yearly dwqmp report july 2015 to june 2016 30082016 · this scheme supplies water to approximately...

Drinking Water Quality Management Plan (DWQMP) Report June 2015 to July 2016

Burdekin Shire Council SPID: SP25

145 Young Street

AYR QLD 4807

Phone: 07 47839800

Email: [email protected]

Ayr Water Tower Home Hill Water Tower

Giru Water Tower

Table of Contents

1. Introduction 3

2. Overview of Operations (optional) 3

3. Actions taken to implement the DWQMP 3

Progress in implementing the risk management improvement program 3

Revisions made to the operational monitoring program to assist in maintaining the compliance with water quality criteria in verification monitoring. 5

Amendments made to the DWQMP 5

Future Amendments to be made to the DWQMP 5

4. Compliance with water quality criteria for drinking water 6

5. Notifications to the Regulator under Sections 102 or 102A of the Water Supply (Safety and Reliability) Act 2008 6

Non-compliances: 6

6. Customer complaints related to water quality 7

Suspected Illness 7

Discoloured water 8

Taste and odour 8

7. Findings and recommendations of the DWQMP auditor 8

Hazards and hazardous events that affected the quality of drinking water during the year and which were not addressed in the DWQMP 8

Appendix A – Summary of compliance with water quality criteria 9

Table 3 - Reticulation E. coli verification monitoring 13

Appendix B – Implementation of the DWQMP Risk Management Improvement Program 17

Glossary of terms

< Less than

> Greater than

ADWG 2004 Australian Drinking Water Guidelines (2004). Published by the National Health and Medical Research Council of Australia

ADWG 2011 Australian Drinking Water Guidelines (2011). Published by the National Health and Medical Research Council of Australia

BSC Burdekin Shire Council

CFU/100mL Colony forming units per 100 millilitres

CO2 Carbon Dioxide

DEWS Department of Energy and Water Supply

DWQMP Drinking Water Quality Management Plan

E. coli Escherichia coli, a bacterium which is considered to indicate the presence of faecal contamination and therefore potential health risk

HACCP Hazard Analysis and Critical Control Points certification for protecting drinking water quality

mg/L Milligrams per litre

MPN/100mL Most probable number per 100 millilitres

NTU Nephelometric Turbidity Units

THM’s Trihalomethanes

TOC’s Total Organic Carbons

1. Introduction

This report documents the performance of Burdekin Shire Council’s drinking water service with respect to water quality and performance in implementing the actions detailed in the drinking water quality management plan (DWQMP) as required under the Water Supply (Safety and Reliability) Act 2008 (the Act).

The report assists the Regulator to determine whether the approved DWQMP and any approval conditions have been complied with and provides a mechanism for providers to report publicly on their performance in managing drinking water quality.

This template has been prepared in accordance with the Water Industry Regulatory Reform – drinking water quality management plan report factsheet published by the Department of Energy and Water Supply, Queensland, accessible at www.dews.qld.gov.au.

2. Overview of Operations

The Ayr/Brandon Water Supply System sources water from eight bores at South Ayr, six bores at Nelsons Lagoon, one bore at Council Chambers and four bores at Conlan Street. Treatment comprises of aeration prior to disinfection at the South Ayr reservoir site only. Water is disinfected using 10% sodium hypochlorite solution prior to reticulation. This scheme supplies water to approximately 10,300 people.

The Home Hill Water Supply System sources water from eight bores in Home Hill. Treatment comprises aeration at the Home Hill Water Tower for removal of CO2. Water is disinfected using 10% sodium hypochlorite solution prior to reticulation. This scheme supplies water to approximately 3,100 people. There are also two emergency bores at an alternate location that discharge directly into the reticulation following disinfection at the bore site.

The Mount Kelly Water Supply System sources water from three underground Bores. Treatment comprises aeration of raw water at the Mount Kelly reservoir prior to disinfection. Water is disinfected using 10% sodium hypochlorite solution prior. This scheme supplies water to approximately 400 people.

The Giru township is supplied water from Townsville City Council’s Giru/Cungulla Water Treatment Plant which sources water from the Haughton River. This treatment plant is under the control of Townsville City Council. The Burdekin Shire purchases treated water from Townsville Water and performs secondary disinfection using 10% sodium hypochlorite solution prior to reticulation. This scheme supplies water to approximately 600 people.

3. Actions taken to implement the DWQMP

Progress in implementing the risk management improvement program

The Burdekin Shire Council DWQMP was created on 31 July 2012, reviewed by DEWS with amendments recommended by DEWS being completed on 2 September 2013. Final approval by DEWS was received on 13 November 2013. An internal review of this Plan was conducted on 6 November 2015 with updates/amendments finalised by 31st December 2015. The minutes of this review meeting are attached.

To ensure quality of water in the reticulated areas of the Burdekin, this DWQMP was developed in accordance with the Department of Environment and Resource Management’s Drinking Water Quality Management Plan Guidelines (September 2010) to:

• Comply with the requirements of the Water Supply (Safety and Reliability) Act 2008

• Comply with the requirements of the Public Health Act 2005 and Public Health Regulation 2005

See Appendix I of the DWQMP: Risk Management Improvement Program (attached) for progress in implementing Risk Management Improvement Program actions.

Virtualisation of the SCADA server controlling the Water Wastewater network has occurred improving network redundancy.

