kempsey and lower macleay drinking water supply description€¦ · kempsey and lower macleay...

Jill Busch

Aqualift Project Solutions Pty Ltd

Kempsey and Lower Macleay Drinking Water Supply Description


Version: 3 File: F12/964 Page i

Document Quality Information

Created By: J Busch - Aqualift Project Delivery Pty Ltd

DWSD Leader Manager Water Process

Name of Organisation Kempsey Shire Council

Name of Document: Drinking Water Management System - Kempsey Lower Macleay Water Supply

Document Version: Version 3

File Name: KLM Drinking Water Supply Description

TRIM Number: F12/964

Version Control

Rev Date Description Prepared Reviewed Status

A July 2012 Draft Version J Busch B Green Draft

B 14/08/2012 Draft review J Busch T Graham, R Davies, B Green Draft

C Feb 2013 Draft Version Risk Table review

J Busch T Graham, P Anderson, B Green, WTP & reticulation operational staff.

Draft

0 July 2013 Issued to Client J Busch B Green Draft

1 5/11/ 2013 Final version for Management review

J Busch B Green, M Murphy, R Scott, P Anderson, T Graham

Draft

2 19/01/2014 Final Draft Version J Busch K Lawrence B Green Draft

3 20/8/14 Final Version J Busch B Green Final


Version: 3 File: F12/964 Page i

Table of Contents

ABOUT THIS DOCUMENT ................................................................................................ 1

1. BACKGROUND .......................................................................................... 2

2. SUMMARY OF WATER SYSTEM ................................................................. 3

3. SOURCE WATER ........................................................................................ 5 3.1. The Macleay River Catchment .................................................................................... 5 3.2. The Sherwood Bores ................................................................................................... 8 3.3. Steuart McIntyre Dam ................................................................................................. 9 3.4. Emergency Water Supplies ....................................................................................... 14 3.5. Source water supply details ...................................................................................... 15 3.6. Source Water Stakeholder Groups ............................................................................ 17

4. TREATMENT ........................................................................................... 18 4.1. Supply Capacity ......................................................................................................... 19

5. DISTRIBUTION ........................................................................................ 19 5.1. Steuart McIntyre Distribution Network .................................................................... 20 5.2. Sherwood Lime Plant Distribution Network ............................................................. 21 5.3. Storages ..................................................................................................................... 22 5.4. Issues with Storages .................................................................................................. 24

6. MAJOR CLIENTS AND STAKEHOLDERS ..................................................... 25 6.1. Emergency Contacts .................................................................................................. 26

7. CUSTOMERS ........................................................................................... 27 7.1. Dialysis Patients ......................................................................................................... 27 7.2. Raw water and Rising Main customers ..................................................................... 28 7.3. Water Fill Stations ..................................................................................................... 28

8. WATER QUALITY MONITORING............................................................... 29 8.1. Monitoring Points ...................................................................................................... 29 8.2. NSW Health Compliance Monitoring Points ............................................................. 32 8.3. Issues Identified by Water Quality Monitoring ......................................................... 34 8.4. Issues Identified by Customer Complaints ................................................................ 34

9. RISK ASSESSMENT WORKSHOP ............................................................... 37 9.1. Risk review summary ................................................................................................ 38 9.2. Implementation Plan ................................................................................................. 40 9.3. Critical Control Points ................................................................................................ 41

10. REFERENCES ........................................................................................... 42

MACLEAY RIVER CATCHMENT MAP ......................................................... 43

KEMPSEY LOWER MACLEAY SUPPLY OVERVIEW SCHEMATIC ................... 44

KLM SUPPLY SYSTEM ZONE MAP ............................................................ 45

AERIAL PHOTO OF STEUART MCINTYRE DAM .......................................... 46

PROPOSED OPERATING STRATEGIES FOR MAINTAINING ENVIRONMENTAL FLOWS IN MACLEAY RIVER ..................................................................... 47

STEUART MCINTYRE DAM WATER LEVELS AND ALERTS ........................... 48

SHERWOOD ALTERNATIVE SUPPLY SCHEMATIC ...................................... 49

KEMPSEY SUPPLY AHD STORAGE SCHEMATIC ......................................... 50

SHERWOOD BOREFIELD AERIAL PHOTOGRAPH ....................................... 51

KEMPSEY LOWER MACLEAY WATER SUPPLY CONNECTIONS .................... 52

KLM WATER QUALITY GRAPHS ............................................................... 53


Version: 3 File: F12/964 Page ii

KSC STEUART MCINTYRE DAM ALGAE MONITORING AND RESPONSE PROCEDURE ........................................................................................... 57

NSW DRINKING WATER DATABASE RESULTS ........................................... 59

WORKSHOP ATTENDANCE & MINUTES ................................................... 60

CRITICAL CONTROL POINT PROCEEDURES ............................................... 63

KEMPSEY LOWER MACLEAY RISK ASSESSMENT REGISTRY ....................... 69

KEMPSEY LOWER MACLEAY IMPLEMENTATION PLAN ............................. 83

LIST OF TABLES & FIGURES Table 1: Average Kempsey Daily Temperatures ................................................................... 2

Table 2: Kempsey Lower Macleay Water Supply Overview ................................................. 3

Table 3: Macleay River Catchment Summary ....................................................................... 5

Table 4: Macleay Upper Catchment Rainfall Data ................................................................ 6

Table 5: Macleay Lower Catchment Rainfall Data ................................................................ 6

Table 6: Information sources for environmental data ......................................................... 7

Table 7: Nutrient levels for Steuart McIntyre Dam ............................................................ 13

Table 8 Additional references for Steuart McIntyre Dam .................................................. 13

Table 9: Kempsey Lower Macleay Raw Water Source........................................................ 15

Table 10: Kempsey Lower Macleay Supply - Bore Field Details ......................................... 16

Table 11: Source Water Stakeholder List ............................................................................ 17

Table 12: Kempsey Water Supply Treatment Overview ..................................................... 18

Table 13: KLM Storage Details ............................................................................................ 22

Table 14: Operational details of storages ........................................................................... 23

Table 15: Reservoir Inspection Reports .............................................................................. 24

Table 16: Supply Zones and Major Clients .......................................................................... 25

Table 17: Major Client Emergency Contacts ....................................................................... 26

Table 18: Kempsey Water Supply: Indicative Supply Statistics .......................................... 27

Table 19: Raw water & Rising Main Customers .................................................................. 28

Table 20: Routine Water Quality Monitoring Sites Summary ............................................ 30

Table 21: Kempsey sampling sites for water quality verification ....................................... 31

Table 22: Drinking Water Quality Data ............................................................................... 33

Table 23: Kempsey Customer Water Quality Complaints Jan 2007 to Aug 2012 ............... 35

Table 24: KLM Risk Assessment and Water Supply Review Workshop Participants .......... 37

Table 25: Summary of Initial Risks identified ...................................................................... 38

Table 26: Summary of Residual Risks identified ................................................................. 39

Table 27: Summary Critical Control Points for Kempsey Lower Macleay Supply ............... 41


Version: 3 File: F12/964 Page 1

ABOUT THIS DOCUMENT

The NSW Public Health Act 2010 (the Act) and NSW Public Health Regulation 2012 commenced on 1 September 2012 with Section 25 of the Act and Clause 34 of the Regulations requiring water suppliers to establish and adhere to a Quality Assurance Program for all water supplies in NSW by 1 September 2014. The development of these programs called Drinking Water Management Systems (DWMS), are to be prepared based on the Australian Drinking Water Guidelines (ADWG 2011) as an acceptable industry best practice

The following document has been prepared for Kempsey Shire Council (KSC), to assist with the understanding of the Kempsey and Lower Macleay (KLM) drinking water supply system from a ‘catchment to consumer’ philosophy. The details contained in this document address Elements 2, 3, 4, 5 and 6 of the ‘Framework for the Management of Drinking Water Quality’ (The Framework) from the ADWG (Reference 1). The details included in this document are key characteristics of the catchment, storage, treatment, and distribution facilities, identified water quality monitoring sites and data trends, and key stakeholders who could be impacted by the decisions of the water supplier.

The Kempsey and Lower Macleay Risk Register (see 0) addresses namely Elements 2, 3 and 4, through a hazard identification and risk assessment for all stages of the Kempsey and Lower Macleay supply. The Risk Register outlines the significant risks, documents the current control or preventative measures, identifies the procedures and monitoring protocols in place and identifies improvements.

The Kempsey and Lower Macleay Improvement Plan addresses namely Element 12, bringing together the outstanding actions and areas for improvement that have been identified during the entire KLM Risk review. These actions have been categorised into priority levels with responsibilities and time frames attached, to ensure that the KSC water supplies have fail-safe multiple barriers in place, and that there is a continuous improvement approach to the supply of the best water possible to the customers. This implementation plan will be integrated with all other supply implementation plans, to ultimately have one document for Kempsey Shire Council to manage.

This Supply description document has been developed to support the Kempsey Shire Council Drinking Water Management System, which outlines the council’s commitment and activities that address all of the twelve Elements of the Framework, for all of Councils Water supplies.



1. BACKGROUND

Kempsey Shire is located 430 km north of Sydney along the Mid North Coast of NSW. Although the local government area (LGA) lies across two river valleys, the Shire’s major urban areas (excluding Crescent Head which is located within the Maria River catchment) are situated within the Macleay River valley catchment and river basin.

Local government came to the Macleay Valley in 1885 with the constitution of the Kempsey Borough Council. The remainder of the valley was introduced to municipal administration in 1907 with the formation of the Macleay Shire Council. In 1975 the Kempsey Municipal Council and the Macleay Shire Council agreed to amalgamate their areas, which meant that the Macleay River County Council would also be abolished, and its activities would be transferred to the newly formed Council. As result, the Kempsey Shire Council was incorporated from 1 October 1975.

Macleay Water was a business unit of Kempsey Shire Council between 2005 and 2010, functioning as a separate business unit to Council but still performing the service delivery requirements of Council. Macleay Water has been absorbed back into council as the Water Services section.

Typically the climate zone is subtropical (no dry season) with an average annual rainfall of 1200mm (130 years of data) at Kempsey. The major falls of rain occur between December and April. The National dry land salinity risk mapping indicates land in the region has no current or forecasted risk of dry land salinity

Table 1: Average Kempsey Daily Temperatures

Min daily temperature 12°C

Max daily temperature 25°C

Mean daily temperature 21°C

No active mining operations exist today however historical mining activities in the upper Macleay Valley have occurred intermittently from the late 1860’s to the 1970’s.

A 13 year extended dry period from 1900 to 1912 instigated the installation of a steel reservoir in Lord Street Kempsey, and the installation of pumps and pipework adjacent to the river to fill the reservoir. This was the start of the present day Kempsey and Lower Macleay (KLM) Water Supply.

Today, ground water is pumped from Macleay River Alluvium borefield and supplied to Steuart McIntyre Dam or directly to the KLM water system. After treatment the water serves the towns of Kempsey, Frederickton, Smithtown, Gladstone, and associated rural areas and townships.



2. SUMMARY OF WATER SYSTEM

The Kempsey and Lower Macleay drinking water supply system provides drinking water to the towns of Kempsey, Frederickton, Smithtown, Gladstone and the associated rural areas and townships. Table 2 below provides an overview of the KLM water supply system. A detailed schematic of the system has been included in APPENDIX B, and the specific details of the supply system are outlined further in this document.

Table 2: Kempsey Lower Macleay Water Supply Overview

Component Details

Population served

(2011 estimate)

Overall - 18319

Lower Macleay – 5390 (Yarravel, Euroka, Bellimbopinni, Dondingalong)

Kempsey – 5199 (South and Central )

West Kempsey – 4491

Frederickton – 1123

Gladstone – 561

Smithtown – 561

Aldavilla – 281

Kinchela – 281

Greenhill Community- 248

Clybucca – 112

Burnt Bridge Community – 72

Source: North Coast Public Health Unit Supply System Report for the Kempsey Lower Macleay 2012

Water Source Macleay River Catchment upstream of the Sherwood Bridge supplies the Macleay River Alluvium.

The Sherwood borefield (8 production bores), draws water from the alluvium supplemented via a recharge channel adjacent to the river.

Maximum capacity of 20ML/d with a current average annual extraction of approximately 3000ML, and a possible Annual Licence allocation of 9900ML.

There is an emergency infiltration well at Belgrave Falls with a maximum capacity of 5.8 ML/d. This well can supply water to the Steuart MacIntyre Dam or the Potters Hill Reservoir supply area however it is in a disused and non-operational state.

Kinchela Emergency Bore Field is located on McKays Road, Kinchela. The Bore field consists of 4 production bores within the Hat Head National Park and treated at Kinchela WTP. This system is rarely used due to issues with pressurised system and broken mains.

Source: Path M:/Water/Education/Kempsey WS Combined Info

Raw Water Storage The Steuart McIntyre Dam (SMD) is a 2500 ML off-stream storage dam with an associated pump-station and treatment plant. Commissioned in October 2000.



Component Details

Water Treatment Steuart McIntyre Dam WTP (Capacity 38.1ML/d)

Sodium Hypochlorite (12%) - flow paced

Sodium Carbonate –currently not in use

Sherwood Lime Plant (located at the intersection of Sherwood Rd and Link Rd Yarravel)- Capacity 7ML/d when last operated

Lime (Hydrated Lime)

Chlorine (Gas) flow paced

Bellimbopinni Chlorination Site (located Pacific Highway south of Dongars Lane Bellimbopinni).

Chlorine (Gas) - flow paced

Bloomfield St Pump Station and Chlorination (Located at Bloomfield St South Kempsey)

Chlorine (Gas)

Emergency Supplies (non-operational states):

Belgrave Falls drift well and treatment (located Oakland Rd Dondingalong) with

Chlorine Gas


Kinchela Water Treatment Plant (Capacity2.2 ML/d) located on McKays Rd Kinchela.

Aeration


Sodium Hypochlorite

Distribution:

6 Reservoirs

1 Lift Pumps

3 Booster Pumps

8 supply area

NB - When from Steuart McIntyre Dam supply.

See Section 6.2 for alternative supply via Sherwood Lime Plant.

Greenhill Reservoir (9.1ML) located Queen St Greenhill supplies:

Via gravity feed the Kempsey township north of the river, Lower Macleay, Smithtown, Gladstone, Kinchela, Jerseyville and Frederickton (higher) areas.

Everinghams Lane Booster Pump Station (variable speed flow located on Collombatti Rd) supplying Everinghams Lane and adjoining subdivisions.

Frederickton Reservoir (1.15ML) gravity feeds areas in the eastern or lower areas of Frederickton and some properties on the Great North Rd.

Clybucca Reservoir (1.1ML) service areas.

Potters Hill Reservoir Booster Pump Stations located beside Belgrave Falls WTP, boosts the flow to Potters Hill Reservoir (13.65ML) located on Gowings Hill Rd South Kempsey and:

Supplies Kempsey township south of the river, Lower Macleay south of the river, and Burnt Bridge Booster service area.

Supplies Bloomfield St Lift Pumps located at the eastern end of Bloomfield St South Kempsey to supply Billy Goat Hill Reservoir (2.15ML) located on the Crescent Head Road or Bloomfield Street Booster service area.

John Lane Reservoir (3.5ML) located John Lane Rd Yarravel

Gravity feeds Aldavilla area.



3. SOURCE WATER

3.1. The Macleay River Catchment

The total Macleay River catchment consists of 14 sub catchments and covers an area of 11450 km2, which encompass a wide variety of issues.

The headwaters of the Macleay River rise as the Guyra River on the eastern side of the Northern Tablelands near Armidale and Walcha. From here the Chandler River, Styx and Apsley Rivers are important tributaries of the Macleay River. These and the other tributaries including the Tia River, Dyke River and Yarrowitch River pass through a number of spectacular gorges and waterfalls in the Oxley Wild Rivers National Park. The main arm of the Macleay River extends 150km, and releases into the Pacific Ocean at South West Rocks where the Macleay Estuary is a significant ecosystem for a range of aquatic and terrestrial flora and fauna.

Impacts to the River and surrounding catchment include land clearing through farming and urban development, acid sulphate soil leachate, slumping and erosion, bank erosion, decreasing water quality and subsequent habitat loss for a range of significant and local fauna.

Source: The Macleay Landcare Network (MLN) Inc. web site http://www.macleaylandcare.org.au/river.html

A map of the Macleay River Catchment area has been included in APPENDIX A and the details of the catchment are summarised in Table 3 below.

Table 3: Macleay River Catchment Summary

Macleay River Catchment

Total catchment area 11450 km2

Catchment area above Sherwood 10240 km2

Main channel length 150 km

Population 53000

Main towns Armidale, Kempsey, Walcha, Guyra, Bellbrook

Major river and tributaries Macleay, Chandler, Styx, Apsley, Tia, Dyke, Yarrowitch Wollomombi & Georges

Creek/Rivers

Source: http://www.macleaylandcare.org.au/river.html

A significant part (40%) of the catchment is mountainous with the remainder of the area forming a narrow coastal flood plain. The river is tidal to Belgrave Falls which is approximately 54km from the ocean.

Kempsey Shire is situated on a floodplain and hence flooding, caused by rain events in the upper catchment of the Macleay River, occurs periodically. Typical rainfall for the upper and lower catchment has been summarised into Table 4and Table 5, and Figure 1 below. The main river flow and height monitoring station for the KLM water supply is determined from a gauging station at Turners Flat (Station No 206011) which is owned and managed by the NSW Government.

http://www.macleaylandcare.org.au/river.html

http://www.macleaylandcare.org.au/river.html



Table 4: Macleay Upper Catchment Rainfall Data

Monitoring Station Mean rainfall (mm) Years of data

Walcha Post Office 808.6 117

Armidale Radio Station 791.2 135

Guyra Post Office 880 118

Average rainfall above Sherwood 826.6

Source: Bureau of Met Climate statistics for Australian sites http://www.bom.gov.au/climate/averages/tables/ca_nsw_names.shtml

Table 5: Macleay Lower Catchment Rainfall Data

Figure 1: Kempsey typical rainfall graph

0

20

40

60

80

100

120

140

160

180

200

Rai

nfa

ll m

m

Rainfall Kempsey Weather Station 59017

Monitoring Station Mean rainfall (mm) Years of data

Kempsey Wide St 1218.8 130

South West Rocks Lighthouse 1488.4 73

Average rainfall in lower catchment 1353.6

Source: Bureau of Met Climate statistics for Australian sites http://www.bom.gov.au/climate/averages/tables/ca_nsw_names.shtml



Further information on rainfall, river levels and flow can be obtained from the web sites listed in Table 6 below:

Table 6: Information sources for environmental data

Information Web site

Environmental conditions including River Condition Index. Risks to in stream values /Catchment Health indicators / Ecological values etc.

http://www.water.nsw.gov.au/Water-management/Monitoring/Catchments/default.aspx#index

Map of catchments with monitoring station data. http://waterinfo.nsw.gov.au/water.shtml?ppbm=SURFACE_WATER&rs&3&rskm_url

Real time rainfall and river level data from throughout the Macleay River catchment.

mhl.nsw.gov.au/www/kempindex.htmlx

Bureau of Meteorological (BOM) site for Rainfall and river heights. http://www.bom.gov.au/hydro/flood/nsw/midnorth.shtml

NSW Government Office Of Water Department of Primary Industries http://www.water.nsw.gov.au/Water-management/Basins-and-catchments/Macleay-catchment/Macleay-catchment -

Northern Rivers Catchment Management Authority http://www.northern.cma.nsw.gov.au/what-we-do

3.1.1. Catchment Issues

Flooding of the river causes issues of restricted access to supply systems including the requirement to isolate the bore supply. Other problems associated with the general flooding of the area include mains breaks from movement around in ground infrastructure, and restricted access to Frederickton and Billy Goat reservoirs.

