network operator and retail licence application form · 1200088 1163828 1200092 1163830 1200094...

Network Operator and Retail Supplier Licence Application Form

8 Chifley Square

Mirvac Real Estate Pty Ltd

Appendices Section 4

APPENDIX 4.2.1 PART I

PROCESS FLOW DIAGRAM

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APPENDIX 4.2.1 PART II

GE SUPPLIED SKIDS INFORMATION

(CONFIDENTIAL SUBMISSION ONLY)

APPENDIX 4.2.1 PART III

RO SKID INFORMATION

Fact Sheet

Find a contact near you by visiting www.ge.com/water and clicking on “Contact Us”.

* Trademark of General Electric Company; may be registered in one or more countries.

©2010, General Electric Company. All rights reserved.

FS1131EN.doc Sep-10

E4H Series 50 Hz Reverse Osmosis Machine 2.6-6.8 cubic meters per hour

Figure 1: E4H Series

When you mention reverse osmosis (RO), GE is the first name to come to mind. Our E-series RO ma-chines (Figure 1) are designed for durable operation, high quality product water production, easy installa-tion and straightforward control.

General Properties

Typical Applications • Process ingredient water • Safe drinking water • Boiler feed water • Ion exchange pre-treatment

Standard Economy Features • 5-micron pre-filter and housing, 20-inch (50.80 cm) • Automatic inlet shutoff valve • Motor thermal protection • Pre/Post-filter and primary/final pressure

gauges

• Permeate and concentrate flow rotameters • Permeate conductivity meter • ALARMS: Low inlet pressure, high amp draw • Feed water flush on shut down

Deluxe (DLX) Features – In addition to ECN Features • Accutrak RO microprocessor controller • SD card for collection of operating data • Permeate and concentrate paddlewheel flow

sensors • Inlet pH sensor • Permeate tank level monitoring • Chemical dosing pump for antiscalant dosing or

pH adjustment • Clean in Place (CIP) system, 5 HP (3.7 KW) • ALARMS: Low inlet pressure, high concentrate and

permeate pressure, high temperature, high per-meate conductivity, high/low pH, motor fault, and fill-time exceeded

Table 1: Operating Parameters

Operating Pressure 14-15 bar Maximum Recovery 75% Nominal Rejection 95-98% Operating Temperature 13-30 °C (55-85 °F) Minimum Inlet Pressure 2 bar (30 psig) Design Temperature 25 °C (77 °F)

FS1131EN

Table 2: Materials of Construction

Frame Painted Carbon Steel Membrane Elements Desal AG4040 Membrane Housing FRP Low Pressure Pipe Schedule 80 PVC High Pressure Pipe Stainless Steel Motor Starters NEMA 4

Table 3: Pump and Motor

Pump Manufacturer Tonkaflo Pump Type Multi-stage, centrifugal Materials SS shell/housing, Noryl* internals Castings SS inlet/discharge Motor 3-phase, TEFC, 380 VAC

Table 4: E4H Specifications - 50 Hz

Model E4H-16K E4H-21K E4H-27K E4H-38K E4H-43K

ECN DLX

1163816 1200080

1163820 1200084

1163824 1200088

1163828 1200092

1163830 1200094

Flow Specifications

Recovery Range: Permeate Rate: m3/h (gpm) Concentrate Rate: m3/h (gpm)

66-75% 2.56 (11.2)

0.9 (3.4)

66-75% 3.4 (15) 1.1 (5.0)

66-75% 4.3 (18.8) 1.4 (6.3)

66-75% 5.9 (26.2) 2.0 (8.8)

66-75% 6.8 (30) 2.3 (10)

Pump and Motor

RO Pump Model SS2834D SS2834D SS5512D SS5518KB SS5518KB RO Motor: KW (HP) 5.6 (7.5) 5.6 (7.5) 7.4 (10) 11.2 (15) 11.2 (15) CIP Pump Model: (DLX only) SS2808AZ SS2808AZ SS5503G SS5503G SS5503G CIP Motor: KW (HP) 1.5 (2) 1.5 (2) 2.2 (3) 2.2 (3) 2.2 (3)