In addition to Bores 2 and 7 at South Ayr borefield having previously being abandoned, Bores 5, 8 and 17 at the South Ayr borefield have been taken off line due persistent iron and manganese levels above the ADWG aesthetic guideline values. A decision to abandon or retain these bores will be made in the next reporting period depending on the outcome of further quality testing.

Variable speed drive pump sets are currently being installed at the Ayr Water Tower and the South Ayr low level reservoir. The project is to enable Council to increase the reticulation network water pressures and maintain positive flows within the network. This project has commenced and is due for completion by October 2016. As part of this project, existing hi-lift pumps 2, 3 and 4 at the South Ayr low level reservoir have been removed. The existing hi-lift pump 1 will be retained as a stand-by emergency pressure pump should the variable speed drive pump set at South Ayr fail. One of the removed hi-lifts will also be retained as a spare, with the ability for it to be installed in the event of an emergency.

Upgrades of Council’s chlorination disinfection systems are scheduled to be carried out at the Nelsons Lagoon and South Ayr sites as part of the variable speed pump upgrade project.

The remainder of chlorination disinfection systems at Critical control points at Conlan Street, Mount Kelly, Home Hill and Giru will be upgraded in the 2016/17 financial year. Additional chlorine monitoring test sites are being introduced throughout the Shire to improve residual monitoring in low consumption areas and low flow rural areas.

An internal investigation following a high chlorine incident in the Shirbourne area of Giru, highlighted the need for additional scours to be installed as an improvement action on Council’s low flow rural area mains. These have been identified as an action to be undertaken in the short to medium term.

Continuation of a mains cleaning program in the Ayr/Brandon network involving air scouring and swabbing of water mains was carried out throughout the financial year 2015/2016. Installation of swabbing points on the 500mm distribution main coming from South Ayr low level reservoir in Burke Street, Ayr has been completed. This main was swabbed on 28th June, 2016 and has resulted in a dramatic reduction in the incidence of discoloured water issues.

Monitoring of Heterotrophic Plate Counts at all water quality sampling points commenced in April and will continue at monthly intervals to establish baseline results and will be taken at quarterly recurrence intervals from October 2016. These results indicate that the reticulation network is quite clean with typical cfu/ml counts less than 80.

Work method statements, procedures and risk assessments are being updated and improved as part of our ongoing process improvement policy.

Emergency back-up generators are test run on a fortnightly basis to ensure they maintain operational capability.

A pre-disaster checklist for Water Wastewater has been created which ensures the following:

• Emergency generators tested and fuelled

• Priority agreement to supply emergency generators at all other critical water supply sites with Ergon Energy

• Hypochlorite tanks are filled and have reserve capacity for disaster situations

• Water reservoirs are filled

• All plant and equipment is secured

• VSD pumps at the South Ayr and the Ayr Water Tower will be switched off and isolated prior to a disaster reverting back to the Ayr Water Tower to provide system pressures.

Revisions made to the operational monitoring program to assist in maintaining the compliance with water

quality criteria1 in verification monitoring.

Revisions have been made to the operational monitoring program contained in Appendix J of the DWQMP to include the following:

• Testing for the presence of E.coli in raw water at bore pumps

• Heterotrophic Plate Count testing at each reticulation network sample point

• Trihalomethane testing at each sample point

Amendments made to the DWQMP

At the internal review meeting on 6 November 2015, the following amendments were made:

• BSC’s DWQMP was amended to include new bores commissioned at Conlan Street, Ayr

• reflect changes in key personnel and relevant positions

• Bores 5, 8 & 17 South Ayr are currently isolated and being test pumped to monitor iron and manganese levels. A decision to abandon or retain these bores will be made in the next reporting period

• Additional swabbing points in Burke Street have been installed

• An automatic flushing unit was installed at a trial site in an effort to improve low chlorine residuals and water quality in dead ends. This unit is set up with a timer to automatically flush a set amount of water at set intervals. Further units may be added to dead ends dependant on trial outcomes.

• Water and Waste Water procedures are in the process of being updated to include a Risk Matrix

• Verification Monitoring Testing has been amended to include the following:

o Testing for the presence of E.coli in raw water at bore pumps

o Heterotrophic Plate Count testing at each reticulation network sample point

o Trihalomethane testing at each reticulation network sample point

• Appendix B - Ground Water Levels updated in DWQMP

• Appendix C - BOM rainfall data updated

• Appendix D - Raw and Treated Water Tables updated

• Appendix E – updated

Future Amendments to be made to the DWQMP

At the next review date, the DWQMP will be amended to reflect changes/improvements being made over the next financial year:

• Upgrading the SCADA system for water supply

• Installing a new electrical switchboard at South Ayr for increased network reliability

• Installing a variable speed drive pump set at the Ayr Water Tower for increased network pressure

1 Refer to Water Quality and Reporting Guideline for a Drinking Water Service for the water quality criteria for drinking water.

• Installing a variable speed drive pump set at South Ayr for increased network pressure

• Removal of hi-lift pumps 2, 3 and 4 at South Ayr low level reservoir. The existing hi-lift pump 1 will be retained as a stand-by emergency pressure pump should the variable speed drive pump set at South Ayr fail.

• Introduction of additional operational and verification monitoring test sites throughout the Shire

• Recognise the addition of scour valves on low flow rural water mains as a risk improvement action

• All updated work method statements, procedures and risk assessments to be added

• Bores 5, 8 and 17 South Ayr have been taken off line due to recurrent high iron and manganese levels. A decision to abandon or retain these bores will be made in the next reporting period

4. Compliance with water quality criteria for drinking water

Refer Appendix A of this document for summarised analysis results.

