Drinking Water Quality Management Plan 2013 · Drinking Water Quality Management Plan. EWSQ040...

Drinking Water Quality Management Plan

Drinking Water Quality Management Plan 2015

Service Provider No SP 485


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.]

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




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




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




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




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




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


EWSQ040 Page 1 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.]

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]



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 Name

Operator (organisation)

Communities Served

Amamoor

Gympie Regional Council

Amamoor Goomeri Goomeri Gympie Gympie and Southside Imbil Imbil Kandanga Kandanga 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

Scheme Name

Current (2013)

Projected in 10 years

Population served

Connections Demand

ML/d Population

served Connections

Demand 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 / Cooloola Cove

6,212 2,588 1.14 6,860 2,860 1.26

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.



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 Water & Sewerage Branch [Ian Schiefelbein]

Responsible for managing the water treatment and supply for all of Council. Contributed to and reviewed DWQMP, including Risk Assessments. Attended Workshops.

Process Manager Water & Sewerage Branch [Cindy Walker]

Position deleted in Restructure. Compiled and reviewed DWQMP, including Risk Assessments. Attended Workshops.

Manager- Treatment & Compliance Water & Sewerage Branch [Shaun Johnston]

Manages treatment plants, reservoirs, pumping stations and Telemetry. Contributed to, compiled and reviewed DWQMP, including Risk Assessments. Attended Workshops. Author of current Revision.

Treatment Plant Supervisor Water & Sewerage Branch [Ross Gibbs]

Responsible for day-to-day operations at all treatment plants and monitoring programs within reticulation networks. Contributed to DWQMP, including Risk Assessments. Attended Workshops.

Senior Inspector Infrastructure Services (seconded to W&S Branch [Darren Beutel]

Responsible for reticulation asset management and technical support for drinking water within Council. Contributed to and reviewed DWQMP, including Risk Assessments. Attended Workshops.

Manager Maintenance Infrastructure Services [Gus Bartlet]

Responsible for water distribution network infrastructure.

Foreman Infrastructure Services [Dave Stonier]

Responsible for maintenance and project work on water treatment facilities and reticulation. Contributed to DWQMP, including Risk Assessments. Attended Workshops.

Project Coordinator and Inspector Infrastructure Services [Tony Balkin]

Responsible for maintenance and project work on water treatment facilities and reticulation. Contributed to DWQMP, including Risk Assessments. Attended Workshops.

Operators-In-Charge Water & Sewerage Branch: Cooloola Coast [Dean Long] Goomeri & Kilkivan [Colin Ford & William Bryer] Gympie [Keith Oliver and Wayne Richardson] Mary Valley [Greg Waugh]

Responsible for the operations of the treatment facilities within Council and reporting on performance of those facilities. Contributed to and reviewed DWQMP, including Risk Assessments. Attended Workshops.

Maintenance Fitter Water & Sewerage Branch [Brad Hawkesford]

Responsible for maintenance of active treatment assets. Contributed to DWQMP, including Risk Assessments. Attended Workshops.



Organisation / Participant Comments Treatment Operators Water & Sewerage Branch Cooloola Coast [Justin Chandler, Rob Hood, Jason O’Brien] Gympie [Ivan Ward, Bruce Sorensen]

Operations the treatment facilities within Council. Contributed to and reviewed DWQMP, including Risk Assessments Attended Workshops.

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 Officers Health & Environmental Services Branch Gympie Regional Council

Sampling of drinking water and monitoring reticulated potable water quality. Engaged in annual reviews of testing programmes and methodology. Engaged in review of systems to provide prompt notice of drinking water quality failures.

3.1.2 Critical Customer Health Groups

Health Problem Risk Solution Further Action Required

Haemodialysis Patients Require access to potable water for most of a 24-hour period.

Council has a policy of notifying all customers 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.

N/A

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,



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. 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. 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.

http://webbie/intranet/ALL/all/WSQ571.pdf



4.1 Table: Scheme Summary Scheme Name Amamoor Water Supply Scheme Source Amamoor Creek Allocation 31.78 ML/annum

Treatment Plant Process Contact filtration and disinfection Capacity 400 kL/day

Pump Stations 1 Length of Mains (Km) 2.9

Reservoirs Number 1 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.



4.2 Schematic: Amamoor Water Treatment Plant



4.3 Diagram: Distribution and Reticulation Amamoor



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 Infrastructure

Type (pumped/gravity/equipped bore/etc) Pumped from intake well

Description Screened river intake to pump well with

3.5l/s submersible pumps Treatment Plant

Name Amamoor Water Treatment Plant

Process Pre-chlorination, poly dosing and sand

filtration Design Capacity (20 hr operation) 0.4ML/d Daily flow range 0.1-.0.4ML/d Chemicals added Chlorine, polymer, PACL

Standby chemical dosing facilities (Y/N)

No. Spares and technical staff available 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 Yes- filter can be bypassed for back-

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

Disinfection

Location WTP Raw Water Pipeline Type Sodium Hypochlorite 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 Distribution and Reticulation System

Pipe material Asbestos Cement

Age range Average 50+ Years

Approx. % of total length 100% of 2.9 km

Areas where potential long detention periods could be expected

N/A

Areas where low water pressure (eg < 12 m) could be expected during peak or other demand periods)

N/A

Ground

Name Amamoor Reservoir



Component Scheme Reservoirs

Capacity (ML) 0.1

Roofed (Y/N) Y

Vermin-proof (Y/N) Y

Runoff directed off roof (Y/N)

Y

Water quality responsibility changes

Upstream location N/A

Downstream location GRC

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

Variable Raw pH Raw

Turbidity Raw Colour Raw Iron Raw

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.



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)

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Raw Turbidity Raw Colour Raw pH



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

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

Variable

Treated pH

Treated Turbidity

Treated Colour

Treated Aluminium

Treated Iron

Treated Manganese

Chlorine 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)

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Treated Turbidity Treated Colour Treated pH



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

4.9.3 Chart: Amamoor Treated Water Quality (Chlorine Residuals)

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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

Variable

Chlorine Residual - Operator

Chlorine Residual - Council

Coliform Count

e. Coli Count

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

Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate Ions

Zinc Boron Copper Silica

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

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

Variable

Turbidity pH Colour Total Hardness

Total Dissolved Solids

Fluoride Ions

Bromate Chlorate

[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



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)

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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.




5.1 Table: Scheme Summary Scheme Name Goomeri Water Supply Scheme

Source Bores

Treatment Plant Process BAC, Alum, Ozone Capacity 120kL/day


Reservoirs Number 2 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.



5.2 Schematic: Goomeri Water Treatment Plant



5.3 Diagram: Distribution and Reticulation Goomeri




Source 1 Name Kimbombi Creek

Type Screened gravity creek Intake at weir to off-stream

storage ponds (2) % of supply 70% (typical) Reliability Unreliable in drought (4 years holding capacity)

Water quality issues Blue-green algae and duckweed; Arsenic from dips

or mining in catchment Sourcing Infrastructure

Type (pumped/gravity/equipped 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 Infrastructure

Type (pumped/gravity/equipped bore/etc)

Equipped pressure sealed and concrete encased 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




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




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




Description bore depth:18m Treatment Plant

Name Goomeri Water Treatment Plant

Process All raw sources are mixed before entry to the plant.

Process comprises flocculation, clarification, filtration, ozone. BAC required during periods of



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)

Chemicals added Poly, Sodium Hydroxide, Ozone, Softener, Brine,

Sodium Hypochlorite


Y-Pumps. Spares for other parts and technical staff available 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 Dam & Bores can be run direct to reticulation

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

Location Into treated water tank Type Sodium Hypochlorite Dose rate 3mg/L 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

Distribution and Reticulation System

Pipe material Blue Brut 95%; AC 5%

Age range 75%>50yrs; 25%<30yrs

Approx. % of total length of 10.1 km


Old 225 raw gravity main from off-stream storages to treatment plant (Cannot Scour)


N/A

Reservoirs

Ground Goomeri Reservoir Name Mary St

Capacity (ML) 0.4ML

Roofed (Y/N) Y


Runoff directed off roof (Y/N) Y Water quality responsibility changes






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.


Variable

Raw pH

Raw Turbidity

Raw Colour

Raw Alkalinity

Raw Hardness

Raw Iron

Raw 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.



• 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)

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



Variable

Treated pH

Treated Turbidity

Treated Colour

Treated Alkalinity

Treated Hardness

Treated Aluminium

Treated Iron

Treated 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)

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


5.10.1 Table: Reticulated Water Quality 1/1/10 – 31/3/12

Variable



Coliform Count

e. Coli Count


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Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate 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

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.

Variable



Fluoride Ions

Bromate Chlorate




5.11.1 Chart: Goomeri Reticulated Water Quality (Chlorine Residuals)

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. 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.



Table: Scheme Summary Scheme Name Gympie Water Supply Scheme

Source

Mary River

Allocation 3455 ML/annum - High Priority

Treatment Plant Process

Coagulation, sedimentation, filtration, pH correction and disinfection and fluoridation

Capacity 18,000 kL/day (20 hours)

Pump Stations 3 Length of Mains (km) 248.2

Reservoirs Number 9 Capacity (ML) 27.88

Reservoir Details

Zone Location Capacity (ML)

North Side Low Zone Ferguson Hill 1 Ferguson Hill 2

9.1 9.1

North Side High Zone Wineglass 0.27

South Side Low Zone Jones Hill 1 Jones Hill 2 Lindsay Street LL

3.7 4.4 0.68

South Side High Zone Lindsay Street HL 0.14

Noosa Road Zone Noosa Road Penny Road

0.49 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.



6.1 Schematic: Gympie Water Treatment Plant



6.2 Diagram: Distribution and Reticulation Gympie




Sources

Name Borumba Dam Type River off-take from Mary River % of supply 100 Reliability Reliable; delivery dependent on dam managers

Water quality issues Silt; blue-green algae, pesticides; microbiological;

Arsenic; animal faeces; flotsam



Pumped from Pump well

Description Screened shallow off-take above temporary rock

weir via tunnel to deep pump well

Treatment Plant

Name Jones Hill Water Treatment Plant

(Gympie Water Treatment Plant)

Process Process comprises flocculation, clarification, filtration, chlorination and fluoridation; pH

correction. Design Capacity (20 hr operation) 18ML/d @ 250L/s Daily flow range 2.3-12.1ML/d

Chemicals added Alum, Chlorine, Fluoride, Soda Ash,

Polyelectrolyte, PACL, PAC, PolyDadMac


No. Spares and technical staff available to replace faulty equipment within system reserve capacity

buffer. Water sourced from and % Borumba Dam 100%

% of average day demand provided 100% % of scheme supply distribution area supplied

100%

Bypasses / Variations Yes Are there any sources that do not undergo disinfection prior to supply?