Membrane Elements and Filters Membrane Quantity Array Pre-Filter Quantity

9 2-1 2

12 2-2 2

15 3-2 2

21 4-3 2

24 5-3 2

Connections

Inlet: cm (inch) Permeate: cm (inch) Concentrate: cm (inch)

3.8 (1.5) 2.5 (1.0) 2.5 (1.0)

3.8 (1.5) 2.5 (1.0) 2.5 (1.0)

3.8 (1.5) 2.5 (1.0) 2.5 (1.0)

3.8 (1.5) 2.5 (1.0) 2.5 (1.0)

3.8 (1.5) 2.5 (1.0) 2.5 (1.0)

Dimensions & Weights

Height: cm (inch) Width: cm (inch) Depth: cm (inch)

158 (62) 335 (132)

92 (36)

158 (62) 335 (132)

92 (36)

158 (62) 335 (132)

92 (36)

158 (62) 335 (132)

92 (36)

158 (62) 335 (132)

92 (36)

Shipping Weight Estimate: kg (lb) ECN

500 (1000)

500 (1050) 700 (1550) 800 (1700) 820 (1800)

Shipping Weight Estimate: kg (lb) DLX 530 (1150) 570 (1250) 800 (1750) 870 (1900) 910 (2000)

APPENDIX 4.2.3

LOCATION MAP

APPENDIX 4.2.7

MONTHLY WATER BALANCE

8 Chifley Square water balance June 2011

Arup - June 2011

Monthly water balanceAll numbers in KL and monthly averages

MonthCooling

Towers

Cooling

Basebuild

Building

NPCW

Total NPCW

loadRainwater

Proposed BW

plant

processed with

80% RO

Building

Black

Water

Blow Down

15% total

Total Black

water

generated with

15% to sewer

Sewer mining

required

including RO

losses 20%

Building

Potable

Extra 10%

cooling tower

from potable

January 394.8 500.00 218.4 1113.20 120.3 1191.5 507.1 134.2 565.3 626.3 288.7 295.90

February 351.8 500.00 218.4 1070.24 136.8 1120.2 507.1 127.8 558.8 561.4 288.7 190.04

March 382.5 500.00 218.4 1100.93 153.0 1137.5 507.1 132.4 563.4 574.1 288.7 93.12

April 380.5 500.00 218.4 1098.88 147.1 1142.2 507.1 132.1 563.1 579.1 288.7 58.84

May 394.8 411.66 218.4 1024.86 143.1 1058.1 507.1 121.0 552.0 506.1 288.7 0.00

June 368.2 266.66 218.4 853.27 149.9 844.1 507.1 95.2 526.3 317.8 288.7 0.00June 368.2 266.66 218.4 853.27 149.9 844.1 507.1 95.2 526.3 317.8 288.7 0.00

July 394.8 297.12 218.4 910.32 114.4 955.1 507.1 103.8 534.8 420.3 288.7 0.00

August 388.7 300.51 218.4 907.58 95.4 974.7 507.1 103.4 534.4 440.3 288.7 0.00

September 374.3 300.51 218.4 893.26 81.2 974.5 507.1 101.2 532.3 442.2 288.7 0.00

October 394.8 497.62 218.4 1110.82 90.4 1224.5 507.1 133.9 564.9 659.6 288.7 0.00

November 374.3 463.27 218.4 1056.02 97.1 1150.7 507.1 125.6 556.7 594.0 288.7 0.00

December 388.7 500.00 218.4 1107.07 90.9 1219.4 507.1 133.3 564.3 655.1 288.7 152.40

Total 4588.3 5037.4 2620.8 12246.5 1419.6 12992.3 6085.2 1443.8 6616.3 6376.0 3464.4 790.30

Annual summary

Annual KL/year KL/m21200.00

Total NPCW Consumption

Annual KL/year KL/m2

19000

Potable 4254.7 0.22

NPCW - WCs 2620.8

NPCW- Cooling towers 9625.7

Total NPCW 12246.5

Total water (if all Potable) 16501.2 0.87

0.00

200.00

400.00

600.00

800.00

1000.00

NPCW (non-CT)

