M W Hy Turbidity M W Hy pH M W Hy Alkalinity Hy E Hy Hardness Hy M Hy Total Dissolved Solids (TDS) Hy E Hy Component anions and cations Hy E Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy

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Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

14.6.8 Table: Gympie Water Quality Testing Frequency Treated water from Parameter Raw/source water water treatment Transmission Reticulation plant Microbiological Escherichia coli E Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine D W Trihalomethane M Aesthetic True Colour D D Hy Turbidity D D Hy pH D D Hy Alkalinity D F Hy Hardness F F Hy Total Dissolved Solids (TDS) Hy Hy Component anions and cations Hy Hy

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Iron/Manganese F F Hy Aluminium Hy Hy Taste and odour compounds E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

14.6.9 Table: Imbil Water Quality Testing Frequency Treated water from Parameter Raw/source water water treatment Transmission Reticulation plant Microbiological Escherichia coli M Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine W W Trihalomethane E Hy Aesthetic True Colour M W Hy Turbidity M W Hy

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pH M W Hy Alkalinity Hy E Hy Hardness Hy M Hy Total Dissolved Solids (TDS) Hy E Hy Component anions and cations Hy E Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

14.6.10 Table: Kandanga Water Quality Testing Frequency Treated water from Parameter Raw/source water water treatment Transmission Reticulation plant Microbiological Escherichia coli M Giardia E E E Cryptosporidium E E E Other

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Disinfection Residual Chlorine W W Trihalomethane E Hy Aesthetic True Colour M W Hy Turbidity M W Hy pH M W Hy Alkalinity Hy E Hy Hardness Hy M Hy Total Dissolved Solids (TDS) Hy E Hy Component anions and cations Hy E Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

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14.6.11 Table: Kilkivan Water Quality Testing Frequency Treated water from Parameter Raw/source water water treatment Transmission Reticulation plant Microbiological Escherichia coli E Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine W W Trihalomethane E Hy Aesthetic True Colour M W Hy Turbidity M W Hy pH M W Hy Alkalinity Hy E Hy Hardness Hy M Hy Total Dissolved Solids (TDS) Hy E Hy Component anions and cations Hy E Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E

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Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

14.6.12 Table: Rainbow Water Quality Testing Frequency Treated water from Parameter Raw/source water water treatment Transmission Reticulation plant Microbiological Escherichia coli M Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine D W Trihalomethane Hy Aesthetic True Colour M W Hy Turbidity M W Hy pH M W Hy Alkalinity M M Hy Hardness M M Hy Total Dissolved Solids (TDS) Hy E Hy Component anions and cations Hy E Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant

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Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

14.6.13 Table: Tin Can Bay / Cooloola Cove Water Quality Testing Frequency Treated water from Parameter Raw/source water water treatment Transmission Reticulation plant Microbiological Escherichia coli M Giardia E E E Cryptosporidium E E E Other Disinfection Residual Chlorine D W Trihalomethane Hy Aesthetic True Colour D D Hy Turbidity W W Hy pH D D Hy Alkalinity W W Hy Hardness Hy M Hy Total Dissolved Solids (TDS) Hy Hy

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Component anions and cations Hy Hy Iron/Manganese M M Hy Aluminium Hy M Hy Taste and odour compounds E E E Health Related Contaminant Fluoride Hy Hy Nitrate/Nitrite Hy Hy Metals Y Y Arsenic Y Y Disinfection by products E E E Pesticides E E E Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E D = Daily F = Fortnightly Q = Quarterly Hy = Half Yearly E = Event Related Frequency Key: W = Weekly M = Monthly Y = Yearly C = Continuous (Online) O = Other

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14.7 Management of Incidents and Emergencies The Quality Plans presented in the Appendices detail the procedures for managing specific incidents and emergencies.

The Site Based Management Plans for each for the Water Treatment Plants detail the emergency response as follows:

Taking the initial emergency action on-site is the responsibility of site personnel involved in or witnessing the emergency, under the direction of the Operator in Charge. In the event of an emergency situation, the Operator will immediately notify the Superintendent of Treatment Plants and the Reporting and Treatment Plant Technical Officer of any event with the potential to result in environmental harm, or which could involve a threat to public safety.

All excedences to ADWG health guidelines shall be reported to DEWS in the prescribed manner and time period. All monitoring (Operational and Verification) will be reported to DEWS annually, including incidents and actions taken in response thereto.

Details of the responsibility for management of emergency responses are provided in the Table below.

14.7.1 Table: Emergency Protocols Position Responsibility CEO External communications. Director of Engineering Services Notification and reporting to the CEO, Council and other relevant internal parties General Manager, Devise long-term response strategies onsite. Water & Sewerage Branch Document and assess emergency event and failure response. Notify Authorities of emergencies. Operations Manager- Infrastructure Notification of General Manager, Water & Services Directorate Sewerage Branch. Short term emergency response. Repairs to networks. Manager- Treatment & Compliance and/or Notification of General Manager, Water & Treatment Plant Superintendent, Water & Sewerage Branch. Short term emergency Sewerage Branch response. Event logging of the emergency event. Environmental Health Officer- Health & Verification Monitoring and reporting to Environmental Services Branch- Planning General Manager and Manager-Treatment & Directorate Compliance - Water & Sewerage Branch Plant Operator-In-Charge or Immediate emergency response. Plant Operator Notification of Emergency Services.