No

Disinfection

Location At both WTP Clearwater Pipelines & back-up at

Ferguson Hill Reservoirs

Type Chlorine Gas at Plant; Sodium Hypochlorite at

Ferguson Hill Reservoir

Dose rate C-Pumps: 2kg/hr; B-Pumps:1.4 & 1.8 kg/hr; As

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 Age range Average 30 Years old Approx. % of total length 60% of 248km Pipe material PVC Age range Average 10 Years old Approx. % of total length 20% of 248km



Component Scheme Pipe material Cast Iron Age range Average 30 Years old Approx. % of total length 200% of 248km Areas where potential long detention periods could be expected

Fisher Road Demand System (Kingfisher Development)


N/A

Reservoirs

(continued on next page)

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

Ground

Name Jones Hill 1 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

(continued from previous

page)

Elevated Name Wineglass Capacity (ML) 0.27 Roofed (Y/N) Y Vermin-proof (Y/N) Y Runoff directed off roof (Y/N) Y

Ground

Name Penny Rd Capacity (ML) 0.05



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


Upstream location SEQ Water



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.




Variable

Raw pH

Raw Turbidity

Raw Colour

Raw Alkalinity

Raw Hardness

Raw Aluminium

Raw Iron

Raw Manganese

Raw 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.



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

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

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ess

[mg/

L]

Raw Alkalinity Raw Hardness Raw Colour



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



Variable

Treated pH

Treated Turbidit

y

Treated Colour

Treated Fluoride

Treated Aluminium

15"

Treated Iron 15"

Treated Manganese

15"

Chlorine Residual to Res1

Chlorine Residual 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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Raw Aluminium Raw Manganese Raw Iron Raw Fluoride



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.



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

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

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Col

our [

HU

], Tu

rbid

ity [N

TU],

Fluo

ride

[mg/

L]

6.5

6.7

6.9

7.1

7.3

7.5

7.7

7.9

8.1

8.3

8.5

pH

Treated Turbidity Treated Colour Treated Fluoride Treated pH

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[mg/

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



6.8.3 Chart: Gympie Treated Water Quality (Chlorine Residuals)


6.9.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12

Variable



Coliform Count

e. Coli Count

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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[mg/

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Chlorine Residual to Res1 Chlorine Residual to Res2



Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate Ions




Variable Turbidity pH Colour Total

Hardness Total Dissolved

Solids Fluoride Ions

[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.



6.10.1 Chart: Gympie Reticulated Water Quality (Chlorine Residuals)

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. 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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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

[mg/

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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 Plant

Process Contact Filtration and disinfection Capacity 600 kL/day



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.



7.2 Schematic: Imbil Water Treatment Plant



7.3 Diagram: Distribution and Reticulation Imbil




Sources Name Borumba Dam

Type River Intake from

Yabba Creek % of supply 100

Reliability

Depends on timely releases

from Dam Manager

Water quality issues

blue-green algae, dirty water,

arsenic; Animal Faeces; Timber

milling by-products



Pumped from rock and geofabric

screened pump well at River

Intake

Description Intake on Yabba

Creek Treatment Plant

Name Imbil Water

treatment Plant

Process

Chlorination, Poly dosing and sand

filtration Design Capacity (20 hr operation) 0.6ML/d Daily flow range 0.2-0.6ML/d

Chemicals added

Sodium Hypochlorite,

polymer (PACL) Standby chemical dosing facilities (Y/N) Y- Manual

Water sourced from and %

100% exclusive to 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 Location

Imbil WTP Raw Water Pipeline

Type Sodium

Hypochlorite Dose rate 10-15 mg/L Target residual levels 4 mg/L leaving



Component Scheme plant

Duty/standby Y- Manual Dosing arrangements fixed Alarms N

N Auto shut-off arrangements Distribution and Reticulation System


Age range Average 50 Yrs

Approx. % of total length 100% of 7.9km


Reservoir and Showgrounds


N/A

Reservoirs Ground

Name Imbil Reservoir

Capacity (ML) 0.75

Roofed (Y/N) Y



Upstream location SEQ Water



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. 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.





Variable

Raw pH Raw Turbidity

Raw Colour Raw Iron Raw 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.



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

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

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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ur [H

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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.


Variable

Treated pH

Treated Turbidity

Treated Colour

Treated Aluminium

Treated Iron

Treated Manganese

Chlorine Residual


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



• 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.



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

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

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tdy

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olou

r [H

U]

Treated pH Treated Turbidity Treated Colour

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7.9.3 Chart: Imbil Treated Water Quality (Chlorine Residuals)


7.10.1 Tables: Reticulated Water Quality 1/1/10 – 31/3/12 Variable



Coliform Count

e. Coli Count


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[mg/

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Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate Ions




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.

Variable



Fluoride Ions

Bromate Chlorate




7.11.1 Chart: Imbil Reticulated Water Quality (Chlorine Residuals)

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. 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. 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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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.

8.1 Table: Scheme Summary Scheme Name Kandanga Water Supply Scheme

Source Kandanga Creek and Kandanga Bore (emergency only)

Allocation 59 ML/annum

Treatment Plant Process Contact filtration and disinfection Capacity 400 kL/day



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.



8.2 Schematic: Kandanga Water Treatment Plant



8.3 Diagram: Distribution and Reticulation Kandanga




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

Type Bore, pressure sealed and concrete

encased % of supply 0 Reliability Poor Water quality issues Not Used in 10 yrs. High Manganese Sourcing Infrastructure

Type (pumped/gravity/equipped bore/etc) 2x 5.5L/s Pumps/ Bore Pump

Description Rock and geofabric screened pump well

at river intake above Weir Treatment Plant Name Kandanga Water Treatment Plant

Process Pre-chlorination, poly dosing and sand

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

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 Bypass Filters & Contact Tanks/ Chlorine

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



Age range Average 50+ Years

Approx. % of total length 100% of 3.4 km


Dead ends where domestic is only use



Component Scheme Areas where low water pressure (eg < 12 m) could be expected during peak or other demand periods)

N/A

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 responsibility changes


Downstream location N/A


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. 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.

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.


Variable Raw pH Raw

Turbidity Raw Colour Raw Iron Raw

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.



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)

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


8.8.1 Table: Treated Water Quality

Variable

Treated pH

Treated Turbidity

Treated Colour

Treated Aluminium

Treated Iron

Treated Manganese

Chlorine Residual


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



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)

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8.5

pH

Treated Turbidity Treated Colour Treated pH



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

8.9.3 Chart: Kandanga Treated Water Quality (Chlorine Residuals)

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Variable



Coliform Count

e. Coli Count


Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate Ions




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

Variable



Fluoride Ions

Bromate Chlorate




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)

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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. 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. 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. 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.

9.1 Table: Scheme Summary Scheme Name Kilkivan Water Supply Scheme

Source Wide Bay Creek

Treatment Plant Process Reverse Osmosis Filtration and Chlorination Capacity 200kL/day


Reservoirs Number 1 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.




9.2 Schematic: Kilkivan Water Treatment Plant



9.3 Diagram: Distribution and Reticulation Kilkivan




Source 1 Name Wide Bay Creek Type Off-stream Storages % of supply 0% Reliability Unreliable in Drought Water quality issues blue-green algae, Duckweed


Type (pumped/gravity/equipped 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



Equipped pressure sealed and concrete 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



Equipped pressure sealed and concrete 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




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




Description Bore Depth:6m Treatment Plant

Name Kilkivan Water Treatment Plant

Process

Sand Filter, Carbon Filtration, Reverse Osmosis, pH Correction, Filtrate Mixing and

Chlorination Design Capacity (20 hr operation) 0.2ML/d @ 4L/s



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

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 Bypass R/O or whole of plant from bore or

off-stream storage Are there any sources that do not undergo disinfection

prior to supply? No Disinfection

Location WTP Type Sodium Hypochlorite 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


Pipe material 75% AC; 25% Blue Brut

Age range 50-20yrs

Approx. % of total length % of 26.6km Areas where potential long detention periods could be expected

Towards Dump; 150mm Main; showgrounds


No

Reservoirs A

Ground

Name Kilkivan

Capacity (ML) 0.6ML

Roofed (Y/N) Y






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.



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.


Variable

Raw pH

Raw Turbidity

Raw Colour

Raw Alkalinity

Raw Hardness

Raw Iron

Raw Manganese


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.



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

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

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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12

[mg/

L]




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.


Variable

Treated pH

Treated Turbidity

Treated Colour

Treated Alkalinity

Treated Hardness

Treated Iron

Treated Manganese


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


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.



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

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


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], Co

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linity

[meq

/L],

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[mg/

L]

Treated pH Treated Turbidity Treated Colour Treated Alkalinity Treated Hardness

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Treated Iron Treated Manganese




Variable



Coliform Count

e. Coli Count


Variable Dissolved

Aluminium Dissolved

Manganese Dissolved

Iron Chloride

Ions Nitrate

Ions Sulphate

Ions Zinc Boron Copper Silica




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.

Variable Turbidity pH Colour Total Hardness


Fluoride Ions

Bromate Chlorate

[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



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)

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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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

[mg/

L]




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. 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. 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.

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

Source Bores


Treatment Plant Process Closed system pH correction, filtration and

chlorination Capacity 2,520 kL/day



Reservoir Details Zone Location Capacity (ML)

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.