Cooling Towers Base build

Cooling Tower Tenants

APPENDIX 4.2.8

DAILY WATER BALANCE

8 Chifley Square water balance

Arup - June 2011

Daily water balance for January Sewer mining requiredAll number litres and Basebuild cooling towers capped at 500KL for month All numbers litres

JanCooling

towersWC

Total Daily

NPCW

required

Average

Rainwater

Required

output from

Black water

plant

Black water

size to offset

RO loses

@20%

Building

generated

black water

Cooling

tower Blow

down 15%

Total building

generated

Black water

Total

allowing 15%

to sewer

Sewer mining

required number

includes RO losses

1 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

2 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

3 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

4 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

5 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263

6 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 62636 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263

7 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

8 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

9 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

10 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

11 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

12 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263

13 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263

14 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

15 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

16 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

17 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

18 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

19 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861

20 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 86120 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861

21 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

22 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

23 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

24 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

25 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

26 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861

27 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861

28 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

29 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

30 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

31 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235

Total 920,953 231,840 1,152,793 119691 1033102 1239723 538430 138143 796264 676824 562898

BW plant size: 50KL/day plant utilising buffer storage in NPCW tank Approximately 50/50 sewer mining and building black water loadBW plant size: 50KL/day plant utilising buffer storage in NPCW tank Approximately 50/50 sewer mining and building black water load

APPENDIX 4.2.10

PRELIMINARY RISK ASSESSMENT

8 Chifley Square

Recycled Water Plant

Preliminary Risk Assessment

Preliminary Risk Assessment – 8 Chifley Square Recycled Water Plant

1

Prepared for: Planet Plumbing Group Pty Ltd By: Innaco Pty Ltd Level 5, 79 Victoria Avenue, Chatswood, NSW 2067 February 2012

REVISION HISTORY

Revision number

Prepared by Description Date

0 Lars Herngren IPART issue February 2012

DOCUMENT ACCEPTANCE

Action Name Signed Date

Prepared by Lars Herngren February 2012

Reviewed by Peter Warren February 2012


2

1. Introduction and methodology Innaco Pty Ltd is currently preparing the detailed design documentation, approval documentation to supply, install and operate the proposed recycled water plant at 8 Chifley Square. As part of the concept design, a preliminary risk assessment has been prepared to assist Mirvac in the application for a network operator’s license under the Water Industry Competition Act 2006 and to assist in the detailed design process. During the risk assessment process all steps of the scheme, sources of water, treatment, storage, distribution and irrigation systems, end uses, any residuals, any unintended or unauthorised end uses, any discharges or releases to the environment, receiving environment and routes of exposure were considered in relation to the quality and/or safety of the recycled water. A risk assessment of the identified potential public and environmental health impacts enables a level of probability or likelihood of occurrence of the impact and the significance of the impact to be assigned. This enables a risk level to be assigned to each impact. The level of risk can then be used as a guide to determining the nature and extent of environmental management required for each environmental aspect. The following tables illustrate the method of analysis utilised for this risk assessment. The method is based on the Australian/New Zealand standard for Risk Management (AS/NZS 4360:2004) and the Australian Guidelines for Water Recycling: Managing Health and Environmental Risks (NWQMS 2006), modified slightly to reflect risks as they apply to the scheme. Table 1.1: Measures of Likelihood Level Descriptor Description A Almost

Certain Event expected to occur often (several times per year)

B Likely Event will probably occur often (once every 1 to 3 years)

C Possible Event might occur (once every 3 to 10 years) D Unlikely Event could occur (once every 20 years) E Rare Event will occur only in rare circumstances (once

every 100 years)