There were no E.coli detections for the financial year 2015/2016.

The latest upgrade of SWIMLocal has been installed and will be utilised as a water quality database manager as well as the reporting vehicle to the Department of Energy and Water Supply.

The services of Dr. Peter Mosse, Hydrological Pty. Ltd., were obtained during 2015/2016 to evaluate and provide an operational review of the Ayr, Brandon, Home Hill, Mt Kelly and Giru Water Supply Schemes. Recommendations for operational improvement have been prioritised and form part of Burdekin Shire Council’s ongoing improvement action plan and will be recognised in the review of the Drinking Water Quality Management Plan.

Two employees are currently completing a Certificate II Water Operations and one employee is undertaking an adult apprenticeship as a plumber.

A small laboratory is being planned in the 2016/17 budget. This will enable more in-house analysis to be carried out by qualified staff.

One non-compliance occurred during 2015/2016 financial year for detection of a chlorine residual >5mg/L. This was reported to the Water Regulator as shown in Section 5 below.

5. Notifications to the Regulator under Sections 102 or 102A of the Water Supply (Safety and Reliability) Act 2008

On 22 June, 2016 an ADWG exceedance for chlorine residual greater than 5mg/L was detected in the Shirbourne area at Giru.

The Regulator was notified of this incident under Sections 102 or 102A of the Water Supply (Safety and Reliability) Act 2008 – Incident No. DWI-7-25-00022.

There were no other notifiable incidents within any of the Burdekin Shire Council water schemes.

Non-compliances:

On 22 June, 2016 an ADWG exceedance for chlorine residual greater than 5mg/L was detected in the Shirbourne area of Giru. The Regulator was notified under Section 102 of the Water Supply Safety and Reliability Act 2008 as follows:

• Giru – Cungulla Water Treatment Plant – 56 Bahr Road, Giru – chlorine residual greater than 5mg/L detected on daily inspection run.

o While delivering chlorine to the Bahr Road Booster Station the Contractor had incorrectly filled the dilution tank as well as the storage tank.

o A scour valve was opened adjacent the booster station to immediately draw water away from customers and dump the non-compliant water.

o Residents (approx. 20) along this water main were contacted and advised.

o The hypochlorite dilution tank was drained and a fresh 100:1 ratio dilution added.

o Chlorine residuals were repeatedly taken at various points along this water main.

o Residents water meters were removed to flush pockets of high chlorine from house lines.

o Residents advised when chlorine residuals had returned to normal.

6. Customer complaints related to water quality

Burdekin Shire Council is required to report on the number of complaints, general details of complaints, and the responses undertaken.

Throughout the year the following complaints regards water quality were received:

Table 1 – total complaints regards water quality – 2015/2016 Financial Year

Suspected Illness Discoloured water Taste and odour Total

Ayr/Brandon Nil 243 7 250

Home Hill Nil Nil Nil Nil

Mt Kelly Nil Nil Nil Nil

Giru/Cungulla Nil Nil 1 1

Total Nil 243 8 251

Table 2 - complaints about water quality – 2014/2015 Financial Year for Comparison Purposes Only

Suspected Illness Discoloured water Taste and odour Total

Ayr/Brandon 242 8 250

Home Hill 2 1 3

Mt Kelly Nil Nil Nil

Giru/Cungulla Nil Nil Nil

Total 244 9 253

Suspected Illness

Burdekin Shire Council is dedicated to provide potable water to its customers and has a stringent monitoring/testing program in place throughout the Shire.

During 2015/2016, there were no confirmed cases of illness arising from Burdekin Shire Council’s water supply systems.

Discoloured water

- The presence of elevated level of iron and manganese from some production bores in the South Ayr borefield has been an ongoing issue for Burdekin Shire Council for many years. The incidence of discoloured water in the Ayr/Brandon water supply has triggered a multi-faceted approach to alleviating the problem. Iron and Manganese levels of all bores in the Shire are monitored regularly. This has resulted in Council taking 5 bores off-line in the South Ayr borefield, establishing an alternative borefield site at Conlan Street, Ayr and commissioning four new bores at this site. Improved water quality from this new borefield has realised major reductions in network iron and manganese levels.

- An air scouring and swabbing program of water mains was carried out throughout the financial year 2015/2016. Burdekin Shire Council has installed swabbing points on the 500mm distribution main coming from South Ayr Reservoir in Burke Street, Ayr. This main was swabbed on 28th June, 2016 and has dramatically reduced incidents of dirty water in Ayr and Brandon.

- All customers are advised by letter drop and media releases prior to scouring commencing and asked to report incidences of dirty water following scouring to Council.

Taste and odour

- Taste and odour complaints increased in the second half of the financial year with 1 complaint for the Ayr/Brandon System between 1 July to 31 December 2015 and 6 complaints for the Ayr/Brandon System being received between 1 January and 30 June 2016. Each complaint is investigated and customers are advised of findings.

- One complaint was received for the Giru/Cungulla System in late June 2016 which resulted in a non-compliance report to the Water Regulator for high chlorine residuals - See Section 5 Notifications. Investigations revealed that the incident was attributable to the hypochlorite delivery contractor incorrectly filling the 100:1 hypochlorite dilution tank with 10:1 hypochlorite.