10.2 Schematic: Rainbow Beach Water Treatment Plant



10.3 Diagram: Distribution and Reticulation Rainbow Beach




Sources

Name Rainbow Beach

Type bore field

% of supply 100

Reliability Restricted out takes

Water quality issues Nil


Bore field 5 pressure sealed and concrete

encased bores

Sub-artesian sand aquifer Depths: 50-65m Sources Carlo Creek Off-take Decommissioned

Sources that do not undergo treatment prior to supply No

Treatment Plant

Name Rainbow Beach

Process Process comprises pH

correction and chlorination

Design Capacity (20 hr operation) 2.52ML/d

Daily flow range 0.16-2.0ML/d

Chemicals added Chlorine, Soda Ash

Standby chemical dosing facilities (Y/N) Dosed pH and Raw Water

valves Water sourced from and % 100% exclusive to above

% of average day demand provided 100


Bypasses / Variations Treatment plant can be

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

Disinfection

Location WTP Clearwater Pipeline

Type Chlorine Gas

Dose rate 3.4L/ML

Target residual levels 1.0-3.5mg/L

Duty/standby Yes

Dosing arrangements Fixed

Alarms None

Auto shut-off arrangements None



Age range 20-50+ Yrs


Pipe material PVC

Age range 0-20 Yrs


Areas where potential long detention periods Carlo Point



Component Scheme could be expected


Nil

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





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.





Variable

Raw pH

Raw Turbidity

Raw Colour

Raw Alkalinity

Raw Aluminium

Raw Iron

Raw Manganese


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)

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pH, T

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dity

[NTU

], Co

lour

[HU]

, Alk

alin

ity [m

eq/L

]

Raw pH Raw Turbidity Raw Colour Raw Alkalinity



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



Variable

Treated pH

Treated Alkalinity

Treated Turbidity

Treated Colour

Treated Aluminium

Treated Iron

Treated Manganese

Chlorine 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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Raw Aluminium Raw Iron Raw Manganese



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)

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pH, T

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], C

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r [H

U]

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150

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250

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350

400

Alk

alin

ity [m

eq/L

]

Treated pH Treated Turbidity Treated Colour Treated Alkalinity



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

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


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[mg/

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Variable



Coliform Count

e. Coli Count


Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate Ions




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

Variable



Fluoride 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



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)

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. 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

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2.5

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

[mg/

L]




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. 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.

11.1 Table: Scheme Summary Scheme Name Tin Can Bay/Cooloola Cove Water Supply Scheme

Source Teewah Creek


Treatment Plant

Process Coagulation, sedimentation, filtration, pH correction, chlorination and fluoridation.

Capacity 3,600 kL/day Pump Stations 4

Reservoirs Number 3

91.1 Capacity (ML) 6.32

Reservoir Details

Zone Location Capacity (ML) Cooloola Cove Cooloola Cove 5.0 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.



11.2 Schematic: Cooloola Cove Water Treatment Plant



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




Sources Name Teewah Creek Type Spring fed creek % of supply 100 Reliability Very Reliable

Water quality issues Extremely High Tannin Content & Acidity


Type (pumped/gravity/equipped bore/etc) Pumped from screened pump well at creek intake via relay pump station

Description Drawn off sandy creek Treatment Plant

Name Tin Can Bay/Cooloola Cove Water

Treatment Plant

Process Process comprises flocculation,

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

Standby chemical dosing facilities (Y/N) No. Spares and technical staff available

to replace faulty equipment within system reserve capacity buffer.

Water sourced from and % 100% exclusive to above

% of average day demand provided 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


Pipe material Asbestos Cement 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 could be expected

Possible at Norman Point



Component Scheme Areas where low water pressure (eg < 12 m) could be expected during peak or other demand periods)

Possible at Norman Point

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





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





Variable

Raw pH

Raw Turbidity

Raw Colour

Raw Alkalinity

Raw Hardness

Raw Aluminium

Raw Manganese

Raw 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.



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

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

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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dity

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], A

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inity

[meq

/L]

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100

150

200

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400

450

500

Har

dnes

s [m

g/L]

, Col

our [

HU

]

Raw pH Raw Turbidity Raw Alkalinity Raw Colour Raw Hardness

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Raw Aluminium Raw Manganese Raw Iron



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.


Variable

Treated pH

Treated Alkalinity

Treated Turbidity

Treated Colour

Treated Fluoride

Treated Aluminium

Treated Iron

Treated Manganese

Chlorine 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


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.



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

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

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pH, T

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], C

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r [H

U],

Fluo

ride

[mg/

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Alk

alin

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eq/L

]

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



Variable



Coliform Count

e. Coli Count


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Variable

Dissolved Aluminium

Dissolved Manganese

Dissolved Iron

Chloride Ions

Nitrate Ions

Sulphate 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


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.

Variable



Fluoride 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



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

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 Indicator Performance Measure

Target

FY 2009 FY 2010 FY 2011

Drinking water quality (physical and chemical parameters)

% compliance

>98%

100% 99.9% 99.8%

Drinking water complaints Number/1000 connections/ year

<10

1.4 1.8 4.3

Drinking water quality complaints

Number/ incidents/ year

<10

17 22 54

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

0

1

2

3

4

5

6

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

[mg/

L]



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

Scheme Year Main Reasons for Complaints Cause / Likely Source

Resolution of Problem

Goomeri

2011

Discoloured water

Line requires flushing, after mains work or because of deposit/build ups.

Flush and scour mains.

Odour

Seasonal raw water quality not being removed during treatment

Flush and scour mains. Review treatment processes to optimise for odour removal. 2012 Odour Scoured water main.

Gympie

2010

Water tastes like chlorine.

Tested for Chlorine, within limits. Seasonal raw water quality or mains deposit/build up.

Flush and scour mains until water is clear.

Discoloured water Work on mains, or deposit / build up in mains. Dirty Water

Red slime in tap water Appears to be internal, investigated around mains etc.

2011

Dirty Water

Work on mains, or deposit / build up in mains Council scouring program stirred up customers supply (end of line after scour point)

Flush and scour mains until water is clear. Occasionally ran garden tap to clear, suggested to same with internal taps.

Milky water Cloudy water and brownish colour Water is running cloudy Discoloured water Dirty and smelly water Brown water Dirty Water - stained washing Badly discoloured water

Water tastes like chlorine.

Tested for Chlorine, within limits. Seasonal raw water quality or mains deposit/build up.

Water (quality) taste and smell.

Seasonal raw water quality not being removed during treatment

Flush and scour mains. Review treatment processes to optimise for

Poor taste water taste





Dirty water, cloudy Work on mains, or deposit / build up in mains

odour removal

Dirty Water Internal Galvanised pipe feeding bath

Gympie

2012

Dirty Water

Work on mains, or deposit / build up in mains

Flush and scour mains until water is clear.

Dirty water - yellowish in colour Water tastes like chlorine. Water brown and smelly

Imbil

2010

Water taste and odour, chlorine.

Pumping during the day through reticulation system. Checked free chlorine, within ADWG. Possible source water seasonal issues, or degraded sodium hypochlorite in storage.

Flush and scour mains. Review treatment processes to optimise for odour removal. Review storage of sodium hypochlorite.

Dirty water Work on mains, or deposit / build up in mains

Imbil 2011 Dirty Water Work on mains, or deposit / build up in mains


Imbil

2012

Strong chlorine odour

Pumping during the day through reticulation system. Checked free chlorine, within ADWG. Possible source water seasonal issues, or degraded sodium hypochlorite in storage.

Flush and scour mains. Review treatment processes to optimise for odour removal. Review storage of sodium hypochlorite.

Imbil 2012 Oily film on top of water

Sampled at residence, no evidence found. No smell or odour. No other complaints. Possible low usage internally (rarely home).

Kandanga

2012

Dirty smelly water.

Work on mains, or deposit / build up in mains. Sample taken was clear.

Flush and scour mains until water is clear. Ran internal garden tap to clear, suggested to same with internal taps.

Kilkivan 2010 Discoloured water.

Kilkivan

2011

Black specks in water

Found to be deposits in mains and service water lines. Algal build up.

Flush and scour mains until water is clear. Ran internal garden tap to clear, suggested to same with internal taps. Dirty Water

Work on mains, or deposit / build up in mains.

Rainbow Beach 2010 Cloudy-milky water Work on mains, or deposit / build up in mains.

Flush and scour mains

Rainbow Beach 2011 Black particles in water Iron-related scale in pipes. Flush and scour mains





Tin Can Bay / Cooloola Cove

2011 Black spots in water Iron-related scale in pipes.


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)



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



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) Further details are presented in the full report, including:

• Recharge of a sand mass aquifer primarily through direct infiltration of incident rainfall;



• 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.



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.



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 Borumba Dam Operator.

Responsible for managing water quality in the source water Council requested catchment water quality information and management strategy for the risk assessment but there was no response from SEQWater

General Manager Water & Sewerage Branch [Ian Schiefelbein]

Responsible for managing the water treatment and supply for all of Council.

Manager- Treatment & Compliance Water & Sewerage Branch [Shaun Johnston]

Responsible for document control and for technical support to and reporting for all water treatment facilities for Council.

Operations Manager Water & Sewerage Section [Darren Beutel]

Responsible for reticulation and technical support for drinking water within Council.

Assistant General Manager Water & Sewerage Branch [Jason Kane]

Responsible for asset and project management of all water treatment and reticulation assets within council.

Treatment Plant Superintendent and Trade Waste Officer Water & Sewerage Branch [Ross Gibbs]

Responsible for leak detection in the reticulation system and operations at all Water Treatment Plants

Foreman Water & Sewerage Section [Dave Stonier]

Responsible for maintenance and project work on water treatment facilities and reticulation.

Project Co-ordinator Water & Sewerage Section [Tony Balkin]

Responsible for maintenance and project work on water reticulation assets.

Operators-In-Charge Water & Sewerage Branch

Responsible for the operations of the water treatment facilities within Council.

Cooloola Coast [Dean Long] Goomeri & Kilkivan [Colin Ford] Gympie [Keith Oliver] Mary Valley [Greg Waugh]

Maintenance Fitter Water & Sewerage Branch [Brad Hawkesford]

Responsible for maintenance of water treatment facilities.



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

14.2.3 Table: Likelihood Definitions for determining Risk Levels Likelihood Descriptors

Rare Occurs less than or equal to once every 2 years

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

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

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

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

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



14.2.4 Table: Consequence Definitions for determining Risk Levels

Consequence Descriptors

Insignificant Isolated excedence of aesthetic parameter with little or no disruption to normal operation

Minor Potential local aesthetic, isolated excedence of chronic health parameter

Moderate Potential widespread aesthetic impact or repeated breach of 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

Likelihood Consequence

Insignificant Minor Moderate Major Catastrophic

Almost certain 6 - Medium 10 - High 15 - High 20 -

Extreme 25 - 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



14.2.6 Table: Level of Uncertainty Definition

Level of Uncertainty Definition

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

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

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

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

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



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

ID# Treatment Phase Hazard Source Conse-quence

Likeli-hood

Maximum Risk

Comments Uncert-

ainty

1 Source Bacteria (E. Coli, etc)

Wastewater treatment plants Septic tanks in catchment Stock & Wildlife Animal Contamination of Reservoirs /Plants Bypass

Catastrophic Almost Certain

25 - Extreme

Assume that there is always Bacteria is in the source water. Cattle can access the river, it’s almost certain the they contaminate the water with bacteria. Other animals may also contaminate water. A number of townships within the catchments are not sewered. System of monitoring septic systems cannot be relied upon.