Definition of Incident/Emergency Levels is shown in Table 14.7.3. Management of each Incident is shown in 14.7.2

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14.7.2 Table: Incident / Emergency Levels Incident / Emergency Description of level level Level 5 • Widespread outbreak of waterborne disease • Declared disaster • Supply unable to be maintained • Gross Excedences of ADWG health guideline values for a chemical parameter (e.g. more than five times the ADWG health guideline limit). Level 4 • Confirmed high level of e. coli (e.g. > 5 CFU/ 100 mL) or any pathogens detected in reticulation • Failure of infrastructure (severe or emergency level supply restrictions required to ensure continuity of supply) Level 3 • Confirmed detection of 1-5 CFU/100 mL E. coli in reticulation • Failure of infrastructure (ability to supply water compromised – short term water restrictions may be required) • Minor Excedences of ADWG health guideline value for chemical parameter (determined value is close to guideline value). Level 2 • Failure of infrastructure or source supply (water quality or supply unlikely to be compromised) with alternate process available to provide drinking water • Excedences of ADWG aesthetic guideline (customer complaints possible) Level 1 • Excedences of operational limit managed through operational and maintenance procedures

14.7.3 Management of Incidents and Emergencies Level Incident or Summary of actions to be taken Position/s emergency (with documented procedure listed) responsible for Action/s Excedence of • Retest to verify. 1 Operational • Follow Quality Plan sub-documents (see below). Operator Limit • Raise a CAR (Corrective Action Request) Operator • (refer to W&S Quality Plan and links in the Operator Appendices) Operator • Forward to Manager- Treatment & Compliance • Assess changes that may be advised to procedures Manager- Treatment & and/or operationally Compliance Aesthetic • Customer complaints recorded on Job Sheet WSF001 Council Officer 2 guideline • Investigate issue, fix. Operator and breached o Raise a CAR (Corrective Action Request) Treatment Plant o (refer to W&S Quality Plan and links in the Superintendent Appendices) (aesthetic) o Forward to Manager- Treatment & Manager- Compliance Treatment & o Assess changes that may be advised to Compliance procedures and/or operationally • Test water if required, both at the site and in nearby mains. • Notify General Manager, Water & Sewerage Branch • Incident recorded, tracked and reported against Customer Service Standards for Water & Sewerage

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Level Incident or Summary of actions to be taken Position/s emergency (with documented procedure listed) responsible for Action/s Branch (available on the internet) 2 Minor service • Customer complaints recorded on Job Sheet WSF001 Council Officer interruption • Investigate issue, fix. Notify customers of supply Plumber and interruption where appropriate. Operations For example, Manager leak. • Notify General Manager, Water & Sewerage Branch Operations Manager • Incident recorded, tracked and reported against Manager- Treatment & Customer Service Standards for Water & Sewerage Compliance Branch (available on the internet) 3 Health • Customer complaints recorded on Job Sheet WSF001 Council Officer guideline • Notify W&S Branch (Verification Monitoring) Environmental Health breached Officer • Notify General Manager, Water & Sewerage Branch Manager- Treatment & Compliance Operational Operator, EHO and testing; • Investigate issue, fix. Treatment Plant Verification • Test water if required, both at the site and in nearby Superintendent Testing; Boil mains General Manager, Water Incident • Incident Management by personnel per Table 14.7.1., Water & Sewerage including issue of boil water or other notice as Branch required. Manager- Treatment & • Incident recorded, tracked and reported against Compliance Customer Service Standards for Water & Sewerage Branch (available on the internet) • All excedences to ADWG health guidelines shall be reported to DEWS in the prescribed manner and time period. 3 Major supply • Customer complaints recorded on Job Sheet WSF001 Council Officer interruption • Notify General Manager, Water & Sewerage Branch Operations Manager • Notify customers of supply interruption where Operations Manager appropriate. and Plumber • Investigate issue, fix. For example, • Incident recorded, tracked and reported against Manager- Treatment & breakage Customer Service Standards for Water & Sewerage Compliance identified Branch (available on the internet) 4 & 5 All other issues Managed by personnel per Table 14.7.1, with reference to the Local Disaster Management Plan Quality Documentation. All excedences to ADWG health guidelines shall be reported to DEWS in the prescribed manner and time period.

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15 Risk Management Improvement Program

15.1 Summary of all proposed preventative measures From the Hazard Identification and Risk Assessments, here is a summary of all proposed preventative measures.