7. Findings and recommendations of the DWQMP auditor

Burdekin Shire Council DWQMP is scheduled for audit in 2017.

An internal review of the DWQMP was conducted on Friday 6 November 2015. The purpose of the review was to ensure that the DWQMP remains relevant, having regard to the operation of the drinking water service. The review was conducted by:

• Manager - Operations : Mr. Wayne Saldumbide

• Manager – Technical Services : Mr. Kevin Byers

• Manager – Design Office : Mr. Matthew Ingle

• Overseer – Water Waste Water : Mr. Gary Tickner

• Admin Support Officer – Water Waste Water : Ms. Glenda Floriduz

Refer attached minutes of the review meeting for findings.

Hazards and hazardous events that affected the quality of drinking water during the year and which were not addressed in the DWQMP

No pollutant or hazardous events were identified.

Elevated nitrate levels in the Township of Home Hill emergency bores are being monitored.

Potential for vermin contamination at Mount Kelly aerator.

Proximity of Sewage Pump Station No. 5 Ayr overflow to Nelsons Lagoon bores

9

Appendix A – Summary of compliance with water quality criteria

The results from the verification monitoring program have been compared against the levels of the water quality criteria specified by the Regulator in the Water Quality and Reporting Guideline for a Drinking Water Service.

The reported statistics include results derived from repeat samples, and from emergency or investigative samples undertaken in response to an elevated result.

Data listed below in Table 2 covers the period 1st

July 2015 to 30th

June 2016 and has been collated to show the yearly averages for various Parameters under individual Schemes.

All verification monitoring was carried out as per the program stated in the Burdekin Shire Council’s DWQMP.

Table 3 - Verification monitoring results

Scheme name Scheme

component Parameter Units

Frequency of sampling

Total No. samples collected

No. of samples in

which parameter

was detected

No. of samples

exceeding water

quality criteria

Min Max Average (Mean)

Limit of reporting

Laboratory name

Ayr Brandon Reticulation Aluminium (acid-soluble) mg/L Quarterly 16 16 0 <0.003 0.004 <0.003 0.003 QHF &SS

Ayr Brandon Reticulation Arsenic mg/L Quarterly 16 16 0 <0.0001 0.001 <0.0005 0.0001 QHF &SS

Ayr Brandon Reticulation Boron mg/L Quarterly 32 32 0 0.05 0.09 0.069 0.02 QHF &SS

Ayr Brandon Reticulation Cadmium mg/L Quarterly 16 16 0 <0.0001 <0.0001 <0.0001 0.0001 QHF &SS

Ayr Brandon Reticulation Chlorine (total) mg/L Quarterly 3186 3183 0 0 0.97 0.32 0.01 In-house

Ayr Brandon Reticulation Chromium mg/L Quarterly 16 16 0 <0.0001 0.0004 <0.0002 0.0001 QHF &SS

Ayr Brandon Reticulation Copper mg/L Quarterly 16 16 0 0.002 0.019 0.0077 0.001 QHF &SS

Ayr Brandon Reticulation Deet ug/L Quarterly 4 1 0 0.2 0.2 0.2 0.01 QHF & SS

Ayr Brandon Reticulation Fluoride (naturally occurring) mg/L Daily 32 32 0 <0.05 0.14 0.0845 0.1 QHF &SS

Ayr Brandon Reticulation Iron mg/L Quarterly 16 16 0 <0.005 0.03 0.0142 0.005 QHF &SS

Ayr Brandon Reticulation Lead mg/L Quarterly 16 16 0 <0.0001 0.001 <0.0005 0.0001 QHF &SS

Ayr Brandon Reticulation Manganese mg/L Quarterly 16 16 0 0.0005 0.042 0.011 0.0001 QHF &SS

Ayr Brandon Reticulation Nickel mg/L Quarterly 16 16 0 <0.0001 0.0008 <0.0003 0.0001 QHF &SS

Ayr Brandon Reticulation Nitrate mg/L Quarterly 32 32 0 5.4 16 9.82 0.5 QHF &SS

Ayr Brandon Reticulation Non-Detects (Pesticides) ug/L Quarterly 16 0 0 0.01 QHF &SS

Ayr Brandon Reticulation pH pH

Units Daily 622 622 0 6.66 7.72 7.09 0.1 In-house

Ayr Brandon Reticulation pH pH

Units Quarterly 32 32 0 7.04 7.61 7.104 0.1 QHF &SS

Ayr Brandon Reticulation Sulphate mg/L Quarterly 32 32 0 21 27 23.69 1 QHF &SS

Ayr Brandon Reticulation Turbidity NTU Quarterly 32 32 0 <1 1 <1 1 QHF &SS

Ayr Brandon Reticulation Zinc mg/L Quarterly 16 16 0 0.004 0.19 0.059 0.001 QHF &SS

Ayr Brandon Reticulation Ecoli Weekly 250 0 0 Townsville CC

10

Scheme name Scheme




No. of samples in

which parameter

was detected

No. of samples

exceeding water

quality criteria


Limit of reporting

Laboratory name

Giru/Cungulla Reticulation Aluminium (acid-soluble) mg/L Quarterly 4 4 0 0.091 0.33 0.168 0.003 QHF &SS

Giru/Cungulla Reticulation Arsenic mg/L Quarterly 4 4 0 0.0005 0.001 0.0006 0.0001 QHF &SS