Certain

2 Source Viruses


Catastrophic Likely 20 -

Extreme

Assume that there is always Bacteria is in the source water. Cattle can access the river, its almost certain the they contaminate the water with bacteria. Other animals may also contaminate water. A number of townships within the catchments are not sewered. System of monitoring septic systems cannot be relied upon.

Certain

3 Source Protozoa

Wastewater treatment plants Septic tanks in catchment Stock & Wildlife Animal Contamination of Reservoirs /Plants Bypass Recycled water from sludge extraction process


Extreme


Certain

4 Reticulation & Storage Viruses Reticulation Repairs Backflow Infection of Reservoirs

Catastrophic Possible 15 - High Assume contamination possible at any worksite and from any customer source

Confident

5 Reticulation & Storage Protozoa Reticulation Repairs Backflow Infection of Reservoirs


Confident

6 Reticulation & Storage Bacteria (E. Coli, etc)

Reticulation Repairs Backflow Infection of Reservoirs


Confident




Likeli-hood

Maximum Risk

Comments Uncert-

ainty

7 Source Turbidity

Runoff Disturbances from animals and machinery, events (eg. Country Music Muster) Construction (grader, main roads) Burn offs / fire fighting Dam turnover (seasonal) Bypass Recycled water from sludge extraction process

Moderate Likely 12 - High Some plants have very low likelihood Confident

8 Source Organic Matter - Suspended

Runoff Seasonal (including dam turnover)

Moderate Likely 12 - High Surface water sources are likely. Bores with tannins.

Confident

9 Source pH outside the guidelines

Natural (too low from RB bores) Seasonal Chemical Additives

Moderate Likely 12 - High Loss of effective chlorination when pH is too high Coagulation not effective

Certain

10 Source Metals

Aluminium Copper Zinc Lead Mercury Cadmium Others

Moderate Likely 12 - High SNAP test results show some issues Metals monitored regularly

Confident

11 All Operational Errors

Untrained or inexperienced operators, fitters or network staff making operational errors

Major Possible 12 - High Training and procedure based response employed

Certain

12 Source Anions Chlorate , Bromate , Fluoride, Sulphate , Nitrate Others

Moderate Likely 12 - High Monitored regularly Confident

13 Source Arsenic

Fertilizers (cropping) Septic systems / STPs Mining Activities Old Cattle Dips

Moderate Possible 9 -

Medium

Goomeri off stream, Kilkivan and Amamoor had some levels, Imbil, Kandanga > 10% of limit.

Reliable

14 Treatment

Plant Bypasses Recycling decant water

Treatment bypassed Moderate Possible 9 -

Medium Plant bypasses are in place for all plants. Procedures prevent usage now.

Certain

15 All Operational Control Failure

Failure of communications between assets, server & operators Deterioration of reticulation equipment causing quality issues. Unlined fittings Calibrations not carried out or in error


Medium

Most systems are self-controlled, only returning operational information to the server via telemetry (for example, river pumps). Black Specks have been found in the water from deteriorating flexi couplings. Rubber deteriorates in time. Some unlined fittings deteriorating (anecdotal evidence) All systems have multiple online and testing equipment that require regular calibrations.

Estimate




Likeli-hood

Maximum Risk

Comments Uncert-

ainty

16 Treatment & Storage Disinfection overdosing

Disinfection in Reticulation System has no online monitoring.


Medium Sodium Hypochlorite is dosed at some reservoirs to maintain disinfection residual

Confident

17 Reticulation Mains failure Aged infrastructure Accidental damage


Medium With mains pressure, it is unlikely to have hazards enter against the flow of water.

Confident

18 Source Total Dissolved Solids

Hardness Salinity


Medium Limited impact on most networks Reliable

19 Treatment

Treatment chemicals wrongly dosed

Ozone Chlorine gas Sodium hypochlorite Polyelectrolytes Soda ash Aluminium Sulphate Fluoride Brine


Medium

Possible hazards in treated water, but not present in raw water. Dosed as part of the treatment process

Confident

20 Source & Reticulation Cleaning chemicals, Bores

Bore chemical treatment Pipe repair disinfection


Medium

Standard method is to flush bore system to clean. It, recirculate it for one day, sit overnight, flush next day. Bore is isolated from the system via a valve, system is flushed before bringing bore back online.

Confident

21 Treatment & Reticulation

Disinfection By-products (including Chlorates)

Prechlorination, THM's Moderate Possible 9 -

Medium

Possible hazards in treated water especially hypochlorite dosing, but not present in raw water. High risk areas are low flow points in reticulation system.

Estimate

22 Source Manganese Runoff Groundwater / soil Old mines

Minor Likely 8 -

Medium

Seasonal events are evident from the water quality data. These occur in dam turnover at Borumba, flooding, significant rainfall, low rainfall. There are so many possible causes that it is not always clear.

Confident

23 Source Iron

Soil Make-up Runoff Lake stratification Lake roll over

Insignificant Almost Certain

6 - Medium

Seasonal events are evident from the water quality data. These occur in dam turnover, flooding, significant rainfall, low rainfall. There are so many possible causes that it is not always clear.

Confident

24 Treatment, Reticulation & Storage

Harmful substances (not identified)

Accidental or intentional contamination Catastrophic Rare 6 -

Medium

No barrier as the nature of the contaminant is unknown. The consequence could definitely be catastrophic and this has not occurred in the past and therefore is a rare event.

Confident

25 Source


Accidental or intentional contamination Catastrophic Rare 6 -

Medium


Confident




Likeli-hood

Maximum Risk

Comments Uncert-

ainty

26 Reticulation & Storage Turbidity Pipeline construction/ repair Reservoir turnover

Minor Possible 6 -

Medium Some plants have very low likelihood Confident

27 Source Iron Bacteria Growth of bacteria in the bore, can occur in reticulation system

Minor Possible 6 -

Medium May occur in bore holes where iron content in source water is higher.

Confident

28 Source Pesticides

Agricultural runoff / forestry Spraying of aquatic weeds Accidental / deliberate spills Old cattle dips

Minor Unlikely 4 - Low

No long-term monitoring data available. The catchment includes cattle - there are old stock dips - but no cropping or intensive agriculture (only forestry). No expected pesticide issues but is uncertain. Pesticide testing has shown v low or no levels.

Estimate

29 Source Nitrate Fertilizers (cropping) Septic systems / STPs Fecal Contamination

Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident

30 Reticulation Iron Bacteria Growth of bacteria in the bore, can occur in reticulation system


May build up in retic system. Old pipelines may still have some iron bacteria building up in the line and services. Small service lines may be air scoured.

Confident

31 Source Contamination through Bore Head

As for other contamination Moderate Rare 3 - Low All contaminated water would go through treatment normally Reliable

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

Confident

33 Source Hydrocarbons Fuel tanks in the catchment Service stations

Moderate Rare 3 - Low

Anecdotally there has been very minor issues. JHWTP has had rare fuel odours, plant shut down if any suspected contamination. No major storages in the catchment.

Confident

34 Source Fluoride Geology Insignificant Rare 1 - Low

Fluoride detected about 0.1 mg/L in raw water for Gympie, nowhere near the health limit of 1.5mg/L. Has been tested for in other systems. Highest snapshot test was Goomeri at 0.2mg/L.

Certain



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 Phase

Hazard Source Conse-quence

Likeli-hood

Maximum Risk

Comments Uncert-

ainty Existing Preventive Measures

Conse-quence

Likeli-hood

Maximum Risk

Comments/Further Actions




25 - Extreme


Certain

Treatment as detailed for each plant. Disinfection (chlorination) in all plants Roofed reservoirs Procedures in place to protect from bypass events

Catastrophic Rare 6 - Medium

Treatment processes sufficient to protect customers Cannot lower an initial "catastrophic" consequence to any lower than "medium" level residual risk. Continued monitoring and systems improvement required.

2 Source Viruses



Extreme


Certain



Treatment processes sufficient to protect customers Cannot lower an initial "catastrophic" consequence to any lower than "medium" level residual risk. Continued monitoring required.

3 Source Protozoa



Extreme

Assume that there is always Bacteria is in the source water. Cattle can access the river, it’s almost certain the they contaminate the water with bacteria. Other animals may also contaminate water. A number of townships within the catchments are not sewered. System of monitoring septic systems cannot be relied upon.

Certain

Treatment as detailed for each plant. Procedures in place to protect from bypass events



4 Reticulation & Storage

Viruses Reticulation Repairs Backflow Infection of Reservoirs


Confident

Reticulation repair procedures (eg. flushing used, don't cross sewage and water equipment). Backflow prevention devices mandated Roofed and sealed reservoirs


Processes sufficient to protect customers Cannot lower an initial "catastrophic" consequence to any lower than "medium" level residual risk. Continued monitoring and systems improvement required.


Protozoa Reticulation Repairs Backflow Infection of Reservoirs


Confident

Reticulation repair procedures (eg. flushing used, don't cross sewage and water equipment) Backflow prevention devices mandated Roofed and sealed reservoirs





ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk



Bacteria (E. Coli, etc)

Reticulation Repairs Backflow Infection of Reservoirs


Confident

Reticulation repair procedures (eg. flushing used, don't cross sewage and water equipment) Backflow prevention devices mandated Roofed and sealed reservoirs



7 Source Turbidity



Treatment as detailed for each plant. Filtration or Flocculation/Sedimentation/ Filtration as detailed for each plant. Chlorination (disinfection)


Continued monitoring and systems improvement required

8 Source Organic Matter - Suspended



Confident

Filtration or Flocculation/Sedimentation/Filtration as detailed for each plant. Chlorination in all plants(disinfection) Moderate Rare 3 - Low


9 Source pH outside the guidelines

Natural (too low from RB bores) Seasonal Chemical Additives

Moderate Likely 12 - High Loss of effective chlorination when pH is too high Coagulation not effective

Certain

Change from dosing coagulation to match pH range of source water pH is monitored, not alarmed. No control for High pH Operational tests (daily) or online monitored, including turbidity. Moderate Rare 3 - Low


10 Source Metals



Confident

Treatment as detailed for each plant. Periodic monitoring program to determine possible poor performance.