3

Table 1.2: Measures of Consequence of Impact Level Descriptor Description

Human health Environmental health 5 Extreme Severe illness or death

affecting a large population Severe, permanent environmental impact

4 Major Severe illness or death affecting a small population

Severe, long-term environmental impact

3 Moderate Short-term, low level illness, affecting a large population

Localised, medium-term environmental impact

2 Minor Short-term, low level illness affecting a small population

Localised, short-term environmental impact

1 Insignificant No detectable human health illness

No detectable environmental impact

Table 1.3: Qualitative Risk Analysis Matrix – Risk Rating

Likelihood Consequences Insignificant (1) Minor (2) Moderate

(3) Major (4) Extreme (5)

Almost Certain (A) Low Medium High Very High Very High Likely (B) Low Medium High Very High Very High Possible (C) Low Medium Medium High Very High Unlikely (D) Low Low Medium High High Rare (E) Low Low Low Medium High Table 1.4: Risk Rating and Required Management Level Risk Rating Required Management Level Very High Extremely or significantly impacting activity, which requires a high level of

management. Immediate action required.

High Requires further management planning to ensure that environmental issues are addressed. Requires additional investigation to confirm the level of risk.

Moderate Managed by utilising standard procedures or guidelines. May be managed as part of on-going site management.

Low Certain activities, which offer negligible impacts on an infrequent basis, may be regarded as insignificant given current levels of control. The risk of the activity is accepted without applying additional management


4

2. Risk events and associated ratings The risk assessment for the site is an on-going process and will be reviewed during the design phase to ensure appropriate measures have been taken in the design (where applicable) to manage the risks. This preliminary risk assessment is the first step in creating HAZOP and HACCP checklists that will be carried over into the construction stage and the commission/handover stage of the project.

Preliminary Risk AssessmentProject: 10570 - Chifley Square Revision Description Date Issued By

1 Preliminary Issue 24/02/2012 DR, LH

Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco

Additional Control measures Responsibility for additional control measures

Residual likelihood

Residual Consequence

Residual risk

Is this a critical control point?

Control point number

Elevated temperature in building waste water that may influence the treatment plant operation

Pathogens in recycled water

Unlikely Minor Low Pump station and balance tank. Piped system throughout building. Underground sewer in street.

N

Unplanned contaminants within source water such as cleaning products, metho etc. Small volumes

Unacceptable levels of nutrients, metals, surfactants, organic compounds, volative

Possible Insignificant Low pH sensor in pump station to detect abnormal values. Pump station can be pumped out. All inflow can be turned off.

Cleaning procedures being maintained. Effluent monitoring to detect certain chemicals. Chemical management.

Mirvac Unlikely Insignificant Low N

Illegal disposal of foreign material, chemicals and solids within source water (disposal in toilets etc)

Breakdown of treatment plant or pumps

Possible Minor Medium Macerator pumps, inlet screens on both rainwater and blackwater treatment

Signage. Separate disposal for hygiene products and sharps. Alarm on macerator pump to be linked to treatment plant control system.

Mirvac Unlikely Minor Low N

High concentrations of oil and grease entering the treatment system

Reduction in treatment process effectiveness. Damage to UF Membranes

Possible Moderate Medium Separate oil and grease arrestors installed which will be maintained regularly. Sensor to be installed in pump station. Inflow to be diverted if high levels occur. Rainwater only harvested from roof.

Mirvac to schedule pumpout of oil and grease arrestors regularly

Mirvac Rare Moderate Low Y CCP2

Inflow exceeds expected volume or flow rate or prolonged high inflow situations

Overflow and spill in room

Possible Moderate Medium Duty/Standby pumps in pump pit. Gravity overflow connection from pump pit to sewer. Diversion valves on both sewer mining connection and building connection. Overflow connections to sump pit from balance tank. High level alarms in pump station to close diversion valves. Diversion of rainwater to stormwater system

Rare Moderate Low Y CCP3

Periods of none or little inflow (holiday, maintenance etc)

Reduction in treatment process effectiveness

Possible Minor Medium Recycled water can be re-circulated through the system to maintain process activity.

Unlikely Minor Low N

High levels of solids, paper etc in Sydney Water main

Blockage of sewer mining connection leading to no flow to pump station

Possible Minor Medium None Sewer mining connection to be approved by Sydney Water.