15.1.1 All Schemes: • Record the system and create a written formal procedure for capturing water quality complaints; • Develop a system to monitor supply quality of treatment chemicals, with the aim of maintaining a register; • Provide online continuous monitoring for Chlorine Residual (to ensure disinfection) and Turbidity (to ensure filter breakthrough has not occurred) at all plants; • Review inspection, cleaning and routine maintenance schedules and procedures for reservoirs; • Review requirements for alarming of chlorine / poly dosing pump failures; • Review communication protocols with emergency departments, requesting alerts for any activity in the area; • Monitor the results of filter media changes, especially concerning monitoring of Mn and Fe values; • Review and document frequency of pesticide analysis for Schemes (eg. Programmed and event-based); • Review frequency and document SWA on raw, treated and reticulated water for the Schemes; • Review frequency of testing for potentially toxic cyanobacteria species during high risk seasons where applicable; • Review reticulation repair procedures, work method statements and work instructions and equipment cleansing for cross-contamination with sewage; • Revise and implement Site Based Management Plans for each site, with Emergency Response. • Instigate a system and formal procedure for sampling and testing reticulated water supplies for disinfection by-products; and • Review the storage of Sodium Hypochlorite to ensure shelf life, reducing degradation of the disinfection efficiency of the liquid, as well as taste and odour by-products of degradation. • Review frequency of fluoride testing in schemes where fluoride is dosed for medication.

15.1.2 For Goomeri / Kilkivan: • A review of the procedure which prevents the plant bypass to be used accidentally. • At Goomeri, develop a procedure for proportion of source water from bores and off-stream storage, with particular consideration of the water softener; • Review and implement a Quality Plan for Kilkivan and Goomeri Water Treatment Plants; • At Kilkivan, develop a procedure for proportion of source water from bores and off-stream storage, with particular consideration of blue green algal toxins, salinity and hardness; and • Develop a program for test for blue green algae and possible toxins at Goomeri and Kilkivan off-stream storage; and • Review frequency of testing for metals, especially those with historical data in the Schemes. • Establish regular and flood event-based testing program for Cyanide. • Engage in monitoring program for each source separately. To be followed by review of risk assessment for each source

15.1.3 For Mary Valley (Amamoor, Kandanga and Imbil): • Review frequency of testing for metals, especially those with historical data in the Imbil Scheme • A review of the procedures for plant bypassing and backwashing filters. Further work is required to install physical barriers, alarms and interlocks to ensure the raw water does not enter the reticulation system without adequate filtering and disinfection; • As flooding in the Mary Valley prevents access to all of these Water Treatment Plants, automation of the backwash process and remote monitoring of chlorine residuals and turbidity of the treated water will be implemented; and • Review specifications for pre-Chlorination for effective oxidation at all Mary Valley Plants.

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15.1.4 For Gympie: • A plant bypass has never been used but stills exists, Resolve procedures to prevent unauthorised opening and install physical barriers for the Bypass. • Review frequency of testing for metals, especially those with historical data in the Scheme; and • Review maintenance frequency and procedures on Fluoride Dosing, including calibrations.

15.1.5 For Cooloola Coast (Tin Can Bay / Cooloola Cove, Rainbow Beach): • At the Rainbow Beach Water Treatment Plant, the plant bypass can be opened between bore field and the reticulation system. The possibility for leakage or unauthorised opening requires a review of the procedural and physical barriers for the Bypass; • At the Cooloola Cove Water Treatment Plant, the major process steps of sedimentation and filtering can be bypassed. The possibility for leakage or unauthorised opening requires a review of the procedural and physical barriers for the Bypass; • A review of the procedures and training of staff for flood protection at Rainbow Beach. This includes operating valves to ensure they can be closed at short notice; • At Cooloola Cove Water Treatment Plant, review maintenance frequency and procedures on Fluoride Dosing, including calibrations; and • Review requirements for flow switch on Clearwater at Cooloola Cove Water Treatment Plant before post dosing begins.

15.2 Risk Management Improvement Program Timetable Using the identified proposed preventative measures, the following Risk Improvement Programs have been created.

15.2.1 Risk Management Improvement Program, All Schemes Complete By Proposed Preventative Measure Priority Responsibility END of: Review the system and formal procedure for capturing water General Manager, Water Low Dec 2016 quality complaints; & Sewerage Branch Develop a system to monitor supply quality of treatment Manager- Treatment & Medium Jun 2016 chemicals, with the aim of maintaining a register; Compliance Review requirement for online continuous monitoring for Manager- Treatment & Chlorine Residual (to ensure disinfection) and Turbidity (to High Complete Compliance ensure filter breakthrough has not occurred) Review inspection, cleaning and routine maintenance Manager- Treatment & Medium Jun 2016 schedules for reservoirs Compliance Review requirements for alarming of chlorine / poly dosing Manager- Treatment & High Jan 2016 pump failures Compliance Review communication protocols with emergency General Manager, Water High Jun 2016 departments, requesting alerts for any activity in the area & Sewerage Branch Monitor the results of filter media changes, especially Manager- Treatment & Low On-going concerning monitoring of Mn and Fe values Compliance Review and document frequency of pesticide analysis for Manager- Treatment & Low Dec 2016 Schemes (eg. Programmed and event-based) Compliance Review frequency and document SWA on raw, treated and Manager- Treatment & Medium Complete reticulated water for the Schemes Compliance Review frequency of testing for potentially toxic cyanobacteria Manager- Treatment & Medium Complete species during high risk seasons where applicable Compliance Review reticulation repair procedures, work method statements Operations Manager and work instructions and equipment cleansing for cross- High Jun 2016 Infrastructure Services contamination with sewage Revise and implement Site Based Management Plans for each High Jun 2016 Manager- Treatment &