11 All Operational Errors

Untrained or inexperienced operators, fitters or network staff making operational errors

Major Possible 12 - High Training and procedure based response employed

Certain

Training plans, mentoring, Council providing training for qualifications. Part of the recruitment process. All operators to receive training and to be supervised until qualified and judged to have enough experience. Training provided for all staff. Qualifications required for some positions. Training monitored and updated as necessary. Procedures and WMS in place for tasks as part of quality system. Major Rare

5 - Medium

Processes sufficient to protect customers Cannot lower an initial "Major" consequence to any lower than "medium" level residual risk. Continued monitoring and planning required.

12 Source Anions Chlorate , Bromate , Fluoride, Sulphate , Nitrate, Others


Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


13 Source Arsenic



Medium


Reliable

Treatment as detailed for each plant. Filtration/coagulation: in MV, Floc/Sed/Filter in JHWTP, Filtration in RB, CC is Floc, sed, filtered, Kilkivan is filtered, Goomeri is coag/sed/filt/ozone/bac filter Moderate Rare 3 - Low


14 Treatment

Plant Bypasses Recycling decant water

Treatment bypassed Moderate Possible 9 -

Medium Plant bypasses are in place for all plants. Procedures prevent usage now.

Certain

Review of bypass procedures, locks and physical preventions (such as welding shut or blinding). Dewater from sludge extraction process recycled in a timely manner Moderate Rare 3 - Low


15 All Operational Control Failure

Failure of communications between assets, server & operators Deterioration of reticulation equipment causing quality issues Unlined fittings Calibrations not carried out or in error


Medium

Most systems are self-controlled, only returning operational information to the server via telemetry (for example, river pumps). Black Specks have been found in the water from deteriorating flexi couplings. Rubber deteriorates in time. Some unlined fittings deteriorating (anecdotal evidence) All systems have multiple online and testing equipment that require regular calibrations.

Estimate

Existing Outpost2 system unreliable, but local control telemetry is more reliable. Asset Management systems, procedures and practices in place to minimise risk of failure and respond in case of failures.



16 Treatment & Storage

Disinfection overdosing

Disinfection in Reticulation System has no online monitoring.


Medium

Sodium Hypochlorite is dosed at some reservoirs to maintain disinfection residual

Confident

Reticulation monitoring for chlorine residuals will pick up high or low levels. Operators monitor liquid levels and dose rates frequently. Moderate Rare 3 - Low


17 Reticulation Mains failure Aged infrastructure Accidental damage


Medium With mains pressure, it is unlikely to have hazards enter against the flow of water.

Confident

Disinfection (chlorination) in all plants with a residual high enough to combat small infiltrations due to mains repairs. Reticulation repair procedures (eg. flushing used, don't cross sewage and water equipment). Moderate Rare 3 - Low



Hardness Salinity



RO , blended product to prevent too much softness. Ion exchange softener. Monitored at all plants and treatment as described for each plant Moderate Rare 3 - Low


19 Treatment

Treatment chemicals wrongly dosed

Ozone Chlorine gas Sodium hypochlorite Polyelectrolytes Soda ash Aluminium Sulphate Fluoride Brine


Medium

Possible hazards in treated water, but not present in raw water. Dosed as part of the treatment process

Confident

Process control. Online monitoring, continuous (including grab samples). Alarms / plant shutdowns. Operator monitoring.



20 Source & Reticulation

Cleaning chemicals, Bores

Bore chemical treatment Pipe repair disinfection


Medium

Standard method is to flush bore system to clean. It recirculate it for one day, sit overnight, flush next day. Bore is isolated from the system via a valve, system is flushed before bringing bore back online.

Confident Procedures require the final flush to be monitored until the flush water runs clean.





ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


21 Treatment & Reticulation

Disinfection By-products (including Chlorates)

Prechlorination, THM's Moderate Possible 9 -

Medium

Possible hazards in treated water especially hypochlorite dosing, but not present in raw water. High risk areas are low flow points in reticulation system.

Estimate

Survey in 2003, testing across GRC. All below limits. Recent tests show some by-products but not above ADWG values. Snap shot monitoring in reticulation network. Monitoring points determined by risk-based approach. Moderate Rare 3 - Low

Continued monitoring and systems improvement required including design changes when planning plant and network upgrades

22 Source Manganese Runoff Groundwater / soil Old mines

Minor Likely 8 -

Medium


Confident

Treatment as detailed for each plant. Prechlorination - oxidises and filters out. Sedimentation will remove insoluables . Filters establish a coating that removes Mn Minor Rare 2 - Low


23 Source Iron



6 - Medium

Seasonal events are evident from the water quality data. These occur in dam turnover , flooding, significant rainfall, low rainfall. There are so many possible causes that it is not always clear.

Confident

Treatment as detailed for each plant. Prechlorination - oxidises and filters out Sedimentation will remove insoluables Filters establish a coating that removes Fe Insignificant Rare 1 - Low


24 Treatment, Reticulation & Storage


Accidental or intentional contamination

Catastrophic Rare 6 -

Medium


Confident

Nothing monitored for. Rely on Customer feedback. Backflow devices mandated, Storages roofed and locked. Retic access points locked Regular inspections and cleanouts to be scheduled. Security for reservoirs. Inspected regularly by operators. Catastrophic Rare

6 - Medium

Cannot lower an initial "Catastrophic" consequence to any lower than "medium" level residual risk. Continued monitoring and systems improvement required.

25 Source


Accidental or intentional contamination

Catastrophic Rare 6 -

Medium


Confident

Nothing monitored for. Any suspected quality issues will result in the plant shut down. Treatment as outlined for each plant Operators monitor plant and intake.


Treatment processes sufficient to provide some protection to customers Cannot lower an initial "catastrophic" consequence to any lower than "medium" level residual risk. Continued monitoring and systems improvement required.


Turbidity Pipeline construction/ repair Reservoir turnover

Minor Possible 6 -

Medium Some plants have very low likelihood Confident

Reticulation repair procedures (eg. flushing used, don't cross sewage and water equipment). Backflow prevention devices mandated Roofed and sealed reservoirs Minor Rare 2 - Low


27 Source Iron Bacteria Growth of bacteria in the bore, can occur in reticulation system

Minor Possible 6 -


Confident

Chemically treating bores (Envirobore),Sand filtration removes particles. Maintain chlorine residual. Raw water colour is indicative. Minor Rare 2 - Low



Agricultural runoff / forestry Spraying of aquatic weeds Accidental / deliberate


No long-term monitoring data available. The catchment includes cattle - there are old stock dips - but no cropping or intensive agriculture (only forestry). No expected pesticide issues but is uncertain.

Estimate

Treatment as detailed for each plant. Filtration or Flocculation/Sedimentation/Filtration as detailed for each plant. Chlorination in all plants(disinfection) Minor Rare 2 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


spills Old cattle dips

Pesticide testing has shown v low or no levels.


Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident Treatment as detailed for each plant.

Minor Rare 2 - Low


30 Retuculation Iron Bacteria Growth of bacteria in the bore, can occur in reticulation system


May build up in retic system. Old pipelines may still have some iron bacteria building up in the line and services. Small service lines may beair scoured.

Confident Scour reticulation system, pigging trunk mains as necessary.

Minor Rare 2 - Low


31 Source Contamination through Bore Head

As for other contamination

Moderate Rare 3 - Low All contaminated water would go through treatment normally

Reliable No open access to flows; Access to bore holes pad-locked



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

Confident

Only applies to a couple of catchments where it is monitored. Filtration, Ozone & BAC & alternate source management or Filtration and PAC or RO and source management used in these plants. Treatment as detailed for each plant. Moderate Rare 3 - Low


33 Source Hydrocarbons

Fuel tanks in the catchment Service stations



Confident

Treatment as detailed for each plant. Filtration/coagulation: in MV, Floc/Sed/Filter in JHWTP, Filtration in RB, CC is Floc, sed, filtered, Low level intakes from river Moderate Rare 3 - Low


34 Source Fluoride Geology Insignificant Rare 1 - Low

Fluoride detected about 0.1 mg/L in raw water for Gympie, nowhere near the health limit of 1.5mg/L. Has been tested for in other systems. Highest snapshot test was Goomeri at 0.2mg/L.

Certain

When dosed, Compliant for code of conduct for fluoride dosing. All triple-check systems in place: operator monitoring, flow limiting, fluoride saturator, flow switches, etc. Insignificant Rare 1 - Low




14.3.2 Table: Existing and Proposed Preventative Measures (Shared) by Whole of Council

ID# Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain




2 Source Viruses



Extreme


Certain




3 Source Protozoa



Extreme


Certain

Treatment as detailed for each plant. Procedures in place to protect from bypass events



4 Source Turbidity






5 Source

Organic Matter - Suspended



Confident

Filtration or Flocculation/Sedimentation/Filtration as detailed for each plant. Chlorination in all plants(disinfection) Moderate Rare 3 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


6 Source Metals



Confident

Treatment as detailed for each plant. Periodic monitoring program to determine possible poor performance.



7 Source Anions

Chlorate , Bromate , Fluoride, Sulphate , Nitrate Others




8 Source Arsenic



Medium


Reliable

Treatment as detailed for each plant. Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low



Hardness Salinity



RO , blended product to prevent too much softness Ion exchange softener. Monitored at all plants and treatment as described for each plant Moderate Rare 3 - Low


10 Source Manganese

Runoff Groundwater / soil Old mines

Minor Likely 8 -

Medium


Confident

Treatment as detailed for each plant. Prechlorination - oxidises and filters out. Sedimentation will remove insoluables . Filters establish a coating that removes Mn Minor Rare 2 - Low


11 Source Iron



6 - Medium


Confident

Treatment as detailed for each plant. Prechlorination - oxidises and filters out Sedimentation will remove insoluables Filters establish a coating that removes Fe Insignificant Rare 1 - Low






Estimate

Treatment as detailed for each plant. Filtration or Flocculation/Sedimentation/ Filtration as detailed for each plant. Chlorination in all plants (disinfection) Minor Rare 2 - Low



Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident Treatment as detailed for each plant.