Known issues and water quality concerns from the catchment include agricultural impact from cattle grazing and dairy farms. There are approximately 5 known dairies upstream of the Sherwood Borefield. The towns of Armidale and Walcha also have sewage treatment plants that discharge into the Macleay catchment area. During flooding events, elevated turbidity levels (>200NTU) have been recorded at the Bellbrook and Sherwood monitoring sites.

The soils in the upper catchment are naturally high in metals, including antimony and arsenic due to the geo-chemistry of the underlying rocks, and while there is no active mine within the catchment today, there are however hundreds of disused mines. In 2012, there were a number of incidents of overflows of the storm water retention ponds from the Hillgrove Mine site due to high rainfall. Additional raw water monitoring at Bellbrook during these periods did not indicate any higher than normal levels of Arsenic or Antimony. Research undertaken by the University New England (UNE) indicates that since the 1860s, historic mining practices deposited between two (2) and seven (7) million tonnes of waste rock into the upper Macleay River catchment with reported levels above guideline limits for some metals, including arsenic.

Metals are being mobilised from the soils and waste rock by physical, chemical and biological processes and are moving down the rivers and streams, primarily in the river sediment. A report by the UNE in 2000 (Reference 2) identified that metal in the water and soils is almost all a legacy of historical mining activities in the upper Macleay Valley, which occurred intermittently from the late 1860’s to the 1970’s.



http://waterinfo.nsw.gov.au/water.shtml?ppbm=SURFACE_WATER&rs&3&rskm_url

http://waterinfo.nsw.gov.au/water.shtml?ppbm=SURFACE_WATER&rs&3&rskm_url

http://www.bom.gov.au/hydro/flood/nsw/midnorth.shtml

http://www.northern.cma.nsw.gov.au/what-we-do



Agencies have agreed to form the Kempsey Macleay Water Quality Management Group to monitor and evaluate data, collaborate on research, provide advice to the community and coordinate necessary responses. Drinking water quality is being monitored by ongoing chemical analysis, particularly at urban water supply intakes (Bellbrook, Willawarrin and Kempsey).

Source: Macleay River Water Quality Group – Communications Plan Jan 2012

3.2. The Sherwood Bores

The Sherwood borefield is located in the upper reaches of the Macleay River Alluvium which stretches along either side of the Macleay River to the coast. The borefield is on a high level terrace of the alluvial flats of the river, approximately 11 km west of the town of Kempsey. There are eight production bores in the borefield with an additional well near Belgrave Falls. See section 3.5 for further details on the bores including a diagram of the Sherwood bore field.

The aquifer at Sherwood borefield has a thickness of approximately 8m overlain by about 8-12m of silt and sandy clays.

Direct inflow of the Sherwood borefield aquifer from the Macleay River is slow compared to more rapid filling from rainfall. To supplement the recharge of the aquifer, an artificial recharge system, which has a good hydraulic connection to the aquifer, was constructed in 1987. The recharge channel is filled through an inlet pipe when the river flow is high enough and during lower river flows, the water can also be pumped into the recharge channel. This system allows recharge to continue when the river flow drops to below 50 ML/d and utilisation of the artificial recharge has increased the capacity of the borefield to 38 ML/d. (Reference 3).

Sherwood Borefield has a maximum pumping capacity of 20ML/d or (233L/sec) and a licenced extraction rate of 9.9 GL/year. Hydraulic modelling of the borefield has indicated that the river-aquifer interaction is an important mechanism for recharging the aquifer and that discharge flow from the aquifer to the river is also substantial. The modelling has also indicated that the recharge channel provides an important source of water for the borefield. The modelling indicated that under a low rainfall and low river flow regime, an upper limit of 15 ML/d extraction would need to be considered. In severe drought conditions, over a sustained period and with no artificial recharge, an upper extraction limit of 9ML/d should be considered. Additional monitoring and modelling would be required for a more precise estimate. See Reference 4 the Groundwater assessment Sherwood borefield, model development for further information.

Draft operating strategies for maintaining environmental flows in the Macleay River have been developed, however have not been formalised. The pumping capacity may be controlled by river flows recorded at the upstream Turners Flat gauging station on the Macleay River. See APPENDIX E for the ‘Proposed operating strategies for maintaining environmental flows in Macleay River’.

Since the construction of the Steuart McIntyre Dam (SMD), artificial pumping to the recharge channel has not been required as the dam has provided a significant storage volume to allow reduced instantaneous pumping flows from the bores during periods of lower river flow.



3.2.1. Sherwood Bore Issues

Flooding causes issues such as damage to the recharge channel site by the depositing of silt and flood debris. At the time of a flood there is limited access to the bore sites, and it is necessary to isolate the bores to preserve infrastructure and water quality at the Steuart McIntyre Dam

Water salinity from the bores in the alluvium is generally low, but pH and iron content have known to be a problem.

In the Belgrave Falls area, which is immediately upstream of the estuarine plains area, and close to the tidal limit, there is a risk of increasing salinity if the bores are over pumped. This is especially the case during times of low flow, because of the proximity of saline groundwater downstream of the tidal limit.

In many cases, water stress is evident either through the capping of bore water extractions or through exceedance of system capabilities in peak periods.

The Macleay River Alluvium, which stretches from the Sherwood Borefield to the coastline, has also been identified as being of high risk of over-extraction. Land use threats to the town water supply forms the biggest extractive use from the surface water source and environmental flows, and water sharing rules are yet to be defined (Reference 3).

The Draft Sherwood Borefield Environmental Rehabilitation Plan (Reference 5) was developed to guide proposed environmental rehabilitation works over the Sherwood site. Recommendations include creating an Operational Management Plan; seek funding for and implementing projects for rehabilitation works, and erosion control. In Nov 2012 the project began with an agreement signed between KSC and Northern Rivers Catchment Management Authority to begin works on the rehabilitation work and revegetation in the recharge channel and river reach area, at Sherwood bore field.

3.3. Steuart McIntyre Dam

In the mid 1980’s KSC identified that it needed to upgrade its water supply as at that stage, it was totally reliant on the Macleay River and therefore at considerable risk during severe drought conditions when the river may stop flowing.

Analysis of the water requirements for the Kempsey District using the existing sources showed that some form of off-stream storage dam was required. Seven alternative sites were identified as being suitable. Of these four were eliminated due to excessive cost. Of the remaining three sites the Fattorini Creek site was considered the most economic. This was mainly due to its location being close to both Kempsey and the Sherwood Borefield.

The Steuart McIntyre Dam (SMD) was approved for construction by the Kempsey Council in 1994 when the need for the dam was highlighted when a drought caused the Macleay River to stop flowing for 5 weeks, resulting in severe water restrictions being imposed on the KSC residents.

Construction commenced April 1999 and was completed October 2000.

The site of the dam has a total of approximately 90 hectares with 27 hectares covered by water. The remaining hectares are retained as natural bush land as a buffer around the water



body where general public and stock are restricted from area to preserve water quality and public safety.

The maximum capacity of the SMD is 2,500 ML and an aerial photograph of the Dam is included in APPENDIX D. The use of the SMD has met the states requirements to reduce environmental stresses on the Macleay River during low flow periods and help ensure an environmental passing flow.

3.3.1. Operational Details

The Sherwood production bores are usually operated two at a time on a rotational basis (for maintenance reasons) to supply water to the SMD via the Inlet race, with the aim of maintaining the dam capacity at 96% full. The bore pumps will begin pumping automatically when a 2% decrease is recorded. Since 2011, the dam level has been operated at 90% due to mechanical issues at the bores, and the occurrence of algae and taste and odour (T&O) issues with the dam.

The dam has an aeration system to assist with the control and management of algae and stratification. Compressed air is passed through a 75m length of poly tubing with air dispersal holes spaced equally and suspended 1.8m off the dam floor. The air compressor is usually run for 6 hours per night and is based on maintaining consistent Dissolved Oxygen (DO), pH, and temperature levels across the 5 online monitoring sites at the offtake tower. The dam outlet tower has 7 portholes and coupled with the current operational practices of the aeration line and dam level, portholes 2 to 5 have basically the same water quality, with Pothole 5 the usual operating offtake for the water supply. A diagram of the Steuart McIntyre Dam water levels has been provided in APPENDIX F.

Online monitoring for DO and temperature are from a floating system which is set for monitoring at surface, 4, 8, 12m, and dam floor levels. Online pH is also monitored at surface and 8 m levels, which is approximately at the supply offtake in use.

From the outlet tower of the dam, water is supplied to the delivery pumps located within the SMD WTP pump room.

If any algae or taste and odour (T&O) compound levels are detected at alert levels at the dam or from the offtakes (see section 3.3.2), then the alternative supply from the Sherwood Lime plant is operated.

3.3.2. SM Dam Issues

The dam was plagued with algae problems following its construction. The issues associated with algae growth is that they can produce chemicals that cause the water to develop musty T&O problems that make it unpalatable. These T&O problems usually occur in the warmer temperature months. Some species of blue -green algae can produce toxic chemicals making the water dangerous for consumption; however none of these species have been identified in the dam at the time of preparing this document.

Following construction, the algae problems were associated with microscopic blue-green algae, however there have also been episodes of a large thread-like algae species that although not causing taste, odour or health issues, have caused blockages in customer water meters.



Ongoing investigations continue into the discovery of benthic algae that is known to be a T&O producer, and has been identified at the same time when T&O issues at the dam have occurred.

The detailed alert level framework for the management of cyanobacteria in the Steuart McIntyre Dam has been included in APPENDIX L. These alert levels are based on industry best practice and have recently changed to include the biovolume measurement for algae rather than just the traditional cells counts (cells/ml of identified species). Biovolume measures the total volume of algae biomass in a given amount of water and is typically measured in mm3/L. Algae numbers, nutrient load and taste and odour compounds are monitored on a regular basis, as part of the management of the SM Dam

KSC also have an EPA licence, 11825, which allows for alum dosing on the SMD in response to algae control. The licence has been maintained however this incident response has not been required for at least a decade.

Source: Steuart McIntyre Dam EPA Licence 11825, File 257278, Anniversary Date 7 Feb.

Figure 2 and Figure 3 below display a 14-month graphical representation of seasonal growth rates of algae as cell counts and biovolume in the SM Dam. Figure 4 below provides an historical assessment of algae growth in the SM Dam for the years of 2002 to 2013.

Figure 2: Total Biovolume mm3/L Steuart McIntyre Dam (14 months)



Figure 3: Total Cyanobacteria Cells/mL Steuart McIntyre Dam (14 months)

Figure 4: Total Cyanobacteria Cells/mL Steuart McIntyre Dam Historical Trend 2002 – 2013



Nutrient levels are monitored on the SMD to manage the potential for the promotion of algae growth. Table 7 below shows the monitored nutrient levels monitored within the SMD for the period July 2008 to Jan 2012.

Table 7: Nutrient levels for Steuart McIntyre Dam

No of samples =108 AMMONIA

(mg/L)

NITRATE

(mg/L)

NITRITE

(mg/L)

TOTAL NITROGEN

(mg/L)

TOTAL PHOSPHORUS

(mg/L)

Min 0.02 0.02 0.001 0.2 0.008

Max 0.14 0.89 0.01 1.1 0.06

Average 0.05 0.22 0.00 0.45 0.02

Composite samples taken from surface, 4, 8, 12 & 20m offtakes from July 2008 to Jan 2012

Additional information for the SMD can be obtained from the sources listed in Table 8 below.

Table 8 Additional references for Steuart McIntyre Dam

Information Reference or Link to information sources

Steuart McIntyre Dam, Dam Safety Emergency Plan covering flooding earthquake and other emergency situations

h:\water\steuartmcintyredam!!\steuat mcintyre dam safety plan\steuart mcintyre dam emergency plan.doc

Management Strategies for Cyanobacteria (Blue-Green Algae): A Guide for Water Utilities By Gayle Newcombe, Jenny House, Lionel Ho, Peter Baker and Michael Burch

Research Report No 74 Water Quality Research Australia Limited (WQRA)

Steuart McIntyre Dam Management Strategy

Hunter Water September 2003

This management strategy has been prepared to provide KSC with a response plan that can be used to coordinate activities in the event of a toxic bloom or taste and odour event in the dam. The Plan includes monitoring of source water and dam water, options for source substitution and guidelines for destratification system operation and Offtake level selection.

F:\UTILITIES\Water Services\WATER\SteuartMcIntyreDam!!\Steuart Mcintyre Dam Management Strategy\SMD Management Strategy Report



3.4. Emergency Water Supplies

There are two supplies that can boost the supply to the Kempsey water supply areas.

3.4.1. Belgrave Falls

There is an emergency infiltration well at Belgrave Falls (location Oakland Rd, Dondingalong). This drift well is filled through the shingle bed from the Macleay River which has a maximum capacity of 5.8 ML/d but it is currently in a disused and non-operational state. When in operation, this supply can provide source water to the Steuart McIntyre Dam or to Potters Hill Reservoir supply area only.

Action Item: KLM S 3.4.1

KSC to address the long term need for the Belgrave Falls facility and to remove redundant infrastructure if deemed non-operational.

3.4.2. Kinchela

Kinchela Emergency Bore Field is located on Hat Head Road, Hat Head. This borefield is established within the Macleay Coastal Sands Aquifer, which also provides water to the coastal townships of the Kempsey Shire, through three other borefield sites (Hat Head, South West Rocks and Maguire’s Crossing). The borefield consists of four production bores which are currently only licensed as test bores. Formal licensing for the extraction is currently being negotiated with NSW Office of Water. This system is rarely used as the pumping pressure from the WTP is too great and has caused mains to break when operated.

The aquifer contains both a shallow and deeper aquifer. The aquifer is recharged entirely by rainfall, and movement of the resultant groundwater is mainly towards the ocean. Ground water is also discharged into the local wetlands, estuarine rivers and is lost by evapotranspiration from the dunal vegetation. The Kinchela bores are all located in the deep aquifer. The deeper aquifer requires the larger and less frequent rainfall event of >100mm /month to recharge the system. The key water quality issues for the deeper ground water are lower pH and elevated iron and aluminium.

Monitoring of the Kinchela bores has identified that they have higher salinities and also ionic ratios similar to seawater. This can indicate a higher risk of saltwater ingress due to over pumping of the deep aquifer. Modelling has indicated that pumping at 100% of allocation is likely to result in severe water declines resulting in dewatering of the upper layers of the aquifer and hence adversely impacting on the groundwater dependant terrestrial vegetation. See Reference 7 for further details about a summary of the geology and hydrogeology of the Macleay Coastal Sands Aquifer including analysis of the water level and salinity monitoring data and analysis of water quality and hydrochemistry that was undertaken for selected shallow and deep monitoring bores. The bores supply to two aeration towers (for the removal of iron and manganese) and the water is dosed with lime before passing through a baffled collection tank to allow the settling of iron. Sodium hypochlorite is dosed into the supply as the Kinchela transfer pumps deliver the water to the reticulation.



Action: KLM S 3.4.2

Management to determine the viability of maintaining Kinchela as an emergency supply as the site has operational issues and cannot become operational in the short term without capital investment.

3.5. Source water supply details

Table 9 and Table 10 below provide the details for bulk water entitlements and licences for the KLM source water supplies. An aerial photograph, labelled with the Bores in the Sherwood borefield has been included in APPENDIX I.

Table 9: Kempsey Lower Macleay Raw Water Source

Source Type Max allocation or capacity

(ML/d)

Bulk water entitlement

(ML/y)

Sherwood Bores Aquifer 20 9900

Steuart McIntyre Dam

Reservoir John Lane Pumps (116L/s)

Greenhill Pumps (225L/s)

Potters Hill Pumps (approximately 40-50L/s

Belgrave Infiltration Well Drought Bore

River Infiltration

5.8 200

Kinchela Emergency Bore Field

Observation licence only

Note: The Max Capacity in ML/day is the maximum amount of water available from that source with existing infrastructure in place



Table 10: Kempsey Lower Macleay Supply - Bore Field Details

Location Property No.

Licence No. Bore No.

Depth

(m)##

Expiry Date

Licence Limit (ML/Y)

Comments

Sherwood

30PT920498

30BL108965 Bore 1 21.40 24.02.18 9900

30BL108964 Bore 2 20.04 24.02.18

30BL108959 Bore 3 21.03 15.01.20

30BL143195 Bore 4 21.00 10.09.16

30BL108967 Bore 5 20.04 15.01.20

30BL108963 Bore 6 20.73 15.01.20

30BL125320 Bore 11 20.36 07.06.18

30BL125319 Bore 12 20.52 07.06.18

Bore 6A

Observation Bore- This bore has aquifer monitoring capability but the SCADA connections are inoperable.

30PT920316 30BL030246 Smyth's Bore

05.10.12 66 Not in use however maintained by KSC.

Belgrave Falls Pump Station

30PT920530 30BL176735 NA 16.04.16 200 Not in operational use.

Emergency drought bore on north bank of river is licenced, however drift well associated with old town water supply, on south bank is not licenced

Kinchela WTP Bores

30PT920377 30BL1830362 Bore 1 Current licence for test bores only – Operational licence still to be formalised.

30BL180363 Bore 2

30BL180364 Bore 3

30BL180365 Bore 4

Source: H:Water /Water Licence Details/DNR Water Licence and Bore Details.xls

## as measured in Sept 2003



3.6. Source Water Stakeholder Groups

The KSC has a number of working parties and activities that interact with stakeholders in the Macleay River catchment. These activities are listed in the following Table 11.

Table 11: Source Water Stakeholder List

Group or Project

Agencies Involved

Area of Interest

Reference or

Link to information sources

Kempsey Macleay Water Quality Management Group

KSC, CMA, University New England, DPI, EPA, NOW, NSW Health.

Mining activities & Water Quality issues within the Upper and Lower Macleay River.

Protecting and Enhancing the Macleay River Riparian Zone – KSC Sherwood Borefields

Northern Rivers CMA & KSC

River reach and recharge channel vegetation restoration for erosion control and includes some landholder engagement.

Catchment Officer

(02) 65614966

http://www.northern.cma.nsw.gov.au/get-involved/northern-rivers-cap

Macleay Landcare Network (MLN)

Committee comprising of 7 members who have a mix of natural resource management and business skills

Macleay Landcare Network is a state, federal and community-funded organisation responsible for engaging the local community in key natural resource management issues that face the catchment

Phone 6562 2076 Email: [email protected] or [email protected] Post: PO Box 3048, West Kempsey NSW 2440 Office: 1/80 Belgrave St, Kempsey

N/A Office of Environment & Heritage EPA

Notification to KSC of pollution event in the Macleay River

John Schmidt

(02) 65614975

Simon Smith (02) 6773 7003

N/A Office of Water

Monitoring of licencing for extraction Glenn George

(02) 67729558

N/A Dam Safety Committee (government department)

5 Year review and inspections on SMD safety and agreement on SMD Emergency management Plan

www.damsafety.nsw.gov.au Steve Knight (emergencies)

02 9842 8070

0403 681 645




mailto:[email protected]





4. TREATMENT The KLM supply is normally fed from the Sherwood bore field to Steuart McIntyre Dam supplying six reservoirs, 3 booster pump stations, one lift pump and servicing eight distribution areas.