No usage of sewer mining connection to top up supply for long periods

Blockage of sewer mining connection leading to no flow to pump station

Possible Minor Medium Motorised valve can be opened to let flow through to pump station for processing or overflow. To be scheduled in logic.

N

Power failure Inflow continues leading to overflow and spills

Possible Minor Medium Motorised diversion valves to default shut in a power failure. Gravity overflow connection from pumpstation to sewer in Elizabeth St.


Reverse flow into Sydney Water main Discharge into Sydney Water main outside trade waste agreement

Possible Minor Medium Overflow connection in pump pit lower than sewer invert.


Influent quality out of spec - rainwater Mixing with treated water in the recycled water storage tank

Unlikely Minor Low Screen and chlorination treatment

Influent quality out of spec - wastewater Upset biological process and recycled water quality

Possible Minor Medium Motorised diversion valves to sewer. pH sensor and oil sensor in pump station. Pump station can be pumped out to sewer

Unlikely Minor Low Y CCP1, CCP2

CCP1Pathogens in recycled water

Cleaning chemicals that may influence the biological treatment system leading to pathogen removal loss

Almost certain pH sensor in pump station to detect abnormal values. Pump station can be pumped out. All inflow can be turned off.

Source Blackwater and Rainwater

YMinor Medium List of approved chemicals to enter the treatment plant should be described in the cleaning procedures for the building.

Mirvac Possible Minor Medium



Residual likelihood


Residual risk




Pump failure Possible Minor Medium Macerator pumps, duty/standby Signage in building toilets. Mirvac Unlikely Minor Low N

Prolonged high inflow situations Pump station overflow Possible Minor Medium High level alarms, gravity overflow connection to sewer

Unlikely Minor Low Y CCP3


Tank damage or failure

Rare Moderate Low Tank design to consider such items N

Odour from pump station Odour complaints from staff or customers

Possible Insignificant Low Closed tanks. Mechanical ventilation to room.

N

Limited pump station capacity due to elevated sludge levels in tank

Low pump station capacity

Possible Minor Medium High level alarms, gravity overflow connection to sewer. Pump out of pump station if required.


No influent Low level, biological process suffer

Possible Minor Medium Low level alarm Unlikely Minor Low N

Pump station rupture Spill Unlikely Moderate Medium Ensure design and installation of pump station is certified for its design life. Ensure correct maintenance

Rare Moderate Low N

High or low pressure due to pipe burst or pipe blockage

Pump failure Possible Minor Medium Trip and alarm on pumps Unlikely Minor Low Y CCP4

Pump noise complaints from staff and customers

Noise emitted from room

Possible Insignificant Low Acoustic barriers. N

Odour complaints from residents, staff or customers

Odour emitted from treatment plant room

Possible Insignificant Low Ventilation in room. N

Unauthorised access to treatment plant room Personal injury, vandalism, chemical spills, treatment process change

Possible Major High Locked room Mirvac access procedures. Plant room security. Alarmed and monitored by security.

Mirvac Rare Major Medium Y CCP5

Non compliance with plant operational and maintenance procedures

Treatment plant failure, unacceptable recycled water quality, risk of personal injury

Possible Moderate Medium Treatment plant induction and training. Audit and inspection process. Operation and maintenance contract to be kept in place and followed.

Engage suitable contractor Mirvac Rare Moderate Low N

Emergency situations, unplanned events, plant breakdown, catastrophic events

Personal injury, human and environmental health risk, cross contamination, overflows

Unlikely Major High None Emergency and incident response procedures , pumpout procedures

Mirvac Rare Major Medium N

Power failure Shutdown of plant Almost certain Minor Medium Diversion to sewer Emergency and incident response procedures. Emergency pumpout if required.


Incorrect installation Treatment plant failure, unacceptable recycled water quality, risk of personal injury

Likely Minor Medium Treatment plant supplier installation and commissioning


Plant fails to produce recycled water meeting water quality requirements

Human and environmental health risk

Possible Minor Medium Commissioning, validation and verification. On-going testing to meet authority requirements. Dual reticulation in toilets, cooling tower and irrigation lines.