Minor Rare 2 - Low




ID# Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


14 Source Cyanotoxins

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

Confident

Only applies to a couple of catchments where it is monitored. Filtration, Ozone & BAC & alternate source management or Filtration and PAC or RO and source management used in these plants. Treatment as detailed for each plant. Moderate Rare 3 - Low






Confident

Treatment as detailed for each plant. Filtration/coagulation: in MV, Floc/Sed/Filter in JHWTP, Filtration in RB, CC is Floc, sed, filtered, Low level intakes from river Moderate Rare 3 - Low




14.3.3 Table: Existing and Proposed Preventative Measures for Amamoor

ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Disinfection (chlorination) by hypochlorite Procedures in place to protect from bypass events



2 Source Viruses



Extreme


Certain




3 Source Protozoa



Extreme


Certain

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Procedures in place to protect from bypass events



4 Source Turbidity & Colour


Moderate Likely 12 - High During high rainfall periods Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Disinfection (chlorination) by hypochlorite Procedures in place to protect from bypass events.



5 Source


Runoff Seasonal

Moderate Likely 12 - High Surface water sources are likely. Bores with tanins.

Confident More regular filter backwashing as indicated by headless during events.



6 Source Metals

Barium, Boron, Chromium, Manganese, Molybdenum, Nickel and Others

Moderate Likely 12 - High Metals monitored regularly Confident





ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


7 Reticulation Anions Chlorate Others

Moderate Likely 12 - High

Found in concentrations well below ADWG. By product of pre-dosing hypo to oxidise metals and having to maintain high chlorine residuals from plant due to direct feed into reticulation.

Confident Periodic monitoring program to determine possible poor performance.


Update plant to pre and post dosing of chlorine to lessen by-product production. Create clear water tank and dedicated trunk main to reservoir to lower required dosage of hypo. Continued monitoring and systems improvement required

8 Source Arsenic

Fertilizers (cropping) Septic systems Mining Activities Old Cattle Dips

Moderate Possibl

e 9 -

Medium Amamoor had some evidenced Reliable

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration.



9 Source Manganese


Minor Likely 8 -

Medium


Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Prechlorination - oxidises and aids filtration. Sedimentation will remove insoluables . Filters establish a coating that removes Mn Minor Rare 2 - Low


10 Source Iron Soil Make-up Runoff


6 - Medium


Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Prechlorination - oxidises and aids filtration. Sedimentation will remove insoluables . Filters establish a coating that removes Mn Insignificant Rare 1 - Low




14.3.4 Table: Existing and Proposed Preventative Measures for Goomeri ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Procedures in place to protect from bypass events



2 Source Viruses



Extreme


Certain

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Chlorination Procedures in place to protect from bypass events



3 Source Protozoa



Extreme


Certain

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction. Procedures in place to protect from bypass events



4 Source Turbidity & Colour


Moderate Likely 12 - High Off-stream storage use minimised when carry through from harvesting is high.

Confident

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Procedures in place to protect from bypass events



5 Source




Confident

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Procedures in place to protect from bypass events Moderate Rare 3 - Low


6 Source Metals Barium, Boron, Chromium, Manganese, Molybdenum, Nickel

Moderate Likely 12 - High SNAP test results show some low level signs Metals monitored regularly

Confident Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Moderate Rare 3 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


and Others

Ozone(during algal outbreaks); BAC filtration (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. By product of dosing hypo to maintain high chlorine residuals from plant due to direct feed into reticulation.




8 Source Arsenic


Moderate Possibl

e 9 -

Medium Goomeri off-stream storage showed some levels around 10% of limit.

Reliable

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Chlorination Procedures in place to protect from bypass events. Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low



Hardness Salinity

Moderate Possibl

e 9 -


Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Chlorination Procedures in place to protect from bypass 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


10 Source Manganese


Minor Likely 8 -

Medium

Seasonal events are evident from the water quality data. There are so many possible causes that it is not always clear.

Confident

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Chlorination Procedures in place to protect from bypass events. Prechlorination - oxidises and filters out. Sedimentation will remove insoluables Filters establish a coating that removes Mn Minor Rare 2 - Low



Hardness Salinity

Moderate Possibl

e 9 -

Medium Plant designed to handle specific problem Reliable

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Blended raw water Ion exchange softener. Monitored Moderate Rare 3 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


12 Source Iron



6 - Medium

Seasonal events are evident from the water quality data. These occur in storage turnover , flooding, significant rainfall, low rainfall. There are so many possible causes that it is not always clear.

Confident

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Chlorination Procedures in place to protect from bypass events. Sedimentation will remove insoluables Filters establish a coating that removes Fe Insignificant Rare 1 - Low


13 Source Iron Bacteria

Growth of bacteria in the bore, can occur in reticulation system

Minor Possibl

e 6 -


Confident Chemically treating bores (Envirobore),Sand filtration removes particles. Maintain chlorine residual. Raw water colour is indicative. Minor Rare 2 - Low



Minor Likely 8 -

Medium Monitored half yearly. Confident

Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Chlorination Softening; pH correction; Chlorination Procedures in place to protect from bypass events. Minor Rare 2 - Low



Toxic algal blooms Moderate Rare 3 - Low Reduced use of off-stream storage during algae blooms

Confident

Filtration, Ozone & BAC & alternate source management used . Treatment: Water is treated by means of the following process: Flocculation & Settling; Sand Filtration; Ozone(during algal outbreaks); BAC filtration (during algal outbreaks); Procedures in place to protect from bypass events. Moderate Rare 3 - Low




14.3.4 Table: Existing and Proposed Preventative Measures for Gympie ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain

Coagulation, sedimentation, filtration, pH correction and disinfection Procedures in place to protect from bypass events



2 Source Viruses



Extreme

Assume that there is always Bacteria is in the source water. Cattle can access the river, its almost certain the they contaminate the water with bacteria. Other animals may also contaminate water. A number of townships within the catchments are not sewered. System of monitoring septic systems cannot be relied upon

Certain




3 Source Protozoa



Extreme


Certain

Coagulation, sedimentation, filtration, pH correction Procedures in place to protect from bypass events



4 Source Turbidity


Moderate Likely 12 - High Some plants have very low likelihood Confident Coagulation, sedimentation, filtration, pH correction and disinfection



5 Source

Organic Matter - Suspended & Dissolved


Moderate Likely 12 - High Surface water sources are likely. Bores with tanins.

Confident Coagulation, sedimentation, filtration, pH correction and disinfection



6 Source Metals

Barium, Boron, Chromium, Manganese, Molybdenum, Nickel and Others


Confident

Coagulation, sedimentation, filtration, pH correction Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


7 Source Anions

Chlorate , Bromate , Fluoride, Sulphate , Nitrate Others




8 Source Arsenic



Medium


Reliable




Hardness Salinity






Toxic algal blooms Moderate Possible 9 -

Medium Alerted of algal blooms in Dam Confident

Coagulation, sedimentation, filtration, pH correction Low level intakes from river Varying off-take levels from dam Moderate Rare 3 - Low


11 Source Manganese


Minor Likely 8 -

Medium


Confident

Coagulation, sedimentation, filtration, pH correction Sedimentation will remove insoluables . Filters establish a coating that removes Mn Minor Rare 2 - Low


12 Source Iron



6 - Medium


Confident

Coagulation, sedimentation, filtration, pH correction Sedimentation will remove insoluables Filters establish a coating that removes Fe Insignificant Rare 1 - Low






Estimate Coagulation, sedimentation, filtration, pH correction

Minor Rare 2 - Low



Minor Unlikely 4 - Low Monitored half yearly in raw water. Confident Coagulation, sedimentation, filtration, pH correction and disinfection Minor Rare 2 - Low






Confident Coagulation, sedimentation, filtration, pH correction





14.3.5 Table: Existing and Proposed Preventative Measures for Imbil ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk




Catastrophic

Almost Certain

25 - Extreme


Certain




2 Source Viruses


Catastrophic

Likely 20 -

Extreme


Certain




3 Source Protozoa


Catastrophic

Likely 20 -

Extreme


Certain




4 Source Turbidity


Moderate Likely 12 - High During high rainfall periods and dam turn-over Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Disinfection (chlorination) by hypochlorite Procedures in place to protect from bypass events. Different off-take levels in dam



5 Source


Runoff Seasonal

Moderate Likely 12 - High Surface water sources are likely. Confident Different off-take levels in dam More regular filter backwashing as indicated by headless during events.



6 Source Metals

Barium, Boron, Chromium, Manganese, Molybden, Nickel and Others









Update plant to pre and post dosing of chlorine to lessen by-product production. Create clear water tank and dedicated trunk main to reservoir to lower required dosage of hypo. Continued monitoring and systems improvement required



ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


8 Source Arsenic


Moderate

Possible 9 -

Medium Some evidenced Reliable




9 Source Manganese


Minor Likely 8 -

Medium


Confident




Insignificant

Almost Certain

6 - Medium


Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Prechlorination - oxidises and aids filtration. Sedimentation will remove insoluables Filters establish a coating that removes Mn Insignificant Rare 1 - Low




14.3.6 Table: Existing and Proposed Preventative Measures for Kandanga ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk




Catastrophic

Almost Certain

25 - Extreme


Certain

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Disinfection (chlorination) by hypochlorite Procedures in place to protect from bypass events Catastroph

ic Rare 6 - Medium


2 Source Viruses


Catastrophic

Likely 20 -

Extreme


Certain

Treatment: Dosing to promote coagulateion, followed by high pressure sand media filtration. Disinfection (chlorination) by hypochlorite Procedures in place to protect from bypass events Catastroph

ic Rare 6 - Medium


3 Source Protozoa


Catastrophic

Likely 20 -

Extreme


Certain


Catastrophic Rare

6 - Medium


4 Source Turbidity


Moderate Likely 12 - High During periods of high rainfall Confident




5 Source


Runoff Seasonal

Moderate Likely 12 - High Surface water sources are likely. Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Disinfection (chlorination) by hypochlorite Procedures in place to protect from bypass events More regular filter back-washing as indicated by headless in high turbidity periods Moderate Rare 3 - Low


6 Source Metals

Barium, Boron, Chromium, Manganese, Molybden, Nickel and Others









Update plant to pre and post dosing of chlorine to lessen by-product production. Create clear water tank and dedicated trunk main to reservoir to lower required



ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


dosage of hypo. Continued monitoring and systems improvement required

8 Source Arsenic


Moderate Possibl

e 9 -

Medium Amamoor had some evidenced Reliable




9 Source Manganese


Minor Likely 8 -

Medium

Seasonal events are evident from the water quality data. These occur in dam turnover at barumba, flooding, significant rainfall, low rainfall. There are so many possible causes that it is not always clear.