The main treatment takes place at the Steuart McIntyre Dam with disinfection only. Facilities also exist for Sodium Carbonate (Soda Ash) treatment for raising the pH level, but this dosing system has never been used as the pH of the dam water has an adequate range.

An alternative supply can bypass the Steuart McIntyre Dam, where the system is directly supplied from the bore field to the Sherwood Lime Plant then onto the distribution. This alternative treatment system has pH adjustment and disinfection treatment and is used if the Steuart McIntyre Dam water is offline due to taste & odour or algal issues.

Secondary chlorination sites exist in Bellimbopinni and at South Kempsey Bloomfield Pump station, as boosters to the disinfection levels in the longer distribution systems.

Table 12: Kempsey Water Supply Treatment Overview

Location Step Type

Steuart McIntyre Dam WTP

(off Link Rd Yarravel)

pH correction- not in use Soda Ash (Sodium Carbonate)

Primary disinfection Sodium Hypochlorite (12%)

Sherwood Lime Plant

(located at the intersection of Sherwood Rd and Link Rd Yarravel)

pH correction Lime (Hydrated Lime)

Primary disinfection Chlorine (gas)

Bellimbopinni Chlorination

(located south of Dongars Lane Pacific Hwy Bellimbopinni)

Secondary disinfection Chlorine (gas)

Bloomfield Pump station Chlorination

(located at eastern end Bloomfield St South Kempsey)

Secondary disinfection Chlorine (gas)

Emergency Use Only

Kinchella Bores WTP

Located on McKays Rd, Kinchela

Primary disinfection Sodium Hypochlorite (12%)

pH correction Lime (Hydrated Lime)

Belgrave Falls, Oakland Road Primary disinfection Chlorine (gas)



4.1. Supply Capacity

The Steuart McIntyre Dam WTP has a drawing capacity of 441L/s.

John Lane Pumps (116L/s)

Greenhill Pumps (225L/s)

Potters Hill Pumps (approximately 40-50L/s when not boosted and 100 L/s when boosted with Potters Hill Booster pump station)

The Sherwood Lime Plant has a production capacity of approximately 7 ML/Day (based on production figures when last in operation) and is only run during ‘Off Peak’ power periods (non-operational during 7-9.00am and 6-8.00pm hours). This occurs during high demand water supply periods and customers may notice a slight pressure decrease during this time due to decreasing storage levels in Greenhill reservoir. To meet the demand, every available bore (up to 8) can be operated when on this system. The supply is maintained and balanced based on the Greenhill reservoir level.

5. DISTRIBUTION

The Kempsey Lower Macleay water supply is a complex system that has 6 service reservoirs with one Lift Pump station and 3 Booster Pump stations. Greenhill reservoir is a critical supply reservoir as it supplies Frederickton and Clybucca reservoirs and 57% of the total customer connections.

A schematic of the supply system is available in APPENDIX B and provides an overall look at the system. A larger (A1) schematic of the supply is well can be accessed from KSC electronic documents at the following file path

M:\WATER\Water Plans\WatersSchematics\Kempsey_Lower Macleay A1 Schematics.xlsx.

A map of the Kempsey and Lower Macleay Drinking water supply system has been included in APPENDIX C, which has been colour coded to show the 3 different supply zones.



5.1. Steuart McIntyre Distribution Network

Water from the Steuart McIntyre Dam is treated and then pumped to 3 locations:

1. John Lane Pumps (116L/s) supplies the John Lane Reservoir (3.5ML) via 1.7km DICL dedicated main. 1.1. Water gravitates out of the reservoir to supply Yarravel, Aldavilla and surrounding

areas, servicing approximately 665 rural and residential customers.

2. Greenhill Pumps (225L/s) supplies Greenhill Reservoir (9.1ML) via 4.6km of a 500mm CICL dedicated main, and then gravity feeds the following sites; 2.1. The Kempsey township north of the river, Lower Macleay, Smithtown, Gladstone,

Kinchela, Jerseyville, Bellimbopinni, part of Frederickton, and the Clybucca flats area with 3768 connections.

2.2. Everinghams Lane Booster Pump Station (variable speed flow located on Collombatti Rd) supplying Everinghams Lane and adjoining subdivisions comprising of 65 rural and residential properties.

2.3. Frederickton Reservoir (1.15ML) which gravity feeds 306 residential and non-residential properties areas in the eastern or lower areas of Frederickton and some properties on the Great North Rd.

2.4. Clybucca Reservoir (1.1ML) which gravity feeds 11 rural properties.

3. Potters Hill Pumps (approximately 40-50L/s) supplies Potters Hill Reservoir (13.65M) via 3.4km of 300mm DICL and 0.8km 400mm Poly mains. The Potters Hill Booster pump station increases the flow to 100L/s, during high demand periods. The reservoir supplies the following: 3.1. Serves South Kempsey township, part of Lower Macleay, Euroka and Dongdingalong

areas supplying 2262 connections. 3.2. Burnt Bridge Booster Pump Station (variable speed drive) which services the Burnt

Bridge supply areas of 40 rural properties. 3.3. Billy Goat High Lift Pumps (26L/s) supplies 6.6lm of 225mm PVC main to:

3.3.1. Billy Goat Hill Reservoir (2.15ML) which gravity feeds 198 rural & residential properties around the Crescent Head Rd area.

Total length of mains: Headwork mains – 26 km & Reticulation mains - 424 km



5.2. Sherwood Lime Plant Distribution Network

An alternative supply can be maintained via the Sherwood Lime Plant where water is received directly from the Sherwood Bore field, treated and then supplies the distribution system via Greenhill Reservoir. The John Lane booster pumps are required to supplement the supply of water to the John Lane Reservoir.

See APPENDIX G for the schematic representing the ‘alternative Kempsey supply’ when the Sherwood Lime Plant is in operation.

The distribution system operates in the following way:

1. Greenhill Reservoir supplies as per the following:

1.1. Gravity feeds the following sites; 1.1.1. The Kempsey township north of the river, Lower Macleay, Smithtown,

Gladstone, Kinchela, Jerseyville, Bellimbopinni, part of Frederickton and the Clybucca flats area 3768 connections.

1.1.2. Everinghams Lane Booster Pump Station (variable speed flow located on Collombatti Rd) supplying Everinghams Lane and adjoining subdivisions comprising of 65 rural and residential properties.

1.1.3. Frederickton Reservoir (1.15ML) which gravity feeds 306 residential and non-residential properties areas in the eastern or lower areas of Frederickton and some properties on the Great North Rd.

1.1.4. Clybucca Reservoir (1.1ML) which gravity feeds 11 rural properties

1.2. Pumped via John Lane lift pumps (2 x 10 L/s) to the John Lane Reservoir (3.5ML) 1.2.1. Water gravitates out of reservoir to supply Yarravel, Aldavilla and surrounding

areas, servicing approximately 665 rural & residential customers

1.3. Gravity feeds to Potters Hill Reservoir (13.65M) when motorised valve is opened 1.3.1. Serves South Kempsey township, part of Lower Macleay, Euroka and

Dongdingalong areas supplying 2262 connections. 1.3.2. Burnt Bridge Booster Pump Station (variable speed drive) which services the

Burnt Bridge supply areas of 40 rural properties. 1.3.3. Billy Goat High Lift Pumps (26L/s) supplies 6.6lm of 225mm PVC main to: Billy

Goat Hill Reservoir (2.15ML) which gravity feeds 198 rural & residential properties around the Crescent Head Rd area.



5.3. Storages

In the management of a water supply system, it is useful to know the capacity of storages expressed as days of storage rather than simply volumes or water levels. The following Table 13 & Table 14 list the storages, their capacities based on Average Day Demand (ADD) and Maximum Day Demand (MDD), Top Water Level (TWL), and the operational details and restraints as noted by KSC staff.

Table 13: KLM Storage Details

Storage Volume (ML)

Location Type TWL Comments

John Lane Reservoir

3.5 John Lane Rd Yarravel

Steel 80.95 Supplied by SM Dam pumps or alternate supply from John Lane Booster Pumps when from Sherwood Lime Plant supply.

Greenhill Reservoir

9.1 Queen St Greenhill Steel 63.33 Supplied by SM Dam pumps or alternate supply from John Lane Reservoir when Sherwood Lime Plant supply

Potters Hill Reservoir

13.6 Gowings Hill Rd South Kempsey

Concrete 55.0 Supplied by SM Dam pumps and Potters Hill Booster Pump Station

Frederickton Reservoir

1.15 off Great North Rd Frederickton

Steel 43.34 Supplied from Greenhill Reservoir

Clybucca Reservoir

1.1 Off Pacific Hwy Clybucca

Steel 31.8 Supplied from Greenhill Reservoir

Billy Goat Hill Reservoir

2.15 On Crescent Head Rd South Kempsey

Steel 64.0 Supplied from Potters Hill Reservoir and Billy Goat Hill Booster pump station.



Table 14: Operational details of storages

Storage Volume

(ML)

Operating levels % of storage

H –High level

L – Lower level

Minimal operational level ##

Reason for min level

Average Daily Demand (ML)

Max Daily Demand (ML)

John Lane Reservoir

3.5 97 H

92 L

40%

Estimate only

To ensure backup supply for Greenhill

0.5 0.7

Greenhill Reservoir

xx when from Sherwood Lime Plant

9.1 99 H

86 L

60%

Estimate only

Low pressures around Kempsey District Hospital

4.6

6.1 xx

5.0

7.0 xx


13.6 95 H

90 L

40% Low pressures experienced in Burnt Bridge area.

1.2 1.3


1.15 88^^H

85 L

20%

Estimate only

Supplies town only

Clybucca Reservoir

1.1 100 10% Minimal use from reservoir


2.15 100 H

91 L

70%

Estimate only

Low pressure along Crescent Head Rd

## Operation limits and emergency supply capabilities to be investigated and defined.

^^ Maximum level set at a lower limit, due to delays with telemetry signal, and response time before overflow occurs.

Action: KLM D 5.3

KSC to define the operational limits and emergency supply capabilities for each reservoir and include in the Emergency Management Plan.



5.4. Issues with Storages

Due to the limitations of the telemetry system (with regard to accuracy of level monitoring) and a lack of flow monitoring at all reservoirs, there is limited knowledge about the minimal operational capacity or consumption for each reservoir. It has been noted that operational limits and emergency supply capabilities for each reservoir need to be documented and include in emergency management plan.

The reservoirs are inspected on a monthly basis by operators and a more detailed inspection is undertaken by contractors as part of a scheduled inspection program. The following Table 15 highlights the main issues reported from the inspection program.

Table 15: Reservoir Inspection Reports

Storage Volume (ML)

Type Inspection

Date

Issues identified

John Lane Reservoir

3.5 Steel 08/2012 Improvements are required for security for access and sealing around the hatch. Corrosion has been identified internally and cathodic protection has been recommended.

Greenhill Reservoir

9.1 Steel 09/2011 Vermin entry is possible and the redundant pulley system should be removed to allow it to be sealed effectively. Corrosion is beginning to occur on floor and impressed CP has been recommended.


13.6 Concrete 08/2013 There are several section of roof sheeting and the ridge cap that need securing. The platform area has a number of drainage holes that would allow ponded water to enter the tank. The security fence can easily be bypassed by unauthorised persons.


1.15 Steel 03/2011 There is significant corrosion and an impressed CP system should be installed ASAP to slow down any further corrosion activity.

Clybucca Reservoir

1.1 Steel 03/2011 There are several deep corrosion pitted areas near the wall hatch, so a CP system should be fitted ASAP to control the problem.

The internal galvanized ladders, platforms and cages are corroded and would be adding to disinfection demand of the water supply.


2.15 Steel 03/2011

The ladder area is not secure against unauthorized access. There are several corrosion pits present in the floor coating but an impressed CP system should prevent any further deterioration from occurring.

The inlet has a full length riser fitted inside the tank this should be removed so that the incoming water can blend through the entire water column during the fill cycle.



6. MAJOR CLIENTS AND STAKEHOLDERS The KSC have a number of major clients and key stakeholders within the supply area, who draw treated water for industry and essential services use from the Kempsey system.

The following Table 16 lists the major clients and key community group associated with each of the main reservoir supply zones.

Table 16: Supply Zones and Major Clients

Reservoir or Pump supply

Major Client/Stakeholder Supply

Greenhill Kempsey District Hospital - River St West Kempsey

Booroongen Djugun Aboriginal Corporation - River St

Healthcare Property Funds Pty Ltd - Cochrane St West Kempsey

Macleay Senior Citizens Home Incorporated (Cedar Place) - Cochrane St

West Kempsey

Vincent Court Retirement Village - Leith St West Kempsey

Kempsey West Primary School - Marsh St West Kempsey

Kempsey High School - Wide St West Kempsey

St Pauls High School - Tozer St West Kempsey

St Joseph’s Primary School - Kemp St West Kempsey

NSW TAFE - Sea St West Kempsey

Kempsey Local Aboriginal Land Council (LALC) - Greenhill Community **

West Kempsey

Dialysis Patients x 2 Kempsey

Aldavilla Primary School - Sherwood Rd Aldavilla

Bellimbopinni Primary School - Pacific Hwy Bellimbopinni

Thompson Health Care (Macleay Valley House) - Macleay St Frederickton

Tolsat Pty Ltd (Everson’s Food Processors) - Great North Rd Frederickton

Frederickton Primary School - Great North Rd Frederickton

Gladstone Primary School - Darkwater St Gladstone

Macleay River Fishermans Co-Op - Main St Jerseyville

Kinchela Primary School - Right Bank Rd Kinchela Creek

Nestle Australia Ltd - Rawson St Smithtown

Smithtown Primary School - Cannane St Smithtown

John Lane Mid North Coast Correctional Centre - Aldavilla Rd Aldavilla

Potters Hill Kempsey East Primary School - Innes St East Kempsey

Kempsey South Primary School - Queen St South Kempsey

Melville High School - Nicholson St South Kempsey

Akubra Hats Pty Ltd - South St South Kempsey

Kempsey LALC - New Burnt Bridge Community ** South Kempsey

Billy Goat Hill Kempsey Adventist School - Crescent Head Rd South Kempsey

** KSC have a management plan with NOW and NSW Health to provide water and sewerage services to the same extent as elsewhere in Kempsey, except if specifically varied. Reference: ‘Crescent Head, Greenhill & New Burnt Bridge Aboriginal Water & Sewerage Management Plan V2’ NOW July 2011



6.1. Emergency Contacts

Table 17: Major Client Emergency Contacts

Agency or Business Person Phone

Emergency 000 000

Fire 000 000

Police Kempsey T: 02 6561 6199

SES Unit Controller for Kempsey SES Unit 132500

Hospital 119 River Street, Kempsey T: 02 6562 6155

Local Aboriginal Land Council Jo-Anne Kelly (CEO) T: 02 6562 8971

Department of Education Regional Office Port Macquarie

Regional Office Coffs Harbour

T: 02 6586 6900

T: 02 6652 0500

NSW Office of Water (NOW) Glenn George – Regional Manager

Graham Campbell – W & S Inspector

M: 0411449745

M: 0419 620 990

NSW Aboriginal Land Council Trent Lynwood T: 02 6659 1200

M: 0400 563 018

NSW Health – North Coast Public Health Unit

Kerryn Lawrence T: 02 6588 2750

AH: 0428 882 805

Action: KLM S 6.1.1

Management to develop a comprehensive Emergency contact list for integration into the Emergency Management Plan.



7. CUSTOMERS The following Table 18 contains a breakdown of the supply area and the average daily demand per connection. See APPENDIX J for a full listing of the type of connection associated with each reservoir and supply area.

Table 18: Kempsey Water Supply: Indicative Supply Statistics

System

Connections Av daily demand

kL/d

Av daily demand

per meter

kL/d Res Non

Res

Greenhill 3772 1402 3217.89 0.85

Potters Hill 2280 1213 1930.70 0.85

John Lane 671 146 600.21 0.89

Frederickton 242 8 126.00 0.52

Billy Goat Hill 203 17 124.90 0.62

Everinghams Lane Booster

62 16 35.99 0.58

Burnt Bridge Booster

28 4 18.04 1.39

Clybucca 13 12 22.72 0.81

Source: MapInfo data for 12 months from 28/08/12.

7.1. Dialysis Patients

Home dialysis patients are present in the Kempsey and Lower Macleay supply community, and as such, it is critical that they are considered during any management plan. Council has a documented procedure, in conjunction with local hospitals to ensure dialysis patient details remain up-to-date. KSC have also ensured that key valving arrangements which may affect such properties, are identified in the distribution system. A record of the most recent information regarding dialysis patient’s localities (including Lot ID, Assessment No, customers name, contact address, phone number) can be obtained from the following KSC file directory;

F:\UTILITIES\Water Services\WATER\DIALYSIS MACHINES



7.2. Raw water and Rising Main customers

There are a number of properties within the Kempsey system that currently have water supplied either as raw water or from the rising main. Customers are aware of issues relating to their supply and the following Table 19 contains information on the location and reason for the agreement.

Table 19: Raw water & Rising Main Customers

Location Issue

Sherwood Bore supply main Non disinfected supply to agricultural supply only

Potters Hill main from the SMDam Variable disinfection level to 4 services on the main. Service is maintained through connection to rain water tanks and only drawn when tanks are low.

7.3. Water Fill Stations

The Kempsey and Lower Macleay system has 3 water filling stations. Each water fill station has backflow prevention installed and is locked and can only be utilised through electronic access. Water carters are either licenced to deliver water for drinking water supply or for construction supply. All water carters are licenced through the Council’s Water Services section and carters that are providing water for drinking water supply are also inspected annually by Council’s Sustainable Development section. Licenced carters are provided with electronic access to the water fill stations and loads are monitored by Council’s Water Services section.

These fill stations are located at;

South St, South Kempsey

Cnr River St and Spooners Ave, Greenhill

Barnard St, Gladstone.



8. WATER QUALITY MONITORING

8.1. Monitoring Points

Verification of drinking water quality provides an assessment of the overall performance of the system at a single point in time. This monitoring demonstrates that the system is capable of providing water of the intended quality to all consumers, and can be conducted in house by KSC operational staff or by external laboratory services. The operational monitoring sites have been chosen across the supply to provide an understanding of the management of key characteristics of the system and allow for staff to make a response to abnormal or below operational and critical limits.

Operational monitoring can be conducted onsite by operators, by online data collection systems, and recorded either in data acquisition devices or log sheets. Key monitoring sites are checked 5 to 7 days per week, with other sites monitored weekly. Some sites have online alarm notifications triggered when target limits have been exceeded.

Typical operational monitoring schedules include:

Daily plant checklist

Dosing pump drop tests

Plant security checklist

Reservoir inspection checklist

Daily sampling schedule

External laboratory verification monitoring program has been developed in consultation with the North Coast Public Health Unit and is outlined below in section 9.2.

Other project monitoring is conducted on an as needs basis and is dependent upon funding availability.

Table 20 below identifies the routine sample point locations for each of the key supply areas, and lists the frequency and parameters tested. These sites have been chosen to provide the best representation of the Kempsey and Lower Macleay supply.