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Complete By Proposed Preventative Measure Priority Responsibility END of: site, with Emergency Response Compliance Instigate a system and formal procedure for sampling and Manager- Treatment & Low Complete testing reticulated water supplies for disinfection by-products Compliance Review the storage of Sodium Hypochlorite to ensure shelf life not exceeded, reducing degradation of the disinfection Manager- Treatment & Medium Complete efficiency of the liquid as well as taste and odour by-products Compliance of degradation. Review frequency of fluoride testing in schemes where fluoride General Manager, Water Low Complete is dosed for medication & Sewerage Branch

15.2.2 Risk Management Improvement Program, Goomeri/Kilkivan

Proposed Preventative Measure Priority Timeframe Responsibility

A review of the procedure which prevents the plant bypass to be Manager- Treatment Medium Jun 2016 used accidentally & Compliance At Goomeri, develop a procedure for proportion of source water Manager- Treatment from bores and off-stream storage, with particular consideration Medium Jun 2016 & Compliance of the water softener Review and implement a Quality Plan for Kilkivan and Goomeri Complete Manager- Treatment High Water Treatment Plants d & Compliance At Kilkivan, develop a procedure for proportion of source water Manager- Treatment from bores and off-stream storage, with particular consideration of Medium Jun 2016 & Compliance blue green algal toxins, salinity and hardness Develop a program for test for blue green algae and possible Manager- Treatment Medium Jun 2016 toxins at Goomeri and Kilkivan off-stream storage & Compliance Review frequency of testing for metals, especially those with Manager- Treatment Low Dec 2016 historical data in the Schemes (Arsenic & Cyanide) & Compliance Engage in review of risk assessment for each source Manager- Treatment Low Jun 2016 & Compliance

15.2.3 Risk Management Improvement Program, Mary Valley (Imbil, Amamoor, Kandanga)

Proposed Preventative Measure Priority Timeframe Responsibility

Review frequency of testing for metals, especially those with Manager- Treatment & Low Dec 2016 historical data in the Imbil Scheme Compliance A review of the procedures for plant bypassing and backwashing filters. Further work is required to install physical barriers, alarms Manager- Treatment & High Complete and interlocks to ensure the raw water does not enter the Compliance reticulation system without adequate filtering and disinfection. As flooding in the Mary Valley prevents access to all of these Water Treatment Plants, automation of the backwash process and Manager- Treatment & High Dec 2016 remote monitoring of chlorine residuals and turbidity of the Compliance treated water will be implemented Review specifications for pre-Chlorination for effective oxidation at Manager- Treatment & Medium Complete all Mary Valley Plants Compliance

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15.2.4 Risk Management Improvement Program, Gympie

Time- Proposed Preventative Measure Priority frame Responsibility

A plant bypass has never been used but still exists, Resolve Jun Manager- Treatment & procedures to prevent unauthorised opening and install physical Medium 2016 Compliance barriers for the Bypass. Review frequency of testing for metals, especially those with historical Dec Manager- Treatment & Low data in the Scheme 2016 Compliance Review maintenance frequency and procedures on Fluoride Dosing, Compl Manager- Treatment & Medium including calibrations. ete Compliance

15.2.5 Risk Management Improvement Program, Tin Can Bay/Cooloola Cove Time- Proposed Preventative Measure Priority frame Responsibility

At the Cooloola Cove Water Treatment Plant, the major process steps of sedimentation and filtering can be bypassed. The possibility for Jan Manager- Treatment & High leakage or unauthorised opening requires a review of the procedural 2016 Compliance and physical barriers for the bypass At Cooloola Cove Water Treatment Plant, review maintenance Compl Manager- Treatment & Medium frequency and procedures on Fluoride Dosing, including calibrations ete Compliance Review requirements for flow switch on Clearwater at Cooloola Cove Jan Manager- Treatment & High Water Treatment Plant before post dosing begins. 2016 Compliance

15.2.6 Risk Management Improvement Program, Rainbow Beach Time- Proposed Preventative Measure Priority frame Responsibility

At the Rainbow Beach Water Treatment Plant, the plant bypass can be opened between bore field and the reticulation system. The Jan Manager- Treatment & High possibility for leakage or unauthorised opening requires a review of 2016 Compliance the procedural and physical barriers for the bypass A review of the procedures and training of staff for flood protection Compl Manager- Treatment & at Rainbow Beach. This includes operating valves to ensure they can High ete Compliance be closed at short notice;

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Service Provider No SP 485

DRINKING WATER QUALITY MANAGEMENT PLAN 2012

APPENDICIES

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16 Water Quality Data

16.1 Amamoor Scheme 1/1/10 – 31/3/12

16.2 Goomeri Scheme 1/1/10 – 31/3/12i

16.3 Gympie Scheme 1/1/10 – 31/3/12

16.4 Imbil Scheme 1/1/10 – 31/3/12

16.5 Kandanga Scheme 1/1/10 – 31/3/12

16.6 Kilkivan Scheme 1/1/10 – 31/3/12

16.7 Rainbow Beach Scheme 1/1/10 – 31/3/12

16.8 Tin Can Bay / Cooloola Cove Scheme 1/1/10 – 31/3/12

16.9 SNAP Testing Results: Metals, Radiological Elements, Pesticides

16.10 Chlorine Residuals – Reticulation 1/1/10 – 31/3/12

16.11 Standard Water Analysis Results (Including SNAP)

16.12 Blue Green Algal Toxins (SNAP)

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17 Water Treatment, Maintenance and Quality Procedures.