Confident




Insignificant

Almost Certain

6 - Medium


Confident

Treatment: Dosing to promote coagulation, followed by high pressure sand media filtration. Prechlorination - oxidises and aids filtration. Sedimentation will remove insoluables . Filters establish a coating that removes Mn

Insignificant Rare 1 - Low




14.3.6 Table: Existing and Proposed Preventative Measures for Kilkivan ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain

Treatment: Dosed low pressure sand filter; RO filtration; Chlorination. Procedures in place to protect from bypass events



2 Source Viruses



Extreme


Certain




3 Source Protozoa



Extreme


Certain




4 Source Turbidity


Moderate Likely 12 - High Off-stream storage use minimised when carry through from harvesting is high.

Confident




5 Source

Organic Matter - Suspended & Dissolved



Confident

Treatment: Dosed low pressure sand filter; RO filtration; Chlorination. Chlorination in all plants(disinfection) Moderate Rare 3 - Low


6 Source Metals

Barium, Boron, Chromium, Manganese, Molybdenum, Nickel, lead and Others


Confident

Treatment: Dosed low pressure sand filter; RO filtration Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low




Found in concentrations well below ADWG. By product of dosing hypo to maintain high chlorine residuals from plant due to






ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


direct feed into reticulation.

8 Source Arsenic



Medium Kilkivan > 10% of limit. Reliable

Treatment: Dosed low pressure sand filter; RO filtration; Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low



Hardness Salinity


Medium Depends on Raw water blend Reliable

RO , blended product to prevent too much softness. Monitored Moderate Rare 3 - Low


10 Source Manganese


Minor Likely 8 -

Medium


Confident Treatment: Dosed low pressure sand filter; RO filtration;

Minor Rare 2 - Low


11 Source Iron



6 - Medium


Confident Treatment: Dosed low pressure sand filter; RO filtration; Chlorination.



12 Source Iron Bacteria

Growth of bacteria in the bore, can occur in reticulation system

Minor Possible 6 -


Confident

Chemically treating bores (Envirobore),Sand filtration removes particles. Maintain chlorine residual. Raw water colour is indicative. Minor Rare 2 - Low



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

Confident RO and source management used in this plant. Moderate Rare 3 - Low




14.3.7 Table: Existing and Proposed Preventative Measures for Rainbow Beach ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain

Closed system pH correction, filtration and chlorination. Disinfection (chlorination) Procedures in place to protect from bypass events



2 Source Viruses



Extreme


Certain

Closed system pH correction, filtration and chlorination. Disinfection (chlorination) Procedures in place to protect from bypass events



3 Source Protozoa



Extreme


Certain

Closed system pH correction, filtration . Procedures in place to protect from bypass events



4 Source Metals Barium, Boron, Chromium, copper, lead, manganese, nickel and others


Confident

Closed system pH correction, filtration and chlorination. Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low


5 Source pH Soil Make-up Lack of buffering in raw water

Minor Almost Certain

10 - High Correction always required Confident




Hardness Salinity



Monitored at all plants and treatment as described for each plant Moderate Rare 3 - Low


7 Source Manganese


Minor Likely 8 -

Medium Present in bore water Confident

Closed system pH correction, filtration and chlorination. Sedimentation will remove insoluables Filters establish a coating that removes Mn Minor Rare 2 - Low


8 Source Iron



6 - Medium

Present in bore water Confident

Closed system pH correction, filtration and chlorination. Filters establish a coating that removes Fe Insignificant Rare 1 - Low




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

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-ainty

Existing Preventive Measures Conse-quence

Likeli-hood

Maximum Risk





25 - Extreme


Certain




2 Source Viruses



Extreme


Certain




3 Source Protozoa



Extreme


Certain

Coagulation, sedimentation, filtration, pH correction Procedures in place to protect from bypass events



4 Source




Confident Coagulation, sedimentation, filtration, pH correction and disinfection



5 Source Metals Barium, Boron, Chromium, copper, lead, manganese, nickel and others


Confident

Coagulation, sedimentation, filtration, pH correction Periodic monitoring program to determine possible poor performance. Moderate Rare 3 - Low


6 Source pH

Soil Make-up Tannin in Water Lack of buffering in raw water

Minor Almost Certain

10 - High Correction always required Confident




Hardness Salinity

Moderate Possibl

e 9 -




8 Source Manganese


Minor Likely 8 -

Medium

Seasonal events are evident from the water quality data, flooding, significant rainfall, low rainfall. There are so many possible causes that it is not always clear.

Confident

Coagulation, sedimentation, filtration, pH correction Sedimentation will remove insoluables . Filters establish a coating that removes Mn

Minor Rare 2 - Low




ID#

Treatment Phase


Likeli-hood

Maximum Risk

Comments Uncert-


Conse-quence

Likeli-hood

Maximum Risk


9 Source Iron



6 - Medium


Confident

Coagulation, sedimentation, filtration, pH correction Sedimentation will remove insoluables Filters establish a coating that removes Fe





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

revision Target

Revision Date

WS-Q-001

Water & Sewerage Branch Quality

Manual

The quality manual which applies to all activities carried out by the Water & Sewerage

Branch Division. Detailing Quality Management System, Management Responsibility,

Resource Management, Product and Service

Requirements, Monitoring and Measurement.

20/10/2010 28/06/2016

WS-Q-002 Management Review Structure Organisational Chart 23/2/2010 28/06/2016

WS-Q-003 Water & Sewerage Branch Quality

Numbering System Document Control Numbering System

24/2/2010 28/06/2016

WS-Q-004 Document and Record Control Details controls on

documentation types, and the personnel responsible

20/10/2010 28/06/2016

WS-Q-101 Jones Hill WTP Quality Plan

(Gympie WTP) Outlines quality management requirements for the Scheme • Water Quality Parameters • Water Quality Testing

• Operations • Maintenance • Contingencies

5/5/2010 28/06/2016

WS-Q-301 Tin Can Bay / Cooloola Cove WTP

Quality Plan 20/10/10 28/06/2016

WS-Q-351 Rainbow Beach WTP Quality Plan 20/10/10 28/06/2016 WS-Q-501 Imbil WTP Quality Plan 16/12/10 28/06/2016 WS-Q-541 Kandanga WTP Quality Plan 16/12/10 23/12/2016 WS-Q-571 Amamoor WTP Quality Plan 20/10/10 23/12/2016 WSQ700 Kilkivan WTP Quality Plan 20/12/2012 20/12/2016



Document Title Description Date of last revision

Target 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

(Thermo-tolerant Coliforms & E coli)

Standard Chemical Analysis Standard Metals Screening

Frequency Refer to Table 14.6.2

Six-Monthly Annually

Sampling Locations

Treated water only: All water treatment plants and other specified locations

Treated water: All water treatment plants; and Raw water: All water treatment plant raw water intakes

Treated water: All water treatment plants; and Raw water: All water treatment 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

http://webbie/intranet/ALL/all/COMP201.pdf



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 Code

Sample Location Description Monthly or Rotated

GYMPIE G1 Dalee Street Pump Station, Jones Hill Tap in right hand corner of compound on

top of pipe work M

G2 Lindsay Street Reservoir – Lindsay Street, Southside

Tap on outside wall of valve pit R

G3 Ferguson Hill Low Level Reservoirs – Old Maryborough Road, Gympie

Tap in front of low level reservoir M

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 pump station

R

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 nursery near car park

R

G8 Parsons Road Park, Parsons Road, Gympie Tap on side of power pole in front of park sign

R

G9 Thurecht Park – Pine Street, Gympie Tap on side of Thurecht Park sign R

G10 Andrew Fisher Memorial Park – Cogan Street, Gympie

Tap along Cogan St out in open just along from sign

R

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

tank stand M

KL2 Council Workshop, Bligh Street, Kilkivan Tap front left hand side of workshop shed.

M

RAINBOW BEACH R1 Rainbow Beach Water Treatment Plant –

Rainbow Beach Road Tap on exterior of control room M

R2 Laurie Hanson Park – Kirchner Avenue, Rainbow Beach

Tap in middle of park (behind toilet block)

R

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

Plant – Queen Elizabeth Drive Tap on back wall of control room building

M

C2 Queen Elizabeth Drive, Cooloola Cove – near Nautilus Drive

Tap on balustrade of picnic bench at parkland behind convenience store

R



Site Code

Sample Location Description Monthly or 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,

Goomeri Tap under the front of the building between the two sets of stairs

M

GM2 Qld Rural Fire Brigade Shed, Moore Street, Goomeri

Tap on front right hand corner of building

M

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)



14.6.6 Table: Amamoor Water Quality Testing

Parameter Frequency

Raw/source water Treated water from

water treatment plant Transmission Reticulation

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



Cyanobacterial toxins E E E Radionuclides E E E

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

14.6.7 Table: Goomeri Water Quality Testing

Parameter Frequency


water treatment plant Transmission Reticulation

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 Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E


14.6.8 Table: Gympie Water Quality Testing

Parameter

Frequency


water treatment plant

Transmission Reticulation

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



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


14.6.9 Table: Imbil Water Quality Testing

Parameter

Frequency




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 Cyanobacterial toxins E E E Radionuclides E E E


14.6.10 Table: Kandanga Water Quality Testing

Parameter

Frequency




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 Cyanobacterial toxins E E E Radionuclides E E E




14.6.11 Table: Kilkivan Water Quality Testing

Parameter

Frequency




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



Algae/Cyanobacterial counts E E E Cyanobacterial toxins E E E Radionuclides E E E


14.6.12 Table: Rainbow Water Quality Testing

Parameter

Frequency




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



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


14.6.13 Table: Tin Can Bay / Cooloola Cove Water Quality Testing

Parameter

Frequency




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



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




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, Water & Sewerage Branch

Devise long-term response strategies onsite. Document and assess emergency event and failure response. Notify Authorities of emergencies.

Operations Manager- Infrastructure Services Directorate

Notification of General Manager, Water & Sewerage Branch. Short term emergency response. Repairs to networks.