8.1.1. Distribution Monitoring

Located throughout the distribution system, the key monitoring sites in Table 21 are used by the KSC staff to validate and control water quality parameters (mainly disinfection) within the supply. Further investigative sampling is undertaken as required based on customer issues, water quality data including, chlorine mapping, compliance data and existing literature.



Table 20: Routine Water Quality Monitoring Sites Summary

Location Sampling points Frequency Monitoring

Bores Individual bores (in operation) Monthly pH, Tb, Fe Mn Al EC

(manual in-house testing)

Inlet to SMD inlet race (composite of supply bores in operation)

Weekly- Summer

Monthly - Winter

TN, TP (external laboratory)

Raw water rising main (located at Sherwood Lime Plant)

Continuous pH, EC, Temp, Tb (online instrumentation)

Steuart McIntyre Dam

Surface, lower level, and current offtake

Continuous pH (online instrumentation)

Surface, 4, 8 & 12 m and bottom depths.

Continuous DO, Temp (online instrumentation)

Composite sample surface, 4, 8 & 12 m and bottom depths

Weekly- (Oct – April) **

Monthly – (May – Sept)**

TN, TP (external laboratory)

Composite sample surface, 4, 8 & 12 m and bottom depths

Monthly (increased depending on detection) **

Taste & Odour

As MIB & Geosmin (external laboratory)

Surface, 4, 8 & 12 m and bottom depths.

Bi-weekly- (Oct – April) **

Monthly – (May – Sept)**

Total Algae with alternate fortnight testing for Blue Green Algae only (external laboratory)

SMD WTP Inlet to WTP Daily (Mon – Frid) pH Tb (manual in-house testing)

Reservoirs

Outlets of Greenhill, John Lane, Potters Hill ,Billygoat, Clybucca, & Fredrickton

Daily (Mon – Frid)

Greenhill, John Lane & Potters Hill Reservoirs

(7 days)

pH, Tb, Free Cl2, Total Cl2 (manual in-house testing)

Reticulation Distribution as per site list below Weekly pH, Tb, Free Cl2, Total Cl2. (manual in-house testing)

Distribution

(Sites rotated)

Monthly Full Chemical*(external laboratory)

Distribution

(Sites rotated)

Weekly Micro (Ecoli, Total Coliforms) (external laboratory)

** Sample frequency may change due to algae occurrence.

All testing conducted at NATA Laboratory unless stated as an in-house field sample.

The full chemical and the microbiological analysis is conducted by FASS (NSW Health funded)

*Full Chemical incudes: Alkalinity (as CaCO3), Aluminium, Ammonia (NH3), Antimony, Arsenic, Barium, Boron, Cadmium, Calcium, Chloride, Chromium, Colour (true), Copper, Cyanide, Fluoride, Iodide, Iron, Lead, Manganese, Mercury, Molybdenum, Nickel, Nitrate, Nitrite, pH, Phosphorus, Potassium, Selenium, Silver, Sodium, Silica (as SiO2), Sulphate, Total Dissolved Solids (TDS), Total Hardness as CaCO3, Total Organic Carbon, Turbidity, Uranium and Zinc.



Table 21: Kempsey sampling sites for water quality verification

NSW Health Water Supply Code

NSW Health Sample

Site/Code

Site Name Location Address

Monitoring

Op

era

tio

nal

NSW

Hea

lth

01 Kempsey Supply

121 Kempsey Tap at Women’s Health Centre

Memorial Ave Kempsey

X X

122 Kempsey Tap at K29 Pump station

Marramah St Greenhill Community

X X

123 Kempsey Riverside Park Kempsey

X

346 Kempsey Sewerage Treatment Works tap

STW Woodford Cres South Kempsey

X X

345 Kempsey Moores Nursery 191 Sherwood Rd Yarravel Kempsey

X

124 Jerseyville Fish Co-Op South West Rocks Rd Jerseyville

X X

456 Smithtown Smithtown Baby Clinic

44 Church St

Smithtown X X

234 Clybucca Tap at Clybucca Reservoir

Pacific Hwy Clybucca

X X

342 Aldavilla Tap at airport building

Airport Rd Aldavilla

X X

799 Frederickton Tap at F1 pump Station

Lawson St Frederickton

X X

432 New Burnt Bridge

Community

Water tap at K26 pump station

Gowing Hill Rd New Burnt Bridge Community

X X



8.2. NSW Health Compliance Monitoring Points

Verification monitoring is used to assess the overall performance of the system and, ultimately, the quality of the drinking water being supplied to consumers.

Verification provides confidence for consumers about the quality of the water, and it is a useful indication of problems within the water supply system that may need correction or an incident/emergency response.

The compliance monitoring program has been developed in consultation with the North Coast Public Health Unit. NSW Health has recommended a minimum number of samples for each water supply to monitor drinking water quality.

NSW Health provide a free of charge service for the recommended number of samples for indicator bacteria and a range of chemical parameters.

The number of samples allocated to a water supply is determined by the population served.

Based on the total population served by the KLM supply, a total of 272 microbiology samples and 12 chemical samples are taken from the towns and villages in this system each year

The KSC operational staff are trained in how to take the samples, package them and send them to the laboratory in a timely manner.

It is a requirement of the laboratory to notify the local Public Health Unit immediately of any monitoring result that exceeds a health guideline value in accordance with the NSW Health Response Protocol for the management of microbiological quality of drinking water. http://www.health.nsw.gov.au/publichealth/environment/water/nswhrp_microbiological.asp

Detailed locality plans showing reticulation and water quality sampling points have been developed in conjunction with the North Coast Public Health Unit and these diagrams are available from KSC mapping system.

Table 21 contains the NSW Health sample zones and registered sampling locations, including the sites used for operational and field monitoring.

8.2.1. Compliance

Table 22 summarises the compliance as per the NSW Health Drinking Water Monitoring Program, for the treated water between 01 January 2006 and 13 August 2013. This table includes only the parameters where exceedances were evident. Table 22 does not include all other parameters tested in the Monitoring Program, and a summary table of all parameters tested has been included in APPENDIX M. This information is recorded on the NSW Health Drinking Water Database and is available to KSC staff with a secure password. This information is reviewed on an as needs basis and forms part of the Councils commitment to provide compliance data for various regulatory requirements.

NSW Performance Monitoring System Annual reporting of water supply and sewerage system performance, including drinking water quality and complaints, is required under the NSW Best-Practice Management Framework and the National Water Initiative.



Table 22: Drinking Water Quality Data

Parameters No. of

Samples

Min Mean Max ADWG

guideline value

No. of exceedances

pH Field 1684 0.37 7.62 9.5 6.5 - 8.5 62

Turbidity Field

(NTU)

398 0 1.88 17.7 5* 13

Total coliforms

(MPN/100 ml)

1727 <1 <1 202 N/A 61 samples > 1

E.coli (MPN/100 ml)

1727 <1 <1 110 0 2

Aluminum

(mg/L)

86 0.005 0.07 0.68 0.2 (aesthetic) 6

Copper

(mg/L)

86 0.0025 0.12 2.67 2 1

Iron

(mg/L)

86 0.005 0.05 0.32 0.3 (aesthetic) 1

Lead

(mg/L)

86 0.001 0.0018 0.018 0.01 1

Turbidity Chem (NTU)

86 0.1 0.87 5.9 5 1

*ADWG desired turbidity at the point of disinfection is 1 NTU, as per 2011 guidelines

Source: NSW Health Data Base with date range 01 Jan 2006 to 13 August 2013

To understand the water quality issues for the Kempsey Lower Macleay Supply, trend graphs for the following parameters have been prepared and available in APPENDIX K. These graphs have been developed using the raw data from the NSW Health Drinking Water Database, from January 2006 to January 2012. The graphs indicate compliance against ADWG guideline and aesthetic levels for the following parameters:

Lead

Iron

Aluminium

Copper

Manganese

pH

Turbidity

Total Coliforms



8.3. Issues Identified by Water Quality Monitoring

A review from the NSW Heath monitoring program since 2006 has identified only one health exceedance for each of Lead, Aluminium and Copper and aesthetic exceedances for Iron. The review has also identified numerous exceedances for the desirable level of 1 NTU for turbidity and the guideline limits for pH and Turbidity. One significant event to note occurred in May 2009, where a major flood event was experienced across the North Coast region of NSW. The KLM system was impacted by this flood event resulting in the higher spikes in water quality data observed in the graphs contained in APPENDIX K.

Of significant concern is that there are numerous exceedances for the ADWG guideline and desirable limits for Turbidity (5 NTU & 1NTU respectively), as indicated in Figure 12 in APPENDIX K. Previously the ADWG had the limit of 5 NTU but this was reduced to 1 NTU as the desirable level in the ADWG 2011 update. The ADWG state that high turbidity has been shown to shield microorganisms from the action of disinfectants, and if turbidity in a water supply exceeds 1 NTU, adequate disinfection may be more difficult to maintain.

These numerous exceedances are due to the lack of filtration on the Kempsey and Lower Macleay drinking water supply system. Without full water treatment (filtration combined with effective coagulation, flocculation and clarification) a low turbidity is not guaranteed for the Kempsey Supply. As the Kempsey Catchment area has some pathogenic risk of contamination, at higher turbidity levels, there is no guarantee that the Kempsey and Lower Macleay drinking water system is adequately disinfected. This has been identified as a significant risk for the Kempsey system.

Other operational issues have been identified as the following:

Taste and odour issues from algal growth in Steuart McIntyre Dam

Low chlorine residuals in reticulation mainly in Jerseyville, Kinchela and Frederickton.

Low turnover rate and chlorine levels in Clybucca reservoir

When the Sherwood WTP is in operation, the excess lime deposits in the Greenhill Reservoir

Four customer services experience high disinfection levels on the rising main to Potters Hill Reservoir

No operational control over high pH levels experienced from the Steuart McIntyre Dam supply

Dirty water can be experienced within the supply system, typically in immediate vicinity after main breaks or major operational works.

8.4. Issues Identified by Customer Complaints

Monitoring of customer satisfaction can provide valuable information on potential problems that may not be obvious from normal monitoring.

Issues raised by the community are recorded within the ‘Customer First’ system where a work order is created for action and response. Water quality complaints are forwarded onto the Technical Officer Water Process, and for pressure, loss of water or dirty water resulting from mains breaks, are forwarded onto the KSC Maintenance section. The Work Orders are issued through email and once a response is competed the orders are finalised with comments of actions taken.



The following Table 23 summarises formal customer water quality complaints for the period Jan 2007 to Aug 2012.

Table 23: Kempsey Customer Water Quality Complaints Jan 2007 to Aug 2012

Supply Area Town Area

Dir

ty

Wat

er

Tast

e &

Od

ou

r

Air

in

Pip

es

Illn

ess

Oth

er

Tota

l

Clybucca Reservoir

Clybucca 2 2

Fredrickton Reservoir

Fredrickton 6 3 9

Greenhill Reservoir

Bellimbopinni 2 2 1 5

Belmore River 2 2

Gladstone 2 2 4

Kempsey 16 4 20

West Kempsey 33 10 43

Kinchella 3 3

Smithtown 1 1

Smithtown Summer Island

1

1

Smithtown Seven Oaks

4

4

John Lane Reservoir

Aldavilla 1 1

Yarravel 8 5 1 14


Austral Eden 1 1

Dondingalong 1 1

East Kempsey 15 4 1 20

Euroka 5 1 1 7

South Kempsey

19 5 24

Verges Creek 2 2

Total 122 37 3 0 2 164

Source: NSW Benchmarking Reports



When the Sherwood Lime Plant is in operation, some customers in the West Kempsey and Yarravel areas experience lower pressure. This is due to the Sherwood bores being run in during an ‘off peak’ power time (non-operational during 7-9.00am and 6-8.00pm hours) which coincides with the higher demand for water use period (resulting in lower reservoir levels) and Greenhill reservoir being the feed reservoir for the entire supply.

It is a requirement of KSC to manage and record any issues experienced by the Burnt Bridge and Greenhill Communities within the Community Issues Register as per the template provided in the ‘Crescent Head, Greenhill & New Burnt Bridge Aboriginal Water & Sewerage Management Plan V2’ NOW July 2011.



9. RISK ASSESSMENT WORKSHOP A risk assessment review was conducted on all the stages of the KLM supply from catchment to consumer with the details of this review contained in a Kempsey Lower Macleay Risk Assessment spread sheet (see APPENDIX P). For each of the hazards identified, an assessment was conducted on the initial risk or maximum risk to the water supply if no controls were in place, and a residual risk for when KSC have implemented the processes and controls for the identified hazard and hazardous event.

The risk review categorised the supply into the following areas:

1. Catchment – Macleay River Catchment area including the Recharge channel. 2. Sherwood Bores – Including aquifer and bore field. 3. Steuart McIntyre Dam – Dam and surrounding catchment zone. 4. Treatment – Steuart McIntyre Dam treatment facilities and the Sherwood Lime dosing

plant. 5. Reservoirs – Service reservoirs located in distribution system. 6. Distribution – the pumps pipes and customer connections. 7. Whole of Supply – The overall processes relevant to the management and effective

delivery of water supply.

A risk workshop was conducted over a number of days, commencing on the 1st of May 2012. Throughout the workshop days, attendance was mixed to ensure that appropriately knowledgeable people attended the risk areas addressed for their areas of expertise. Following on from the workshop, the risks were further developed and reviewed by the Manager Water Process, with the aid of the relevant sections as required. The team involved over the workshop days is listed below in Table 24. The workshop participation list and meeting minutes are included in APPENDIX N.

Table 24: KLM Risk Assessment and Water Supply Review Workshop Participants

ATTENDEES:

Name Organisation Position

Jillian Busch Aqualift Project Delivery & DBS

Scientific Officer & Risk Workshop facilitator

Jodie Shelley KSC Administration Officer

Belinda Green KSC Manager Water Process

Anne Maree Burke KSC Manager Water Strategy

Todd Graham KSC Water Process Technical Officer

Peter Anderson KSC Water Process Support Technical Officer

Garry Boatswain KSC Water Process Operator

John Hewerdine KSC Water Process Operator (new staff member)

Shannon Miranda KSC Water Process Operator

Peter Winn KSC Water Operations Maintenance

Peter Ingold KSC Water Operations Construction

Scott Brown KSC Water Process Operator

Jason McManus KSC Water Process Operator

Jeff Phillips KSC Water Operations Maintenance

Kerryn Lawrence NC Public Health Unit Senior Environmental Health Officer Invitations were also sent to representatives of NSW Office of Water but they were unable to attend



9.1. Risk review summary

The risk assessment review of the KLM water supply identified 63 hazardous events and measures relating to the system.

The following Table 25 and Table 26 contain a summary of the initial risk (an indication of worst-case scenarios in the event of failures without controls) and the residual risk. The detailed risk assessment tables are provided in APPENDIX P and details the existing preventive controls/ measures in place, the effectiveness of these existing strategies, and the actions suggested for any improvements.

Table 25: Summary of Initial Risks identified

Initial Risk Very High High Moderate Low Total

Macleay River Catchment 2 4 2 0 8

Sherwood Bores 0 4 1 0 5

Steuart McIntyre Dam 5 1 2 0 8

Treatment 5 3 0 2 10

Distribution Reservoirs 6 3 0 0 9

Distribution 5 4 0 0 9

Whole of Supply 12 2 0 0 14

Total 35 21 5 2 63

The main high risks identified for the initial risk:

1. Catchment: storm events leading to turbidity, pathogens from rural and agricultural impacts upstream, and chemical spills.

2. Sherwood Bores: flood impact and rural and agricultural pathogens ingress. 3. Steuart McIntyre Dam: algae growth resulting in BGA toxins, T&O and suspended

solids, the inversion of the dam resulting in water quality changes and bushfire impact within the dam catchment area.

4. Water Treatment: control of treatment chemicals and monitoring. 5. Reservoirs: ingress of contamination, malicious events due to unauthorised access to

locations, control of disinfection levels, stagnation and loss of water level control. 6. Distribution: ingress of contaminates due to back flow or illegal connections,

unsanitary repairs or commissioning of new mains, loss of pressure due to pump failure.

7. Whole of supply: non-qualified contractors working on sites, lack of telemetry or online control of systems, materials not fit of contact with drinking water, aging infrastructure and faulty instrumentation.



Table 26: Summary of Residual Risks identified

Residual Risk Very High High Moderate Low Total

Macleay River Catchment 0 0 5 3 8

Sherwood Bores 0 1 3 1 5

Steuart McIntyre Dam 0 0 2 6 8

Treatment 0 5 2 3 10

Distribution Reservoirs 1 2 5 1 9

Distribution 2 5 0 2 9

Whole of Supply 3 9 0 2 14

Total 6 22 17 18 63

The residual very high and high risks identified, after controls had been assessed include the following:

1. Short circuiting of contaminates through bores due to well casing failure. 2. Water Treatment: control of treatment chemicals, monitoring and site security. 3. Reservoirs: stagnation of water, introduction of contaminates due to malicious

activity, low chlorine and lack of alarms for low levels. 4. Distribution: ingress of contaminates due to back flow or illegal connections,

unsanitary repairs or commissioning of new mains, loss of pressure due to pump failure.

5. Whole of supply: non-qualified contractors working at sites, materials not fit for use in contact with drinking water, delay in receiving/responding to abnormal water testing results, and human error resulting in a water quality failure.



Figure 5 below, displays the overall initial and residual risks for the Kempsey and Lower Macleay supply system.

Figure 5: Overall risk ratings for the KLM supply

It should be noted that the initial risk of water quality issues experienced in the dam were very high and rely on the introduction of the Sherwood Lime plant as an alternative supply to reduce the initial risk. This demonstrates the importance of the Sherwood Lime Plant as critical infrastructure while there are no full water treatment facilities at the dam.

9.2. Implementation Plan

An Implementation Plan has been developed for the Kempsey and Lower Macleay Drinking water supply system, and is included in APPENDIX Q. The Implementation Plan captures the recommended improvements identified through the risk assessment and as noted throughout this document. The Implementation Plan includes indicative dates for implementation and the nominated responsible person. This Implementation Plan will be reviewed and integrated with the other Kempsey Supply systems implementation actions plans and developed into a Kempsey wide Implementation Plan, as part of the Kempsey Shire Council Drinking Water Management System, which is still to be developed.

0

5

10

15

20

25

30

35

40

Very High High Moderate Low

No

of

Ris

ks

Initial

Residual



9.3. Critical Control Points

During the Risk Assessment Workshops a number of Critical Control Points (CCP) were identified, according to the critical control point methodology. Target, Alert and Critical Limits were identified for each CCP, and the response protocols in the event of breach of Alert or Critical Limits were recorded. A summary of the current CCPs developed for the Kempsey and Lower Macleay drinking water supply system is provided below in Table 27. The detailed CCPs including monitoring, actions, responsibilities and notifications are included in APPENDIX O. These have been developed as quick reference documents for staff to utilised on a day to day basis, when running the system.