Giru/Cungulla Reticulation Atrazine ug/L Quarterly 4 3 0 0.02 1.3 0.463 QHF &SS

Giru/Cungulla Reticulation Boron mg/L Quarterly 4 4 0 0.03 0.05 0.04 0.02 QHF &SS

Giru/Cungulla Reticulation Cadmium mg/L Quarterly 4 4 0 <0.0001 <0.0001 <0.0001 0.0001 QHF &SS

Giru/Cungulla Reticulation Chlorine (total) mg/L Quarterly 1566 1559 0 0 >5.0 >0.387 0.01 In-house

Giru/Cungulla Reticulation Chromium mg/L Quarterly 4 4 0 <0.0001 0.003 <0.0008 0.0001 QHF &SS

Giru/Cungulla Reticulation Copper mg/L Quarterly 4 4 0 <0.001 0.018 <0.006 0.001 QHF &SS

Giru/Cungulla Reticulation Desethyl Atrazine ug/L Quarterly 4 2 0 0.05 0.06 0.055 0.01 QHF &SS

Giru/Cungulla Reticulation Diruon ug/L Quarterly 4 1 0 0.04 0.04 0.04 0.01 QHF &SS

Giru/Cungulla Reticulation Fluoride (naturally occurring) mg/L Daily 4 4 0 0.07 0.16 0.132 0.1 QHF &SS

Giru/Cungulla Reticulation Iron mg/L Quarterly 4 4 0 0.0003 0.018 0.007 0.005 QHF &SS

Giru/Cungulla Reticulation Lead mg/L Quarterly 4 4 0 <0.0001 0.0016 <0.0005 0.0001 QHF &SS

Giru/Cungulla Reticulation Manganese mg/L Quarterly 4 4 0 0.0004 0.001 0.0009 0.0001 QHF &SS

Giru/Cungulla Reticulation Metalachlor ug/L Quarterly 4 1 0 0.07 0.07 0.07 0.01 QHF&SS

Giru/Cungulla Reticulation Nickel mg/L Quarterly 4 4 0 <0.0001 0.0016 <0.0006 0.0001 QHF &SS

Giru/Cungulla Reticulation Nitrate mg/L Quarterly 4 4 0 <0.5 0.6 <0.53 0.5 QHF &SS

Giru/Cungulla Reticulation Non-Detects (Pesticides) ug/L Quarterly 4 0 0 0.01 QHF &SS

Giru/Cungulla Reticulation pH pH


Giru/Cungulla Reticulation pH pH


Giru/Cungulla Reticulation Sulphate mg/L Quarterly 4 4 0 17.2 37 24.55 1 QHF &SS

Giru/Cungulla Reticulation Turbidity NTU Quarterly 4 4 0 <1 <1 <1 1 QHF &SS

Giru/Cungulla Reticulation Zinc mg/L Quarterly 4 4 0 0.005 0.01 0.0097 0.001 QHF &SS

Giru/Cungulla Reticulation Ecoli Weekly 100 0 0 Townsville CC

11

Scheme name Scheme




No. of samples in

which parameter

was detected

No. of samples

exceeding water

quality criteria


Limit of reporting

Laboratory name

Home Hill Water Tower Reticulation Aluminium (acid-soluble) mg/L Quarterly 4 4 0 <0.003 <0.003 <0.003 0.003 QHF &SS

Home Hill Water Tower Reticulation Arsenic mg/L Quarterly 4 4 0 0.0006 0.001 0.0006 0.0001 QHF &SS

Home Hill Water Tower Reticulation Boron mg/L Quarterly 8 8 0 0.04 0.04 0.04 0.02 QHF &SS

Home Hill Water Tower Reticulation Cadmium mg/L Quarterly 4 4 0 <0.0001 <0.0001 <0.0001 0.0001 QHF &SS

Home Hill Water Tower Reticulation Chlorine (total) mg/L Quarterly 1568 1568 0 0.12 0.97 0.542 0.01 In-house

Home Hill Water Tower Reticulation Chromium mg/L Quarterly 4 4 0 <0.0001 <0.0001 <0.0001 0.0001 QHF &SS

Home Hill Water Tower Reticulation Copper mg/L Quarterly 4 4 0 0.003 0.004 0.0037 0.001 QHF &SS

Home Hill Water Tower Reticulation Desethyl Atrazine ug/L Quarterly 4 2 0 0.03 0.04 0.035 0.01 QHF &SS

Home Hill Water Tower Reticulation Fluoride (naturally occurring) mg/L Daily 8 8 0 0.05 0.08 0.065 0.1 QHF &SS

Home Hill Water Tower Reticulation Iron mg/L Quarterly 4 4 0 <0.005 <0.005 <0.005 0.005 QHF &SS

Home Hill Water Tower Reticulation Lead mg/L Quarterly 4 4 0 <0.0001 <0.0001 <0.0001 0.0001 QHF &SS

Home Hill Water Tower Reticulation Manganese mg/L Quarterly 4 4 0 0.0002 0.004 0.0005 0.0001 QHF &SS

Home Hill Water Tower Reticulation Nickel mg/L Quarterly 4 4 0 <0.0001 0.0003 <0.0002 0.0001 QHF &SS

Home Hill Water Tower Reticulation Nitrate mg/L Quarterly 8 8 0 22 26 24.13 0.5 QHF &SS

Home Hill Water Tower Reticulation Non-Detects (Pesticides) ug/L Quarterly 4 0 0 0.01 QHF &SS