Effluent monitoring, operation & maintenance procedures to be followed, alarms to be connected to central alarm system in building.

Mirvac Unlikely Minor Low Y CCP6

Treatment system general - Blackwater and rainwater

Pump station and macerator pumps -Blackwater



Residual likelihood


Residual risk



High inflow Exceeding screen capacity

Possible Minor Medium Capacity of screen to match pump station capacity, flow meter


High levels of solids or large material etc entering screens

Screen blockage Possible Minor Medium Duty/standby screens, overflow connected to sump pit


No outflow from screens to tank due to screen blockage

No flow to bioreactor Possible Minor Medium Duty/standby screens, overflow connected to sump pit, alarms


Odour complaints Odour emitted from screens

Possible Minor Medium Screening area to be covered Unlikely Minor Low N

High inflow Exceeding screen capacity

Possible Minor Medium Diversion to stormwater Unlikely Minor Low N

High levels of solids or large material etc entering screens

Screen blockage Possible Minor Medium Diversion to stormwater Unlikely Minor Low N

No outflow from screens to tank due to screen blockage

No flow to recycled water tank

Possible Minor Medium Diversion to stormwater Unlikely Minor Low N

Odour complaints Odour emitted from screens

Unlikely Minor Low Enclosed screen Low N

Low level Insufficient chlorine dosing

Possible Minor Medium None Regular inspections as part of general operation and mainteance


Low chlorine residual Poor disinfection Possible Minor Medium None Residual chlorine sensor Planet Plumbing Unlikely Minor Low N

High chlorine residual Odour/Aesthetic issues Possible Minor Medium None Residual chlorine sensor Planet Plumbing Unlikely Minor Low N

High or low pressure Pump failure Possible Minor Medium None Trip and alarm on pump Planet Plumbing Unlikely Minor Low N

High inflow Overflow Possible Minor Medium Level sensor with high level alarm in tank. Overflow connected to sewer


Deposition of solids, buildup of material Lowering capacity of buffer tank

Possible Minor Medium Inlet screens before tank. Macerator pumps before tank. Pump out from maintenance hatches if required


Balance tank pump failure No flow to bioreactor Possible Minor Medium Duty/standby pumps, trip and alarm Unlikely Minor Low Y CCP8

Low inflows and usage Tank turn septic Possible Minor Medium Pumps to be able to recirculate water in tank


Pump failure Reduction in effluent quality and odour complaints

Possible Minor Medium Tripped overload alarm in control panel. Duty/Standby pumps for process and RAS.

Operation and maintenance manual of the plant to be followed. Service of pumps included in maintenance contract.


High level of gross solids entering tank Sludge build up in base of tank

Possible Minor Medium Inlet screening Unlikely Minor Low

High level Overflow Possible Minor Medium Gravity overflow connection to sewer. High level alarms


Low level Biomass dies leading to reduced end use water quality

Possible Minor Medium Level sensor with alarms in tank Unlikely Minor Low Y CCP10

DO levels not reaching set values Blowers keep running - Risk for Foaming

Possible Minor Medium Timer on blowers to avoid over-aeration. Bioreactor to be closed top. DO sensor to have automatic cleaning.


Low air flow from blowers Biomass dies leading to reduced end use water quality

Possible Minor Medium DO sensor in bioreactor with set values. Blower alarms.


Accidental shutdown of plant leading to anaerobic conditions in bioreactor tank

Odour complaints Possible Minor Medium None Room to be locked at all times. Access only by trained staff. Shutdown procedure to follow operation and maintenance manual


Drop in pH Biomass dies leading to reduced end use water quality

Possible Minor Medium pH sensor in bioreactor. Chemical dosing available, caustic.


Blower failure Reduction in effluent quality and odour complaints

Possible Minor Medium Tripped overload alarm in control panel. Duty/Standby process blowers.

Operation and maintenance manual of the plant to be followed. Daily checks. Service of pumps included in maintenance contract.