Table 27: Summary Critical Control Points for Kempsey Lower Macleay Supply

System CCP ID Control Point Hazard Control

Parameter Target Alert Level Critical Limit

Kem

psey a

nd L

ow

er

Macle

ay

KLM1 Bore water extraction

All pathogens

Turbidity <1 NTU >2 NTU >5 NTU

KLM2 SM Dam water

Extraction

All pathogens

Turbidity <1 NTU >2 NTU >5 NTU

Taste & Odour

Algae No detected T&O or

Algae biovolume below detection limit

Noticeable T& O or Algae biovolume at alert level

1

MIB/Geosmin > 10 ug/L or Algae biovolume at alert level 2

KLM3 Disinfection All

Pathogens Free

Chlorine 1.5 mg/L 1 mg/L 0.8 mg/L

KLM4 Reservoirs

All pathogens

and all chemicals

Reservoir integrity

No breach of integrity Any sign of integrity breach Evidence of contamination

KLM5 Distribution All

pathogens Free

Chlorine >0.3mg/L <0.2 mg/L </=0.1 mg/L



10. REFERENCES Reference 1. ADWG (2011) - NHMRC/NRMMC (National Health and Medical Research

Council/ Natural Resource Management Ministerial Council) Australian Drinking Water Guidelines (ADWG) National Water Quality Management Strategy.

Reference 2. Heavy Metal Loadings of Streams in the Macleay River Catchment Paul Ashley and Ben Graham Earth Sciences, University of New England, Armidale, NSW March, 2001.

Reference 3. Kempsey Shire Council Macleay Water Integrated Water Cycle Management Strategy (2005).

Reference 4. Kempsey Local Government Area – Ground Water Assessment Sherwood Borefield. Sherwood Borefield Model Development, Calibration and Scenarios. Department of Commerce. 2003

Reference 5. Kemsley, R (2011)The Sherwood Borefield Environmental Rehabilitation Plan Kempsey Shire Council

Reference 6. Kempsey Local Government Area – Ground Water Assessment Coastal Borefield. Model Development, Calibration and Scenarios for the Borefields at Crescent Head, Hat head and South West Rocks. Department of Commerce (2003)

Reference 7. Report for the National Water Commission – Sustainable Management of Coastal Ground Water Resources & Opportunities for Further Development: Hydrogeology, Monitoring and Hydrochemistry for the Macleay Sands Aquifer (2011)

Reference 8. http://www.legislation.nsw.gov.au/maintop/scanact/inforce/

Reference 9. Macleay Water Strategic Business Plan for Water Supply and Sewerage Services Jan 2006

http://www.legislation.nsw.gov.au/maintop/scanact/inforce/



MACLEAY RIVER CATCHMENT MAP



KEMPSEY LOWER MACLEAY SUPPLY OVERVIEW SCHEMATIC



KLM SUPPLY SYSTEM ZONE MAP



AERIAL PHOTO OF STEUART MCINTYRE DAM



PROPOSED OPERATING STRATEGIES FOR MAINTAINING ENVIRONMENTAL FLOWS IN MACLEAY RIVER

A balance between security of supply to consumers during drought and the protection of the in stream ecology is to be maintained by regulating the pumping allowances from the Macleay River according to the environmental flows in the river. The operating rules set out in the table below will apply.

Macleay River Flows** Sherwood Borefield Pumping Allowance

Other Conditions

Above 80th percentile Max capacity up to 32 MLD Pumping from the Sherwood borefield and the Belgrave pumping station do not reduce Macleay River flows below 80th percentile.

Below 80th percentile Maximum 8.5 MLD (long term drought capacity)

No pumping from the river to the borefield recharge channel

Below 80th percentile but above 95th percentile

Maximum 20 MLD (long term drought capacity)

Only when-

Dam storage <35% of active storage capacity (1000ML); and

Water demand restrictions are brought into place and restrict water to 80% of normal demand.

Pumping from river to borefield recharge channel allowed.

Below 95th percentile Maximum 8.5 MLD (long term drought capacity)

Only when:

Dam storage <35% of active storage capacity (1000ML); and

Water demand restrictions are brought into place and restrict water to 80% of normal demand.

**The Macleay River flow is to be measured at the Turners Flat gauging station and established on the basis of the average monthly percentile value.

Source: Fattorini Creek Dam Operations Management Plan by CMPS&F Environmental. Feb 1998



STEUART MCINTYRE DAM WATER LEVELS AND ALERTS



SHERWOOD ALTERNATIVE SUPPLY SCHEMATIC



KEMPSEY SUPPLY AHD STORAGE SCHEMATIC



SHERWOOD BOREFIELD AERIAL PHOTOGRAPH



KEMPSEY LOWER MACLEAY WATER SUPPLY CONNECTIONS

Connection type No.

Billygoat Hill Agriculture 4 Council Building - Public Use 1 Non Residential 3 Residential 190

TOTAL 198

Connection type No. Clybucca Agriculture 2 Non Residential 1 Residential 8

TOTAL 11

Connection type No. Frederickton Agriculture 6 Council Building - Public Use 2 Residential 271 Non Residential 23 Parks Ovals 1 Sewer Installations 1 Water Installations 2

TOTAL 306

Connection type No. Greenhill Agriculture 335

Council Building - Public Use 36 Residential 2928 Non Residential 408 Parks Ovals 33 Sewer Installations 28

TOTAL 3768

Connection type No.

John Lane Agriculture 36 Council Building - Public Use 3 Residential 604 Non Residential 20 Water Installations 2

TOTAL 665

Connection type No.

Potters Hill Agriculture 261

Council Building - Public Use 5 Residential 1783 Non Residential 181 Parks Ovals 13 Sewer Installations 19

TOTAL 2262

GRAND TOTAL 7210



KLM WATER QUALITY GRAPHS

Figure 6 KLM supply treated water Lead levels

Figure 7 KLM supply treated water Iron levels

0

0.002

0.004

0.006

0.008

0.01

0.012

0.014

0.016

0.018

0.02

Lead

(m

g/L)

Sample Date

Lead Retic sample ADWG Max

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

Iro

n (

mg/

L)

IronRetic Sample ADWG Aesthetic Limit



Figure 8 KLM supply treated water Aluminium levels

Figure 9 KLM supply treated water Copper levels

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

Alu

min

ium

(m

g/L)

Sample Date

Aluminium Retic Sample ADWG Aesthetic limit

0

0.5

1

1.5

2

2.5

3

Co

pp

er

(mg/

L)

Sample Date

Copper Retic Sample ADWG limit



Figure 10 KLM supply treated water Manganese levels

Figure 11 KLM supply treated water pH levels

0

0.002

0.004

0.006

0.008

0.01

0.012

Man

gan

ese

(m

g/L)

Manganese - ADWG Aesthetic Limit 0.1mg/L

Retic Sample

6.00

6.50

7.00

7.50

8.00

8.50

9.00

pH

Sample Date

pH ADWG Max pH ADWG Min pH



Figure 12 KLM supply treated water Turbidity levels

Figure 13 KLM supply treated water Total Coliforms (CFU)

0

1

2

3

4

5

6

7

Turb

idit

y N

TUTurbidity Retic Sample ADWG Lower Limit ADWG Upper Limit

0.01

0.1

1

10

100

1000

Co

lon

y fo

rmin

g u

nit

s p

er

10

0m

l

Sample Date

Total Coliforms

KS01121 Retic Sample KS01234 Retic Sample KS01456 Retic Sample



KSC STEUART MCINTYRE DAM ALGAE MONITORING AND RESPONSE PROCEDURE

Algae alert levels are now reported on the Total Biovolume mm3/L

Detection Level: low alert ≥0.05 & <0.2 mm3/L (Total Cyanobacteria) or ≥500 & <2000

cells/ml of Microcystis aeruginosa.

Alert Level 1: Medium alert ≥0.2 & <0.6 mm3/L (Total Cyanobacteria) or ≥2000 & <6500

cells/ml of Microcystis aeruginosa.

Alert Level 2: High alert ≥0.6 & <6 mm3/L (Total Cyanobacteria) or ≥6500 & <65000 cells/ml

of Microcystis aeruginosa.

Alert Level 3: Very high alert ≥6 mm3/L (Total Cyanobacteria) or ≥65000 cells/ml of

Microcystis aeruginosa.

KSC Response to algal presence

Detection Level

Weekly sampling for biovolume and cell counts

Regular visual inspection of water surface (boat and vehicle)

Alert Level 1

Notify NCPHU

Increase sampling frequency to 2x weekly at the offtake and at representative locations in

the reservoir to establish population growth and spatial variability in dam water

Establish the representativeness (i.e. variability) of the offtake samples over time

Decide on requirement for toxicity assessment or toxin monitoring

Isolate the dam supply and use Sherwood Lime Plant directly from Sherwood Bores.

Weekly sampling is continued until 3 consecutive weeks where the levels have dropped

back down under Alert Level 1

Alert level 2

Advice from health authorities on risk to public health, i.e. health risk assessment

considering toxin monitoring data, sample type and variability, effectiveness of available

treatment

Consider requirement for advice to consumers

Continue monitoring as per Alert Level 1

Toxin monitoring of water supply (finished water) may be required, dependent upon advice

from the relevant health authority



Alert Level 3

Immediate notification of NCPHU if this has not already occurred at Level 1 or 2

Requires advice to consumers

Toxicity assessment or toxic measurement in source water and drinking water supply if not

already carried out

Continue monitoring as per Alert Level 1

In absence of treatment and subject to health risk assessment this level may require

alternative contingency water supply

Continue toxin monitoring after cell numbers significantly decline (e.g. for 3 successive zero

results)

The Alert Level Framework is based around data from cyanobacterial cell counts and equivalent cell biovolume. These are used in conjunction with relevant drinking water guidelines for toxins and the potential hazard from a cyanobacterial bloom. Cell counts allow for prompt measurement and the consequent management actions. Toxin testing can have slow turn-around time for results and are not so widely available. The cell counts (and biovolume) are regarded as an indicator or ‘surrogate’ for a potential toxin hazards. Cell counts do not replace toxin analyses, but are used as relatively conservative triggers in the management plan. The counts can be used to prompt toxin monitoring, which can then be assessed in relation to the relevant guideline to determine the hazard and risk.

Source: CRC FOR WATER QUALITY AND TREATMENT – RESEARCH REPORT 74



NSW DRINKING WATER DATABASE RESULTS

Parameters Units Sample Count

Min Mean 95th Percentile

Max Guideline Value

Units Exception Count

Aluminium mg/L 86 0.005 0.0672 0.27 0.68 0.2000 mg/L 6

Antimony mg/L 86 0.0005 0.0007 0.001 0.001 0.0030 mg/L 0

Arsenic mg/L 86 0.0005 0.0008 0.001 0.001 0.0100 mg/L 0

Barium mg/L 86 0.0025 0.0172 0.025 0.029 2.0000 mg/L 0

Boron mg/L 86 0.05 0.0500 0.05 0.05 4.0000 mg/L 0

Cadmium mg/L 86 0.00025 0.0003 0.00025 0.00025 0.0020 mg/L 0

Calcium mg/L 86 5.7 15.9794 27.5 35.8 10000.0000 mg/L 0

Chloride mg/L 86 12.6 21.0581 27 37 250.0000 mg/L 0

Chromium mg/L 86 0.0025 0.0029 0.006 0.008 0.0500 mg/L 0

Copper mg/L 86 0.0025 0.1198 0.297 2.67 2.0000 mg/L 1

Fluoride Background

mg/L 86 0.05 0.0722 0.12 0.14 1.5000 mg/L 0

Iodine mg/L 86 0.01 0.0155 0.03 0.03 0.5000 mg/L 0

Iron mg/L 86 0.005 0.0529 0.14 0.32 0.3000 mg/L 1

Lead mg/L 86 0.001 0.0018 0.004 0.018 0.0100 mg/L 1

Magnesium mg/L 86 1.96 5.7864 7.59 8.01 10000.0000 mg/L 0

Manganese mg/L 86 0.0025 0.0028 0.005 0.01 0.5000 mg/L 0

Mercury mg/L 86 0.00005 0.0001 0.00005 0.0001 0.0010 mg/L 0

Molybdenum mg/L 86 0.0025 0.0026 0.0025 0.005 0.0500 mg/L 0

Nickel mg/L 86 0.005 0.0051 0.005 0.01 0.0200 mg/L 0

Nitrate mg/L 86 0.5 2.1663 8 12 50.0000 mg/L 0

Nitrite mg/L 86 0.05 0.0936 0.3 0.5 3.0000 mg/L 0

pH 86 6.5 7.6663 8.1 8.3 6.5 - 8.5 0

Selenium mg/L 86 0.001 0.0011 0.002 0.003 0.0100 mg/L 0

Silver mg/L 86 0.001 0.0010 0.001 0.001 0.1000 mg/L 0

Sodium mg/L 86 11.4 16.7453 20 21 180.0000 mg/L 0

Sulfate mg/L 86 4 7.5151 10 11 500.0000 mg/L 0

Total Dissolved Solids (TDS)

mg/L 86 90 110.1163 139 164 600.0000 mg/L 0

Total Hardness as CaCO3

mg/L 86 36 63.7430 95.6 120.5 200.0000 mg/L 0

True Colour Hazen Units (HU)

86 0.5 1.3105 5.2 8 15.0000 Hazen Units (HU)

0

Turbidity NTU 86 0.1 0.8674 2.4 5.9 5.0000 NTU 1

Zinc mg/L 86 0.005 0.0224 0.04 0.34 3.0000 mg/L 0

E. coli mpn/ 100 mL

1727 0 0.0643 0 110 0.0000 mpn/100 mL

2

Free Chlorine Field

mg/L 1686 0 0.7891 1.62 8.38 0.2 - 5 mg/L 228

pH Field 1684 0.37 7.6252 8.41 9.5 6.5 - 8.5 62

Total Chlorine Field

mg/L 306 0.11 1.3499 2.2 3.3 5.0000 mg/L 0

Total Coliforms mpn/ 100 mL

1727 0 1.7058 0 202 0.0000 mpn/100 mL

61

Turbidity NTU 398 0 1.8824 4.43 17.7 5.0000 NTU 13

Source: NSW Health Data Base Date range from 01/01/2006 to 13/08/2013.



WORKSHOP ATTENDANCE & MINUTES

Drinking Water Quality Risk Assessment Workshop 1st May 2012 Location: Kempsey SC Committee Room

Worksop facilities: Lap top with data projector (KSC) / Flip charts and pens (JB) / Flip Chart

stand (KSC) / Kempsey Water catchment to customer Flow Diagram (Rad)

ATTENDEES:

Name Organisation Position

Jillian Busch Aqualift Potable Diving & DBS

Scientific Officer & Risk Workshop facilitator

Jodie Shelley KSC Administration Officer

Belinda Green KSC Manager Water Process

Anne Maree Burke

KSC Manager Water Strategy

Todd Graham KSC Water Technical Officer

Garry Boatswain KSC Water Process Operator – Stuarts Point to Crescent Hd

John Hewerdine KSC Water Process Operator (new staff member)

Shannon Miranda KSC Water Process Operator – SM Dam – reticulation

Peter Winn KSC Water Operations Operator (Maintenance) – Water & Sewer

Peter Ingold (for afternoon session)

KSC Water Operator (Construction)

Scott Brown KSC Water Process Operator – SWR Recycle Plant, previously at SM Dam for 4yrs

Kerryn Lawrence NSW Public Health

Senior Environmental Health Officer

WORKSHOP PROGRAM - DRAFT

Time Content Who

10.00- 10.15am Introductions and outline of day program

JB

10.15 – 10.45am Kempsey Water Supply Overview Todd

10.45 – 11.15am WQ data review and summary on known issues within system

JB & All

11.15 – 12.30pm Catchment Review All

12.30 – 1.00pm Lunch

1.00 – 2.30pm Treatment and Distribution Review All

2.30- 2.45pm Break

2.45 – 3.45pm Review continues All

3.45 – 4.00pm Summary of workshop findings and future needs

JB

4.00pm Close



Kempsey Shire Council Drinking Water Quality Risk Assessment Workshop 1st May 2012 Validate & verify what Council is doing to ensure quality of service to KSC customers.

Identify what we need to develop (eg procedures) and put documentation in place for

all processes.

Kempsey Water Supply Overview by Todd Graham:

Flushing

KSC bores are raised

Previously used cell count at Dam however now using bio volume

Longer runs through bio volume

Reach taste & odour before bio volume – in summer period more monitoring is

conducted to obtain early indication

Steam kettle and smell to test

CRITICAL CONTROL POINT - Individual Sodium Hypochloride pumps at

Dam need to be rectified as it is a temporary system

Critical alarm incidents from chlorine pump issues transmits to on call phone, trips it

out but the pumps continue to operate as it does not stop pump function. This means

untreated water gets transferred to 3 Reservoirs being Johns Lane, Potters Hill and

Greenhills

Don’t have any monitoring of chlorine levels. Monitored by Operators including on

weekends

Bellimbopinni – gas chlorine, flow dosing, tested and adjusted by Operators

Frederickton – half the town comes off Greenhills Reservoir & half from


Clybucca Reservoir:

1. Has limited users/customers (less than 20 houses). Chlorine residual is low

due to the low number of consumers.

2. Always running, to allow it to drop we require installation of mains power &

new control valve. Already have a level sensor at site. This will enable the

use of Portacall portable chlorine dosing system to inject chlorine as it leaves

the Reservoir instead of using the current method of tablet chlorine dosing to

slug dose

Remote customers – Peter Winn & Gary Boatswain want a standpipe to allow them

to conduct tests on site. Todd has organised quotation for sample taps from Scott’s

Hydraulics to put in place.

When pump from Dam to Potters there are 4 customers off the rising main – they are

getting chlorine residual readings of about 4 (advised Scott Brown)

Jerseyville, Boyter’s Lane & Sewers Rd all have low chlorine residuals. Sample tap

needed there. Suggestion: connect to South West Rocks

Kinchela is used for emergency supply only (eg in drought conditions, major mains

break) pumps cause mains repairs

SM Dam is off line seasonally – Christmas time can be off for 2 months or 2 weeks

Todd noticed that at the Dam, when they turned aeration function off, taste & odour

went



Sherwood Water Treatment Plant pH is corrected by lime & gas chlorine then up to

Greenhills Reservoir – flow paced

Identify customers off main after being injected

Only 1 customer off bore line after bore field but before the Sherwood Lime Plant &

valve interconnections (raw water customer) believed to be a connection to a cattle

trough

Extra booster pump

Gravity fed over to Potters Hill Reservoir from Greenhills Reservoir – mains are

located under the railway bridge structure need replacing. Options for consideration

are under bore (biggest risk) or build a new bridge

Instrument calibration

General comments:

Reviewed & discussed Graphs provided by Jillian on treated water levels

for the following:

1. Lead

2. Iron – shows as dirty water complaints

3. Aluminium

4. Copper

5. Manganese – shows as dirty water complaints. Stirs up when mains break

repairs or flushing occurs

6. pH – dosing controls. Higher pH peaks shown are at Dam, Lower pH is at

Reservoir. Optimum range is in between 6.5 and 8.5

7. Turbidity – highest peak was at May 2009 flood event

8. Microbial indicator level total Coliforms (02/07/06 to 23/12/11) from 3

selected Retic sites: KS01121, KS01234, KS01456 - failures are

normally with good Cl2 res. KS01456 had an issue last week in April

2012. KSC has had no Ecoli failures to date.

9. Kempsey rainfall from weather station 59017 – not the catchment area

(29/10/06 to 29/10/11)

Water has been sourced from SM Dam for most of this year to date

Reservoir – turn over bank erosion

Had an issue with unreliable couriers where samples were not getting to the lab on

time for testing

Check chlorine at site, resamples at next weeks’ samples

Kerryn from NSW Public Health to check and advise if it is possible to change to

using peak bottles instead of wide neck bottles

Reviewed & discussed Graphs provided by Jillian for the following:

1. Aphanocapsa – Blue Algae at SM Dam

2. Cyanonephron – Blue Green Algae Species

3. Anabaena - Cell Count

2001 – 2002 KSC cleaned 8000 metres clogged by Green Algae (Easter was the

main taste & odour event)



CRITICAL CONTROL POINT PROCEEDURES

Water Supply System Kempsey & Lower Macleay

CCP ID KLM 1

What is the control point? Bore Water Extraction

What are the hazards? All Pathogens

What is being monitored? Turbidity

Where is it being measured? Continuous online turbidity monitoring at Sherwood Lime Plant and manual test of raw water at SM Dam inlet race

Frequency of testing. Online daily, Manual test 3 times / week

Responsibility Operator Water Process

Target <1 NTU

Alert Level >2 NTU

Critical Limit >5 NTU

Monitoring Systems

Observe weather and flood warnings

Conduct routine Bore maintenance program to ensure bore casing intact & bore pump functioning is suitable

Monitor and measure raw water turbidity

Visual checks on incoming water to Steuart McIntyre Dam Inlet Race.