Home Hill Water Tower Reticulation pH pH


Home Hill Water Tower Reticulation pH pH


Home Hill Water Tower Reticulation Sulphate mg/L Quarterly 8 8 0 18.4 23 20.43 1 QHF &SS

Home Hill Water Tower Reticulation Turbidity NTU Quarterly 8 8 0 <1 <1 <1 1 QHF &SS

Home Hill Water Tower Reticulation Zinc mg/L Quarterly 4 4 0 0.005 0.01 0.007 0.001 QHF &SS

Home Hill Water Tower Reticulation Ecoli Weekly 82 0 0 Townsville CC

12

Scheme name Scheme



Total No. of

samples collected

No. of samples in

which parameter

was detected

No. of samples

exceeding water

quality criteria


Limit of reporting

Laboratory name

Mt Kelly Bores Reticulation Aluminium (acid-soluble) mg/L Quarterly 4 4 0 <0.003 <0.003 <0.003 0.003 QHF &SS

Mt Kelly Bores Reticulation Arsenic mg/L Quarterly 4 4 0 <0.0001 0.0004 <0.0003 0.0001 QHF &SS

Mt Kelly Bores Reticulation Boron mg/L Quarterly 4 4 0 0.03 0.04 0.0375 0.02 QHF &SS

Mt Kelly Bores Reticulation Cadmium mg/L Quarterly 4 4 0 <0.0001 <0.0001 <0.0004 0.0001 QHF &SS

Mt Kelly Bores Reticulation Chlorine (total) mg/L Quarterly 784 784 0 0.07 >5 >0.715 0.01 In-house

Mt Kelly Bores Reticulation Chromium mg/L Quarterly 4 4 0 <0.0001 <0.0001 <0.0001 0.0001 QHF &SS

Mt Kelly Bores Reticulation Copper mg/L Quarterly 4 4 0 0.002 0.003 0.0027 0.001 QHF &SS

Mt Kelly Bores Reticulation Fluoride (naturally occurring) mg/L Daily 4 4 0 <0.05 0.08 <0.06 0.1 QHF &SS

Mt Kelly Bores Reticulation Iron mg/L Quarterly 4 4 0 <0.005 0.006 <0.0058 0.005 QHF &SS

Mt Kelly Bores Reticulation Lead mg/L Quarterly 4 4 0 <0.0001 0.0003 <0.0002 0.0001 QHF &SS

Mt Kelly Bores Reticulation Manganese mg/L Quarterly 4 4 0 0.0002 0.001 0.0005 0.0001 QHF &SS

Mt Kelly Bores Reticulation Nickel mg/L Quarterly 4 4 0 0.0006 0.001 0.0008 0.0001 QHF &SS

Mt Kelly Bores Reticulation Nitrate mg/L Quarterly 4 4 0 6.5 13 10.375 0.5 QHF &SS

Mt Kelly Bores Reticulation Non-Detects (Pesticides) ug/L Quarterly 4 0 0 0.01 QHF &SS

Mt Kelly Bores Reticulation pH pH


Mt Kelly Bores Reticulation pH pH


Mt Kelly Bores Reticulation Sulphate mg/L Quarterly 4 4 0 17.7 24 21.675 1 QHF &SS

Mt Kelly Bores Reticulation Turbidity NTU Quarterly 4 4 0 <1 <1 <1 1 QHF &SS

Mt Kelly Bores Reticulation Zinc mg/L Quarterly 4 4 0 0.015 0.031 0.027 0.001 QHF &SS

Mt Kelly Bores Reticulation Ecoli Weekly 50 0 0 Townsville CC

13

Table 4 - Reticulation E. coli verification monitoring

17

Appendix B – Implementation of the DWQMP Risk Management Improvement Program

Table 5 – Progress against the risk management improvement program in the approved DWQMP – {Appendix I from BSC DWQMP}

Location Ref Hazardous Event Hazard Residual Risk Uncertainty Risk Improvement Actions Responsibility Target Date Capital or

Operational Estimated Cost

Estimated

Annual

Costs

Whole

system

W1 Lack of skills and

training for staff

Potential water quality issues Low 4 Certain Carry out skills gap analysis for all

staff - Manager Water Waste Water

to carry out gap analysis.

MOP, MWWW Dec-16 Operational $2,500.00

Nil

Develop training program to address

any gaps identified - Hydrological

Pty. Ltd. (Peter Mosse)conducted

employee training March 2016 -

Distribution System Management for

Safe Water

MOP, MWWW Dec-16 Operational $4,000.00

Nil

Implement training program - Two

employees currently enrolled

Certificate II Water Operations and

one employee undertaking Adult

Plumbing Apprenticeship

MOP, MWWW Ongoing Operational $5,000.00

$5,000.00

Whole

system

W3 Natural disaster -

shortage of sodium

hypochlorite due to

road closures and

shortage of supplies

across state

Potential water quality issues Medium 6 Certain Planning underway to increase

storage at all sites to four weeks.

MWWW Works

Completed

Operational $6,000.00

Nil

Source W4 Contaminated aquifers

from agricultural uses

High levels of pesticides Low 4 Reliable Continue monitoring program for

levels of pesticides in raw and

treated water

MWWW Ongoing Operational Current practice Current

practice

W5 Rainfall events

resulting in Protozoa in

bores

Microorganisms - Protozoa

(eg Crypto & Giardia)

Low 4 Certain Investigation into benefit of

modelling Cryptosporidium in higher

risk areas. No modelling required

due to negligible risk. Supply is from

sealed bores at 30m depth.