17.1 General Comments As Gympie Regional Council operates all eight schemes and associated treatment plants, along with seven sewerage schemes, there are a number of documents within council’s quality systems that apply to all plants and systems. These are included below for simplicity of presentation, as many procedures carry over between them. All are available to operational staff, who have access to them at each plant on a distributive Intranet system. All plants have printers which enable documents to be put into hard copy and operators have a procedural part in initiating and approving changes in documents under the quality system.

POLICIES / GUIDELINES

PRWS002 Building Over Sewers PRWS004 Sewer Connections PRWS005 Water Connections PRWS006 Sewer Main to House Connection Blockages MANAGEMENT PLANS Water Management WSMP130 Water Demand Management Plan WSMP131 Water Sources Management Plan WSMP132 Water Loss Management Plan WSSLMP System Leakage Management Plan WSMP133 Drought Management Plan Environmental Responsibility WSMP140 Environmental Management Plan WSMP141 Effluent Management Plan WSMP142 Sewer Inflow/Infiltration Management Plan WSMP145 Receiving Environmental Monitoring Program (Large file 7.5Mb) Operations Management WSMP150 Sludge/Biosolids Management Plan WSMP151 Trade Waste Management Plan WSMP152 Operations Management Plan WSMP153 Maintenance Management Plan WSMP154 Energy/Resources Management Plan Performance Management WSMP160 Performance Management Plan Site Based Management Plans (SBMP) WSMP210 Gympie Sewerage Treatment Plant SBMP QUALITY WSQ001 Water & Sewerage Quality Manual WSQ002 W&S Management Review Structure WSQ003 Quality Numbering System WSQ004 Document and Records Control WSQ005 Inventory Responsibility WSQ006 Audit / Checklist Form (includes schedule) FSP173 Purchase Orders FSWI192 Stores Issue Gympie Water Scheme WSQ101 Jones Hill WTP Quality Plan

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Coast Water Scheme WSQ301 Tin Can Bay / Cooloola Cove Quality Plan WSQ351 Rainbow Beach Quality Plan Mary Valley Water Scheme WSQ501 Imbil WTP Quality Plan WSQ541 Kandanga WTP Quality Plan WSQ571 Amamoor WTP Quality Plan Western Water Scheme WSQ700 Kilkivan WTP Quality Plan WSQ750 Goomeri WTP Quality Plan PROCEDURES & CONTINGENCY PLANS

WSP001 On Call Procedure WSP003 Laboratory Equipment Calibration Control WSP004 Maintenance Control Procedure WSP006 Procedure for Reporting of Sewer Overflows WSP041 Water Treatment Plant Operation Control WSP042 Water Treatment Process Variations WSP043 Jones Hill Water Treatment Plant Release Testing Standards WSP044 Responding to a Fluoride Incident WSP045 Saturator Fluoride Plant Isolation WSP047 Saturator Fluoride Plant Regulatory Record Keeping Procedure WSP048 Fluoride Safety in WTPs WSP071 Sewage Treatment Plant Effluent Testing Standards WSP072 Groundwater Monitoring Program/Plan WSP075 Flood Management Plan for Water & Sewerage Division Gympie Sewerage Scheme WSP202 Fire & Evacuation Plan - Gympie STP - Widgee Crossing Gympie Water Scheme WSP109 Jones Hill WTP Fire & Evacuation Plan WSCP101 Jones Hill WTP Power Outage WSCP102 Jones Hill WTP Process Failure WSCP103 Jones Hill WTP Emergency Procedure WSCP104 Jones Hill WTP Chlorine Emergency Procedure WSCP105 Jones Hill WTP Flood WSCP106 Jones Hill WTP Drought Coast Sewerage Scheme WSP400 Cooloola Cove STP Fire & Evacuation Plan WSP440 Rainbow Beach STP Fire & Evacuation Plan WSP470 Tin Can Bay STP Fire & Evacuation Plan Coast Water Scheme WSP300 Cooloola Cove WTP Fire & Evacuation Plan WSP350 Rainbow Beach WTP Fire & Evacuation Plan WSCP301 Tin Can Bay/Cooloola Cove WTP Power Outage WSCP302 Tin Can Bay/Cooloola Cove WTP Process Failure WSCP303 Tin Can Bay/Cooloola Cove WTP Emergency Procedure WSCP304 Tin Can Bay/Cooloola Cove WTP Chlorine Emergency Procedure WSCP351 Rainbow Beach WTP Power Outage WSCP352 Rainbow Beach WTP Process Failure WSCP353 Rainbow Beach WTP Emergency Procedure WSCP354 Rainbow Beach WTP Chlorine Emergency Procedure Mary Valley Sewerage Scheme