Equipment checks


Corrective actions

Check recharge channel for any water quality impacts, such as flooding

Check bore field for signs of damage to bore or any impacts to sites areas around bores

Investigate operating bores in use at time of sampling to identify source of increased Tb levels

Contact TO

Make arrangements for isolation & repairs to problem bore

Corrective actions

Cease Bore water extraction

Contact TO (WPTO)

Follow all Adjustment Limit steps

TO to inform Water Process Manager.

Manager to contact PHU

Management to consider the need to initiate an incident response.

Complete Incident Notification Form*

*Incident Notification Form still to be developed




CCP ID KLM 2

What is the control point? Steuart McIntyre Dam Water Extraction


What is being monitored? Turbidity

Where is it being measured? Manual test on SM Dam outlet

Frequency of testing. Daily


Target <1 NTU

Alert Level >2 NTU

Critical Limit >5 NTU

Monitoring Systems

Maintain dam at approximately 53m AHD (96% level) when possible.

Observe weather warnings

Weekly shore line monitoring for points of erosion (boat and vehicle)

Routine testing

Routine monitoring including compressor run times

Aeration system to be run for 6 hours during night to mix water body


Record on electronic spreadsheets

Corrective actions

Contact TO

Increase shore line and downwind surface observations

Check online temperature trends to determine if dam has inverted

Increase monitoring from different levels of offtakes.

Select the most suitable offtake level

Identify source of elevated turbidity and if not found, check aeration line for correct operation

Adjust aeration system operational times

Increase algae monitoring if algae detected

Adjust disinfection levels at treatment site.

Check Sherwood Lime plant to make sure it will run if needed

Record actions taken on electronic spreadsheets

Corrective actions

Contact TO




Management to consider starting Sherwood Lime Plant (alternative supply).


Continue to monitor Dam when alternative water source is in use.





CCP ID KLM 3

What is the control point? Steuart McIntyre Dam Water Extraction

What are the hazards? Taste and Odour Compounds, Algae Toxins

What is being monitored? Algae Counts

Where is it being measured? Manual sampling and analysis of Dam profile – MIB, Geosmin and Algae Biovolume

Frequency of testing. Monthly to weekly – refer to “KSC BGA Notification and Response Procedure”


Target No No Detected T&O or Algae biovolume

below detection limit

Alert Level

Noticeable T& O or Algae biovolume at alert level 1

Critical Limit

MIB/Geosmin > 10 ug/L or Algae biovolume at alert level 2

Monitoring Systems

Maintain dam at approximately 53m AHD (96% level) when possible.

Observe weather warnings

Weekly shore line monitoring for points of erosion (boat and vehicle)

Routine testing

Routine monitoring including compressor run times

Aeration system to be run for 6 hours during night to mix water body


Record on electronic spreadsheets

Corrective actions Contact TO

Increase shore line and downwind surface

observations

Start in-house T&O testing of boiled water by operational staff

Consider reviewing the aeration operation rates in consultation with the Laboratory.

Consider benthic algae inspection and sampling

Increase visual monitoring for the formation of surface scum

Select the most suitable offtake level

Adjust aeration system operational times

TO to refer to “KSC BGA Notification and Response Procedure”.

Check Sherwood Lime plant to make sure it will run if needed

Record actions taken on electronic spreadsheets

Corrective actions

Contact TO




Management to consider starting Sherwood Lime Plant (alternative supply).


Continue to monitor Dam, as per “KSC BGA Notification and Response Procedure” when alternative water source is in use.





CCP ID KLM 4

What is the control point? Disinfection


What is being monitored? Free Chlorine Residual

Where is it being measured? Manual sampling at Reservoirs – Greenhill, John Lane and Potters Hill Reservoirs



Target 1.4 mg/L

Alert Level 1.0 mg/L

Critical Limit 0.8 mg/L

Monitoring Systems

Routine site and equipment checks at Steuart McIntyre Dam WTP/ SLP

Dosing rate checks

Disinfection residual checks performed at the outlet of Reservoirs


Record on calibration and electronic spreadsheets

Corrective actions

Perform top up dosing to maintain adequate residuals or scour and turnover supply if levels are high (Refer to Chlorine SOP)*

Contact TO

Check integrity of Reservoirs for any breaches or unauthorised access

Check primary dosing equipment and hypo concentration

Check disinfection levels from primary dosing and adjust as required

Check raw water (SMD or Bores) conditions

Detailed system inspection and increased monitoring from key locations

Sampling and flushing in the distribution network as necessary

Corrective actions

Contact TO





Management consider implementation of Incident Plan of Action – refer to Emergency and Incident Management Plan (eg boil water alert)

*Incident Notification Form & Chlorine SOP still to be developed




CCP ID KLM 5

What is the control point? Reservoirs

What are the hazards? All Pathogens and All Chemicals

What is being monitored? Reservoir Integrity

Where is it being measured? At Reservoirs

Frequency of testing. Monthly Visual Inspection


Target No breach of reservoir integrity

Alert Level Any sign of integrity breach

Critical Limit Evidence of contamination

Monitoring Systems

Visual inspection routine

Vermin inspection checklist

Scheduled Contractor cleaning

Corrective actions

Visual inspection (outside/inside)

Check chlorine residual

Dose chlorine to reservoir and/or increase dose at plant, if needed (refer to chlorine SOP)*

Contact TO

Repair breach of integrity

Increase inspections until repaired

Record actions in electronic spreadsheets

Corrective actions

Follow AL corrective actions

Take micro-sample

Remove contaminants, if safe to do so

Inform TO

TO to contact manager

TO to complete an KSC Incident Report if necessary (damage to property)




*Incident Notification Form & Chlorine SOP still to be developed




CCP ID KLM 6

What is the control point? Distribution


What is being monitored? Free Chlorine

Where is it being measured? Manual testing at designated monitoring sites in distribution system



Target > 0.3 mg/L

Alert Level < 0.2 mg/L

Critical Limit </= 0.1 mg/L

Monitoring Systems

Calibration of instruments

Routine monitoring program

Scheduled mains cleaning

Corrective actions

One additional samples to confirm results, if first 2 results differ, take a 3rd sample

Test additional sample points within the distribution system for similar results

Confirm chlorine residual at reservoir is correct

Visual inspection of reservoir (refer to Reservoir SOP & chlorine SOP)*

If chlorine residual is correct flush affected mains

If not obvious sign of contamination at reservoir check chlorine dose at plant

Contact TO

Corrective actions

Contact TO

TO to inform Manager Water Process

Manager to call PHU

Follow AL steps

Visual inspection of mains



*Incident Notification Form, Reservoir SOP & Chlorine SOP still to be developed



KEMPSEY LOWER MACLEAY RISK ASSESSMENT REGISTRY

CATCHMENT

Initial Risk Residual Risk

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nt Outstanding Actions

Kem C1 Macleay Rv Catchment

Pathogens from rural residential and agricultural runoff.

Pathogens (Chlorine resistant e.g. Crypto)

C 3 High D 3 Moderate Physical removal by aquifer. Septic tank inspections by Council. Residence time in river and alluvium.

< 0.5 ppm Cl

Bellbrook Online River turbidity monitoring

MWP TBD Reports from High risk septic tank assessments and remedial works required. TBD event sampling program

not all catchment interactions are within Councils control.

Introduce a Community education program to raise awareness of the need to minimise pollution to water bodies. Develop a map of high risk septic tank locations within the catchment for review by SDS (Sustainable Development Services) for integration into their Septic Tank monitoring program. Develop a GIS layer identifying high priority risk zones within catchment. Establish MOU with adjacent land holders on WQ protection zones. Develop and implement a catchment risk program to identify pathogens of concern in conjunction with NSW Health

Kem C2 Macleay Rv Catchment

Pathogens from rural residential and agricultural runoff.

Pathogens Chlorine sensitive e.g. Bacteria and viruses

C 3 High D 3 Moderate Physical removal by aquifer. Septic Tank inspections by Council. Residence time in river and alluvium. Chlorination disinfection at treatment stage.

Bellbrook Online River turbidity monitoring

WP TBD Reports from High risk septic tank assessments and remedial works required. TBD event sampling program

Past bore monitoring has indicated low or nil micro indicator levels.

Introduce a flood event sampling project to understand the pathogen load levels. Introduce a Community education program to raise awareness of the need to minimise pollution to water bodies. Develop and implement a catchment risk program to identify pathogens of concern in conjunction with NSW Health.

Kem C3 Chemicals from agricultural runoff or incident (farm spill or accidents on catchment roads) causing WQ issues.

Chemical (nutrients and pesticides)

C 2 Moderate C 2 Moderate Physical removal by aquifer. Land holders agricultural chemical management actions. Removal by vegetated buffer zones.

Nutrient levels on dam inlet and dam water. Pesticide survey on bores.

WP Past monitoring indicates below ADWG and laboratory detectable levels

Water treatment plant installation. Establish MoU with adjacent land holders on WQ protection zones. Establish notification with emergency services for traffic incidents impacting on water ways. Signage on major upstream roads and river crossings.




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Kem C4 Macleay River catchment and Recharge Channel

WQ impacts due to past mining activities in catchment.

Physical, Chemical (Arsenic & Antinomy) and Turbidity.

C 3 High D 3 Moderate Macleay River Working group monitoring mining activities. Ongoing monitoring of Antinomy levels dispersal rates. EPA licencing on mining activity. Notification of spills.

12 month heavy metals monitoring progran with NSW Health on Raw water at Bellbrook. Monthly Heavy Metals montiroring of Drinking water at Willawarrin

WP Antinomy & Arsenic contamination of sediments within river are known to be above ADWG levels. Current monitoring has not detected any levels of Antinomy or Aresnic above ADWG, downstream of Bellbrook.

Include Antinomy and Arsenic in river and bore monitoring during event sampling


Rainfall following a bushfire impact within the catchment.

Physical & Chemical (e.g. Fire Retardant).

C 3 High D 3 Moderate Natural filtration by aquifer. Choosing alternative or emergency supply.

Visual monitoring. Bellbrook Online River turbidity monitoring

WP Establish a notification and response protocol with landholders and emergency services.


Nutrient run off from land activity.

Nutrients causing Algal bloom in Dam.

D 3 Moderate D 1 Low Physical removal by aquifer. Choose alternative supply

Continue to support CMA land improvement projects in the river buffer zones.


Storm events and flooding leading to elevated turbidity levels.

Turbidity A 4 Very High D 2 Low Physical removal by aquifer. Cease bore pump extraction.

Rainfall is routinely monitored in the catchment and flood warnings are received by Council.

WP SOP for Bore isolation TBD.

Bore head is above flood heights and is not inundated.

KSC to prepare a flood response protocol for the protection of the water supply.


Chemical Spill from traffic access areas.

Chemicals (various)

D 5 Very High D 2 Low Cease bore pump extraction

Monitoring of bores and recharge channel.

SOP for Bore isolation TBD.

The recharge channel does not have an isolation valve on the inlet structure.

Emergency Response notification required from emergency services.Emergency Management Plan to be updated to include catchments incidents. Catchment signage on major road crossings



BORES


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Kem B1 Aquifer and Borefield

Chemicals from agricultural runoff near bores of recharge channel causing WQ issues.

Chemical (pesticides)

D 3 Moderate D 3 Moderate Land holders agricultural chemical management actions. Bore head protection.

< 0.5 ppm Cl

Reticulation monitoring at local community.

MWP Distribution monitoring in 2012 did not identified detectable levels above ADWG limits. Pesticide monitoring project conducted has not identified any detectable levels.

Bore exclusion arrangements to be developed with local landholders. Introduce MoU with local landholders for land management practices around Bores. Aim to purchase land when local areas are for sale.


Pathogens from rural residential and agricultural inputs due to surface water ingress.

Pathogens (Chlorine resistant e.g. Crypto)

C 3 High D 3 Moderate Physical removal by aquifer. Septic Tank inspections by Council. Residence time in river and alluvium. Bore head protection.

5 NTU Project sample when required. On Line monitoring of turbidity on raw water and nutrients (TN & TP) monitored at SMD inlet.

WP Fencing around bore pumps to restrict animal access. Bore inspection and preventative maintenance program to be initiated.


Pathogens from rural residential and agricultural inputs due to surface water ingress.

Pathogens (Chlorine sensitive e.g. Bacteria and viruses ) Nutrients

C 3 High D 3 Moderate Physical removal by aquifer. Septic Tank inspections by Council. Residence time in river and alluvium. Chlorination disinfection at treatment stage.

5 NTU On Line monitoring of turbidity on raw water and nutrients (TN & TP) monitored at SMD inlet..

WP Flood impact monitoring has not been conducted.

Fencing around bore pumps to restrict animal access. Bore inspection and preventative maintenance program. KSC to prepare a flood response protocol for the protection of the water supply. Introduce a monitoring project to determine Pathogen loads within each Bore.


Short-circuiting of contaminants through to bores due to well casing failure.

Pathogens Turbidity

D 4 High E 4 High Bore rotation and selection.

5 NTU Monitoring of Bore function and WQ levels. On Line monitoring of turbidity on raw water and nutrients (TN & TP) monitored at SMD inlet.

Rotation of bores currently determined by maintenance and repair issues and not WQ concerns.

Introduce a bore inspection and preventative maintenance program.




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Groundwater can contain parameters that naturally occur in the geology and can mobilise in the water supply.

Chemicals (Fe & Mn) Radiological

B 2 High D 2 Low Aquifer monitoring program. Radiological assessment from communities. Downstream chlorination and settling opportunity in SMD.

Radiological parameters monitored at Burnt Bridge community and Greenhill reticulation.

Past monitoring programs have not detected abnormal levels.

Initiate monitoring during event periods (Dry and Flood) for each supply bore including Arsenic and Antimony.



STEUART MCINTYRE DAM


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Kem DM1 SM Dam Nutrient levels leading to algal blooms.

BGA toxins Taste and Odour Suspended Solids

B 4 Very High D 2 Low Visual and Algae cell count monitoring of Dam surface and various off takes levels. Aeration system installed. EPA licence for Alum dosing if required. Choice of alternative supply.

>10 ug/L Geosmin/MIB

Site inspections. BGA monitoring conducted from various off take levels (5 of) Operational staff conduct in-house T&O testing.

WP NSW Health Alert level Framework KSC SMDam Management Plan.

No removal or control of algae toxins or T&O compounds at the WTP. Blooms occur regularly in the summer months. Nutrient levels are relatively low

Need to update the SMDam Management Plan Alert Level Framework to include Bio volumes as well as cell numbers notification, and T&O alert levels. Operational weekly task list to be prepared to include Algae monitoring. Regular maintenance needs to be programed for the off take gates.

Kem DM2 SM Dam Pathogens from faecal inputs reaching the abstraction point from dam.

Pathogens (Chorine sensitive and resistant).

C 4 Very High C 2 Moderate Choice of off-take levels. Chlorination at treatment.

< 0.5 ppm Cl MWP Project monitoring results for pathogens etc. Routine Operational Monitoring site list TBD.

No history of pathogen loads from reservoir.

Initiation of a monitoring program for pathogens on take-off point of SMD.

Kem DM3 SM Dam Storm event resulting in an increased level of turbidity and suspended solids in the SMD.

Suspended Solids & Tb

A 3 Very High D 3 Moderate Daily monitoring of Tb at final water point in WTP. Revegetation program for erosion control on embankment. Increase disinfection dosing. Change to alternative supply.

5 NTU Temp, DO and pH monitoring at various off take levels.

WP SOP for Routine Dam monitoring TBD. SOP for Storm event monitoring TBD.

No treatment at WTP (Coag/Floc or Filtration) to manage increased Tb levels. No online Turbidity at outlet.

Regular operational monitoring for Tb to be initiated at WTP. Additional monitoring to be conducted after storm events. Increase the capacity of buffer zones around SMD to reduce sediment and nutrient loads during wind and rainfall events. Increase the WTP functionality and capacity to control elevated Tb levels. Include the selection of off takes into the SMD Operational Procedure.

Kem DM4 SM Dam Dam turnover leading to WQ issues.

Mn, Fe, Tb, T&O and pH changes.

A 3 Very High D 1 Low Aeration system installed. Operator visual inspections on a weekly basis. Alternative supply if needed.

Temp, DO and pH monitoring at various off take levels.

WP SOP for Aeration System Mgt TBD

Aeration line annually inspected by divers.

Blower run hours and operation inspection to be included in operator site procedure. Routine maintenance schedule for blowers to be developed.

Kem DM5 SM Dam Bushfire impact to catchment leading to increased particulate matter in SMD.

Physical (Turbidity)

B 4 Very High D 1 Low Choosing lower off take level or change to alternative supply.

Tb >2NTU Visual and surface monitoring

WP TBD and included in Emergency Response Plan.

Develop a procedure for selecting emergency response for water supply source control. Review and update the SMD Bushfire prevention plan.

Kem DM6 SM Dam Contamination of the SMD from dead animals in water.

Pathogens C 2 Moderate C 1 Low Regular land/water patrols conducted to inspect and remove dead animals/debris.

Operational site visits

WP Site Mgt Procedure TBD.

Kangaroos have in the past been forced into dam by wild dog attacks.

Introduce an 'animal control' program in the secured catchment area. Inspections to be included in site management procedure.




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Kem DM7 SM Dam Access by native and feral animals to the SMD introducing faecal contamination and disturbances of shore lines.

Pathogens Turbidity

A 2 High C 1 Low Site surveillance and alternate day perimeter checked by operators. Chlorination of water supply


WP Site Mgt Procedure TBD.

Open reservoir with a secure boundary fence. Small catchment area.

To monitor animal numbers and introduce an 'Animal control' program when required.

Kem DM8 SM Dam Malicious contamination

Various D 3 Moderate E 2 Low Dilution. No public access allowed to site. Security checks conducted.


WP SMD Site Mgt Procedure TBD.

Site gates always locked to site. Consider the installation of CCTV at tower bridge to observe vandals and vermin activity.