MTS No

investigation

Operational Current practice Current

practice

W6 Drought Low groundwater levels and

potential saline intrusion

Low 4 Certain Continue monitoring program for

groundwater levels and quality

parameters.


practice

Disinfection W8

W9

W10

Failure of chlorinator,

Low chlorine residuals

Microorganisms - Bacteria

(Presence of coliforms/E-

Coli), Viruses

Medium 6 Confident Analysis of options to install on-line

chlorine residual monitors and the

connection to Council's existing

SCADA system.

DOM, MWWW Dec-16 Capital $10,000 per site Cost neutral

(increased

cost offset

by reduced

wages)

W11 Over chlorination Exceedance of Health and

Aesthetic Parameters

Medium 5 Confident Analysis of options to install on-line

chlorine residual monitors and the

connection to Council's existing

SCADA system.

DOM, MWWW Dec-16 Capital Included Above Cost neutral

W12 Disinfection by-

products (THM's,

Chlorate)

Taste and Odour Low 4 Confident Verification monitoring program

amended to reflect additional

network sampling for THM's and

Chlorate.

DOM, MWWW Ongoing Operational Current practice Current

practice

Distribution W17 Unauthorised use of

hydrants

Microorganisms - Presence

of coliforms/E-Coli

Medium 5 Reliable Investigate reported occurrences and

enforcement of penalties under the

Water Supply (Safety and Reliability)

Act 2008


practice

18

Location Ref Hazardous Event Hazard Residual

Risk Uncertainty Risk Improvement Actions Responsibility Target Date

Capital or

Operational Estimated Cost

Estimated

Annual

Costs

W19

W20

W21

Property

connections/Illegal

connections

Unauthorised modifications

to property connections, no

backflow protection, cross

connection to private

supplies

Low 4 Confident Investigation into reported

occurrences and enforcement of

penalties under the Water Supply

(Safety and Reliability) Act 2008

DOM, MWWW Ongoing Operational Current practice Current

practice

Whole

system

All hazardous events All Hazards N/A N/A Review, amend and develop new

operating procedures to include

specific actions and precautions to

ensure water quality is not

compromised. Task ongoing.

Operating procedures being

reviewed/developed in line with

recommendations of operational

report by Hydrological Pty. Ltd.

MOP, MWWW Ongoing Operational $2,500.00

Current

practice

Whole

system

All hazardous events All Hazards N/A N/A Write a corrective action procedure MOP, MWWW Ongoing Operational Current practice Current

practice

Whole

system

All hazardous events All Hazards N/A N/A Link operational monitoring program

to the existing preventative

measures/critical control points

MOP, MWWW Ongoing Operational Current practice Current

practice

Whole

system

All hazardous events All Hazards N/A N/A Link verification monitoring program

to critical control points and

indicative distribution zones

MOP, MWWW Reviewed and

expanded April

2016.

Operational Current practice Current

practice

Whole

system

All hazardous events All Hazards N/A N/A Develop a system for the collation of

data in a form which will allow

reporting for specific periods of time

and assessment of the results in

accordance with ADWG. Latest

update of SWIMLocal installed

August 2016.

MOP, MWWW,

DOM

Sep-16 Operational $4,000.00 $2,000.00

Whole

system

All hazardous events All Hazards N/A N/A Review existing procedures and

place them on the corporate records

management system. Review in

progress. Procedures formatted for

consistency and inclusion as BSC

Quality Assurance documentation.

MOP, MWWW Jun-17 Operational Current practice Current

practice

Whole

system

All hazardous events All Hazards N/A N/A Implementation of the Technology

One Enterprise Asset Management

System to produce automated

inspection regime. SWIMLocal Task

Manager package adopted for

recording recurring maintenance

activities.

MTS, MWWW Dec-17 Operational Current practice

19


Risk Uncertainty Risk Improvement Actions Responsibility

Target

Date

Capital or

Operational

Estimated

Cost

Estimated

Annual

Costs Source A1 High levels of Iron and

Manganese at South Ayr

Exceedance of Aesthetic

Parameters

Medium 5 Confident Consultants engaged - Options regarding

staged approach to iron and manganese

removal

MOP, MTS Completed Capital $35,000.00 Nil

A2 Stage 1 - implementation MOP, MWWW Completed Capital $65,000.00 $2,000.00

Testing program to establish suitable

location for alternative supply bores. Four

new bores commissioned May 2015.

MOP, MWWW Completed Operational $2,300,000.00 Nil

Monitor effectiveness of Stage 1 for

minimum of 12 months - testing of water at

outlet of reservoir

DOM, MWWW Ongoing Operational Current

practice

Nil

Detail design of Stage 2 if required MOP, MTS Postponed Capital $30,000.00 Nil

Implementation of Stage 2 MOP, MWWW Postponed Capital $400,000.00 $10,000.00

A3

A4

A5

A6

High levels of Iron and

Manganese at sources other

than South Ayr

Exceedance of Aesthetic

Parameters

Low 3 Certain Continue existing monitoring program. If

levels exceed aesthetic limits, risk will be

low and not require immediate action -

increase testing frequency to monthly and

monitor levels. If levels exceed health

guidelines - isolate responsible bores until

levels meet guidelines. Bores 5, 8 and 17 at

South Ayr borefield have been isolated

during the period due to exceedance od

ADWG aesthetic parameters for Iron or

Manganese.