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Mary Valley Water Scheme WSCP501 Imbil WTP Power Outage WSCP502 Imbil WTP Process Failure WSCP503 Imbil WTP Emergency Procedure WSCP541 Kandanga WTP Power Outage WSCP542 Kandanga WTP Process Failure WSCP543 Kandanga WTP Emergency Procedure WSCP571 Amamoor WTP Power Outage WSCP572 Amamoor WTP Process Failure WSCP573 Amamoor WTP Emergency Procedure Western Sewerage Scheme

Western Water Scheme WSP700 Kilkivan WTP Fire & Evacuation Plan WSP750 Goomeri WTP Fire & Evacuation Plan Reticulation WSP901 Water Main Scouring WSP951 Sewage Reticulation Operation Control WSP952 Removal of Sewers from Cleaning Program WORK METHOD STATEMENTS / WORK INSTRUCTIONS WSWI011 Installing or Retrofitting Water Meters WSWMS001 Movement of Powered Mobile Plant WSWMS002 Work Near Electrical Services WSWMS003 Structural Alteration WSWMS004 Entering a Trench more than 1.5m deep WSWMS005 Working 2m above the ground WSWMS006 Working on a Roof with a Pitch more than 26 degrees WSWMS008 Hazardous Substance WSWMS009 Confined Space WSWMS010 Asbestos Cement Work WSWMS016 Demolition Work WSWMS030 Work on or adjacent to a Road or Railway WSWMS031 In-ground Pipelines Installation WSWMS032 Herbicide Spraying WSWMS071 Manhole Construction WSWMS072 Rodding Machine - Solid Rods Only WSWMS073 Motorised Spring Rods WSWMS074 Electric Eel Operation WSWMS075 Core Holing Manholes WSWMS076 Concreting Manhole Bases WSWMS077 Asbestos Pipework WSWMS078 Sewer Jet Cleaning and Cutting - Plant 748 WSWMS079 Sewer Jet Cleaning and Cutting - Plant 742 Operational & Maintenance WSWI001 Induction: New Or Transferred Outside Work Staff WSWI002 Induction: New or Transferred Treatment Plant Employees WSWI003 Induction: New Or Transferred Office Employees WSWI004 Asset Inventory Program WSWI005 Clearing and Grubbing WSWI006 Stockpiles WSWI007 Site Establishment WSWI008 Provision for Traffic

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WSWI009 Trailer Pre-Start Inspection & Service Procedures WSWI010 Job Sheet Work Instructions WSWI040 Wet Fluoride Spill Clean Up WSWI041 Dry Fluoride Spill Clean Up WSWI042 Loading 25kg Sodium Fluoride Bags WSWI043 Flushing of Saturator Fluoride Dosing System WSWI044 Receiving Sodium Fluoride Deliveries and checking 25kg bags WSWI045 Saturator Fluoride Plant Isolation WSWI046 Fluoride Equipment Clean Down WSWI047 Sampling and Testing Fluoride WSWI070 Pump Station G1, G2,G3,G4, Wet Wells WSWI081 Decommissioning Sewerage Pump Stations During Flood Events Calibration WSC101 W&T Depolox 3Plus Chlorine Residual Analyser WSC102 WTW Inolab pH Meter WSC103 Fischer & Porter pH Standardisation WSC104 ABB Kent-Taylor Turbidity Monitor WSC105 HACH 2100N Turbidimeter WSC106 Kent pH Meter 4535 WSC301 HACH 2100AN Turbidimeter WSC302 ABB 4600 Series pH Transmitter WSC303 HACH 2100AN Turbidimeter for Colour Measurement WSC304 HACH Sension2 pH Meter Laboratory Tests WST101 Laboratory Jar Test WST102 pH - WTW Inolab pH Meter WST103 Turbidity - HACH 2100N Turbidimeter WST104 Alkalinity - Titration Method WST105 Hardness - Titration Method WST106 Chlorine - Lovibond 1000 Comparator WST108 Aluminum - HACH DR5000 Spectrophotometer WST109 Chlorine - HACH DR5000 Spectrophotometer WST110 Colour - HACH DR5000 Spectrophotometer WST111 Fluoride - HACH DR5000 Spectrophotometer WST112 Iron - HACH DR5000 Spectrophotometer WST113 Manganese - HACH DR5000 Spectrophotometer WST114 Suspended Solids HACH DR5000 WST303 Chlorine - HACH 46700-00 Colorimeter WST304 Colour - HACH 2100AN Turbidimeter WST305 Colour - Lovibond 2000 Comparator WST309 Tin Can Bay/Cooloola Cove WTP Jar Tests WST351 pH - Hanna 8521 Laboratory pH Meter WST311 Turbidity - HACH 2100AN Turbidimeter Gympie Water Scheme WSWI101 Daily Duties WSWI103 Plant Operation - Using Multitrode Control WSWI104 Plant Operation - Using Full Manual Control WSWI105 Filter Backwash WSWI106 Belt Press Operation WSWI107 Belt Press Batch Polymer WSWI108 Unloading & Connecting Chlorine Drums WSWI109 Changing Chlorguard Air Cylinder WSWI110 Draining & Filling a Filter