Manager- Treatment & Compliance and/or Treatment Plant Superintendent, Water & Sewerage Branch

Notification of General Manager, Water & Sewerage Branch. Short term emergency response. Event logging of the emergency event.

Environmental Health Officer- Health & Environmental Services Branch- Planning Directorate

Verification Monitoring and reporting to General Manager and Manager-Treatment & Compliance - Water & Sewerage Branch

Plant Operator-In-Charge or Plant Operator

Immediate emergency response. 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



14.7.2 Table: Incident / Emergency Levels

14.7.3 Management of Incidents and Emergencies Level

Incident or emergency

Summary of actions to be taken (with documented procedure listed)

Position/s responsible for Action/s

1

Excedence of Operational Limit

• Retest to verify. • Follow Quality Plan sub-documents (see below). • Raise a CAR (Corrective Action Request) • (refer to W&S Quality Plan and links in the

Appendices) • Forward to Manager- Treatment & Compliance • Assess changes that may be advised to procedures

and/or operationally

Operator Operator Operator Operator Manager- Treatment &

Compliance

2 Aesthetic guideline breached

• Customer complaints recorded on Job Sheet WSF001 • Investigate issue, fix.

o Raise a CAR (Corrective Action Request) o (refer to W&S Quality Plan and links in the

Appendices) o Forward to Manager- Treatment &

Compliance o Assess changes that may be advised to

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

Council Officer Operator and

Treatment Plant Superintendent (aesthetic)

Manager- Treatment & Compliance

Incident / Emergency

level

Description of 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



Level

Incident or emergency

Summary of actions to be taken (with documented procedure listed)

Position/s responsible for Action/s

Branch (available on the internet) 2 Minor service

interruption For example, leak.

• Customer complaints recorded on Job Sheet WSF001 • Investigate issue, fix. Notify customers of supply

interruption where appropriate.

• Notify General Manager, Water & Sewerage Branch • Incident recorded, tracked and reported against

Customer Service Standards for Water & Sewerage Branch (available on the internet)

Council Officer Plumber and

Operations Manager

Operations Manager Manager- Treatment &

Compliance

3 Health guideline breached Operational testing; Verification Testing; Boil Water Incident

• Customer complaints recorded on Job Sheet WSF001 • Notify W&S Branch (Verification Monitoring)

• Notify General Manager, Water & Sewerage Branch

• Investigate issue, fix. • Test water if required, both at the site and in nearby

mains • Incident Management by personnel per Table 14.7.1.,

including issue of boil water or other notice as required.

• Incident recorded, tracked and reported against 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.

Council Officer Environmental Health

Officer Manager- Treatment &

Compliance Operator, EHO and

Treatment Plant Superintendent

General Manager, Water & Sewerage Branch


3 Major supply interruption For example, breakage identified

• Customer complaints recorded on Job Sheet WSF001 • Notify General Manager, Water & Sewerage Branch • Notify customers of supply interruption where

appropriate. • Investigate issue, fix. • Incident recorded, tracked and reported against

Customer Service Standards for Water & Sewerage Branch (available on the internet)

Council Officer Operations Manager Operations Manager

and Plumber Manager- Treatment &

Compliance

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.



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.



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

Proposed Preventative Measure Priority Complete By

END of: Responsibility

Review the system and formal procedure for capturing water quality complaints;

Low Dec 2016 General Manager, Water

& Sewerage Branch Develop a system to monitor supply quality of treatment chemicals, with the aim of maintaining a register;

Medium Jun 2016 Manager- Treatment &

Compliance Review requirement for online continuous monitoring for Chlorine Residual (to ensure disinfection) and Turbidity (to ensure filter breakthrough has not occurred)

High Complete Manager- Treatment &

Compliance

Review inspection, cleaning and routine maintenance schedules for reservoirs

Medium Jun 2016 Manager- Treatment &

Compliance Review requirements for alarming of chlorine / poly dosing pump failures

High Jan 2016 Manager- Treatment &

Compliance Review communication protocols with emergency departments, requesting alerts for any activity in the area

High Jun 2016 General Manager, Water

& Sewerage Branch Monitor the results of filter media changes, especially concerning monitoring of Mn and Fe values

Low On-going Manager- Treatment &

Compliance Review and document frequency of pesticide analysis for Schemes (eg. Programmed and event-based)

Low Dec 2016 Manager- Treatment &

Compliance Review frequency and document SWA on raw, treated and reticulated water for the Schemes

Medium Complete Manager- Treatment &

Compliance Review frequency of testing for potentially toxic cyanobacteria species during high risk seasons where applicable


Compliance Review reticulation repair procedures, work method statements and work instructions and equipment cleansing for cross-contamination with sewage

High Jun 2016 Operations Manager

Infrastructure Services

Revise and implement Site Based Management Plans for each High Jun 2016 Manager- Treatment &



Proposed Preventative Measure Priority Complete By

END of: Responsibility

site, with Emergency Response Compliance Instigate a system and formal procedure for sampling and testing reticulated water supplies for disinfection by-products

Low Complete Manager- Treatment &

Compliance Review the storage of Sodium Hypochlorite to ensure shelf life not exceeded, reducing degradation of the disinfection efficiency of the liquid as well as taste and odour by-products of degradation.


Compliance

Review frequency of fluoride testing in schemes where fluoride is dosed for medication

Low Complete General Manager, Water

& 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 used accidentally

Medium Jun 2016 Manager- Treatment

& Compliance At Goomeri, develop a procedure for proportion of source water from bores and off-stream storage, with particular consideration of the water softener


& Compliance

Review and implement a Quality Plan for Kilkivan and Goomeri Water Treatment Plants

High Complete

d Manager- Treatment

& Compliance 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


& Compliance

Develop a program for test for blue green algae and possible toxins at Goomeri and Kilkivan off-stream storage


& Compliance Review frequency of testing for metals, especially those with historical data in the Schemes (Arsenic & Cyanide)

Low Dec 2016 Manager- Treatment

& Compliance Engage in review of risk assessment for each source

Low Jun 2016 Manager- Treatment

& 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 historical data in the Imbil Scheme

Low Dec 2016 Manager- Treatment &

Compliance 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.

High Complete Manager- Treatment &

Compliance

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

High Dec 2016 Manager- Treatment &

Compliance

Review specifications for pre-Chlorination for effective oxidation at all Mary Valley Plants


Compliance



15.2.4 Risk Management Improvement Program, Gympie

Proposed Preventative Measure Priority Time-frame

Responsibility

A plant bypass has never been used but still exists, Resolve procedures to prevent unauthorised opening and install physical barriers for the Bypass.

Medium Jun

2016 Manager- Treatment &

Compliance

Review frequency of testing for metals, especially those with historical data in the Scheme

Low Dec 2016


Review maintenance frequency and procedures on Fluoride Dosing, including calibrations.

Medium Compl

ete Manager- Treatment &

Compliance

15.2.5 Risk Management Improvement Program, Tin Can Bay/Cooloola Cove


Responsibility

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

High Jan


Compliance

At Cooloola Cove Water Treatment Plant, review maintenance frequency and procedures on Fluoride Dosing, including calibrations

Medium Compl


Compliance Review requirements for flow switch on Clearwater at Cooloola Cove Water Treatment Plant before post dosing begins.

High Jan


Compliance

15.2.6 Risk Management Improvement Program, Rainbow Beach


Responsibility

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

High Jan


Compliance

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;

High Compl


Compliance



Service Provider No SP 485

DRINKING WATER QUALITY MANAGEMENT PLAN 2012

APPENDICIES



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)



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

http://webbie/intranet/ALL/all/PRWS002.pdf




http://webbie/intranet/ALL/all/WSMP130.pdf



http://webbie/intranet/ALL/all/WSSLMP.pdf



















http://webbie/intranet/ALL/all/FSP173.pdf

http://webbie/intranet/ALL/all/FSWI192.pdf




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








http://webbie/intranet/ALL/all/WSP001.pdf
















http://webbie/intranet/ALL/all/WSCP101.pdf





















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















http://webbie/intranet/ALL/all/WSWI011.pdf

http://webbie/intranet/ALL/all/WSWMS001.pdf
































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













http://webbie/intranet/ALL/all/WSC101.pdf










http://webbie/intranet/ALL/all/WST101.pdf






























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


































http://webbie/intranet/ALL/all/WSF001.pdf





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



http://webbie/intranet/ALL/all/WSF008.doc








http://webbie/intranet/ALL/all/CSF307.pdf



http://webbie/intranet/ALL/all/WSF019.doc

http://webbie/intranet/ALL/all/WSF070A.pdf

http://webbie/intranet/ALL/all/WSF070B.pdf



































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



http://webbie/intranet/ALL/all/WSR001.pdf











http://webbie/intranet/ALL/all/WSS101.pdf











http://webbie/intranet/ALL/all/WSI002.pdf






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













http://webbie/intranet/ALL/all/PBF041.pdf



http://webbie/intranet/ALL/all/FSF369.doc

http://webbie/intranet/ALL/all/FSF370.pdf

http://webbie/intranet/ALL/all/FSP364.pdf

http://webbie/intranet/ALL/all/COMP201.pdf

http://webbie/intranet/ALL/all/LDP100_START_HERE.pdf

http://webbie/intranet/ALL/all/LDP100_START_HERE.pdf

http://webbie/intranet/ALL/all/OCP161.pdf

http://webbie/intranet/ALL/all/OCF160.pdf

http://webbie/intranet/ALL/all/OCF163.pdf

http://webbie/intranet/ALL/all/WHSI034.pdf

http://webbie/intranet/ALL/all/WHSI035.pdf



18 Water & Sewerage Quality Manual WSQ001.pdf






19 Quality Plan for Amamoor Water Treatment Plant





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





21 Quality Plan for Imbil Water Treatment Plant





22 Quality Plan for Kandanga Water Treatment Plant





23 Quality Plan for Rainbow Beach Water Treatment Plant





24 Quality Plan for Kilkivan Water Treatment Plant





25 Quality Plan for Goomeri Water Treatment Plant





26 Quality Plan for Cooloola Cove Water Treatment Plant





27 Procedure for Collecting Drinking Water Samples



28 Local Disaster Management Plan LD-P-100





29 Universal Key for Plant & Network Diagrams

Bore

ValveTelemetry

Pump Station

Raw Water

Network Water

Process Water

Process Water

Process WaterValve/

Hydrant

Universal Diagram Key

Date post:	30-May-2020
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