Chlorine dosing - rainwater

Balance tank and pumps - blackwater

Inlet screens -Rainwater

Bioreactor tank - blackwater

Inlet screens - Blackwater



Residual likelihood


Residual risk



High level Overflow from membrane tank

Possible Minor Medium Level sensor in membrane tank. Overflow to sewer.


Low level Membrane dries out and fouls

Possible Minor Medium Level sensor in membrane tank. Low level alarm.


Blower failure or lack of pressure Membrane fouling from lack of scouring

Possible Minor Medium Trip alarm Unlikely Minor Low Y CCP16

Maintenance cleans carried out incorrectly Damage to membranes Possible Minor Medium Follow operation and maintenance procedures

Operation and maintenance manual of the plant to be followed.


High flux through membranes Reduction in effluent quality

Possible Minor Medium Trans-membrane pressure reading and alarms. Turbidity meter downstream.


RO system - blackwater

Electrical conductivity differential low Reduction in effluent quality

Possible Minor Medium Online EC meter to shut down production of differential is not met.


Low levels Reduction in effluent quality due to disinfection problems or pH control

Possible Minor Medium Daily checks. Level alarms on critical chemicals

Ensure operational procedures are followed.


Low dosage Degradation of stored chemical

Possible Minor Medium Size chemical storage appropriately Unlikely Minor Low N

No dosing Reduction in effluent quality

Possible Minor Medium Pressure limiting devices to be installed


High dosage Foaming, reduction in effluent quality

Possible Minor Medium pH sensor in bioreactor. Ability to send out of spec water to sewer. Chlorine residual sensor


High turbidity Use of recycled water of insufficient quality for human and environmental health

Possible Minor Medium Turbidity measured online upstream of UV. UVT alarm on UV.


Automatic wiper failure Insufficient disinfeciton

Possible Minor Medium Automatic wiper alarm Preventative maintenance Mirvac/Operator Unlikely Minor Low Y CCP22

No flow Lamp fouling due to over heating

Possible Minor Medium Lamp cleaning alarm. Unlikely Minor Low Y CCP23

Low transmittance Insufficient disinfeciton

Possible Minor Medium UVT alarm Unlikely Minor Low Y CCP24

High flow Insufficient disinfeciton

Possible Minor Medium Hydraulic design to ensure head losses have been allowed for and pump capacities are correct


UF-membranes -blackwater

Chemical dosing systems - blackwater

UV-disinfection - blackwater



Residual likelihood


Residual risk



Low level Insufficient chlorine contact tank leading to insufficient disinfection

Possible Minor Medium Low level alarm Unlikely Minor Low Y CCP25

High level Overflow Possible Minor Medium High level alarm, bunded chemical area connected to floor waste and pump out pit.


Low chlorine residual Poor disinfection Possible Minor Medium Residual chlorine sensor Unlikely Minor Low Y CCP20

High chlorine residual Odour/Aesthetic issues Possible Minor Medium Residual chlorine sensor Unlikely Minor Low Y CCP20

High or low pressure Pump failure Possible Minor Medium Trip and alarm on pump Unlikely Minor Low Y CCP26

Low level due to high demand Pump failure Unlikely Minor Low Pump overload protection. Potable water supply backup to tank. Level sensor.

Y CCP27

High level Storage tank overflow Possibe Minor Medium Overflow connection to sewer system. Unlikely Minor Low Y CCP27

Odour from storage tank Odour complaints Possible Insignificant Low Closed tank. Treated water N

Unauthorised use of stored water (overloading irrigation area etc)

Human and environmental health

Possible Minor Medium None Operational controls. Monitoring. Irrigation controls. Moisture sensors to be installed.


Deliberate or inadvertent misuse of recycled water

Human and environmental health

Possible Minor Medium None Signage, distribution design to follow Australian Standards. Education. Operation & Maintenance procedures to be followed


Salinity levels above accepted levels Less cycles in the cooling tower reuse

Possible Minor Medium EC meter after RO system EC meter in rainwater tank Planet Plumbing Unlikely Minor Low N

Cross connections Reverse flow in mains supply

Likely Moderate High Backflow prevention devices. Dual reticulation.