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WSWI111 Draining & Filling Sedimentation Tank WSWI112 Emptying & Filling Clear Water Tank WSWI113 Startup With River in Flood WSWI114 Bypassing Floc & Sed Tank While Still Treating Water WSWI115 JHWTP - Pumping Out the Raw Water Pump Well WSWI116 Jones Hill WTP Shift Duties Gympie Sewerage Scheme WSWI201 Instruction EPCO Clarifier Unit Coast Sewerage Scheme

Coast Water Scheme WSWI301 Connecting 70kg Chlorine Cylinders WSWI302 Tin Can Bay/Cooloola Cove WTP Daily Operational Duties WSWI303 Tin Can Bay/Cooloola Cove WTP Backwash Filter 1 WSWI304 Tin Can Bay/Cooloola Cove WTP Backwash Filter 2 WSWI305 Tin Can Bay/Cooloola Cove WTP Batch Chemicals WSWI306 Tin Can Bay/Cooloola Cove WTP Flush Dosing Lines WSWI307 Tin Can Bay/Cooloola Cove WTP Clean Clarifiers WSWI351 Rainbow Beach WTP Daily Operational Duties WSWI352 Rainbow Beach WTP Backwash Filters WSWI353 Rainbow Beach WTP Batch Chemicals Mary Valley Sewerage Scheme

Mary Valley Water Scheme WSWI501 Operating under Changed Raw Water Conditions WSWI502 Imbil WTP Operational Duties WSWI503 Imbil WTP Backwash Filter WSWI504 Imbil WTP Batch Chemicals WSWI505 Imbil WTP Chlorine Residual Testing WSWI541 Kandanga WTP Operational Duties WSWI542 Kandanga WTP Backwash Filter WSWI543 Kandanga WTP Batch Chemicals WSWI544 Kandanga WTP Chlorine Residual Testing WSWI545 Kandanga Bore Operational Duties WSWI546 Kandanga Bore Batch Chemicals WSWI547 Kandanga Bore Chlorine Residual Testing WSWI571 Amamoor WTP Operational Duties WSWI572 Amamoor WTP Backwash Filter WSWI573 Amamoor WTP Batch Chemicals WSWI574 Amamoor WTP Chlorine Residual Testing Kilkivan Sewerage and Water Scheme

Goomeri Sewerage and Water Scheme

Reticulation

FORMS Divisional WSF001 Job Sheet WSF002 Major Works Plan WSF003 Small Plant Issues EWSQ040 Page 177 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

WSF007 Ecoaccess Overflow Report Template WSF008 Short Quotation Form WSF009 Minor Works Job Sheet WSF010 Application For Conditional Water Restriction Permit www WSF011 Water Meter for Multi Title WSF013 TMP-Partial Footpath Closure (Short Term Work only) WSF015 Works Completed Release Form WSF016 Fax Cover Sheet - Water & Sewerage WSF017 Fitters Job Sheet CSF307 Telephone Message WSF018 Quotation Letter Example WSF019 Internal Report Template WSF070A Application for Discharge of Trade Waste to Sewer Part A WSF070B Application for Discharge of Trade Waste to Sewer Part B WSF071 Initial Report of Sewer Overflow Gympie Water Scheme WSF101 Jones Hill Water Treatment Plant Daily Log Sheet WSF102 Jones Hill WTP Lab Sheet WSF103 Jones Hill WTP Mineral Test Sheet WSF104 Jones Hill WTP Sludge Treatment Log Sheet WSF105 Gympie WSS Chlorine Residual Test Sheet WSF106 Gympie WSS Pump Station Log Sheet WSF107 Jones Hill WTP Treated Water Release Log Sheet WSF108 Jones Hill WTP Fluoride Test Results Gympie Sewerage Scheme WSF201 Gympie STP Log Sheet WSF202 Gympie STP Lab Sheet WSF203 Gympie STP Pump Stations Log Sheet No 1 and No 2 WSF204 Gympie STP Log Sheet Cooloola Coast Water Scheme WSF301 Tin Can Bay/Cooloola Cove WTP Lab Sheet WSF302 Tin Can Bay - Cooloola Cove WTP Flow Record WSF303 Cooloola Coast WTP Iron, Manganese and Aluminum Test Sheet WSF304 Cooloola Coast Chlorine Residual Test Sheet WSF351 Rainbow Beach WTP Lab Sheet WSF352 Rainbow Beach WTP Flow Sheet Cooloola Coast Sewerage Scheme WSF401 Coastal Sewerage Plant Run Sheet WSF402 Cooloola Coast STP Laboratory Sheet Mary Valley Water Scheme WSF501 Mary Valley WTP Log Sheet WSF502 Imbil Township & Hyne Mill Log WSF503 Mary Valley Chlorine Residual Sheet WSF504 Mary Valley Lab & Mineral Test Sheet WSF505 Mary Valley WTP Backwash Lab Sheet Mary Valley Sewerage Scheme WSF631 Imbil Sewage Treatment Plant Operations Log WSF632 Imbil Sewage Treatment Plant Monthly Log WSF633 Imbil STP Effluent Analysis WSF634 Imbil STP Extended Effluent Analysis WSF635 Imbil Irrigation Pond Pumps WSF636 Imbil Sewage Pump Station