MWWW Ongoing Operational Current

practice

Current

practice

Disinfection A9 Power Failure at secondary

chlorination site

Microorganisms -

Pathogenic Bacteria,

Presence of coliforms/E-

Coli

Low 4 Certain Investigation into provision of permanent

backup power supply. 1.0 kVa inverter

generators to be deployed to chlorination

sites during power failures.

MWWW Completed Operational $2,000 per site Nil

Storage A11 Unauthorised access by non-

Council employees at South

Ayr site.

Contamination of water

stored in reservoir

Medium 6 Confident Investigations required to prevent

unauthorised access to South Ayr facility.

Changes to operational procedures to

ensure existing gates locked to prevent

unauthorised access. Whole of Council

CCTV strategy currently being investigated.

Water Officer currently lives on-site at the

facility.

MWWW Dec-17 Operational $2,500.00 Nil

Distribution A15 Sloughing or resuspension of

biofilm growth in mains

Exceedance of health and

aesthetic quality

parameters

Medium 6 Confident Project to install variable speed drives at

South Ayr WTP to eliminate sloughing.

Completion due October 2016.

Dec-16 Capital Approx.

$600,000

Included

above

Maintain swabbing, flushing and air

scouring. Recurrence intervals reduced to

six monthly from annually for mains

swabbing. Air-scouring program is now

targeted to customer complaint statistics.

MOP, MWWW Ongoing Operational Current

practice

Current

practice

20



Target

Date

Capital or

Operational

Estimated

Cost

Estimated

Annual

Costs Source H1 High Nitrates High levels of nitrates at

Home Hill borefield

Low 4 Confident Continue monitoring program for levels of

nitrates in raw and treated water.


practice

Current

practice

H2

H4

High Nitrates High levels of nitrates at

Emergency Bores 9 & 10

Low 3 Confident Continue monitoring program for levels of

nitrates in raw and treated water. Installing

a by-pass from each of the emergency

bores to enable bores to be exercised

without increased risk to consumers.

Program to run emergency bores for longer

periods to monitor change in Nitrate Levels.

MWWW Ongoing Operational $5,000.00 $2,000.00

H3

H5

High TDS and Conductivity High TDS and Conductivity

at Emergency Bores 9 &

10

Low 4 Reliable Continue monitoring program for TDS and

Conductivity in raw water


practice

Current

practice

Disinfection M1 Power Failure Microorganisms -



Coli

Low 4 Confident Investigate backup power for bore pumps

and disinfection equipment at borefield and

re-lift pumps at break tank site. Local

Disaster Management Group and Ergon

Energy have assigned priority placement of

back up generation at critical water sites.

Council has existing back-up generators at

Nelsons Lagoon, Brandon, Home Hill and

Council Chambers.

DOM, MWWW Completed Capital Nil Nil

Source G1 Lack of Communication Exceedance of Health and


Medium 6 Confident Preparation of new supply contract with

specific requirements for quality

compliance and communication protocols.

MTS, MOP,

MWWW,

Townsville Water

Completed Operational Nil Nil

G2 Use of Emergency Bore Exceedance of Health and


Low 4 Confident Investigate alternative emergency supply.

Development of procedures for use of

existing emergency bore if required.

Investigations for alternate bore supply

sites ongoing.

MWWW Jun-17 Emergency

Bore

abandoned

Nil Nil

G3 Rainfall or any other event

resulting in Protozoa in raw

water

Microorganisms -

Protozoa (eg Crypto &

Giardia)

Medium 5 Confident Townsville Water to model Crypto in raw

water.

Giru/Cungulla WTP filters refurbished June

2016.

Townsville Water Ongoing Operational $10,000 per

site

$1,000.00

Treatment G4 Risks identified in Townsville

Water DWQMP

Various Medium 5 Confident Townsville Water currently carrying out

improvements and will be considered in the

preparation of new agreement

MTS, MOP,

Townsville Water

Ongoing Operational Current

practice

Nil

Disinfection G5 Power Failure at GWTP Microorganisms -


Presence of

coliforms/E.Coli

Medium 5 Confident Investigate provision of backup power

supply at treatment plant site. Or

alternative operational procedures.

Local Disaster Management Group and

Ergon Energy have assigned priority

placement of back up generation at critical

water sites.

MWWW Completed Capital $30,000.00 Nil

G6 High/Low chlorine residuals

in water supplied by

Townsville Water

Consistency of chlorine

residuals from GWTP and

subsequent residuals in

distribution.

Medium 5 Reliable To be dealt with in new contract. Chlorine

analyser installed on BSC delivery main at

Cungulla WTP.

MTS, MOP,

Townsville Water

Jan-16 Operational Nil Nil

21



Target

Date

Capital or

Operational

Estimated

Cost

Estimated

Annual

Costs

G7 Power Failure - Bahr Rd

chlorination

Microorganisms -



Coli

Low 4 Reliable Investigation into provision of permanent

backup power supply.

1.0 kVa inverter generators to be deployed

to chlorination sites during power failures.

MWWW Completed Operational $10,000.00 Nil

Whole

System

Natural Disaster /

Emergency

All Hazards N/A N/A Review and produce documentation of

emergency protocols and procedures

(Review in progress)

MTS, MOP,

Townsville Water

Dec-16 Operational Nil Nil

yearly dwqmp report july 2015 to june 2016 30082016 · this scheme supplies water to approximately...

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