Recycled water piping to be lilac coded as required in Australian Standards. Signage on tanks.

Mirvac/Hydraulic Contractor

Rare Moderate Low N

Chlorine contact tank - blackwater

Final effluent storage tank - rainwater and blackwater



Residual likelihood


Residual risk



Recycled water not meeting high risk exposure level recycled water requirements (contact, inhalation or ingestion)

Human health risk (illness)

Possible Minor Medium Critical control points to control log removal in order

Effluent monitoring, operational procedures of treatment plant. Disinfection alarms.


Flow variability and reduced or increased pressures

Irrigation variability or tank overflow

Possible Minor Medium None Irrigation system design. Physical inspections of irrigation system and sprinkler heads etc. Alarms and water level sensor in recycled water tank to trigger pumpout. Connect alarm to treatment plant control panel.

Mirvac/Irrigation system designer


Excess irrigation causing surface runoff due to poor irrigation uniformity or scheduling

Erosion of soil Possible Minor Medium None Soil and plant monitoring plan to be implemented. Visual inspections.

Mirvac/Irrigation system designer


More water applied than uptake by plants Plant deterioration or death

Possible Minor Medium None Soil and plant monitoring plan to be implemented. Visual inspections


Excessive salts applied with the recycled water or groundwater levels high

Salt scaulds Possible Minor Medium RO system in place Soil and plant monitoring plan to be implemented. Visual inspections


Salinity, sodicity or boron toxicity of soil Death or poor growth of grass/plants

Possible Minor Medium RO system in place Soil and plant monitoring plan to be implemented. Visual inspections


Boron toxicity, salinity, phosphorous or Chloride toxicity caused by the recycled water

Leaf discolouration or disfiguration

Possible Minor Medium Treatment system Soil and plant monitoring plan to be implemented. Visual inspections


Excess nitrogen applied Lanky, succulent weak plants

Possible Minor Medium Biological treatment Soil and plant monitoring plan to be implemented. Visual inspections


Unexpected inflow concentrations of certain chemicals/pollutants. Chemical spills, washdown of fatty food etc.

Other chemicals/pollutants leaching to groundwater or water courses

Possible Minor Medium None Soil and plant monitoring plan to be implemented. Visual inspections


High chlorine residuals in recycled water Toxicity in plants and water bodies

Possible Minor Medium Chlorine residual sensor Soil and plant monitoring to be implemented in accordance with plans. Effluent monitoring.


Increasing the salinity of fresh groundwater or surface water

Leaching of salts from soil

Possible Minor Medium RO system in place Soil and plant monitoring plan to be implemented. Visual inspections.


Odour complaints from staff and customers Unpleasant odour from irrigated area

Unlikely Insignificant Low None Effluent monitoring, operational procedures of treatment plant. Disinfection alarms.

Mirvac N



Possible Minor Medium Ability to switch to potable water. Disinfection alarms.

Effluent monitoring, operational procedures of treatment plant. Signage and education.

Mirvac/Operator Unlikely Minor Low Y CCP28

Aesthetically displeasing Discolouration Possible Insignificant Low Turbidity monitoring in place. N

Odour in recycled water Odour complaints Possible Insignificant Low Chlorine disinfection N



Possible Minor Medium Turbidity monitoring, chlorine residual monitoring, CCPs in place to ensure water is not out of spec.

Unlikely Minor Low Y CCP

TDS concentrations too high Low cycle rate, high water usage

Possible Minor Medium RO system in place. Online EC meter. EC meter in rainwater tank Planet Plumbing Unlikely Minor Low Y CCP18

Odour in recycled water Odour complaints Possible Insignificant Low N

Uses of Recycled Water - Irrigation.

Uses of Recycled Water - Toilet flushing

Uses of Recycled Water - Cooling towers

APPENDIX 4.2.11

RECYCLED WATER MANAGEMENT PLAN EXAMPLE

(CONFIDENTIAL SUBMISSION ONLY)

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