EWSQ040 Page 178 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

Western Water Scheme WSF701 Western Water Supply Chlorine Residual Sheet Western Sewerage Scheme

Reticulation WSF950 Sewerage Pumping Stations Power and Hours Meters

REGISTERS / SCHEDULES Operational & Maintenance WSR001 Chlorine Drum/Cylinder Register WSR002 Maintenance Register WSR003 Equipment Failure Register WSR004 Calibration Register WSR005 Asset Register WSR006 Portable and Attractable Items Register WSR007 Plant Register WSR008 Spares Inventory WSR009 Safety Equipment Loan Register WSR010 Plant and Minor Plant Register Water & Sewerage Shed WSR041 Process Variations Register Gympie Sewerage Scheme

Gympie Water Scheme WSS101 Jones Hill WTP Calibration Schedule WSR101 Jones Hill WTP Calibration Register WSR102 Jones Hill WTP Maintenance Register Cooloola Coast Sewerage Scheme

Cooloola Coast Water Scheme WSS301 Tin Can Bay/Cooloola Cove WTP Calibration Register WSS302 Tin Can Bay/Cooloola Cove WTP Maintenance Schedule WSS351 Rainbow Beach WTP Calibration Register WSS352 Rainbow Beach WTP Maintenance Schedule Mary Valley Sewerage Scheme WSS631 Imbil Sewage Maintenance Schedule - Annual Mary Valley Water Scheme WSS501 Mary Valley WTP Maintenance Register Western Water Scheme

Western Sewerage Scheme

Reticulation WSR901 Water Meter Requests Register WSR951 Sewer Camera Survey

INFORMATION WSI002 Water Wise www WSI004 Water Meter Information www WSI005 Water Sprinkler Restrictions www WSI007 W&S Customer Service Pamphlet www EWSQ040 Page 179 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

WSI008 Trade Waste Management Program WSI040 Reticulated Water Meter Requirements WSI070 Information to be supplied with Trade Waste Application WSI072 Trade Waste Inspection Drop Letter WSI110 Interruption to Water Service Notice WSI901 Water Service Area & Associated Infrastructure - Gympie www WSI902 Water Service Area & Associated Infrastructure - Small Towns www WSI951 Residents Notification - Smoke Testing WSI961 Sewerage Service Area & Associated Infrastructure - Gympie www WSI962 Sewerage Service Area & Associated Infrastructure - Small Towns www WSQ002 W&S Management Review Structure WST001 External Quality Testing Matrix

OTHER DIRECTORATES

Planning

PBF041 Water & Sewer Application Form PBF042 Application for Approval to Install Backflow Device Form PBF001 Building Over a Sewer Assessment Report Form Finance FSF369 Water Meter Reading Request Form FSF370 Water Meter Test Form FSP364 Water Metering & Charging of Multi Title Developments Policy Community Services COMP201 Collecting Drinking Water Samples Procedure LDP100 Local Disaster Management Plan Management LDP100 Local Disaster Management Plan

OCP161 Corrective Preventive Action OCF160 Non-Conformance Report/ Corrective Action Request

OCF163 CPA Report Register

WPH&S WHSI034 Emergency Planning Committee - Jones Hill WHSI035 Emergency Planning Committee - Gympie Sewerage Plant

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18 Water & Sewerage Quality Manual

WSQ001.pdf

EWSQ040 Page 181 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 182 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

19 Quality Plan for Amamoor Water Treatment Plant

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EWSQ040 Page 184 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

20 Quality Plan for Jones Hill Water Treatment Plant (Gympie)

EWSQ040 Page 185 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 186 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

21 Quality Plan for Imbil Water Treatment Plant

EWSQ040 Page 187 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 188 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

22 Quality Plan for Kandanga Water Treatment Plant

EWSQ040 Page 189 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 190 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

23 Quality Plan for Rainbow Beach Water Treatment Plant

EWSQ040 Page 191 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 192 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

24 Quality Plan for Kilkivan Water Treatment Plant

EWSQ040 Page 193 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 194 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

25 Quality Plan for Goomeri Water Treatment Plant

EWSQ040 Page 195 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

EWSQ040 Page 196 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

26 Quality Plan for Cooloola Cove Water Treatment Plant

EWSQ040 Page 197 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

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27 Procedure for Collecting Drinking Water Samples

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28 Local Disaster Management Plan

LD-P-100

EWSQ040 Page 200 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.] Drinking Water Quality Management Plan

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29 Universal Key for Plant & Network Diagrams

Universal Diagram Key

Raw Network Valve Pump Water Water Telemetry Station

Process Process Process Valve/ Water Water Water Bore Hydrant

EWSQ040 Page 202 Revised 30/09/2015 Drinking Water Quality Management Plan [Printed copies are uncontrolled. It is the responsibility of each user to ensure that any copies of system documents are the current issue.]