STEUART MCINTYRE DAM WATER TREATMENT PLANT & SHERWOOD LIME PLANT


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Kem TSH1 Sherwood Lime Plant

Under dosing (e.g. from error, equipment failure or running out ) of Chlorine Gas resulting in inadequate disinfection to control pathogens.

Pathogens (Chlorine sensitive)

A 4 Very High

D 3 Moderate Daily operator checks of Cl2 levels at WTP outlet, and Green Hill Reservoir. 'Top up' chlorine dosing at reservoirs if needed.

<0.5 ppm FAC at Greenhill Res

Disinfection levels WTP and Reservoirs.

WP Sherwood WTP Site Management Procedure TBD. NSW Public Health response for unsafe drinking water.

Duty standby on Chlorine gas dosing

Online analyser needs to be installed at Sherwood WTP to measure and control chlorine dosing. Require the installation of Chlorine dosing interlocks with Bore pumps. Chlorine gas scales to be installed to monitor gas usage. Maintenance isolation process requires 'permit to work' approval system for all maintenance needs at key dosing sites.


Overdosing of Chlorine leading to high levels in supplied water.

T &O, Chlorine, DBP's.

C 3 High C 3 High Daily operator checks. Reservoir chlorine monitoring. Regular scheduled maintenance of gas dosing system.

< 0.5 ppm Cl

Chlorine levels at reserviors

MWP Incident response procedure TBD

Online monitoring to be installed at WTP & Greenhill Reservoir to measure and control chlorine gas dosing. Chlorine gas cylinder scales need to be installed and connected SCADA for remote monitoring.


Under dosing of Lime

Low pH C 1 Low C 1 Low Daily operator checks Reservoir pH monitoring

<6.5 pH pH levels at Reservoirs

WP Site Management Procedure

In the past the lime hopper has had operational problems

Critical supplies to be sourced for Lime doing system. Weekly cleaning of Lime dosing system pipe work.


Overdosing of Lime creating operational issues.

High pH D 2 Low D 2 Low Daily operator site checks. Reservoir pH monitoring.

> 9.0 pH pH levels at Reservoirs Lime storage level

WP Sherwood WTP Site Management Procedure TBD.

Lime settles out in Green Hill Reservoir creating cleaning issues.

Install online pH monitoring after treatment.

Kem TSM1 Steuart MacIntyre Dam WTP

Under dosing (incl- error, equipment failure or running out ) of Hypo resulting in inadequate disinfection to control pathogens.

Pathogens (Chlorine sensitive)

A 4 Very High

D 3 Moderate Daily operator checks of Cl2 levels at WTP outlet, and Green Hill Reservoir. 'Top up' dosing at reservoirs if needed.

<0.5 ppm FAC at Reservoirs


WP SMD WTP Site Management Procedure TBD

Hypo dosing interlocks have been established with the 3 transfer pumps.

Online analyser needs to be installed at SMD WTP to measure and control chlorine dosing. Alarms to be installed on Hypo dosing pumps. Installation of automated duty standby dosing pumps. Maintenance isolation process requires 'permit to work' approval system for all maintenance needs at key dosing sites. Upgrade of Disinfection system


Overdosing of Sodium Hypochlorite leading to high levels in supplied water.

Chemical (Chlorine & DBP)

C 3 High C 3 High Daily operator checks. Reservoir chlorine monitoring. Regular scheduled maintenance of Hypo dosing system.

>3.0 ppm Chlorine levels at WTP and Reservoirs.

WP Incident response procedure TBD.

Online analyser and dosing to be installed at SMD WTP/Green Hill Reservoir to measure and control sodium hypochlorite dosing.




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Run out of chemicals resulting in the supply of non disinfected water.

Pathogens D 5 Very High

E 1 Low Operational staff record Hypo levels and replenish supply in a timely manner. Chlorine monitoring at Reservoirs.

Hypo Tank level

WP Site Management Procedure TBD

Chemical supplier is reliable for supply of stock

A Chemical stocktake system is required. Critical low level indicator and mark to be placed on Hypo storage tank, and connected to an alarm.

Kem T1 Steuart MacIntyre Dam WTP & Sherwood Lime Plant

Non authorised persons accessing the site and interrupting the treatment processes (e.g.. Vandalism, trespassing)

Various C 4 Very High

D 4 High Daily operational site visit.

Site security. WP Back to base alarm system required. Secure compound required for Lime shed at Sherwood WTP. Improve communications between KSC business units for prior notification for contractor works programed. Training of all staff on the prior notification of works programed and site visiting requirements - access permit introduction.


Loss of power at treatment plants due to storm events or planned outages resulting in loss of treatment control.

Various C 3 High C 3 High Reservoir storage volumes maintain supply.Interlocks on PLC to cease disinfection dosing if pumps start after power outage.Essential Energy contacted to determine outage duration.

6 Hours outage

Distribution storage Reservoir levels monitored

WP TBD Emergency Response plan

Generators were considered but due to the size required - it would an unrealistic requirement

Investigate the possibility of emergency power sources to supply dosing and transfer pumps at major reservoirs.


Incorrect concentration or type of chemical delivered to site.


D 4 High Trained operational staff attend sites. Reliable chemical supply company used.


WP Chemical Delivery Site check list TBD. Emergency Response Procedures TBD.

Chemical supplier is reliable for supply of stock

Council to implement a Chemical Supply contract with QA for quality of product. All deliveries to have an operator attend site at time of delivery, and conduct a Chemical Delivery Site check list.



RESERVOIRS


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Kem R1 Reservoir Ingress of faecal material from vermin entry.

Pathogens C 4 Very High

C 2 Moderate Reservoir clean and inspection program. Monthly inspections performed by Operational staff Disinfection levels maintained to control chlorine sensitive pathogens.

< 0.5 ppm Cl Monthly inspection checklist. Contractor inspection and reservoir cleaning program.

MWP Reservoir Maintenance Schedule and checksheets

Tanks except for John Lane have been secured around hatch area.

Greenhill has bird activity and entry around the level indicator pulley. Potters Hill has had mesh displaced by electrical maintenance staff, under the platform hatch. Formalise actions identified from inspection program. Identify electronic document pathway for storing reports

Kem R2 Reservoir Malicious contamination or access to reservoir by unauthorised personnel leading to water contamination.


C 2 Moderate Access areas are secured. Hatches are locked. Operational site inspections conducted regularly. Clean and inspection program every 2-4yrs

Evidence of unauthorised site access.

Regular site visit conducted by operators. Monthly operational inspection checklist. Aqualift inspection and reservoir cleaning program.

WP TRIM Some tank sites do not have a secure compound fence. Graffiti is on tank walls but unlikely access to roof area.

Secure compounds required for John Lane (vandalised), Potters Hill, and prioritise the upgrade of the external ladder access for all reservoirs. Action the identified priorties from the external contractors reports on the reservoirs.

Kem R3 Reservoir Damage due to storm events resulting in WQ contamination e.g. roof sheeting damage, gutters blocking and back flowing into tank.

Pathogens C 3 High C 2 Moderate Access areas are secured. Hatches are locked Operational site inspections conducted regularly. Disinfection levels maintained in Reservoirs. Contractor inspection program every 2-4yrs

Visible damage < 0.5ppm Cl

Monthly inspection checklist. Aqualift inspection and reservoir cleaning program.

WP Tank Inspection Procedure to include inspections after storm event.

Kem R4 Reservoir Disturbance of sediments due to low volumes and then refilling.

Turbidity Taste and Odour Pathogens

B 3 High E 2 Low Reservoirs are maintained at >70% capacity . Certified diver cleaning program for all reservoirs. Operational monitoring at sites.

Tb <2 NTU Turbidity levels on outlet of Reservoirs. Customer complaints. Diver inspection report.

WP Reservoir cleaning program TBD Addition of critical limits on field monitoring sheets.

Lime build up in Greenhill Res when Sherwood WTP is on line

Modification of inlet/outlets or installation of diversion plates to prevent sediment disturbance.

Kem R5 Reservoir High Cl2 levels due to failure in control at treatment or error during top up dosing.

Taste and Odour Disinfection by-products formation.

B 2 High C 2 Moderate Trained operators monitoring Chlorine levels. Investigate and rectify the cause.

> 2.2 ppm Cl2

Cl2 levels & pH WP Field results sheets TBD Chlorine 'top up dosing 'procedure.

Only some reservoirs require top up dosing. Human error.

Dosage sheets at Reservoirs for low reads needs updating to include dosing regime. Online monitoring and alarms for disinfection residual at Reservoirs. SOP to be developed for chlorine slug dosing




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Kem R6 Reservoir Low Cl2 levels resulting in potential for WQ failure.

Pathogens B 4 Very High

C 3 High Daily inspections of reservoirs & monitoring of chlorine levels. Top up dosing conducted if levels below limit.

< 0.5ppm Cl2 on outlet.

Daily Cl2 and pH checks on outlets.

WP TBD SOP for tank top up dosing

Old pipes/long distribution. Introduce online monitoring and secondary dosing on key sites. Interlock control placed on primary disinfection system. Top up dosing procedures for all reservoirs available on sites. Clybucca Res to have a motorised valve installed to improve water level turnover.

Kem R7 Reservoir Stagnation of water Elevated pH Taste & Odour Potential Pathogens

A 3 Very High

A 3 Very High Water height adjustable for some reservoirs Inlet and outlets are not common.

Cl2 < 0.5 ppm pH >8.6

Chlorine & pH levels

WP TBD SOP for Reservoir Operations

Low turnover in Clybucca Reservoir as there is no control valve that can adjust levels -which could impact on BP service station and rural connections

To adjust fill cycle in John Lane as it has suspended sediments on wall. Quality control tests prior to top up dosing. Motorised valve installed at Clybucca to encourage water turnover. Flow meter monitoring on outlet of reservoirs. Installation of directional nozzles/mixers in the Reservoirs. Propose a water carter fill station installation at Clybucca to encourage turnover of reservoir.

Kem R8 Reservoir Introduction of contaminates due to maintenance staff and or telecommunications contactors.

PathogensVarious B 4 Very High

D 3 Moderate Suitably inducted contractors and staff allowed to work on site. Reviews to be conducted after all site works. Operational site inspections conducted regularly. Chlorine residual maintained in reservoir

0 Ecoli Distribution Microbiological Testing

WP TBD Site induction. Contactor Safety and WQ Induction.

There is past history of 'other' maintenance staff exposing the reservoir to contamination points during and post installation and repair work.

To formulate a Safety and WQ induction program for all contract staff that have access to water supply facilities.Conduct in house training for maintenance staff on WQ protection.

Kem R9 Reservoir Loss of water levels that maintain pressure requirements in the distribution.

Pathogens, Turbidity

B 4 Very High

C 3 High Maintain optimal operating water levels for distribution. Monitoring reservoir level trends. SCADA alarms

Individual levels set for each Res.

Reservoir water levels

WP TBD SOP for Reservoir Operations

All reservoirs have low level alarms, however as Clybucca Reservoir has no power or instrumentation, there is no real level monitored and hence no low level alarm would be activated

Review the alarm levels set for individual reservoirs. Include SOP for alternative or emergency supplies or water restriction implementation. Include procedure for taking Greenhill Res offline. Upgrade telemetry at reservoir sites. Include drawing of Reservoirs in ASAM.



DISTRIBUTION


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Kem D1 Distribution Ingress of contaminates by back flow or cross connections (including illegal connections)

Various B 4 Very High

B 5 Very High

Positive pressure maintained in the system. Dual check meters in use. Meter replacement program.

Reservoir levels and Distribution pressure.

MWO High Risk register of connections.

Follow industry codes for BF prevention. New and retrofitting of high installations and building approvals to be inspected and rated.

KSC to enforce a regular back flow inspection and maintenance program based on priority and risk. To maintain a register of high risk connections. Council need to ensure compliance to plumbing codes.

Kem D2 Distribution Mains breaks or unsanitary repairs leading to WQ issues including cross contamination of main repair equipment e.g.. Sewer/Water

Pathogens Turbidity Taste & Odour

B 4 Very High

D 4 High Flushing of main after repair. Training of staff. Asset identification and Mains Replacement program.

Distribution Cl2 Micro and Tb levels

MWO TBD SOP for Mains repairs and recommissioning. Condition rating of mains to be included in Work Order Action Sheet

Currently operational staff can work on both sewer or water infrastructure with same equipment. Pipes and fittings are stored at STP.

Work crews require separate repair equipment and clothing. Wash down and disinfection procedures TBD for equipment that can not be duplicated. Storage of materials to be improved to prevent vermin, debris and contamination. Re-chlorination program for repaired mains TBD. Water Process Oeprators to measure disinfection levels after repair work. Training for staff on Work Order Action sheet identifying the condition rating of the main. Main breaks information layer to be placed on MapInfo. Civicview needs to be updated on new mains installed for the last 10 years.

Kem D3 Distribution Loss of pressure in main due to pressure pump failure


C 4 Very High

C 3 High Customers informed of proposed power outages. Duty standby pump if available. For all situations in the Kempsey system a positive pressure is maintained by gravity head of the supply reservoir for these pressure boosted areas.

Cl2 residuals, pH & Tb conducted week days

MWO & MWP

Routine Maintenance program TBD for booster pump stations.

Burnt Bridge area has mains pressurised by an electric circulation pump impacting approx. 100 customers. Everinghams Lane area.

Alternative power to be installed for power outages or investigate alternative water supplies (i.e. tank on tower). Initiate routine maintenance program for pressure pump and store information in asset register. Prioritise booster pump station supply areas for backflow prevention reviews.

Kem D4 Distribution Sloughing of biofilm leading to WQ complaints caused by e.g. reverse flow.

Dirty water, Tb, Taste & Odour

B 3 High B 3 High Operational knowledge of distribution system. Maintaining disinfection levels to control biofilm. Water carters dedicated filling stations.

< 0.5 ppm Cl

Cl2 residuals, pH & Tb

MWP SOP for Mains repair TBD. WQ complaints procedure TBD

No coordinated flushing program currently in place. Customer complaints initiate a flushing program.

KSC Valve ID Program to be initiated. Control biofilm levels by a regular mains cleaning program. Review dead end locations and look to develop flushing program or link to system to remove dead ends.Review customer complaints to identify dirty main areas. Maintenance staff to be trained on valve operation and flushing after repairs




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Kem D5 Distribution Incorrect valve operation or valve failures leading to ingress of contaminates due to loss of pressure.

Pathogens, Taste and Odour, Tb

C 3 High C 3 High Training of operational staff. Works Order Action sheet identifies maintenance requirements. Positive pressure maintained.

Cl2 residuals, pH & Tb

MWO TBD Valve Check sheet

Valves are not physically labelled. LH & RH valves within the system. Relies on operators systems knowledge.

KSC to initiate a valve maintenance program and onsite identification. Implementation of a valving 'Check Sheet' with tagging system for staff. Council policy to include acquisition of RH closing valves to be standardised. MapInfo layer to include valve orientation information. Work Order Action sheet to be modified to include valve maintenance issues identified.

Kem D6 Distribution Dead ends in reticulation leading to stagnation and WQ issues.

Taste and Odour High pH, Pathogens.

B 3 High B 3 High Flushing program when requested.

Customer complaints. pH & Micro test results

WTO TBD Routine flushing sites identified.

Customer complaints initiate a flushing program. New main designs are as per WSSA to prevent dead ends.

Problem areas to be placed on routine flushing programs. Link mains. No dead ends in new developments. Identify and list sites for Mains Replacement program.

Kem D7 Distribution Water carters contaminating the supply through back flow.


C 4 Very High

E 2 Low Use of approved water carters that fill from filling stations only.

Water carter licence review by Strategy Team

MWS Water carter fill stations installed in system. Registration through council with an induction and penalties system.

Look at a notification procedure to inform carters if there is a main breaks or supply issue for fill stations (4 fill stations for all of KSC). SDS to inform WQ of auditing of carters.

Kem D8 Distribution Use of fire hydrants disturbing sediments in system and causing WQ incidents.

Sediment C 3 High D 2 Low Training of staff on use of hydrants. Water carters fill from designated filling stations. Minimal use of fire hydrants or stand pipes in reticulation. Hydrant stop valve replacement program.

MWP TBD Flushing sites and procedure.

The main cleaning program initiated to reduce sediment loads. NSW Fire and Rescue, & Rural Fire services to be requested to give prior notification to KSC of any practice exercises that will use a hydrant service.

Kem D9 Distribution Unsanitary commissioning of a new main.

PathogensTurbidityTaste & Odour

C 4 Very High

c 4 Very High

New mains flushed before connection.

MWO TBD Procedure for the connection of new mains including inspection and disinfection.

Currently there is a minimal requirement to flush mains before connections with minimal supervision.

All new mains to be inspected and have a disinfection program and verification by water process operators before connection.



WHOLE OF SUPPLY


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Kem W1 Whole of System

Loss of trained operators

Various C 3 High D 1 Low Trainee and School based training scheme have been initiated. In-house & external training. Council recruitment program.

< 0.5 ppm Cl

Staff survey and performance reviews

MWP Vacancies are usually filled quickly. A new salary scheme is yet to be implemented if requested. Exit interviews are conducted for leaving staff if.

To have an encouraging and supportive work environment. To prepare a succession planning process and implement the proposed new salary scheme.


Non qualified contactors working on sites


C 3 High To have appropriately trained and competent contractors on a preferred supply list. Supervision of contractors on site.

Review qualification, SWMS and insurances.

KSC Procurement officer & WP

WQ & OH&S induction TBD

Working Contactors have been unsupervised on site in the past, mainly due to lack of prior notification being received by operational staff.

Council to have a list of preferred providers. WQ & OH&S induction for all contractors that work on water supply sites. Improve communications between KSC business units for prior notification for contractor works programed.


Consumers on rising main receiving variable quality water

High Cl2 Sediments

B 3 High B 3 High No controls in place. Complaint based

MWS WBA document to be prepared

Relevant to 4 services on the Potters Hill main from the SMDam. Water supplied can be highly chlorinated when SMD supply or low chlorination when on alternative supply.

Introduce a 'water by agreement' (WBA) to customers on rising main that the WQ may be variable for drinking (highly chlorinated). Annual notification sent to customers reminding them of the WBA.


Delays in alarms from Radtel and SCADA

Various A 4 Very High

C 3 High Operational staff check on-site alarms and Radtel

MWP & MWO

Mobile service coverage and delivery of alarms is problematic. RTU's are undersized for adequate alarm delivery.

Upgrade the telemetry and SCADA system On call staff to regularly check Radtel and SCADA for system alarms.


Lack of emergency response procedure


B 3 High Appropriately trained staff that have the ability to act and respond to incidents.

MWP Incident & Emergency Response Plan to be developed

Past response to WQ incidents have been resolved by reactive measures rather than to a plan.

Incident & Emergency Response Plan to be developed which includes communication, responses and reporting requirements. Appropriate training for all staff.


Failure of telemetry monitoring


A 2 High Manual monitoring Routine maintenance of telemetry systems.

MWP & MWO

To upgrade the telemetry system (alarms and controls) for all sites. Duplicate (mirrored service) for monitoring for key sites. To increase in-house staff knowledge of the system and introduce security access levels.


Materials not fit for contact with water.


B 4 Very High

Contractors with supervision working on site.

MWP & MWO

Preferred Supplier List TBD

Past T&O incident occurred where a non approved product was used within a drinking supply on an unsupervised site.

Council to have a list of preferred providers that are appropriately trained and competent. WQ & OH&S induction for all contractors that work on water supply sites. Procurement controls through stores.


Faulty portable or online instrument


D 2 Low Instruments are calibrated and serviced regularly. Faulty units are repaired or replaced.

Update instrument (online & portable) maintenance list

Portable and online instrumentation are serviced regularly by contractors.

Ensure that all online and portable instrumentation is included in the maintenance program.




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Unsupervised site visits by internal staff resulting in interruption to processes etc.


B 3 High Operational staff should be on site at time of visit

WP Introduce a site visitor registry book for all key sites

Visitors to sites are not always recorded in the sign in registry or log books.

Training of all staff on the prior notification of works programed and site visiting requirements. Communication between business units. Implement a Permit to Work system and improve security access to all sites


Power failure resulting in loss of supply/pressure or non conforming water.


C 3 High Storage in distribution can sustain supply for a period. Operational staff monitoring the water supply. No gravity fed supply that could be allow non - disinfected water to be supplied.

MWP Emergency response plan TBD

Power outages are more likely to occur from planned outages.

Emergency Response Plan to be developed and to identify key supply zones.


Aging infrastructure leading to a failure and WQ issues.


C 3 High Mains replacement program (Renewal Program) implemented. Reporting of issues by staff and contractors (e.g.. Reservoir inspection contract) to management . Onsite monitoring.

MWO Renewal program identifies mains and valving that need replacement. Customer complaints initiate response.

Asset Management Condition Assessment and Replacement program to include the whole of supply.


Malicious damage leading to water contamination.


C 3 High Operational site visits and routine monitoring.Site security measures.Public informing KSC of illegal activities.

MWP Rare cases in the past of mainly youth access or damage to sites.

Security (CCTV) on high risk sites. Upgrade to security key system


Delayed response to abnormal WQ results.


B 4 Very High

DAL report sent by Fax to TOW identifying any out of limit results. NSW local Heath unit will report results to TOW if required.

MWP NSW Dept. Health WQ Incident response. Field staff reporting to management when out of spec results are noted.

Micro results from DAL can arrive by Fax on a Friday (from Tue samples) which limits response times. Project results can take up to 3-4weeks to reach TOW. Field data is manually recorded and backlog can delay results review by 4-6 weeks.

To obtain a data base for recording and responding to WQ incidents and abnormal results. Field operators need online data entry facilities and automated notification for abnormal results. Non conformance reporting to be implemented against CCP's Trend information and onsite field data (including site events) needs to be available electronically to management for review for abnormal results and responses.


Human error resulting in a water quality incident.


C 4 Very High

Operator training. Documented procedures. Appropriate supervision.

MWP All key sites to have process online monitoring connected to alarms. Relevant and up to date training for all staff. SOP's for critical tasks to be developed and competency based training on SOP's



KEMPSEY LOWER MACLEAY IMPLEMENTATION PLAN

Outcomes and Action Plan - Kempsey Lower Macleay Action No.

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1.01 All

L To develop a KSC Drinking Water Policy and integrate into the Strategic Business Plan. To gain council endorsement and communicate the document throughout the organisation and community.

MWP 31-Jan-14

1.02 All

L There are noted gaps in the Stakeholder engagement process and major clients associated with the distribution system. An up to date record of key contacts is to be developed and made available in TRIM

MWP 30-Mar-14

1.03 All

H A number of procedures for corrective actions at operational sites need to be developed for each of the supply areas.

WTO 30-Mar-14

1.04 All Kem

VH H KSC is to prepare a chemical supply contract that incorporates quality assurance program for the supply of treatment chemicals, and an operational procedure for the acceptance and delivery of chemicals to treatment sites.

WTO 30-Mar-14

1.05 All

M KSC to prepare a summary document on the monitoring program that identifies the verification and operational monitoring conducted on the water supply. Standard operational procedures are to be prepared on the sampling and testing program.

WTO 30-Jun-14

1.06 All KLM S 6.1

H KSC to document the type of customer complaint relating to water quality issues in the following categories (illness, taste & odour, dirty water, blue water, air or white water, and other), to assist with the characterisation of the issues in the treated water supplies. Water technical operational staffs with appropriate knowledge are to review the incoming complaints, respond to and record relevant water quality data and actions to rectify the issue. The record of incoming complaints and response actions will form part of the management reporting requirements.

MWP 30-Mar-14

1.07 All DM5, W5 & W10

VH H Incident & Emergency Response Plan to be developed which includes communication, responses and reporting requirements and provide appropriate training for all staff on the introduction of the Plan. The Plan is to identify key supply zones and detailed emergecy contact list.

MWP 30-Mar-14

2.01 Kem KLM S 3.4.1

L KSC to address the long term need for the Belgrave Falls facility and to remove redundant infrastructure if deemed non-operational.

MWP 30-Jun-15

2.02 Kem KLM S 3.4.2

L Management to determine the viability of maintaining Kinchela as an emergency supply as the site has operational issues and cannot become operational in a short term.

MWP 30-Jun-15

2.03 Kem C1, C2 H M Introduce a Community education program to raise awareness of the need to minimise pollution to water bodies.

MWP 30-Jun-15

2.04 Kem C1 H M Develop a map of high risk septic tank locations within the catchment for review by SDS (Sustainable Development Services) for integration into their Septic Tank monitoring program.

MWP 30-Jun-15

2.05 Kem C1 H M Develop a GIS mapping layer identifying high priority risk zones within catchment.

MWP 30-Jun-15

2.06 Kem C1, C3, C5,B1

H M Establish MoU with adjacent land holders on WQ protection zones (for pathogen control and agricultural chemicals) and notification procedures for flood and bushfire impact concerns.

MWP 30-Jun-15

2.07 Kem C1, C2 H M Develop and implement a catchment risk program to identify pathogens of concern in conjunction with NSW Health

MWP 30-Jun-15

2.08 Kem C2, C4, B3, B5

H M Introduce a normal conditions and flood event sampling project to understand the pathogen and Antinomy and Arsenic load levels in river and bores.

MWP 30-Jun-14




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2.09 Kem C3,DM1, DM3

VH M Water treatment plant installation to control pathogens, turbidity and agricultural chemicals.

MWP Not determined

2.1 Kem C3, C5, C8

VH M Establish notification and response procedures with emergency services for bushfire, flood, chemical spills and traffic incidents that may impact on water ways. Signage on major upstream roads and river crossings.

MWP 30-Dec-14

2.11 Kem C6 M L Continue to support CMA land improvement projects in the river buffer zones to help control nutrient runoff.

MWP 30-Jun-16

2.12 Kem C7, B3 VH M KSC to prepare a flood response protocol for the protection of the water supply (including Bore operation).

MWP 30-Jun-14

2.13 Kem C8 VH L KSC Emergency Management Plan to be updated to include potential water quality incidents in the catchment.

MWP 30-Jun-16

2.14 Kem C8 VH L SOP to be developed on the operation of the bores and recharge channel.

WTO 30-Jun-15

2.15 Kem B1 M M KSC to purchase land surrounding the bore field when the opportunity arises, to isolate external risks.

MWP 30-Jun-16

2.16 Kem B2 H M Fencing around bore pumps to restrict animal access. Restrict use of bores where animal access is possible until fencing able to be undertaken

MWP 30-Jun-15

2.17 Kem B3, B4 H H Initiate a Bore inspection and preventative maintenance program.

WTO 30-Mar-14

2.18 Kem DM1 VH L Update the SMDam Management Plan Alert Level Framework to include Bio volumes and cell numbers notification, and T&O alert levels.

WTO 30-Mar-14

2.19 Kem DM1 VH L Program regular maintenance for the SMD off-take gates. WTO 31-Jan-14

2.2 Kem DM1 VH L Upgrade the SMD Operational weekly task list to include Algae monitoring.

WTO 31-Jan-14

2.21 Kem DM2 VH M Monthly monitoring program for indicator microbiological levels at take-off point of SMD

WTO 31-Mar-14

2.22 Kem DM2 VH M Initiate a monitoring program to determine chlorine resistant pathogens loads at SMD take-off points.

WTO 31-Mar-14

2.23 Kem DM3 VH M Routine operational monitoring for turbidity to be initiated at WTP with preference to online meters.

WTO 31-Jan-14

2.24 Kem DM3 VH M Additional turbidity monitoring to be conducted after storm events.

WTO 31-Mar-14

2.25 Kem DM3 VH M Revegetation around SMD to reduce sediment and nutrient loads during wind and rainfall events.

WTO Ongoing

2.26 Kem DM3 VH M Include the selection of off takes into the SMD Operational Procedure.

WTO 30-Jun-14

2.27 Kem DM4 VH L Incorporate inspection of and recording of operational hours of the SMD aeration line blowers into the SMD site procedure.

WTO 31-Jan-14

2.28 Kem DM4 VH L A routine maintenance schedule for the SMD aeration line blowers to be developed.

MWP 30-Jun-14

2.29 Kem DM5 VH L Develop an emergency response procedure for changes in source water quality.

MWP 30-Dec-14

2.3 Kem DM5 VH L Review and update the SMD Bushfire prevention plan. MWP 30-Dec-14

2.31 Kem DM6, DM7

H L To monitor animal numbers and introduce an 'animal control' program in the secured SMD area when required.

WTO 30-Dec-14

2.32 Kem DM6 M L Include SMD perimeter and water surface inspections into site management procedures to monitor and minimise native and feral animal access to storage.

WTO 31-Jan-14




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2.33 Kem DM8 M L Consider the installation of CCTV at tower bridge to observe vandals and vermin activity.

MWP 30-Jun-16

2.34 Kem TSH1 VH M Require the installation of Chlorine dosing interlocks with Bore pumps.

MWP Immediately

2.35 Kem TSH2, TSH 1, TSM1, TSM 2

VH H Online monitoring to be installed at Sherwood Lime plant & Greenhill Reservoir to measure and control chlorine dosing. Chlorine gas cylinder scales need to be installed and connected SCADA for remote monitoring.

MWP 30-Dec-14

2.36 Kem TSH3 L L Critical supplies to be sourced for Lime doing system. Weekly cleaning of Lime dosing system pipe work.

WTO 30-Jun-14

2.37 Kem TSH4 L L Install online pH monitoring after treatment at the Sherwood Lime plant.

WTO 30-Jun-15

2.38 Kem TSM1 VH M Alarms to be installed on Hypo dosing pumps including the installation of automated duty standby dosing pumps.

WTO 30-Jun-14

2.39 Kem TSM1, TSH1, T1,W2, W9

VH VH Introduce a 'permit to work' approval system for all maintenance and isolations at key dosing sites. Improve communications between KSC business units for prior notification for all contractor works programed and include training of all staff on the prior notification of works programed and site visiting requirements - access permit introduction.

MWP & MWO

30-Jun-14

2.4 Kem TSM3 VH L Introduce a treatment chemical stocktake system to monitor chemical stocks and turnover rates.

MWP 30-Jun-14

2.41 Kem TSM3 VH L Install automatic level sensors and alarms for Critical low level on Hypochlorite storage tanks or replace hypo system with chlorine gas system.

MWP 30-Jun-16

2.42 Kem T1 VH H Back to base security alarm system required for key treatment facilities.

WTO 30-Jun-14

2.43 Kem T1 VH H Installation of a secure compound for the Lime dosing site at the Sherwood Lime Plant.

WTO 30-Dec-14

2.44 Kem T2, D3 VH H Investigate the possibility of emergency power sources for chemical dosing and transfer pumps to maintain supply and dosing for major reservoirs.

WTO 30-Dec-14

2.45 Kem R1 VH M Secure Greenhill Reservoir from bird activity and Potters Hills with secure mesh as reported in Reservoir inspection program.

WTO Check

2.46 Kem R1 VH M Formalise actions identified from inspection program. WTO Check

2.47 Kem R1 VH M KSC to have a electronic document pathway for storing reports on assets (e.g.. Reservoir inspections).

WTO 31-Mar-14

2.48 Kem R2 VH M To prevent unauthorised access to reservoirs, security compounds are required for John Lane (vandalised), Potters Hill, and an upgrade of the external ladder access for all reservoirs.

MWP 30-Jun-16

2.49 Kem R3 H M Include inspections after all storm event within the Reservoir Inspection Procedure.

WTO 30-Mar-14

2.5 Kem R4 H L Modification required of inlet/outlets on reservoirs or installation of diversion plates, to prevent sediment disturbance.

MWP 30-Jun-16

2.51 Kem R5, R6, R7

VH VH Top up disinfection dosage rates/regimes needs to be documented and available on site, for all Reservoirs to overcome low or inadequate disinfection levels. Include quality control checks prior to top up dosing.

WTO 30-Mar-14

2.52 Kem R5 H M Introduce online chlorine monitoring and secondary dosing at key sites.

MWP 30-Jun-15




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2.53 Kem R5, R7 VH VH Clybucca Res to have a motorised valve installed to improve water level turnover.

MWP 30-Jun-15

2.54 Kem R5, R6 VH H Interlock control placed on all primary disinfection systems. MWP 30-Jun-15

2.55 Kem R7 VH VH To adjust fill cycle in John Lane as it has suspended sediments on wall.

WTO 30-Mar-14

2.56 Kem R7 VH VH Flow meter monitoring or derived flow monitoring on outlet of reservoirs.

MWP & MWO

30-Jun-15

2.57 Kem R7 VH VH Installation of directional nozzles/mixers in the Reservoirs. MWP 30-Jun-15

2.58 Kem R7 VH VH Propose a water carting fill station installation at Clybucca to encourage turnover of reservoir.

MWS 30-Mar-14

2.59 Kem R8, W7, W2

VH VH To formulate a Safety and WQ induction program for all contract staff that have access to water supply facilities and conduct in house training for maintenance staff on WQ protection.

MWP 30-Mar-14

2.6 Kem R9 VH H Include SOP for alternative or emergency supplies or water restriction implementation. Include procedure for taking Greenhill Res offline.

MWP & MWS

30-Jun-14

2.61 Kem R9 VH H Include drawings of Reservoirs in ASAM. MWP 30-Jun-14

2.62 Kem R9 VH H Upgrade telemetry at reservoir sites and include a review of the critical levels set and associated alarms for individual reservoirs.

MWP & MWO

30-Jun-15

2.63 Kem D1 VH VH KSC to enforce a regular back flow inspection and maintenance program based on priority and risk, with a priority on booster pump station supply areas.

MWO 30-Jun-14

2.64 Kem D1 VH VH KSC to maintain an up to date register of high risk connections. MWS 30-Mar-14

2.65 Kem D1 VH VH KSC to ensure compliance to plumbing codes for back flow prevention and high risk areas.

MWO 30-Jun-14

2.66 Kem D2 VH H Maintenance crews require separate repair equipment and clothing for water main works, and wash down & disinfection procedures TBD for equipment that can not be duplicated.

MWO 30-Jun-14

2.67 Kem D2 VH H Storage of water main repair & installation materials to be improved to prevent contamination from vermin, debris and faecal material.

MWO 30-Dec-14

2.68 Kem D2 VH H Re-chlorination program for mains TBD, including the requirement for staff to measure disinfection levels after repair work.

MWO &MWP

30-Dec-14

2.69 Kem D2, D5 VH H Work Order Action sheet to be modified to include valve maintenance issues identified, and conduct training for staff on identifying the condition rating of the mains.

MWO 30-Dec-14

2.7 Kem D2 VH H Main breaks information layer to be placed on MapInfo. MWO 30-Dec-14

2.71 Kem D2 VH H Civic View requires updating on new mains installed for the last 10 years.

MWS 30-Dec-14

2.72 Kem D3 VH H Alternative power to be installed for power outages on pressurised zones (Burnt Bridge & Everinghams Lane) or investigate alternative water supplies (i.e. tank on tower).

MWO 30-Dec-14

2.73 Kem D3 VH H KSC to Initiate a routine maintenance program for all supply pressure pumps and records to be stored in asset register.

MWO 30-Mar-13

2.74 Kem D4, D5 H H KSC to initiate a distribution valve identification, marking and maintenance program. MapInfo layer to include valve orientation.

MWO 30-Jun-14




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2.75 Kem D4, D5 H H Maintenance staff to be trained on valve operation and flushing after repairs including an implementation of a valve 'Check Sheet' with tagging system.

MWO 30-Jun-14

2.76 Kem D4, D6,D8

H H Control biofilm levels within the distribution by conducting a regular mains cleaning program. Problem areas to be placed on routine flushing programs with the linking of mains where possible and 'dead ends' minimised in new developments.

MWP & MWO

30-Jun-14

2.77 Kem D4 H H Review customer complaints to identify dirty main areas. MWP & MWO

30-Jun-14

2.78 Kem D5 H H KSC policy to include acquisition of RH closing valves to be standardised.

MWO 30-Jun-14

2.79 Kem D6 H H Identify and list sites for Mains Replacement program. MWO Ongoing

2.8 Kem D7 VH L KSC to investigate a notification procedure to inform carters if there is a main breaks or supply issue for fill stations (4 fill stations for all of KSC). SDS to inform Water division of auditing of carters.

MWO 30-Dec-14

2.81 Kem D8 M L Communication procedure to be initiated between KSC and Rural Fire services for prior notification of RFS exercises to prevent disturbances of mains.

MWP 30-Dec-15

2.82 Kem D9 VH VH All new mains to be inspected and have a disinfection program and verification before connection.

MWP & MWO

30-Dec-14

2.83 Kem W1 H L To have an encouraging and supportive work environment. To prepare a succession planning process and implement the proposed new salary scheme.

General Manager

30-Mar-14

2.84 Kem W3 H H Introduce a 'water by agreement' (WBA) to customers on rising main that the WQ may be variable for drinking (highly chlorinated). Annual notification sent to customers reminding them of the WBA.

MWS 30-Dec-14

2.85 Kem W4, W6 VH H Upgrade the telemetry and SCADA system (alarms and controls) for all sites.On call staff to regularly check Radtel and SCADA for system alarms. Duplicate (mirrored service) for monitoring for key sites.To increase in-house staff knowledge of the system and introduce security access levels.

MWP & MWO

30-Jun-15

2.86 Kem W7, W2 VH VH Council to have a list of preferred providers that are appropriately trained and competent.

MWP & MWO

30-Mar-14

2.87 Kem W7 VH VH Procurement controls to be introduced through stores to ensure that all sourced materials are fit for contact with potable water.

MWP & MWO

30-Jun-14

2.88 Kem W8 VH L Ensure that all online and portable instrumentation is included in the cyclic maintenance program.

WTO 30-Jun-15

2.89 Kem W11 VH H Asset Management Condition Assessment and Replacement program to include the whole of supply.

MWS 30-Dec-14

2.9 Kem W12 VH H Security (CCTV) on high risk sites. MWP 30-Jun-15

2.91 Kem W13, Ov 4.5.2

VH VH KSC to establish a centralised water quality data base for the recording of operational and compliance monitoring, including response to WQ incidents and abnormal results. Field operators need online data entry facilities and automated notification for abnormal results. The data base is to have the ability to produce reports, trend graphs and alert notifications (including site events).

MWP 30-Jun-14




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2.92 Kem W14 VH VH All key sites to have process online monitoring connected to alarms.

MWP 30-Jun-15

2.93 Kem W14 VH VH SOP for critical tasks to be developed and competency based training on SOP's. Relevant and up to date training for all staff.

WTO 30-Jun-14

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